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//===--- Driver.h - Clang GCC Compatible Driver -----------------*- C++ -*-===//
// The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/LLVM.h"
#include "clang/Driver/Action.h"
#include "clang/Driver/Phases.h"
#include "clang/Driver/Types.h"
#include "clang/Driver/Util.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include <list>
#include <map>
#include <string>
namespace llvm {
class Triple;
namespace opt {
class Arg;
class ArgList;
class DerivedArgList;
class InputArgList;
class OptTable;
namespace clang {
namespace vfs {
class FileSystem;
namespace driver {
class Command;
class Compilation;
class InputInfo;
class JobList;
class JobAction;
class SanitizerArgs;
class ToolChain;
/// Describes the kind of LTO mode selected via -f(no-)?lto(=.*)? options.
enum LTOKind {
/// Driver - Encapsulate logic for constructing compilation processes
/// from a set of gcc-driver-like command line arguments.
class Driver {
llvm::opt::OptTable *Opts;
DiagnosticsEngine &Diags;
IntrusiveRefCntPtr<vfs::FileSystem> VFS;
enum DriverMode {
} Mode;
enum SaveTempsMode {
} SaveTemps;
enum BitcodeEmbedMode {
} BitcodeEmbed;
/// LTO mode selected via -f(no-)?lto(=.*)? options.
LTOKind LTOMode;
enum OpenMPRuntimeKind {
/// An unknown OpenMP runtime. We can't generate effective OpenMP code
/// without knowing what runtime to target.
/// The LLVM OpenMP runtime. When completed and integrated, this will become
/// the default for Clang.
/// The GNU OpenMP runtime. Clang doesn't support generating OpenMP code for
/// this runtime but can swallow the pragmas, and find and link against the
/// runtime library itself.
/// The legacy name for the LLVM OpenMP runtime from when it was the Intel
/// OpenMP runtime. We support this mode for users with existing
/// dependencies on this runtime library name.
// Diag - Forwarding function for diagnostics.
DiagnosticBuilder Diag(unsigned DiagID) const {
return Diags.Report(DiagID);
// FIXME: Privatize once interface is stable.
/// The name the driver was invoked as.
std::string Name;
/// The path the driver executable was in, as invoked from the
/// command line.
std::string Dir;
/// The original path to the clang executable.
std::string ClangExecutable;
/// The path to the installed clang directory, if any.
std::string InstalledDir;
/// The path to the compiler resource directory.
std::string ResourceDir;
/// A prefix directory used to emulate a limited subset of GCC's '-Bprefix'
/// functionality.
/// FIXME: This type of customization should be removed in favor of the
/// universal driver when it is ready.
typedef SmallVector<std::string, 4> prefix_list;
prefix_list PrefixDirs;
/// sysroot, if present
std::string SysRoot;
/// Dynamic loader prefix, if present
std::string DyldPrefix;
/// If the standard library is used
bool UseStdLib;
/// Driver title to use with help.
std::string DriverTitle;
/// Information about the host which can be overridden by the user.
std::string HostBits, HostMachine, HostSystem, HostRelease;
/// The file to log CC_PRINT_OPTIONS output to, if enabled.
const char *CCPrintOptionsFilename;
/// The file to log CC_PRINT_HEADERS output to, if enabled.
const char *CCPrintHeadersFilename;
/// The file to log CC_LOG_DIAGNOSTICS output to, if enabled.
const char *CCLogDiagnosticsFilename;
/// A list of inputs and their types for the given arguments.
typedef SmallVector<std::pair<types::ID, const llvm::opt::Arg *>, 16>
/// Whether the driver should follow g++ like behavior.
bool CCCIsCXX() const { return Mode == GXXMode; }
/// Whether the driver is just the preprocessor.
bool CCCIsCPP() const { return Mode == CPPMode; }
/// Whether the driver should follow gcc like behavior.
bool CCCIsCC() const { return Mode == GCCMode; }
/// Whether the driver should follow cl.exe like behavior.
