forked from OSchip/llvm-project
187 lines
6.5 KiB
C++
187 lines
6.5 KiB
C++
//===--- tools/clang-check/ClangCheck.cpp - Clang check tool --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a clang-check tool that runs clang based on the info
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// stored in a compilation database.
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//
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// This tool uses the Clang Tooling infrastructure, see
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// http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html
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// for details on setting it up with LLVM source tree.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/ASTConsumer.h"
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#include "clang/CodeGen/ObjectFilePCHContainerOperations.h"
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#include "clang/Driver/Options.h"
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#include "clang/Frontend/ASTConsumers.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Rewrite/Frontend/FixItRewriter.h"
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#include "clang/Rewrite/Frontend/FrontendActions.h"
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#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
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#include "clang/Tooling/CommonOptionsParser.h"
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#include "clang/Tooling/Tooling.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Option/OptTable.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/TargetSelect.h"
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using namespace clang::driver;
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using namespace clang::tooling;
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using namespace llvm;
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static cl::extrahelp CommonHelp(CommonOptionsParser::HelpMessage);
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static cl::extrahelp MoreHelp(
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"\tFor example, to run clang-check on all files in a subtree of the\n"
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"\tsource tree, use:\n"
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"\n"
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"\t find path/in/subtree -name '*.cpp'|xargs clang-check\n"
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"\n"
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"\tor using a specific build path:\n"
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"\n"
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"\t find path/in/subtree -name '*.cpp'|xargs clang-check -p build/path\n"
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"\n"
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"\tNote, that path/in/subtree and current directory should follow the\n"
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"\trules described above.\n"
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"\n"
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);
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static cl::OptionCategory ClangCheckCategory("clang-check options");
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static std::unique_ptr<opt::OptTable> Options(createDriverOptTable());
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static cl::opt<bool>
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ASTDump("ast-dump", cl::desc(Options->getOptionHelpText(options::OPT_ast_dump)),
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cl::cat(ClangCheckCategory));
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static cl::opt<bool>
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ASTList("ast-list", cl::desc(Options->getOptionHelpText(options::OPT_ast_list)),
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cl::cat(ClangCheckCategory));
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static cl::opt<bool>
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ASTPrint("ast-print",
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cl::desc(Options->getOptionHelpText(options::OPT_ast_print)),
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cl::cat(ClangCheckCategory));
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static cl::opt<std::string> ASTDumpFilter(
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"ast-dump-filter",
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cl::desc(Options->getOptionHelpText(options::OPT_ast_dump_filter)),
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cl::cat(ClangCheckCategory));
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static cl::opt<bool>
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Analyze("analyze", cl::desc(Options->getOptionHelpText(options::OPT_analyze)),
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cl::cat(ClangCheckCategory));
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static cl::opt<bool>
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Fixit("fixit", cl::desc(Options->getOptionHelpText(options::OPT_fixit)),
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cl::cat(ClangCheckCategory));
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static cl::opt<bool> FixWhatYouCan(
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"fix-what-you-can",
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cl::desc(Options->getOptionHelpText(options::OPT_fix_what_you_can)),
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cl::cat(ClangCheckCategory));
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namespace {
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// FIXME: Move FixItRewriteInPlace from lib/Rewrite/Frontend/FrontendActions.cpp
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// into a header file and reuse that.
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class FixItOptions : public clang::FixItOptions {
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public:
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FixItOptions() {
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FixWhatYouCan = ::FixWhatYouCan;
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}
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std::string RewriteFilename(const std::string& filename, int &fd) override {
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assert(llvm::sys::path::is_absolute(filename) &&
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"clang-fixit expects absolute paths only.");
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// We don't need to do permission checking here since clang will diagnose
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// any I/O errors itself.
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fd = -1; // No file descriptor for file.
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return filename;
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}
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};
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/// \brief Subclasses \c clang::FixItRewriter to not count fixed errors/warnings
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/// in the final error counts.
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///
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/// This has the side-effect that clang-check -fixit exits with code 0 on
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/// successfully fixing all errors.
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class FixItRewriter : public clang::FixItRewriter {
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public:
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FixItRewriter(clang::DiagnosticsEngine& Diags,
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clang::SourceManager& SourceMgr,
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const clang::LangOptions& LangOpts,
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clang::FixItOptions* FixItOpts)
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: clang::FixItRewriter(Diags, SourceMgr, LangOpts, FixItOpts) {
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}
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bool IncludeInDiagnosticCounts() const override { return false; }
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};
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/// \brief Subclasses \c clang::FixItAction so that we can install the custom
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/// \c FixItRewriter.
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class FixItAction : public clang::FixItAction {
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public:
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bool BeginSourceFileAction(clang::CompilerInstance& CI,
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StringRef Filename) override {
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FixItOpts.reset(new FixItOptions);
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Rewriter.reset(new FixItRewriter(CI.getDiagnostics(), CI.getSourceManager(),
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CI.getLangOpts(), FixItOpts.get()));
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return true;
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}
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};
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class ClangCheckActionFactory {
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public:
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std::unique_ptr<clang::ASTConsumer> newASTConsumer() {
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if (ASTList)
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return clang::CreateASTDeclNodeLister();
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if (ASTDump)
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return clang::CreateASTDumper(ASTDumpFilter, /*DumpDecls=*/true,
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/*DumpLookups=*/false);
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if (ASTPrint)
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return clang::CreateASTPrinter(&llvm::outs(), ASTDumpFilter);
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return llvm::make_unique<clang::ASTConsumer>();
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}
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};
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} // namespace
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int main(int argc, const char **argv) {
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llvm::sys::PrintStackTraceOnErrorSignal(argv[0]);
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// Initialize targets for clang module support.
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llvm::InitializeAllTargets();
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llvm::InitializeAllTargetMCs();
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llvm::InitializeAllAsmPrinters();
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llvm::InitializeAllAsmParsers();
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CommonOptionsParser OptionsParser(argc, argv, ClangCheckCategory);
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ClangTool Tool(OptionsParser.getCompilations(),
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OptionsParser.getSourcePathList());
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// Clear adjusters because -fsyntax-only is inserted by the default chain.
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Tool.clearArgumentsAdjusters();
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Tool.appendArgumentsAdjuster(getClangStripOutputAdjuster());
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// Running the analyzer requires --analyze. Other modes can work with the
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// -fsyntax-only option.
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Tool.appendArgumentsAdjuster(getInsertArgumentAdjuster(
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Analyze ? "--analyze" : "-fsyntax-only", ArgumentInsertPosition::BEGIN));
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ClangCheckActionFactory CheckFactory;
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std::unique_ptr<FrontendActionFactory> FrontendFactory;
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// Choose the correct factory based on the selected mode.
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if (Analyze)
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FrontendFactory = newFrontendActionFactory<clang::ento::AnalysisAction>();
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else if (Fixit)
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FrontendFactory = newFrontendActionFactory<FixItAction>();
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else
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FrontendFactory = newFrontendActionFactory(&CheckFactory);
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return Tool.run(FrontendFactory.get());
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}
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