clang-tools  8.0.0
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) || (!getLangOpts().CXXExceptions))
23  return;
24 
25  // Match any static or thread_local variable declaration that has an
26  // initializer that can throw.
27  Finder->addMatcher(
28  varDecl(anyOf(hasThreadStorageDuration(), hasStaticStorageDuration()),
29  unless(anyOf(isConstexpr(), hasType(cxxRecordDecl(isLambda())),
30  hasAncestor(functionDecl()))),
31  anyOf(hasDescendant(cxxConstructExpr(hasDeclaration(
32  cxxConstructorDecl(unless(isNoThrow())).bind("func")))),
33  hasDescendant(cxxNewExpr(hasDeclaration(
34  functionDecl(unless(isNoThrow())).bind("func")))),
35  hasDescendant(callExpr(hasDeclaration(
36  functionDecl(unless(isNoThrow())).bind("func"))))))
37  .bind("var"),
38  this);
39 }
40 
41 void StaticObjectExceptionCheck::check(const MatchFinder::MatchResult &Result) {
42  const auto *VD = Result.Nodes.getNodeAs<VarDecl>("var");
43  const auto *Func = Result.Nodes.getNodeAs<FunctionDecl>("func");
44 
45  diag(VD->getLocation(),
46  "initialization of %0 with %select{static|thread_local}1 storage "
47  "duration may throw an exception that cannot be caught")
48  << VD << (VD->getStorageDuration() == SD_Static ? 0 : 1);
49 
50  SourceLocation FuncLocation = Func->getLocation();
51  if (FuncLocation.isValid()) {
52  diag(FuncLocation,
53  "possibly throwing %select{constructor|function}0 declared here",
54  DiagnosticIDs::Note)
55  << (isa<CXXConstructorDecl>(Func) ? 0 : 1);
56  }
57 }
58 
59 } // namespace cert
60 } // namespace tidy
61 } // namespace clang
llvm::Optional< llvm::Expected< tooling::AtomicChanges > > Result
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//