bool IsCLMode() const { return Mode == CLMode; }
/// Only print tool bindings, don't build any jobs.
unsigned CCCPrintBindings : 1;
/// Set CC_PRINT_OPTIONS mode, which is like -v but logs the commands to
/// CCPrintOptionsFilename or to stderr.
unsigned CCPrintOptions : 1;
/// Set CC_PRINT_HEADERS mode, which causes the frontend to log header include
/// information to CCPrintHeadersFilename or to stderr.
unsigned CCPrintHeaders : 1;
/// Set CC_LOG_DIAGNOSTICS mode, which causes the frontend to log diagnostics
/// to CCLogDiagnosticsFilename or to stderr, in a stable machine readable
/// format.
unsigned CCLogDiagnostics : 1;
/// Whether the driver is generating diagnostics for debugging purposes.
unsigned CCGenDiagnostics : 1;
/// Default target triple.
std::string DefaultTargetTriple;
/// Name to use when invoking gcc/g++.
std::string CCCGenericGCCName;
/// Whether to check that input files exist when constructing compilation
/// jobs.
unsigned CheckInputsExist : 1;
/// Use lazy precompiled headers for PCH support.
unsigned CCCUsePCH : 1;
/// Certain options suppress the 'no input files' warning.
unsigned SuppressMissingInputWarning : 1;
std::list<std::string> TempFiles;
std::list<std::string> ResultFiles;
/// \brief Cache of all the ToolChains in use by the driver.
/// This maps from the string representation of a triple to a ToolChain
/// created targeting that triple. The driver owns all the ToolChain objects
/// stored in it, and will clean them up when torn down.
mutable llvm::StringMap<ToolChain *> ToolChains;
/// TranslateInputArgs - Create a new derived argument list from the input
/// arguments, after applying the standard argument translations.
llvm::opt::DerivedArgList *
TranslateInputArgs(const llvm::opt::InputArgList &Args) const;
// getFinalPhase - Determine which compilation mode we are in and record
// which option we used to determine the final phase.
phases::ID getFinalPhase(const llvm::opt::DerivedArgList &DAL,
llvm::opt::Arg **FinalPhaseArg = nullptr) const;
// Before executing jobs, sets up response files for commands that need them.
void setUpResponseFiles(Compilation &C, Command &Cmd);
void generatePrefixedToolNames(StringRef Tool, const ToolChain &TC,
SmallVectorImpl<std::string> &Names) const;
/// \brief Find the appropriate .crash diagonostic file for the child crash
/// under this driver and copy it out to a temporary destination with the
/// other reproducer related files (.sh, .cache, etc). If not found, suggest a
/// directory for the user to look at.
/// \param ReproCrashFilename The file path to copy the .crash to.
/// \param CrashDiagDir The suggested directory for the user to look at
/// in case the search or copy fails.
/// \returns If the .crash is found and successfully copied return true,
/// otherwise false and return the suggested directory in \p CrashDiagDir.
bool getCrashDiagnosticFile(StringRef ReproCrashFilename,
SmallString<128> &CrashDiagDir);
Driver(StringRef ClangExecutable, StringRef DefaultTargetTriple,
DiagnosticsEngine &Diags,
IntrusiveRefCntPtr<vfs::FileSystem> VFS = nullptr);
/// @name Accessors
/// @{
/// Name to use when invoking gcc/g++.
const std::string &getCCCGenericGCCName() const { return CCCGenericGCCName; }
const llvm::opt::OptTable &getOpts() const { return *Opts; }
const DiagnosticsEngine &getDiags() const { return Diags; }
vfs::FileSystem &getVFS() const { return *VFS; }
bool getCheckInputsExist() const { return CheckInputsExist; }
void setCheckInputsExist(bool Value) { CheckInputsExist = Value; }
const std::string &getTitle() { return DriverTitle; }
void setTitle(std::string Value) { DriverTitle = std::move(Value); }
/// \brief Get the path to the main clang executable.
