File: | tools/clang/lib/CodeGen/CGDebugInfo.cpp |
Warning: | line 1754, column 40 Called C++ object pointer is null |
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1 | //===--- CGDebugInfo.cpp - Emit Debug Information for a Module ------------===// | |||
2 | // | |||
3 | // The LLVM Compiler Infrastructure | |||
4 | // | |||
5 | // This file is distributed under the University of Illinois Open Source | |||
6 | // License. See LICENSE.TXT for details. | |||
7 | // | |||
8 | //===----------------------------------------------------------------------===// | |||
9 | // | |||
10 | // This coordinates the debug information generation while generating code. | |||
11 | // | |||
12 | //===----------------------------------------------------------------------===// | |||
13 | ||||
14 | #include "CGDebugInfo.h" | |||
15 | #include "CGBlocks.h" | |||
16 | #include "CGCXXABI.h" | |||
17 | #include "CGObjCRuntime.h" | |||
18 | #include "CGRecordLayout.h" | |||
19 | #include "CodeGenFunction.h" | |||
20 | #include "CodeGenModule.h" | |||
21 | #include "ConstantEmitter.h" | |||
22 | #include "clang/AST/ASTContext.h" | |||
23 | #include "clang/AST/DeclFriend.h" | |||
24 | #include "clang/AST/DeclObjC.h" | |||
25 | #include "clang/AST/DeclTemplate.h" | |||
26 | #include "clang/AST/Expr.h" | |||
27 | #include "clang/AST/RecordLayout.h" | |||
28 | #include "clang/Basic/CodeGenOptions.h" | |||
29 | #include "clang/Basic/FileManager.h" | |||
30 | #include "clang/Basic/SourceManager.h" | |||
31 | #include "clang/Basic/Version.h" | |||
32 | #include "clang/Frontend/FrontendOptions.h" | |||
33 | #include "clang/Lex/HeaderSearchOptions.h" | |||
34 | #include "clang/Lex/ModuleMap.h" | |||
35 | #include "clang/Lex/PreprocessorOptions.h" | |||
36 | #include "llvm/ADT/DenseSet.h" | |||
37 | #include "llvm/ADT/SmallVector.h" | |||
38 | #include "llvm/ADT/StringExtras.h" | |||
39 | #include "llvm/IR/Constants.h" | |||
40 | #include "llvm/IR/DataLayout.h" | |||
41 | #include "llvm/IR/DerivedTypes.h" | |||
42 | #include "llvm/IR/Instructions.h" | |||
43 | #include "llvm/IR/Intrinsics.h" | |||
44 | #include "llvm/IR/Metadata.h" | |||
45 | #include "llvm/IR/Module.h" | |||
46 | #include "llvm/Support/FileSystem.h" | |||
47 | #include "llvm/Support/MD5.h" | |||
48 | #include "llvm/Support/Path.h" | |||
49 | using namespace clang; | |||
50 | using namespace clang::CodeGen; | |||
51 | ||||
52 | static uint32_t getTypeAlignIfRequired(const Type *Ty, const ASTContext &Ctx) { | |||
53 | auto TI = Ctx.getTypeInfo(Ty); | |||
54 | return TI.AlignIsRequired ? TI.Align : 0; | |||
55 | } | |||
56 | ||||
57 | static uint32_t getTypeAlignIfRequired(QualType Ty, const ASTContext &Ctx) { | |||
58 | return getTypeAlignIfRequired(Ty.getTypePtr(), Ctx); | |||
59 | } | |||
60 | ||||
61 | static uint32_t getDeclAlignIfRequired(const Decl *D, const ASTContext &Ctx) { | |||
62 | return D->hasAttr<AlignedAttr>() ? D->getMaxAlignment() : 0; | |||
63 | } | |||
64 | ||||
65 | CGDebugInfo::CGDebugInfo(CodeGenModule &CGM) | |||
66 | : CGM(CGM), DebugKind(CGM.getCodeGenOpts().getDebugInfo()), | |||
67 | DebugTypeExtRefs(CGM.getCodeGenOpts().DebugTypeExtRefs), | |||
68 | DBuilder(CGM.getModule()) { | |||
69 | for (const auto &KV : CGM.getCodeGenOpts().DebugPrefixMap) | |||
70 | DebugPrefixMap[KV.first] = KV.second; | |||
71 | CreateCompileUnit(); | |||
72 | } | |||
73 | ||||
74 | CGDebugInfo::~CGDebugInfo() { | |||
75 | assert(LexicalBlockStack.empty() &&((LexicalBlockStack.empty() && "Region stack mismatch, stack not empty!" ) ? static_cast<void> (0) : __assert_fail ("LexicalBlockStack.empty() && \"Region stack mismatch, stack not empty!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 76, __PRETTY_FUNCTION__)) | |||
76 | "Region stack mismatch, stack not empty!")((LexicalBlockStack.empty() && "Region stack mismatch, stack not empty!" ) ? static_cast<void> (0) : __assert_fail ("LexicalBlockStack.empty() && \"Region stack mismatch, stack not empty!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 76, __PRETTY_FUNCTION__)); | |||
77 | } | |||
78 | ||||
79 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, | |||
80 | SourceLocation TemporaryLocation) | |||
81 | : CGF(&CGF) { | |||
82 | init(TemporaryLocation); | |||
83 | } | |||
84 | ||||
85 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, | |||
86 | bool DefaultToEmpty, | |||
87 | SourceLocation TemporaryLocation) | |||
88 | : CGF(&CGF) { | |||
89 | init(TemporaryLocation, DefaultToEmpty); | |||
90 | } | |||
91 | ||||
92 | void ApplyDebugLocation::init(SourceLocation TemporaryLocation, | |||
93 | bool DefaultToEmpty) { | |||
94 | auto *DI = CGF->getDebugInfo(); | |||
95 | if (!DI) { | |||
96 | CGF = nullptr; | |||
97 | return; | |||
98 | } | |||
99 | ||||
100 | OriginalLocation = CGF->Builder.getCurrentDebugLocation(); | |||
101 | ||||
102 | if (OriginalLocation && !DI->CGM.getExpressionLocationsEnabled()) | |||
103 | return; | |||
104 | ||||
105 | if (TemporaryLocation.isValid()) { | |||
106 | DI->EmitLocation(CGF->Builder, TemporaryLocation); | |||
107 | return; | |||
108 | } | |||
109 | ||||
110 | if (DefaultToEmpty) { | |||
111 | CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc()); | |||
112 | return; | |||
113 | } | |||
114 | ||||
115 | // Construct a location that has a valid scope, but no line info. | |||
116 | assert(!DI->LexicalBlockStack.empty())((!DI->LexicalBlockStack.empty()) ? static_cast<void> (0) : __assert_fail ("!DI->LexicalBlockStack.empty()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 116, __PRETTY_FUNCTION__)); | |||
117 | CGF->Builder.SetCurrentDebugLocation(llvm::DebugLoc::get( | |||
118 | 0, 0, DI->LexicalBlockStack.back(), DI->getInlinedAt())); | |||
119 | } | |||
120 | ||||
121 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, const Expr *E) | |||
122 | : CGF(&CGF) { | |||
123 | init(E->getExprLoc()); | |||
124 | } | |||
125 | ||||
126 | ApplyDebugLocation::ApplyDebugLocation(CodeGenFunction &CGF, llvm::DebugLoc Loc) | |||
127 | : CGF(&CGF) { | |||
128 | if (!CGF.getDebugInfo()) { | |||
129 | this->CGF = nullptr; | |||
130 | return; | |||
131 | } | |||
132 | OriginalLocation = CGF.Builder.getCurrentDebugLocation(); | |||
133 | if (Loc) | |||
134 | CGF.Builder.SetCurrentDebugLocation(std::move(Loc)); | |||
135 | } | |||
136 | ||||
137 | ApplyDebugLocation::~ApplyDebugLocation() { | |||
138 | // Query CGF so the location isn't overwritten when location updates are | |||
139 | // temporarily disabled (for C++ default function arguments) | |||
140 | if (CGF) | |||
141 | CGF->Builder.SetCurrentDebugLocation(std::move(OriginalLocation)); | |||
142 | } | |||
143 | ||||
144 | ApplyInlineDebugLocation::ApplyInlineDebugLocation(CodeGenFunction &CGF, | |||
145 | GlobalDecl InlinedFn) | |||
146 | : CGF(&CGF) { | |||
147 | if (!CGF.getDebugInfo()) { | |||
148 | this->CGF = nullptr; | |||
149 | return; | |||
150 | } | |||
151 | auto &DI = *CGF.getDebugInfo(); | |||
152 | SavedLocation = DI.getLocation(); | |||
153 | assert((DI.getInlinedAt() ==(((DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation() ->getInlinedAt()) && "CGDebugInfo and IRBuilder are out of sync" ) ? static_cast<void> (0) : __assert_fail ("(DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) && \"CGDebugInfo and IRBuilder are out of sync\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 155, __PRETTY_FUNCTION__)) | |||
154 | CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) &&(((DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation() ->getInlinedAt()) && "CGDebugInfo and IRBuilder are out of sync" ) ? static_cast<void> (0) : __assert_fail ("(DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) && \"CGDebugInfo and IRBuilder are out of sync\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 155, __PRETTY_FUNCTION__)) | |||
155 | "CGDebugInfo and IRBuilder are out of sync")(((DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation() ->getInlinedAt()) && "CGDebugInfo and IRBuilder are out of sync" ) ? static_cast<void> (0) : __assert_fail ("(DI.getInlinedAt() == CGF.Builder.getCurrentDebugLocation()->getInlinedAt()) && \"CGDebugInfo and IRBuilder are out of sync\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 155, __PRETTY_FUNCTION__)); | |||
156 | ||||
157 | DI.EmitInlineFunctionStart(CGF.Builder, InlinedFn); | |||
158 | } | |||
159 | ||||
160 | ApplyInlineDebugLocation::~ApplyInlineDebugLocation() { | |||
161 | if (!CGF) | |||
162 | return; | |||
163 | auto &DI = *CGF->getDebugInfo(); | |||
164 | DI.EmitInlineFunctionEnd(CGF->Builder); | |||
165 | DI.EmitLocation(CGF->Builder, SavedLocation); | |||
166 | } | |||
167 | ||||
168 | void CGDebugInfo::setLocation(SourceLocation Loc) { | |||
169 | // If the new location isn't valid return. | |||
170 | if (Loc.isInvalid()) | |||
171 | return; | |||
172 | ||||
173 | CurLoc = CGM.getContext().getSourceManager().getExpansionLoc(Loc); | |||
174 | ||||
175 | // If we've changed files in the middle of a lexical scope go ahead | |||
176 | // and create a new lexical scope with file node if it's different | |||
177 | // from the one in the scope. | |||
178 | if (LexicalBlockStack.empty()) | |||
179 | return; | |||
180 | ||||
181 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
182 | auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back()); | |||
183 | PresumedLoc PCLoc = SM.getPresumedLoc(CurLoc); | |||
184 | if (PCLoc.isInvalid() || Scope->getFile() == getOrCreateFile(CurLoc)) | |||
185 | return; | |||
186 | ||||
187 | if (auto *LBF = dyn_cast<llvm::DILexicalBlockFile>(Scope)) { | |||
188 | LexicalBlockStack.pop_back(); | |||
189 | LexicalBlockStack.emplace_back(DBuilder.createLexicalBlockFile( | |||
190 | LBF->getScope(), getOrCreateFile(CurLoc))); | |||
191 | } else if (isa<llvm::DILexicalBlock>(Scope) || | |||
192 | isa<llvm::DISubprogram>(Scope)) { | |||
193 | LexicalBlockStack.pop_back(); | |||
194 | LexicalBlockStack.emplace_back( | |||
195 | DBuilder.createLexicalBlockFile(Scope, getOrCreateFile(CurLoc))); | |||
196 | } | |||
197 | } | |||
198 | ||||
199 | llvm::DIScope *CGDebugInfo::getDeclContextDescriptor(const Decl *D) { | |||
200 | llvm::DIScope *Mod = getParentModuleOrNull(D); | |||
201 | return getContextDescriptor(cast<Decl>(D->getDeclContext()), | |||
202 | Mod ? Mod : TheCU); | |||
203 | } | |||
204 | ||||
205 | llvm::DIScope *CGDebugInfo::getContextDescriptor(const Decl *Context, | |||
206 | llvm::DIScope *Default) { | |||
207 | if (!Context) | |||
208 | return Default; | |||
209 | ||||
210 | auto I = RegionMap.find(Context); | |||
211 | if (I != RegionMap.end()) { | |||
212 | llvm::Metadata *V = I->second; | |||
213 | return dyn_cast_or_null<llvm::DIScope>(V); | |||
214 | } | |||
215 | ||||
216 | // Check namespace. | |||
217 | if (const auto *NSDecl = dyn_cast<NamespaceDecl>(Context)) | |||
218 | return getOrCreateNamespace(NSDecl); | |||
219 | ||||
220 | if (const auto *RDecl = dyn_cast<RecordDecl>(Context)) | |||
221 | if (!RDecl->isDependentType()) | |||
222 | return getOrCreateType(CGM.getContext().getTypeDeclType(RDecl), | |||
223 | TheCU->getFile()); | |||
224 | return Default; | |||
225 | } | |||
226 | ||||
227 | PrintingPolicy CGDebugInfo::getPrintingPolicy() const { | |||
228 | PrintingPolicy PP = CGM.getContext().getPrintingPolicy(); | |||
229 | ||||
230 | // If we're emitting codeview, it's important to try to match MSVC's naming so | |||
231 | // that visualizers written for MSVC will trigger for our class names. In | |||
232 | // particular, we can't have spaces between arguments of standard templates | |||
233 | // like basic_string and vector. | |||
234 | if (CGM.getCodeGenOpts().EmitCodeView) | |||
235 | PP.MSVCFormatting = true; | |||
236 | ||||
237 | // Apply -fdebug-prefix-map. | |||
238 | PP.RemapFilePaths = true; | |||
239 | PP.remapPath = [this](StringRef Path) { return remapDIPath(Path); }; | |||
240 | return PP; | |||
241 | } | |||
242 | ||||
243 | StringRef CGDebugInfo::getFunctionName(const FunctionDecl *FD) { | |||
244 | assert(FD && "Invalid FunctionDecl!")((FD && "Invalid FunctionDecl!") ? static_cast<void > (0) : __assert_fail ("FD && \"Invalid FunctionDecl!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 244, __PRETTY_FUNCTION__)); | |||
245 | IdentifierInfo *FII = FD->getIdentifier(); | |||
246 | FunctionTemplateSpecializationInfo *Info = | |||
247 | FD->getTemplateSpecializationInfo(); | |||
248 | ||||
249 | // Emit the unqualified name in normal operation. LLVM and the debugger can | |||
250 | // compute the fully qualified name from the scope chain. If we're only | |||
251 | // emitting line table info, there won't be any scope chains, so emit the | |||
252 | // fully qualified name here so that stack traces are more accurate. | |||
253 | // FIXME: Do this when emitting DWARF as well as when emitting CodeView after | |||
254 | // evaluating the size impact. | |||
255 | bool UseQualifiedName = DebugKind == codegenoptions::DebugLineTablesOnly && | |||
256 | CGM.getCodeGenOpts().EmitCodeView; | |||
257 | ||||
258 | if (!Info && FII && !UseQualifiedName) | |||
259 | return FII->getName(); | |||
260 | ||||
261 | SmallString<128> NS; | |||
262 | llvm::raw_svector_ostream OS(NS); | |||
263 | if (!UseQualifiedName) | |||
264 | FD->printName(OS); | |||
265 | else | |||
266 | FD->printQualifiedName(OS, getPrintingPolicy()); | |||
267 | ||||
268 | // Add any template specialization args. | |||
269 | if (Info) { | |||
270 | const TemplateArgumentList *TArgs = Info->TemplateArguments; | |||
271 | printTemplateArgumentList(OS, TArgs->asArray(), getPrintingPolicy()); | |||
272 | } | |||
273 | ||||
274 | // Copy this name on the side and use its reference. | |||
275 | return internString(OS.str()); | |||
276 | } | |||
277 | ||||
278 | StringRef CGDebugInfo::getObjCMethodName(const ObjCMethodDecl *OMD) { | |||
279 | SmallString<256> MethodName; | |||
280 | llvm::raw_svector_ostream OS(MethodName); | |||
281 | OS << (OMD->isInstanceMethod() ? '-' : '+') << '['; | |||
282 | const DeclContext *DC = OMD->getDeclContext(); | |||
283 | if (const auto *OID = dyn_cast<ObjCImplementationDecl>(DC)) { | |||
284 | OS << OID->getName(); | |||
285 | } else if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(DC)) { | |||
286 | OS << OID->getName(); | |||
287 | } else if (const auto *OC = dyn_cast<ObjCCategoryDecl>(DC)) { | |||
288 | if (OC->IsClassExtension()) { | |||
289 | OS << OC->getClassInterface()->getName(); | |||
290 | } else { | |||
291 | OS << OC->getIdentifier()->getNameStart() << '(' | |||
292 | << OC->getIdentifier()->getNameStart() << ')'; | |||
293 | } | |||
294 | } else if (const auto *OCD = dyn_cast<ObjCCategoryImplDecl>(DC)) { | |||
295 | OS << OCD->getClassInterface()->getName() << '(' << OCD->getName() << ')'; | |||
296 | } else if (isa<ObjCProtocolDecl>(DC)) { | |||
297 | // We can extract the type of the class from the self pointer. | |||
298 | if (ImplicitParamDecl *SelfDecl = OMD->getSelfDecl()) { | |||
299 | QualType ClassTy = | |||
300 | cast<ObjCObjectPointerType>(SelfDecl->getType())->getPointeeType(); | |||
301 | ClassTy.print(OS, PrintingPolicy(LangOptions())); | |||
302 | } | |||
303 | } | |||
304 | OS << ' ' << OMD->getSelector().getAsString() << ']'; | |||
305 | ||||
306 | return internString(OS.str()); | |||
307 | } | |||
308 | ||||
309 | StringRef CGDebugInfo::getSelectorName(Selector S) { | |||
310 | return internString(S.getAsString()); | |||
311 | } | |||
312 | ||||
313 | StringRef CGDebugInfo::getClassName(const RecordDecl *RD) { | |||
314 | if (isa<ClassTemplateSpecializationDecl>(RD)) { | |||
315 | SmallString<128> Name; | |||
316 | llvm::raw_svector_ostream OS(Name); | |||
317 | RD->getNameForDiagnostic(OS, getPrintingPolicy(), | |||
318 | /*Qualified*/ false); | |||
319 | ||||
320 | // Copy this name on the side and use its reference. | |||
321 | return internString(Name); | |||
322 | } | |||
323 | ||||
324 | // quick optimization to avoid having to intern strings that are already | |||
325 | // stored reliably elsewhere | |||
326 | if (const IdentifierInfo *II = RD->getIdentifier()) | |||
327 | return II->getName(); | |||
328 | ||||
329 | // The CodeView printer in LLVM wants to see the names of unnamed types: it is | |||
330 | // used to reconstruct the fully qualified type names. | |||
331 | if (CGM.getCodeGenOpts().EmitCodeView) { | |||
332 | if (const TypedefNameDecl *D = RD->getTypedefNameForAnonDecl()) { | |||
333 | assert(RD->getDeclContext() == D->getDeclContext() &&((RD->getDeclContext() == D->getDeclContext() && "Typedef should not be in another decl context!") ? static_cast <void> (0) : __assert_fail ("RD->getDeclContext() == D->getDeclContext() && \"Typedef should not be in another decl context!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 334, __PRETTY_FUNCTION__)) | |||
334 | "Typedef should not be in another decl context!")((RD->getDeclContext() == D->getDeclContext() && "Typedef should not be in another decl context!") ? static_cast <void> (0) : __assert_fail ("RD->getDeclContext() == D->getDeclContext() && \"Typedef should not be in another decl context!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 334, __PRETTY_FUNCTION__)); | |||
335 | assert(D->getDeclName().getAsIdentifierInfo() &&((D->getDeclName().getAsIdentifierInfo() && "Typedef was not named!" ) ? static_cast<void> (0) : __assert_fail ("D->getDeclName().getAsIdentifierInfo() && \"Typedef was not named!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 336, __PRETTY_FUNCTION__)) | |||
336 | "Typedef was not named!")((D->getDeclName().getAsIdentifierInfo() && "Typedef was not named!" ) ? static_cast<void> (0) : __assert_fail ("D->getDeclName().getAsIdentifierInfo() && \"Typedef was not named!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 336, __PRETTY_FUNCTION__)); | |||
337 | return D->getDeclName().getAsIdentifierInfo()->getName(); | |||
338 | } | |||
339 | ||||
340 | if (CGM.getLangOpts().CPlusPlus) { | |||
341 | StringRef Name; | |||
342 | ||||
343 | ASTContext &Context = CGM.getContext(); | |||
344 | if (const DeclaratorDecl *DD = Context.getDeclaratorForUnnamedTagDecl(RD)) | |||
345 | // Anonymous types without a name for linkage purposes have their | |||
346 | // declarator mangled in if they have one. | |||
347 | Name = DD->getName(); | |||
348 | else if (const TypedefNameDecl *TND = | |||
349 | Context.getTypedefNameForUnnamedTagDecl(RD)) | |||
350 | // Anonymous types without a name for linkage purposes have their | |||
351 | // associate typedef mangled in if they have one. | |||
352 | Name = TND->getName(); | |||
353 | ||||
354 | if (!Name.empty()) { | |||
355 | SmallString<256> UnnamedType("<unnamed-type-"); | |||
356 | UnnamedType += Name; | |||
357 | UnnamedType += '>'; | |||
358 | return internString(UnnamedType); | |||
359 | } | |||
360 | } | |||
361 | } | |||
362 | ||||
363 | return StringRef(); | |||
364 | } | |||
365 | ||||
366 | Optional<llvm::DIFile::ChecksumKind> | |||
367 | CGDebugInfo::computeChecksum(FileID FID, SmallString<32> &Checksum) const { | |||
368 | Checksum.clear(); | |||
369 | ||||
370 | if (!CGM.getCodeGenOpts().EmitCodeView && | |||
371 | CGM.getCodeGenOpts().DwarfVersion < 5) | |||
372 | return None; | |||
373 | ||||
374 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
375 | bool Invalid; | |||
376 | llvm::MemoryBuffer *MemBuffer = SM.getBuffer(FID, &Invalid); | |||
377 | if (Invalid) | |||
378 | return None; | |||
379 | ||||
380 | llvm::MD5 Hash; | |||
381 | llvm::MD5::MD5Result Result; | |||
382 | ||||
383 | Hash.update(MemBuffer->getBuffer()); | |||
384 | Hash.final(Result); | |||
385 | ||||
386 | Hash.stringifyResult(Result, Checksum); | |||
387 | return llvm::DIFile::CSK_MD5; | |||
388 | } | |||
389 | ||||
390 | Optional<StringRef> CGDebugInfo::getSource(const SourceManager &SM, | |||
391 | FileID FID) { | |||
392 | if (!CGM.getCodeGenOpts().EmbedSource) | |||
393 | return None; | |||
394 | ||||
395 | bool SourceInvalid = false; | |||
396 | StringRef Source = SM.getBufferData(FID, &SourceInvalid); | |||
397 | ||||
398 | if (SourceInvalid) | |||
399 | return None; | |||
400 | ||||
401 | return Source; | |||
402 | } | |||
403 | ||||
404 | llvm::DIFile *CGDebugInfo::getOrCreateFile(SourceLocation Loc) { | |||
405 | if (!Loc.isValid()) | |||
406 | // If Location is not valid then use main input file. | |||
407 | return TheCU->getFile(); | |||
408 | ||||
409 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
410 | PresumedLoc PLoc = SM.getPresumedLoc(Loc); | |||
411 | ||||
412 | StringRef FileName = PLoc.getFilename(); | |||
413 | if (PLoc.isInvalid() || FileName.empty()) | |||
414 | // If the location is not valid then use main input file. | |||
415 | return TheCU->getFile(); | |||
416 | ||||
417 | // Cache the results. | |||
418 | auto It = DIFileCache.find(FileName.data()); | |||
419 | if (It != DIFileCache.end()) { | |||
420 | // Verify that the information still exists. | |||
421 | if (llvm::Metadata *V = It->second) | |||
422 | return cast<llvm::DIFile>(V); | |||
423 | } | |||
424 | ||||
425 | SmallString<32> Checksum; | |||
426 | Optional<llvm::DIFile::ChecksumKind> CSKind = | |||
427 | computeChecksum(SM.getFileID(Loc), Checksum); | |||
428 | Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo; | |||
429 | if (CSKind) | |||
430 | CSInfo.emplace(*CSKind, Checksum); | |||
431 | return createFile(FileName, CSInfo, getSource(SM, SM.getFileID(Loc))); | |||
432 | } | |||
433 | ||||
434 | llvm::DIFile * | |||
435 | CGDebugInfo::createFile(StringRef FileName, | |||
436 | Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo, | |||
437 | Optional<StringRef> Source) { | |||
438 | StringRef Dir; | |||
439 | StringRef File; | |||
440 | std::string RemappedFile = remapDIPath(FileName); | |||
441 | std::string CurDir = remapDIPath(getCurrentDirname()); | |||
442 | SmallString<128> DirBuf; | |||
443 | SmallString<128> FileBuf; | |||
444 | if (llvm::sys::path::is_absolute(RemappedFile)) { | |||
445 | // Strip the common prefix (if it is more than just "/") from current | |||
446 | // directory and FileName for a more space-efficient encoding. | |||
447 | auto FileIt = llvm::sys::path::begin(RemappedFile); | |||
448 | auto FileE = llvm::sys::path::end(RemappedFile); | |||
449 | auto CurDirIt = llvm::sys::path::begin(CurDir); | |||
450 | auto CurDirE = llvm::sys::path::end(CurDir); | |||
451 | for (; CurDirIt != CurDirE && *CurDirIt == *FileIt; ++CurDirIt, ++FileIt) | |||
452 | llvm::sys::path::append(DirBuf, *CurDirIt); | |||
453 | if (std::distance(llvm::sys::path::begin(CurDir), CurDirIt) == 1) { | |||
454 | // The common prefix only the root; stripping it would cause | |||
455 | // LLVM diagnostic locations to be more confusing. | |||
456 | Dir = {}; | |||
457 | File = RemappedFile; | |||
458 | } else { | |||
459 | for (; FileIt != FileE; ++FileIt) | |||
460 | llvm::sys::path::append(FileBuf, *FileIt); | |||
461 | Dir = DirBuf; | |||
462 | File = FileBuf; | |||
463 | } | |||
464 | } else { | |||
465 | Dir = CurDir; | |||
466 | File = RemappedFile; | |||
467 | } | |||
468 | llvm::DIFile *F = DBuilder.createFile(File, Dir, CSInfo, Source); | |||
469 | DIFileCache[FileName.data()].reset(F); | |||
470 | return F; | |||
471 | } | |||
472 | ||||
473 | std::string CGDebugInfo::remapDIPath(StringRef Path) const { | |||
474 | for (const auto &Entry : DebugPrefixMap) | |||
475 | if (Path.startswith(Entry.first)) | |||
476 | return (Twine(Entry.second) + Path.substr(Entry.first.size())).str(); | |||
477 | return Path.str(); | |||
478 | } | |||
479 | ||||
480 | unsigned CGDebugInfo::getLineNumber(SourceLocation Loc) { | |||
481 | if (Loc.isInvalid() && CurLoc.isInvalid()) | |||
482 | return 0; | |||
483 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
484 | PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc); | |||
485 | return PLoc.isValid() ? PLoc.getLine() : 0; | |||
486 | } | |||
487 | ||||
488 | unsigned CGDebugInfo::getColumnNumber(SourceLocation Loc, bool Force) { | |||
489 | // We may not want column information at all. | |||
490 | if (!Force && !CGM.getCodeGenOpts().DebugColumnInfo) | |||
491 | return 0; | |||
492 | ||||
493 | // If the location is invalid then use the current column. | |||
494 | if (Loc.isInvalid() && CurLoc.isInvalid()) | |||
495 | return 0; | |||
496 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
497 | PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc); | |||
498 | return PLoc.isValid() ? PLoc.getColumn() : 0; | |||
499 | } | |||
500 | ||||
501 | StringRef CGDebugInfo::getCurrentDirname() { | |||
502 | if (!CGM.getCodeGenOpts().DebugCompilationDir.empty()) | |||
503 | return CGM.getCodeGenOpts().DebugCompilationDir; | |||
504 | ||||
505 | if (!CWDName.empty()) | |||
506 | return CWDName; | |||
507 | SmallString<256> CWD; | |||
508 | llvm::sys::fs::current_path(CWD); | |||
509 | return CWDName = internString(CWD); | |||
510 | } | |||
511 | ||||
512 | void CGDebugInfo::CreateCompileUnit() { | |||
513 | SmallString<32> Checksum; | |||
514 | Optional<llvm::DIFile::ChecksumKind> CSKind; | |||
515 | Optional<llvm::DIFile::ChecksumInfo<StringRef>> CSInfo; | |||
516 | ||||
517 | // Should we be asking the SourceManager for the main file name, instead of | |||
518 | // accepting it as an argument? This just causes the main file name to | |||
519 | // mismatch with source locations and create extra lexical scopes or | |||
520 | // mismatched debug info (a CU with a DW_AT_file of "-", because that's what | |||
521 | // the driver passed, but functions/other things have DW_AT_file of "<stdin>" | |||
522 | // because that's what the SourceManager says) | |||
523 | ||||
524 | // Get absolute path name. | |||
525 | SourceManager &SM = CGM.getContext().getSourceManager(); | |||
526 | std::string MainFileName = CGM.getCodeGenOpts().MainFileName; | |||
527 | if (MainFileName.empty()) | |||
528 | MainFileName = "<stdin>"; | |||
529 | ||||
530 | // The main file name provided via the "-main-file-name" option contains just | |||
531 | // the file name itself with no path information. This file name may have had | |||
532 | // a relative path, so we look into the actual file entry for the main | |||
533 | // file to determine the real absolute path for the file. | |||
534 | std::string MainFileDir; | |||
535 | if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) { | |||
536 | MainFileDir = remapDIPath(MainFile->getDir()->getName()); | |||
537 | if (MainFileDir != ".") { | |||
538 | llvm::SmallString<1024> MainFileDirSS(MainFileDir); | |||
539 | llvm::sys::path::append(MainFileDirSS, MainFileName); | |||
540 | MainFileName = MainFileDirSS.str(); | |||
541 | } | |||
542 | // If the main file name provided is identical to the input file name, and | |||
543 | // if the input file is a preprocessed source, use the module name for | |||
544 | // debug info. The module name comes from the name specified in the first | |||
545 | // linemarker if the input is a preprocessed source. | |||
546 | if (MainFile->getName() == MainFileName && | |||
547 | FrontendOptions::getInputKindForExtension( | |||
548 | MainFile->getName().rsplit('.').second) | |||
549 | .isPreprocessed()) | |||
550 | MainFileName = CGM.getModule().getName().str(); | |||
551 | ||||
552 | CSKind = computeChecksum(SM.getMainFileID(), Checksum); | |||
553 | } | |||
554 | ||||
555 | llvm::dwarf::SourceLanguage LangTag; | |||
556 | const LangOptions &LO = CGM.getLangOpts(); | |||
557 | if (LO.CPlusPlus) { | |||
558 | if (LO.ObjC) | |||
559 | LangTag = llvm::dwarf::DW_LANG_ObjC_plus_plus; | |||
560 | else | |||
561 | LangTag = llvm::dwarf::DW_LANG_C_plus_plus; | |||
562 | } else if (LO.ObjC) { | |||
563 | LangTag = llvm::dwarf::DW_LANG_ObjC; | |||
564 | } else if (LO.RenderScript) { | |||
565 | LangTag = llvm::dwarf::DW_LANG_GOOGLE_RenderScript; | |||
566 | } else if (LO.C99) { | |||
567 | LangTag = llvm::dwarf::DW_LANG_C99; | |||
568 | } else { | |||
569 | LangTag = llvm::dwarf::DW_LANG_C89; | |||
570 | } | |||
571 | ||||
572 | std::string Producer = getClangFullVersion(); | |||
573 | ||||
