LLVM 19.0.0git
WasmObjectFile.cpp
Go to the documentation of this file.
1//===- WasmObjectFile.cpp - Wasm object file implementation ---------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "llvm/ADT/ArrayRef.h"
10#include "llvm/ADT/DenseSet.h"
11#include "llvm/ADT/SmallSet.h"
12#include "llvm/ADT/StringRef.h"
13#include "llvm/ADT/StringSet.h"
16#include "llvm/Object/Binary.h"
17#include "llvm/Object/Error.h"
20#include "llvm/Object/Wasm.h"
21#include "llvm/Support/Endian.h"
22#include "llvm/Support/Error.h"
24#include "llvm/Support/Format.h"
25#include "llvm/Support/LEB128.h"
29#include <algorithm>
30#include <cassert>
31#include <cstdint>
32#include <cstring>
33#include <limits>
34
35#define DEBUG_TYPE "wasm-object"
36
37using namespace llvm;
38using namespace object;
39
41 Out << "Name=" << Info.Name
42 << ", Kind=" << toString(wasm::WasmSymbolType(Info.Kind)) << ", Flags=0x"
43 << Twine::utohexstr(Info.Flags) << " [";
44 switch (getBinding()) {
45 case wasm::WASM_SYMBOL_BINDING_GLOBAL: Out << "global"; break;
46 case wasm::WASM_SYMBOL_BINDING_LOCAL: Out << "local"; break;
47 case wasm::WASM_SYMBOL_BINDING_WEAK: Out << "weak"; break;
48 }
49 if (isHidden()) {
50 Out << ", hidden";
51 } else {
52 Out << ", default";
53 }
54 Out << "]";
55 if (!isTypeData()) {
56 Out << ", ElemIndex=" << Info.ElementIndex;
57 } else if (isDefined()) {
58 Out << ", Segment=" << Info.DataRef.Segment;
59 Out << ", Offset=" << Info.DataRef.Offset;
60 Out << ", Size=" << Info.DataRef.Size;
61 }
62}
63
64#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
66#endif
67
70 Error Err = Error::success();
71 auto ObjectFile = std::make_unique<WasmObjectFile>(Buffer, Err);
72 if (Err)
73 return std::move(Err);
74
75 return std::move(ObjectFile);
76}
77
78#define VARINT7_MAX ((1 << 7) - 1)
79#define VARINT7_MIN (-(1 << 7))
80#define VARUINT7_MAX (1 << 7)
81#define VARUINT1_MAX (1)
82
84 if (Ctx.Ptr == Ctx.End)
85 report_fatal_error("EOF while reading uint8");
86 return *Ctx.Ptr++;
87}
88
90 if (Ctx.Ptr + 4 > Ctx.End)
91 report_fatal_error("EOF while reading uint32");
93 Ctx.Ptr += 4;
94 return Result;
95}
96
98 if (Ctx.Ptr + 4 > Ctx.End)
99 report_fatal_error("EOF while reading float64");
100 int32_t Result = 0;
101 memcpy(&Result, Ctx.Ptr, sizeof(Result));
102 Ctx.Ptr += sizeof(Result);
103 return Result;
104}
105
107 if (Ctx.Ptr + 8 > Ctx.End)
108 report_fatal_error("EOF while reading float64");
109 int64_t Result = 0;
110 memcpy(&Result, Ctx.Ptr, sizeof(Result));
111 Ctx.Ptr += sizeof(Result);
112 return Result;
113}
114
116 unsigned Count;
117 const char *Error = nullptr;
118 uint64_t Result = decodeULEB128(Ctx.Ptr, &Count, Ctx.End, &Error);
119 if (Error)
121 Ctx.Ptr += Count;
122 return Result;
123}
124
126 uint32_t StringLen = readULEB128(Ctx);
127 if (Ctx.Ptr + StringLen > Ctx.End)
128 report_fatal_error("EOF while reading string");
129 StringRef Return =
130 StringRef(reinterpret_cast<const char *>(Ctx.Ptr), StringLen);
131 Ctx.Ptr += StringLen;
132 return Return;
133}
134
136 unsigned Count;
137 const char *Error = nullptr;
138 uint64_t Result = decodeSLEB128(Ctx.Ptr, &Count, Ctx.End, &Error);
139 if (Error)
141 Ctx.Ptr += Count;
142 return Result;
143}
144
146 int64_t Result = readLEB128(Ctx);
147 if (Result > VARUINT1_MAX || Result < 0)
148 report_fatal_error("LEB is outside Varuint1 range");
149 return Result;
150}
151
153 int64_t Result = readLEB128(Ctx);
154 if (Result > INT32_MAX || Result < INT32_MIN)
155 report_fatal_error("LEB is outside Varint32 range");
156 return Result;
157}
158
160 uint64_t Result = readULEB128(Ctx);
161 if (Result > UINT32_MAX)
162 report_fatal_error("LEB is outside Varuint32 range");
163 return Result;
164}
165
167 return readLEB128(Ctx);
168}
169
171 return readULEB128(Ctx);
172}
173
175 return readUint8(Ctx);
176}
177
179 uint32_t Code) {
180 // only directly encoded FUNCREF/EXTERNREF are supported
181 // (not ref null func or ref null extern)
182 switch (Code) {
190 return wasm::ValType(Code);
191 }
193 /* Discard HeapType */ readVarint64(Ctx);
194 }
196}
197
200 auto Start = Ctx.Ptr;
201
202 Expr.Extended = false;
203 Expr.Inst.Opcode = readOpcode(Ctx);
204 switch (Expr.Inst.Opcode) {
206 Expr.Inst.Value.Int32 = readVarint32(Ctx);
207 break;
209 Expr.Inst.Value.Int64 = readVarint64(Ctx);
210 break;
212 Expr.Inst.Value.Float32 = readFloat32(Ctx);
213 break;
215 Expr.Inst.Value.Float64 = readFloat64(Ctx);
216 break;
218 Expr.Inst.Value.Global = readULEB128(Ctx);
219 break;
221 /* Discard type */ parseValType(Ctx, readVaruint32(Ctx));
222 break;
223 }
224 default:
225 Expr.Extended = true;
226 }
227
228 if (!Expr.Extended) {
229 uint8_t EndOpcode = readOpcode(Ctx);
230 if (EndOpcode != wasm::WASM_OPCODE_END)
231 Expr.Extended = true;
232 }
233
234 if (Expr.Extended) {
235 Ctx.Ptr = Start;
236 while (true) {
237 uint8_t Opcode = readOpcode(Ctx);
238 switch (Opcode) {
244 readULEB128(Ctx);
245 break;
247 readFloat32(Ctx);
248 break;
250 readFloat64(Ctx);
251 break;
258 break;
260 break;
261 // The GC opcodes are in a separate (prefixed space). This flat switch
262 // structure works as long as there is no overlap between the GC and
263 // general opcodes used in init exprs.
268 readULEB128(Ctx); // heap type index
269 break;
271 readULEB128(Ctx); // heap type index
272 readULEB128(Ctx); // array size
273 break;
275 break;
277 Expr.Body = ArrayRef<uint8_t>(Start, Ctx.Ptr - Start);
278 return Error::success();
279 default:
280 return make_error<GenericBinaryError>(
281 Twine("invalid opcode in init_expr: ") + Twine(unsigned(Opcode)),
283 }
284 }
285 }
286
287 return Error::success();
288}
289
291 wasm::WasmLimits Result;
292 Result.Flags = readVaruint32(Ctx);
293 Result.Minimum = readVaruint64(Ctx);
294 if (Result.Flags & wasm::WASM_LIMITS_FLAG_HAS_MAX)
295 Result.Maximum = readVaruint64(Ctx);
296 return Result;
297}
298
300 wasm::WasmTableType TableType;
301 auto ElemType = parseValType(Ctx, readVaruint32(Ctx));
302 TableType.ElemType = ElemType;
303 TableType.Limits = readLimits(Ctx);
304 return TableType;
305}
306
308 WasmSectionOrderChecker &Checker) {
309 Section.Type = readUint8(Ctx);
310 LLVM_DEBUG(dbgs() << "readSection type=" << Section.Type << "\n");
311 // When reading the section's size, store the size of the LEB used to encode
312 // it. This allows objcopy/strip to reproduce the binary identically.
313 const uint8_t *PreSizePtr = Ctx.Ptr;
315 Section.HeaderSecSizeEncodingLen = Ctx.Ptr - PreSizePtr;
316 Section.Offset = Ctx.Ptr - Ctx.Start;
317 if (Size == 0)
318 return make_error<StringError>("zero length section",
320 if (Ctx.Ptr + Size > Ctx.End)
321 return make_error<StringError>("section too large",
323 if (Section.Type == wasm::WASM_SEC_CUSTOM) {
325 SectionCtx.Start = Ctx.Ptr;
326 SectionCtx.Ptr = Ctx.Ptr;
327 SectionCtx.End = Ctx.Ptr + Size;
328
329 Section.Name = readString(SectionCtx);
330
331 uint32_t SectionNameSize = SectionCtx.Ptr - SectionCtx.Start;
332 Ctx.Ptr += SectionNameSize;
333 Size -= SectionNameSize;
334 }
335
336 if (!Checker.isValidSectionOrder(Section.Type, Section.Name)) {
337 return make_error<StringError>("out of order section type: " +
338 llvm::to_string(Section.Type),
340 }
341
342 Section.Content = ArrayRef<uint8_t>(Ctx.Ptr, Size);
343 Ctx.Ptr += Size;
344 return Error::success();
345}
346
348 : ObjectFile(Binary::ID_Wasm, Buffer) {
349 ErrorAsOutParameter ErrAsOutParam(&Err);
350 Header.Magic = getData().substr(0, 4);
351 if (Header.Magic != StringRef("\0asm", 4)) {
352 Err = make_error<StringError>("invalid magic number",
354 return;
355 }
356
357 ReadContext Ctx;
358 Ctx.Start = getData().bytes_begin();
359 Ctx.Ptr = Ctx.Start + 4;
360 Ctx.End = Ctx.Start + getData().size();
361
362 if (Ctx.Ptr + 4 > Ctx.End) {
363 Err = make_error<StringError>("missing version number",
365 return;
366 }
367
368 Header.Version = readUint32(Ctx);
369 if (Header.Version != wasm::WasmVersion) {
370 Err = make_error<StringError>("invalid version number: " +
371 Twine(Header.Version),
373 return;
374 }
375
377 while (Ctx.Ptr < Ctx.End) {
378 WasmSection Sec;
379 if ((Err = readSection(Sec, Ctx, Checker)))
380 return;
381 if ((Err = parseSection(Sec)))
382 return;
383
384 Sections.push_back(Sec);
385 }
386}
387
388Error WasmObjectFile::parseSection(WasmSection &Sec) {
389 ReadContext Ctx;
390 Ctx.Start = Sec.Content.data();
391 Ctx.End = Ctx.Start + Sec.Content.size();
392 Ctx.Ptr = Ctx.Start;
393 switch (Sec.Type) {
395 return parseCustomSection(Sec, Ctx);
397 return parseTypeSection(Ctx);
399 return parseImportSection(Ctx);
401 return parseFunctionSection(Ctx);
403 return parseTableSection(Ctx);
405 return parseMemorySection(Ctx);
407 return parseTagSection(Ctx);
409 return parseGlobalSection(Ctx);
411 return parseExportSection(Ctx);
413 return parseStartSection(Ctx);
415 return parseElemSection(Ctx);
417 return parseCodeSection(Ctx);
419 return parseDataSection(Ctx);
421 return parseDataCountSection(Ctx);
422 default:
423 return make_error<GenericBinaryError>(
424 "invalid section type: " + Twine(Sec.Type), object_error::parse_failed);
425 }
426}
427
428Error WasmObjectFile::parseDylinkSection(ReadContext &Ctx) {
429 // Legacy "dylink" section support.
430 // See parseDylink0Section for the current "dylink.0" section parsing.
