clang-tools  3.8.0
StaticObjectExceptionCheck.cpp
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1 //===--- StaticObjectExceptionCheck.cpp - clang-tidy-----------------------===//
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 
11 #include "../utils/Matchers.h"
12 #include "clang/AST/ASTContext.h"
13 #include "clang/ASTMatchers/ASTMatchFinder.h"
14 
15 using namespace clang::ast_matchers;
16 
17 namespace clang {
18 namespace tidy {
19 namespace cert {
20 
21 void StaticObjectExceptionCheck::registerMatchers(MatchFinder *Finder) {
22  if (!getLangOpts().CPlusPlus)
23  return;
24 
25  // Match any static or thread_local variable declaration that is initialized
26  // with a constructor that can throw.
27  Finder->addMatcher(
28  varDecl(anyOf(hasThreadStorageDuration(), hasStaticStorageDuration()),
29  hasInitializer(cxxConstructExpr(hasDeclaration(
30  cxxConstructorDecl(unless(isNoThrow()))
31  .bind("ctor")))))
32  .bind("var"),
33  this);
34 }
35 
36 void StaticObjectExceptionCheck::check(const MatchFinder::MatchResult &Result) {
37  const auto *VD = Result.Nodes.getNodeAs<VarDecl>("var");
38  const auto *Ctor = Result.Nodes.getNodeAs<CXXConstructorDecl>("ctor");
39 
40  diag(VD->getLocation(),
41  "construction of %0 with %select{static|thread_local}1 storage "
42  "duration may throw an exception that cannot be caught")
43  << VD << (VD->getStorageDuration() == SD_Static ? 0 : 1);
44  diag(Ctor->getLocation(), "possibly throwing constructor declared here",
45  DiagnosticIDs::Note);
46 }
47 
48 } // namespace cert
49 } // namespace tidy
50 } // namespace clang
std::unique_ptr< ast_matchers::MatchFinder > Finder
Definition: ClangTidy.cpp:188
const NamedDecl * Result
Definition: USRFinder.cpp:121