forked from OSchip/llvm-project
134 lines
5.3 KiB
C++
134 lines
5.3 KiB
C++
//===--- Compiler.cpp --------------------------------------------*- C++-*-===//
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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 "Compiler.h"
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#include "support/Logger.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Lex/PreprocessorOptions.h"
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#include "clang/Serialization/PCHContainerOperations.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/FormatVariadic.h"
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namespace clang {
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namespace clangd {
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void IgnoreDiagnostics::log(DiagnosticsEngine::Level DiagLevel,
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const clang::Diagnostic &Info) {
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// FIXME: format lazily, in case vlog is off.
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llvm::SmallString<64> Message;
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Info.FormatDiagnostic(Message);
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llvm::SmallString<64> Location;
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if (Info.hasSourceManager() && Info.getLocation().isValid()) {
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auto &SourceMgr = Info.getSourceManager();
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auto Loc = SourceMgr.getFileLoc(Info.getLocation());
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llvm::raw_svector_ostream OS(Location);
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Loc.print(OS, SourceMgr);
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OS << ":";
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}
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clangd::vlog("Ignored diagnostic. {0}{1}", Location, Message);
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}
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void IgnoreDiagnostics::HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
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const clang::Diagnostic &Info) {
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IgnoreDiagnostics::log(DiagLevel, Info);
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}
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std::unique_ptr<CompilerInvocation>
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buildCompilerInvocation(const ParseInputs &Inputs, clang::DiagnosticConsumer &D,
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std::vector<std::string> *CC1Args) {
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std::vector<const char *> ArgStrs;
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for (const auto &S : Inputs.CompileCommand.CommandLine)
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ArgStrs.push_back(S.c_str());
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auto VFS = Inputs.TFS->view(Inputs.CompileCommand.Directory);
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llvm::IntrusiveRefCntPtr<DiagnosticsEngine> CommandLineDiagsEngine =
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CompilerInstance::createDiagnostics(new DiagnosticOptions, &D, false);
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std::unique_ptr<CompilerInvocation> CI = createInvocationFromCommandLine(
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ArgStrs, CommandLineDiagsEngine, std::move(VFS),
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/*ShouldRecoverOnErrors=*/true, CC1Args);
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if (!CI)
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return nullptr;
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// createInvocationFromCommandLine sets DisableFree.
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CI->getFrontendOpts().DisableFree = false;
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CI->getLangOpts()->CommentOpts.ParseAllComments = true;
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CI->getLangOpts()->RetainCommentsFromSystemHeaders = true;
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// Disable "clang -verify" diagnostics, they are rarely useful in clangd, and
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// our compiler invocation set-up doesn't seem to work with it (leading
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// assertions in VerifyDiagnosticConsumer).
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CI->getDiagnosticOpts().VerifyDiagnostics = false;
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// Disable any dependency outputting, we don't want to generate files or write
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// to stdout/stderr.
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CI->getDependencyOutputOpts().ShowIncludesDest =
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ShowIncludesDestination::None;
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CI->getDependencyOutputOpts().OutputFile.clear();
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CI->getDependencyOutputOpts().HeaderIncludeOutputFile.clear();
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CI->getDependencyOutputOpts().DOTOutputFile.clear();
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CI->getDependencyOutputOpts().ModuleDependencyOutputDir.clear();
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// Disable any pch generation/usage operations. Since serialized preamble
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// format is unstable, using an incompatible one might result in unexpected
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// behaviours, including crashes.
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CI->getPreprocessorOpts().ImplicitPCHInclude.clear();
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CI->getPreprocessorOpts().PrecompiledPreambleBytes = {0, false};
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CI->getPreprocessorOpts().PCHThroughHeader.clear();
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CI->getPreprocessorOpts().PCHWithHdrStop = false;
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CI->getPreprocessorOpts().PCHWithHdrStopCreate = false;
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// Don't crash on `#pragma clang __debug parser_crash`
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CI->getPreprocessorOpts().DisablePragmaDebugCrash = true;
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return CI;
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}
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std::unique_ptr<CompilerInstance>
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prepareCompilerInstance(std::unique_ptr<clang::CompilerInvocation> CI,
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const PrecompiledPreamble *Preamble,
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std::unique_ptr<llvm::MemoryBuffer> Buffer,
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llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS,
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DiagnosticConsumer &DiagsClient) {
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assert(VFS && "VFS is null");
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assert(!CI->getPreprocessorOpts().RetainRemappedFileBuffers &&
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"Setting RetainRemappedFileBuffers to true will cause a memory leak "
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"of ContentsBuffer");
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// NOTE: we use Buffer.get() when adding remapped files, so we have to make
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// sure it will be released if no error is emitted.
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if (Preamble) {
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Preamble->OverridePreamble(*CI, VFS, Buffer.get());
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} else {
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CI->getPreprocessorOpts().addRemappedFile(
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CI->getFrontendOpts().Inputs[0].getFile(), Buffer.get());
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}
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auto Clang = std::make_unique<CompilerInstance>(
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std::make_shared<PCHContainerOperations>());
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Clang->setInvocation(std::move(CI));
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Clang->createDiagnostics(&DiagsClient, false);
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if (auto VFSWithRemapping = createVFSFromCompilerInvocation(
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Clang->getInvocation(), Clang->getDiagnostics(), VFS))
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VFS = VFSWithRemapping;
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Clang->createFileManager(VFS);
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Clang->setTarget(TargetInfo::CreateTargetInfo(
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Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
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if (!Clang->hasTarget())
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return nullptr;
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// RemappedFileBuffers will handle the lifetime of the Buffer pointer,
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// release it.
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Buffer.release();
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return Clang;
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}
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} // namespace clangd
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} // namespace clang
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