574 | // Figure out which version of the ObjC runtime we have. | |||
575 | unsigned RuntimeVers = 0; | |||
576 | if (LO.ObjC) | |||
577 | RuntimeVers = LO.ObjCRuntime.isNonFragile() ? 2 : 1; | |||
578 | ||||
579 | llvm::DICompileUnit::DebugEmissionKind EmissionKind; | |||
580 | switch (DebugKind) { | |||
581 | case codegenoptions::NoDebugInfo: | |||
582 | case codegenoptions::LocTrackingOnly: | |||
583 | EmissionKind = llvm::DICompileUnit::NoDebug; | |||
584 | break; | |||
585 | case codegenoptions::DebugLineTablesOnly: | |||
586 | EmissionKind = llvm::DICompileUnit::LineTablesOnly; | |||
587 | break; | |||
588 | case codegenoptions::DebugDirectivesOnly: | |||
589 | EmissionKind = llvm::DICompileUnit::DebugDirectivesOnly; | |||
590 | break; | |||
591 | case codegenoptions::LimitedDebugInfo: | |||
592 | case codegenoptions::FullDebugInfo: | |||
593 | EmissionKind = llvm::DICompileUnit::FullDebug; | |||
594 | break; | |||
595 | } | |||
596 | ||||
597 | uint64_t DwoId = 0; | |||
598 | auto &CGOpts = CGM.getCodeGenOpts(); | |||
599 | // The DIFile used by the CU is distinct from the main source | |||
600 | // file. Its directory part specifies what becomes the | |||
601 | // DW_AT_comp_dir (the compilation directory), even if the source | |||
602 | // file was specified with an absolute path. | |||
603 | if (CSKind) | |||
604 | CSInfo.emplace(*CSKind, Checksum); | |||
605 | llvm::DIFile *CUFile = DBuilder.createFile( | |||
606 | remapDIPath(MainFileName), remapDIPath(getCurrentDirname()), CSInfo, | |||
607 | getSource(SM, SM.getMainFileID())); | |||
608 | ||||
609 | // Create new compile unit. | |||
610 | TheCU = DBuilder.createCompileUnit( | |||
611 | LangTag, CUFile, CGOpts.EmitVersionIdentMetadata ? Producer : "", | |||
612 | LO.Optimize || CGOpts.PrepareForLTO || CGOpts.PrepareForThinLTO, | |||
613 | CGOpts.DwarfDebugFlags, RuntimeVers, | |||
614 | (CGOpts.getSplitDwarfMode() != CodeGenOptions::NoFission) | |||
615 | ? "" | |||
616 | : CGOpts.SplitDwarfFile, | |||
617 | EmissionKind, DwoId, CGOpts.SplitDwarfInlining, | |||
618 | CGOpts.DebugInfoForProfiling, | |||
619 | CGM.getTarget().getTriple().isNVPTX() | |||
620 | ? llvm::DICompileUnit::DebugNameTableKind::None | |||
621 | : static_cast<llvm::DICompileUnit::DebugNameTableKind>( | |||
622 | CGOpts.DebugNameTable), | |||
623 | CGOpts.DebugRangesBaseAddress); | |||
624 | } | |||
625 | ||||
626 | llvm::DIType *CGDebugInfo::CreateType(const BuiltinType *BT) { | |||
627 | llvm::dwarf::TypeKind Encoding; | |||
628 | StringRef BTName; | |||
629 | switch (BT->getKind()) { | |||
630 | #define BUILTIN_TYPE(Id, SingletonId) | |||
631 | #define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id: | |||
632 | #include "clang/AST/BuiltinTypes.def" | |||
633 | case BuiltinType::Dependent: | |||
634 | llvm_unreachable("Unexpected builtin type")::llvm::llvm_unreachable_internal("Unexpected builtin type", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 634); | |||
635 | case BuiltinType::NullPtr: | |||
636 | return DBuilder.createNullPtrType(); | |||
637 | case BuiltinType::Void: | |||
638 | return nullptr; | |||
639 | case BuiltinType::ObjCClass: | |||
640 | if (!ClassTy) | |||
641 | ClassTy = | |||
642 | DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
643 | "objc_class", TheCU, TheCU->getFile(), 0); | |||
644 | return ClassTy; | |||
645 | case BuiltinType::ObjCId: { | |||
646 | // typedef struct objc_class *Class; | |||
647 | // typedef struct objc_object { | |||
648 | // Class isa; | |||
649 | // } *id; | |||
650 | ||||
651 | if (ObjTy) | |||
652 | return ObjTy; | |||
653 | ||||
654 | if (!ClassTy) | |||
655 | ClassTy = | |||
656 | DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
657 | "objc_class", TheCU, TheCU->getFile(), 0); | |||
658 | ||||
659 | unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
660 | ||||
661 | auto *ISATy = DBuilder.createPointerType(ClassTy, Size); | |||
662 | ||||
663 | ObjTy = DBuilder.createStructType(TheCU, "objc_object", TheCU->getFile(), 0, | |||
664 | 0, 0, llvm::DINode::FlagZero, nullptr, | |||
665 | llvm::DINodeArray()); | |||
666 | ||||
667 | DBuilder.replaceArrays( | |||
668 | ObjTy, DBuilder.getOrCreateArray(&*DBuilder.createMemberType( | |||
669 | ObjTy, "isa", TheCU->getFile(), 0, Size, 0, 0, | |||
670 | llvm::DINode::FlagZero, ISATy))); | |||
671 | return ObjTy; | |||
672 | } | |||
673 | case BuiltinType::ObjCSel: { | |||
674 | if (!SelTy) | |||
675 | SelTy = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
676 | "objc_selector", TheCU, | |||
677 | TheCU->getFile(), 0); | |||
678 | return SelTy; | |||
679 | } | |||
680 | ||||
681 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | |||
682 | case BuiltinType::Id: \ | |||
683 | return getOrCreateStructPtrType("opencl_" #ImgType "_" #Suffix "_t", \ | |||
684 | SingletonId); | |||
685 | #include "clang/Basic/OpenCLImageTypes.def" | |||
686 | case BuiltinType::OCLSampler: | |||
687 | return getOrCreateStructPtrType("opencl_sampler_t", OCLSamplerDITy); | |||
688 | case BuiltinType::OCLEvent: | |||
689 | return getOrCreateStructPtrType("opencl_event_t", OCLEventDITy); | |||
690 | case BuiltinType::OCLClkEvent: | |||
691 | return getOrCreateStructPtrType("opencl_clk_event_t", OCLClkEventDITy); | |||
692 | case BuiltinType::OCLQueue: | |||
693 | return getOrCreateStructPtrType("opencl_queue_t", OCLQueueDITy); | |||
694 | case BuiltinType::OCLReserveID: | |||
695 | return getOrCreateStructPtrType("opencl_reserve_id_t", OCLReserveIDDITy); | |||
696 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ | |||
697 | case BuiltinType::Id: \ | |||
698 | return getOrCreateStructPtrType("opencl_" #ExtType, Id##Ty); | |||
699 | #include "clang/Basic/OpenCLExtensionTypes.def" | |||
700 | ||||
701 | case BuiltinType::UChar: | |||
702 | case BuiltinType::Char_U: | |||
703 | Encoding = llvm::dwarf::DW_ATE_unsigned_char; | |||
704 | break; | |||
705 | case BuiltinType::Char_S: | |||
706 | case BuiltinType::SChar: | |||
707 | Encoding = llvm::dwarf::DW_ATE_signed_char; | |||
708 | break; | |||
709 | case BuiltinType::Char8: | |||
710 | case BuiltinType::Char16: | |||
711 | case BuiltinType::Char32: | |||
712 | Encoding = llvm::dwarf::DW_ATE_UTF; | |||
713 | break; | |||
714 | case BuiltinType::UShort: | |||
715 | case BuiltinType::UInt: | |||
716 | case BuiltinType::UInt128: | |||
717 | case BuiltinType::ULong: | |||
718 | case BuiltinType::WChar_U: | |||
719 | case BuiltinType::ULongLong: | |||
720 | Encoding = llvm::dwarf::DW_ATE_unsigned; | |||
721 | break; | |||
722 | case BuiltinType::Short: | |||
723 | case BuiltinType::Int: | |||
724 | case BuiltinType::Int128: | |||
725 | case BuiltinType::Long: | |||
726 | case BuiltinType::WChar_S: | |||
727 | case BuiltinType::LongLong: | |||
728 | Encoding = llvm::dwarf::DW_ATE_signed; | |||
729 | break; | |||
730 | case BuiltinType::Bool: | |||
731 | Encoding = llvm::dwarf::DW_ATE_boolean; | |||
732 | break; | |||
733 | case BuiltinType::Half: | |||
734 | case BuiltinType::Float: | |||
735 | case BuiltinType::LongDouble: | |||
736 | case BuiltinType::Float16: | |||
737 | case BuiltinType::Float128: | |||
738 | case BuiltinType::Double: | |||
739 | // FIXME: For targets where long double and __float128 have the same size, | |||
740 | // they are currently indistinguishable in the debugger without some | |||
741 | // special treatment. However, there is currently no consensus on encoding | |||
742 | // and this should be updated once a DWARF encoding exists for distinct | |||
743 | // floating point types of the same size. | |||
744 | Encoding = llvm::dwarf::DW_ATE_float; | |||
745 | break; | |||
746 | case BuiltinType::ShortAccum: | |||
747 | case BuiltinType::Accum: | |||
748 | case BuiltinType::LongAccum: | |||
749 | case BuiltinType::ShortFract: | |||
750 | case BuiltinType::Fract: | |||
751 | case BuiltinType::LongFract: | |||
752 | case BuiltinType::SatShortFract: | |||
753 | case BuiltinType::SatFract: | |||
754 | case BuiltinType::SatLongFract: | |||
755 | case BuiltinType::SatShortAccum: | |||
756 | case BuiltinType::SatAccum: | |||
757 | case BuiltinType::SatLongAccum: | |||
758 | Encoding = llvm::dwarf::DW_ATE_signed_fixed; | |||
759 | break; | |||
760 | case BuiltinType::UShortAccum: | |||
761 | case BuiltinType::UAccum: | |||
762 | case BuiltinType::ULongAccum: | |||
763 | case BuiltinType::UShortFract: | |||
764 | case BuiltinType::UFract: | |||
765 | case BuiltinType::ULongFract: | |||
766 | case BuiltinType::SatUShortAccum: | |||
767 | case BuiltinType::SatUAccum: | |||
768 | case BuiltinType::SatULongAccum: | |||
769 | case BuiltinType::SatUShortFract: | |||
770 | case BuiltinType::SatUFract: | |||
771 | case BuiltinType::SatULongFract: | |||
772 | Encoding = llvm::dwarf::DW_ATE_unsigned_fixed; | |||
773 | break; | |||
774 | } | |||
775 | ||||
776 | switch (BT->getKind()) { | |||
777 | case BuiltinType::Long: | |||
778 | BTName = "long int"; | |||
779 | break; | |||
780 | case BuiltinType::LongLong: | |||
781 | BTName = "long long int"; | |||
782 | break; | |||
783 | case BuiltinType::ULong: | |||
784 | BTName = "long unsigned int"; | |||
785 | break; | |||
786 | case BuiltinType::ULongLong: | |||
787 | BTName = "long long unsigned int"; | |||
788 | break; | |||
789 | default: | |||
790 | BTName = BT->getName(CGM.getLangOpts()); | |||
791 | break; | |||
792 | } | |||
793 | // Bit size and offset of the type. | |||
794 | uint64_t Size = CGM.getContext().getTypeSize(BT); | |||
795 | return DBuilder.createBasicType(BTName, Size, Encoding); | |||
796 | } | |||
797 | ||||
798 | llvm::DIType *CGDebugInfo::CreateType(const ComplexType *Ty) { | |||
799 | // Bit size and offset of the type. | |||
800 | llvm::dwarf::TypeKind Encoding = llvm::dwarf::DW_ATE_complex_float; | |||
801 | if (Ty->isComplexIntegerType()) | |||
802 | Encoding = llvm::dwarf::DW_ATE_lo_user; | |||
803 | ||||
804 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
805 | return DBuilder.createBasicType("complex", Size, Encoding); | |||
806 | } | |||
807 | ||||
808 | llvm::DIType *CGDebugInfo::CreateQualifiedType(QualType Ty, | |||
809 | llvm::DIFile *Unit) { | |||
810 | QualifierCollector Qc; | |||
811 | const Type *T = Qc.strip(Ty); | |||
812 | ||||
813 | // Ignore these qualifiers for now. | |||
814 | Qc.removeObjCGCAttr(); | |||
815 | Qc.removeAddressSpace(); | |||
816 | Qc.removeObjCLifetime(); | |||
817 | ||||
818 | // We will create one Derived type for one qualifier and recurse to handle any | |||
819 | // additional ones. | |||
820 | llvm::dwarf::Tag Tag; | |||
821 | if (Qc.hasConst()) { | |||
822 | Tag = llvm::dwarf::DW_TAG_const_type; | |||
823 | Qc.removeConst(); | |||
824 | } else if (Qc.hasVolatile()) { | |||
825 | Tag = llvm::dwarf::DW_TAG_volatile_type; | |||
826 | Qc.removeVolatile(); | |||
827 | } else if (Qc.hasRestrict()) { | |||
828 | Tag = llvm::dwarf::DW_TAG_restrict_type; | |||
829 | Qc.removeRestrict(); | |||
830 | } else { | |||
831 | assert(Qc.empty() && "Unknown type qualifier for debug info")((Qc.empty() && "Unknown type qualifier for debug info" ) ? static_cast<void> (0) : __assert_fail ("Qc.empty() && \"Unknown type qualifier for debug info\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 831, __PRETTY_FUNCTION__)); | |||
832 | return getOrCreateType(QualType(T, 0), Unit); | |||
833 | } | |||
834 | ||||
835 | auto *FromTy = getOrCreateType(Qc.apply(CGM.getContext(), T), Unit); | |||
836 | ||||
837 | // No need to fill in the Name, Line, Size, Alignment, Offset in case of | |||
838 | // CVR derived types. | |||
839 | return DBuilder.createQualifiedType(Tag, FromTy); | |||
840 | } | |||
841 | ||||
842 | llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectPointerType *Ty, | |||
843 | llvm::DIFile *Unit) { | |||
844 | ||||
845 | // The frontend treats 'id' as a typedef to an ObjCObjectType, | |||
846 | // whereas 'id<protocol>' is treated as an ObjCPointerType. For the | |||
847 | // debug info, we want to emit 'id' in both cases. | |||
848 | if (Ty->isObjCQualifiedIdType()) | |||
849 | return getOrCreateType(CGM.getContext().getObjCIdType(), Unit); | |||
850 | ||||
851 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty, | |||
852 | Ty->getPointeeType(), Unit); | |||
853 | } | |||
854 | ||||
855 | llvm::DIType *CGDebugInfo::CreateType(const PointerType *Ty, | |||
856 | llvm::DIFile *Unit) { | |||
857 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty, | |||
858 | Ty->getPointeeType(), Unit); | |||
859 | } | |||
860 | ||||
861 | /// \return whether a C++ mangling exists for the type defined by TD. | |||
862 | static bool hasCXXMangling(const TagDecl *TD, llvm::DICompileUnit *TheCU) { | |||
863 | switch (TheCU->getSourceLanguage()) { | |||
864 | case llvm::dwarf::DW_LANG_C_plus_plus: | |||
865 | return true; | |||
866 | case llvm::dwarf::DW_LANG_ObjC_plus_plus: | |||
867 | return isa<CXXRecordDecl>(TD) || isa<EnumDecl>(TD); | |||
868 | default: | |||
869 | return false; | |||
870 | } | |||
871 | } | |||
872 | ||||
873 | // Determines if the debug info for this tag declaration needs a type | |||
874 | // identifier. The purpose of the unique identifier is to deduplicate type | |||
875 | // information for identical types across TUs. Because of the C++ one definition | |||
876 | // rule (ODR), it is valid to assume that the type is defined the same way in | |||
877 | // every TU and its debug info is equivalent. | |||
878 | // | |||
879 | // C does not have the ODR, and it is common for codebases to contain multiple | |||
880 | // different definitions of a struct with the same name in different TUs. | |||
881 | // Therefore, if the type doesn't have a C++ mangling, don't give it an | |||
882 | // identifer. Type information in C is smaller and simpler than C++ type | |||
883 | // information, so the increase in debug info size is negligible. | |||
884 | // | |||
885 | // If the type is not externally visible, it should be unique to the current TU, | |||
886 | // and should not need an identifier to participate in type deduplication. | |||
887 | // However, when emitting CodeView, the format internally uses these | |||
888 | // unique type name identifers for references between debug info. For example, | |||
889 | // the method of a class in an anonymous namespace uses the identifer to refer | |||
890 | // to its parent class. The Microsoft C++ ABI attempts to provide unique names | |||
891 | // for such types, so when emitting CodeView, always use identifiers for C++ | |||
892 | // types. This may create problems when attempting to emit CodeView when the MS | |||
893 | // C++ ABI is not in use. | |||
894 | static bool needsTypeIdentifier(const TagDecl *TD, CodeGenModule &CGM, | |||
895 | llvm::DICompileUnit *TheCU) { | |||
896 | // We only add a type identifier for types with C++ name mangling. | |||
897 | if (!hasCXXMangling(TD, TheCU)) | |||
898 | return false; | |||
899 | ||||
900 | // Externally visible types with C++ mangling need a type identifier. | |||
901 | if (TD->isExternallyVisible()) | |||
902 | return true; | |||
903 | ||||
904 | // CodeView types with C++ mangling need a type identifier. | |||
905 | if (CGM.getCodeGenOpts().EmitCodeView) | |||
906 | return true; | |||
907 | ||||
908 | return false; | |||
909 | } | |||
910 | ||||
911 | // Returns a unique type identifier string if one exists, or an empty string. | |||
912 | static SmallString<256> getTypeIdentifier(const TagType *Ty, CodeGenModule &CGM, | |||
913 | llvm::DICompileUnit *TheCU) { | |||
914 | SmallString<256> Identifier; | |||
915 | const TagDecl *TD = Ty->getDecl(); | |||
916 | ||||
917 | if (!needsTypeIdentifier(TD, CGM, TheCU)) | |||
918 | return Identifier; | |||
919 | ||||
920 | // TODO: This is using the RTTI name. Is there a better way to get | |||
921 | // a unique string for a type? | |||
922 | llvm::raw_svector_ostream Out(Identifier); | |||
923 | CGM.getCXXABI().getMangleContext().mangleCXXRTTIName(QualType(Ty, 0), Out); | |||
924 | return Identifier; | |||
925 | } | |||
926 | ||||
927 | /// \return the appropriate DWARF tag for a composite type. | |||
928 | static llvm::dwarf::Tag getTagForRecord(const RecordDecl *RD) { | |||
929 | llvm::dwarf::Tag Tag; | |||
930 | if (RD->isStruct() || RD->isInterface()) | |||
931 | Tag = llvm::dwarf::DW_TAG_structure_type; | |||
932 | else if (RD->isUnion()) | |||
933 | Tag = llvm::dwarf::DW_TAG_union_type; | |||
934 | else { | |||
935 | // FIXME: This could be a struct type giving a default visibility different | |||
936 | // than C++ class type, but needs llvm metadata changes first. | |||
937 | assert(RD->isClass())((RD->isClass()) ? static_cast<void> (0) : __assert_fail ("RD->isClass()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 937, __PRETTY_FUNCTION__)); | |||
938 | Tag = llvm::dwarf::DW_TAG_class_type; | |||
939 | } | |||
940 | return Tag; | |||
941 | } | |||
942 | ||||
943 | llvm::DICompositeType * | |||
944 | CGDebugInfo::getOrCreateRecordFwdDecl(const RecordType *Ty, | |||
945 | llvm::DIScope *Ctx) { | |||
946 | const RecordDecl *RD = Ty->getDecl(); | |||
947 | if (llvm::DIType *T = getTypeOrNull(CGM.getContext().getRecordType(RD))) | |||
948 | return cast<llvm::DICompositeType>(T); | |||
949 | llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation()); | |||
950 | unsigned Line = getLineNumber(RD->getLocation()); | |||
951 | StringRef RDName = getClassName(RD); | |||
952 | ||||
953 | uint64_t Size = 0; | |||
954 | uint32_t Align = 0; | |||
955 | ||||
956 | // Create the type. | |||
957 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
958 | llvm::DICompositeType *RetTy = DBuilder.createReplaceableCompositeType( | |||
959 | getTagForRecord(RD), RDName, Ctx, DefUnit, Line, 0, Size, Align, | |||
960 | llvm::DINode::FlagFwdDecl, Identifier); | |||
961 | if (CGM.getCodeGenOpts().DebugFwdTemplateParams) | |||
962 | if (auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD)) | |||
963 | DBuilder.replaceArrays(RetTy, llvm::DINodeArray(), | |||
964 | CollectCXXTemplateParams(TSpecial, DefUnit)); | |||
965 | ReplaceMap.emplace_back( | |||
966 | std::piecewise_construct, std::make_tuple(Ty), | |||
967 | std::make_tuple(static_cast<llvm::Metadata *>(RetTy))); | |||
968 | return RetTy; | |||
969 | } | |||
970 | ||||
971 | llvm::DIType *CGDebugInfo::CreatePointerLikeType(llvm::dwarf::Tag Tag, | |||
972 | const Type *Ty, | |||
973 | QualType PointeeTy, | |||
974 | llvm::DIFile *Unit) { | |||
975 | // Bit size, align and offset of the type. | |||
976 | // Size is always the size of a pointer. We can't use getTypeSize here | |||
977 | // because that does not return the correct value for references. | |||
978 | unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(PointeeTy); | |||
979 | uint64_t Size = CGM.getTarget().getPointerWidth(AddressSpace); | |||
980 | auto Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
981 | Optional<unsigned> DWARFAddressSpace = | |||
982 | CGM.getTarget().getDWARFAddressSpace(AddressSpace); | |||
983 | ||||
984 | if (Tag == llvm::dwarf::DW_TAG_reference_type || | |||
985 | Tag == llvm::dwarf::DW_TAG_rvalue_reference_type) | |||
986 | return DBuilder.createReferenceType(Tag, getOrCreateType(PointeeTy, Unit), | |||
987 | Size, Align, DWARFAddressSpace); | |||
988 | else | |||
989 | return DBuilder.createPointerType(getOrCreateType(PointeeTy, Unit), Size, | |||
990 | Align, DWARFAddressSpace); | |||
991 | } | |||
992 | ||||
993 | llvm::DIType *CGDebugInfo::getOrCreateStructPtrType(StringRef Name, | |||
994 | llvm::DIType *&Cache) { | |||
995 | if (Cache) | |||
996 | return Cache; | |||
997 | Cache = DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, Name, | |||
998 | TheCU, TheCU->getFile(), 0); | |||
999 | unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
1000 | Cache = DBuilder.createPointerType(Cache, Size); | |||
1001 | return Cache; | |||
1002 | } | |||
1003 | ||||
1004 | uint64_t CGDebugInfo::collectDefaultElementTypesForBlockPointer( | |||
1005 | const BlockPointerType *Ty, llvm::DIFile *Unit, llvm::DIDerivedType *DescTy, | |||
1006 | unsigned LineNo, SmallVectorImpl<llvm::Metadata *> &EltTys) { | |||
1007 | QualType FType; | |||
1008 | ||||
1009 | // Advanced by calls to CreateMemberType in increments of FType, then | |||
1010 | // returned as the overall size of the default elements. | |||
1011 | uint64_t FieldOffset = 0; | |||
1012 | ||||
1013 | // Blocks in OpenCL have unique constraints which make the standard fields | |||
1014 | // redundant while requiring size and align fields for enqueue_kernel. See | |||
1015 | // initializeForBlockHeader in CGBlocks.cpp | |||
1016 | if (CGM.getLangOpts().OpenCL) { | |||
1017 | FType = CGM.getContext().IntTy; | |||
1018 | EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset)); | |||
1019 | EltTys.push_back(CreateMemberType(Unit, FType, "__align", &FieldOffset)); | |||
1020 | } else { | |||
1021 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
1022 | EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset)); | |||
1023 | FType = CGM.getContext().IntTy; | |||
1024 | EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset)); | |||
1025 | EltTys.push_back(CreateMemberType(Unit, FType, "__reserved", &FieldOffset)); | |||
1026 | FType = CGM.getContext().getPointerType(Ty->getPointeeType()); | |||
1027 | EltTys.push_back(CreateMemberType(Unit, FType, "__FuncPtr", &FieldOffset)); | |||
1028 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
1029 | uint64_t FieldSize = CGM.getContext().getTypeSize(Ty); | |||
1030 | uint32_t FieldAlign = CGM.getContext().getTypeAlign(Ty); | |||
1031 | EltTys.push_back(DBuilder.createMemberType( | |||
1032 | Unit, "__descriptor", nullptr, LineNo, FieldSize, FieldAlign, | |||
1033 | FieldOffset, llvm::DINode::FlagZero, DescTy)); | |||
1034 | FieldOffset += FieldSize; | |||
1035 | } | |||
1036 | ||||
1037 | return FieldOffset; | |||
1038 | } | |||
1039 | ||||
1040 | llvm::DIType *CGDebugInfo::CreateType(const BlockPointerType *Ty, | |||
1041 | llvm::DIFile *Unit) { | |||
1042 | SmallVector<llvm::Metadata *, 8> EltTys; | |||
1043 | QualType FType; | |||
1044 | uint64_t FieldOffset; | |||
1045 | llvm::DINodeArray Elements; | |||
1046 | ||||
1047 | FieldOffset = 0; | |||
1048 | FType = CGM.getContext().UnsignedLongTy; | |||
1049 | EltTys.push_back(CreateMemberType(Unit, FType, "reserved", &FieldOffset)); | |||
1050 | EltTys.push_back(CreateMemberType(Unit, FType, "Size", &FieldOffset)); | |||
1051 | ||||
1052 | Elements = DBuilder.getOrCreateArray(EltTys); | |||
1053 | EltTys.clear(); | |||
1054 | ||||
1055 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagAppleBlock; | |||
1056 | ||||
1057 | auto *EltTy = | |||
1058 | DBuilder.createStructType(Unit, "__block_descriptor", nullptr, 0, | |||
1059 | FieldOffset, 0, Flags, nullptr, Elements); | |||
1060 | ||||
1061 | // Bit size, align and offset of the type. | |||
1062 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
1063 | ||||
1064 | auto *DescTy = DBuilder.createPointerType(EltTy, Size); | |||
1065 | ||||
1066 | FieldOffset = collectDefaultElementTypesForBlockPointer(Ty, Unit, DescTy, | |||
1067 | 0, EltTys); | |||
1068 | ||||
1069 | Elements = DBuilder.getOrCreateArray(EltTys); | |||
1070 | ||||
1071 | // The __block_literal_generic structs are marked with a special | |||
1072 | // DW_AT_APPLE_BLOCK attribute and are an implementation detail only | |||
1073 | // the debugger needs to know about. To allow type uniquing, emit | |||
1074 | // them without a name or a location. | |||
1075 | EltTy = DBuilder.createStructType(Unit, "", nullptr, 0, FieldOffset, 0, | |||
1076 | Flags, nullptr, Elements); | |||
1077 | ||||
1078 | return DBuilder.createPointerType(EltTy, Size); | |||
1079 | } | |||
1080 | ||||
1081 | llvm::DIType *CGDebugInfo::CreateType(const TemplateSpecializationType *Ty, | |||
1082 | llvm::DIFile *Unit) { | |||
1083 | assert(Ty->isTypeAlias())((Ty->isTypeAlias()) ? static_cast<void> (0) : __assert_fail ("Ty->isTypeAlias()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1083, __PRETTY_FUNCTION__)); | |||
1084 | llvm::DIType *Src = getOrCreateType(Ty->getAliasedType(), Unit); | |||
1085 | ||||
1086 | SmallString<128> NS; | |||
1087 | llvm::raw_svector_ostream OS(NS); | |||
1088 | Ty->getTemplateName().print(OS, getPrintingPolicy(), /*qualified*/ false); | |||
1089 | printTemplateArgumentList(OS, Ty->template_arguments(), getPrintingPolicy()); | |||
1090 | ||||
1091 | auto *AliasDecl = | |||
1092 | cast<TypeAliasTemplateDecl>(Ty->getTemplateName().getAsTemplateDecl()) | |||
1093 | ->getTemplatedDecl(); | |||
1094 | ||||
1095 | SourceLocation Loc = AliasDecl->getLocation(); | |||
1096 | return DBuilder.createTypedef(Src, OS.str(), getOrCreateFile(Loc), | |||
1097 | getLineNumber(Loc), | |||
1098 | getDeclContextDescriptor(AliasDecl)); | |||
1099 | } | |||
1100 | ||||
1101 | llvm::DIType *CGDebugInfo::CreateType(const TypedefType *Ty, | |||
1102 | llvm::DIFile *Unit) { | |||
1103 | // We don't set size information, but do specify where the typedef was | |||
1104 | // declared. | |||
1105 | SourceLocation Loc = Ty->getDecl()->getLocation(); | |||
1106 | ||||
1107 | // Typedefs are derived from some other type. | |||
1108 | return DBuilder.createTypedef( | |||
1109 | getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit), | |||
1110 | Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc), | |||
1111 | getDeclContextDescriptor(Ty->getDecl())); | |||
1112 | } | |||
1113 | ||||
1114 | static unsigned getDwarfCC(CallingConv CC) { | |||
1115 | switch (CC) { | |||
1116 | case CC_C: | |||
1117 | // Avoid emitting DW_AT_calling_convention if the C convention was used. | |||
1118 | return 0; | |||
1119 | ||||
1120 | case CC_X86StdCall: | |||
1121 | return llvm::dwarf::DW_CC_BORLAND_stdcall; | |||
1122 | case CC_X86FastCall: | |||
1123 | return llvm::dwarf::DW_CC_BORLAND_msfastcall; | |||
1124 | case CC_X86ThisCall: | |||
1125 | return llvm::dwarf::DW_CC_BORLAND_thiscall; | |||
1126 | case CC_X86VectorCall: | |||
1127 | return llvm::dwarf::DW_CC_LLVM_vectorcall; | |||
1128 | case CC_X86Pascal: | |||
1129 | return llvm::dwarf::DW_CC_BORLAND_pascal; | |||
1130 | case CC_Win64: | |||
1131 | return llvm::dwarf::DW_CC_LLVM_Win64; | |||
1132 | case CC_X86_64SysV: | |||
1133 | return llvm::dwarf::DW_CC_LLVM_X86_64SysV; | |||
1134 | case CC_AAPCS: | |||
1135 | case CC_AArch64VectorCall: | |||
1136 | return llvm::dwarf::DW_CC_LLVM_AAPCS; | |||
1137 | case CC_AAPCS_VFP: | |||
1138 | return llvm::dwarf::DW_CC_LLVM_AAPCS_VFP; | |||
1139 | case CC_IntelOclBicc: | |||
1140 | return llvm::dwarf::DW_CC_LLVM_IntelOclBicc; | |||
1141 | case CC_SpirFunction: | |||
1142 | return llvm::dwarf::DW_CC_LLVM_SpirFunction; | |||
1143 | case CC_OpenCLKernel: | |||
1144 | return llvm::dwarf::DW_CC_LLVM_OpenCLKernel; | |||
1145 | case CC_Swift: | |||
1146 | return llvm::dwarf::DW_CC_LLVM_Swift; | |||
1147 | case CC_PreserveMost: | |||
1148 | return llvm::dwarf::DW_CC_LLVM_PreserveMost; | |||
1149 | case CC_PreserveAll: | |||
1150 | return llvm::dwarf::DW_CC_LLVM_PreserveAll; | |||
1151 | case CC_X86RegCall: | |||
1152 | return llvm::dwarf::DW_CC_LLVM_X86RegCall; | |||
1153 | } | |||
1154 | return 0; | |||
1155 | } | |||
1156 | ||||
1157 | llvm::DIType *CGDebugInfo::CreateType(const FunctionType *Ty, | |||
1158 | llvm::DIFile *Unit) { | |||
1159 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
1160 | ||||
1161 | // Add the result type at least. | |||
1162 | EltTys.push_back(getOrCreateType(Ty->getReturnType(), Unit)); | |||
1163 | ||||
1164 | // Set up remainder of arguments if there is a prototype. | |||
1165 | // otherwise emit it as a variadic function. | |||
1166 | if (isa<FunctionNoProtoType>(Ty)) | |||
1167 | EltTys.push_back(DBuilder.createUnspecifiedParameter()); | |||
1168 | else if (const auto *FPT = dyn_cast<FunctionProtoType>(Ty)) { | |||
1169 | for (const QualType &ParamType : FPT->param_types()) | |||
1170 | EltTys.push_back(getOrCreateType(ParamType, Unit)); | |||
1171 | if (FPT->isVariadic()) | |||
1172 | EltTys.push_back(DBuilder.createUnspecifiedParameter()); | |||
