From 0b57cec536236d46e3dba9bd041533462f33dbb7 Mon Sep 17 00:00:00 2001 From: Dimitry Andric Date: Fri, 20 Dec 2019 19:53:05 +0000 Subject: Move all sources from the llvm project into contrib/llvm-project. This uses the new layout of the upstream repository, which was recently migrated to GitHub, and converted into a "monorepo". That is, most of the earlier separate sub-projects with their own branches and tags were consolidated into one top-level directory, and are now branched and tagged together. Updating the vendor area to match this layout is next. --- .../clang/lib/Tooling/JSONCompilationDatabase.cpp | 433 --------------------- 1 file changed, 433 deletions(-) delete mode 100644 contrib/llvm/tools/clang/lib/Tooling/JSONCompilationDatabase.cpp (limited to 'contrib/llvm/tools/clang/lib/Tooling/JSONCompilationDatabase.cpp') diff --git a/contrib/llvm/tools/clang/lib/Tooling/JSONCompilationDatabase.cpp b/contrib/llvm/tools/clang/lib/Tooling/JSONCompilationDatabase.cpp deleted file mode 100644 index f19a0f7550b9..000000000000 --- a/contrib/llvm/tools/clang/lib/Tooling/JSONCompilationDatabase.cpp +++ /dev/null @@ -1,433 +0,0 @@ -//===- JSONCompilationDatabase.cpp ----------------------------------------===// -// -// 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 -// -//===----------------------------------------------------------------------===// -// -// This file contains the implementation of the JSONCompilationDatabase. -// -//===----------------------------------------------------------------------===// - -#include "clang/Tooling/JSONCompilationDatabase.h" -#include "clang/Basic/LLVM.h" -#include "clang/Tooling/CompilationDatabase.h" -#include "clang/Tooling/CompilationDatabasePluginRegistry.h" -#include "clang/Tooling/Tooling.h" -#include "llvm/ADT/Optional.h" -#include "llvm/ADT/STLExtras.h" -#include "llvm/ADT/SmallString.h" -#include "llvm/ADT/SmallVector.h" -#include "llvm/ADT/StringRef.h" -#include "llvm/ADT/Triple.h" -#include "llvm/Support/Allocator.h" -#include "llvm/Support/Casting.h" -#include "llvm/Support/CommandLine.h" -#include "llvm/Support/ErrorOr.h" -#include "llvm/Support/Host.h" -#include "llvm/Support/MemoryBuffer.h" -#include "llvm/Support/Path.h" -#include "llvm/Support/StringSaver.h" -#include "llvm/Support/YAMLParser.h" -#include "llvm/Support/raw_ostream.h" -#include -#include -#include -#include -#include -#include -#include - -using namespace clang; -using namespace tooling; - -namespace { - -/// A parser for escaped strings of command line arguments. -/// -/// Assumes \-escaping for quoted arguments (see the documentation of -/// unescapeCommandLine(...)). -class CommandLineArgumentParser { - public: - CommandLineArgumentParser(StringRef CommandLine) - : Input(CommandLine), Position(Input.begin()-1) {} - - std::vector parse() { - bool HasMoreInput = true; - while (HasMoreInput && nextNonWhitespace()) { - std::string Argument; - HasMoreInput = parseStringInto(Argument); - CommandLine.push_back(Argument); - } - return CommandLine; - } - - private: - // All private methods return true if there is more input available. - - bool parseStringInto(std::string &String) { - do { - if (*Position == '"') { - if (!parseDoubleQuotedStringInto(String)) return false; - } else if (*Position == '\'') { - if (!parseSingleQuotedStringInto(String)) return false; - } else { - if (!parseFreeStringInto(String)) return false; - } - } while (*Position != ' '); - return true; - } - - bool parseDoubleQuotedStringInto(std::string &String) { - if (!next()) return false; - while (*Position != '"') { - if (!skipEscapeCharacter()) return