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| //===--- ExceptionEscapeCheck.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 "ExceptionEscapeCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/OpenMPClause.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/StmtOpenMP.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/ASTMatchers/ASTMatchersMacros.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace openmp {
ExceptionEscapeCheck::ExceptionEscapeCheck(StringRef Name,
ClangTidyContext *Context)
: ClangTidyCheck(Name, Context),
RawIgnoredExceptions(Options.get("IgnoredExceptions", "")) {
llvm::SmallVector<StringRef, 8> FunctionsThatShouldNotThrowVec,
IgnoredExceptionsVec;
llvm::StringSet<> IgnoredExceptions;
StringRef(RawIgnoredExceptions).split(IgnoredExceptionsVec, ",", -1, false);
llvm::transform(IgnoredExceptionsVec, IgnoredExceptionsVec.begin(),
[](StringRef S) { return S.trim(); });
IgnoredExceptions.insert(IgnoredExceptionsVec.begin(),
IgnoredExceptionsVec.end());
Tracer.ignoreExceptions(std::move(IgnoredExceptions));
Tracer.ignoreBadAlloc(true);
}
void ExceptionEscapeCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
Options.store(Opts, "IgnoredExceptions", RawIgnoredExceptions);
}
void ExceptionEscapeCheck::registerMatchers(MatchFinder *Finder) {
// Don't register the check if OpenMP is not enabled; the OpenMP pragmas are
// completely ignored then, so no OpenMP entires will be present in the AST.
if (!getLangOpts().OpenMP)
return;
// Similarly, if C++ Exceptions are not enabled, nothing to do.
if (!getLangOpts().CPlusPlus || !getLangOpts().CXXExceptions)
return;
Finder->addMatcher(ompExecutableDirective(
unless(isStandaloneDirective()),
hasStructuredBlock(stmt().bind("structured-block")))
.bind("directive"),
this);
}
void ExceptionEscapeCheck::check(const MatchFinder::MatchResult &Result) {
const auto *Directive =
Result.Nodes.getNodeAs<OMPExecutableDirective>("directive");
assert(Directive && "Expected to match some OpenMP Executable directive.");
const auto *StructuredBlock =
Result.Nodes.getNodeAs<Stmt>("structured-block");
assert(StructuredBlock && "Expected to get some OpenMP Structured Block.");
if (Tracer.analyze(StructuredBlock).getBehaviour() !=
utils::ExceptionAnalyzer::State::Throwing)
return; // No exceptions have been proven to escape out of the struc. block.
// FIXME: We should provide more information about the exact location where
// the exception is thrown, maybe the full path the exception escapes.
diag(StructuredBlock->getBeginLoc(),
"an exception thrown inside of the OpenMP '%0' region is not caught in "
"that same region")
<< getOpenMPDirectiveName(Directive->getDirectiveKind());
}
} // namespace openmp
} // namespace tidy
} // namespace clang
|