StaticObjectExceptionCheck.cpp
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//===--- StaticObjectExceptionCheck.cpp - clang-tidy-----------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "StaticObjectExceptionCheck.h"
#include "../utils/Matchers.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace cert {
void StaticObjectExceptionCheck::registerMatchers(MatchFinder *Finder) {
// Match any static or thread_local variable declaration that has an
// initializer that can throw.
Finder->addMatcher(
traverse(
ast_type_traits::TK_AsIs,
varDecl(
anyOf(hasThreadStorageDuration(), hasStaticStorageDuration()),
unless(anyOf(isConstexpr(), hasType(cxxRecordDecl(isLambda())),
hasAncestor(functionDecl()))),
anyOf(hasDescendant(cxxConstructExpr(hasDeclaration(
cxxConstructorDecl(unless(isNoThrow())).bind("func")))),
hasDescendant(cxxNewExpr(hasDeclaration(
functionDecl(unless(isNoThrow())).bind("func")))),
hasDescendant(callExpr(hasDeclaration(
functionDecl(unless(isNoThrow())).bind("func"))))))
.bind("var")),
this);
}
void StaticObjectExceptionCheck::check(const MatchFinder::MatchResult &Result) {
const auto *VD = Result.Nodes.getNodeAs<VarDecl>("var");
const auto *Func = Result.Nodes.getNodeAs<FunctionDecl>("func");
diag(VD->getLocation(),
"initialization of %0 with %select{static|thread_local}1 storage "
"duration may throw an exception that cannot be caught")
<< VD << (VD->getStorageDuration() == SD_Static ? 0 : 1);
SourceLocation FuncLocation = Func->getLocation();
if (FuncLocation.isValid()) {
diag(FuncLocation,
"possibly throwing %select{constructor|function}0 declared here",
DiagnosticIDs::Note)
<< (isa<CXXConstructorDecl>(Func) ? 0 : 1);
}
}
} // namespace cert
} // namespace tidy
} // namespace clang