431 HasDylinkSection = true;
432 DylinkInfo.MemorySize = readVaruint32(Ctx);
433 DylinkInfo.MemoryAlignment = readVaruint32(Ctx);
434 DylinkInfo.TableSize = readVaruint32(Ctx);
435 DylinkInfo.TableAlignment = readVaruint32(Ctx);
436 uint32_t Count = readVaruint32(Ctx);
437 while (Count--) {
438 DylinkInfo.Needed.push_back(readString(Ctx));
439 }
440
441 if (Ctx.Ptr != Ctx.End)
442 return make_error<GenericBinaryError>("dylink section ended prematurely",
444 return Error::success();
445}
446
447Error WasmObjectFile::parseDylink0Section(ReadContext &Ctx) {
448 // See
449 // https://github.com/WebAssembly/tool-conventions/blob/main/DynamicLinking.md
450 HasDylinkSection = true;
451
452 const uint8_t *OrigEnd = Ctx.End;
453 while (Ctx.Ptr < OrigEnd) {
454 Ctx.End = OrigEnd;
455 uint8_t Type = readUint8(Ctx);
457 LLVM_DEBUG(dbgs() << "readSubsection type=" << int(Type) << " size=" << Size
458 << "\n");
459 Ctx.End = Ctx.Ptr + Size;
460 uint32_t Count;
461 switch (Type) {
463 DylinkInfo.MemorySize = readVaruint32(Ctx);
464 DylinkInfo.MemoryAlignment = readVaruint32(Ctx);
465 DylinkInfo.TableSize = readVaruint32(Ctx);
466 DylinkInfo.TableAlignment = readVaruint32(Ctx);
467 break;
469 Count = readVaruint32(Ctx);
470 while (Count--) {
471 DylinkInfo.Needed.push_back(readString(Ctx));
472 }
473 break;
475 uint32_t Count = readVaruint32(Ctx);
476 while (Count--) {
477 DylinkInfo.ExportInfo.push_back({readString(Ctx), readVaruint32(Ctx)});
478 }
479 break;
480 }
482 uint32_t Count = readVaruint32(Ctx);
483 while (Count--) {
484 DylinkInfo.ImportInfo.push_back(
485 {readString(Ctx), readString(Ctx), readVaruint32(Ctx)});
486 }
487 break;
488 }
489 default:
490 LLVM_DEBUG(dbgs() << "unknown dylink.0 sub-section: " << Type << "\n");
491 Ctx.Ptr += Size;
492 break;
493 }
494 if (Ctx.Ptr != Ctx.End) {
495 return make_error<GenericBinaryError>(
496 "dylink.0 sub-section ended prematurely", object_error::parse_failed);
497 }
498 }
499
500 if (Ctx.Ptr != Ctx.End)
501 return make_error<GenericBinaryError>("dylink.0 section ended prematurely",
503 return Error::success();
504}
505
506Error WasmObjectFile::parseNameSection(ReadContext &Ctx) {
507 llvm::DenseSet<uint64_t> SeenFunctions;
508 llvm::DenseSet<uint64_t> SeenGlobals;
509 llvm::DenseSet<uint64_t> SeenSegments;
510
511 // If there is symbol info from the export section, this info will supersede
512 // it, but not info from a linking section
513 if (!HasLinkingSection) {
514 Symbols.clear();
515 }
516
517 while (Ctx.Ptr < Ctx.End) {
518 uint8_t Type = readUint8(Ctx);
520 const uint8_t *SubSectionEnd = Ctx.Ptr + Size;
521
522 switch (Type) {
526 uint32_t Count = readVaruint32(Ctx);
527 while (Count--) {
533 /* Flags */ 0,
534 /* ImportModule */ std::nullopt,
535 /* ImportName */ std::nullopt,
536 /* ExportName */ std::nullopt,
537 {/* ElementIndex */ Index}};
538 const wasm::WasmSignature *Signature = nullptr;
539 const wasm::WasmGlobalType *GlobalType = nullptr;
540 const wasm::WasmTableType *TableType = nullptr;
542 if (!SeenFunctions.insert(Index).second)
543 return make_error<GenericBinaryError>(
544 "function named more than once", object_error::parse_failed);
545 if (!isValidFunctionIndex(Index) || Name.empty())
546 return make_error<GenericBinaryError>("invalid function name entry",
548
549 if (isDefinedFunctionIndex(Index)) {
550 wasm::WasmFunction &F = getDefinedFunction(Index);
551 F.DebugName = Name;
552 Signature = &Signatures[F.SigIndex];
553 if (F.ExportName) {
554 Info.ExportName = F.ExportName;
556 } else {
558 }
559 } else {
561 }
562 } else if (Type == wasm::WASM_NAMES_GLOBAL) {
563 if (!SeenGlobals.insert(Index).second)
564 return make_error<GenericBinaryError>("global named more than once",
566 if (!isValidGlobalIndex(Index) || Name.empty())
567 return make_error<GenericBinaryError>("invalid global name entry",
569 nameType = wasm::NameType::GLOBAL;
571 if (isDefinedGlobalIndex(Index)) {
572 GlobalType = &getDefinedGlobal(Index).Type;
573 } else {
575 }
576 } else {
577 if (!SeenSegments.insert(Index).second)
578 return make_error<GenericBinaryError>(
579 "segment named more than once", object_error::parse_failed);
580 if (Index > DataSegments.size())
581 return make_error<GenericBinaryError>("invalid data segment name entry",
586 assert(Index < DataSegments.size());
588 Index, 0, DataSegments[Index].Data.Content.size()};
589 }
590 DebugNames.push_back(wasm::WasmDebugName{nameType, Index, Name});
591 if (!HasLinkingSection)
592 Symbols.emplace_back(Info, GlobalType, TableType, Signature);
593 }
594 break;
595 }
596 // Ignore local names for now
598 default:
599 Ctx.Ptr += Size;
600 break;
601 }
602 if (Ctx.Ptr != SubSectionEnd)
603 return make_error<GenericBinaryError>(
604 "name sub-section ended prematurely", object_error::parse_failed);
605 }
606
607 if (Ctx.Ptr != Ctx.End)
608 return make_error<GenericBinaryError>("name section ended prematurely",
610 return Error::success();
611}
612
613Error WasmObjectFile::parseLinkingSection(ReadContext &Ctx) {
614 HasLinkingSection = true;
615
616 LinkingData.Version = readVaruint32(Ctx);
617 if (LinkingData.Version != wasm::WasmMetadataVersion) {
618 return make_error<GenericBinaryError>(
619 "unexpected metadata version: " + Twine(LinkingData.Version) +
620 " (Expected: " + Twine(wasm::WasmMetadataVersion) + ")",
622 }
623
624 const uint8_t *OrigEnd = Ctx.End;
625 while (Ctx.Ptr < OrigEnd) {
626 Ctx.End = OrigEnd;
627 uint8_t Type = readUint8(Ctx);
629 LLVM_DEBUG(dbgs() << "readSubsection type=" << int(Type) << " size=" << Size
630 << "\n");
631 Ctx.End = Ctx.Ptr + Size;
632 switch (Type) {
634 if (Error Err = parseLinkingSectionSymtab(Ctx))
635 return Err;
636 break;
638 uint32_t Count = readVaruint32(Ctx);
639 if (Count > DataSegments.size())
640 return make_error<GenericBinaryError>("too many segment names",
642 for (uint32_t I = 0; I < Count; I++) {
643 DataSegments[I].Data.Name = readString(Ctx);
644 DataSegments[I].Data.Alignment = readVaruint32(Ctx);
645 DataSegments[I].Data.LinkingFlags = readVaruint32(Ctx);
646 }
647 break;
648 }
650 uint32_t Count = readVaruint32(Ctx);
651 LinkingData.InitFunctions.reserve(Count);
652 for (uint32_t I = 0; I < Count; I++) {
654 Init.Priority = readVaruint32(Ctx);
655 Init.Symbol = readVaruint32(Ctx);
656 if (!isValidFunctionSymbol(Init.Symbol))
657 return make_error<GenericBinaryError>("invalid function symbol: " +
658 Twine(Init.Symbol),
660 LinkingData.InitFunctions.emplace_back(Init);
661 }
662 break;
663 }
665 if (Error Err = parseLinkingSectionComdat(Ctx))
666 return Err;
667 break;
668 default:
669 Ctx.Ptr += Size;
670 break;
671 }
672 if (Ctx.Ptr != Ctx.End)
673 return make_error<GenericBinaryError>(
674 "linking sub-section ended prematurely", object_error::parse_failed);
675 }
676 if (Ctx.Ptr != OrigEnd)
677 return make_error<GenericBinaryError>("linking section ended prematurely",
679 return Error::success();
680}
681
682Error WasmObjectFile::parseLinkingSectionSymtab(ReadContext &Ctx) {
683 uint32_t Count = readVaruint32(Ctx);
684 // Clear out any symbol information that was derived from the exports
685 // section.
686 Symbols.clear();
687 Symbols.reserve(Count);
688 StringSet<> SymbolNames;
689
690 std::vector<wasm::WasmImport *> ImportedGlobals;
691 std::vector<wasm::WasmImport *> ImportedFunctions;
692 std::vector<wasm::WasmImport *> ImportedTags;
693 std::vector<wasm::WasmImport *> ImportedTables;
694 ImportedGlobals.reserve(Imports.size());
695 ImportedFunctions.reserve(Imports.size());
696 ImportedTags.reserve(Imports.size());
697 ImportedTables.reserve(Imports.size());
698 for (auto &I : Imports) {
700 ImportedFunctions.emplace_back(&I);
701 else if (I.Kind == wasm::WASM_EXTERNAL_GLOBAL)
702 ImportedGlobals.emplace_back(&I);
703 else if (I.Kind == wasm::WASM_EXTERNAL_TAG)
704 ImportedTags.emplace_back(&I);
705 else if (I.Kind == wasm::WASM_EXTERNAL_TABLE)
706 ImportedTables.emplace_back(&I);
707 }
708
709 while (Count--) {
711 const wasm::WasmSignature *Signature = nullptr;
712 const wasm::WasmGlobalType *GlobalType = nullptr;
713 const wasm::WasmTableType *TableType = nullptr;
714
715 Info.Kind = readUint8(Ctx);
716 Info.Flags = readVaruint32(Ctx);
717 bool IsDefined = (Info.Flags & wasm::WASM_SYMBOL_UNDEFINED) == 0;
718
719 switch (Info.Kind) {
721 Info.ElementIndex = readVaruint32(Ctx);
722 if (!isValidFunctionIndex(Info.ElementIndex) ||
723 IsDefined != isDefinedFunctionIndex(Info.ElementIndex))
724 return make_error<GenericBinaryError>("invalid function symbol index",
726 if (IsDefined) {
727 Info.Name = readString(Ctx);
728 unsigned FuncIndex = Info.ElementIndex - NumImportedFunctions;
729 wasm::WasmFunction &Function = Functions[FuncIndex];
730 Signature = &Signatures[Function.SigIndex];
731 if (Function.SymbolName.empty())
732 Function.SymbolName = Info.Name;
733 } else {
734 wasm::WasmImport &Import = *ImportedFunctions[Info.ElementIndex];
735 if ((Info.Flags & wasm::WASM_SYMBOL_EXPLICIT_NAME) != 0) {
736 Info.Name = readString(Ctx);
737 Info.ImportName = Import.Field;
738 } else {
739 Info.Name = Import.Field;
740 }
741 Signature = &Signatures[Import.SigIndex];
742 Info.ImportModule = Import.Module;
743 }
744 break;
745
747 Info.ElementIndex = readVaruint32(Ctx);
748 if (!isValidGlobalIndex(Info.ElementIndex) ||
749 IsDefined != isDefinedGlobalIndex(Info.ElementIndex))
750 return make_error<GenericBinaryError>("invalid global symbol index",
752 if (!IsDefined && (Info.Flags & wasm::WASM_SYMBOL_BINDING_MASK) ==
754 return make_error<GenericBinaryError>("undefined weak global symbol",
756 if (IsDefined) {
757 Info.Name = readString(Ctx);
758 unsigned GlobalIndex = Info.ElementIndex - NumImportedGlobals;
759 wasm::WasmGlobal &Global = Globals[GlobalIndex];
760 GlobalType = &Global.Type;
761 if (Global.SymbolName.empty())
762 Global.SymbolName = Info.Name;
763 } else {
764 wasm::WasmImport &Import = *ImportedGlobals[Info.ElementIndex];
765 if ((Info.Flags & wasm::WASM_SYMBOL_EXPLICIT_NAME) != 0) {
766 Info.Name = readString(Ctx);
767 Info.ImportName = Import.Field;
768 } else {
769 Info.Name = Import.Field;
770 }
771 GlobalType = &Import.Global;
772 Info.ImportModule = Import.Module;
773 }
774 break;
775
777 Info.ElementIndex = readVaruint32(Ctx);
778 if (!isValidTableNumber(Info.ElementIndex) ||
779 IsDefined != isDefinedTableNumber(Info.ElementIndex))
780 return make_error<GenericBinaryError>("invalid table symbol index",
782 if (!IsDefined && (Info.Flags & wasm::WASM_SYMBOL_BINDING_MASK) ==
784 return make_error<GenericBinaryError>("undefined weak table symbol",
786 if (IsDefined) {
787 Info.Name = readString(Ctx);
788 unsigned TableNumber = Info.ElementIndex - NumImportedTables;
789 wasm::WasmTable &Table = Tables[TableNumber];
790 TableType = &Table.Type;
791 if (Table.SymbolName.empty())
792 Table.SymbolName = Info.Name;
793 } else {
794 wasm::WasmImport &Import = *ImportedTables[Info.ElementIndex];
795 if ((Info.Flags & wasm::WASM_SYMBOL_EXPLICIT_NAME) != 0) {
796 Info.Name = readString(Ctx);
797 Info.ImportName = Import.Field;
798 } else {
799 Info.Name = Import.Field;
800 }
801 TableType = &Import.Table;
802 Info.ImportModule = Import.Module;
803 }
804 break;
805
807 Info.Name = readString(Ctx);
808 if (IsDefined) {
809 auto Index = readVaruint32(Ctx);
810 auto Offset = readVaruint64(Ctx);
811 auto Size = readVaruint64(Ctx);
812 if (!(Info.Flags & wasm::WASM_SYMBOL_ABSOLUTE)) {
813 if (static_cast<size_t>(Index) >= DataSegments.size())
814 return make_error<GenericBinaryError>(
815 "invalid data segment index: " + Twine(Index),
817 size_t SegmentSize = DataSegments[Index].Data.Content.size();
818 if (Offset > SegmentSize)
819 return make_error<GenericBinaryError>(
820 "invalid data symbol offset: `" + Info.Name +
821 "` (offset: " + Twine(Offset) +
822 " segment size: " + Twine(SegmentSize) + ")",
824 }
826 }
827 break;
828
830 if ((Info.Flags & wasm::WASM_SYMBOL_BINDING_MASK) !=
832 return make_error<GenericBinaryError>(
833 "section symbols must have local binding",
835 Info.ElementIndex = readVaruint32(Ctx);
836 // Use somewhat unique section name as symbol name.