1173 | } | |||
1174 | ||||
1175 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys); | |||
1176 | return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero, | |||
1177 | getDwarfCC(Ty->getCallConv())); | |||
1178 | } | |||
1179 | ||||
1180 | /// Convert an AccessSpecifier into the corresponding DINode flag. | |||
1181 | /// As an optimization, return 0 if the access specifier equals the | |||
1182 | /// default for the containing type. | |||
1183 | static llvm::DINode::DIFlags getAccessFlag(AccessSpecifier Access, | |||
1184 | const RecordDecl *RD) { | |||
1185 | AccessSpecifier Default = clang::AS_none; | |||
1186 | if (RD && RD->isClass()) | |||
1187 | Default = clang::AS_private; | |||
1188 | else if (RD && (RD->isStruct() || RD->isUnion())) | |||
1189 | Default = clang::AS_public; | |||
1190 | ||||
1191 | if (Access == Default) | |||
1192 | return llvm::DINode::FlagZero; | |||
1193 | ||||
1194 | switch (Access) { | |||
1195 | case clang::AS_private: | |||
1196 | return llvm::DINode::FlagPrivate; | |||
1197 | case clang::AS_protected: | |||
1198 | return llvm::DINode::FlagProtected; | |||
1199 | case clang::AS_public: | |||
1200 | return llvm::DINode::FlagPublic; | |||
1201 | case clang::AS_none: | |||
1202 | return llvm::DINode::FlagZero; | |||
1203 | } | |||
1204 | llvm_unreachable("unexpected access enumerator")::llvm::llvm_unreachable_internal("unexpected access enumerator" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1204); | |||
1205 | } | |||
1206 | ||||
1207 | llvm::DIType *CGDebugInfo::createBitFieldType(const FieldDecl *BitFieldDecl, | |||
1208 | llvm::DIScope *RecordTy, | |||
1209 | const RecordDecl *RD) { | |||
1210 | StringRef Name = BitFieldDecl->getName(); | |||
1211 | QualType Ty = BitFieldDecl->getType(); | |||
1212 | SourceLocation Loc = BitFieldDecl->getLocation(); | |||
1213 | llvm::DIFile *VUnit = getOrCreateFile(Loc); | |||
1214 | llvm::DIType *DebugType = getOrCreateType(Ty, VUnit); | |||
1215 | ||||
1216 | // Get the location for the field. | |||
1217 | llvm::DIFile *File = getOrCreateFile(Loc); | |||
1218 | unsigned Line = getLineNumber(Loc); | |||
1219 | ||||
1220 | const CGBitFieldInfo &BitFieldInfo = | |||
1221 | CGM.getTypes().getCGRecordLayout(RD).getBitFieldInfo(BitFieldDecl); | |||
1222 | uint64_t SizeInBits = BitFieldInfo.Size; | |||
1223 | assert(SizeInBits > 0 && "found named 0-width bitfield")((SizeInBits > 0 && "found named 0-width bitfield" ) ? static_cast<void> (0) : __assert_fail ("SizeInBits > 0 && \"found named 0-width bitfield\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1223, __PRETTY_FUNCTION__)); | |||
1224 | uint64_t StorageOffsetInBits = | |||
1225 | CGM.getContext().toBits(BitFieldInfo.StorageOffset); | |||
1226 | uint64_t Offset = BitFieldInfo.Offset; | |||
1227 | // The bit offsets for big endian machines are reversed for big | |||
1228 | // endian target, compensate for that as the DIDerivedType requires | |||
1229 | // un-reversed offsets. | |||
1230 | if (CGM.getDataLayout().isBigEndian()) | |||
1231 | Offset = BitFieldInfo.StorageSize - BitFieldInfo.Size - Offset; | |||
1232 | uint64_t OffsetInBits = StorageOffsetInBits + Offset; | |||
1233 | llvm::DINode::DIFlags Flags = getAccessFlag(BitFieldDecl->getAccess(), RD); | |||
1234 | return DBuilder.createBitFieldMemberType( | |||
1235 | RecordTy, Name, File, Line, SizeInBits, OffsetInBits, StorageOffsetInBits, | |||
1236 | Flags, DebugType); | |||
1237 | } | |||
1238 | ||||
1239 | llvm::DIType * | |||
1240 | CGDebugInfo::createFieldType(StringRef name, QualType type, SourceLocation loc, | |||
1241 | AccessSpecifier AS, uint64_t offsetInBits, | |||
1242 | uint32_t AlignInBits, llvm::DIFile *tunit, | |||
1243 | llvm::DIScope *scope, const RecordDecl *RD) { | |||
1244 | llvm::DIType *debugType = getOrCreateType(type, tunit); | |||
1245 | ||||
1246 | // Get the location for the field. | |||
1247 | llvm::DIFile *file = getOrCreateFile(loc); | |||
1248 | unsigned line = getLineNumber(loc); | |||
1249 | ||||
1250 | uint64_t SizeInBits = 0; | |||
1251 | auto Align = AlignInBits; | |||
1252 | if (!type->isIncompleteArrayType()) { | |||
1253 | TypeInfo TI = CGM.getContext().getTypeInfo(type); | |||
1254 | SizeInBits = TI.Width; | |||
1255 | if (!Align) | |||
1256 | Align = getTypeAlignIfRequired(type, CGM.getContext()); | |||
1257 | } | |||
1258 | ||||
1259 | llvm::DINode::DIFlags flags = getAccessFlag(AS, RD); | |||
1260 | return DBuilder.createMemberType(scope, name, file, line, SizeInBits, Align, | |||
1261 | offsetInBits, flags, debugType); | |||
1262 | } | |||
1263 | ||||
1264 | void CGDebugInfo::CollectRecordLambdaFields( | |||
1265 | const CXXRecordDecl *CXXDecl, SmallVectorImpl<llvm::Metadata *> &elements, | |||
1266 | llvm::DIType *RecordTy) { | |||
1267 | // For C++11 Lambdas a Field will be the same as a Capture, but the Capture | |||
1268 | // has the name and the location of the variable so we should iterate over | |||
1269 | // both concurrently. | |||
1270 | const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(CXXDecl); | |||
1271 | RecordDecl::field_iterator Field = CXXDecl->field_begin(); | |||
1272 | unsigned fieldno = 0; | |||
1273 | for (CXXRecordDecl::capture_const_iterator I = CXXDecl->captures_begin(), | |||
1274 | E = CXXDecl->captures_end(); | |||
1275 | I != E; ++I, ++Field, ++fieldno) { | |||
1276 | const LambdaCapture &C = *I; | |||
1277 | if (C.capturesVariable()) { | |||
1278 | SourceLocation Loc = C.getLocation(); | |||
1279 | assert(!Field->isBitField() && "lambdas don't have bitfield members!")((!Field->isBitField() && "lambdas don't have bitfield members!" ) ? static_cast<void> (0) : __assert_fail ("!Field->isBitField() && \"lambdas don't have bitfield members!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1279, __PRETTY_FUNCTION__)); | |||
1280 | VarDecl *V = C.getCapturedVar(); | |||
1281 | StringRef VName = V->getName(); | |||
1282 | llvm::DIFile *VUnit = getOrCreateFile(Loc); | |||
1283 | auto Align = getDeclAlignIfRequired(V, CGM.getContext()); | |||
1284 | llvm::DIType *FieldType = createFieldType( | |||
1285 | VName, Field->getType(), Loc, Field->getAccess(), | |||
1286 | layout.getFieldOffset(fieldno), Align, VUnit, RecordTy, CXXDecl); | |||
1287 | elements.push_back(FieldType); | |||
1288 | } else if (C.capturesThis()) { | |||
1289 | // TODO: Need to handle 'this' in some way by probably renaming the | |||
1290 | // this of the lambda class and having a field member of 'this' or | |||
1291 | // by using AT_object_pointer for the function and having that be | |||
1292 | // used as 'this' for semantic references. | |||
1293 | FieldDecl *f = *Field; | |||
1294 | llvm::DIFile *VUnit = getOrCreateFile(f->getLocation()); | |||
1295 | QualType type = f->getType(); | |||
1296 | llvm::DIType *fieldType = createFieldType( | |||
1297 | "this", type, f->getLocation(), f->getAccess(), | |||
1298 | layout.getFieldOffset(fieldno), VUnit, RecordTy, CXXDecl); | |||
1299 | ||||
1300 | elements.push_back(fieldType); | |||
1301 | } | |||
1302 | } | |||
1303 | } | |||
1304 | ||||
1305 | llvm::DIDerivedType * | |||
1306 | CGDebugInfo::CreateRecordStaticField(const VarDecl *Var, llvm::DIType *RecordTy, | |||
1307 | const RecordDecl *RD) { | |||
1308 | // Create the descriptor for the static variable, with or without | |||
1309 | // constant initializers. | |||
1310 | Var = Var->getCanonicalDecl(); | |||
1311 | llvm::DIFile *VUnit = getOrCreateFile(Var->getLocation()); | |||
1312 | llvm::DIType *VTy = getOrCreateType(Var->getType(), VUnit); | |||
1313 | ||||
1314 | unsigned LineNumber = getLineNumber(Var->getLocation()); | |||
1315 | StringRef VName = Var->getName(); | |||
1316 | llvm::Constant *C = nullptr; | |||
1317 | if (Var->getInit()) { | |||
1318 | const APValue *Value = Var->evaluateValue(); | |||
1319 | if (Value) { | |||
1320 | if (Value->isInt()) | |||
1321 | C = llvm::ConstantInt::get(CGM.getLLVMContext(), Value->getInt()); | |||
1322 | if (Value->isFloat()) | |||
1323 | C = llvm::ConstantFP::get(CGM.getLLVMContext(), Value->getFloat()); | |||
1324 | } | |||
1325 | } | |||
1326 | ||||
1327 | llvm::DINode::DIFlags Flags = getAccessFlag(Var->getAccess(), RD); | |||
1328 | auto Align = getDeclAlignIfRequired(Var, CGM.getContext()); | |||
1329 | llvm::DIDerivedType *GV = DBuilder.createStaticMemberType( | |||
1330 | RecordTy, VName, VUnit, LineNumber, VTy, Flags, C, Align); | |||
1331 | StaticDataMemberCache[Var->getCanonicalDecl()].reset(GV); | |||
1332 | return GV; | |||
1333 | } | |||
1334 | ||||
1335 | void CGDebugInfo::CollectRecordNormalField( | |||
1336 | const FieldDecl *field, uint64_t OffsetInBits, llvm::DIFile *tunit, | |||
1337 | SmallVectorImpl<llvm::Metadata *> &elements, llvm::DIType *RecordTy, | |||
1338 | const RecordDecl *RD) { | |||
1339 | StringRef name = field->getName(); | |||
1340 | QualType type = field->getType(); | |||
1341 | ||||
1342 | // Ignore unnamed fields unless they're anonymous structs/unions. | |||
1343 | if (name.empty() && !type->isRecordType()) | |||
1344 | return; | |||
1345 | ||||
1346 | llvm::DIType *FieldType; | |||
1347 | if (field->isBitField()) { | |||
1348 | FieldType = createBitFieldType(field, RecordTy, RD); | |||
1349 | } else { | |||
1350 | auto Align = getDeclAlignIfRequired(field, CGM.getContext()); | |||
1351 | FieldType = | |||
1352 | createFieldType(name, type, field->getLocation(), field->getAccess(), | |||
1353 | OffsetInBits, Align, tunit, RecordTy, RD); | |||
1354 | } | |||
1355 | ||||
1356 | elements.push_back(FieldType); | |||
1357 | } | |||
1358 | ||||
1359 | void CGDebugInfo::CollectRecordNestedType( | |||
1360 | const TypeDecl *TD, SmallVectorImpl<llvm::Metadata *> &elements) { | |||
1361 | QualType Ty = CGM.getContext().getTypeDeclType(TD); | |||
1362 | // Injected class names are not considered nested records. | |||
1363 | if (isa<InjectedClassNameType>(Ty)) | |||
1364 | return; | |||
1365 | SourceLocation Loc = TD->getLocation(); | |||
1366 | llvm::DIType *nestedType = getOrCreateType(Ty, getOrCreateFile(Loc)); | |||
1367 | elements.push_back(nestedType); | |||
1368 | } | |||
1369 | ||||
1370 | void CGDebugInfo::CollectRecordFields( | |||
1371 | const RecordDecl *record, llvm::DIFile *tunit, | |||
1372 | SmallVectorImpl<llvm::Metadata *> &elements, | |||
1373 | llvm::DICompositeType *RecordTy) { | |||
1374 | const auto *CXXDecl = dyn_cast<CXXRecordDecl>(record); | |||
1375 | ||||
1376 | if (CXXDecl && CXXDecl->isLambda()) | |||
1377 | CollectRecordLambdaFields(CXXDecl, elements, RecordTy); | |||
1378 | else { | |||
1379 | const ASTRecordLayout &layout = CGM.getContext().getASTRecordLayout(record); | |||
1380 | ||||
1381 | // Field number for non-static fields. | |||
1382 | unsigned fieldNo = 0; | |||
1383 | ||||
1384 | // Static and non-static members should appear in the same order as | |||
1385 | // the corresponding declarations in the source program. | |||
1386 | for (const auto *I : record->decls()) | |||
1387 | if (const auto *V = dyn_cast<VarDecl>(I)) { | |||
1388 | if (V->hasAttr<NoDebugAttr>()) | |||
1389 | continue; | |||
1390 | ||||
1391 | // Skip variable template specializations when emitting CodeView. MSVC | |||
1392 | // doesn't emit them. | |||
1393 | if (CGM.getCodeGenOpts().EmitCodeView && | |||
1394 | isa<VarTemplateSpecializationDecl>(V)) | |||
1395 | continue; | |||
1396 | ||||
1397 | // Reuse the existing static member declaration if one exists | |||
1398 | auto MI = StaticDataMemberCache.find(V->getCanonicalDecl()); | |||
1399 | if (MI != StaticDataMemberCache.end()) { | |||
1400 | assert(MI->second &&((MI->second && "Static data member declaration should still exist" ) ? static_cast<void> (0) : __assert_fail ("MI->second && \"Static data member declaration should still exist\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1401, __PRETTY_FUNCTION__)) | |||
1401 | "Static data member declaration should still exist")((MI->second && "Static data member declaration should still exist" ) ? static_cast<void> (0) : __assert_fail ("MI->second && \"Static data member declaration should still exist\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1401, __PRETTY_FUNCTION__)); | |||
1402 | elements.push_back(MI->second); | |||
1403 | } else { | |||
1404 | auto Field = CreateRecordStaticField(V, RecordTy, record); | |||
1405 | elements.push_back(Field); | |||
1406 | } | |||
1407 | } else if (const auto *field = dyn_cast<FieldDecl>(I)) { | |||
1408 | CollectRecordNormalField(field, layout.getFieldOffset(fieldNo), tunit, | |||
1409 | elements, RecordTy, record); | |||
1410 | ||||
1411 | // Bump field number for next field. | |||
1412 | ++fieldNo; | |||
1413 | } else if (CGM.getCodeGenOpts().EmitCodeView) { | |||
1414 | // Debug info for nested types is included in the member list only for | |||
1415 | // CodeView. | |||
1416 | if (const auto *nestedType = dyn_cast<TypeDecl>(I)) | |||
1417 | if (!nestedType->isImplicit() && | |||
1418 | nestedType->getDeclContext() == record) | |||
1419 | CollectRecordNestedType(nestedType, elements); | |||
1420 | } | |||
1421 | } | |||
1422 | } | |||
1423 | ||||
1424 | llvm::DISubroutineType * | |||
1425 | CGDebugInfo::getOrCreateMethodType(const CXXMethodDecl *Method, | |||
1426 | llvm::DIFile *Unit) { | |||
1427 | const FunctionProtoType *Func = Method->getType()->getAs<FunctionProtoType>(); | |||
1428 | if (Method->isStatic()) | |||
1429 | return cast_or_null<llvm::DISubroutineType>( | |||
1430 | getOrCreateType(QualType(Func, 0), Unit)); | |||
1431 | return getOrCreateInstanceMethodType(Method->getThisType(CGM.getContext()), | |||
1432 | Func, Unit); | |||
1433 | } | |||
1434 | ||||
1435 | llvm::DISubroutineType *CGDebugInfo::getOrCreateInstanceMethodType( | |||
1436 | QualType ThisPtr, const FunctionProtoType *Func, llvm::DIFile *Unit) { | |||
1437 | // Add "this" pointer. | |||
1438 | llvm::DITypeRefArray Args( | |||
1439 | cast<llvm::DISubroutineType>(getOrCreateType(QualType(Func, 0), Unit)) | |||
1440 | ->getTypeArray()); | |||
1441 | assert(Args.size() && "Invalid number of arguments!")((Args.size() && "Invalid number of arguments!") ? static_cast <void> (0) : __assert_fail ("Args.size() && \"Invalid number of arguments!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1441, __PRETTY_FUNCTION__)); | |||
1442 | ||||
1443 | SmallVector<llvm::Metadata *, 16> Elts; | |||
1444 | ||||
1445 | // First element is always return type. For 'void' functions it is NULL. | |||
1446 | Elts.push_back(Args[0]); | |||
1447 | ||||
1448 | // "this" pointer is always first argument. | |||
1449 | const CXXRecordDecl *RD = ThisPtr->getPointeeCXXRecordDecl(); | |||
1450 | if (isa<ClassTemplateSpecializationDecl>(RD)) { | |||
1451 | // Create pointer type directly in this case. | |||
1452 | const PointerType *ThisPtrTy = cast<PointerType>(ThisPtr); | |||
1453 | QualType PointeeTy = ThisPtrTy->getPointeeType(); | |||
1454 | unsigned AS = CGM.getContext().getTargetAddressSpace(PointeeTy); | |||
1455 | uint64_t Size = CGM.getTarget().getPointerWidth(AS); | |||
1456 | auto Align = getTypeAlignIfRequired(ThisPtrTy, CGM.getContext()); | |||
1457 | llvm::DIType *PointeeType = getOrCreateType(PointeeTy, Unit); | |||
1458 | llvm::DIType *ThisPtrType = | |||
1459 | DBuilder.createPointerType(PointeeType, Size, Align); | |||
1460 | TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType); | |||
1461 | // TODO: This and the artificial type below are misleading, the | |||
1462 | // types aren't artificial the argument is, but the current | |||
1463 | // metadata doesn't represent that. | |||
1464 | ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType); | |||
1465 | Elts.push_back(ThisPtrType); | |||
1466 | } else { | |||
1467 | llvm::DIType *ThisPtrType = getOrCreateType(ThisPtr, Unit); | |||
1468 | TypeCache[ThisPtr.getAsOpaquePtr()].reset(ThisPtrType); | |||
1469 | ThisPtrType = DBuilder.createObjectPointerType(ThisPtrType); | |||
1470 | Elts.push_back(ThisPtrType); | |||
1471 | } | |||
1472 | ||||
1473 | // Copy rest of the arguments. | |||
1474 | for (unsigned i = 1, e = Args.size(); i != e; ++i) | |||
1475 | Elts.push_back(Args[i]); | |||
1476 | ||||
1477 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts); | |||
1478 | ||||
1479 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
1480 | if (Func->getExtProtoInfo().RefQualifier == RQ_LValue) | |||
1481 | Flags |= llvm::DINode::FlagLValueReference; | |||
1482 | if (Func->getExtProtoInfo().RefQualifier == RQ_RValue) | |||
1483 | Flags |= llvm::DINode::FlagRValueReference; | |||
1484 | ||||
1485 | return DBuilder.createSubroutineType(EltTypeArray, Flags, | |||
1486 | getDwarfCC(Func->getCallConv())); | |||
1487 | } | |||
1488 | ||||
1489 | /// isFunctionLocalClass - Return true if CXXRecordDecl is defined | |||
1490 | /// inside a function. | |||
1491 | static bool isFunctionLocalClass(const CXXRecordDecl *RD) { | |||
1492 | if (const auto *NRD = dyn_cast<CXXRecordDecl>(RD->getDeclContext())) | |||
1493 | return isFunctionLocalClass(NRD); | |||
1494 | if (isa<FunctionDecl>(RD->getDeclContext())) | |||
1495 | return true; | |||
1496 | return false; | |||
1497 | } | |||
1498 | ||||
1499 | llvm::DISubprogram *CGDebugInfo::CreateCXXMemberFunction( | |||
1500 | const CXXMethodDecl *Method, llvm::DIFile *Unit, llvm::DIType *RecordTy) { | |||
1501 | bool IsCtorOrDtor = | |||
1502 | isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method); | |||
1503 | ||||
1504 | StringRef MethodName = getFunctionName(Method); | |||
1505 | llvm::DISubroutineType *MethodTy = getOrCreateMethodType(Method, Unit); | |||
1506 | ||||
1507 | // Since a single ctor/dtor corresponds to multiple functions, it doesn't | |||
1508 | // make sense to give a single ctor/dtor a linkage name. | |||
1509 | StringRef MethodLinkageName; | |||
1510 | // FIXME: 'isFunctionLocalClass' seems like an arbitrary/unintentional | |||
1511 | // property to use here. It may've been intended to model "is non-external | |||
1512 | // type" but misses cases of non-function-local but non-external classes such | |||
1513 | // as those in anonymous namespaces as well as the reverse - external types | |||
1514 | // that are function local, such as those in (non-local) inline functions. | |||
1515 | if (!IsCtorOrDtor && !isFunctionLocalClass(Method->getParent())) | |||
1516 | MethodLinkageName = CGM.getMangledName(Method); | |||
1517 | ||||
1518 | // Get the location for the method. | |||
1519 | llvm::DIFile *MethodDefUnit = nullptr; | |||
1520 | unsigned MethodLine = 0; | |||
1521 | if (!Method->isImplicit()) { | |||
1522 | MethodDefUnit = getOrCreateFile(Method->getLocation()); | |||
1523 | MethodLine = getLineNumber(Method->getLocation()); | |||
1524 | } | |||
1525 | ||||
1526 | // Collect virtual method info. | |||
1527 | llvm::DIType *ContainingType = nullptr; | |||
1528 | unsigned VIndex = 0; | |||
1529 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
1530 | llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero; | |||
1531 | int ThisAdjustment = 0; | |||
1532 | ||||
1533 | if (Method->isVirtual()) { | |||
1534 | if (Method->isPure()) | |||
1535 | SPFlags |= llvm::DISubprogram::SPFlagPureVirtual; | |||
1536 | else | |||
1537 | SPFlags |= llvm::DISubprogram::SPFlagVirtual; | |||
1538 | ||||
1539 | if (CGM.getTarget().getCXXABI().isItaniumFamily()) { | |||
1540 | // It doesn't make sense to give a virtual destructor a vtable index, | |||
1541 | // since a single destructor has two entries in the vtable. | |||
1542 | if (!isa<CXXDestructorDecl>(Method)) | |||
1543 | VIndex = CGM.getItaniumVTableContext().getMethodVTableIndex(Method); | |||
1544 | } else { | |||
1545 | // Emit MS ABI vftable information. There is only one entry for the | |||
1546 | // deleting dtor. | |||
1547 | const auto *DD = dyn_cast<CXXDestructorDecl>(Method); | |||
1548 | GlobalDecl GD = DD ? GlobalDecl(DD, Dtor_Deleting) : GlobalDecl(Method); | |||
1549 | MethodVFTableLocation ML = | |||
1550 | CGM.getMicrosoftVTableContext().getMethodVFTableLocation(GD); | |||
1551 | VIndex = ML.Index; | |||
1552 | ||||
1553 | // CodeView only records the vftable offset in the class that introduces | |||
1554 | // the virtual method. This is possible because, unlike Itanium, the MS | |||
1555 | // C++ ABI does not include all virtual methods from non-primary bases in | |||
1556 | // the vtable for the most derived class. For example, if C inherits from | |||
1557 | // A and B, C's primary vftable will not include B's virtual methods. | |||
1558 | if (Method->size_overridden_methods() == 0) | |||
1559 | Flags |= llvm::DINode::FlagIntroducedVirtual; | |||
1560 | ||||
1561 | // The 'this' adjustment accounts for both the virtual and non-virtual | |||
1562 | // portions of the adjustment. Presumably the debugger only uses it when | |||
1563 | // it knows the dynamic type of an object. | |||
1564 | ThisAdjustment = CGM.getCXXABI() | |||
1565 | .getVirtualFunctionPrologueThisAdjustment(GD) | |||
1566 | .getQuantity(); | |||
1567 | } | |||
1568 | ContainingType = RecordTy; | |||
1569 | } | |||
1570 | ||||
1571 | if (Method->isStatic()) | |||
1572 | Flags |= llvm::DINode::FlagStaticMember; | |||
1573 | if (Method->isImplicit()) | |||
1574 | Flags |= llvm::DINode::FlagArtificial; | |||
1575 | Flags |= getAccessFlag(Method->getAccess(), Method->getParent()); | |||
1576 | if (const auto *CXXC = dyn_cast<CXXConstructorDecl>(Method)) { | |||
1577 | if (CXXC->isExplicit()) | |||
1578 | Flags |= llvm::DINode::FlagExplicit; | |||
1579 | } else if (const auto *CXXC = dyn_cast<CXXConversionDecl>(Method)) { | |||
1580 | if (CXXC->isExplicit()) | |||
1581 | Flags |= llvm::DINode::FlagExplicit; | |||
1582 | } | |||
1583 | if (Method->hasPrototype()) | |||
1584 | Flags |= llvm::DINode::FlagPrototyped; | |||
1585 | if (Method->getRefQualifier() == RQ_LValue) | |||
1586 | Flags |= llvm::DINode::FlagLValueReference; | |||
1587 | if (Method->getRefQualifier() == RQ_RValue) | |||
1588 | Flags |= llvm::DINode::FlagRValueReference; | |||
1589 | if (CGM.getLangOpts().Optimize) | |||
1590 | SPFlags |= llvm::DISubprogram::SPFlagOptimized; | |||
1591 | ||||
1592 | llvm::DINodeArray TParamsArray = CollectFunctionTemplateParams(Method, Unit); | |||
1593 | llvm::DISubprogram *SP = DBuilder.createMethod( | |||
1594 | RecordTy, MethodName, MethodLinkageName, MethodDefUnit, MethodLine, | |||
1595 | MethodTy, VIndex, ThisAdjustment, ContainingType, Flags, SPFlags, | |||
1596 | TParamsArray.get()); | |||
1597 | ||||
1598 | SPCache[Method->getCanonicalDecl()].reset(SP); | |||
1599 | ||||
1600 | return SP; | |||
1601 | } | |||
1602 | ||||
1603 | void CGDebugInfo::CollectCXXMemberFunctions( | |||
1604 | const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1605 | SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy) { | |||
1606 | ||||
1607 | // Since we want more than just the individual member decls if we | |||
1608 | // have templated functions iterate over every declaration to gather | |||
1609 | // the functions. | |||
1610 | for (const auto *I : RD->decls()) { | |||
1611 | const auto *Method = dyn_cast<CXXMethodDecl>(I); | |||
1612 | // If the member is implicit, don't add it to the member list. This avoids | |||
1613 | // the member being added to type units by LLVM, while still allowing it | |||
1614 | // to be emitted into the type declaration/reference inside the compile | |||
1615 | // unit. | |||
1616 | // Ditto 'nodebug' methods, for consistency with CodeGenFunction.cpp. | |||
1617 | // FIXME: Handle Using(Shadow?)Decls here to create | |||
1618 | // DW_TAG_imported_declarations inside the class for base decls brought into | |||
1619 | // derived classes. GDB doesn't seem to notice/leverage these when I tried | |||
1620 | // it, so I'm not rushing to fix this. (GCC seems to produce them, if | |||
1621 | // referenced) | |||
1622 | if (!Method || Method->isImplicit() || Method->hasAttr<NoDebugAttr>()) | |||
1623 | continue; | |||
1624 | ||||
1625 | if (Method->getType()->getAs<FunctionProtoType>()->getContainedAutoType()) | |||
1626 | continue; | |||
1627 | ||||
1628 | // Reuse the existing member function declaration if it exists. | |||
1629 | // It may be associated with the declaration of the type & should be | |||
1630 | // reused as we're building the definition. | |||
1631 | // | |||
1632 | // This situation can arise in the vtable-based debug info reduction where | |||
1633 | // implicit members are emitted in a non-vtable TU. | |||
1634 | auto MI = SPCache.find(Method->getCanonicalDecl()); | |||
1635 | EltTys.push_back(MI == SPCache.end() | |||
1636 | ? CreateCXXMemberFunction(Method, Unit, RecordTy) | |||
1637 | : static_cast<llvm::Metadata *>(MI->second)); | |||
1638 | } | |||
1639 | } | |||
1640 | ||||
1641 | void CGDebugInfo::CollectCXXBases(const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1642 | SmallVectorImpl<llvm::Metadata *> &EltTys, | |||
1643 | llvm::DIType *RecordTy) { | |||
1644 | llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> SeenTypes; | |||
1645 | CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->bases(), SeenTypes, | |||
1646 | llvm::DINode::FlagZero); | |||
1647 | ||||
1648 | // If we are generating CodeView debug info, we also need to emit records for | |||
1649 | // indirect virtual base classes. | |||
1650 | if (CGM.getCodeGenOpts().EmitCodeView) { | |||
1651 | CollectCXXBasesAux(RD, Unit, EltTys, RecordTy, RD->vbases(), SeenTypes, | |||
1652 | llvm::DINode::FlagIndirectVirtualBase); | |||
1653 | } | |||
1654 | } | |||
1655 | ||||
1656 | void CGDebugInfo::CollectCXXBasesAux( | |||
1657 | const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1658 | SmallVectorImpl<llvm::Metadata *> &EltTys, llvm::DIType *RecordTy, | |||
1659 | const CXXRecordDecl::base_class_const_range &Bases, | |||
1660 | llvm::DenseSet<CanonicalDeclPtr<const CXXRecordDecl>> &SeenTypes, | |||
1661 | llvm::DINode::DIFlags StartingFlags) { | |||
1662 | const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD); | |||
1663 | for (const auto &BI : Bases) { | |||
1664 | const auto *Base = | |||
1665 | cast<CXXRecordDecl>(BI.getType()->getAs<RecordType>()->getDecl()); | |||
1666 | if (!SeenTypes.insert(Base).second) | |||
1667 | continue; | |||
1668 | auto *BaseTy = getOrCreateType(BI.getType(), Unit); | |||
1669 | llvm::DINode::DIFlags BFlags = StartingFlags; | |||
1670 | uint64_t BaseOffset; | |||
1671 | uint32_t VBPtrOffset = 0; | |||
1672 | ||||
1673 | if (BI.isVirtual()) { | |||
1674 | if (CGM.getTarget().getCXXABI().isItaniumFamily()) { | |||
1675 | // virtual base offset offset is -ve. The code generator emits dwarf | |||
1676 | // expression where it expects +ve number. | |||
1677 | BaseOffset = 0 - CGM.getItaniumVTableContext() | |||
1678 | .getVirtualBaseOffsetOffset(RD, Base) | |||
1679 | .getQuantity(); | |||
1680 | } else { | |||
1681 | // In the MS ABI, store the vbtable offset, which is analogous to the | |||
1682 | // vbase offset offset in Itanium. | |||
1683 | BaseOffset = | |||
1684 | 4 * CGM.getMicrosoftVTableContext().getVBTableIndex(RD, Base); | |||
1685 | VBPtrOffset = CGM.getContext() | |||
1686 | .getASTRecordLayout(RD) | |||
1687 | .getVBPtrOffset() | |||
1688 | .getQuantity(); | |||
1689 | } | |||
1690 | BFlags |= llvm::DINode::FlagVirtual; | |||
1691 | } else | |||
1692 | BaseOffset = CGM.getContext().toBits(RL.getBaseClassOffset(Base)); | |||
1693 | // FIXME: Inconsistent units for BaseOffset. It is in bytes when | |||
1694 | // BI->isVirtual() and bits when not. | |||
1695 | ||||
1696 | BFlags |= getAccessFlag(BI.getAccessSpecifier(), RD); | |||
1697 | llvm::DIType *DTy = DBuilder.createInheritance(RecordTy, BaseTy, BaseOffset, | |||
1698 | VBPtrOffset, BFlags); | |||
1699 | EltTys.push_back(DTy); | |||
1700 | } | |||
1701 | } | |||
1702 | ||||
1703 | llvm::DINodeArray | |||
1704 | CGDebugInfo::CollectTemplateParams(const TemplateParameterList *TPList, | |||
1705 | ArrayRef<TemplateArgument> TAList, | |||
1706 | llvm::DIFile *Unit) { | |||
1707 | SmallVector<llvm::Metadata *, 16> TemplateParams; | |||