false; - String.push_back(*Position); - if (!next()) return false; - } - return next(); - } - - bool parseSingleQuotedStringInto(std::string &String) { - if (!next()) return false; - while (*Position != '\'') { - String.push_back(*Position); - if (!next()) return false; - } - return next(); - } - - bool parseFreeStringInto(std::string &String) { - do { - if (!skipEscapeCharacter()) return false; - String.push_back(*Position); - if (!next()) return false; - } while (*Position != ' ' && *Position != '"' && *Position != '\''); - return true; - } - - bool skipEscapeCharacter() { - if (*Position == '\\') { - return next(); - } - return true; - } - - bool nextNonWhitespace() { - do { - if (!next()) return false; - } while (*Position == ' '); - return true; - } - - bool next() { - ++Position; - return Position != Input.end(); - } - - const StringRef Input; - StringRef::iterator Position; - std::vector CommandLine; -}; - -std::vector unescapeCommandLine(JSONCommandLineSyntax Syntax, - StringRef EscapedCommandLine) { - if (Syntax == JSONCommandLineSyntax::AutoDetect) { - Syntax = JSONCommandLineSyntax::Gnu; - llvm::Triple Triple(llvm::sys::getProcessTriple()); - if (Triple.getOS() == llvm::Triple::OSType::Win32) { - // Assume Windows command line parsing on Win32 unless the triple - // explicitly tells us otherwise. - if (!Triple.hasEnvironment() || - Triple.getEnvironment() == llvm::Triple::EnvironmentType::MSVC) - Syntax = JSONCommandLineSyntax::Windows; - } - } - - if (Syntax == JSONCommandLineSyntax::Windows) { - llvm::BumpPtrAllocator Alloc; - llvm::StringSaver Saver(Alloc); - llvm::SmallVector T; - llvm::cl::TokenizeWindowsCommandLine(EscapedCommandLine, Saver, T); - std::vector Result(T.begin(), T.end()); - return Result; - } - assert(Syntax == JSONCommandLineSyntax::Gnu); - CommandLineArgumentParser parser(EscapedCommandLine); - return parser.parse(); -} - -// This plugin locates a nearby compile_command.json file, and also infers -// compile commands for files not present in the database. -class JSONCompilationDatabasePlugin : public CompilationDatabasePlugin { - std::unique_ptr - loadFromDirectory(StringRef Directory, std::string &ErrorMessage) override { - SmallString<1024> JSONDatabasePath(Directory); - llvm::sys::path::append(JSONDatabasePath, "compile_commands.json"); - auto Base = JSONCompilationDatabase::loadFromFile( - JSONDatabasePath, ErrorMessage, JSONCommandLineSyntax::AutoDetect); - return Base ? inferTargetAndDriverMode( - inferMissingCompileCommands(std::move(Base))) - : nullptr; - } -}; - -} // namespace - -// Register the JSONCompilationDatabasePlugin with the -// CompilationDatabasePluginRegistry using this statically initialized variable. -static CompilationDatabasePluginRegistry::Add -X("json-compilation-database", "Reads JSON formatted compilation databases"); - -namespace clang { -namespace tooling { - -// This anchor is used to force the linker to link in the generated object file -// and thus register the JSONCompilationDatabasePlugin. -volatile int JSONAnchorSource = 0; - -} // namespace tooling -} // namespace clang - -std::unique_ptr -JSONCompilationDatabase::loadFromFile(StringRef FilePath, - std::string &ErrorMessage, - JSONCommandLineSyntax Syntax) { - // Don't mmap: if we're a long-lived process, the build system may overwrite. - llvm::ErrorOr> DatabaseBuffer = - llvm::MemoryBuffer::getFile(FilePath, /*FileSize=*/-1, - /*RequiresNullTerminator=*/true, - /*IsVolatile=*/true); - if (std::error_code Result = DatabaseBuffer.getError()) { - ErrorMessage = "Error while opening JSON database: " + Result.message(); - return nullptr; - } - std::unique_ptr Database( - new JSONCompilationDatabase(std::move(*DatabaseBuffer), Syntax)); - if (!Database->parse(ErrorMessage)) - return nullptr; - return Database; -} - -std::unique_ptr -JSONCompilationDatabase::loadFromBuffer(StringRef DatabaseString, - std::string &ErrorMessage, - JSONCommandLineSyntax Syntax) { - std::unique_ptr DatabaseBuffer( - llvm::MemoryBuffer::getMemBuffer(DatabaseString)); - std::unique_ptr Database( - new JSONCompilationDatabase(std::move(DatabaseBuffer), Syntax)); - if (!Database->parse(ErrorMessage)) - return nullptr; - return Database; -} - -std::vector -JSONCompilationDatabase::getCompileCommands(StringRef FilePath) const { - SmallString<128> NativeFilePath; - llvm::sys::path::native(FilePath, NativeFilePath); - - std::string Error; - llvm::raw_string_ostream ES(Error); - StringRef Match = MatchTrie.findEquivalent(NativeFilePath, ES); - if (Match.empty()) - return {}; - const auto CommandsRefI = IndexByFile.find(Match); - if (CommandsRefI == IndexByFile.end()) - return {}; - std::vector Commands; - getCommands(CommandsRefI->getValue(), Commands); - return Commands; -} - -std::vector -JSONCompilationDatabase::getAllFiles() const { - std::vector Result; - for (const auto &CommandRef : IndexByFile) - Result.push_back(CommandRef.first().str()); - return Result; -} - -std::vector -JSONCompilationDatabase::getAllCompileCommands() const { - std::vector Commands; - getCommands(AllCommands, Commands); - return Commands; -} - -static llvm::StringRef stripExecutableExtension(llvm::StringRef Name) { - Name.consume_back(".exe"); - return Name; -} - -// There are compiler-wrappers (ccache, distcc, gomacc) that take the "real" -// compiler as an argument, e.g. distcc gcc -O3 foo.c. -// These end up in compile_commands.json when people set CC="distcc gcc". -// Clang's driver doesn't understand this, so we need to unwrap. -static bool unwrapCommand(std::vector &Args) { - if (Args.size() < 2) - return false; - StringRef Wrapper = - stripExecutableExtension(llvm::sys::path::filename(Args.front())); - if (Wrapper == "distcc" || Wrapper == "gomacc" || Wrapper == "ccache") { - // Most of these wrappers support being invoked 3 ways: - // `distcc g++ file.c` This is the mode we're trying to match. - // We need to drop `distcc`. - // `distcc file.c` This acts like compiler is cc or similar. - // Clang's driver can handle this, no change needed. - // `g++ file.c` g++ is a symlink to distcc. - // We don't even notice this case, and all is well. - // - // We need to distinguish between the first and second case. - // The wrappers themselves don't take flags, so Args[1] is a compiler flag, - // an input file, or a compiler. Inputs have extensions, compilers don't. - bool HasCompiler = - (Args[1][0] != '-') && - !llvm::sys::path::has_extension(stripExecutableExtension(Args[1])); - if (HasCompiler) { - Args.erase(Args.begin()); - return true; - } - // If !HasCompiler, wrappers act like GCC. Fine: so do we. - } - return false; -} - -static std::vector -nodeToCommandLine(JSONCommandLineSyntax Syntax, - const std::vector &Nodes) { - SmallString<1024> Storage; - std::vector Arguments; - if (Nodes.size() == 1) - Arguments = unescapeCommandLine(Syntax, Nodes[0]->getValue(Storage)); - else - for (const auto *Node : Nodes) - Arguments.push_back(Node->getValue(Storage)); - // There may be multiple wrappers: using distcc and ccache together is common. - while (unwrapCommand(Arguments)) - ; - return Arguments; -} - -void JSONCompilationDatabase::getCommands( - ArrayRef CommandsRef, - std::vector &Commands) const { - for (const auto &CommandRef : CommandsRef) { - SmallString<8> DirectoryStorage; - SmallString<32> FilenameStorage; - SmallString<32> OutputStorage; - auto Output = std::get<3>(CommandRef); - Commands.emplace_back( - std::get<0>(CommandRef)->getValue(DirectoryStorage), - std::get<1>(CommandRef)->getValue(FilenameStorage), - nodeToCommandLine(Syntax, std::get<2>(CommandRef)), - Output ? Output->getValue(OutputStorage) : ""); - } -} - -bool JSONCompilationDatabase::parse(std::string &ErrorMessage) { - llvm::yaml::document_iterator I = YAMLStream.begin(); - if (I == YAMLStream.end()) { - ErrorMessage = "Error while parsing YAML."; - return false; - } - llvm::yaml::Node *Root = I->getRoot(); - if (!Root) { - ErrorMessage = "Error while parsing YAML."; - return false; - } - auto *Array = dyn_cast(Root); - if (!Array) { - ErrorMessage = "Expected array."; - return false; - } - for (auto &NextObject : *Array) { - auto *Object = dyn_cast(&NextObject); - if (!Object) { - ErrorMessage = "Expected object."; - return false; - } - llvm::yaml::ScalarNode *Directory = nullptr; - llvm::Optional> Command; - llvm::yaml::ScalarNode *File = nullptr; - llvm::yaml::ScalarNode *Output = nullptr; - for (auto& NextKeyValue : *Object) { - auto *KeyString = dyn_cast(NextKeyValue.getKey()); - if (!KeyString) { - ErrorMessage = "Expected strings as key."; - return false; - } - SmallString<10> KeyStorage; - StringRef KeyValue = KeyString->getValue(KeyStorage); - llvm::yaml::Node *Value = NextKeyValue.getValue(); - if (!Value) { - ErrorMessage = "Expected value."; - return false; - } - auto *ValueString = dyn_cast(Value); - auto *SequenceString = dyn_cast(Value); - if (KeyValue == "arguments" && !SequenceString) { - ErrorMessage = "Expected sequence as value."; - return false; - } else if (KeyValue != "arguments" && !ValueString) { - ErrorMessage = "Expected string as value."; - return false; - } - if (KeyValue == "directory") { - Directory = ValueString; - } else if (KeyValue == "arguments") { - Command = std::vector(); - for (auto &Argument : *SequenceString) { - auto *Scalar = dyn_cast(&Argument); - if (!Scalar) { - ErrorMessage = "Only strings are allowed in 'arguments'."; - return false; - } - Command->push_back(Scalar); - } - } else if (KeyValue == "command") { - if (!Command) - Command = std::vector(1, ValueString); - } else if (KeyValue == "file") { - File = ValueString; - } else if (KeyValue == "output") { - Output = ValueString; - } else { - ErrorMessage = ("Unknown key: \"" + - KeyString->getRawValue() + "\"").str(); - return false; - } - } - if (!File) { - ErrorMessage = "Missing key: \"file\"."; - return false; - } - if (!Command) { - ErrorMessage = "Missing key: \"command\" or \"arguments\"."; - return false; - } - if (!Directory) { - ErrorMessage = "Missing key: \"directory\"."; - return false; - } - SmallString<8> FileStorage; - StringRef FileName = File->getValue(FileStorage); - SmallString<128> NativeFilePath; - if (llvm::sys::path::is_relative(FileName)) { - SmallString<8> DirectoryStorage; - SmallString<128> AbsolutePath( - Directory->getValue(DirectoryStorage)); - llvm::sys::path::append(AbsolutePath, FileName); - llvm::sys::path::remove_dots(AbsolutePath, /*remove_dot_dot=*/ true); - llvm::sys::path::native(AbsolutePath, NativeFilePath); - } else { - llvm::sys::path::native(FileName, NativeFilePath); - } - auto Cmd = CompileCommandRef(Directory, File, *Command, Output); - IndexByFile[NativeFilePath].push_back(Cmd); - AllCommands.push_back(Cmd); - MatchTrie.insert(NativeFilePath); - } - return true; -} -- cgit v1.2.3