837 StringRef SectionName = Sections[Info.ElementIndex].Name;
838 Info.Name = SectionName;
839 break;
840 }
841
843 Info.ElementIndex = readVaruint32(Ctx);
844 if (!isValidTagIndex(Info.ElementIndex) ||
845 IsDefined != isDefinedTagIndex(Info.ElementIndex))
846 return make_error<GenericBinaryError>("invalid tag symbol index",
848 if (!IsDefined && (Info.Flags & wasm::WASM_SYMBOL_BINDING_MASK) ==
850 return make_error<GenericBinaryError>("undefined weak global symbol",
852 if (IsDefined) {
853 Info.Name = readString(Ctx);
854 unsigned TagIndex = Info.ElementIndex - NumImportedTags;
855 wasm::WasmTag &Tag = Tags[TagIndex];
856 Signature = &Signatures[Tag.SigIndex];
857 if (Tag.SymbolName.empty())
858 Tag.SymbolName = Info.Name;
859
860 } else {
861 wasm::WasmImport &Import = *ImportedTags[Info.ElementIndex];
862 if ((Info.Flags & wasm::WASM_SYMBOL_EXPLICIT_NAME) != 0) {
863 Info.Name = readString(Ctx);
864 Info.ImportName = Import.Field;
865 } else {
866 Info.Name = Import.Field;
867 }
868 Signature = &Signatures[Import.SigIndex];
869 Info.ImportModule = Import.Module;
870 }
871 break;
872 }
873
874 default:
875 return make_error<GenericBinaryError>("invalid symbol type: " +
876 Twine(unsigned(Info.Kind)),
878 }
879
880 if ((Info.Flags & wasm::WASM_SYMBOL_BINDING_MASK) !=
882 !SymbolNames.insert(Info.Name).second)
883 return make_error<GenericBinaryError>("duplicate symbol name " +
884 Twine(Info.Name),
886 Symbols.emplace_back(Info, GlobalType, TableType, Signature);
887 LLVM_DEBUG(dbgs() << "Adding symbol: " << Symbols.back() << "\n");
888 }
889
890 return Error::success();
891}
892
893Error WasmObjectFile::parseLinkingSectionComdat(ReadContext &Ctx) {
894 uint32_t ComdatCount = readVaruint32(Ctx);
895 StringSet<> ComdatSet;
896 for (unsigned ComdatIndex = 0; ComdatIndex < ComdatCount; ++ComdatIndex) {
898 if (Name.empty() || !ComdatSet.insert(Name).second)
899 return make_error<GenericBinaryError>("bad/duplicate COMDAT name " +
900 Twine(Name),
902 LinkingData.Comdats.emplace_back(Name);
904 if (Flags != 0)
905 return make_error<GenericBinaryError>("unsupported COMDAT flags",
907
908 uint32_t EntryCount = readVaruint32(Ctx);
909 while (EntryCount--) {
910 unsigned Kind = readVaruint32(Ctx);
911 unsigned Index = readVaruint32(Ctx);
912 switch (Kind) {
913 default:
914 return make_error<GenericBinaryError>("invalid COMDAT entry type",
917 if (Index >= DataSegments.size())
918 return make_error<GenericBinaryError>(
919 "COMDAT data index out of range", object_error::parse_failed);
920 if (DataSegments[Index].Data.Comdat != UINT32_MAX)
921 return make_error<GenericBinaryError>("data segment in two COMDATs",
923 DataSegments[Index].Data.Comdat = ComdatIndex;
924 break;
926 if (!isDefinedFunctionIndex(Index))
927 return make_error<GenericBinaryError>(
928 "COMDAT function index out of range", object_error::parse_failed);
929 if (getDefinedFunction(Index).Comdat != UINT32_MAX)
930 return make_error<GenericBinaryError>("function in two COMDATs",
932 getDefinedFunction(Index).Comdat = ComdatIndex;
933 break;
935 if (Index >= Sections.size())
936 return make_error<GenericBinaryError>(
937 "COMDAT section index out of range", object_error::parse_failed);
938 if (Sections[Index].Type != wasm::WASM_SEC_CUSTOM)
939 return make_error<GenericBinaryError>(
940 "non-custom section in a COMDAT", object_error::parse_failed);
941 Sections[Index].Comdat = ComdatIndex;
942 break;
943 }
944 }
945 }
946 return Error::success();
947}
948
949Error WasmObjectFile::parseProducersSection(ReadContext &Ctx) {
951 uint32_t Fields = readVaruint32(Ctx);
952 for (size_t I = 0; I < Fields; ++I) {
953 StringRef FieldName = readString(Ctx);
954 if (!FieldsSeen.insert(FieldName).second)
955 return make_error<GenericBinaryError>(
956 "producers section does not have unique fields",
958 std::vector<std::pair<std::string, std::string>> *ProducerVec = nullptr;
959 if (FieldName == "language") {
960 ProducerVec = &ProducerInfo.Languages;
961 } else if (FieldName == "processed-by") {
962 ProducerVec = &ProducerInfo.Tools;
963 } else if (FieldName == "sdk") {
964 ProducerVec = &ProducerInfo.SDKs;
965 } else {
966 return make_error<GenericBinaryError>(
967 "producers section field is not named one of language, processed-by, "
968 "or sdk",
970 }
971 uint32_t ValueCount = readVaruint32(Ctx);
972 llvm::SmallSet<StringRef, 8> ProducersSeen;
973 for (size_t J = 0; J < ValueCount; ++J) {
976 if (!ProducersSeen.insert(Name).second) {
977 return make_error<GenericBinaryError>(
978 "producers section contains repeated producer",
980 }
981 ProducerVec->emplace_back(std::string(Name), std::string(Version));
982 }
983 }
984 if (Ctx.Ptr != Ctx.End)
985 return make_error<GenericBinaryError>("producers section ended prematurely",
987 return Error::success();
988}
989
990Error WasmObjectFile::parseTargetFeaturesSection(ReadContext &Ctx) {
993 for (size_t I = 0; I < FeatureCount; ++I) {
995 Feature.Prefix = readUint8(Ctx);
996 switch (Feature.Prefix) {
1000 break;
1001 default:
1002 return make_error<GenericBinaryError>("unknown feature policy prefix",
1004 }
1005 Feature.Name = std::string(readString(Ctx));
1006 if (!FeaturesSeen.insert(Feature.Name).second)
1007 return make_error<GenericBinaryError>(
1008 "target features section contains repeated feature \"" +
1009 Feature.Name + "\"",
1011 TargetFeatures.push_back(Feature);
1012 }
1013 if (Ctx.Ptr != Ctx.End)
1014 return make_error<GenericBinaryError>(
1015 "target features section ended prematurely",
1017 return Error::success();
1018}
1019
1020Error WasmObjectFile::parseRelocSection(StringRef Name, ReadContext &Ctx) {
1021 uint32_t SectionIndex = readVaruint32(Ctx);
1022 if (SectionIndex >= Sections.size())
1023 return make_error<GenericBinaryError>("invalid section index",
1025 WasmSection &Section = Sections[SectionIndex];
1026 uint32_t RelocCount = readVaruint32(Ctx);
1027 uint32_t EndOffset = Section.Content.size();
1028 uint32_t PreviousOffset = 0;
1029 while (RelocCount--) {
1030 wasm::WasmRelocation Reloc = {};
1031 uint32_t type = readVaruint32(Ctx);
1032 Reloc.Type = type;
1033 Reloc.Offset = readVaruint32(Ctx);
1034 if (Reloc.Offset < PreviousOffset)
1035 return make_error<GenericBinaryError>("relocations not in offset order",
1037
1038 auto badReloc = [&](StringRef msg) {
1039 return make_error<GenericBinaryError>(
1040 msg + ": " + Twine(Symbols[Reloc.Index].Info.Name),
1042 };
1043
1044 PreviousOffset = Reloc.Offset;
1045 Reloc.Index = readVaruint32(Ctx);
1046 switch (type) {
1047 case wasm::R_WASM_FUNCTION_INDEX_LEB:
1048 case wasm::R_WASM_FUNCTION_INDEX_I32:
1049 case wasm::R_WASM_TABLE_INDEX_SLEB:
1050 case wasm::R_WASM_TABLE_INDEX_SLEB64:
1051 case wasm::R_WASM_TABLE_INDEX_I32:
1052 case wasm::R_WASM_TABLE_INDEX_I64:
1053 case wasm::R_WASM_TABLE_INDEX_REL_SLEB:
1054 case wasm::R_WASM_TABLE_INDEX_REL_SLEB64:
1055 if (!isValidFunctionSymbol(Reloc.Index))
1056 return badReloc("invalid function relocation");
1057 break;
1058 case wasm::R_WASM_TABLE_NUMBER_LEB:
1059 if (!isValidTableSymbol(Reloc.Index))
1060 return badReloc("invalid table relocation");
1061 break;
1062 case wasm::R_WASM_TYPE_INDEX_LEB:
1063 if (Reloc.Index >= Signatures.size())
1064 return badReloc("invalid relocation type index");
1065 break;
1066 case wasm::R_WASM_GLOBAL_INDEX_LEB:
1067 // R_WASM_GLOBAL_INDEX_LEB are can be used against function and data
1068 // symbols to refer to their GOT entries.
1069 if (!isValidGlobalSymbol(Reloc.Index) &&
1070 !isValidDataSymbol(Reloc.Index) &&
1071 !isValidFunctionSymbol(Reloc.Index))
1072 return badReloc("invalid global relocation");
1073 break;
1074 case wasm::R_WASM_GLOBAL_INDEX_I32:
1075 if (!isValidGlobalSymbol(Reloc.Index))
1076 return badReloc("invalid global relocation");
1077 break;
1078 case wasm::R_WASM_TAG_INDEX_LEB:
1079 if (!isValidTagSymbol(Reloc.Index))
1080 return badReloc("invalid tag relocation");
1081 break;
1082 case wasm::R_WASM_MEMORY_ADDR_LEB:
1083 case wasm::R_WASM_MEMORY_ADDR_SLEB:
1084 case wasm::R_WASM_MEMORY_ADDR_I32:
1085 case wasm::R_WASM_MEMORY_ADDR_REL_SLEB:
1086 case wasm::R_WASM_MEMORY_ADDR_TLS_SLEB:
1087 case wasm::R_WASM_MEMORY_ADDR_LOCREL_I32:
1088 if (!isValidDataSymbol(Reloc.Index))
1089 return badReloc("invalid data relocation");
1090 Reloc.Addend = readVarint32(Ctx);
1091 break;
1092 case wasm::R_WASM_MEMORY_ADDR_LEB64:
1093 case wasm::R_WASM_MEMORY_ADDR_SLEB64:
1094 case wasm::R_WASM_MEMORY_ADDR_I64:
1095 case wasm::R_WASM_MEMORY_ADDR_REL_SLEB64:
1096 case wasm::R_WASM_MEMORY_ADDR_TLS_SLEB64:
1097 if (!isValidDataSymbol(Reloc.Index))
1098 return badReloc("invalid data relocation");
1099 Reloc.Addend = readVarint64(Ctx);
1100 break;
1101 case wasm::R_WASM_FUNCTION_OFFSET_I32:
1102 if (!isValidFunctionSymbol(Reloc.Index))
1103 return badReloc("invalid function relocation");
1104 Reloc.Addend = readVarint32(Ctx);
1105 break;
1106 case wasm::R_WASM_FUNCTION_OFFSET_I64:
1107 if (!isValidFunctionSymbol(Reloc.Index))
1108 return badReloc("invalid function relocation");
1109 Reloc.Addend = readVarint64(Ctx);
1110 break;
1111 case wasm::R_WASM_SECTION_OFFSET_I32:
1112 if (!isValidSectionSymbol(Reloc.Index))
1113 return badReloc("invalid section relocation");
1114 Reloc.Addend = readVarint32(Ctx);
1115 break;
1116 default:
1117 return make_error<GenericBinaryError>("invalid relocation type: " +
1118 Twine(type),
1120 }
1121
1122 // Relocations must fit inside the section, and must appear in order. They
1123 // also shouldn't overlap a function/element boundary, but we don't bother
1124 // to check that.