1708 | for (unsigned i = 0, e = TAList.size(); i != e; ++i) { | |||
1709 | const TemplateArgument &TA = TAList[i]; | |||
1710 | StringRef Name; | |||
1711 | if (TPList) | |||
1712 | Name = TPList->getParam(i)->getName(); | |||
1713 | switch (TA.getKind()) { | |||
1714 | case TemplateArgument::Type: { | |||
1715 | llvm::DIType *TTy = getOrCreateType(TA.getAsType(), Unit); | |||
1716 | TemplateParams.push_back( | |||
1717 | DBuilder.createTemplateTypeParameter(TheCU, Name, TTy)); | |||
1718 | } break; | |||
1719 | case TemplateArgument::Integral: { | |||
1720 | llvm::DIType *TTy = getOrCreateType(TA.getIntegralType(), Unit); | |||
1721 | TemplateParams.push_back(DBuilder.createTemplateValueParameter( | |||
1722 | TheCU, Name, TTy, | |||
1723 | llvm::ConstantInt::get(CGM.getLLVMContext(), TA.getAsIntegral()))); | |||
1724 | } break; | |||
1725 | case TemplateArgument::Declaration: { | |||
1726 | const ValueDecl *D = TA.getAsDecl(); | |||
1727 | QualType T = TA.getParamTypeForDecl().getDesugaredType(CGM.getContext()); | |||
1728 | llvm::DIType *TTy = getOrCreateType(T, Unit); | |||
1729 | llvm::Constant *V = nullptr; | |||
1730 | const CXXMethodDecl *MD; | |||
1731 | // Variable pointer template parameters have a value that is the address | |||
1732 | // of the variable. | |||
1733 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
1734 | V = CGM.GetAddrOfGlobalVar(VD); | |||
1735 | // Member function pointers have special support for building them, though | |||
1736 | // this is currently unsupported in LLVM CodeGen. | |||
1737 | else if ((MD = dyn_cast<CXXMethodDecl>(D)) && MD->isInstance()) | |||
1738 | V = CGM.getCXXABI().EmitMemberFunctionPointer(MD); | |||
1739 | else if (const auto *FD = dyn_cast<FunctionDecl>(D)) | |||
1740 | V = CGM.GetAddrOfFunction(FD); | |||
1741 | // Member data pointers have special handling too to compute the fixed | |||
1742 | // offset within the object. | |||
1743 | else if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr())) { | |||
1744 | // These five lines (& possibly the above member function pointer | |||
1745 | // handling) might be able to be refactored to use similar code in | |||
1746 | // CodeGenModule::getMemberPointerConstant | |||
1747 | uint64_t fieldOffset = CGM.getContext().getFieldOffset(D); | |||
1748 | CharUnits chars = | |||
1749 | CGM.getContext().toCharUnitsFromBits((int64_t)fieldOffset); | |||
1750 | V = CGM.getCXXABI().EmitMemberDataPointer(MPT, chars); | |||
1751 | } | |||
1752 | TemplateParams.push_back(DBuilder.createTemplateValueParameter( | |||
1753 | TheCU, Name, TTy, | |||
1754 | cast_or_null<llvm::Constant>(V->stripPointerCasts()))); | |||
| ||||
1755 | } break; | |||
1756 | case TemplateArgument::NullPtr: { | |||
1757 | QualType T = TA.getNullPtrType(); | |||
1758 | llvm::DIType *TTy = getOrCreateType(T, Unit); | |||
1759 | llvm::Constant *V = nullptr; | |||
1760 | // Special case member data pointer null values since they're actually -1 | |||
1761 | // instead of zero. | |||
1762 | if (const auto *MPT = dyn_cast<MemberPointerType>(T.getTypePtr())) | |||
1763 | // But treat member function pointers as simple zero integers because | |||
1764 | // it's easier than having a special case in LLVM's CodeGen. If LLVM | |||
1765 | // CodeGen grows handling for values of non-null member function | |||
1766 | // pointers then perhaps we could remove this special case and rely on | |||
1767 | // EmitNullMemberPointer for member function pointers. | |||
1768 | if (MPT->isMemberDataPointer()) | |||
1769 | V = CGM.getCXXABI().EmitNullMemberPointer(MPT); | |||
1770 | if (!V) | |||
1771 | V = llvm::ConstantInt::get(CGM.Int8Ty, 0); | |||
1772 | TemplateParams.push_back( | |||
1773 | DBuilder.createTemplateValueParameter(TheCU, Name, TTy, V)); | |||
1774 | } break; | |||
1775 | case TemplateArgument::Template: | |||
1776 | TemplateParams.push_back(DBuilder.createTemplateTemplateParameter( | |||
1777 | TheCU, Name, nullptr, | |||
1778 | TA.getAsTemplate().getAsTemplateDecl()->getQualifiedNameAsString())); | |||
1779 | break; | |||
1780 | case TemplateArgument::Pack: | |||
1781 | TemplateParams.push_back(DBuilder.createTemplateParameterPack( | |||
1782 | TheCU, Name, nullptr, | |||
1783 | CollectTemplateParams(nullptr, TA.getPackAsArray(), Unit))); | |||
1784 | break; | |||
1785 | case TemplateArgument::Expression: { | |||
1786 | const Expr *E = TA.getAsExpr(); | |||
1787 | QualType T = E->getType(); | |||
1788 | if (E->isGLValue()) | |||
1789 | T = CGM.getContext().getLValueReferenceType(T); | |||
1790 | llvm::Constant *V = ConstantEmitter(CGM).emitAbstract(E, T); | |||
1791 | assert(V && "Expression in template argument isn't constant")((V && "Expression in template argument isn't constant" ) ? static_cast<void> (0) : __assert_fail ("V && \"Expression in template argument isn't constant\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1791, __PRETTY_FUNCTION__)); | |||
1792 | llvm::DIType *TTy = getOrCreateType(T, Unit); | |||
1793 | TemplateParams.push_back(DBuilder.createTemplateValueParameter( | |||
1794 | TheCU, Name, TTy, V->stripPointerCasts())); | |||
1795 | } break; | |||
1796 | // And the following should never occur: | |||
1797 | case TemplateArgument::TemplateExpansion: | |||
1798 | case TemplateArgument::Null: | |||
1799 | llvm_unreachable(::llvm::llvm_unreachable_internal("These argument types shouldn't exist in concrete types" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1800) | |||
1800 | "These argument types shouldn't exist in concrete types")::llvm::llvm_unreachable_internal("These argument types shouldn't exist in concrete types" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1800); | |||
1801 | } | |||
1802 | } | |||
1803 | return DBuilder.getOrCreateArray(TemplateParams); | |||
1804 | } | |||
1805 | ||||
1806 | llvm::DINodeArray | |||
1807 | CGDebugInfo::CollectFunctionTemplateParams(const FunctionDecl *FD, | |||
1808 | llvm::DIFile *Unit) { | |||
1809 | if (FD->getTemplatedKind() == | |||
1810 | FunctionDecl::TK_FunctionTemplateSpecialization) { | |||
1811 | const TemplateParameterList *TList = FD->getTemplateSpecializationInfo() | |||
1812 | ->getTemplate() | |||
1813 | ->getTemplateParameters(); | |||
1814 | return CollectTemplateParams( | |||
1815 | TList, FD->getTemplateSpecializationArgs()->asArray(), Unit); | |||
1816 | } | |||
1817 | return llvm::DINodeArray(); | |||
1818 | } | |||
1819 | ||||
1820 | llvm::DINodeArray CGDebugInfo::CollectVarTemplateParams(const VarDecl *VL, | |||
1821 | llvm::DIFile *Unit) { | |||
1822 | if (auto *TS = dyn_cast<VarTemplateSpecializationDecl>(VL)) { | |||
1823 | auto T = TS->getSpecializedTemplateOrPartial(); | |||
1824 | auto TA = TS->getTemplateArgs().asArray(); | |||
1825 | // Collect parameters for a partial specialization | |||
1826 | if (T.is<VarTemplatePartialSpecializationDecl *>()) { | |||
1827 | const TemplateParameterList *TList = | |||
1828 | T.get<VarTemplatePartialSpecializationDecl *>() | |||
1829 | ->getTemplateParameters(); | |||
1830 | return CollectTemplateParams(TList, TA, Unit); | |||
1831 | } | |||
1832 | ||||
1833 | // Collect parameters for an explicit specialization | |||
1834 | if (T.is<VarTemplateDecl *>()) { | |||
1835 | const TemplateParameterList *TList = T.get<VarTemplateDecl *>() | |||
1836 | ->getTemplateParameters(); | |||
1837 | return CollectTemplateParams(TList, TA, Unit); | |||
1838 | } | |||
1839 | } | |||
1840 | return llvm::DINodeArray(); | |||
1841 | } | |||
1842 | ||||
1843 | llvm::DINodeArray CGDebugInfo::CollectCXXTemplateParams( | |||
1844 | const ClassTemplateSpecializationDecl *TSpecial, llvm::DIFile *Unit) { | |||
1845 | // Always get the full list of parameters, not just the ones from | |||
1846 | // the specialization. | |||
1847 | TemplateParameterList *TPList = | |||
1848 | TSpecial->getSpecializedTemplate()->getTemplateParameters(); | |||
1849 | const TemplateArgumentList &TAList = TSpecial->getTemplateArgs(); | |||
1850 | return CollectTemplateParams(TPList, TAList.asArray(), Unit); | |||
1851 | } | |||
1852 | ||||
1853 | llvm::DIType *CGDebugInfo::getOrCreateVTablePtrType(llvm::DIFile *Unit) { | |||
1854 | if (VTablePtrType) | |||
1855 | return VTablePtrType; | |||
1856 | ||||
1857 | ASTContext &Context = CGM.getContext(); | |||
1858 | ||||
1859 | /* Function type */ | |||
1860 | llvm::Metadata *STy = getOrCreateType(Context.IntTy, Unit); | |||
1861 | llvm::DITypeRefArray SElements = DBuilder.getOrCreateTypeArray(STy); | |||
1862 | llvm::DIType *SubTy = DBuilder.createSubroutineType(SElements); | |||
1863 | unsigned Size = Context.getTypeSize(Context.VoidPtrTy); | |||
1864 | unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace(); | |||
1865 | Optional<unsigned> DWARFAddressSpace = | |||
1866 | CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace); | |||
1867 | ||||
1868 | llvm::DIType *vtbl_ptr_type = DBuilder.createPointerType( | |||
1869 | SubTy, Size, 0, DWARFAddressSpace, "__vtbl_ptr_type"); | |||
1870 | VTablePtrType = DBuilder.createPointerType(vtbl_ptr_type, Size); | |||
1871 | return VTablePtrType; | |||
1872 | } | |||
1873 | ||||
1874 | StringRef CGDebugInfo::getVTableName(const CXXRecordDecl *RD) { | |||
1875 | // Copy the gdb compatible name on the side and use its reference. | |||
1876 | return internString("_vptr$", RD->getNameAsString()); | |||
1877 | } | |||
1878 | ||||
1879 | void CGDebugInfo::CollectVTableInfo(const CXXRecordDecl *RD, llvm::DIFile *Unit, | |||
1880 | SmallVectorImpl<llvm::Metadata *> &EltTys, | |||
1881 | llvm::DICompositeType *RecordTy) { | |||
1882 | // If this class is not dynamic then there is not any vtable info to collect. | |||
1883 | if (!RD->isDynamicClass()) | |||
1884 | return; | |||
1885 | ||||
1886 | // Don't emit any vtable shape or vptr info if this class doesn't have an | |||
1887 | // extendable vfptr. This can happen if the class doesn't have virtual | |||
1888 | // methods, or in the MS ABI if those virtual methods only come from virtually | |||
1889 | // inherited bases. | |||
1890 | const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD); | |||
1891 | if (!RL.hasExtendableVFPtr()) | |||
1892 | return; | |||
1893 | ||||
1894 | // CodeView needs to know how large the vtable of every dynamic class is, so | |||
1895 | // emit a special named pointer type into the element list. The vptr type | |||
1896 | // points to this type as well. | |||
1897 | llvm::DIType *VPtrTy = nullptr; | |||
1898 | bool NeedVTableShape = CGM.getCodeGenOpts().EmitCodeView && | |||
1899 | CGM.getTarget().getCXXABI().isMicrosoft(); | |||
1900 | if (NeedVTableShape) { | |||
1901 | uint64_t PtrWidth = | |||
1902 | CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
1903 | const VTableLayout &VFTLayout = | |||
1904 | CGM.getMicrosoftVTableContext().getVFTableLayout(RD, CharUnits::Zero()); | |||
1905 | unsigned VSlotCount = | |||
1906 | VFTLayout.vtable_components().size() - CGM.getLangOpts().RTTIData; | |||
1907 | unsigned VTableWidth = PtrWidth * VSlotCount; | |||
1908 | unsigned VtblPtrAddressSpace = CGM.getTarget().getVtblPtrAddressSpace(); | |||
1909 | Optional<unsigned> DWARFAddressSpace = | |||
1910 | CGM.getTarget().getDWARFAddressSpace(VtblPtrAddressSpace); | |||
1911 | ||||
1912 | // Create a very wide void* type and insert it directly in the element list. | |||
1913 | llvm::DIType *VTableType = DBuilder.createPointerType( | |||
1914 | nullptr, VTableWidth, 0, DWARFAddressSpace, "__vtbl_ptr_type"); | |||
1915 | EltTys.push_back(VTableType); | |||
1916 | ||||
1917 | // The vptr is a pointer to this special vtable type. | |||
1918 | VPtrTy = DBuilder.createPointerType(VTableType, PtrWidth); | |||
1919 | } | |||
1920 | ||||
1921 | // If there is a primary base then the artificial vptr member lives there. | |||
1922 | if (RL.getPrimaryBase()) | |||
1923 | return; | |||
1924 | ||||
1925 | if (!VPtrTy) | |||
1926 | VPtrTy = getOrCreateVTablePtrType(Unit); | |||
1927 | ||||
1928 | unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy); | |||
1929 | llvm::DIType *VPtrMember = | |||
1930 | DBuilder.createMemberType(Unit, getVTableName(RD), Unit, 0, Size, 0, 0, | |||
1931 | llvm::DINode::FlagArtificial, VPtrTy); | |||
1932 | EltTys.push_back(VPtrMember); | |||
1933 | } | |||
1934 | ||||
1935 | llvm::DIType *CGDebugInfo::getOrCreateRecordType(QualType RTy, | |||
1936 | SourceLocation Loc) { | |||
1937 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1937, __PRETTY_FUNCTION__)); | |||
1938 | llvm::DIType *T = getOrCreateType(RTy, getOrCreateFile(Loc)); | |||
1939 | return T; | |||
1940 | } | |||
1941 | ||||
1942 | llvm::DIType *CGDebugInfo::getOrCreateInterfaceType(QualType D, | |||
1943 | SourceLocation Loc) { | |||
1944 | return getOrCreateStandaloneType(D, Loc); | |||
1945 | } | |||
1946 | ||||
1947 | llvm::DIType *CGDebugInfo::getOrCreateStandaloneType(QualType D, | |||
1948 | SourceLocation Loc) { | |||
1949 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1949, __PRETTY_FUNCTION__)); | |||
1950 | assert(!D.isNull() && "null type")((!D.isNull() && "null type") ? static_cast<void> (0) : __assert_fail ("!D.isNull() && \"null type\"", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1950, __PRETTY_FUNCTION__)); | |||
1951 | llvm::DIType *T = getOrCreateType(D, getOrCreateFile(Loc)); | |||
1952 | assert(T && "could not create debug info for type")((T && "could not create debug info for type") ? static_cast <void> (0) : __assert_fail ("T && \"could not create debug info for type\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1952, __PRETTY_FUNCTION__)); | |||
1953 | ||||
1954 | RetainedTypes.push_back(D.getAsOpaquePtr()); | |||
1955 | return T; | |||
1956 | } | |||
1957 | ||||
1958 | void CGDebugInfo::completeType(const EnumDecl *ED) { | |||
1959 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
1960 | return; | |||
1961 | QualType Ty = CGM.getContext().getEnumType(ED); | |||
1962 | void *TyPtr = Ty.getAsOpaquePtr(); | |||
1963 | auto I = TypeCache.find(TyPtr); | |||
1964 | if (I == TypeCache.end() || !cast<llvm::DIType>(I->second)->isForwardDecl()) | |||
1965 | return; | |||
1966 | llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<EnumType>()); | |||
1967 | assert(!Res->isForwardDecl())((!Res->isForwardDecl()) ? static_cast<void> (0) : __assert_fail ("!Res->isForwardDecl()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 1967, __PRETTY_FUNCTION__)); | |||
1968 | TypeCache[TyPtr].reset(Res); | |||
1969 | } | |||
1970 | ||||
1971 | void CGDebugInfo::completeType(const RecordDecl *RD) { | |||
1972 | if (DebugKind > codegenoptions::LimitedDebugInfo || | |||
1973 | !CGM.getLangOpts().CPlusPlus) | |||
1974 | completeRequiredType(RD); | |||
1975 | } | |||
1976 | ||||
1977 | /// Return true if the class or any of its methods are marked dllimport. | |||
1978 | static bool isClassOrMethodDLLImport(const CXXRecordDecl *RD) { | |||
1979 | if (RD->hasAttr<DLLImportAttr>()) | |||
1980 | return true; | |||
1981 | for (const CXXMethodDecl *MD : RD->methods()) | |||
1982 | if (MD->hasAttr<DLLImportAttr>()) | |||
1983 | return true; | |||
1984 | return false; | |||
1985 | } | |||
1986 | ||||
1987 | /// Does a type definition exist in an imported clang module? | |||
1988 | static bool isDefinedInClangModule(const RecordDecl *RD) { | |||
1989 | // Only definitions that where imported from an AST file come from a module. | |||
1990 | if (!RD || !RD->isFromASTFile()) | |||
1991 | return false; | |||
1992 | // Anonymous entities cannot be addressed. Treat them as not from module. | |||
1993 | if (!RD->isExternallyVisible() && RD->getName().empty()) | |||
1994 | return false; | |||
1995 | if (auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) { | |||
1996 | if (!CXXDecl->isCompleteDefinition()) | |||
1997 | return false; | |||
1998 | // Check wether RD is a template. | |||
1999 | auto TemplateKind = CXXDecl->getTemplateSpecializationKind(); | |||
2000 | if (TemplateKind != TSK_Undeclared) { | |||
2001 | // Unfortunately getOwningModule() isn't accurate enough to find the | |||
2002 | // owning module of a ClassTemplateSpecializationDecl that is inside a | |||
2003 | // namespace spanning multiple modules. | |||
2004 | bool Explicit = false; | |||
2005 | if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(CXXDecl)) | |||
2006 | Explicit = TD->isExplicitInstantiationOrSpecialization(); | |||
2007 | if (!Explicit && CXXDecl->getEnclosingNamespaceContext()) | |||
2008 | return false; | |||
2009 | // This is a template, check the origin of the first member. | |||
2010 | if (CXXDecl->field_begin() == CXXDecl->field_end()) | |||
2011 | return TemplateKind == TSK_ExplicitInstantiationDeclaration; | |||
2012 | if (!CXXDecl->field_begin()->isFromASTFile()) | |||
2013 | return false; | |||
2014 | } | |||
2015 | } | |||
2016 | return true; | |||
2017 | } | |||
2018 | ||||
2019 | void CGDebugInfo::completeClassData(const RecordDecl *RD) { | |||
2020 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RD)) | |||
2021 | if (CXXRD->isDynamicClass() && | |||
2022 | CGM.getVTableLinkage(CXXRD) == | |||
2023 | llvm::GlobalValue::AvailableExternallyLinkage && | |||
2024 | !isClassOrMethodDLLImport(CXXRD)) | |||
2025 | return; | |||
2026 | ||||
2027 | if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition())) | |||
2028 | return; | |||
2029 | ||||
2030 | completeClass(RD); | |||
2031 | } | |||
2032 | ||||
2033 | void CGDebugInfo::completeClass(const RecordDecl *RD) { | |||
2034 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
2035 | return; | |||
2036 | QualType Ty = CGM.getContext().getRecordType(RD); | |||
2037 | void *TyPtr = Ty.getAsOpaquePtr(); | |||
2038 | auto I = TypeCache.find(TyPtr); | |||
2039 | if (I != TypeCache.end() && !cast<llvm::DIType>(I->second)->isForwardDecl()) | |||
2040 | return; | |||
2041 | llvm::DIType *Res = CreateTypeDefinition(Ty->castAs<RecordType>()); | |||
2042 | assert(!Res->isForwardDecl())((!Res->isForwardDecl()) ? static_cast<void> (0) : __assert_fail ("!Res->isForwardDecl()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2042, __PRETTY_FUNCTION__)); | |||
2043 | TypeCache[TyPtr].reset(Res); | |||
2044 | } | |||
2045 | ||||
2046 | static bool hasExplicitMemberDefinition(CXXRecordDecl::method_iterator I, | |||
2047 | CXXRecordDecl::method_iterator End) { | |||
2048 | for (CXXMethodDecl *MD : llvm::make_range(I, End)) | |||
2049 | if (FunctionDecl *Tmpl = MD->getInstantiatedFromMemberFunction()) | |||
2050 | if (!Tmpl->isImplicit() && Tmpl->isThisDeclarationADefinition() && | |||
2051 | !MD->getMemberSpecializationInfo()->isExplicitSpecialization()) | |||
2052 | return true; | |||
2053 | return false; | |||
2054 | } | |||
2055 | ||||
2056 | static bool shouldOmitDefinition(codegenoptions::DebugInfoKind DebugKind, | |||
2057 | bool DebugTypeExtRefs, const RecordDecl *RD, | |||
2058 | const LangOptions &LangOpts) { | |||
2059 | if (DebugTypeExtRefs && isDefinedInClangModule(RD->getDefinition())) | |||
2060 | return true; | |||
2061 | ||||
2062 | if (auto *ES = RD->getASTContext().getExternalSource()) | |||
2063 | if (ES->hasExternalDefinitions(RD) == ExternalASTSource::EK_Always) | |||
2064 | return true; | |||
2065 | ||||
2066 | if (DebugKind > codegenoptions::LimitedDebugInfo) | |||
2067 | return false; | |||
2068 | ||||
2069 | if (!LangOpts.CPlusPlus) | |||
2070 | return false; | |||
2071 | ||||
2072 | if (!RD->isCompleteDefinitionRequired()) | |||
2073 | return true; | |||
2074 | ||||
2075 | const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD); | |||
2076 | ||||
2077 | if (!CXXDecl) | |||
2078 | return false; | |||
2079 | ||||
2080 | // Only emit complete debug info for a dynamic class when its vtable is | |||
2081 | // emitted. However, Microsoft debuggers don't resolve type information | |||
2082 | // across DLL boundaries, so skip this optimization if the class or any of its | |||
2083 | // methods are marked dllimport. This isn't a complete solution, since objects | |||
2084 | // without any dllimport methods can be used in one DLL and constructed in | |||
2085 | // another, but it is the current behavior of LimitedDebugInfo. | |||
2086 | if (CXXDecl->hasDefinition() && CXXDecl->isDynamicClass() && | |||
2087 | !isClassOrMethodDLLImport(CXXDecl)) | |||
2088 | return true; | |||
2089 | ||||
2090 | TemplateSpecializationKind Spec = TSK_Undeclared; | |||
2091 | if (const auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(RD)) | |||
2092 | Spec = SD->getSpecializationKind(); | |||
2093 | ||||
2094 | if (Spec == TSK_ExplicitInstantiationDeclaration && | |||
2095 | hasExplicitMemberDefinition(CXXDecl->method_begin(), | |||
2096 | CXXDecl->method_end())) | |||
2097 | return true; | |||
2098 | ||||
2099 | return false; | |||
2100 | } | |||
2101 | ||||
2102 | void CGDebugInfo::completeRequiredType(const RecordDecl *RD) { | |||
2103 | if (shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD, CGM.getLangOpts())) | |||
2104 | return; | |||
2105 | ||||
2106 | QualType Ty = CGM.getContext().getRecordType(RD); | |||
2107 | llvm::DIType *T = getTypeOrNull(Ty); | |||
2108 | if (T && T->isForwardDecl()) | |||
2109 | completeClassData(RD); | |||
2110 | } | |||
2111 | ||||
2112 | llvm::DIType *CGDebugInfo::CreateType(const RecordType *Ty) { | |||
2113 | RecordDecl *RD = Ty->getDecl(); | |||
2114 | llvm::DIType *T = cast_or_null<llvm::DIType>(getTypeOrNull(QualType(Ty, 0))); | |||
2115 | if (T || shouldOmitDefinition(DebugKind, DebugTypeExtRefs, RD, | |||
2116 | CGM.getLangOpts())) { | |||
2117 | if (!T) | |||
2118 | T = getOrCreateRecordFwdDecl(Ty, getDeclContextDescriptor(RD)); | |||
2119 | return T; | |||
2120 | } | |||
2121 | ||||
2122 | return CreateTypeDefinition(Ty); | |||
2123 | } | |||
2124 | ||||
2125 | llvm::DIType *CGDebugInfo::CreateTypeDefinition(const RecordType *Ty) { | |||
2126 | RecordDecl *RD = Ty->getDecl(); | |||
2127 | ||||
2128 | // Get overall information about the record type for the debug info. | |||
2129 | llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation()); | |||
2130 | ||||
2131 | // Records and classes and unions can all be recursive. To handle them, we | |||
2132 | // first generate a debug descriptor for the struct as a forward declaration. | |||
2133 | // Then (if it is a definition) we go through and get debug info for all of | |||
2134 | // its members. Finally, we create a descriptor for the complete type (which | |||
2135 | // may refer to the forward decl if the struct is recursive) and replace all | |||
2136 | // uses of the forward declaration with the final definition. | |||
2137 | llvm::DICompositeType *FwdDecl = getOrCreateLimitedType(Ty, DefUnit); | |||
2138 | ||||
2139 | const RecordDecl *D = RD->getDefinition(); | |||
2140 | if (!D || !D->isCompleteDefinition()) | |||
2141 | return FwdDecl; | |||
2142 | ||||
2143 | if (const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) | |||
2144 | CollectContainingType(CXXDecl, FwdDecl); | |||
2145 | ||||
2146 | // Push the struct on region stack. | |||
2147 | LexicalBlockStack.emplace_back(&*FwdDecl); | |||
2148 | RegionMap[Ty->getDecl()].reset(FwdDecl); | |||
2149 | ||||
2150 | // Convert all the elements. | |||
2151 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
2152 | // what about nested types? | |||
2153 | ||||
2154 | // Note: The split of CXXDecl information here is intentional, the | |||
2155 | // gdb tests will depend on a certain ordering at printout. The debug | |||
2156 | // information offsets are still correct if we merge them all together | |||
2157 | // though. | |||
2158 | const auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD); | |||
2159 | if (CXXDecl) { | |||
2160 | CollectCXXBases(CXXDecl, DefUnit, EltTys, FwdDecl); | |||
2161 | CollectVTableInfo(CXXDecl, DefUnit, EltTys, FwdDecl); | |||
2162 | } | |||
2163 | ||||
2164 | // Collect data fields (including static variables and any initializers). | |||
2165 | CollectRecordFields(RD, DefUnit, EltTys, FwdDecl); | |||
2166 | if (CXXDecl) | |||
2167 | CollectCXXMemberFunctions(CXXDecl, DefUnit, EltTys, FwdDecl); | |||
2168 | ||||
2169 | LexicalBlockStack.pop_back(); | |||
2170 | RegionMap.erase(Ty->getDecl()); | |||
2171 | ||||
2172 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
2173 | DBuilder.replaceArrays(FwdDecl, Elements); | |||
2174 | ||||
2175 | if (FwdDecl->isTemporary()) | |||
2176 | FwdDecl = | |||
2177 | llvm::MDNode::replaceWithPermanent(llvm::TempDICompositeType(FwdDecl)); | |||
2178 | ||||
2179 | RegionMap[Ty->getDecl()].reset(FwdDecl); | |||
2180 | return FwdDecl; | |||
2181 | } | |||
2182 | ||||
2183 | llvm::DIType *CGDebugInfo::CreateType(const ObjCObjectType *Ty, | |||
2184 | llvm::DIFile *Unit) { | |||
2185 | // Ignore protocols. | |||
2186 | return getOrCreateType(Ty->getBaseType(), Unit); | |||
2187 | } | |||
2188 | ||||
2189 | llvm::DIType *CGDebugInfo::CreateType(const ObjCTypeParamType *Ty, | |||
2190 | llvm::DIFile *Unit) { | |||
2191 | // Ignore protocols. | |||
2192 | SourceLocation Loc = Ty->getDecl()->getLocation(); | |||
2193 | ||||
2194 | // Use Typedefs to represent ObjCTypeParamType. | |||
2195 | return DBuilder.createTypedef( | |||
2196 | getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit), | |||
2197 | Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc), | |||
2198 | getDeclContextDescriptor(Ty->getDecl())); | |||
2199 | } | |||
2200 | ||||
2201 | /// \return true if Getter has the default name for the property PD. | |||
2202 | static bool hasDefaultGetterName(const ObjCPropertyDecl *PD, | |||
2203 | const ObjCMethodDecl *Getter) { | |||
2204 | assert(PD)((PD) ? static_cast<void> (0) : __assert_fail ("PD", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2204, __PRETTY_FUNCTION__)); | |||
2205 | if (!Getter) | |||
2206 | return true; | |||
2207 | ||||
2208 | assert(Getter->getDeclName().isObjCZeroArgSelector())((Getter->getDeclName().isObjCZeroArgSelector()) ? static_cast <void> (0) : __assert_fail ("Getter->getDeclName().isObjCZeroArgSelector()" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2208, __PRETTY_FUNCTION__)); | |||
2209 | return PD->getName() == | |||
2210 | Getter->getDeclName().getObjCSelector().getNameForSlot(0); | |||
2211 | } | |||
2212 | ||||
2213 | /// \return true if Setter has the default name for the property PD. | |||
2214 | static bool hasDefaultSetterName(const ObjCPropertyDecl *PD, | |||
2215 | const ObjCMethodDecl *Setter) { | |||
2216 | assert(PD)((PD) ? static_cast<void> (0) : __assert_fail ("PD", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2216, __PRETTY_FUNCTION__)); | |||
2217 | if (!Setter) | |||
2218 | return true; | |||
2219 | ||||
2220 | assert(Setter->getDeclName().isObjCOneArgSelector())((Setter->getDeclName().isObjCOneArgSelector()) ? static_cast <void> (0) : __assert_fail ("Setter->getDeclName().isObjCOneArgSelector()" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2220, __PRETTY_FUNCTION__)); | |||
2221 | return SelectorTable::constructSetterName(PD->getName()) == | |||
2222 | Setter->getDeclName().getObjCSelector().getNameForSlot(0); | |||
2223 | } | |||
2224 | ||||
2225 | llvm::DIType *CGDebugInfo::CreateType(const ObjCInterfaceType *Ty, | |||
2226 | llvm::DIFile *Unit) { | |||
2227 | ObjCInterfaceDecl *ID = Ty->getDecl(); | |||
2228 | if (!ID) | |||
2229 | return nullptr; | |||
2230 | ||||
2231 | // Return a forward declaration if this type was imported from a clang module, | |||
2232 | // and this is not the compile unit with the implementation of the type (which | |||
2233 | // may contain hidden ivars). | |||
2234 | if (DebugTypeExtRefs && ID->isFromASTFile() && ID->getDefinition() && | |||
2235 | !ID->getImplementation()) | |||
2236 | return DBuilder.createForwardDecl(llvm::dwarf::DW_TAG_structure_type, | |||
2237 | ID->getName(), | |||
2238 | getDeclContextDescriptor(ID), Unit, 0); | |||
2239 | ||||
2240 | // Get overall information about the record type for the debug info. | |||
2241 | llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation()); | |||
