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//===- ClangSrcLocDump.cpp ------------------------------------*- C++ -*---===//
//
// 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/Basic/Diagnostic.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/Job.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/Tool.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Lex/PreprocessorOptions.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/JSON.h"
#include "ASTSrcLocProcessor.h"
using namespace clang::tooling;
using namespace clang;
using namespace llvm;
static cl::list<std::string> IncludeDirectories(
"I", cl::desc("Include directories to use while compiling"),
cl::value_desc("directory"), cl::Required, cl::OneOrMore, cl::Prefix);
static cl::opt<bool>
SkipProcessing("skip-processing",
cl::desc("Avoid processing the AST header file"),
cl::Required, cl::value_desc("bool"));
static cl::opt<std::string> JsonOutputPath("json-output-path",
cl::desc("json output path"),
cl::Required,
cl::value_desc("path"));
class ASTSrcLocGenerationAction : public clang::ASTFrontendAction {
public:
ASTSrcLocGenerationAction() : Processor(JsonOutputPath) {}
void ExecuteAction() override {
clang::ASTFrontendAction::ExecuteAction();
if (getCompilerInstance().getDiagnostics().getNumErrors() > 0)
Processor.generateEmpty();
else
Processor.generate();
}
std::unique_ptr<clang::ASTConsumer>
CreateASTConsumer(clang::CompilerInstance &Compiler,
llvm::StringRef File) override {
return Processor.createASTConsumer(Compiler, File);
}
private:
ASTSrcLocProcessor Processor;
};
static const char Filename[] = "ASTTU.cpp";
int main(int argc, const char **argv) {
cl::ParseCommandLineOptions(argc, argv);
if (SkipProcessing) {
std::error_code EC;
llvm::raw_fd_ostream JsonOut(JsonOutputPath, EC, llvm::sys::fs::OF_Text);
if (EC)
return 1;
JsonOut << formatv("{0:2}", llvm::json::Value(llvm::json::Object()));
return 0;
}
std::vector<std::string> Args;
Args.push_back("-cc1");
llvm::transform(IncludeDirectories, std::back_inserter(Args),
[](const std::string &IncDir) { return "-I" + IncDir; });
Args.push_back("-fsyntax-only");
Args.push_back(Filename);
std::vector<const char *> Argv(Args.size(), nullptr);
llvm::transform(Args, Argv.begin(),
[](const std::string &Arg) { return Arg.c_str(); });
IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
unsigned MissingArgIndex, MissingArgCount;
auto Opts = driver::getDriverOptTable();
auto ParsedArgs = Opts.ParseArgs(llvm::makeArrayRef(Argv).slice(1),
MissingArgIndex, MissingArgCount);
ParseDiagnosticArgs(*DiagOpts, ParsedArgs);
// Don't output diagnostics, because common scenarios such as
// cross-compiling fail with diagnostics. This is not fatal, but
// just causes attempts to use the introspection API to return no data.
TextDiagnosticPrinter DiagnosticPrinter(llvm::nulls(), &*DiagOpts);
DiagnosticsEngine Diagnostics(
IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs()), &*DiagOpts,
&DiagnosticPrinter, false);
auto *OFS = new llvm::vfs::OverlayFileSystem(vfs::getRealFileSystem());
auto *MemFS = new llvm::vfs::InMemoryFileSystem();
OFS->pushOverlay(MemFS);
MemFS->addFile(Filename, 0,
MemoryBuffer::getMemBuffer("#include \"clang/AST/AST.h\"\n"));
auto Files = llvm::makeIntrusiveRefCnt<FileManager>(FileSystemOptions(), OFS);
auto Driver = std::make_unique<driver::Driver>(
"clang", llvm::sys::getDefaultTargetTriple(), Diagnostics,
"ast-api-dump-tool", OFS);
std::unique_ptr<clang::driver::Compilation> Comp(
Driver->BuildCompilation(llvm::makeArrayRef(Argv)));
if (!Comp)
return 1;
const auto &Jobs = Comp->getJobs();
if (Jobs.size() != 1 || !isa<driver::Command>(*Jobs.begin())) {
SmallString<256> error_msg;
llvm::raw_svector_ostream error_stream(error_msg);
Jobs.Print(error_stream, "; ", true);
return 1;
}
const auto &Cmd = cast<driver::Command>(*Jobs.begin());
const llvm::opt::ArgStringList &CC1Args = Cmd.getArguments();
auto Invocation = std::make_unique<CompilerInvocation>();
CompilerInvocation::CreateFromArgs(*Invocation, CC1Args, Diagnostics);
CompilerInstance Compiler(std::make_shared<clang::PCHContainerOperations>());
Compiler.setInvocation(std::move(Invocation));
Compiler.createDiagnostics(&DiagnosticPrinter, false);
if (!Compiler.hasDiagnostics())
return 1;
// Suppress "2 errors generated" or similar messages
Compiler.getDiagnosticOpts().ShowCarets = false;
Compiler.createSourceManager(*Files);
Compiler.setFileManager(Files.get());
ASTSrcLocGenerationAction ScopedToolAction;
Compiler.ExecuteAction(ScopedToolAction);
Files->clearStatCache();
return 0;
}
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