1125 uint64_t Size = 5;
1126 if (Reloc.Type == wasm::R_WASM_MEMORY_ADDR_LEB64 ||
1127 Reloc.Type == wasm::R_WASM_MEMORY_ADDR_SLEB64 ||
1128 Reloc.Type == wasm::R_WASM_MEMORY_ADDR_REL_SLEB64)
1129 Size = 10;
1130 if (Reloc.Type == wasm::R_WASM_TABLE_INDEX_I32 ||
1131 Reloc.Type == wasm::R_WASM_MEMORY_ADDR_I32 ||
1132 Reloc.Type == wasm::R_WASM_MEMORY_ADDR_LOCREL_I32 ||
1133 Reloc.Type == wasm::R_WASM_SECTION_OFFSET_I32 ||
1134 Reloc.Type == wasm::R_WASM_FUNCTION_OFFSET_I32 ||
1135 Reloc.Type == wasm::R_WASM_FUNCTION_INDEX_I32 ||
1136 Reloc.Type == wasm::R_WASM_GLOBAL_INDEX_I32)
1137 Size = 4;
1138 if (Reloc.Type == wasm::R_WASM_TABLE_INDEX_I64 ||
1139 Reloc.Type == wasm::R_WASM_MEMORY_ADDR_I64 ||
1140 Reloc.Type == wasm::R_WASM_FUNCTION_OFFSET_I64)
1141 Size = 8;
1142 if (Reloc.Offset + Size > EndOffset)
1143 return make_error<GenericBinaryError>("invalid relocation offset",
1145
1146 Section.Relocations.push_back(Reloc);
1147 }
1148 if (Ctx.Ptr != Ctx.End)
1149 return make_error<GenericBinaryError>("reloc section ended prematurely",
1151 return Error::success();
1152}
1153
1154Error WasmObjectFile::parseCustomSection(WasmSection &Sec, ReadContext &Ctx) {
1155 if (Sec.Name == "dylink") {
1156 if (Error Err = parseDylinkSection(Ctx))
1157 return Err;
1158 } else if (Sec.Name == "dylink.0") {
1159 if (Error Err = parseDylink0Section(Ctx))
1160 return Err;
1161 } else if (Sec.Name == "name") {
1162 if (Error Err = parseNameSection(Ctx))
1163 return Err;
1164 } else if (Sec.Name == "linking") {
1165 if (Error Err = parseLinkingSection(Ctx))
1166 return Err;
1167 } else if (Sec.Name == "producers") {
1168 if (Error Err = parseProducersSection(Ctx))
1169 return Err;
1170 } else if (Sec.Name == "target_features") {
1171 if (Error Err = parseTargetFeaturesSection(Ctx))
1172 return Err;
1173 } else if (Sec.Name.starts_with("reloc.")) {
1174 if (Error Err = parseRelocSection(Sec.Name, Ctx))
1175 return Err;
1176 }
1177 return Error::success();
1178}
1179
1180Error WasmObjectFile::parseTypeSection(ReadContext &Ctx) {
1181 auto parseFieldDef = [&]() {
1182 uint32_t TypeCode = readVaruint32((Ctx));
1183 /* Discard StorageType */ parseValType(Ctx, TypeCode);
1184 /* Discard Mutability */ readVaruint32(Ctx);
1185 };
1186
1187 uint32_t Count = readVaruint32(Ctx);
1188 Signatures.reserve(Count);
1189 while (Count--) {
1191 uint8_t Form = readUint8(Ctx);
1192 if (Form == wasm::WASM_TYPE_REC) {
1193 // Rec groups expand the type index space (beyond what was declared at
1194 // the top of the section, and also consume one element in that space.
1195 uint32_t RecSize = readVaruint32(Ctx);
1196 if (RecSize == 0)
1197 return make_error<GenericBinaryError>("Rec group size cannot be 0",
1199 Signatures.reserve(Signatures.size() + RecSize);
1200 Count += RecSize;
1202 Signatures.push_back(std::move(Sig));
1203 HasUnmodeledTypes = true;
1204 continue;
1205 }
1206 if (Form != wasm::WASM_TYPE_FUNC) {
1207 // Currently LLVM only models function types, and not other composite
1208 // types. Here we parse the type declarations just enough to skip past
1209 // them in the binary.
1211 uint32_t Supers = readVaruint32(Ctx);
1212 if (Supers > 0) {
1213 if (Supers != 1)
1214 return make_error<GenericBinaryError>(
1215 "Invalid number of supertypes", object_error::parse_failed);
1216 /* Discard SuperIndex */ readVaruint32(Ctx);
1217 }
1218 Form = readVaruint32(Ctx);
1219 }
1221 uint32_t FieldCount = readVaruint32(Ctx);
1222 while (FieldCount--) {
1223 parseFieldDef();
1224 }
1225 } else if (Form == wasm::WASM_TYPE_ARRAY) {
1226 parseFieldDef();
1227 } else {
1228 return make_error<GenericBinaryError>("bad form",
1230 }
1232 Signatures.push_back(std::move(Sig));
1233 HasUnmodeledTypes = true;
1234 continue;
1235 }
1236
1237 uint32_t ParamCount = readVaruint32(Ctx);
1238 Sig.Params.reserve(ParamCount);
1239 while (ParamCount--) {
1240 uint32_t ParamType = readUint8(Ctx);
1241 Sig.Params.push_back(parseValType(Ctx, ParamType));
1242 continue;
1243 }
1244 uint32_t ReturnCount = readVaruint32(Ctx);
1245 while (ReturnCount--) {
1247 Sig.Returns.push_back(parseValType(Ctx, ReturnType));
1248 }
1249
1250 Signatures.push_back(std::move(Sig));
1251 }
1252 if (Ctx.Ptr != Ctx.End)
1253 return make_error<GenericBinaryError>("type section ended prematurely",
1255 return Error::success();
1256}
1257
1258Error WasmObjectFile::parseImportSection(ReadContext &Ctx) {
1259 uint32_t Count = readVaruint32(Ctx);
1260 uint32_t NumTypes = Signatures.size();
1261 Imports.reserve(Count);
1262 for (uint32_t I = 0; I < Count; I++) {
1264 Im.Module = readString(Ctx);
1265 Im.Field = readString(Ctx);
1266 Im.Kind = readUint8(Ctx);
1267 switch (Im.Kind) {
1269 NumImportedFunctions++;
1270 Im.SigIndex = readVaruint32(Ctx);
1271 if (Im.SigIndex >= NumTypes)
1272 return make_error<GenericBinaryError>("invalid function type",
1274 break;
1276 NumImportedGlobals++;
1277 Im.Global.Type = readUint8(Ctx);
1278 Im.Global.Mutable = readVaruint1(Ctx);
1279 break;
1281 Im.Memory = readLimits(Ctx);
1283 HasMemory64 = true;
1284 break;
1286 Im.Table = readTableType(Ctx);
1287 NumImportedTables++;
1288 auto ElemType = Im.Table.ElemType;
1289 if (ElemType != wasm::ValType::FUNCREF &&
1290 ElemType != wasm::ValType::EXTERNREF &&
1291 ElemType != wasm::ValType::OTHERREF)
1292 return make_error<GenericBinaryError>("invalid table element type",
1294 break;
1295 }
1297 NumImportedTags++;
1298 if (readUint8(Ctx) != 0) // Reserved 'attribute' field
1299 return make_error<GenericBinaryError>("invalid attribute",
1301 Im.SigIndex = readVaruint32(Ctx);
1302 if (Im.SigIndex >= NumTypes)
1303 return make_error<GenericBinaryError>("invalid tag type",
1305 break;
1306 default:
1307 return make_error<GenericBinaryError>("unexpected import kind",
1309 }
1310 Imports.push_back(Im);
1311 }
1312 if (Ctx.Ptr != Ctx.End)
1313 return make_error<GenericBinaryError>("import section ended prematurely",
1315 return Error::success();
1316}
1317
1318Error WasmObjectFile::parseFunctionSection(ReadContext &Ctx) {
1319 uint32_t Count = readVaruint32(Ctx);
1320 Functions.reserve(Count);
1321 uint32_t NumTypes = Signatures.size();
1322 while (Count--) {
1324 if (Type >= NumTypes)
1325 return make_error<GenericBinaryError>("invalid function type",
1328 F.SigIndex = Type;
1329 Functions.push_back(F);
1330 }
1331 if (Ctx.Ptr != Ctx.End)
1332 return make_error<GenericBinaryError>("function section ended prematurely",
1334 return Error::success();
1335}
1336
1337Error WasmObjectFile::parseTableSection(ReadContext &Ctx) {
1338 TableSection = Sections.size();
1339 uint32_t Count = readVaruint32(Ctx);
1340 Tables.reserve(Count);
1341 while (Count--) {
1343 T.Type = readTableType(Ctx);
1344 T.Index = NumImportedTables + Tables.size();
1345 Tables.push_back(T);
1346 auto ElemType = Tables.back().Type.ElemType;
1347 if (ElemType != wasm::ValType::FUNCREF &&
1348 ElemType != wasm::ValType::EXTERNREF &&
1349 ElemType != wasm::ValType::OTHERREF) {
1350 return make_error<GenericBinaryError>("invalid table element type",
1352 }
1353 }
1354 if (Ctx.Ptr != Ctx.End)
1355 return make_error<GenericBinaryError>("table section ended prematurely",
1357 return Error::success();
1358}
1359
1360Error WasmObjectFile::parseMemorySection(ReadContext &Ctx) {
1361 uint32_t Count = readVaruint32(Ctx);
1362 Memories.reserve(Count);
1363 while (Count--) {
1364 auto Limits = readLimits(Ctx);
1365 if (Limits.Flags & wasm::WASM_LIMITS_FLAG_IS_64)
1366 HasMemory64 = true;
1367 Memories.push_back(Limits);
1368 }
1369 if (Ctx.Ptr != Ctx.End)
1370 return make_error<GenericBinaryError>("memory section ended prematurely",
1372 return Error::success();
1373}
1374
1375Error WasmObjectFile::parseTagSection(ReadContext &Ctx) {
1376 TagSection = Sections.size();
1377 uint32_t Count = readVaruint32(Ctx);
1378 Tags.reserve(Count);
1379 uint32_t NumTypes = Signatures.size();
1380 while (Count--) {
1381 if (readUint8(Ctx) != 0) // Reserved 'attribute' field
1382 return make_error<GenericBinaryError>("invalid attribute",
1385 if (Type >= NumTypes)
1386 return make_error<GenericBinaryError>("invalid tag type",
1389 Tag.Index = NumImportedTags + Tags.size();
1390 Tag.SigIndex = Type;
1391 Signatures[Type].Kind = wasm::WasmSignature::Tag;
1392 Tags.push_back(Tag);
1393 }
1394
1395 if (Ctx.Ptr != Ctx.End)
1396 return make_error<GenericBinaryError>("tag section ended prematurely",
1398 return Error::success();
1399}
1400
1401Error WasmObjectFile::parseGlobalSection(ReadContext &Ctx) {
1402 GlobalSection = Sections.size();
1403 const uint8_t *SectionStart = Ctx.Ptr;
1404 uint32_t Count = readVaruint32(Ctx);
1405 Globals.reserve(Count);
1406 while (Count--) {
1408 Global.Index = NumImportedGlobals + Globals.size();
1409 const uint8_t *GlobalStart = Ctx.Ptr;
1410 Global.Offset = static_cast<uint32_t>(GlobalStart - SectionStart);
1411 auto GlobalOpcode = readVaruint32(Ctx);
1412 Global.Type.Type = (uint8_t)parseValType(Ctx, GlobalOpcode);
1413 Global.Type.Mutable = readVaruint1(Ctx);
1414 if (Error Err = readInitExpr(Global.InitExpr, Ctx))
1415 return Err;
1416 Global.Size = static_cast<uint32_t>(Ctx.Ptr - GlobalStart);
1417 Globals.push_back(Global);
1418 }
1419 if (Ctx.Ptr != Ctx.End)
1420 return make_error<GenericBinaryError>("global section ended prematurely",
1422 return Error::success();
1423}
1424
1425Error WasmObjectFile::parseExportSection(ReadContext &Ctx) {
1426 uint32_t Count = readVaruint32(Ctx);
1427 Exports.reserve(Count);
1428 Symbols.reserve(Count);
1429 for (uint32_t I = 0; I < Count; I++) {
1431 Ex.Name = readString(Ctx);
1432 Ex.Kind = readUint8(Ctx);
1433 Ex.Index = readVaruint32(Ctx);
1434 const wasm::WasmSignature *Signature = nullptr;