2242 | unsigned Line = getLineNumber(ID->getLocation()); | |||
2243 | auto RuntimeLang = | |||
2244 | static_cast<llvm::dwarf::SourceLanguage>(TheCU->getSourceLanguage()); | |||
2245 | ||||
2246 | // If this is just a forward declaration return a special forward-declaration | |||
2247 | // debug type since we won't be able to lay out the entire type. | |||
2248 | ObjCInterfaceDecl *Def = ID->getDefinition(); | |||
2249 | if (!Def || !Def->getImplementation()) { | |||
2250 | llvm::DIScope *Mod = getParentModuleOrNull(ID); | |||
2251 | llvm::DIType *FwdDecl = DBuilder.createReplaceableCompositeType( | |||
2252 | llvm::dwarf::DW_TAG_structure_type, ID->getName(), Mod ? Mod : TheCU, | |||
2253 | DefUnit, Line, RuntimeLang); | |||
2254 | ObjCInterfaceCache.push_back(ObjCInterfaceCacheEntry(Ty, FwdDecl, Unit)); | |||
2255 | return FwdDecl; | |||
2256 | } | |||
2257 | ||||
2258 | return CreateTypeDefinition(Ty, Unit); | |||
2259 | } | |||
2260 | ||||
2261 | llvm::DIModule * | |||
2262 | CGDebugInfo::getOrCreateModuleRef(ExternalASTSource::ASTSourceDescriptor Mod, | |||
2263 | bool CreateSkeletonCU) { | |||
2264 | // Use the Module pointer as the key into the cache. This is a | |||
2265 | // nullptr if the "Module" is a PCH, which is safe because we don't | |||
2266 | // support chained PCH debug info, so there can only be a single PCH. | |||
2267 | const Module *M = Mod.getModuleOrNull(); | |||
2268 | auto ModRef = ModuleCache.find(M); | |||
2269 | if (ModRef != ModuleCache.end()) | |||
2270 | return cast<llvm::DIModule>(ModRef->second); | |||
2271 | ||||
2272 | // Macro definitions that were defined with "-D" on the command line. | |||
2273 | SmallString<128> ConfigMacros; | |||
2274 | { | |||
2275 | llvm::raw_svector_ostream OS(ConfigMacros); | |||
2276 | const auto &PPOpts = CGM.getPreprocessorOpts(); | |||
2277 | unsigned I = 0; | |||
2278 | // Translate the macro definitions back into a command line. | |||
2279 | for (auto &M : PPOpts.Macros) { | |||
2280 | if (++I > 1) | |||
2281 | OS << " "; | |||
2282 | const std::string &Macro = M.first; | |||
2283 | bool Undef = M.second; | |||
2284 | OS << "\"-" << (Undef ? 'U' : 'D'); | |||
2285 | for (char c : Macro) | |||
2286 | switch (c) { | |||
2287 | case '\\': | |||
2288 | OS << "\\\\"; | |||
2289 | break; | |||
2290 | case '"': | |||
2291 | OS << "\\\""; | |||
2292 | break; | |||
2293 | default: | |||
2294 | OS << c; | |||
2295 | } | |||
2296 | OS << '\"'; | |||
2297 | } | |||
2298 | } | |||
2299 | ||||
2300 | bool IsRootModule = M ? !M->Parent : true; | |||
2301 | if (CreateSkeletonCU && IsRootModule) { | |||
2302 | // PCH files don't have a signature field in the control block, | |||
2303 | // but LLVM detects skeleton CUs by looking for a non-zero DWO id. | |||
2304 | // We use the lower 64 bits for debug info. | |||
2305 | uint64_t Signature = | |||
2306 | Mod.getSignature() | |||
2307 | ? (uint64_t)Mod.getSignature()[1] << 32 | Mod.getSignature()[0] | |||
2308 | : ~1ULL; | |||
2309 | llvm::DIBuilder DIB(CGM.getModule()); | |||
2310 | DIB.createCompileUnit(TheCU->getSourceLanguage(), | |||
2311 | // TODO: Support "Source" from external AST providers? | |||
2312 | DIB.createFile(Mod.getModuleName(), Mod.getPath()), | |||
2313 | TheCU->getProducer(), true, StringRef(), 0, | |||
2314 | Mod.getASTFile(), llvm::DICompileUnit::FullDebug, | |||
2315 | Signature); | |||
2316 | DIB.finalize(); | |||
2317 | } | |||
2318 | llvm::DIModule *Parent = | |||
2319 | IsRootModule ? nullptr | |||
2320 | : getOrCreateModuleRef( | |||
2321 | ExternalASTSource::ASTSourceDescriptor(*M->Parent), | |||
2322 | CreateSkeletonCU); | |||
2323 | llvm::DIModule *DIMod = | |||
2324 | DBuilder.createModule(Parent, Mod.getModuleName(), ConfigMacros, | |||
2325 | Mod.getPath(), CGM.getHeaderSearchOpts().Sysroot); | |||
2326 | ModuleCache[M].reset(DIMod); | |||
2327 | return DIMod; | |||
2328 | } | |||
2329 | ||||
2330 | llvm::DIType *CGDebugInfo::CreateTypeDefinition(const ObjCInterfaceType *Ty, | |||
2331 | llvm::DIFile *Unit) { | |||
2332 | ObjCInterfaceDecl *ID = Ty->getDecl(); | |||
2333 | llvm::DIFile *DefUnit = getOrCreateFile(ID->getLocation()); | |||
2334 | unsigned Line = getLineNumber(ID->getLocation()); | |||
2335 | unsigned RuntimeLang = TheCU->getSourceLanguage(); | |||
2336 | ||||
2337 | // Bit size, align and offset of the type. | |||
2338 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
2339 | auto Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
2340 | ||||
2341 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
2342 | if (ID->getImplementation()) | |||
2343 | Flags |= llvm::DINode::FlagObjcClassComplete; | |||
2344 | ||||
2345 | llvm::DIScope *Mod = getParentModuleOrNull(ID); | |||
2346 | llvm::DICompositeType *RealDecl = DBuilder.createStructType( | |||
2347 | Mod ? Mod : Unit, ID->getName(), DefUnit, Line, Size, Align, Flags, | |||
2348 | nullptr, llvm::DINodeArray(), RuntimeLang); | |||
2349 | ||||
2350 | QualType QTy(Ty, 0); | |||
2351 | TypeCache[QTy.getAsOpaquePtr()].reset(RealDecl); | |||
2352 | ||||
2353 | // Push the struct on region stack. | |||
2354 | LexicalBlockStack.emplace_back(RealDecl); | |||
2355 | RegionMap[Ty->getDecl()].reset(RealDecl); | |||
2356 | ||||
2357 | // Convert all the elements. | |||
2358 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
2359 | ||||
2360 | ObjCInterfaceDecl *SClass = ID->getSuperClass(); | |||
2361 | if (SClass) { | |||
2362 | llvm::DIType *SClassTy = | |||
2363 | getOrCreateType(CGM.getContext().getObjCInterfaceType(SClass), Unit); | |||
2364 | if (!SClassTy) | |||
2365 | return nullptr; | |||
2366 | ||||
2367 | llvm::DIType *InhTag = DBuilder.createInheritance(RealDecl, SClassTy, 0, 0, | |||
2368 | llvm::DINode::FlagZero); | |||
2369 | EltTys.push_back(InhTag); | |||
2370 | } | |||
2371 | ||||
2372 | // Create entries for all of the properties. | |||
2373 | auto AddProperty = [&](const ObjCPropertyDecl *PD) { | |||
2374 | SourceLocation Loc = PD->getLocation(); | |||
2375 | llvm::DIFile *PUnit = getOrCreateFile(Loc); | |||
2376 | unsigned PLine = getLineNumber(Loc); | |||
2377 | ObjCMethodDecl *Getter = PD->getGetterMethodDecl(); | |||
2378 | ObjCMethodDecl *Setter = PD->getSetterMethodDecl(); | |||
2379 | llvm::MDNode *PropertyNode = DBuilder.createObjCProperty( | |||
2380 | PD->getName(), PUnit, PLine, | |||
2381 | hasDefaultGetterName(PD, Getter) ? "" | |||
2382 | : getSelectorName(PD->getGetterName()), | |||
2383 | hasDefaultSetterName(PD, Setter) ? "" | |||
2384 | : getSelectorName(PD->getSetterName()), | |||
2385 | PD->getPropertyAttributes(), getOrCreateType(PD->getType(), PUnit)); | |||
2386 | EltTys.push_back(PropertyNode); | |||
2387 | }; | |||
2388 | { | |||
2389 | llvm::SmallPtrSet<const IdentifierInfo *, 16> PropertySet; | |||
2390 | for (const ObjCCategoryDecl *ClassExt : ID->known_extensions()) | |||
2391 | for (auto *PD : ClassExt->properties()) { | |||
2392 | PropertySet.insert(PD->getIdentifier()); | |||
2393 | AddProperty(PD); | |||
2394 | } | |||
2395 | for (const auto *PD : ID->properties()) { | |||
2396 | // Don't emit duplicate metadata for properties that were already in a | |||
2397 | // class extension. | |||
2398 | if (!PropertySet.insert(PD->getIdentifier()).second) | |||
2399 | continue; | |||
2400 | AddProperty(PD); | |||
2401 | } | |||
2402 | } | |||
2403 | ||||
2404 | const ASTRecordLayout &RL = CGM.getContext().getASTObjCInterfaceLayout(ID); | |||
2405 | unsigned FieldNo = 0; | |||
2406 | for (ObjCIvarDecl *Field = ID->all_declared_ivar_begin(); Field; | |||
2407 | Field = Field->getNextIvar(), ++FieldNo) { | |||
2408 | llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit); | |||
2409 | if (!FieldTy) | |||
2410 | return nullptr; | |||
2411 | ||||
2412 | StringRef FieldName = Field->getName(); | |||
2413 | ||||
2414 | // Ignore unnamed fields. | |||
2415 | if (FieldName.empty()) | |||
2416 | continue; | |||
2417 | ||||
2418 | // Get the location for the field. | |||
2419 | llvm::DIFile *FieldDefUnit = getOrCreateFile(Field->getLocation()); | |||
2420 | unsigned FieldLine = getLineNumber(Field->getLocation()); | |||
2421 | QualType FType = Field->getType(); | |||
2422 | uint64_t FieldSize = 0; | |||
2423 | uint32_t FieldAlign = 0; | |||
2424 | ||||
2425 | if (!FType->isIncompleteArrayType()) { | |||
2426 | ||||
2427 | // Bit size, align and offset of the type. | |||
2428 | FieldSize = Field->isBitField() | |||
2429 | ? Field->getBitWidthValue(CGM.getContext()) | |||
2430 | : CGM.getContext().getTypeSize(FType); | |||
2431 | FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext()); | |||
2432 | } | |||
2433 | ||||
2434 | uint64_t FieldOffset; | |||
2435 | if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) { | |||
2436 | // We don't know the runtime offset of an ivar if we're using the | |||
2437 | // non-fragile ABI. For bitfields, use the bit offset into the first | |||
2438 | // byte of storage of the bitfield. For other fields, use zero. | |||
2439 | if (Field->isBitField()) { | |||
2440 | FieldOffset = | |||
2441 | CGM.getObjCRuntime().ComputeBitfieldBitOffset(CGM, ID, Field); | |||
2442 | FieldOffset %= CGM.getContext().getCharWidth(); | |||
2443 | } else { | |||
2444 | FieldOffset = 0; | |||
2445 | } | |||
2446 | } else { | |||
2447 | FieldOffset = RL.getFieldOffset(FieldNo); | |||
2448 | } | |||
2449 | ||||
2450 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
2451 | if (Field->getAccessControl() == ObjCIvarDecl::Protected) | |||
2452 | Flags = llvm::DINode::FlagProtected; | |||
2453 | else if (Field->getAccessControl() == ObjCIvarDecl::Private) | |||
2454 | Flags = llvm::DINode::FlagPrivate; | |||
2455 | else if (Field->getAccessControl() == ObjCIvarDecl::Public) | |||
2456 | Flags = llvm::DINode::FlagPublic; | |||
2457 | ||||
2458 | llvm::MDNode *PropertyNode = nullptr; | |||
2459 | if (ObjCImplementationDecl *ImpD = ID->getImplementation()) { | |||
2460 | if (ObjCPropertyImplDecl *PImpD = | |||
2461 | ImpD->FindPropertyImplIvarDecl(Field->getIdentifier())) { | |||
2462 | if (ObjCPropertyDecl *PD = PImpD->getPropertyDecl()) { | |||
2463 | SourceLocation Loc = PD->getLocation(); | |||
2464 | llvm::DIFile *PUnit = getOrCreateFile(Loc); | |||
2465 | unsigned PLine = getLineNumber(Loc); | |||
2466 | ObjCMethodDecl *Getter = PD->getGetterMethodDecl(); | |||
2467 | ObjCMethodDecl *Setter = PD->getSetterMethodDecl(); | |||
2468 | PropertyNode = DBuilder.createObjCProperty( | |||
2469 | PD->getName(), PUnit, PLine, | |||
2470 | hasDefaultGetterName(PD, Getter) | |||
2471 | ? "" | |||
2472 | : getSelectorName(PD->getGetterName()), | |||
2473 | hasDefaultSetterName(PD, Setter) | |||
2474 | ? "" | |||
2475 | : getSelectorName(PD->getSetterName()), | |||
2476 | PD->getPropertyAttributes(), | |||
2477 | getOrCreateType(PD->getType(), PUnit)); | |||
2478 | } | |||
2479 | } | |||
2480 | } | |||
2481 | FieldTy = DBuilder.createObjCIVar(FieldName, FieldDefUnit, FieldLine, | |||
2482 | FieldSize, FieldAlign, FieldOffset, Flags, | |||
2483 | FieldTy, PropertyNode); | |||
2484 | EltTys.push_back(FieldTy); | |||
2485 | } | |||
2486 | ||||
2487 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
2488 | DBuilder.replaceArrays(RealDecl, Elements); | |||
2489 | ||||
2490 | LexicalBlockStack.pop_back(); | |||
2491 | return RealDecl; | |||
2492 | } | |||
2493 | ||||
2494 | llvm::DIType *CGDebugInfo::CreateType(const VectorType *Ty, | |||
2495 | llvm::DIFile *Unit) { | |||
2496 | llvm::DIType *ElementTy = getOrCreateType(Ty->getElementType(), Unit); | |||
2497 | int64_t Count = Ty->getNumElements(); | |||
2498 | ||||
2499 | llvm::Metadata *Subscript; | |||
2500 | QualType QTy(Ty, 0); | |||
2501 | auto SizeExpr = SizeExprCache.find(QTy); | |||
2502 | if (SizeExpr != SizeExprCache.end()) | |||
2503 | Subscript = DBuilder.getOrCreateSubrange(0, SizeExpr->getSecond()); | |||
2504 | else | |||
2505 | Subscript = DBuilder.getOrCreateSubrange(0, Count ? Count : -1); | |||
2506 | llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscript); | |||
2507 | ||||
2508 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
2509 | auto Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
2510 | ||||
2511 | return DBuilder.createVectorType(Size, Align, ElementTy, SubscriptArray); | |||
2512 | } | |||
2513 | ||||
2514 | llvm::DIType *CGDebugInfo::CreateType(const ArrayType *Ty, llvm::DIFile *Unit) { | |||
2515 | uint64_t Size; | |||
2516 | uint32_t Align; | |||
2517 | ||||
2518 | // FIXME: make getTypeAlign() aware of VLAs and incomplete array types | |||
2519 | if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) { | |||
2520 | Size = 0; | |||
2521 | Align = getTypeAlignIfRequired(CGM.getContext().getBaseElementType(VAT), | |||
2522 | CGM.getContext()); | |||
2523 | } else if (Ty->isIncompleteArrayType()) { | |||
2524 | Size = 0; | |||
2525 | if (Ty->getElementType()->isIncompleteType()) | |||
2526 | Align = 0; | |||
2527 | else | |||
2528 | Align = getTypeAlignIfRequired(Ty->getElementType(), CGM.getContext()); | |||
2529 | } else if (Ty->isIncompleteType()) { | |||
2530 | Size = 0; | |||
2531 | Align = 0; | |||
2532 | } else { | |||
2533 | // Size and align of the whole array, not the element type. | |||
2534 | Size = CGM.getContext().getTypeSize(Ty); | |||
2535 | Align = getTypeAlignIfRequired(Ty, CGM.getContext()); | |||
2536 | } | |||
2537 | ||||
2538 | // Add the dimensions of the array. FIXME: This loses CV qualifiers from | |||
2539 | // interior arrays, do we care? Why aren't nested arrays represented the | |||
2540 | // obvious/recursive way? | |||
2541 | SmallVector<llvm::Metadata *, 8> Subscripts; | |||
2542 | QualType EltTy(Ty, 0); | |||
2543 | while ((Ty = dyn_cast<ArrayType>(EltTy))) { | |||
2544 | // If the number of elements is known, then count is that number. Otherwise, | |||
2545 | // it's -1. This allows us to represent a subrange with an array of 0 | |||
2546 | // elements, like this: | |||
2547 | // | |||
2548 | // struct foo { | |||
2549 | // int x[0]; | |||
2550 | // }; | |||
2551 | int64_t Count = -1; // Count == -1 is an unbounded array. | |||
2552 | if (const auto *CAT = dyn_cast<ConstantArrayType>(Ty)) | |||
2553 | Count = CAT->getSize().getZExtValue(); | |||
2554 | else if (const auto *VAT = dyn_cast<VariableArrayType>(Ty)) { | |||
2555 | if (Expr *Size = VAT->getSizeExpr()) { | |||
2556 | Expr::EvalResult Result; | |||
2557 | if (Size->EvaluateAsInt(Result, CGM.getContext())) | |||
2558 | Count = Result.Val.getInt().getExtValue(); | |||
2559 | } | |||
2560 | } | |||
2561 | ||||
2562 | auto SizeNode = SizeExprCache.find(EltTy); | |||
2563 | if (SizeNode != SizeExprCache.end()) | |||
2564 | Subscripts.push_back( | |||
2565 | DBuilder.getOrCreateSubrange(0, SizeNode->getSecond())); | |||
2566 | else | |||
2567 | Subscripts.push_back(DBuilder.getOrCreateSubrange(0, Count)); | |||
2568 | EltTy = Ty->getElementType(); | |||
2569 | } | |||
2570 | ||||
2571 | llvm::DINodeArray SubscriptArray = DBuilder.getOrCreateArray(Subscripts); | |||
2572 | ||||
2573 | return DBuilder.createArrayType(Size, Align, getOrCreateType(EltTy, Unit), | |||
2574 | SubscriptArray); | |||
2575 | } | |||
2576 | ||||
2577 | llvm::DIType *CGDebugInfo::CreateType(const LValueReferenceType *Ty, | |||
2578 | llvm::DIFile *Unit) { | |||
2579 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_reference_type, Ty, | |||
2580 | Ty->getPointeeType(), Unit); | |||
2581 | } | |||
2582 | ||||
2583 | llvm::DIType *CGDebugInfo::CreateType(const RValueReferenceType *Ty, | |||
2584 | llvm::DIFile *Unit) { | |||
2585 | return CreatePointerLikeType(llvm::dwarf::DW_TAG_rvalue_reference_type, Ty, | |||
2586 | Ty->getPointeeType(), Unit); | |||
2587 | } | |||
2588 | ||||
2589 | llvm::DIType *CGDebugInfo::CreateType(const MemberPointerType *Ty, | |||
2590 | llvm::DIFile *U) { | |||
2591 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
2592 | uint64_t Size = 0; | |||
2593 | ||||
2594 | if (!Ty->isIncompleteType()) { | |||
2595 | Size = CGM.getContext().getTypeSize(Ty); | |||
2596 | ||||
2597 | // Set the MS inheritance model. There is no flag for the unspecified model. | |||
2598 | if (CGM.getTarget().getCXXABI().isMicrosoft()) { | |||
2599 | switch (Ty->getMostRecentCXXRecordDecl()->getMSInheritanceModel()) { | |||
2600 | case MSInheritanceAttr::Keyword_single_inheritance: | |||
2601 | Flags |= llvm::DINode::FlagSingleInheritance; | |||
2602 | break; | |||
2603 | case MSInheritanceAttr::Keyword_multiple_inheritance: | |||
2604 | Flags |= llvm::DINode::FlagMultipleInheritance; | |||
2605 | break; | |||
2606 | case MSInheritanceAttr::Keyword_virtual_inheritance: | |||
2607 | Flags |= llvm::DINode::FlagVirtualInheritance; | |||
2608 | break; | |||
2609 | case MSInheritanceAttr::Keyword_unspecified_inheritance: | |||
2610 | break; | |||
2611 | } | |||
2612 | } | |||
2613 | } | |||
2614 | ||||
2615 | llvm::DIType *ClassType = getOrCreateType(QualType(Ty->getClass(), 0), U); | |||
2616 | if (Ty->isMemberDataPointerType()) | |||
2617 | return DBuilder.createMemberPointerType( | |||
2618 | getOrCreateType(Ty->getPointeeType(), U), ClassType, Size, /*Align=*/0, | |||
2619 | Flags); | |||
2620 | ||||
2621 | const FunctionProtoType *FPT = | |||
2622 | Ty->getPointeeType()->getAs<FunctionProtoType>(); | |||
2623 | return DBuilder.createMemberPointerType( | |||
2624 | getOrCreateInstanceMethodType( | |||
2625 | CXXMethodDecl::getThisType(FPT, Ty->getMostRecentCXXRecordDecl()), | |||
2626 | FPT, U), | |||
2627 | ClassType, Size, /*Align=*/0, Flags); | |||
2628 | } | |||
2629 | ||||
2630 | llvm::DIType *CGDebugInfo::CreateType(const AtomicType *Ty, llvm::DIFile *U) { | |||
2631 | auto *FromTy = getOrCreateType(Ty->getValueType(), U); | |||
2632 | return DBuilder.createQualifiedType(llvm::dwarf::DW_TAG_atomic_type, FromTy); | |||
2633 | } | |||
2634 | ||||
2635 | llvm::DIType *CGDebugInfo::CreateType(const PipeType *Ty, llvm::DIFile *U) { | |||
2636 | return getOrCreateType(Ty->getElementType(), U); | |||
2637 | } | |||
2638 | ||||
2639 | llvm::DIType *CGDebugInfo::CreateEnumType(const EnumType *Ty) { | |||
2640 | const EnumDecl *ED = Ty->getDecl(); | |||
2641 | ||||
2642 | uint64_t Size = 0; | |||
2643 | uint32_t Align = 0; | |||
2644 | if (!ED->getTypeForDecl()->isIncompleteType()) { | |||
2645 | Size = CGM.getContext().getTypeSize(ED->getTypeForDecl()); | |||
2646 | Align = getDeclAlignIfRequired(ED, CGM.getContext()); | |||
2647 | } | |||
2648 | ||||
2649 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
2650 | ||||
2651 | bool isImportedFromModule = | |||
2652 | DebugTypeExtRefs && ED->isFromASTFile() && ED->getDefinition(); | |||
2653 | ||||
2654 | // If this is just a forward declaration, construct an appropriately | |||
2655 | // marked node and just return it. | |||
2656 | if (isImportedFromModule || !ED->getDefinition()) { | |||
2657 | // Note that it is possible for enums to be created as part of | |||
2658 | // their own declcontext. In this case a FwdDecl will be created | |||
2659 | // twice. This doesn't cause a problem because both FwdDecls are | |||
2660 | // entered into the ReplaceMap: finalize() will replace the first | |||
2661 | // FwdDecl with the second and then replace the second with | |||
2662 | // complete type. | |||
2663 | llvm::DIScope *EDContext = getDeclContextDescriptor(ED); | |||
2664 | llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation()); | |||
2665 | llvm::TempDIScope TmpContext(DBuilder.createReplaceableCompositeType( | |||
2666 | llvm::dwarf::DW_TAG_enumeration_type, "", TheCU, DefUnit, 0)); | |||
2667 | ||||
2668 | unsigned Line = getLineNumber(ED->getLocation()); | |||
2669 | StringRef EDName = ED->getName(); | |||
2670 | llvm::DIType *RetTy = DBuilder.createReplaceableCompositeType( | |||
2671 | llvm::dwarf::DW_TAG_enumeration_type, EDName, EDContext, DefUnit, Line, | |||
2672 | 0, Size, Align, llvm::DINode::FlagFwdDecl, Identifier); | |||
2673 | ||||
2674 | ReplaceMap.emplace_back( | |||
2675 | std::piecewise_construct, std::make_tuple(Ty), | |||
2676 | std::make_tuple(static_cast<llvm::Metadata *>(RetTy))); | |||
2677 | return RetTy; | |||
2678 | } | |||
2679 | ||||
2680 | return CreateTypeDefinition(Ty); | |||
2681 | } | |||
2682 | ||||
2683 | llvm::DIType *CGDebugInfo::CreateTypeDefinition(const EnumType *Ty) { | |||
2684 | const EnumDecl *ED = Ty->getDecl(); | |||
2685 | uint64_t Size = 0; | |||
2686 | uint32_t Align = 0; | |||
2687 | if (!ED->getTypeForDecl()->isIncompleteType()) { | |||
2688 | Size = CGM.getContext().getTypeSize(ED->getTypeForDecl()); | |||
2689 | Align = getDeclAlignIfRequired(ED, CGM.getContext()); | |||
2690 | } | |||
2691 | ||||
2692 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
2693 | ||||
2694 | // Create elements for each enumerator. | |||
2695 | SmallVector<llvm::Metadata *, 16> Enumerators; | |||
2696 | ED = ED->getDefinition(); | |||
2697 | bool IsSigned = ED->getIntegerType()->isSignedIntegerType(); | |||
2698 | for (const auto *Enum : ED->enumerators()) { | |||
2699 | const auto &InitVal = Enum->getInitVal(); | |||
2700 | auto Value = IsSigned ? InitVal.getSExtValue() : InitVal.getZExtValue(); | |||
2701 | Enumerators.push_back( | |||
2702 | DBuilder.createEnumerator(Enum->getName(), Value, !IsSigned)); | |||
2703 | } | |||
2704 | ||||
2705 | // Return a CompositeType for the enum itself. | |||
2706 | llvm::DINodeArray EltArray = DBuilder.getOrCreateArray(Enumerators); | |||
2707 | ||||
2708 | llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation()); | |||
2709 | unsigned Line = getLineNumber(ED->getLocation()); | |||
2710 | llvm::DIScope *EnumContext = getDeclContextDescriptor(ED); | |||
2711 | llvm::DIType *ClassTy = getOrCreateType(ED->getIntegerType(), DefUnit); | |||
2712 | return DBuilder.createEnumerationType(EnumContext, ED->getName(), DefUnit, | |||
2713 | Line, Size, Align, EltArray, ClassTy, | |||
2714 | Identifier, ED->isFixed()); | |||
2715 | } | |||
2716 | ||||
2717 | llvm::DIMacro *CGDebugInfo::CreateMacro(llvm::DIMacroFile *Parent, | |||
2718 | unsigned MType, SourceLocation LineLoc, | |||
2719 | StringRef Name, StringRef Value) { | |||
2720 | unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc); | |||
2721 | return DBuilder.createMacro(Parent, Line, MType, Name, Value); | |||
2722 | } | |||
2723 | ||||
2724 | llvm::DIMacroFile *CGDebugInfo::CreateTempMacroFile(llvm::DIMacroFile *Parent, | |||
2725 | SourceLocation LineLoc, | |||
2726 | SourceLocation FileLoc) { | |||
2727 | llvm::DIFile *FName = getOrCreateFile(FileLoc); | |||
2728 | unsigned Line = LineLoc.isInvalid() ? 0 : getLineNumber(LineLoc); | |||
2729 | return DBuilder.createTempMacroFile(Parent, Line, FName); | |||
2730 | } | |||
2731 | ||||
2732 | static QualType UnwrapTypeForDebugInfo(QualType T, const ASTContext &C) { | |||
2733 | Qualifiers Quals; | |||
2734 | do { | |||
2735 | Qualifiers InnerQuals = T.getLocalQualifiers(); | |||
2736 | // Qualifiers::operator+() doesn't like it if you add a Qualifier | |||
2737 | // that is already there. | |||
2738 | Quals += Qualifiers::removeCommonQualifiers(Quals, InnerQuals); | |||
2739 | Quals += InnerQuals; | |||
2740 | QualType LastT = T; | |||
2741 | switch (T->getTypeClass()) { | |||
2742 | default: | |||
2743 | return C.getQualifiedType(T.getTypePtr(), Quals); | |||
2744 | case Type::TemplateSpecialization: { | |||
2745 | const auto *Spec = cast<TemplateSpecializationType>(T); | |||
2746 | if (Spec->isTypeAlias()) | |||
2747 | return C.getQualifiedType(T.getTypePtr(), Quals); | |||
2748 | T = Spec->desugar(); | |||
2749 | break; | |||
2750 | } | |||
2751 | case Type::TypeOfExpr: | |||
2752 | T = cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType(); | |||
2753 | break; | |||
2754 | case Type::TypeOf: | |||
2755 | T = cast<TypeOfType>(T)->getUnderlyingType(); | |||
2756 | break; | |||
2757 | case Type::Decltype: | |||
2758 | T = cast<DecltypeType>(T)->getUnderlyingType(); | |||
2759 | break; | |||
2760 | case Type::UnaryTransform: | |||
2761 | T = cast<UnaryTransformType>(T)->getUnderlyingType(); | |||
2762 | break; | |||
2763 | case Type::Attributed: | |||
2764 | T = cast<AttributedType>(T)->getEquivalentType(); | |||
2765 | break; | |||
2766 | case Type::Elaborated: | |||
2767 | T = cast<ElaboratedType>(T)->getNamedType(); | |||
2768 | break; | |||
2769 | case Type::Paren: | |||
2770 | T = cast<ParenType>(T)->getInnerType(); | |||
2771 | break; | |||
2772 | case Type::SubstTemplateTypeParm: | |||
2773 | T = cast<SubstTemplateTypeParmType>(T)->getReplacementType(); | |||
2774 | break; | |||
2775 | case Type::Auto: | |||
2776 | case Type::DeducedTemplateSpecialization: { | |||
2777 | QualType DT = cast<DeducedType>(T)->getDeducedType(); | |||
2778 | assert(!DT.isNull() && "Undeduced types shouldn't reach here.")((!DT.isNull() && "Undeduced types shouldn't reach here." ) ? static_cast<void> (0) : __assert_fail ("!DT.isNull() && \"Undeduced types shouldn't reach here.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2778, __PRETTY_FUNCTION__)); | |||
2779 | T = DT; | |||
2780 | break; | |||
2781 | } | |||
2782 | case Type::Adjusted: | |||
2783 | case Type::Decayed: | |||
2784 | // Decayed and adjusted types use the adjusted type in LLVM and DWARF. | |||
2785 | T = cast<AdjustedType>(T)->getAdjustedType(); | |||
2786 | break; | |||
2787 | } | |||
2788 | ||||
2789 | assert(T != LastT && "Type unwrapping failed to unwrap!")((T != LastT && "Type unwrapping failed to unwrap!") ? static_cast<void> (0) : __assert_fail ("T != LastT && \"Type unwrapping failed to unwrap!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2789, __PRETTY_FUNCTION__)); | |||
2790 | (void)LastT; | |||
2791 | } while (true); | |||
2792 | } | |||
2793 | ||||
2794 | llvm::DIType *CGDebugInfo::getTypeOrNull(QualType Ty) { | |||
2795 | ||||
2796 | // Unwrap the type as needed for debug information. | |||
2797 | Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext()); | |||
2798 | ||||
2799 | auto It = TypeCache.find(Ty.getAsOpaquePtr()); | |||
2800 | if (It != TypeCache.end()) { | |||
2801 | // Verify that the debug info still exists. | |||
2802 | if (llvm::Metadata *V = It->second) | |||
2803 | return cast<llvm::DIType>(V); | |||
2804 | } | |||
2805 | ||||
2806 | return nullptr; | |||
2807 | } | |||
2808 | ||||
2809 | void CGDebugInfo::completeTemplateDefinition( | |||
2810 | const ClassTemplateSpecializationDecl &SD) { | |||
2811 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
2812 | return; | |||
2813 | completeUnusedClass(SD); | |||
2814 | } | |||
2815 | ||||
2816 | void CGDebugInfo::completeUnusedClass(const CXXRecordDecl &D) { | |||
2817 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
2818 | return; | |||
2819 | ||||
2820 | completeClassData(&D); | |||
2821 | // In case this type has no member function definitions being emitted, ensure | |||
2822 | // it is retained | |||
2823 | RetainedTypes.push_back(CGM.getContext().getRecordType(&D).getAsOpaquePtr()); | |||
2824 | } | |||
2825 | ||||
2826 | llvm::DIType *CGDebugInfo::getOrCreateType(QualType Ty, llvm::DIFile *Unit) { | |||
2827 | if (Ty.isNull()) | |||
2828 | return nullptr; | |||
2829 | ||||
2830 | // Unwrap the type as needed for debug information. | |||
2831 | Ty = UnwrapTypeForDebugInfo(Ty, CGM.getContext()); | |||
2832 | ||||
2833 | if (auto *T = getTypeOrNull(Ty)) | |||
2834 | return T; | |||
2835 | ||||
2836 | llvm::DIType *Res = CreateTypeNode(Ty, Unit); | |||
2837 | void *TyPtr = Ty.getAsOpaquePtr(); | |||
2838 | ||||
2839 | // And update the type cache. | |||
2840 | TypeCache[TyPtr].reset(Res); | |||
2841 | ||||
2842 | return Res; | |||
2843 | } | |||
2844 | ||||
2845 | llvm::DIModule *CGDebugInfo::getParentModuleOrNull(const Decl *D) { | |||
2846 | // A forward declaration inside a module header does not belong to the module. | |||
2847 | if (isa<RecordDecl>(D) && !cast<RecordDecl>(D)->getDefinition()) | |||
2848 | return nullptr; | |||
2849 | if (DebugTypeExtRefs && D->isFromASTFile()) { | |||
2850 | // Record a reference to an imported clang module or precompiled header. | |||
2851 | auto *Reader = CGM.getContext().getExternalSource(); | |||
