forked from OSchip/llvm-project
88 lines
3.2 KiB
C++
88 lines
3.2 KiB
C++
//===--- ExceptionEscapeCheck.cpp - clang-tidy ----------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "ExceptionEscapeCheck.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "llvm/ADT/SmallSet.h"
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#include "llvm/ADT/StringSet.h"
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using namespace clang::ast_matchers;
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namespace clang {
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namespace {
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AST_MATCHER_P(FunctionDecl, isEnabled, llvm::StringSet<>,
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FunctionsThatShouldNotThrow) {
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return FunctionsThatShouldNotThrow.count(Node.getNameAsString()) > 0;
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}
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} // namespace
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namespace tidy {
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namespace bugprone {
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ExceptionEscapeCheck::ExceptionEscapeCheck(StringRef Name,
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ClangTidyContext *Context)
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: ClangTidyCheck(Name, Context), RawFunctionsThatShouldNotThrow(Options.get(
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"FunctionsThatShouldNotThrow", "")),
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RawIgnoredExceptions(Options.get("IgnoredExceptions", "")) {
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llvm::SmallVector<StringRef, 8> FunctionsThatShouldNotThrowVec,
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IgnoredExceptionsVec;
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StringRef(RawFunctionsThatShouldNotThrow)
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.split(FunctionsThatShouldNotThrowVec, ",", -1, false);
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FunctionsThatShouldNotThrow.insert(FunctionsThatShouldNotThrowVec.begin(),
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FunctionsThatShouldNotThrowVec.end());
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llvm::StringSet<> IgnoredExceptions;
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StringRef(RawIgnoredExceptions).split(IgnoredExceptionsVec, ",", -1, false);
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IgnoredExceptions.insert(IgnoredExceptionsVec.begin(),
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IgnoredExceptionsVec.end());
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Tracer.ignoreExceptions(std::move(IgnoredExceptions));
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Tracer.ignoreBadAlloc(true);
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}
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void ExceptionEscapeCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
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Options.store(Opts, "FunctionsThatShouldNotThrow",
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RawFunctionsThatShouldNotThrow);
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Options.store(Opts, "IgnoredExceptions", RawIgnoredExceptions);
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}
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void ExceptionEscapeCheck::registerMatchers(MatchFinder *Finder) {
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if (!getLangOpts().CPlusPlus || !getLangOpts().CXXExceptions)
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return;
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Finder->addMatcher(
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functionDecl(anyOf(isNoThrow(), cxxDestructorDecl(),
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cxxConstructorDecl(isMoveConstructor()),
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cxxMethodDecl(isMoveAssignmentOperator()),
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hasName("main"), hasName("swap"),
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isEnabled(FunctionsThatShouldNotThrow)))
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.bind("thrower"),
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this);
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}
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void ExceptionEscapeCheck::check(const MatchFinder::MatchResult &Result) {
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const auto *MatchedDecl = Result.Nodes.getNodeAs<FunctionDecl>("thrower");
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if (!MatchedDecl)
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return;
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if (Tracer.analyze(MatchedDecl).getBehaviour() ==
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utils::ExceptionAnalyzer::State::Throwing)
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// FIXME: We should provide more information about the exact location where
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// the exception is thrown, maybe the full path the exception escapes
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diag(MatchedDecl->getLocation(),
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"an exception may be thrown in function %0 "
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"which should not throw exceptions")
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<< MatchedDecl;
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}
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} // namespace bugprone
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} // namespace tidy
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} // namespace clang
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