1435 const wasm::WasmGlobalType *GlobalType = nullptr;
1436 const wasm::WasmTableType *TableType = nullptr;
1438 Info.Name = Ex.Name;
1439 Info.Flags = 0;
1440 switch (Ex.Kind) {
1442 if (!isDefinedFunctionIndex(Ex.Index))
1443 return make_error<GenericBinaryError>("invalid function export",
1445 getDefinedFunction(Ex.Index).ExportName = Ex.Name;
1447 Info.ElementIndex = Ex.Index;
1448 unsigned FuncIndex = Info.ElementIndex - NumImportedFunctions;
1449 wasm::WasmFunction &Function = Functions[FuncIndex];
1450 Signature = &Signatures[Function.SigIndex];
1451 break;
1452 }
1454 if (!isValidGlobalIndex(Ex.Index))
1455 return make_error<GenericBinaryError>("invalid global export",
1458 uint64_t Offset = 0;
1459 if (isDefinedGlobalIndex(Ex.Index)) {
1460 auto Global = getDefinedGlobal(Ex.Index);
1461 if (!Global.InitExpr.Extended) {
1462 auto Inst = Global.InitExpr.Inst;
1463 if (Inst.Opcode == wasm::WASM_OPCODE_I32_CONST) {
1464 Offset = Inst.Value.Int32;
1465 } else if (Inst.Opcode == wasm::WASM_OPCODE_I64_CONST) {
1466 Offset = Inst.Value.Int64;
1467 }
1468 }
1469 }
1470 Info.DataRef = wasm::WasmDataReference{0, Offset, 0};
1471 break;
1472 }
1474 if (!isValidTagIndex(Ex.Index))
1475 return make_error<GenericBinaryError>("invalid tag export",
1478 Info.ElementIndex = Ex.Index;
1479 break;
1481 break;
1484 Info.ElementIndex = Ex.Index;
1485 break;
1486 default:
1487 return make_error<GenericBinaryError>("unexpected export kind",
1489 }
1490 Exports.push_back(Ex);
1491 if (Ex.Kind != wasm::WASM_EXTERNAL_MEMORY) {
1492 Symbols.emplace_back(Info, GlobalType, TableType, Signature);
1493 LLVM_DEBUG(dbgs() << "Adding symbol: " << Symbols.back() << "\n");
1494 }
1495 }
1496 if (Ctx.Ptr != Ctx.End)
1497 return make_error<GenericBinaryError>("export section ended prematurely",
1499 return Error::success();
1500}
1501
1502bool WasmObjectFile::isValidFunctionIndex(uint32_t Index) const {
1503 return Index < NumImportedFunctions + Functions.size();
1504}
1505
1506bool WasmObjectFile::isDefinedFunctionIndex(uint32_t Index) const {
1507 return Index >= NumImportedFunctions && isValidFunctionIndex(Index);
1508}
1509
1510bool WasmObjectFile::isValidGlobalIndex(uint32_t Index) const {
1511 return Index < NumImportedGlobals + Globals.size();
1512}
1513
1514bool WasmObjectFile::isValidTableNumber(uint32_t Index) const {
1515 return Index < NumImportedTables + Tables.size();
1516}
1517
1518bool WasmObjectFile::isDefinedGlobalIndex(uint32_t Index) const {
1519 return Index >= NumImportedGlobals && isValidGlobalIndex(Index);
1520}
1521
1522bool WasmObjectFile::isDefinedTableNumber(uint32_t Index) const {
1523 return Index >= NumImportedTables && isValidTableNumber(Index);
1524}
1525
1526bool WasmObjectFile::isValidTagIndex(uint32_t Index) const {
1527 return Index < NumImportedTags + Tags.size();
1528}
1529
1530bool WasmObjectFile::isDefinedTagIndex(uint32_t Index) const {
1531 return Index >= NumImportedTags && isValidTagIndex(Index);
1532}
1533
1534bool WasmObjectFile::isValidFunctionSymbol(uint32_t Index) const {
1535 return Index < Symbols.size() && Symbols[Index].isTypeFunction();
1536}
1537
1538bool WasmObjectFile::isValidTableSymbol(uint32_t Index) const {
1539 return Index < Symbols.size() && Symbols[Index].isTypeTable();
1540}
1541
1542bool WasmObjectFile::isValidGlobalSymbol(uint32_t Index) const {
1543 return Index < Symbols.size() && Symbols[Index].isTypeGlobal();
1544}
1545
1546bool WasmObjectFile::isValidTagSymbol(uint32_t Index) const {
1547 return Index < Symbols.size() && Symbols[Index].isTypeTag();
1548}
1549
1550bool WasmObjectFile::isValidDataSymbol(uint32_t Index) const {
1551 return Index < Symbols.size() && Symbols[Index].isTypeData();
1552}
1553
1554bool WasmObjectFile::isValidSectionSymbol(uint32_t Index) const {
1555 return Index < Symbols.size() && Symbols[Index].isTypeSection();
1556}
1557
1558wasm::WasmFunction &WasmObjectFile::getDefinedFunction(uint32_t Index) {
1559 assert(isDefinedFunctionIndex(Index));
1560 return Functions[Index - NumImportedFunctions];
1561}
1562
1563const wasm::WasmFunction &
1564WasmObjectFile::getDefinedFunction(uint32_t Index) const {
1565 assert(isDefinedFunctionIndex(Index));
1566 return Functions[Index - NumImportedFunctions];
1567}
1568
1569const wasm::WasmGlobal &WasmObjectFile::getDefinedGlobal(uint32_t Index) const {
1570 assert(isDefinedGlobalIndex(Index));
1571 return Globals[Index - NumImportedGlobals];
1572}
1573
1574wasm::WasmTag &WasmObjectFile::getDefinedTag(uint32_t Index) {
1575 assert(isDefinedTagIndex(Index));
1576 return Tags[Index - NumImportedTags];
1577}
1578
1579Error WasmObjectFile::parseStartSection(ReadContext &Ctx) {
1580 StartFunction = readVaruint32(Ctx);
1581 if (!isValidFunctionIndex(StartFunction))
1582 return make_error<GenericBinaryError>("invalid start function",
1584 return Error::success();
1585}
1586
1587Error WasmObjectFile::parseCodeSection(ReadContext &Ctx) {
1588 CodeSection = Sections.size();
1589 uint32_t FunctionCount = readVaruint32(Ctx);
1590 if (FunctionCount != Functions.size()) {
1591 return make_error<GenericBinaryError>("invalid function count",
1593 }
1594
1595 for (uint32_t i = 0; i < FunctionCount; i++) {
1596 wasm::WasmFunction& Function = Functions[i];
1597 const uint8_t *FunctionStart = Ctx.Ptr;
1599 const uint8_t *FunctionEnd = Ctx.Ptr + Size;
1600
1601 Function.CodeOffset = Ctx.Ptr - FunctionStart;
1602 Function.Index = NumImportedFunctions + i;
1603 Function.CodeSectionOffset = FunctionStart - Ctx.Start;
1604 Function.Size = FunctionEnd - FunctionStart;
1605
1606 uint32_t NumLocalDecls = readVaruint32(Ctx);
1607 Function.Locals.reserve(NumLocalDecls);
1608 while (NumLocalDecls--) {
1610 Decl.Count = readVaruint32(Ctx);
1611 Decl.Type = readUint8(Ctx);
1612 Function.Locals.push_back(Decl);
1613 }
1614
1615 uint32_t BodySize = FunctionEnd - Ctx.Ptr;
1616 // Ensure that Function is within Ctx's buffer.
1617 if (Ctx.Ptr + BodySize > Ctx.End) {
1618 return make_error<GenericBinaryError>("Function extends beyond buffer",
1620 }
1621 Function.Body = ArrayRef<uint8_t>(Ctx.Ptr, BodySize);
1622 // This will be set later when reading in the linking metadata section.
1623 Function.Comdat = UINT32_MAX;
1624 Ctx.Ptr += BodySize;
1625 assert(Ctx.Ptr == FunctionEnd);
1626 }
1627 if (Ctx.Ptr != Ctx.End)
1628 return make_error<GenericBinaryError>("code section ended prematurely",
1630 return Error::success();
1631}
1632
1633Error WasmObjectFile::parseElemSection(ReadContext &Ctx) {
1634 uint32_t Count = readVaruint32(Ctx);
1635 ElemSegments.reserve(Count);
1636 while (Count--) {
1637 wasm::WasmElemSegment Segment;
1638 Segment.Flags = readVaruint32(Ctx);
1639
1643 if (Segment.Flags & ~SupportedFlags)
1644 return make_error<GenericBinaryError>(
1645 "Unsupported flags for element segment", object_error::parse_failed);
1646
1647 bool IsPassive = (Segment.Flags & wasm::WASM_ELEM_SEGMENT_IS_PASSIVE) != 0;
1648 bool IsDeclarative =
1649 IsPassive && (Segment.Flags & wasm::WASM_ELEM_SEGMENT_IS_DECLARATIVE);
1650 bool HasTableNumber =
1651 !IsPassive &&
1653 bool HasInitExprs =
1655 bool HasElemKind =
1657 !HasInitExprs;
1658
1659 if (HasTableNumber)
1660 Segment.TableNumber = readVaruint32(Ctx);
1661 else
1662 Segment.TableNumber = 0;
1663
1664 if (!isValidTableNumber(Segment.TableNumber))
1665 return make_error<GenericBinaryError>("invalid TableNumber",
1667
1668 if (IsPassive || IsDeclarative) {
1669 Segment.Offset.Extended = false;
1671 Segment.Offset.Inst.Value.Int32 = 0;
1672 } else {
1673 if (Error Err = readInitExpr(Segment.Offset, Ctx))
1674 return Err;
1675 }
1676
1677 if (HasElemKind) {
1678 auto ElemKind = readVaruint32(Ctx);
1680 Segment.ElemKind = parseValType(Ctx, ElemKind);
1681 if (Segment.ElemKind != wasm::ValType::FUNCREF &&
1683 Segment.ElemKind != wasm::ValType::OTHERREF) {
1684 return make_error<GenericBinaryError>("invalid elem type",
1686 }
1687 } else {
1688 if (ElemKind != 0)
1689 return make_error<GenericBinaryError>("invalid elem type",
1692 }
1693 } else if (HasInitExprs) {
1694 auto ElemType = parseValType(Ctx, readVaruint32(Ctx));
1695 Segment.ElemKind = ElemType;
1696 } else {
1698 }
1699
1700 uint32_t NumElems = readVaruint32(Ctx);
1701
1702 if (HasInitExprs) {
1703 while (NumElems--) {
1704 wasm::WasmInitExpr Expr;
1705 if (Error Err = readInitExpr(Expr, Ctx))
1706 return Err;
1707 }
1708 } else {
1709 while (NumElems--) {
1710 Segment.Functions.push_back(readVaruint32(Ctx));
1711 }
1712 }
1713 ElemSegments.push_back(Segment);
1714 }
1715 if (Ctx.Ptr != Ctx.End)
1716 return make_error<GenericBinaryError>("elem section ended prematurely",
1718 return Error::success();
1719}
1720
1721Error WasmObjectFile::parseDataSection(ReadContext &Ctx) {
1722 DataSection = Sections.size();
1723 uint32_t Count = readVaruint32(Ctx);
1724 if (DataCount && Count != *DataCount)
1725 return make_error<GenericBinaryError>(
1726 "number of data segments does not match DataCount section");
1727 DataSegments.reserve(Count);
1728 while (Count--) {
1729 WasmSegment Segment;
1730 Segment.Data.InitFlags = readVaruint32(Ctx);
1731 Segment.Data.MemoryIndex =
1733 ? readVaruint32(Ctx)
1734 : 0;
1735 if ((Segment.Data.InitFlags & wasm::WASM_DATA_SEGMENT_IS_PASSIVE) == 0) {
1736 if (Error Err = readInitExpr(Segment.Data.Offset, Ctx))
1737 return Err;
1738 } else {
1739 Segment.Data.Offset.Extended = false;
1741 Segment.Data.Offset.Inst.Value.Int32 = 0;
1742 }
1744 if (Size > (size_t)(Ctx.End - Ctx.Ptr))
1745 return make_error<GenericBinaryError>("invalid segment size",
1747 Segment.Data.Content = ArrayRef<uint8_t>(Ctx.Ptr, Size);
1748 // The rest of these Data fields are set later, when reading in the linking
1749 // metadata section.
