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//===- unittests/Analysis/CFGBuildResult.h - CFG tests --------------------===//
//
// 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 "clang/Analysis/CFG.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Tooling/Tooling.h"
namespace clang {
namespace analysis {
class BuildResult {
public:
enum Status {
ToolFailed,
ToolRan,
SawFunctionBody,
BuiltCFG,
};
BuildResult(Status S, std::unique_ptr<CFG> Cfg = nullptr)
: S(S), Cfg(std::move(Cfg)) {}
Status getStatus() const { return S; }
CFG *getCFG() const { return Cfg.get(); }
private:
Status S;
std::unique_ptr<CFG> Cfg;
};
class CFGCallback : public ast_matchers::MatchFinder::MatchCallback {
public:
BuildResult TheBuildResult = BuildResult::ToolRan;
void run(const ast_matchers::MatchFinder::MatchResult &Result) override {
const auto *Func = Result.Nodes.getNodeAs<FunctionDecl>("func");
Stmt *Body = Func->getBody();
if (!Body)
return;
TheBuildResult = BuildResult::SawFunctionBody;
CFG::BuildOptions Options;
Options.AddImplicitDtors = true;
if (std::unique_ptr<CFG> Cfg =
CFG::buildCFG(nullptr, Body, Result.Context, Options))
TheBuildResult = {BuildResult::BuiltCFG, std::move(Cfg)};
}
};
inline BuildResult BuildCFG(const char *Code) {
CFGCallback Callback;
ast_matchers::MatchFinder Finder;
Finder.addMatcher(ast_matchers::functionDecl().bind("func"), &Callback);
std::unique_ptr<tooling::FrontendActionFactory> Factory(
tooling::newFrontendActionFactory(&Finder));
std::vector<std::string> Args = {"-std=c++11",
"-fno-delayed-template-parsing"};
if (!tooling::runToolOnCodeWithArgs(Factory->create(), Code, Args))
return BuildResult::ToolFailed;
return std::move(Callback.TheBuildResult);
}
} // namespace analysis
} // namespace clang
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