2852 | auto Idx = D->getOwningModuleID(); | |||
2853 | auto Info = Reader->getSourceDescriptor(Idx); | |||
2854 | if (Info) | |||
2855 | return getOrCreateModuleRef(*Info, /*SkeletonCU=*/true); | |||
2856 | } else if (ClangModuleMap) { | |||
2857 | // We are building a clang module or a precompiled header. | |||
2858 | // | |||
2859 | // TODO: When D is a CXXRecordDecl or a C++ Enum, the ODR applies | |||
2860 | // and it wouldn't be necessary to specify the parent scope | |||
2861 | // because the type is already unique by definition (it would look | |||
2862 | // like the output of -fno-standalone-debug). On the other hand, | |||
2863 | // the parent scope helps a consumer to quickly locate the object | |||
2864 | // file where the type's definition is located, so it might be | |||
2865 | // best to make this behavior a command line or debugger tuning | |||
2866 | // option. | |||
2867 | if (Module *M = D->getOwningModule()) { | |||
2868 | // This is a (sub-)module. | |||
2869 | auto Info = ExternalASTSource::ASTSourceDescriptor(*M); | |||
2870 | return getOrCreateModuleRef(Info, /*SkeletonCU=*/false); | |||
2871 | } else { | |||
2872 | // This the precompiled header being built. | |||
2873 | return getOrCreateModuleRef(PCHDescriptor, /*SkeletonCU=*/false); | |||
2874 | } | |||
2875 | } | |||
2876 | ||||
2877 | return nullptr; | |||
2878 | } | |||
2879 | ||||
2880 | llvm::DIType *CGDebugInfo::CreateTypeNode(QualType Ty, llvm::DIFile *Unit) { | |||
2881 | // Handle qualifiers, which recursively handles what they refer to. | |||
2882 | if (Ty.hasLocalQualifiers()) | |||
2883 | return CreateQualifiedType(Ty, Unit); | |||
2884 | ||||
2885 | // Work out details of type. | |||
2886 | switch (Ty->getTypeClass()) { | |||
2887 | #define TYPE(Class, Base) | |||
2888 | #define ABSTRACT_TYPE(Class, Base) | |||
2889 | #define NON_CANONICAL_TYPE(Class, Base) | |||
2890 | #define DEPENDENT_TYPE(Class, Base) case Type::Class: | |||
2891 | #include "clang/AST/TypeNodes.def" | |||
2892 | llvm_unreachable("Dependent types cannot show up in debug information")::llvm::llvm_unreachable_internal("Dependent types cannot show up in debug information" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2892); | |||
2893 | ||||
2894 | case Type::ExtVector: | |||
2895 | case Type::Vector: | |||
2896 | return CreateType(cast<VectorType>(Ty), Unit); | |||
2897 | case Type::ObjCObjectPointer: | |||
2898 | return CreateType(cast<ObjCObjectPointerType>(Ty), Unit); | |||
2899 | case Type::ObjCObject: | |||
2900 | return CreateType(cast<ObjCObjectType>(Ty), Unit); | |||
2901 | case Type::ObjCTypeParam: | |||
2902 | return CreateType(cast<ObjCTypeParamType>(Ty), Unit); | |||
2903 | case Type::ObjCInterface: | |||
2904 | return CreateType(cast<ObjCInterfaceType>(Ty), Unit); | |||
2905 | case Type::Builtin: | |||
2906 | return CreateType(cast<BuiltinType>(Ty)); | |||
2907 | case Type::Complex: | |||
2908 | return CreateType(cast<ComplexType>(Ty)); | |||
2909 | case Type::Pointer: | |||
2910 | return CreateType(cast<PointerType>(Ty), Unit); | |||
2911 | case Type::BlockPointer: | |||
2912 | return CreateType(cast<BlockPointerType>(Ty), Unit); | |||
2913 | case Type::Typedef: | |||
2914 | return CreateType(cast<TypedefType>(Ty), Unit); | |||
2915 | case Type::Record: | |||
2916 | return CreateType(cast<RecordType>(Ty)); | |||
2917 | case Type::Enum: | |||
2918 | return CreateEnumType(cast<EnumType>(Ty)); | |||
2919 | case Type::FunctionProto: | |||
2920 | case Type::FunctionNoProto: | |||
2921 | return CreateType(cast<FunctionType>(Ty), Unit); | |||
2922 | case Type::ConstantArray: | |||
2923 | case Type::VariableArray: | |||
2924 | case Type::IncompleteArray: | |||
2925 | return CreateType(cast<ArrayType>(Ty), Unit); | |||
2926 | ||||
2927 | case Type::LValueReference: | |||
2928 | return CreateType(cast<LValueReferenceType>(Ty), Unit); | |||
2929 | case Type::RValueReference: | |||
2930 | return CreateType(cast<RValueReferenceType>(Ty), Unit); | |||
2931 | ||||
2932 | case Type::MemberPointer: | |||
2933 | return CreateType(cast<MemberPointerType>(Ty), Unit); | |||
2934 | ||||
2935 | case Type::Atomic: | |||
2936 | return CreateType(cast<AtomicType>(Ty), Unit); | |||
2937 | ||||
2938 | case Type::Pipe: | |||
2939 | return CreateType(cast<PipeType>(Ty), Unit); | |||
2940 | ||||
2941 | case Type::TemplateSpecialization: | |||
2942 | return CreateType(cast<TemplateSpecializationType>(Ty), Unit); | |||
2943 | ||||
2944 | case Type::Auto: | |||
2945 | case Type::Attributed: | |||
2946 | case Type::Adjusted: | |||
2947 | case Type::Decayed: | |||
2948 | case Type::DeducedTemplateSpecialization: | |||
2949 | case Type::Elaborated: | |||
2950 | case Type::Paren: | |||
2951 | case Type::SubstTemplateTypeParm: | |||
2952 | case Type::TypeOfExpr: | |||
2953 | case Type::TypeOf: | |||
2954 | case Type::Decltype: | |||
2955 | case Type::UnaryTransform: | |||
2956 | case Type::PackExpansion: | |||
2957 | break; | |||
2958 | } | |||
2959 | ||||
2960 | llvm_unreachable("type should have been unwrapped!")::llvm::llvm_unreachable_internal("type should have been unwrapped!" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 2960); | |||
2961 | } | |||
2962 | ||||
2963 | llvm::DICompositeType *CGDebugInfo::getOrCreateLimitedType(const RecordType *Ty, | |||
2964 | llvm::DIFile *Unit) { | |||
2965 | QualType QTy(Ty, 0); | |||
2966 | ||||
2967 | auto *T = cast_or_null<llvm::DICompositeType>(getTypeOrNull(QTy)); | |||
2968 | ||||
2969 | // We may have cached a forward decl when we could have created | |||
2970 | // a non-forward decl. Go ahead and create a non-forward decl | |||
2971 | // now. | |||
2972 | if (T && !T->isForwardDecl()) | |||
2973 | return T; | |||
2974 | ||||
2975 | // Otherwise create the type. | |||
2976 | llvm::DICompositeType *Res = CreateLimitedType(Ty); | |||
2977 | ||||
2978 | // Propagate members from the declaration to the definition | |||
2979 | // CreateType(const RecordType*) will overwrite this with the members in the | |||
2980 | // correct order if the full type is needed. | |||
2981 | DBuilder.replaceArrays(Res, T ? T->getElements() : llvm::DINodeArray()); | |||
2982 | ||||
2983 | // And update the type cache. | |||
2984 | TypeCache[QTy.getAsOpaquePtr()].reset(Res); | |||
2985 | return Res; | |||
2986 | } | |||
2987 | ||||
2988 | // TODO: Currently used for context chains when limiting debug info. | |||
2989 | llvm::DICompositeType *CGDebugInfo::CreateLimitedType(const RecordType *Ty) { | |||
2990 | RecordDecl *RD = Ty->getDecl(); | |||
2991 | ||||
2992 | // Get overall information about the record type for the debug info. | |||
2993 | llvm::DIFile *DefUnit = getOrCreateFile(RD->getLocation()); | |||
2994 | unsigned Line = getLineNumber(RD->getLocation()); | |||
2995 | StringRef RDName = getClassName(RD); | |||
2996 | ||||
2997 | llvm::DIScope *RDContext = getDeclContextDescriptor(RD); | |||
2998 | ||||
2999 | // If we ended up creating the type during the context chain construction, | |||
3000 | // just return that. | |||
3001 | auto *T = cast_or_null<llvm::DICompositeType>( | |||
3002 | getTypeOrNull(CGM.getContext().getRecordType(RD))); | |||
3003 | if (T && (!T->isForwardDecl() || !RD->getDefinition())) | |||
3004 | return T; | |||
3005 | ||||
3006 | // If this is just a forward or incomplete declaration, construct an | |||
3007 | // appropriately marked node and just return it. | |||
3008 | const RecordDecl *D = RD->getDefinition(); | |||
3009 | if (!D || !D->isCompleteDefinition()) | |||
3010 | return getOrCreateRecordFwdDecl(Ty, RDContext); | |||
3011 | ||||
3012 | uint64_t Size = CGM.getContext().getTypeSize(Ty); | |||
3013 | auto Align = getDeclAlignIfRequired(D, CGM.getContext()); | |||
3014 | ||||
3015 | SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU); | |||
3016 | ||||
3017 | // Explicitly record the calling convention for C++ records. | |||
3018 | auto Flags = llvm::DINode::FlagZero; | |||
3019 | if (auto CXXRD = dyn_cast<CXXRecordDecl>(RD)) { | |||
3020 | if (CGM.getCXXABI().getRecordArgABI(CXXRD) == CGCXXABI::RAA_Indirect) | |||
3021 | Flags |= llvm::DINode::FlagTypePassByReference; | |||
3022 | else | |||
3023 | Flags |= llvm::DINode::FlagTypePassByValue; | |||
3024 | ||||
3025 | // Record if a C++ record is trivial type. | |||
3026 | if (CXXRD->isTrivial()) | |||
3027 | Flags |= llvm::DINode::FlagTrivial; | |||
3028 | } | |||
3029 | ||||
3030 | llvm::DICompositeType *RealDecl = DBuilder.createReplaceableCompositeType( | |||
3031 | getTagForRecord(RD), RDName, RDContext, DefUnit, Line, 0, Size, Align, | |||
3032 | Flags, Identifier); | |||
3033 | ||||
3034 | // Elements of composite types usually have back to the type, creating | |||
3035 | // uniquing cycles. Distinct nodes are more efficient. | |||
3036 | switch (RealDecl->getTag()) { | |||
3037 | default: | |||
3038 | llvm_unreachable("invalid composite type tag")::llvm::llvm_unreachable_internal("invalid composite type tag" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3038); | |||
3039 | ||||
3040 | case llvm::dwarf::DW_TAG_array_type: | |||
3041 | case llvm::dwarf::DW_TAG_enumeration_type: | |||
3042 | // Array elements and most enumeration elements don't have back references, | |||
3043 | // so they don't tend to be involved in uniquing cycles and there is some | |||
3044 | // chance of merging them when linking together two modules. Only make | |||
3045 | // them distinct if they are ODR-uniqued. | |||
3046 | if (Identifier.empty()) | |||
3047 | break; | |||
3048 | LLVM_FALLTHROUGH[[clang::fallthrough]]; | |||
3049 | ||||
3050 | case llvm::dwarf::DW_TAG_structure_type: | |||
3051 | case llvm::dwarf::DW_TAG_union_type: | |||
3052 | case llvm::dwarf::DW_TAG_class_type: | |||
3053 | // Immediately resolve to a distinct node. | |||
3054 | RealDecl = | |||
3055 | llvm::MDNode::replaceWithDistinct(llvm::TempDICompositeType(RealDecl)); | |||
3056 | break; | |||
3057 | } | |||
3058 | ||||
3059 | RegionMap[Ty->getDecl()].reset(RealDecl); | |||
3060 | TypeCache[QualType(Ty, 0).getAsOpaquePtr()].reset(RealDecl); | |||
3061 | ||||
3062 | if (const auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD)) | |||
3063 | DBuilder.replaceArrays(RealDecl, llvm::DINodeArray(), | |||
3064 | CollectCXXTemplateParams(TSpecial, DefUnit)); | |||
3065 | return RealDecl; | |||
3066 | } | |||
3067 | ||||
3068 | void CGDebugInfo::CollectContainingType(const CXXRecordDecl *RD, | |||
3069 | llvm::DICompositeType *RealDecl) { | |||
3070 | // A class's primary base or the class itself contains the vtable. | |||
3071 | llvm::DICompositeType *ContainingType = nullptr; | |||
3072 | const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD); | |||
3073 | if (const CXXRecordDecl *PBase = RL.getPrimaryBase()) { | |||
3074 | // Seek non-virtual primary base root. | |||
3075 | while (1) { | |||
3076 | const ASTRecordLayout &BRL = CGM.getContext().getASTRecordLayout(PBase); | |||
3077 | const CXXRecordDecl *PBT = BRL.getPrimaryBase(); | |||
3078 | if (PBT && !BRL.isPrimaryBaseVirtual()) | |||
3079 | PBase = PBT; | |||
3080 | else | |||
3081 | break; | |||
3082 | } | |||
3083 | ContainingType = cast<llvm::DICompositeType>( | |||
3084 | getOrCreateType(QualType(PBase->getTypeForDecl(), 0), | |||
3085 | getOrCreateFile(RD->getLocation()))); | |||
3086 | } else if (RD->isDynamicClass()) | |||
3087 | ContainingType = RealDecl; | |||
3088 | ||||
3089 | DBuilder.replaceVTableHolder(RealDecl, ContainingType); | |||
3090 | } | |||
3091 | ||||
3092 | llvm::DIType *CGDebugInfo::CreateMemberType(llvm::DIFile *Unit, QualType FType, | |||
3093 | StringRef Name, uint64_t *Offset) { | |||
3094 | llvm::DIType *FieldTy = CGDebugInfo::getOrCreateType(FType, Unit); | |||
3095 | uint64_t FieldSize = CGM.getContext().getTypeSize(FType); | |||
3096 | auto FieldAlign = getTypeAlignIfRequired(FType, CGM.getContext()); | |||
3097 | llvm::DIType *Ty = | |||
3098 | DBuilder.createMemberType(Unit, Name, Unit, 0, FieldSize, FieldAlign, | |||
3099 | *Offset, llvm::DINode::FlagZero, FieldTy); | |||
3100 | *Offset += FieldSize; | |||
3101 | return Ty; | |||
3102 | } | |||
3103 | ||||
3104 | void CGDebugInfo::collectFunctionDeclProps(GlobalDecl GD, llvm::DIFile *Unit, | |||
3105 | StringRef &Name, | |||
3106 | StringRef &LinkageName, | |||
3107 | llvm::DIScope *&FDContext, | |||
3108 | llvm::DINodeArray &TParamsArray, | |||
3109 | llvm::DINode::DIFlags &Flags) { | |||
3110 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3111 | Name = getFunctionName(FD); | |||
3112 | // Use mangled name as linkage name for C/C++ functions. | |||
3113 | if (FD->hasPrototype()) { | |||
3114 | LinkageName = CGM.getMangledName(GD); | |||
3115 | Flags |= llvm::DINode::FlagPrototyped; | |||
3116 | } | |||
3117 | // No need to replicate the linkage name if it isn't different from the | |||
3118 | // subprogram name, no need to have it at all unless coverage is enabled or | |||
3119 | // debug is set to more than just line tables or extra debug info is needed. | |||
3120 | if (LinkageName == Name || (!CGM.getCodeGenOpts().EmitGcovArcs && | |||
3121 | !CGM.getCodeGenOpts().EmitGcovNotes && | |||
3122 | !CGM.getCodeGenOpts().DebugInfoForProfiling && | |||
3123 | DebugKind <= codegenoptions::DebugLineTablesOnly)) | |||
3124 | LinkageName = StringRef(); | |||
3125 | ||||
3126 | if (DebugKind >= codegenoptions::LimitedDebugInfo) { | |||
3127 | if (const NamespaceDecl *NSDecl = | |||
3128 | dyn_cast_or_null<NamespaceDecl>(FD->getDeclContext())) | |||
3129 | FDContext = getOrCreateNamespace(NSDecl); | |||
3130 | else if (const RecordDecl *RDecl = | |||
3131 | dyn_cast_or_null<RecordDecl>(FD->getDeclContext())) { | |||
3132 | llvm::DIScope *Mod = getParentModuleOrNull(RDecl); | |||
3133 | FDContext = getContextDescriptor(RDecl, Mod ? Mod : TheCU); | |||
3134 | } | |||
3135 | // Check if it is a noreturn-marked function | |||
3136 | if (FD->isNoReturn()) | |||
3137 | Flags |= llvm::DINode::FlagNoReturn; | |||
3138 | // Collect template parameters. | |||
3139 | TParamsArray = CollectFunctionTemplateParams(FD, Unit); | |||
3140 | } | |||
3141 | } | |||
3142 | ||||
3143 | void CGDebugInfo::collectVarDeclProps(const VarDecl *VD, llvm::DIFile *&Unit, | |||
3144 | unsigned &LineNo, QualType &T, | |||
3145 | StringRef &Name, StringRef &LinkageName, | |||
3146 | llvm::MDTuple *&TemplateParameters, | |||
3147 | llvm::DIScope *&VDContext) { | |||
3148 | Unit = getOrCreateFile(VD->getLocation()); | |||
3149 | LineNo = getLineNumber(VD->getLocation()); | |||
3150 | ||||
3151 | setLocation(VD->getLocation()); | |||
3152 | ||||
3153 | T = VD->getType(); | |||
3154 | if (T->isIncompleteArrayType()) { | |||
3155 | // CodeGen turns int[] into int[1] so we'll do the same here. | |||
3156 | llvm::APInt ConstVal(32, 1); | |||
3157 | QualType ET = CGM.getContext().getAsArrayType(T)->getElementType(); | |||
3158 | ||||
3159 | T = CGM.getContext().getConstantArrayType(ET, ConstVal, ArrayType::Normal, | |||
3160 | 0); | |||
3161 | } | |||
3162 | ||||
3163 | Name = VD->getName(); | |||
3164 | if (VD->getDeclContext() && !isa<FunctionDecl>(VD->getDeclContext()) && | |||
3165 | !isa<ObjCMethodDecl>(VD->getDeclContext())) | |||
3166 | LinkageName = CGM.getMangledName(VD); | |||
3167 | if (LinkageName == Name) | |||
3168 | LinkageName = StringRef(); | |||
3169 | ||||
3170 | if (isa<VarTemplateSpecializationDecl>(VD)) { | |||
3171 | llvm::DINodeArray parameterNodes = CollectVarTemplateParams(VD, &*Unit); | |||
3172 | TemplateParameters = parameterNodes.get(); | |||
3173 | } else { | |||
3174 | TemplateParameters = nullptr; | |||
3175 | } | |||
3176 | ||||
3177 | // Since we emit declarations (DW_AT_members) for static members, place the | |||
3178 | // definition of those static members in the namespace they were declared in | |||
3179 | // in the source code (the lexical decl context). | |||
3180 | // FIXME: Generalize this for even non-member global variables where the | |||
3181 | // declaration and definition may have different lexical decl contexts, once | |||
3182 | // we have support for emitting declarations of (non-member) global variables. | |||
3183 | const DeclContext *DC = VD->isStaticDataMember() ? VD->getLexicalDeclContext() | |||
3184 | : VD->getDeclContext(); | |||
3185 | // When a record type contains an in-line initialization of a static data | |||
3186 | // member, and the record type is marked as __declspec(dllexport), an implicit | |||
3187 | // definition of the member will be created in the record context. DWARF | |||
3188 | // doesn't seem to have a nice way to describe this in a form that consumers | |||
3189 | // are likely to understand, so fake the "normal" situation of a definition | |||
3190 | // outside the class by putting it in the global scope. | |||
3191 | if (DC->isRecord()) | |||
3192 | DC = CGM.getContext().getTranslationUnitDecl(); | |||
3193 | ||||
3194 | llvm::DIScope *Mod = getParentModuleOrNull(VD); | |||
3195 | VDContext = getContextDescriptor(cast<Decl>(DC), Mod ? Mod : TheCU); | |||
3196 | } | |||
3197 | ||||
3198 | llvm::DISubprogram *CGDebugInfo::getFunctionFwdDeclOrStub(GlobalDecl GD, | |||
3199 | bool Stub) { | |||
3200 | llvm::DINodeArray TParamsArray; | |||
3201 | StringRef Name, LinkageName; | |||
3202 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3203 | llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero; | |||
3204 | SourceLocation Loc = GD.getDecl()->getLocation(); | |||
3205 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3206 | llvm::DIScope *DContext = Unit; | |||
3207 | unsigned Line = getLineNumber(Loc); | |||
3208 | collectFunctionDeclProps(GD, Unit, Name, LinkageName, DContext, TParamsArray, | |||
3209 | Flags); | |||
3210 | auto *FD = dyn_cast<FunctionDecl>(GD.getDecl()); | |||
3211 | ||||
3212 | // Build function type. | |||
3213 | SmallVector<QualType, 16> ArgTypes; | |||
3214 | if (FD) | |||
3215 | for (const ParmVarDecl *Parm : FD->parameters()) | |||
3216 | ArgTypes.push_back(Parm->getType()); | |||
3217 | CallingConv CC = FD->getType()->castAs<FunctionType>()->getCallConv(); | |||
3218 | QualType FnType = CGM.getContext().getFunctionType( | |||
3219 | FD->getReturnType(), ArgTypes, FunctionProtoType::ExtProtoInfo(CC)); | |||
3220 | if (!FD->isExternallyVisible()) | |||
3221 | SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit; | |||
3222 | if (CGM.getLangOpts().Optimize) | |||
3223 | SPFlags |= llvm::DISubprogram::SPFlagOptimized; | |||
3224 | ||||
3225 | if (Stub) { | |||
3226 | Flags |= getCallSiteRelatedAttrs(); | |||
3227 | SPFlags |= llvm::DISubprogram::SPFlagDefinition; | |||
3228 | return DBuilder.createFunction( | |||
3229 | DContext, Name, LinkageName, Unit, Line, | |||
3230 | getOrCreateFunctionType(GD.getDecl(), FnType, Unit), 0, Flags, SPFlags, | |||
3231 | TParamsArray.get(), getFunctionDeclaration(FD)); | |||
3232 | } | |||
3233 | ||||
3234 | llvm::DISubprogram *SP = DBuilder.createTempFunctionFwdDecl( | |||
3235 | DContext, Name, LinkageName, Unit, Line, | |||
3236 | getOrCreateFunctionType(GD.getDecl(), FnType, Unit), 0, Flags, SPFlags, | |||
3237 | TParamsArray.get(), getFunctionDeclaration(FD)); | |||
3238 | const FunctionDecl *CanonDecl = FD->getCanonicalDecl(); | |||
3239 | FwdDeclReplaceMap.emplace_back(std::piecewise_construct, | |||
3240 | std::make_tuple(CanonDecl), | |||
3241 | std::make_tuple(SP)); | |||
3242 | return SP; | |||
3243 | } | |||
3244 | ||||
3245 | llvm::DISubprogram *CGDebugInfo::getFunctionForwardDeclaration(GlobalDecl GD) { | |||
3246 | return getFunctionFwdDeclOrStub(GD, /* Stub = */ false); | |||
3247 | } | |||
3248 | ||||
3249 | llvm::DISubprogram *CGDebugInfo::getFunctionStub(GlobalDecl GD) { | |||
3250 | return getFunctionFwdDeclOrStub(GD, /* Stub = */ true); | |||
3251 | } | |||
3252 | ||||
3253 | llvm::DIGlobalVariable * | |||
3254 | CGDebugInfo::getGlobalVariableForwardDeclaration(const VarDecl *VD) { | |||
3255 | QualType T; | |||
3256 | StringRef Name, LinkageName; | |||
3257 | SourceLocation Loc = VD->getLocation(); | |||
3258 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3259 | llvm::DIScope *DContext = Unit; | |||
3260 | unsigned Line = getLineNumber(Loc); | |||
3261 | llvm::MDTuple *TemplateParameters = nullptr; | |||
3262 | ||||
3263 | collectVarDeclProps(VD, Unit, Line, T, Name, LinkageName, TemplateParameters, | |||
3264 | DContext); | |||
3265 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
3266 | auto *GV = DBuilder.createTempGlobalVariableFwdDecl( | |||
3267 | DContext, Name, LinkageName, Unit, Line, getOrCreateType(T, Unit), | |||
3268 | !VD->isExternallyVisible(), nullptr, TemplateParameters, Align); | |||
3269 | FwdDeclReplaceMap.emplace_back( | |||
3270 | std::piecewise_construct, | |||
3271 | std::make_tuple(cast<VarDecl>(VD->getCanonicalDecl())), | |||
3272 | std::make_tuple(static_cast<llvm::Metadata *>(GV))); | |||
3273 | return GV; | |||
3274 | } | |||
3275 | ||||
3276 | llvm::DINode *CGDebugInfo::getDeclarationOrDefinition(const Decl *D) { | |||
3277 | // We only need a declaration (not a definition) of the type - so use whatever | |||
3278 | // we would otherwise do to get a type for a pointee. (forward declarations in | |||
3279 | // limited debug info, full definitions (if the type definition is available) | |||
3280 | // in unlimited debug info) | |||
3281 | if (const auto *TD = dyn_cast<TypeDecl>(D)) | |||
3282 | return getOrCreateType(CGM.getContext().getTypeDeclType(TD), | |||
3283 | getOrCreateFile(TD->getLocation())); | |||
3284 | auto I = DeclCache.find(D->getCanonicalDecl()); | |||
3285 | ||||
3286 | if (I != DeclCache.end()) { | |||
3287 | auto N = I->second; | |||
3288 | if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(N)) | |||
3289 | return GVE->getVariable(); | |||
3290 | return dyn_cast_or_null<llvm::DINode>(N); | |||
3291 | } | |||
3292 | ||||
3293 | // No definition for now. Emit a forward definition that might be | |||
3294 | // merged with a potential upcoming definition. | |||
3295 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) | |||
3296 | return getFunctionForwardDeclaration(FD); | |||
3297 | else if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
3298 | return getGlobalVariableForwardDeclaration(VD); | |||
3299 | ||||
3300 | return nullptr; | |||
3301 | } | |||
3302 | ||||
3303 | llvm::DISubprogram *CGDebugInfo::getFunctionDeclaration(const Decl *D) { | |||
3304 | if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3305 | return nullptr; | |||
3306 | ||||
3307 | const auto *FD = dyn_cast<FunctionDecl>(D); | |||
3308 | if (!FD) | |||
3309 | return nullptr; | |||
3310 | ||||
3311 | // Setup context. | |||
3312 | auto *S = getDeclContextDescriptor(D); | |||
3313 | ||||
3314 | auto MI = SPCache.find(FD->getCanonicalDecl()); | |||
3315 | if (MI == SPCache.end()) { | |||
3316 | if (const auto *MD = dyn_cast<CXXMethodDecl>(FD->getCanonicalDecl())) { | |||
3317 | return CreateCXXMemberFunction(MD, getOrCreateFile(MD->getLocation()), | |||
3318 | cast<llvm::DICompositeType>(S)); | |||
3319 | } | |||
3320 | } | |||
3321 | if (MI != SPCache.end()) { | |||
3322 | auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second); | |||
3323 | if (SP && !SP->isDefinition()) | |||
3324 | return SP; | |||
3325 | } | |||
3326 | ||||
3327 | for (auto NextFD : FD->redecls()) { | |||
3328 | auto MI = SPCache.find(NextFD->getCanonicalDecl()); | |||
3329 | if (MI != SPCache.end()) { | |||
3330 | auto *SP = dyn_cast_or_null<llvm::DISubprogram>(MI->second); | |||
3331 | if (SP && !SP->isDefinition()) | |||
3332 | return SP; | |||
3333 | } | |||
3334 | } | |||
3335 | return nullptr; | |||
3336 | } | |||
3337 | ||||
3338 | // getOrCreateFunctionType - Construct type. If it is a c++ method, include | |||
3339 | // implicit parameter "this". | |||
3340 | llvm::DISubroutineType *CGDebugInfo::getOrCreateFunctionType(const Decl *D, | |||
3341 | QualType FnType, | |||
3342 | llvm::DIFile *F) { | |||
3343 | if (!D || DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3344 | // Create fake but valid subroutine type. Otherwise -verify would fail, and | |||
3345 | // subprogram DIE will miss DW_AT_decl_file and DW_AT_decl_line fields. | |||
3346 | return DBuilder.createSubroutineType(DBuilder.getOrCreateTypeArray(None)); | |||
3347 | ||||
3348 | if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) | |||
3349 | return getOrCreateMethodType(Method, F); | |||
3350 | ||||
3351 | const auto *FTy = FnType->getAs<FunctionType>(); | |||
3352 | CallingConv CC = FTy ? FTy->getCallConv() : CallingConv::CC_C; | |||
3353 | ||||
3354 | if (const auto *OMethod = dyn_cast<ObjCMethodDecl>(D)) { | |||
3355 | // Add "self" and "_cmd" | |||
3356 | SmallVector<llvm::Metadata *, 16> Elts; | |||
3357 | ||||
3358 | // First element is always return type. For 'void' functions it is NULL. | |||
3359 | QualType ResultTy = OMethod->getReturnType(); | |||
3360 | ||||
3361 | // Replace the instancetype keyword with the actual type. | |||
3362 | if (ResultTy == CGM.getContext().getObjCInstanceType()) | |||
3363 | ResultTy = CGM.getContext().getPointerType( | |||
3364 | QualType(OMethod->getClassInterface()->getTypeForDecl(), 0)); | |||
3365 | ||||
3366 | Elts.push_back(getOrCreateType(ResultTy, F)); | |||
3367 | // "self" pointer is always first argument. | |||
3368 | QualType SelfDeclTy; | |||
3369 | if (auto *SelfDecl = OMethod->getSelfDecl()) | |||
3370 | SelfDeclTy = SelfDecl->getType(); | |||
3371 | else if (auto *FPT = dyn_cast<FunctionProtoType>(FnType)) | |||
3372 | if (FPT->getNumParams() > 1) | |||
3373 | SelfDeclTy = FPT->getParamType(0); | |||
3374 | if (!SelfDeclTy.isNull()) | |||
3375 | Elts.push_back( | |||
3376 | CreateSelfType(SelfDeclTy, getOrCreateType(SelfDeclTy, F))); | |||
3377 | // "_cmd" pointer is always second argument. | |||
3378 | Elts.push_back(DBuilder.createArtificialType( | |||
3379 | getOrCreateType(CGM.getContext().getObjCSelType(), F))); | |||
3380 | // Get rest of the arguments. | |||
3381 | for (const auto *PI : OMethod->parameters()) | |||
3382 | Elts.push_back(getOrCreateType(PI->getType(), F)); | |||
3383 | // Variadic methods need a special marker at the end of the type list. | |||
3384 | if (OMethod->isVariadic()) | |||
3385 | Elts.push_back(DBuilder.createUnspecifiedParameter()); | |||
3386 | ||||
3387 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(Elts); | |||
3388 | return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero, | |||
3389 | getDwarfCC(CC)); | |||
3390 | } | |||
3391 | ||||
3392 | // Handle variadic function types; they need an additional | |||
3393 | // unspecified parameter. | |||
3394 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) | |||
3395 | if (FD->isVariadic()) { | |||
3396 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
3397 | EltTys.push_back(getOrCreateType(FD->getReturnType(), F)); | |||
3398 | if (const auto *FPT = dyn_cast<FunctionProtoType>(FnType)) | |||
3399 | for (QualType ParamType : FPT->param_types()) | |||
3400 | EltTys.push_back(getOrCreateType(ParamType, F)); | |||
3401 | EltTys.push_back(DBuilder.createUnspecifiedParameter()); | |||
3402 | llvm::DITypeRefArray EltTypeArray = DBuilder.getOrCreateTypeArray(EltTys); | |||
3403 | return DBuilder.createSubroutineType(EltTypeArray, llvm::DINode::FlagZero, | |||
3404 | getDwarfCC(CC)); | |||
3405 | } | |||
3406 | ||||
3407 | return cast<llvm::DISubroutineType>(getOrCreateType(FnType, F)); | |||
3408 | } | |||
3409 | ||||
3410 | void CGDebugInfo::EmitFunctionStart(GlobalDecl GD, SourceLocation Loc, | |||
3411 | SourceLocation ScopeLoc, QualType FnType, | |||
3412 | llvm::Function *Fn, bool CurFuncIsThunk, | |||
3413 | CGBuilderTy &Builder) { | |||
3414 | ||||
3415 | StringRef Name; | |||
3416 | StringRef LinkageName; | |||
3417 | ||||
3418 | FnBeginRegionCount.push_back(LexicalBlockStack.size()); | |||
3419 | ||||
3420 | const Decl *D = GD.getDecl(); | |||
3421 | bool HasDecl = (D != nullptr); | |||
3422 | ||||
3423 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3424 | llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero; | |||