1750 Segment.Data.Alignment = 0;
1751 Segment.Data.LinkingFlags = 0;
1752 Segment.Data.Comdat = UINT32_MAX;
1753 Segment.SectionOffset = Ctx.Ptr - Ctx.Start;
1754 Ctx.Ptr += Size;
1755 DataSegments.push_back(Segment);
1756 }
1757 if (Ctx.Ptr != Ctx.End)
1758 return make_error<GenericBinaryError>("data section ended prematurely",
1760 return Error::success();
1761}
1762
1763Error WasmObjectFile::parseDataCountSection(ReadContext &Ctx) {
1764 DataCount = readVaruint32(Ctx);
1765 return Error::success();
1766}
1767
1769 return Header;
1770}
1771
1772void WasmObjectFile::moveSymbolNext(DataRefImpl &Symb) const { Symb.d.b++; }
1773
1776 const WasmSymbol &Sym = getWasmSymbol(Symb);
1777
1778 LLVM_DEBUG(dbgs() << "getSymbolFlags: ptr=" << &Sym << " " << Sym << "\n");
1779 if (Sym.isBindingWeak())
1780 Result |= SymbolRef::SF_Weak;
1781 if (!Sym.isBindingLocal())
1782 Result |= SymbolRef::SF_Global;
1783 if (Sym.isHidden())
1784 Result |= SymbolRef::SF_Hidden;
1785 if (!Sym.isDefined())
1786 Result |= SymbolRef::SF_Undefined;
1787 if (Sym.isTypeFunction())
1788 Result |= SymbolRef::SF_Executable;
1789 return Result;
1790}
1791
1794 Ref.d.a = 1; // Arbitrary non-zero value so that Ref.p is non-null
1795 Ref.d.b = 0; // Symbol index
1796 return BasicSymbolRef(Ref, this);
1797}
1798
1801 Ref.d.a = 1; // Arbitrary non-zero value so that Ref.p is non-null
1802 Ref.d.b = Symbols.size(); // Symbol index
1803 return BasicSymbolRef(Ref, this);
1804}
1805
1807 return Symbols[Symb.d.b];
1808}
1809
1811 return getWasmSymbol(Symb.getRawDataRefImpl());
1812}
1813
1815 return getWasmSymbol(Symb).Info.Name;
1816}
1817
1819 auto &Sym = getWasmSymbol(Symb);
1820 if (!Sym.isDefined())
1821 return 0;
1823 if (!Sec)
1824 return Sec.takeError();
1825 uint32_t SectionAddress = getSectionAddress(Sec.get()->getRawDataRefImpl());
1826 if (Sym.Info.Kind == wasm::WASM_SYMBOL_TYPE_FUNCTION &&
1827 isDefinedFunctionIndex(Sym.Info.ElementIndex)) {
1828 return getDefinedFunction(Sym.Info.ElementIndex).CodeSectionOffset +
1829 SectionAddress;
1830 }
1831 if (Sym.Info.Kind == wasm::WASM_SYMBOL_TYPE_GLOBAL &&
1832 isDefinedGlobalIndex(Sym.Info.ElementIndex)) {
1833 return getDefinedGlobal(Sym.Info.ElementIndex).Offset + SectionAddress;
1834 }
1835
1836 return getSymbolValue(Symb);
1837}
1838
1840 switch (Sym.Info.Kind) {
1845 return Sym.Info.ElementIndex;
1847 // The value of a data symbol is the segment offset, plus the symbol
1848 // offset within the segment.
1849 uint32_t SegmentIndex = Sym.Info.DataRef.Segment;
1850 const wasm::WasmDataSegment &Segment = DataSegments[SegmentIndex].Data;
1851 if (Segment.Offset.Extended) {
1852 llvm_unreachable("extended init exprs not supported");
1853 } else if (Segment.Offset.Inst.Opcode == wasm::WASM_OPCODE_I32_CONST) {
1854 return Segment.Offset.Inst.Value.Int32 + Sym.Info.DataRef.Offset;
1855 } else if (Segment.Offset.Inst.Opcode == wasm::WASM_OPCODE_I64_CONST) {
1856 return Segment.Offset.Inst.Value.Int64 + Sym.Info.DataRef.Offset;
1857 } else if (Segment.Offset.Inst.Opcode == wasm::WASM_OPCODE_GLOBAL_GET) {
1858 return Sym.Info.DataRef.Offset;
1859 } else {
1860 llvm_unreachable("unknown init expr opcode");
1861 }
1862 }
1864 return 0;
1865 }
1866 llvm_unreachable("invalid symbol type");
1867}
1868
1870 return getWasmSymbolValue(getWasmSymbol(Symb));
1871}
1872
1874 llvm_unreachable("not yet implemented");
1875 return 0;
1876}
1877
1879 llvm_unreachable("not yet implemented");
1880 return 0;
1881}
1882
1885 const WasmSymbol &Sym = getWasmSymbol(Symb);
1886
1887 switch (Sym.Info.Kind) {
1891 return SymbolRef::ST_Other;
1893 return SymbolRef::ST_Data;
1895 return SymbolRef::ST_Debug;
1897 return SymbolRef::ST_Other;
1899 return SymbolRef::ST_Other;
1900 }
1901
1902 llvm_unreachable("unknown WasmSymbol::SymbolType");
1903 return SymbolRef::ST_Other;
1904}
1905
1908 const WasmSymbol &Sym = getWasmSymbol(Symb);
1909 if (Sym.isUndefined())
1910 return section_end();
1911
1913 Ref.d.a = getSymbolSectionIdImpl(Sym);
1914 return section_iterator(SectionRef(Ref, this));
1915}
1916
1918 const WasmSymbol &Sym = getWasmSymbol(Symb);
1919 return getSymbolSectionIdImpl(Sym);
1920}
1921
1922uint32_t WasmObjectFile::getSymbolSectionIdImpl(const WasmSymbol &Sym) const {
1923 switch (Sym.Info.Kind) {
1925 return CodeSection;
1927 return GlobalSection;
1929 return DataSection;
1931 return Sym.Info.ElementIndex;
1933 return TagSection;
1935 return TableSection;
1936 default:
1937 llvm_unreachable("unknown WasmSymbol::SymbolType");
1938 }
1939}
1940
1942 const WasmSymbol &Sym = getWasmSymbol(Symb);
1943 if (!Sym.isDefined())
1944 return 0;
1945 if (Sym.isTypeGlobal())
1946 return getDefinedGlobal(Sym.Info.ElementIndex).Size;
1947 if (Sym.isTypeData())
1948 return Sym.Info.DataRef.Size;
1949 if (Sym.isTypeFunction())
1950 return functions()[Sym.Info.ElementIndex - getNumImportedFunctions()].Size;
1951 // Currently symbol size is only tracked for data segments and functions. In
1952 // principle we could also track size (e.g. binary size) for tables, globals
1953 // and element segments etc too.
1954 return 0;
1955}
1956
1958
1960 const WasmSection &S = Sections[Sec.d.a];
1961 if (S.Type == wasm::WASM_SEC_CUSTOM)
1962 return S.Name;
1966}
1967
1969 // For object files, use 0 for section addresses, and section offsets for
1970 // symbol addresses. For linked files, use file offsets.
1971 // See also getSymbolAddress.
1972 return isRelocatableObject() || isSharedObject() ? 0
1973 : Sections[Sec.d.a].Offset;
1974}
1975
1977 return Sec.d.a;
1978}
1979
1981 const WasmSection &S = Sections[Sec.d.a];
1982 return S.Content.size();
1983}
1984
1987 const WasmSection &S = Sections[Sec.d.a];
1988 // This will never fail since wasm sections can never be empty (user-sections
1989 // must have a name and non-user sections each have a defined structure).
1990 return S.Content;
1991}
1992
1994 return 1;
1995}
1996
1998 return false;
1999}
2000
2003}
2004
2007}
2008
2009bool WasmObjectFile::isSectionBSS(DataRefImpl Sec) const { return false; }
2010
2011bool WasmObjectFile::isSectionVirtual(DataRefImpl Sec) const { return false; }
2012
2014 DataRefImpl RelocRef;
2015 RelocRef.d.a = Ref.d.a;
2016 RelocRef.d.b = 0;
2017 return relocation_iterator(RelocationRef(RelocRef, this));
2018}
2019
2021 const WasmSection &Sec = getWasmSection(Ref);
2022 DataRefImpl RelocRef;
2023 RelocRef.d.a = Ref.d.a;
2024 RelocRef.d.b = Sec.Relocations.size();
2025 return relocation_iterator(RelocationRef(RelocRef, this));
2026}
2027
2029
2032 return Rel.Offset;
2033}
2034
2037 if (Rel.Type == wasm::R_WASM_TYPE_INDEX_LEB)
2038 return symbol_end();
2040 Sym.d.a = 1;
2041 Sym.d.b = Rel.Index;
2042 return symbol_iterator(SymbolRef(Sym, this));
2043}
2044
2047 return Rel.Type;
2048}
2049
2051 DataRefImpl Ref, SmallVectorImpl<char> &Result) const {
2053 StringRef Res = "Unknown";
2054
2055#define WASM_RELOC(name, value) \
2056 case wasm::name: \
2057 Res = #name; \
2058 break;
2059
2060 switch (Rel.Type) {
2061#include "llvm/BinaryFormat/WasmRelocs.def"
2062 }
2063
2064#undef WASM_RELOC
2065
2066 Result.append(Res.begin(), Res.end());
2067}
2068
2071 Ref.d.a = 0;
2072 return section_iterator(SectionRef(Ref, this));
2073}
2074
2077 Ref.d.a = Sections.size();
2078 return section_iterator(SectionRef(Ref, this));
2079}
2080
2082 return HasMemory64 ? 8 : 4;
2083}
2084
2086
2088 return HasMemory64 ? Triple::wasm64 : Triple::wasm32;
2089}
2090
2092 return SubtargetFeatures();
2093}
2094
2095bool WasmObjectFile::isRelocatableObject() const { return HasLinkingSection; }
2096
2097bool WasmObjectFile::isSharedObject() const { return HasDylinkSection; }
2098
2100 assert(Ref.d.a < Sections.size());
2101 return Sections[Ref.d.a];
2102}
2103
2104const WasmSection &
2106 return getWasmSection(Section.getRawDataRefImpl());
2107}
2108
2111 return getWasmRelocation(Ref.getRawDataRefImpl());
2112}
2113
2116 assert(Ref.d.a < Sections.size());
2117 const WasmSection &Sec = Sections[Ref.d.a];
2118 assert(Ref.d.b < Sec.Relocations.size());
2119 return Sec.Relocations[Ref.d.b];
2120}
2121
2122int WasmSectionOrderChecker::getSectionOrder(unsigned ID,
2123 StringRef CustomSectionName) {
2124 switch (ID) {
2126 return StringSwitch<unsigned>(CustomSectionName)
2127 .Case("dylink", WASM_SEC_ORDER_DYLINK)
2128 .Case("dylink.0", WASM_SEC_ORDER_DYLINK)
2129 .Case("linking", WASM_SEC_ORDER_LINKING)
2131 .Case("name", WASM_SEC_ORDER_NAME)
2132 .Case("producers", WASM_SEC_ORDER_PRODUCERS)
2133 .Case("target_features", WASM_SEC_ORDER_TARGET_FEATURES)
2136 return WASM_SEC_ORDER_TYPE;
2138 return WASM_SEC_ORDER_IMPORT;
2142 return WASM_SEC_ORDER_TABLE;
2144 return WASM_SEC_ORDER_MEMORY;
2146 return WASM_SEC_ORDER_GLOBAL;
2148 return WASM_SEC_ORDER_EXPORT;
2150 return WASM_SEC_ORDER_START;
2152 return WASM_SEC_ORDER_ELEM;
2154 return WASM_SEC_ORDER_CODE;
2156 return WASM_SEC_ORDER_DATA;
2159 case wasm::WASM_SEC_TAG:
2160 return WASM_SEC_ORDER_TAG;
2161 default:
2162 return WASM_SEC_ORDER_NONE;
2163 }
2164}
2165
2166// Represents the edges in a directed graph where any node B reachable from node
2167// A is not allowed to appear before A in the section ordering, but may appear
2168// afterward.
