clang-tools  7.0.0
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(hasAncestor(functionDecl())),
30  anyOf(hasDescendant(cxxConstructExpr(hasDeclaration(
31  cxxConstructorDecl(unless(isNoThrow())).bind("func")))),
32  hasDescendant(cxxNewExpr(hasDeclaration(
33  functionDecl(unless(isNoThrow())).bind("func")))),
34  hasDescendant(callExpr(hasDeclaration(
35  functionDecl(unless(isNoThrow())).bind("func"))))))
36  .bind("var"),
37  this);
38 }
39 
40 void StaticObjectExceptionCheck::check(const MatchFinder::MatchResult &Result) {
41  const auto *VD = Result.Nodes.getNodeAs<VarDecl>("var");
42  const auto *Func = Result.Nodes.getNodeAs<FunctionDecl>("func");
43 
44  diag(VD->getLocation(),
45  "initialization of %0 with %select{static|thread_local}1 storage "
46  "duration may throw an exception that cannot be caught")
47  << VD << (VD->getStorageDuration() == SD_Static ? 0 : 1);
48 
49  SourceLocation FuncLocation = Func->getLocation();
50  if (FuncLocation.isValid()) {
51  diag(FuncLocation,
52  "possibly throwing %select{constructor|function}0 declared here",
53  DiagnosticIDs::Note)
54  << (isa<CXXConstructorDecl>(Func) ? 0 : 1);
55  }
56 }
57 
58 } // namespace cert
59 } // namespace tidy
60 } // namespace clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//