3425 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3426 | llvm::DIScope *FDContext = Unit; | |||
3427 | llvm::DINodeArray TParamsArray; | |||
3428 | if (!HasDecl) { | |||
3429 | // Use llvm function name. | |||
3430 | LinkageName = Fn->getName(); | |||
3431 | } else if (const auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
3432 | // If there is a subprogram for this function available then use it. | |||
3433 | auto FI = SPCache.find(FD->getCanonicalDecl()); | |||
3434 | if (FI != SPCache.end()) { | |||
3435 | auto *SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second); | |||
3436 | if (SP && SP->isDefinition()) { | |||
3437 | LexicalBlockStack.emplace_back(SP); | |||
3438 | RegionMap[D].reset(SP); | |||
3439 | return; | |||
3440 | } | |||
3441 | } | |||
3442 | collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext, | |||
3443 | TParamsArray, Flags); | |||
3444 | } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) { | |||
3445 | Name = getObjCMethodName(OMD); | |||
3446 | Flags |= llvm::DINode::FlagPrototyped; | |||
3447 | } else { | |||
3448 | // Use llvm function name. | |||
3449 | Name = Fn->getName(); | |||
3450 | Flags |= llvm::DINode::FlagPrototyped; | |||
3451 | } | |||
3452 | if (Name.startswith("\01")) | |||
3453 | Name = Name.substr(1); | |||
3454 | ||||
3455 | if (!HasDecl || D->isImplicit() || D->hasAttr<ArtificialAttr>()) { | |||
3456 | Flags |= llvm::DINode::FlagArtificial; | |||
3457 | // Artificial functions should not silently reuse CurLoc. | |||
3458 | CurLoc = SourceLocation(); | |||
3459 | } | |||
3460 | ||||
3461 | if (CurFuncIsThunk) | |||
3462 | Flags |= llvm::DINode::FlagThunk; | |||
3463 | ||||
3464 | if (Fn->hasLocalLinkage()) | |||
3465 | SPFlags |= llvm::DISubprogram::SPFlagLocalToUnit; | |||
3466 | if (CGM.getLangOpts().Optimize) | |||
3467 | SPFlags |= llvm::DISubprogram::SPFlagOptimized; | |||
3468 | ||||
3469 | llvm::DINode::DIFlags FlagsForDef = Flags | getCallSiteRelatedAttrs(); | |||
3470 | llvm::DISubprogram::DISPFlags SPFlagsForDef = | |||
3471 | SPFlags | llvm::DISubprogram::SPFlagDefinition; | |||
3472 | ||||
3473 | unsigned LineNo = getLineNumber(Loc); | |||
3474 | unsigned ScopeLine = getLineNumber(ScopeLoc); | |||
3475 | ||||
3476 | // FIXME: The function declaration we're constructing here is mostly reusing | |||
3477 | // declarations from CXXMethodDecl and not constructing new ones for arbitrary | |||
3478 | // FunctionDecls. When/if we fix this we can have FDContext be TheCU/null for | |||
3479 | // all subprograms instead of the actual context since subprogram definitions | |||
3480 | // are emitted as CU level entities by the backend. | |||
3481 | llvm::DISubprogram *SP = DBuilder.createFunction( | |||
3482 | FDContext, Name, LinkageName, Unit, LineNo, | |||
3483 | getOrCreateFunctionType(D, FnType, Unit), ScopeLine, FlagsForDef, | |||
3484 | SPFlagsForDef, TParamsArray.get(), getFunctionDeclaration(D)); | |||
3485 | Fn->setSubprogram(SP); | |||
3486 | // We might get here with a VarDecl in the case we're generating | |||
3487 | // code for the initialization of globals. Do not record these decls | |||
3488 | // as they will overwrite the actual VarDecl Decl in the cache. | |||
3489 | if (HasDecl && isa<FunctionDecl>(D)) | |||
3490 | DeclCache[D->getCanonicalDecl()].reset(SP); | |||
3491 | ||||
3492 | if (CGM.getCodeGenOpts().DwarfVersion >= 5) { | |||
3493 | // Starting with DWARF V5 method declarations are emitted as children of | |||
3494 | // the interface type. | |||
3495 | if (const auto *OMD = dyn_cast_or_null<ObjCMethodDecl>(D)) { | |||
3496 | const ObjCInterfaceDecl *ID = OMD->getClassInterface(); | |||
3497 | QualType QTy(ID->getTypeForDecl(), 0); | |||
3498 | auto It = TypeCache.find(QTy.getAsOpaquePtr()); | |||
3499 | if (It != TypeCache.end()) { | |||
3500 | llvm::DICompositeType *InterfaceDecl = | |||
3501 | cast<llvm::DICompositeType>(It->second); | |||
3502 | llvm::DISubprogram *FD = DBuilder.createFunction( | |||
3503 | InterfaceDecl, Name, LinkageName, Unit, LineNo, | |||
3504 | getOrCreateFunctionType(D, FnType, Unit), ScopeLine, Flags, SPFlags, | |||
3505 | TParamsArray.get()); | |||
3506 | DBuilder.finalizeSubprogram(FD); | |||
3507 | ObjCMethodCache[ID].push_back(FD); | |||
3508 | } | |||
3509 | } | |||
3510 | } | |||
3511 | ||||
3512 | // Push the function onto the lexical block stack. | |||
3513 | LexicalBlockStack.emplace_back(SP); | |||
3514 | ||||
3515 | if (HasDecl) | |||
3516 | RegionMap[D].reset(SP); | |||
3517 | } | |||
3518 | ||||
3519 | void CGDebugInfo::EmitFunctionDecl(GlobalDecl GD, SourceLocation Loc, | |||
3520 | QualType FnType) { | |||
3521 | StringRef Name; | |||
3522 | StringRef LinkageName; | |||
3523 | ||||
3524 | const Decl *D = GD.getDecl(); | |||
3525 | if (!D) | |||
3526 | return; | |||
3527 | ||||
3528 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3529 | llvm::DIFile *Unit = getOrCreateFile(Loc); | |||
3530 | llvm::DIScope *FDContext = getDeclContextDescriptor(D); | |||
3531 | llvm::DINodeArray TParamsArray; | |||
3532 | if (isa<FunctionDecl>(D)) { | |||
3533 | // If there is a DISubprogram for this function available then use it. | |||
3534 | collectFunctionDeclProps(GD, Unit, Name, LinkageName, FDContext, | |||
3535 | TParamsArray, Flags); | |||
3536 | } else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(D)) { | |||
3537 | Name = getObjCMethodName(OMD); | |||
3538 | Flags |= llvm::DINode::FlagPrototyped; | |||
3539 | } else { | |||
3540 | llvm_unreachable("not a function or ObjC method")::llvm::llvm_unreachable_internal("not a function or ObjC method" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3540); | |||
3541 | } | |||
3542 | if (!Name.empty() && Name[0] == '\01') | |||
3543 | Name = Name.substr(1); | |||
3544 | ||||
3545 | if (D->isImplicit()) { | |||
3546 | Flags |= llvm::DINode::FlagArtificial; | |||
3547 | // Artificial functions without a location should not silently reuse CurLoc. | |||
3548 | if (Loc.isInvalid()) | |||
3549 | CurLoc = SourceLocation(); | |||
3550 | } | |||
3551 | unsigned LineNo = getLineNumber(Loc); | |||
3552 | unsigned ScopeLine = 0; | |||
3553 | llvm::DISubprogram::DISPFlags SPFlags = llvm::DISubprogram::SPFlagZero; | |||
3554 | if (CGM.getLangOpts().Optimize) | |||
3555 | SPFlags |= llvm::DISubprogram::SPFlagOptimized; | |||
3556 | ||||
3557 | DBuilder.retainType(DBuilder.createFunction( | |||
3558 | FDContext, Name, LinkageName, Unit, LineNo, | |||
3559 | getOrCreateFunctionType(D, FnType, Unit), ScopeLine, Flags, SPFlags, | |||
3560 | TParamsArray.get(), getFunctionDeclaration(D))); | |||
3561 | } | |||
3562 | ||||
3563 | void CGDebugInfo::EmitInlineFunctionStart(CGBuilderTy &Builder, GlobalDecl GD) { | |||
3564 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3565 | // If there is a subprogram for this function available then use it. | |||
3566 | auto FI = SPCache.find(FD->getCanonicalDecl()); | |||
3567 | llvm::DISubprogram *SP = nullptr; | |||
3568 | if (FI != SPCache.end()) | |||
3569 | SP = dyn_cast_or_null<llvm::DISubprogram>(FI->second); | |||
3570 | if (!SP || !SP->isDefinition()) | |||
3571 | SP = getFunctionStub(GD); | |||
3572 | FnBeginRegionCount.push_back(LexicalBlockStack.size()); | |||
3573 | LexicalBlockStack.emplace_back(SP); | |||
3574 | setInlinedAt(Builder.getCurrentDebugLocation()); | |||
3575 | EmitLocation(Builder, FD->getLocation()); | |||
3576 | } | |||
3577 | ||||
3578 | void CGDebugInfo::EmitInlineFunctionEnd(CGBuilderTy &Builder) { | |||
3579 | assert(CurInlinedAt && "unbalanced inline scope stack")((CurInlinedAt && "unbalanced inline scope stack") ? static_cast <void> (0) : __assert_fail ("CurInlinedAt && \"unbalanced inline scope stack\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3579, __PRETTY_FUNCTION__)); | |||
3580 | EmitFunctionEnd(Builder, nullptr); | |||
3581 | setInlinedAt(llvm::DebugLoc(CurInlinedAt).getInlinedAt()); | |||
3582 | } | |||
3583 | ||||
3584 | void CGDebugInfo::EmitLocation(CGBuilderTy &Builder, SourceLocation Loc) { | |||
3585 | // Update our current location | |||
3586 | setLocation(Loc); | |||
3587 | ||||
3588 | if (CurLoc.isInvalid() || CurLoc.isMacroID() || LexicalBlockStack.empty()) | |||
3589 | return; | |||
3590 | ||||
3591 | llvm::MDNode *Scope = LexicalBlockStack.back(); | |||
3592 | Builder.SetCurrentDebugLocation(llvm::DebugLoc::get( | |||
3593 | getLineNumber(CurLoc), getColumnNumber(CurLoc), Scope, CurInlinedAt)); | |||
3594 | } | |||
3595 | ||||
3596 | void CGDebugInfo::CreateLexicalBlock(SourceLocation Loc) { | |||
3597 | llvm::MDNode *Back = nullptr; | |||
3598 | if (!LexicalBlockStack.empty()) | |||
3599 | Back = LexicalBlockStack.back().get(); | |||
3600 | LexicalBlockStack.emplace_back(DBuilder.createLexicalBlock( | |||
3601 | cast<llvm::DIScope>(Back), getOrCreateFile(CurLoc), getLineNumber(CurLoc), | |||
3602 | getColumnNumber(CurLoc))); | |||
3603 | } | |||
3604 | ||||
3605 | void CGDebugInfo::AppendAddressSpaceXDeref( | |||
3606 | unsigned AddressSpace, SmallVectorImpl<int64_t> &Expr) const { | |||
3607 | Optional<unsigned> DWARFAddressSpace = | |||
3608 | CGM.getTarget().getDWARFAddressSpace(AddressSpace); | |||
3609 | if (!DWARFAddressSpace) | |||
3610 | return; | |||
3611 | ||||
3612 | Expr.push_back(llvm::dwarf::DW_OP_constu); | |||
3613 | Expr.push_back(DWARFAddressSpace.getValue()); | |||
3614 | Expr.push_back(llvm::dwarf::DW_OP_swap); | |||
3615 | Expr.push_back(llvm::dwarf::DW_OP_xderef); | |||
3616 | } | |||
3617 | ||||
3618 | void CGDebugInfo::EmitLexicalBlockStart(CGBuilderTy &Builder, | |||
3619 | SourceLocation Loc) { | |||
3620 | // Set our current location. | |||
3621 | setLocation(Loc); | |||
3622 | ||||
3623 | // Emit a line table change for the current location inside the new scope. | |||
3624 | Builder.SetCurrentDebugLocation( | |||
3625 | llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc), | |||
3626 | LexicalBlockStack.back(), CurInlinedAt)); | |||
3627 | ||||
3628 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3629 | return; | |||
3630 | ||||
3631 | // Create a new lexical block and push it on the stack. | |||
3632 | CreateLexicalBlock(Loc); | |||
3633 | } | |||
3634 | ||||
3635 | void CGDebugInfo::EmitLexicalBlockEnd(CGBuilderTy &Builder, | |||
3636 | SourceLocation Loc) { | |||
3637 | assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")((!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!" ) ? static_cast<void> (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3637, __PRETTY_FUNCTION__)); | |||
3638 | ||||
3639 | // Provide an entry in the line table for the end of the block. | |||
3640 | EmitLocation(Builder, Loc); | |||
3641 | ||||
3642 | if (DebugKind <= codegenoptions::DebugLineTablesOnly) | |||
3643 | return; | |||
3644 | ||||
3645 | LexicalBlockStack.pop_back(); | |||
3646 | } | |||
3647 | ||||
3648 | void CGDebugInfo::EmitFunctionEnd(CGBuilderTy &Builder, llvm::Function *Fn) { | |||
3649 | assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")((!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!" ) ? static_cast<void> (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3649, __PRETTY_FUNCTION__)); | |||
3650 | unsigned RCount = FnBeginRegionCount.back(); | |||
3651 | assert(RCount <= LexicalBlockStack.size() && "Region stack mismatch")((RCount <= LexicalBlockStack.size() && "Region stack mismatch" ) ? static_cast<void> (0) : __assert_fail ("RCount <= LexicalBlockStack.size() && \"Region stack mismatch\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3651, __PRETTY_FUNCTION__)); | |||
3652 | ||||
3653 | // Pop all regions for this function. | |||
3654 | while (LexicalBlockStack.size() != RCount) { | |||
3655 | // Provide an entry in the line table for the end of the block. | |||
3656 | EmitLocation(Builder, CurLoc); | |||
3657 | LexicalBlockStack.pop_back(); | |||
3658 | } | |||
3659 | FnBeginRegionCount.pop_back(); | |||
3660 | ||||
3661 | if (Fn && Fn->getSubprogram()) | |||
3662 | DBuilder.finalizeSubprogram(Fn->getSubprogram()); | |||
3663 | } | |||
3664 | ||||
3665 | CGDebugInfo::BlockByRefType | |||
3666 | CGDebugInfo::EmitTypeForVarWithBlocksAttr(const VarDecl *VD, | |||
3667 | uint64_t *XOffset) { | |||
3668 | SmallVector<llvm::Metadata *, 5> EltTys; | |||
3669 | QualType FType; | |||
3670 | uint64_t FieldSize, FieldOffset; | |||
3671 | uint32_t FieldAlign; | |||
3672 | ||||
3673 | llvm::DIFile *Unit = getOrCreateFile(VD->getLocation()); | |||
3674 | QualType Type = VD->getType(); | |||
3675 | ||||
3676 | FieldOffset = 0; | |||
3677 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
3678 | EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset)); | |||
3679 | EltTys.push_back(CreateMemberType(Unit, FType, "__forwarding", &FieldOffset)); | |||
3680 | FType = CGM.getContext().IntTy; | |||
3681 | EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset)); | |||
3682 | EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset)); | |||
3683 | ||||
3684 | bool HasCopyAndDispose = CGM.getContext().BlockRequiresCopying(Type, VD); | |||
3685 | if (HasCopyAndDispose) { | |||
3686 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
3687 | EltTys.push_back( | |||
3688 | CreateMemberType(Unit, FType, "__copy_helper", &FieldOffset)); | |||
3689 | EltTys.push_back( | |||
3690 | CreateMemberType(Unit, FType, "__destroy_helper", &FieldOffset)); | |||
3691 | } | |||
3692 | bool HasByrefExtendedLayout; | |||
3693 | Qualifiers::ObjCLifetime Lifetime; | |||
3694 | if (CGM.getContext().getByrefLifetime(Type, Lifetime, | |||
3695 | HasByrefExtendedLayout) && | |||
3696 | HasByrefExtendedLayout) { | |||
3697 | FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy); | |||
3698 | EltTys.push_back( | |||
3699 | CreateMemberType(Unit, FType, "__byref_variable_layout", &FieldOffset)); | |||
3700 | } | |||
3701 | ||||
3702 | CharUnits Align = CGM.getContext().getDeclAlign(VD); | |||
3703 | if (Align > CGM.getContext().toCharUnitsFromBits( | |||
3704 | CGM.getTarget().getPointerAlign(0))) { | |||
3705 | CharUnits FieldOffsetInBytes = | |||
3706 | CGM.getContext().toCharUnitsFromBits(FieldOffset); | |||
3707 | CharUnits AlignedOffsetInBytes = FieldOffsetInBytes.alignTo(Align); | |||
3708 | CharUnits NumPaddingBytes = AlignedOffsetInBytes - FieldOffsetInBytes; | |||
3709 | ||||
3710 | if (NumPaddingBytes.isPositive()) { | |||
3711 | llvm::APInt pad(32, NumPaddingBytes.getQuantity()); | |||
3712 | FType = CGM.getContext().getConstantArrayType(CGM.getContext().CharTy, | |||
3713 | pad, ArrayType::Normal, 0); | |||
3714 | EltTys.push_back(CreateMemberType(Unit, FType, "", &FieldOffset)); | |||
3715 | } | |||
3716 | } | |||
3717 | ||||
3718 | FType = Type; | |||
3719 | llvm::DIType *WrappedTy = getOrCreateType(FType, Unit); | |||
3720 | FieldSize = CGM.getContext().getTypeSize(FType); | |||
3721 | FieldAlign = CGM.getContext().toBits(Align); | |||
3722 | ||||
3723 | *XOffset = FieldOffset; | |||
3724 | llvm::DIType *FieldTy = DBuilder.createMemberType( | |||
3725 | Unit, VD->getName(), Unit, 0, FieldSize, FieldAlign, FieldOffset, | |||
3726 | llvm::DINode::FlagZero, WrappedTy); | |||
3727 | EltTys.push_back(FieldTy); | |||
3728 | FieldOffset += FieldSize; | |||
3729 | ||||
3730 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
3731 | return {DBuilder.createStructType(Unit, "", Unit, 0, FieldOffset, 0, | |||
3732 | llvm::DINode::FlagZero, nullptr, Elements), | |||
3733 | WrappedTy}; | |||
3734 | } | |||
3735 | ||||
3736 | llvm::DILocalVariable *CGDebugInfo::EmitDeclare(const VarDecl *VD, | |||
3737 | llvm::Value *Storage, | |||
3738 | llvm::Optional<unsigned> ArgNo, | |||
3739 | CGBuilderTy &Builder) { | |||
3740 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3740, __PRETTY_FUNCTION__)); | |||
3741 | assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")((!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!" ) ? static_cast<void> (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3741, __PRETTY_FUNCTION__)); | |||
3742 | if (VD->hasAttr<NoDebugAttr>()) | |||
3743 | return nullptr; | |||
3744 | ||||
3745 | bool Unwritten = | |||
3746 | VD->isImplicit() || (isa<Decl>(VD->getDeclContext()) && | |||
3747 | cast<Decl>(VD->getDeclContext())->isImplicit()); | |||
3748 | llvm::DIFile *Unit = nullptr; | |||
3749 | if (!Unwritten) | |||
3750 | Unit = getOrCreateFile(VD->getLocation()); | |||
3751 | llvm::DIType *Ty; | |||
3752 | uint64_t XOffset = 0; | |||
3753 | if (VD->hasAttr<BlocksAttr>()) | |||
3754 | Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset).WrappedType; | |||
3755 | else | |||
3756 | Ty = getOrCreateType(VD->getType(), Unit); | |||
3757 | ||||
3758 | // If there is no debug info for this type then do not emit debug info | |||
3759 | // for this variable. | |||
3760 | if (!Ty) | |||
3761 | return nullptr; | |||
3762 | ||||
3763 | // Get location information. | |||
3764 | unsigned Line = 0; | |||
3765 | unsigned Column = 0; | |||
3766 | if (!Unwritten) { | |||
3767 | Line = getLineNumber(VD->getLocation()); | |||
3768 | Column = getColumnNumber(VD->getLocation()); | |||
3769 | } | |||
3770 | SmallVector<int64_t, 13> Expr; | |||
3771 | llvm::DINode::DIFlags Flags = llvm::DINode::FlagZero; | |||
3772 | if (VD->isImplicit()) | |||
3773 | Flags |= llvm::DINode::FlagArtificial; | |||
3774 | ||||
3775 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
3776 | ||||
3777 | unsigned AddressSpace = CGM.getContext().getTargetAddressSpace(VD->getType()); | |||
3778 | AppendAddressSpaceXDeref(AddressSpace, Expr); | |||
3779 | ||||
3780 | // If this is implicit parameter of CXXThis or ObjCSelf kind, then give it an | |||
3781 | // object pointer flag. | |||
3782 | if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD)) { | |||
3783 | if (IPD->getParameterKind() == ImplicitParamDecl::CXXThis || | |||
3784 | IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf) | |||
3785 | Flags |= llvm::DINode::FlagObjectPointer; | |||
3786 | } | |||
3787 | ||||
3788 | // Note: Older versions of clang used to emit byval references with an extra | |||
3789 | // DW_OP_deref, because they referenced the IR arg directly instead of | |||
3790 | // referencing an alloca. Newer versions of LLVM don't treat allocas | |||
3791 | // differently from other function arguments when used in a dbg.declare. | |||
3792 | auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back()); | |||
3793 | StringRef Name = VD->getName(); | |||
3794 | if (!Name.empty()) { | |||
3795 | if (VD->hasAttr<BlocksAttr>()) { | |||
3796 | // Here, we need an offset *into* the alloca. | |||
3797 | CharUnits offset = CharUnits::fromQuantity(32); | |||
3798 | Expr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3799 | // offset of __forwarding field | |||
3800 | offset = CGM.getContext().toCharUnitsFromBits( | |||
3801 | CGM.getTarget().getPointerWidth(0)); | |||
3802 | Expr.push_back(offset.getQuantity()); | |||
3803 | Expr.push_back(llvm::dwarf::DW_OP_deref); | |||
3804 | Expr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3805 | // offset of x field | |||
3806 | offset = CGM.getContext().toCharUnitsFromBits(XOffset); | |||
3807 | Expr.push_back(offset.getQuantity()); | |||
3808 | } | |||
3809 | } else if (const auto *RT = dyn_cast<RecordType>(VD->getType())) { | |||
3810 | // If VD is an anonymous union then Storage represents value for | |||
3811 | // all union fields. | |||
3812 | const RecordDecl *RD = RT->getDecl(); | |||
3813 | if (RD->isUnion() && RD->isAnonymousStructOrUnion()) { | |||
3814 | // GDB has trouble finding local variables in anonymous unions, so we emit | |||
3815 | // artificial local variables for each of the members. | |||
3816 | // | |||
3817 | // FIXME: Remove this code as soon as GDB supports this. | |||
3818 | // The debug info verifier in LLVM operates based on the assumption that a | |||
3819 | // variable has the same size as its storage and we had to disable the | |||
3820 | // check for artificial variables. | |||
3821 | for (const auto *Field : RD->fields()) { | |||
3822 | llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit); | |||
3823 | StringRef FieldName = Field->getName(); | |||
3824 | ||||
3825 | // Ignore unnamed fields. Do not ignore unnamed records. | |||
3826 | if (FieldName.empty() && !isa<RecordType>(Field->getType())) | |||
3827 | continue; | |||
3828 | ||||
3829 | // Use VarDecl's Tag, Scope and Line number. | |||
3830 | auto FieldAlign = getDeclAlignIfRequired(Field, CGM.getContext()); | |||
3831 | auto *D = DBuilder.createAutoVariable( | |||
3832 | Scope, FieldName, Unit, Line, FieldTy, CGM.getLangOpts().Optimize, | |||
3833 | Flags | llvm::DINode::FlagArtificial, FieldAlign); | |||
3834 | ||||
3835 | // Insert an llvm.dbg.declare into the current block. | |||
3836 | DBuilder.insertDeclare( | |||
3837 | Storage, D, DBuilder.createExpression(Expr), | |||
3838 | llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt), | |||
3839 | Builder.GetInsertBlock()); | |||
3840 | } | |||
3841 | } | |||
3842 | } | |||
3843 | ||||
3844 | // Create the descriptor for the variable. | |||
3845 | auto *D = ArgNo ? DBuilder.createParameterVariable( | |||
3846 | Scope, Name, *ArgNo, Unit, Line, Ty, | |||
3847 | CGM.getLangOpts().Optimize, Flags) | |||
3848 | : DBuilder.createAutoVariable(Scope, Name, Unit, Line, Ty, | |||
3849 | CGM.getLangOpts().Optimize, | |||
3850 | Flags, Align); | |||
3851 | ||||
3852 | // Insert an llvm.dbg.declare into the current block. | |||
3853 | DBuilder.insertDeclare(Storage, D, DBuilder.createExpression(Expr), | |||
3854 | llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt), | |||
3855 | Builder.GetInsertBlock()); | |||
3856 | ||||
3857 | return D; | |||
3858 | } | |||
3859 | ||||
3860 | llvm::DILocalVariable * | |||
3861 | CGDebugInfo::EmitDeclareOfAutoVariable(const VarDecl *VD, llvm::Value *Storage, | |||
3862 | CGBuilderTy &Builder) { | |||
3863 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3863, __PRETTY_FUNCTION__)); | |||
3864 | return EmitDeclare(VD, Storage, llvm::None, Builder); | |||
3865 | } | |||
3866 | ||||
3867 | llvm::DIType *CGDebugInfo::CreateSelfType(const QualType &QualTy, | |||
3868 | llvm::DIType *Ty) { | |||
3869 | llvm::DIType *CachedTy = getTypeOrNull(QualTy); | |||
3870 | if (CachedTy) | |||
3871 | Ty = CachedTy; | |||
3872 | return DBuilder.createObjectPointerType(Ty); | |||
3873 | } | |||
3874 | ||||
3875 | void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable( | |||
3876 | const VarDecl *VD, llvm::Value *Storage, CGBuilderTy &Builder, | |||
3877 | const CGBlockInfo &blockInfo, llvm::Instruction *InsertPoint) { | |||
3878 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3878, __PRETTY_FUNCTION__)); | |||
3879 | assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!")((!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!" ) ? static_cast<void> (0) : __assert_fail ("!LexicalBlockStack.empty() && \"Region stack mismatch, stack empty!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3879, __PRETTY_FUNCTION__)); | |||
3880 | ||||
3881 | if (Builder.GetInsertBlock() == nullptr) | |||
3882 | return; | |||
3883 | if (VD->hasAttr<NoDebugAttr>()) | |||
3884 | return; | |||
3885 | ||||
3886 | bool isByRef = VD->hasAttr<BlocksAttr>(); | |||
3887 | ||||
3888 | uint64_t XOffset = 0; | |||
3889 | llvm::DIFile *Unit = getOrCreateFile(VD->getLocation()); | |||
3890 | llvm::DIType *Ty; | |||
3891 | if (isByRef) | |||
3892 | Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset).WrappedType; | |||
3893 | else | |||
3894 | Ty = getOrCreateType(VD->getType(), Unit); | |||
3895 | ||||
3896 | // Self is passed along as an implicit non-arg variable in a | |||
3897 | // block. Mark it as the object pointer. | |||
3898 | if (const auto *IPD = dyn_cast<ImplicitParamDecl>(VD)) | |||
3899 | if (IPD->getParameterKind() == ImplicitParamDecl::ObjCSelf) | |||
3900 | Ty = CreateSelfType(VD->getType(), Ty); | |||
3901 | ||||
3902 | // Get location information. | |||
3903 | unsigned Line = getLineNumber(VD->getLocation()); | |||
3904 | unsigned Column = getColumnNumber(VD->getLocation()); | |||
3905 | ||||
3906 | const llvm::DataLayout &target = CGM.getDataLayout(); | |||
3907 | ||||
3908 | CharUnits offset = CharUnits::fromQuantity( | |||
3909 | target.getStructLayout(blockInfo.StructureType) | |||
3910 | ->getElementOffset(blockInfo.getCapture(VD).getIndex())); | |||
3911 | ||||
3912 | SmallVector<int64_t, 9> addr; | |||
3913 | addr.push_back(llvm::dwarf::DW_OP_deref); | |||
3914 | addr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3915 | addr.push_back(offset.getQuantity()); | |||
3916 | if (isByRef) { | |||
3917 | addr.push_back(llvm::dwarf::DW_OP_deref); | |||
3918 | addr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3919 | // offset of __forwarding field | |||
3920 | offset = | |||
3921 | CGM.getContext().toCharUnitsFromBits(target.getPointerSizeInBits(0)); | |||
3922 | addr.push_back(offset.getQuantity()); | |||
3923 | addr.push_back(llvm::dwarf::DW_OP_deref); | |||
3924 | addr.push_back(llvm::dwarf::DW_OP_plus_uconst); | |||
3925 | // offset of x field | |||
3926 | offset = CGM.getContext().toCharUnitsFromBits(XOffset); | |||
3927 | addr.push_back(offset.getQuantity()); | |||
3928 | } | |||
3929 | ||||
3930 | // Create the descriptor for the variable. | |||
3931 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
3932 | auto *D = DBuilder.createAutoVariable( | |||
3933 | cast<llvm::DILocalScope>(LexicalBlockStack.back()), VD->getName(), Unit, | |||
3934 | Line, Ty, false, llvm::DINode::FlagZero, Align); | |||
3935 | ||||
3936 | // Insert an llvm.dbg.declare into the current block. | |||
3937 | auto DL = | |||
3938 | llvm::DebugLoc::get(Line, Column, LexicalBlockStack.back(), CurInlinedAt); | |||
3939 | auto *Expr = DBuilder.createExpression(addr); | |||
3940 | if (InsertPoint) | |||
3941 | DBuilder.insertDeclare(Storage, D, Expr, DL, InsertPoint); | |||
3942 | else | |||
3943 | DBuilder.insertDeclare(Storage, D, Expr, DL, Builder.GetInsertBlock()); | |||
3944 | } | |||
3945 | ||||
3946 | void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *VD, llvm::Value *AI, | |||
3947 | unsigned ArgNo, | |||
3948 | CGBuilderTy &Builder) { | |||
3949 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 3949, __PRETTY_FUNCTION__)); | |||
3950 | EmitDeclare(VD, AI, ArgNo, Builder); | |||
3951 | } | |||
3952 | ||||
3953 | namespace { | |||
3954 | struct BlockLayoutChunk { | |||
3955 | uint64_t OffsetInBits; | |||
3956 | const BlockDecl::Capture *Capture; | |||
3957 | }; | |||
3958 | bool operator<(const BlockLayoutChunk &l, const BlockLayoutChunk &r) { | |||
3959 | return l.OffsetInBits < r.OffsetInBits; | |||
3960 | } | |||
3961 | } // namespace | |||
3962 | ||||
3963 | void CGDebugInfo::collectDefaultFieldsForBlockLiteralDeclare( | |||
3964 | const CGBlockInfo &Block, const ASTContext &Context, SourceLocation Loc, | |||
3965 | const llvm::StructLayout &BlockLayout, llvm::DIFile *Unit, | |||
3966 | SmallVectorImpl<llvm::Metadata *> &Fields) { | |||
3967 | // Blocks in OpenCL have unique constraints which make the standard fields | |||
3968 | // redundant while requiring size and align fields for enqueue_kernel. See | |||
3969 | // initializeForBlockHeader in CGBlocks.cpp | |||
3970 | if (CGM.getLangOpts().OpenCL) { | |||
3971 | Fields.push_back(createFieldType("__size", Context.IntTy, Loc, AS_public, | |||
3972 | BlockLayout.getElementOffsetInBits(0), | |||
3973 | Unit, Unit)); | |||
3974 | Fields.push_back(createFieldType("__align", Context.IntTy, Loc, AS_public, | |||
3975 | BlockLayout.getElementOffsetInBits(1), | |||
3976 | Unit, Unit)); | |||
3977 | } else { | |||
3978 | Fields.push_back(createFieldType("__isa", Context.VoidPtrTy, Loc, AS_public, | |||
3979 | BlockLayout.getElementOffsetInBits(0), | |||
3980 | Unit, Unit)); | |||
3981 | Fields.push_back(createFieldType("__flags", Context.IntTy, Loc, AS_public, | |||
3982 | BlockLayout.getElementOffsetInBits(1), | |||
3983 | Unit, Unit)); | |||
3984 | Fields.push_back( | |||