2170 [WASM_NUM_SEC_ORDERS][WASM_NUM_SEC_ORDERS] = {
2171 // WASM_SEC_ORDER_NONE
2172 {},
2173 // WASM_SEC_ORDER_TYPE
2174 {WASM_SEC_ORDER_TYPE, WASM_SEC_ORDER_IMPORT},
2175 // WASM_SEC_ORDER_IMPORT
2176 {WASM_SEC_ORDER_IMPORT, WASM_SEC_ORDER_FUNCTION},
2177 // WASM_SEC_ORDER_FUNCTION
2178 {WASM_SEC_ORDER_FUNCTION, WASM_SEC_ORDER_TABLE},
2179 // WASM_SEC_ORDER_TABLE
2180 {WASM_SEC_ORDER_TABLE, WASM_SEC_ORDER_MEMORY},
2181 // WASM_SEC_ORDER_MEMORY
2182 {WASM_SEC_ORDER_MEMORY, WASM_SEC_ORDER_TAG},
2183 // WASM_SEC_ORDER_TAG
2184 {WASM_SEC_ORDER_TAG, WASM_SEC_ORDER_GLOBAL},
2185 // WASM_SEC_ORDER_GLOBAL
2186 {WASM_SEC_ORDER_GLOBAL, WASM_SEC_ORDER_EXPORT},
2187 // WASM_SEC_ORDER_EXPORT
2188 {WASM_SEC_ORDER_EXPORT, WASM_SEC_ORDER_START},
2189 // WASM_SEC_ORDER_START
2190 {WASM_SEC_ORDER_START, WASM_SEC_ORDER_ELEM},
2191 // WASM_SEC_ORDER_ELEM
2192 {WASM_SEC_ORDER_ELEM, WASM_SEC_ORDER_DATACOUNT},
2193 // WASM_SEC_ORDER_DATACOUNT
2194 {WASM_SEC_ORDER_DATACOUNT, WASM_SEC_ORDER_CODE},
2195 // WASM_SEC_ORDER_CODE
2196 {WASM_SEC_ORDER_CODE, WASM_SEC_ORDER_DATA},
2197 // WASM_SEC_ORDER_DATA
2198 {WASM_SEC_ORDER_DATA, WASM_SEC_ORDER_LINKING},
2199
2200 // Custom Sections
2201 // WASM_SEC_ORDER_DYLINK
2202 {WASM_SEC_ORDER_DYLINK, WASM_SEC_ORDER_TYPE},
2203 // WASM_SEC_ORDER_LINKING
2204 {WASM_SEC_ORDER_LINKING, WASM_SEC_ORDER_RELOC, WASM_SEC_ORDER_NAME},
2205 // WASM_SEC_ORDER_RELOC (can be repeated)
2206 {},
2207 // WASM_SEC_ORDER_NAME
2208 {WASM_SEC_ORDER_NAME, WASM_SEC_ORDER_PRODUCERS},
2209 // WASM_SEC_ORDER_PRODUCERS
2210 {WASM_SEC_ORDER_PRODUCERS, WASM_SEC_ORDER_TARGET_FEATURES},
2211 // WASM_SEC_ORDER_TARGET_FEATURES
2212 {WASM_SEC_ORDER_TARGET_FEATURES}};
2213
2215 StringRef CustomSectionName) {
2216 int Order = getSectionOrder(ID, CustomSectionName);
2217 if (Order == WASM_SEC_ORDER_NONE)
2218 return true;
2219
2220 // Disallowed predecessors we need to check for
2222
2223 // Keep track of completed checks to avoid repeating work
2224 bool Checked[WASM_NUM_SEC_ORDERS] = {};
2225
2226 int Curr = Order;
2227 while (true) {
2228 // Add new disallowed predecessors to work list
2229 for (size_t I = 0;; ++I) {
2230 int Next = DisallowedPredecessors[Curr][I];
2231 if (Next == WASM_SEC_ORDER_NONE)
2232 break;
2233 if (Checked[Next])
2234 continue;
2235 WorkList.push_back(Next);
2236 Checked[Next] = true;
2237 }
2238
2239 if (WorkList.empty())
2240 break;
2241
2242 // Consider next disallowed predecessor
2243 Curr = WorkList.pop_back_val();
2244 if (Seen[Curr])
2245 return false;
2246 }
2247
2248 // Have not seen any disallowed predecessors
2249 Seen[Order] = true;
2250 return true;
2251}
Analysis containing CSE Info
Definition: CSEInfo.cpp:27
#define LLVM_DUMP_METHOD
Mark debug helper function definitions like dump() that should not be stripped from debug builds.
Definition: Compiler.h:529
#define LLVM_DEBUG(X)
Definition: Debug.h:101
This file defines the DenseSet and SmallDenseSet classes.
std::string Name
uint64_t Size
Symbol * Sym
Definition: ELF_riscv.cpp:479
#define F(x, y, z)
Definition: MD5.cpp:55
#define I(x, y, z)
Definition: MD5.cpp:58
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
This file defines the SmallSet class.
StringSet - A set-like wrapper for the StringMap.
This file implements the StringSwitch template, which mimics a switch() statement whose cases are str...
static uint8_t readVaruint1(WasmObjectFile::ReadContext &Ctx)
static Error readInitExpr(wasm::WasmInitExpr &Expr, WasmObjectFile::ReadContext &Ctx)
static int32_t readVarint32(WasmObjectFile::ReadContext &Ctx)
static wasm::WasmTableType readTableType(WasmObjectFile::ReadContext &Ctx)
static wasm::WasmLimits readLimits(WasmObjectFile::ReadContext &Ctx)
static uint64_t readVaruint64(WasmObjectFile::ReadContext &Ctx)
static Error readSection(WasmSection &Section, WasmObjectFile::ReadContext &Ctx, WasmSectionOrderChecker &Checker)
static int64_t readLEB128(WasmObjectFile::ReadContext &Ctx)
static uint32_t readVaruint32(WasmObjectFile::ReadContext &Ctx)
static uint32_t readUint32(WasmObjectFile::ReadContext &Ctx)
static uint8_t readOpcode(WasmObjectFile::ReadContext &Ctx)
static StringRef readString(WasmObjectFile::ReadContext &Ctx)
static uint8_t readUint8(WasmObjectFile::ReadContext &Ctx)
#define VARUINT1_MAX
static int32_t readFloat32(WasmObjectFile::ReadContext &Ctx)
static uint64_t readULEB128(WasmObjectFile::ReadContext &Ctx)
static int64_t readFloat64(WasmObjectFile::ReadContext &Ctx)
static wasm::ValType parseValType(WasmObjectFile::ReadContext &Ctx, uint32_t Code)
static int64_t readVarint64(WasmObjectFile::ReadContext &Ctx)
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition: ArrayRef.h:41
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:165
const T * data() const
Definition: ArrayRef.h:162
Implements a dense probed hash-table based set.
Definition: DenseSet.h:271
Helper for Errors used as out-parameters.
Definition: Error.h:1102
Lightweight error class with error context and mandatory checking.
Definition: Error.h:160
static ErrorSuccess success()
Create a success value.
Definition: Error.h:334
Tagged union holding either a T or a Error.
Definition: Error.h:474
Error takeError()
Take ownership of the stored error.
Definition: Error.h:601
reference get()
Returns a reference to the stored T value.
Definition: Error.h:571
bool empty() const
Definition: Function.h:801
SmallSet - This maintains a set of unique values, optimizing for the case when the set is small (less...
Definition: SmallSet.h:135
std::pair< const_iterator, bool > insert(const T &V)
insert - Insert an element into the set if it isn't already there.
Definition: SmallSet.h:179
bool empty() const
Definition: SmallVector.h:94
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
Definition: SmallVector.h:586
void reserve(size_type N)
Definition: SmallVector.h:676
void push_back(const T &Elt)
Definition: SmallVector.h:426
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
Definition: SmallVector.h:1209
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
constexpr StringRef substr(size_t Start, size_t N=npos) const
Return a reference to the substring from [Start, Start + N).
Definition: StringRef.h:567
bool starts_with(StringRef Prefix) const
Check if this string starts with the given Prefix.
Definition: StringRef.h:257
constexpr bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:134
iterator begin() const
Definition: StringRef.h:111
constexpr size_t size() const
size - Get the string size.
Definition: StringRef.h:137
iterator end() const
Definition: StringRef.h:113
const unsigned char * bytes_begin() const
Definition: StringRef.h:115
StringSet - A wrapper for StringMap that provides set-like functionality.
Definition: StringSet.h:23
std::pair< typename Base::iterator, bool > insert(StringRef key)
Definition: StringSet.h:38
A switch()-like statement whose cases are string literals.
Definition: StringSwitch.h:44
StringSwitch & Case(StringLiteral S, T Value)
Definition: StringSwitch.h:69
R Default(T Value)
Definition: StringSwitch.h:182
StringSwitch & StartsWith(StringLiteral S, T Value)
Definition: StringSwitch.h:83
Manages the enabling and disabling of subtarget specific features.
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:81
static Twine utohexstr(const uint64_t &Val)
Definition: Twine.h:416
The instances of the Type class are immutable: once they are created, they are never changed.
Definition: Type.h:45
std::pair< iterator, bool > insert(const ValueT &V)
Definition: DenseSet.h:206
This is a value type class that represents a single symbol in the list of symbols in the object file.
Definition: SymbolicFile.h:103
DataRefImpl getRawDataRefImpl() const
Definition: SymbolicFile.h:210
MemoryBufferRef Data
Definition: Binary.h:37
StringRef getData() const
Definition: Binary.cpp:39
This class is the base class for all object file types.
Definition: ObjectFile.h:229
friend class RelocationRef
Definition: ObjectFile.h:287
friend class SymbolRef
Definition: ObjectFile.h:247
friend class SectionRef
Definition: ObjectFile.h:261
static Expected< std::unique_ptr< WasmObjectFile > > createWasmObjectFile(MemoryBufferRef Object)
Expected< uint64_t > getSymbolValue(DataRefImpl Symb) const
Definition: ObjectFile.cpp:56
This is a value type class that represents a single relocation in the list of relocations in the obje...
Definition: ObjectFile.h:52
This is a value type class that represents a single section in the list of sections in the object fil...
Definition: ObjectFile.h:81
This is a value type class that represents a single symbol in the list of symbols in the object file.
Definition: ObjectFile.h:168
basic_symbol_iterator symbol_begin() const override
relocation_iterator section_rel_end(DataRefImpl Sec) const override
void moveSymbolNext(DataRefImpl &Symb) const override
uint64_t getSectionAlignment(DataRefImpl Sec) const override
uint64_t getRelocationOffset(DataRefImpl Rel) const override
Expected< SymbolRef::Type > getSymbolType(DataRefImpl Symb) const override
uint64_t getWasmSymbolValue(const WasmSymbol &Sym) const
uint64_t getSymbolValueImpl(DataRefImpl Symb) const override
bool isSectionText(DataRefImpl Sec) const override
bool isSectionBSS(DataRefImpl Sec) const override
basic_symbol_iterator symbol_end() const override
Expected< uint32_t > getSymbolFlags(DataRefImpl Symb) const override
section_iterator section_begin() const override
bool isRelocatableObject() const override
True if this is a relocatable object (.o/.obj).
void moveRelocationNext(DataRefImpl &Rel) const override
uint32_t getSymbolSectionId(SymbolRef Sym) const
bool isSectionCompressed(DataRefImpl Sec) const override
bool isSectionVirtual(DataRefImpl Sec) const override
uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override
void getRelocationTypeName(DataRefImpl Rel, SmallVectorImpl< char > &Result) const override
StringRef getFileFormatName() const override
Expected< StringRef > getSymbolName(DataRefImpl Symb) const override
relocation_iterator section_rel_begin(DataRefImpl Sec) const override
uint8_t getBytesInAddress() const override
The number of bytes used to represent an address in this object file format.
WasmObjectFile(MemoryBufferRef Object, Error &Err)
section_iterator section_end() const override
Expected< ArrayRef< uint8_t > > getSectionContents(DataRefImpl Sec) const override
uint64_t getSectionIndex(DataRefImpl Sec) const override
uint32_t getSymbolAlignment(DataRefImpl Symb) const override
uint64_t getSectionSize(DataRefImpl Sec) const override
Triple::ArchType getArch() const override
uint64_t getRelocationType(DataRefImpl Rel) const override
const WasmSection & getWasmSection(const SectionRef &Section) const
Expected< section_iterator > getSymbolSection(DataRefImpl Symb) const override
symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override
Expected< SubtargetFeatures > getFeatures() const override
const wasm::WasmObjectHeader & getHeader() const
void moveSectionNext(DataRefImpl &Sec) const override
uint32_t getNumImportedFunctions() const
Definition: Wasm.h:160
const wasm::WasmRelocation & getWasmRelocation(const RelocationRef &Ref) const
uint32_t getSymbolSize(SymbolRef Sym) const
ArrayRef< wasm::WasmFunction > functions() const
Definition: Wasm.h:155
const WasmSymbol & getWasmSymbol(const DataRefImpl &Symb) const
uint64_t getSectionAddress(DataRefImpl Sec) const override
Expected< uint64_t > getSymbolAddress(DataRefImpl Symb) const override
bool isSectionData(DataRefImpl Sec) const override
Expected< StringRef > getSectionName(DataRefImpl Sec) const override
bool isValidSectionOrder(unsigned ID, StringRef CustomSectionName="")
static int DisallowedPredecessors[WASM_NUM_SEC_ORDERS][WASM_NUM_SEC_ORDERS]
Definition: Wasm.h:356
unsigned getBinding() const
Definition: Wasm.h:89
LLVM_DUMP_METHOD void dump() const
bool isTypeData() const
Definition: Wasm.h:59
bool isHidden() const
Definition: Wasm.h:93
wasm::WasmSymbolInfo Info
Definition: Wasm.h:48
void print(raw_ostream &Out) const
bool isDefined() const
Definition: Wasm.h:71
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
const uint64_t Version
Definition: InstrProf.h:1042
std::optional< const char * > toString(const std::optional< DWARFFormValue > &V)
Take an optional DWARFFormValue and try to extract a string value from it.
content_iterator< SectionRef > section_iterator
Definition: ObjectFile.h:47
content_iterator< RelocationRef > relocation_iterator
Definition: ObjectFile.h:77
uint32_t read32le(const void *P)
Definition: Endian.h:409
@ WASM_INIT_FUNCS
Definition: Wasm.h:185
@ WASM_COMDAT_INFO
Definition: Wasm.h:186
@ WASM_SEGMENT_INFO
Definition: Wasm.h:184
@ WASM_SYMBOL_TABLE
Definition: Wasm.h:187
const unsigned WASM_SYMBOL_UNDEFINED
Definition: Wasm.h:235
@ WASM_COMDAT_SECTION
Definition: Wasm.h:203
@ WASM_COMDAT_FUNCTION
Definition: Wasm.h:201
@ WASM_COMDAT_DATA
Definition: Wasm.h:200
@ WASM_FEATURE_PREFIX_USED
Definition: Wasm.h:168
@ WASM_FEATURE_PREFIX_REQUIRED
Definition: Wasm.h:169
@ WASM_FEATURE_PREFIX_DISALLOWED
Definition: Wasm.h:170
@ WASM_DATA_SEGMENT_IS_PASSIVE
Definition: Wasm.h:154
@ WASM_DATA_SEGMENT_HAS_MEMINDEX
Definition: Wasm.h:155
@ WASM_OPCODE_ARRAY_NEW_FIXED
Definition: Wasm.h:122
@ WASM_OPCODE_REF_I31
Definition: Wasm.h:123
@ WASM_OPCODE_ARRAY_NEW_DEFAULT
Definition: Wasm.h:121
@ WASM_OPCODE_STRUCT_NEW
Definition: Wasm.h:118
@ WASM_OPCODE_STRUCT_NEW_DEFAULT
Definition: Wasm.h:119
@ WASM_OPCODE_ARRAY_NEW
Definition: Wasm.h:120
@ WASM_NAMES_LOCAL
Definition: Wasm.h:177
@ WASM_NAMES_DATA_SEGMENT
Definition: Wasm.h:179
@ WASM_NAMES_GLOBAL
Definition: Wasm.h:178
@ WASM_NAMES_FUNCTION
Definition: Wasm.h:176
const unsigned WASM_SYMBOL_BINDING_GLOBAL
Definition: Wasm.h:230
const unsigned WASM_ELEM_SEGMENT_MASK_HAS_ELEM_KIND
Definition: Wasm.h:164
@ WASM_LIMITS_FLAG_HAS_MAX
Definition: Wasm.h:148
@ WASM_LIMITS_FLAG_IS_64
Definition: Wasm.h:150
const uint32_t WasmMetadataVersion
Definition: Wasm.h:30
const unsigned WASM_SYMBOL_BINDING_WEAK
Definition: Wasm.h:231
const unsigned WASM_SYMBOL_BINDING_LOCAL
Definition: Wasm.h:232
WasmSymbolType
Definition: Wasm.h:207
@ WASM_SYMBOL_TYPE_GLOBAL
Definition: Wasm.h:210
@ WASM_SYMBOL_TYPE_DATA
Definition: Wasm.h:209
@ WASM_SYMBOL_TYPE_TAG
Definition: Wasm.h:212
@ WASM_SYMBOL_TYPE_TABLE
Definition: Wasm.h:213
@ WASM_SYMBOL_TYPE_SECTION
Definition: Wasm.h:211
@ WASM_SYMBOL_TYPE_FUNCTION
Definition: Wasm.h:208
const uint32_t WasmVersion
Definition: Wasm.h:28
@ WASM_ELEM_SEGMENT_HAS_INIT_EXPRS
Definition: Wasm.h:162
@ WASM_ELEM_SEGMENT_IS_DECLARATIVE
Definition: Wasm.h:160
@ WASM_ELEM_SEGMENT_HAS_TABLE_NUMBER
Definition: Wasm.h:161
@ WASM_ELEM_SEGMENT_IS_PASSIVE
Definition: Wasm.h:159
@ WASM_SEC_CODE
Definition: Wasm.h:45
@ WASM_SEC_MEMORY
Definition: Wasm.h:40
@ WASM_SEC_IMPORT
Definition: Wasm.h:37
@ WASM_SEC_EXPORT
Definition: Wasm.h:42
@ WASM_SEC_DATACOUNT
Definition: Wasm.h:47
@ WASM_SEC_LAST_KNOWN
Definition: Wasm.h:49
@ WASM_SEC_CUSTOM
Definition: Wasm.h:35
@ WASM_SEC_FUNCTION
Definition: Wasm.h:38
@ WASM_SEC_ELEM
Definition: Wasm.h:44
@ WASM_SEC_START
Definition: Wasm.h:43
@ WASM_SEC_TABLE
Definition: Wasm.h:39
@ WASM_SEC_TYPE
Definition: Wasm.h:36
@ WASM_SEC_TAG
Definition: Wasm.h:48
@ WASM_SEC_GLOBAL
Definition: Wasm.h:41
@ WASM_SEC_DATA
Definition: Wasm.h:46
@ WASM_DYLINK_NEEDED
Definition: Wasm.h:193
@ WASM_DYLINK_MEM_INFO
Definition: Wasm.h:192
@ WASM_DYLINK_EXPORT_INFO
Definition: Wasm.h:194
@ WASM_DYLINK_IMPORT_INFO
Definition: Wasm.h:195
const unsigned WASM_SYMBOL_BINDING_MASK
Definition: Wasm.h:227
NameType
Definition: Wasm.h:461
@ WASM_EXTERNAL_TABLE
Definition: Wasm.h:84
@ WASM_EXTERNAL_FUNCTION
Definition: Wasm.h:83
@ WASM_EXTERNAL_TAG
Definition: Wasm.h:87
@ WASM_EXTERNAL_MEMORY
Definition: Wasm.h:85
@ WASM_EXTERNAL_GLOBAL
Definition: Wasm.h:86
@ WASM_TYPE_ARRAY
Definition: Wasm.h:73
@ WASM_TYPE_NULLABLE
Definition: Wasm.h:71
@ WASM_TYPE_I64
Definition: Wasm.h:55
@ WASM_TYPE_F64
Definition: Wasm.h:57
@ WASM_TYPE_FUNCREF
Definition: Wasm.h:62
@ WASM_TYPE_REC
Definition: Wasm.h:77
@ WASM_TYPE_EXTERNREF
Definition: Wasm.h:63
@ WASM_TYPE_SUB
Definition: Wasm.h:75
@ WASM_TYPE_FUNC
Definition: Wasm.h:72
@ WASM_TYPE_STRUCT
Definition: Wasm.h:74
@ WASM_TYPE_NONNULLABLE
Definition: Wasm.h:70
@ WASM_TYPE_I32
Definition: Wasm.h:54
@ WASM_TYPE_F32
Definition: Wasm.h:56
@ WASM_TYPE_V128
Definition: Wasm.h:58
@ WASM_TYPE_SUB_FINAL
Definition: Wasm.h:76
@ WASM_OPCODE_I64_ADD
Definition: Wasm.h:108
@ WASM_OPCODE_I32_SUB
Definition: Wasm.h:106
@ WASM_OPCODE_F64_CONST
Definition: Wasm.h:104
@ WASM_OPCODE_END
Definition: Wasm.h:92
@ WASM_OPCODE_I64_MUL
Definition: Wasm.h:110
@ WASM_OPCODE_REF_NULL
Definition: Wasm.h:111
@ WASM_OPCODE_GC_PREFIX
Definition: Wasm.h:113
@ WASM_OPCODE_REF_FUNC
Definition: Wasm.h:112
@ WASM_OPCODE_F32_CONST
Definition: Wasm.h:103
@ WASM_OPCODE_GLOBAL_GET
Definition: Wasm.h:97
@ WASM_OPCODE_I64_SUB
Definition: Wasm.h:109
@ WASM_OPCODE_I32_MUL
Definition: Wasm.h:107
@ WASM_OPCODE_I32_ADD
Definition: Wasm.h:105
@ WASM_OPCODE_I64_CONST
Definition: Wasm.h:102
@ WASM_OPCODE_I32_CONST
Definition: Wasm.h:101
llvm::StringRef sectionTypeToString(uint32_t type)
Definition: Wasm.cpp:41
const unsigned WASM_SYMBOL_EXPLICIT_NAME
Definition: Wasm.h:237
const unsigned WASM_SYMBOL_ABSOLUTE
Definition: Wasm.h:240
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
@ Offset
Definition: DWP.cpp:456
std::string to_string(const T &Value)
Definition: ScopedPrinter.h:85
uint64_t decodeULEB128(const uint8_t *p, unsigned *n=nullptr, const uint8_t *end=nullptr, const char **error=nullptr)
Utility function to decode a ULEB128 value.
Definition: LEB128.h:131
@ Import
Import information from summary.
int64_t decodeSLEB128(const uint8_t *p, unsigned *n=nullptr, const uint8_t *end=nullptr, const char **error=nullptr)
Utility function to decode a SLEB128 value.
Definition: LEB128.h:165
Error createStringError(std::error_code EC, char const *Fmt, const Ts &... Vals)
Create formatted StringError object.
Definition: Error.h:1244
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:163
void report_fatal_error(Error Err, bool gen_crash_diag=true)
Report a serious error, calling any installed error handler.
Definition: Error.cpp:156
@ Global
Append to llvm.global_dtors.
@ Ref
The access may reference the value stored in memory.
ArrayRef< uint8_t > Content
Definition: Wasm.h:115
std::vector< wasm::WasmRelocation > Relocations
Definition: Wasm.h:116
wasm::WasmDataSegment Data
Definition: Wasm.h:123
uint32_t SectionOffset
Definition: Wasm.h:122
ArrayRef< uint8_t > Content
Definition: Wasm.h:402
WasmInitExpr Offset
Definition: Wasm.h:400
uint32_t MemoryAlignment
Definition: Wasm.h:282
std::vector< StringRef > Needed
Definition: Wasm.h:285
std::vector< WasmDylinkExportInfo > ExportInfo
Definition: Wasm.h:287
std::vector< WasmDylinkImportInfo > ImportInfo
Definition: Wasm.h:286
uint32_t TableAlignment
Definition: Wasm.h:284
WasmInitExpr Offset
Definition: Wasm.h:418
std::vector< uint32_t > Functions
Definition: Wasm.h:419
StringRef Name
Definition: Wasm.h:302
uint32_t Index
Definition: Wasm.h:304
std::optional< StringRef > ExportName
Definition: Wasm.h:389
uint32_t CodeSectionOffset
Definition: Wasm.h:386
uint32_t Offset
Definition: Wasm.h:354
WasmGlobalType Type
Definition: Wasm.h:351
WasmLimits Memory
Definition: Wasm.h:372
StringRef Field
Definition: Wasm.h:366
WasmGlobalType Global
Definition: Wasm.h:370
StringRef Module
Definition: Wasm.h:365
uint32_t SigIndex
Definition: Wasm.h:369
WasmTableType Table
Definition: Wasm.h:371
union llvm::wasm::WasmInitExprMVP::@178 Value
WasmInitExprMVP Inst
Definition: Wasm.h:340
ArrayRef< uint8_t > Body
Definition: Wasm.h:341
std::vector< WasmInitFunc > InitFunctions
Definition: Wasm.h:476
std::vector< StringRef > Comdats
Definition: Wasm.h:477
std::vector< std::pair< std::string, std::string > > SDKs
Definition: Wasm.h:293
std::vector< std::pair< std::string, std::string > > Languages
Definition: Wasm.h:291
std::vector< std::pair< std::string, std::string > > Tools
Definition: Wasm.h:292
enum llvm::wasm::WasmSignature::@183 Kind
SmallVector< ValType, 1 > Returns
Definition: Wasm.h:485
SmallVector< ValType, 4 > Params
Definition: Wasm.h:486
WasmDataReference DataRef
Definition: Wasm.h:457
WasmLimits Limits
Definition: Wasm.h:315
WasmTableType Type
Definition: Wasm.h:320
StringRef SymbolName
Definition: Wasm.h:321
struct llvm::object::DataRefImpl::@353 d