3985 | createFieldType("__reserved", Context.IntTy, Loc, AS_public, | |||
3986 | BlockLayout.getElementOffsetInBits(2), Unit, Unit)); | |||
3987 | auto *FnTy = Block.getBlockExpr()->getFunctionType(); | |||
3988 | auto FnPtrType = CGM.getContext().getPointerType(FnTy->desugar()); | |||
3989 | Fields.push_back(createFieldType("__FuncPtr", FnPtrType, Loc, AS_public, | |||
3990 | BlockLayout.getElementOffsetInBits(3), | |||
3991 | Unit, Unit)); | |||
3992 | Fields.push_back(createFieldType( | |||
3993 | "__descriptor", | |||
3994 | Context.getPointerType(Block.NeedsCopyDispose | |||
3995 | ? Context.getBlockDescriptorExtendedType() | |||
3996 | : Context.getBlockDescriptorType()), | |||
3997 | Loc, AS_public, BlockLayout.getElementOffsetInBits(4), Unit, Unit)); | |||
3998 | } | |||
3999 | } | |||
4000 | ||||
4001 | void CGDebugInfo::EmitDeclareOfBlockLiteralArgVariable(const CGBlockInfo &block, | |||
4002 | StringRef Name, | |||
4003 | unsigned ArgNo, | |||
4004 | llvm::AllocaInst *Alloca, | |||
4005 | CGBuilderTy &Builder) { | |||
4006 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4006, __PRETTY_FUNCTION__)); | |||
4007 | ASTContext &C = CGM.getContext(); | |||
4008 | const BlockDecl *blockDecl = block.getBlockDecl(); | |||
4009 | ||||
4010 | // Collect some general information about the block's location. | |||
4011 | SourceLocation loc = blockDecl->getCaretLocation(); | |||
4012 | llvm::DIFile *tunit = getOrCreateFile(loc); | |||
4013 | unsigned line = getLineNumber(loc); | |||
4014 | unsigned column = getColumnNumber(loc); | |||
4015 | ||||
4016 | // Build the debug-info type for the block literal. | |||
4017 | getDeclContextDescriptor(blockDecl); | |||
4018 | ||||
4019 | const llvm::StructLayout *blockLayout = | |||
4020 | CGM.getDataLayout().getStructLayout(block.StructureType); | |||
4021 | ||||
4022 | SmallVector<llvm::Metadata *, 16> fields; | |||
4023 | collectDefaultFieldsForBlockLiteralDeclare(block, C, loc, *blockLayout, tunit, | |||
4024 | fields); | |||
4025 | ||||
4026 | // We want to sort the captures by offset, not because DWARF | |||
4027 | // requires this, but because we're paranoid about debuggers. | |||
4028 | SmallVector<BlockLayoutChunk, 8> chunks; | |||
4029 | ||||
4030 | // 'this' capture. | |||
4031 | if (blockDecl->capturesCXXThis()) { | |||
4032 | BlockLayoutChunk chunk; | |||
4033 | chunk.OffsetInBits = | |||
4034 | blockLayout->getElementOffsetInBits(block.CXXThisIndex); | |||
4035 | chunk.Capture = nullptr; | |||
4036 | chunks.push_back(chunk); | |||
4037 | } | |||
4038 | ||||
4039 | // Variable captures. | |||
4040 | for (const auto &capture : blockDecl->captures()) { | |||
4041 | const VarDecl *variable = capture.getVariable(); | |||
4042 | const CGBlockInfo::Capture &captureInfo = block.getCapture(variable); | |||
4043 | ||||
4044 | // Ignore constant captures. | |||
4045 | if (captureInfo.isConstant()) | |||
4046 | continue; | |||
4047 | ||||
4048 | BlockLayoutChunk chunk; | |||
4049 | chunk.OffsetInBits = | |||
4050 | blockLayout->getElementOffsetInBits(captureInfo.getIndex()); | |||
4051 | chunk.Capture = &capture; | |||
4052 | chunks.push_back(chunk); | |||
4053 | } | |||
4054 | ||||
4055 | // Sort by offset. | |||
4056 | llvm::array_pod_sort(chunks.begin(), chunks.end()); | |||
4057 | ||||
4058 | for (const BlockLayoutChunk &Chunk : chunks) { | |||
4059 | uint64_t offsetInBits = Chunk.OffsetInBits; | |||
4060 | const BlockDecl::Capture *capture = Chunk.Capture; | |||
4061 | ||||
4062 | // If we have a null capture, this must be the C++ 'this' capture. | |||
4063 | if (!capture) { | |||
4064 | QualType type; | |||
4065 | if (auto *Method = | |||
4066 | cast_or_null<CXXMethodDecl>(blockDecl->getNonClosureContext())) | |||
4067 | type = Method->getThisType(C); | |||
4068 | else if (auto *RDecl = dyn_cast<CXXRecordDecl>(blockDecl->getParent())) | |||
4069 | type = QualType(RDecl->getTypeForDecl(), 0); | |||
4070 | else | |||
4071 | llvm_unreachable("unexpected block declcontext")::llvm::llvm_unreachable_internal("unexpected block declcontext" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4071); | |||
4072 | ||||
4073 | fields.push_back(createFieldType("this", type, loc, AS_public, | |||
4074 | offsetInBits, tunit, tunit)); | |||
4075 | continue; | |||
4076 | } | |||
4077 | ||||
4078 | const VarDecl *variable = capture->getVariable(); | |||
4079 | StringRef name = variable->getName(); | |||
4080 | ||||
4081 | llvm::DIType *fieldType; | |||
4082 | if (capture->isByRef()) { | |||
4083 | TypeInfo PtrInfo = C.getTypeInfo(C.VoidPtrTy); | |||
4084 | auto Align = PtrInfo.AlignIsRequired ? PtrInfo.Align : 0; | |||
4085 | // FIXME: This recomputes the layout of the BlockByRefWrapper. | |||
4086 | uint64_t xoffset; | |||
4087 | fieldType = | |||
4088 | EmitTypeForVarWithBlocksAttr(variable, &xoffset).BlockByRefWrapper; | |||
4089 | fieldType = DBuilder.createPointerType(fieldType, PtrInfo.Width); | |||
4090 | fieldType = DBuilder.createMemberType(tunit, name, tunit, line, | |||
4091 | PtrInfo.Width, Align, offsetInBits, | |||
4092 | llvm::DINode::FlagZero, fieldType); | |||
4093 | } else { | |||
4094 | auto Align = getDeclAlignIfRequired(variable, CGM.getContext()); | |||
4095 | fieldType = createFieldType(name, variable->getType(), loc, AS_public, | |||
4096 | offsetInBits, Align, tunit, tunit); | |||
4097 | } | |||
4098 | fields.push_back(fieldType); | |||
4099 | } | |||
4100 | ||||
4101 | SmallString<36> typeName; | |||
4102 | llvm::raw_svector_ostream(typeName) | |||
4103 | << "__block_literal_" << CGM.getUniqueBlockCount(); | |||
4104 | ||||
4105 | llvm::DINodeArray fieldsArray = DBuilder.getOrCreateArray(fields); | |||
4106 | ||||
4107 | llvm::DIType *type = | |||
4108 | DBuilder.createStructType(tunit, typeName.str(), tunit, line, | |||
4109 | CGM.getContext().toBits(block.BlockSize), 0, | |||
4110 | llvm::DINode::FlagZero, nullptr, fieldsArray); | |||
4111 | type = DBuilder.createPointerType(type, CGM.PointerWidthInBits); | |||
4112 | ||||
4113 | // Get overall information about the block. | |||
4114 | llvm::DINode::DIFlags flags = llvm::DINode::FlagArtificial; | |||
4115 | auto *scope = cast<llvm::DILocalScope>(LexicalBlockStack.back()); | |||
4116 | ||||
4117 | // Create the descriptor for the parameter. | |||
4118 | auto *debugVar = DBuilder.createParameterVariable( | |||
4119 | scope, Name, ArgNo, tunit, line, type, CGM.getLangOpts().Optimize, flags); | |||
4120 | ||||
4121 | // Insert an llvm.dbg.declare into the current block. | |||
4122 | DBuilder.insertDeclare(Alloca, debugVar, DBuilder.createExpression(), | |||
4123 | llvm::DebugLoc::get(line, column, scope, CurInlinedAt), | |||
4124 | Builder.GetInsertBlock()); | |||
4125 | } | |||
4126 | ||||
4127 | llvm::DIDerivedType * | |||
4128 | CGDebugInfo::getOrCreateStaticDataMemberDeclarationOrNull(const VarDecl *D) { | |||
4129 | if (!D->isStaticDataMember()) | |||
4130 | return nullptr; | |||
4131 | ||||
4132 | auto MI = StaticDataMemberCache.find(D->getCanonicalDecl()); | |||
4133 | if (MI != StaticDataMemberCache.end()) { | |||
4134 | assert(MI->second && "Static data member declaration should still exist")((MI->second && "Static data member declaration should still exist" ) ? static_cast<void> (0) : __assert_fail ("MI->second && \"Static data member declaration should still exist\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4134, __PRETTY_FUNCTION__)); | |||
4135 | return MI->second; | |||
4136 | } | |||
4137 | ||||
4138 | // If the member wasn't found in the cache, lazily construct and add it to the | |||
4139 | // type (used when a limited form of the type is emitted). | |||
4140 | auto DC = D->getDeclContext(); | |||
4141 | auto *Ctxt = cast<llvm::DICompositeType>(getDeclContextDescriptor(D)); | |||
4142 | return CreateRecordStaticField(D, Ctxt, cast<RecordDecl>(DC)); | |||
4143 | } | |||
4144 | ||||
4145 | llvm::DIGlobalVariableExpression *CGDebugInfo::CollectAnonRecordDecls( | |||
4146 | const RecordDecl *RD, llvm::DIFile *Unit, unsigned LineNo, | |||
4147 | StringRef LinkageName, llvm::GlobalVariable *Var, llvm::DIScope *DContext) { | |||
4148 | llvm::DIGlobalVariableExpression *GVE = nullptr; | |||
4149 | ||||
4150 | for (const auto *Field : RD->fields()) { | |||
4151 | llvm::DIType *FieldTy = getOrCreateType(Field->getType(), Unit); | |||
4152 | StringRef FieldName = Field->getName(); | |||
4153 | ||||
4154 | // Ignore unnamed fields, but recurse into anonymous records. | |||
4155 | if (FieldName.empty()) { | |||
4156 | if (const auto *RT = dyn_cast<RecordType>(Field->getType())) | |||
4157 | GVE = CollectAnonRecordDecls(RT->getDecl(), Unit, LineNo, LinkageName, | |||
4158 | Var, DContext); | |||
4159 | continue; | |||
4160 | } | |||
4161 | // Use VarDecl's Tag, Scope and Line number. | |||
4162 | GVE = DBuilder.createGlobalVariableExpression( | |||
4163 | DContext, FieldName, LinkageName, Unit, LineNo, FieldTy, | |||
4164 | Var->hasLocalLinkage()); | |||
4165 | Var->addDebugInfo(GVE); | |||
4166 | } | |||
4167 | return GVE; | |||
4168 | } | |||
4169 | ||||
4170 | void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var, | |||
4171 | const VarDecl *D) { | |||
4172 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4172, __PRETTY_FUNCTION__)); | |||
| ||||
4173 | if (D->hasAttr<NoDebugAttr>()) | |||
4174 | return; | |||
4175 | ||||
4176 | // If we already created a DIGlobalVariable for this declaration, just attach | |||
4177 | // it to the llvm::GlobalVariable. | |||
4178 | auto Cached = DeclCache.find(D->getCanonicalDecl()); | |||
4179 | if (Cached != DeclCache.end()) | |||
4180 | return Var->addDebugInfo( | |||
4181 | cast<llvm::DIGlobalVariableExpression>(Cached->second)); | |||
4182 | ||||
4183 | // Create global variable debug descriptor. | |||
4184 | llvm::DIFile *Unit = nullptr; | |||
4185 | llvm::DIScope *DContext = nullptr; | |||
4186 | unsigned LineNo; | |||
4187 | StringRef DeclName, LinkageName; | |||
4188 | QualType T; | |||
4189 | llvm::MDTuple *TemplateParameters = nullptr; | |||
4190 | collectVarDeclProps(D, Unit, LineNo, T, DeclName, LinkageName, | |||
4191 | TemplateParameters, DContext); | |||
4192 | ||||
4193 | // Attempt to store one global variable for the declaration - even if we | |||
4194 | // emit a lot of fields. | |||
4195 | llvm::DIGlobalVariableExpression *GVE = nullptr; | |||
4196 | ||||
4197 | // If this is an anonymous union then we'll want to emit a global | |||
4198 | // variable for each member of the anonymous union so that it's possible | |||
4199 | // to find the name of any field in the union. | |||
4200 | if (T->isUnionType() && DeclName.empty()) { | |||
4201 | const RecordDecl *RD = T->castAs<RecordType>()->getDecl(); | |||
4202 | assert(RD->isAnonymousStructOrUnion() &&((RD->isAnonymousStructOrUnion() && "unnamed non-anonymous struct or union?" ) ? static_cast<void> (0) : __assert_fail ("RD->isAnonymousStructOrUnion() && \"unnamed non-anonymous struct or union?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4203, __PRETTY_FUNCTION__)) | |||
4203 | "unnamed non-anonymous struct or union?")((RD->isAnonymousStructOrUnion() && "unnamed non-anonymous struct or union?" ) ? static_cast<void> (0) : __assert_fail ("RD->isAnonymousStructOrUnion() && \"unnamed non-anonymous struct or union?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4203, __PRETTY_FUNCTION__)); | |||
4204 | GVE = CollectAnonRecordDecls(RD, Unit, LineNo, LinkageName, Var, DContext); | |||
4205 | } else { | |||
4206 | auto Align = getDeclAlignIfRequired(D, CGM.getContext()); | |||
4207 | ||||
4208 | SmallVector<int64_t, 4> Expr; | |||
4209 | unsigned AddressSpace = | |||
4210 | CGM.getContext().getTargetAddressSpace(D->getType()); | |||
4211 | AppendAddressSpaceXDeref(AddressSpace, Expr); | |||
4212 | ||||
4213 | GVE = DBuilder.createGlobalVariableExpression( | |||
4214 | DContext, DeclName, LinkageName, Unit, LineNo, getOrCreateType(T, Unit), | |||
4215 | Var->hasLocalLinkage(), | |||
4216 | Expr.empty() ? nullptr : DBuilder.createExpression(Expr), | |||
4217 | getOrCreateStaticDataMemberDeclarationOrNull(D), TemplateParameters, | |||
4218 | Align); | |||
4219 | Var->addDebugInfo(GVE); | |||
4220 | } | |||
4221 | DeclCache[D->getCanonicalDecl()].reset(GVE); | |||
4222 | } | |||
4223 | ||||
4224 | void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) { | |||
4225 | assert(DebugKind >= codegenoptions::LimitedDebugInfo)((DebugKind >= codegenoptions::LimitedDebugInfo) ? static_cast <void> (0) : __assert_fail ("DebugKind >= codegenoptions::LimitedDebugInfo" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4225, __PRETTY_FUNCTION__)); | |||
4226 | if (VD->hasAttr<NoDebugAttr>()) | |||
4227 | return; | |||
4228 | auto Align = getDeclAlignIfRequired(VD, CGM.getContext()); | |||
4229 | // Create the descriptor for the variable. | |||
4230 | llvm::DIFile *Unit = getOrCreateFile(VD->getLocation()); | |||
4231 | StringRef Name = VD->getName(); | |||
4232 | llvm::DIType *Ty = getOrCreateType(VD->getType(), Unit); | |||
4233 | if (const auto *ECD = dyn_cast<EnumConstantDecl>(VD)) { | |||
4234 | const auto *ED = cast<EnumDecl>(ECD->getDeclContext()); | |||
4235 | assert(isa<EnumType>(ED->getTypeForDecl()) && "Enum without EnumType?")((isa<EnumType>(ED->getTypeForDecl()) && "Enum without EnumType?" ) ? static_cast<void> (0) : __assert_fail ("isa<EnumType>(ED->getTypeForDecl()) && \"Enum without EnumType?\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4235, __PRETTY_FUNCTION__)); | |||
4236 | Ty = getOrCreateType(QualType(ED->getTypeForDecl(), 0), Unit); | |||
4237 | } | |||
4238 | // Do not use global variables for enums. | |||
4239 | // | |||
4240 | // FIXME: why not? | |||
4241 | if (Ty->getTag() == llvm::dwarf::DW_TAG_enumeration_type) | |||
4242 | return; | |||
4243 | // Do not emit separate definitions for function local const/statics. | |||
4244 | if (isa<FunctionDecl>(VD->getDeclContext())) | |||
4245 | return; | |||
4246 | VD = cast<ValueDecl>(VD->getCanonicalDecl()); | |||
4247 | auto *VarD = cast<VarDecl>(VD); | |||
4248 | if (VarD->isStaticDataMember()) { | |||
4249 | auto *RD = cast<RecordDecl>(VarD->getDeclContext()); | |||
4250 | getDeclContextDescriptor(VarD); | |||
4251 | // Ensure that the type is retained even though it's otherwise unreferenced. | |||
4252 | // | |||
4253 | // FIXME: This is probably unnecessary, since Ty should reference RD | |||
4254 | // through its scope. | |||
4255 | RetainedTypes.push_back( | |||
4256 | CGM.getContext().getRecordType(RD).getAsOpaquePtr()); | |||
4257 | return; | |||
4258 | } | |||
4259 | ||||
4260 | llvm::DIScope *DContext = getDeclContextDescriptor(VD); | |||
4261 | ||||
4262 | auto &GV = DeclCache[VD]; | |||
4263 | if (GV) | |||
4264 | return; | |||
4265 | llvm::DIExpression *InitExpr = nullptr; | |||
4266 | if (CGM.getContext().getTypeSize(VD->getType()) <= 64) { | |||
4267 | // FIXME: Add a representation for integer constants wider than 64 bits. | |||
4268 | if (Init.isInt()) | |||
4269 | InitExpr = | |||
4270 | DBuilder.createConstantValueExpression(Init.getInt().getExtValue()); | |||
4271 | else if (Init.isFloat()) | |||
4272 | InitExpr = DBuilder.createConstantValueExpression( | |||
4273 | Init.getFloat().bitcastToAPInt().getZExtValue()); | |||
4274 | } | |||
4275 | ||||
4276 | llvm::MDTuple *TemplateParameters = nullptr; | |||
4277 | ||||
4278 | if (isa<VarTemplateSpecializationDecl>(VD)) | |||
4279 | if (VarD) { | |||
4280 | llvm::DINodeArray parameterNodes = CollectVarTemplateParams(VarD, &*Unit); | |||
4281 | TemplateParameters = parameterNodes.get(); | |||
4282 | } | |||
4283 | ||||
4284 | GV.reset(DBuilder.createGlobalVariableExpression( | |||
4285 | DContext, Name, StringRef(), Unit, getLineNumber(VD->getLocation()), Ty, | |||
4286 | true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VarD), | |||
4287 | TemplateParameters, Align)); | |||
4288 | } | |||
4289 | ||||
4290 | llvm::DIScope *CGDebugInfo::getCurrentContextDescriptor(const Decl *D) { | |||
4291 | if (!LexicalBlockStack.empty()) | |||
4292 | return LexicalBlockStack.back(); | |||
4293 | llvm::DIScope *Mod = getParentModuleOrNull(D); | |||
4294 | return getContextDescriptor(D, Mod ? Mod : TheCU); | |||
4295 | } | |||
4296 | ||||
4297 | void CGDebugInfo::EmitUsingDirective(const UsingDirectiveDecl &UD) { | |||
4298 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
4299 | return; | |||
4300 | const NamespaceDecl *NSDecl = UD.getNominatedNamespace(); | |||
4301 | if (!NSDecl->isAnonymousNamespace() || | |||
4302 | CGM.getCodeGenOpts().DebugExplicitImport) { | |||
4303 | auto Loc = UD.getLocation(); | |||
4304 | DBuilder.createImportedModule( | |||
4305 | getCurrentContextDescriptor(cast<Decl>(UD.getDeclContext())), | |||
4306 | getOrCreateNamespace(NSDecl), getOrCreateFile(Loc), getLineNumber(Loc)); | |||
4307 | } | |||
4308 | } | |||
4309 | ||||
4310 | void CGDebugInfo::EmitUsingDecl(const UsingDecl &UD) { | |||
4311 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
4312 | return; | |||
4313 | assert(UD.shadow_size() &&((UD.shadow_size() && "We shouldn't be codegening an invalid UsingDecl containing no decls" ) ? static_cast<void> (0) : __assert_fail ("UD.shadow_size() && \"We shouldn't be codegening an invalid UsingDecl containing no decls\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4314, __PRETTY_FUNCTION__)) | |||
4314 | "We shouldn't be codegening an invalid UsingDecl containing no decls")((UD.shadow_size() && "We shouldn't be codegening an invalid UsingDecl containing no decls" ) ? static_cast<void> (0) : __assert_fail ("UD.shadow_size() && \"We shouldn't be codegening an invalid UsingDecl containing no decls\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4314, __PRETTY_FUNCTION__)); | |||
4315 | // Emitting one decl is sufficient - debuggers can detect that this is an | |||
4316 | // overloaded name & provide lookup for all the overloads. | |||
4317 | const UsingShadowDecl &USD = **UD.shadow_begin(); | |||
4318 | ||||
4319 | // FIXME: Skip functions with undeduced auto return type for now since we | |||
4320 | // don't currently have the plumbing for separate declarations & definitions | |||
4321 | // of free functions and mismatched types (auto in the declaration, concrete | |||
4322 | // return type in the definition) | |||
4323 | if (const auto *FD = dyn_cast<FunctionDecl>(USD.getUnderlyingDecl())) | |||
4324 | if (const auto *AT = | |||
4325 | FD->getType()->getAs<FunctionProtoType>()->getContainedAutoType()) | |||
4326 | if (AT->getDeducedType().isNull()) | |||
4327 | return; | |||
4328 | if (llvm::DINode *Target = | |||
4329 | getDeclarationOrDefinition(USD.getUnderlyingDecl())) { | |||
4330 | auto Loc = USD.getLocation(); | |||
4331 | DBuilder.createImportedDeclaration( | |||
4332 | getCurrentContextDescriptor(cast<Decl>(USD.getDeclContext())), Target, | |||
4333 | getOrCreateFile(Loc), getLineNumber(Loc)); | |||
4334 | } | |||
4335 | } | |||
4336 | ||||
4337 | void CGDebugInfo::EmitImportDecl(const ImportDecl &ID) { | |||
4338 | if (CGM.getCodeGenOpts().getDebuggerTuning() != llvm::DebuggerKind::LLDB) | |||
4339 | return; | |||
4340 | if (Module *M = ID.getImportedModule()) { | |||
4341 | auto Info = ExternalASTSource::ASTSourceDescriptor(*M); | |||
4342 | auto Loc = ID.getLocation(); | |||
4343 | DBuilder.createImportedDeclaration( | |||
4344 | getCurrentContextDescriptor(cast<Decl>(ID.getDeclContext())), | |||
4345 | getOrCreateModuleRef(Info, DebugTypeExtRefs), getOrCreateFile(Loc), | |||
4346 | getLineNumber(Loc)); | |||
4347 | } | |||
4348 | } | |||
4349 | ||||
4350 | llvm::DIImportedEntity * | |||
4351 | CGDebugInfo::EmitNamespaceAlias(const NamespaceAliasDecl &NA) { | |||
4352 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
4353 | return nullptr; | |||
4354 | auto &VH = NamespaceAliasCache[&NA]; | |||
4355 | if (VH) | |||
4356 | return cast<llvm::DIImportedEntity>(VH); | |||
4357 | llvm::DIImportedEntity *R; | |||
4358 | auto Loc = NA.getLocation(); | |||
4359 | if (const auto *Underlying = | |||
4360 | dyn_cast<NamespaceAliasDecl>(NA.getAliasedNamespace())) | |||
4361 | // This could cache & dedup here rather than relying on metadata deduping. | |||
4362 | R = DBuilder.createImportedDeclaration( | |||
4363 | getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())), | |||
4364 | EmitNamespaceAlias(*Underlying), getOrCreateFile(Loc), | |||
4365 | getLineNumber(Loc), NA.getName()); | |||
4366 | else | |||
4367 | R = DBuilder.createImportedDeclaration( | |||
4368 | getCurrentContextDescriptor(cast<Decl>(NA.getDeclContext())), | |||
4369 | getOrCreateNamespace(cast<NamespaceDecl>(NA.getAliasedNamespace())), | |||
4370 | getOrCreateFile(Loc), getLineNumber(Loc), NA.getName()); | |||
4371 | VH.reset(R); | |||
4372 | return R; | |||
4373 | } | |||
4374 | ||||
4375 | llvm::DINamespace * | |||
4376 | CGDebugInfo::getOrCreateNamespace(const NamespaceDecl *NSDecl) { | |||
4377 | // Don't canonicalize the NamespaceDecl here: The DINamespace will be uniqued | |||
4378 | // if necessary, and this way multiple declarations of the same namespace in | |||
4379 | // different parent modules stay distinct. | |||
4380 | auto I = NamespaceCache.find(NSDecl); | |||
4381 | if (I != NamespaceCache.end()) | |||
4382 | return cast<llvm::DINamespace>(I->second); | |||
4383 | ||||
4384 | llvm::DIScope *Context = getDeclContextDescriptor(NSDecl); | |||
4385 | // Don't trust the context if it is a DIModule (see comment above). | |||
4386 | llvm::DINamespace *NS = | |||
4387 | DBuilder.createNameSpace(Context, NSDecl->getName(), NSDecl->isInline()); | |||
4388 | NamespaceCache[NSDecl].reset(NS); | |||
4389 | return NS; | |||
4390 | } | |||
4391 | ||||
4392 | void CGDebugInfo::setDwoId(uint64_t Signature) { | |||
4393 | assert(TheCU && "no main compile unit")((TheCU && "no main compile unit") ? static_cast<void > (0) : __assert_fail ("TheCU && \"no main compile unit\"" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4393, __PRETTY_FUNCTION__)); | |||
4394 | TheCU->setDWOId(Signature); | |||
4395 | } | |||
4396 | ||||
4397 | void CGDebugInfo::finalize() { | |||
4398 | // Creating types might create further types - invalidating the current | |||
4399 | // element and the size(), so don't cache/reference them. | |||
4400 | for (size_t i = 0; i != ObjCInterfaceCache.size(); ++i) { | |||
4401 | ObjCInterfaceCacheEntry E = ObjCInterfaceCache[i]; | |||
4402 | llvm::DIType *Ty = E.Type->getDecl()->getDefinition() | |||
4403 | ? CreateTypeDefinition(E.Type, E.Unit) | |||
4404 | : E.Decl; | |||
4405 | DBuilder.replaceTemporary(llvm::TempDIType(E.Decl), Ty); | |||
4406 | } | |||
4407 | ||||
4408 | if (CGM.getCodeGenOpts().DwarfVersion >= 5) { | |||
4409 | // Add methods to interface. | |||
4410 | for (const auto &P : ObjCMethodCache) { | |||
4411 | if (P.second.empty()) | |||
4412 | continue; | |||
4413 | ||||
4414 | QualType QTy(P.first->getTypeForDecl(), 0); | |||
4415 | auto It = TypeCache.find(QTy.getAsOpaquePtr()); | |||
4416 | assert(It != TypeCache.end())((It != TypeCache.end()) ? static_cast<void> (0) : __assert_fail ("It != TypeCache.end()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4416, __PRETTY_FUNCTION__)); | |||
4417 | ||||
4418 | llvm::DICompositeType *InterfaceDecl = | |||
4419 | cast<llvm::DICompositeType>(It->second); | |||
4420 | ||||
4421 | SmallVector<llvm::Metadata *, 16> EltTys; | |||
4422 | auto CurrenetElts = InterfaceDecl->getElements(); | |||
4423 | EltTys.append(CurrenetElts.begin(), CurrenetElts.end()); | |||
4424 | for (auto &MD : P.second) | |||
4425 | EltTys.push_back(MD); | |||
4426 | llvm::DINodeArray Elements = DBuilder.getOrCreateArray(EltTys); | |||
4427 | DBuilder.replaceArrays(InterfaceDecl, Elements); | |||
4428 | } | |||
4429 | } | |||
4430 | ||||
4431 | for (const auto &P : ReplaceMap) { | |||
4432 | assert(P.second)((P.second) ? static_cast<void> (0) : __assert_fail ("P.second" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4432, __PRETTY_FUNCTION__)); | |||
4433 | auto *Ty = cast<llvm::DIType>(P.second); | |||
4434 | assert(Ty->isForwardDecl())((Ty->isForwardDecl()) ? static_cast<void> (0) : __assert_fail ("Ty->isForwardDecl()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4434, __PRETTY_FUNCTION__)); | |||
4435 | ||||
4436 | auto It = TypeCache.find(P.first); | |||
4437 | assert(It != TypeCache.end())((It != TypeCache.end()) ? static_cast<void> (0) : __assert_fail ("It != TypeCache.end()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4437, __PRETTY_FUNCTION__)); | |||
4438 | assert(It->second)((It->second) ? static_cast<void> (0) : __assert_fail ("It->second", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4438, __PRETTY_FUNCTION__)); | |||
4439 | ||||
4440 | DBuilder.replaceTemporary(llvm::TempDIType(Ty), | |||
4441 | cast<llvm::DIType>(It->second)); | |||
4442 | } | |||
4443 | ||||
4444 | for (const auto &P : FwdDeclReplaceMap) { | |||
4445 | assert(P.second)((P.second) ? static_cast<void> (0) : __assert_fail ("P.second" , "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/CodeGen/CGDebugInfo.cpp" , 4445, __PRETTY_FUNCTION__)); | |||
4446 | llvm::TempMDNode FwdDecl(cast<llvm::MDNode>(P.second)); | |||
4447 | llvm::Metadata *Repl; | |||
4448 | ||||
4449 | auto It = DeclCache.find(P.first); | |||
4450 | // If there has been no definition for the declaration, call RAUW | |||
4451 | // with ourselves, that will destroy the temporary MDNode and | |||
4452 | // replace it with a standard one, avoiding leaking memory. | |||
4453 | if (It == DeclCache.end()) | |||
4454 | Repl = P.second; | |||
4455 | else | |||
4456 | Repl = It->second; | |||
4457 | ||||
4458 | if (auto *GVE = dyn_cast_or_null<llvm::DIGlobalVariableExpression>(Repl)) | |||
4459 | Repl = GVE->getVariable(); | |||
4460 | DBuilder.replaceTemporary(std::move(FwdDecl), cast<llvm::MDNode>(Repl)); | |||
4461 | } | |||
4462 | ||||
4463 | // We keep our own list of retained types, because we need to look | |||
4464 | // up the final type in the type cache. | |||
4465 | for (auto &RT : RetainedTypes) | |||
4466 | if (auto MD = TypeCache[RT]) | |||
4467 | DBuilder.retainType(cast<llvm::DIType>(MD)); | |||
4468 | ||||
4469 | DBuilder.finalize(); | |||
4470 | } | |||
4471 | ||||
4472 | void CGDebugInfo::EmitExplicitCastType(QualType Ty) { | |||
4473 | if (CGM.getCodeGenOpts().getDebugInfo() < codegenoptions::LimitedDebugInfo) | |||
4474 | return; | |||
4475 | ||||
4476 | if (auto *DieTy = getOrCreateType(Ty, TheCU->getFile())) | |||
4477 | // Don't ignore in case of explicit cast where it is referenced indirectly. | |||
4478 | DBuilder.retainType(DieTy); | |||
4479 | } | |||
4480 | ||||
4481 | llvm::DebugLoc CGDebugInfo::SourceLocToDebugLoc(SourceLocation Loc) { | |||
4482 | if (LexicalBlockStack.empty()) | |||
4483 | return llvm::DebugLoc(); | |||
4484 | ||||
4485 | llvm::MDNode *Scope = LexicalBlockStack.back(); | |||
4486 | return llvm::DebugLoc::get(getLineNumber(Loc), getColumnNumber(Loc), Scope); | |||
4487 | } | |||
4488 | ||||
4489 | llvm::DINode::DIFlags CGDebugInfo::getCallSiteRelatedAttrs() const { | |||
4490 | // Call site-related attributes are only useful in optimized programs, and | |||
4491 | // when there's a possibility of debugging backtraces. | |||
4492 | if (!CGM.getLangOpts().Optimize || DebugKind == codegenoptions::NoDebugInfo || | |||
4493 | DebugKind == codegenoptions::LocTrackingOnly) | |||
4494 | return llvm::DINode::FlagZero; | |||
4495 | ||||
4496 | // Call site-related attributes are available in DWARF v5. Some debuggers, | |||
4497 | // while not fully DWARF v5-compliant, may accept these attributes as if they | |||
4498 | // were part of DWARF v4. | |||
4499 | bool SupportsDWARFv4Ext = | |||
4500 | CGM.getCodeGenOpts().DwarfVersion == 4 && | |||
4501 | CGM.getCodeGenOpts().getDebuggerTuning() == llvm::DebuggerKind::LLDB; | |||
4502 | if (!SupportsDWARFv4Ext && CGM.getCodeGenOpts().DwarfVersion < 5) | |||
4503 | return llvm::DINode::FlagZero; | |||
4504 | ||||
4505 | return llvm::DINode::FlagAllCallsDescribed; | |||
4506 | } |