const char *getClangProgramPath() const {
return ClangExecutable.c_str();
/// \brief Get the path to where the clang executable was installed.
const char *getInstalledDir() const {
if (!InstalledDir.empty())
return InstalledDir.c_str();
return Dir.c_str();
void setInstalledDir(StringRef Value) {
InstalledDir = Value;
bool isSaveTempsEnabled() const { return SaveTemps != SaveTempsNone; }
bool isSaveTempsObj() const { return SaveTemps == SaveTempsObj; }
bool embedBitcodeEnabled() const { return BitcodeEmbed != EmbedNone; }
bool embedBitcodeInObject() const {
// LTO has no object file output so ignore embed bitcode option in LTO.
return (BitcodeEmbed == EmbedBitcode) && !isUsingLTO();
bool embedBitcodeMarkerOnly() const {
return (BitcodeEmbed == EmbedMarker) && !isUsingLTO();
/// Compute the desired OpenMP runtime from the flags provided.
OpenMPRuntimeKind getOpenMPRuntime(const llvm::opt::ArgList &Args) const;
/// @}
/// @name Primary Functionality
/// @{
/// CreateOffloadingDeviceToolChains - create all the toolchains required to
/// support offloading devices given the programming models specified in the
/// current compilation. Also, update the host tool chain kind accordingly.
void CreateOffloadingDeviceToolChains(Compilation &C, InputList &Inputs);
/// BuildCompilation - Construct a compilation object for a command
/// line argument vector.
/// \return A compilation, or 0 if none was built for the given
/// argument vector. A null return value does not necessarily
/// indicate an error condition, the diagnostics should be queried
/// to determine if an error occurred.
Compilation *BuildCompilation(ArrayRef<const char *> Args);
/// @name Driver Steps
/// @{
/// ParseDriverMode - Look for and handle the driver mode option in Args.
void ParseDriverMode(StringRef ProgramName, ArrayRef<const char *> Args);
/// ParseArgStrings - Parse the given list of strings into an
/// ArgList.
llvm::opt::InputArgList ParseArgStrings(ArrayRef<const char *> Args);
/// BuildInputs - Construct the list of inputs and their types from
/// the given arguments.
/// \param TC - The default host tool chain.
/// \param Args - The input arguments.
/// \param Inputs - The list to store the resulting compilation
/// inputs onto.
void BuildInputs(const ToolChain &TC, llvm::opt::DerivedArgList &Args,
InputList &Inputs) const;
/// BuildActions - Construct the list of actions to perform for the
/// given arguments, which are only done for a single architecture.
/// \param C - The compilation that is being built.
/// \param Args - The input arguments.
/// \param Actions - The list to store the resulting actions onto.
void BuildActions(Compilation &C, llvm::opt::DerivedArgList &Args,
const InputList &Inputs, ActionList &Actions) const;
/// BuildUniversalActions - Construct the list of actions to perform
/// for the given arguments, which may require a universal build.
/// \param C - The compilation that is being built.
/// \param TC - The default host tool chain.
void BuildUniversalActions(Compilation &C, const ToolChain &TC,
const InputList &BAInputs) const;
/// BuildJobs - Bind actions to concrete tools and translate
/// arguments to form the list of jobs to run.
/// \param C - The compilation that is being built.
void BuildJobs(Compilation &C) const;
/// ExecuteCompilation - Execute the compilation according to the command line
/// arguments and return an appropriate exit code.
/// This routine handles additional processing that must be done in addition
/// to just running the subprocesses, for example reporting errors, setting
/// up response files, removing temporary files, etc.
int ExecuteCompilation(Compilation &C,
SmallVectorImpl< std::pair<int, const Command *> > &FailingCommands);
/// generateCompilationDiagnostics - Generate diagnostics information
/// including preprocessed source file(s).
void generateCompilationDiagnostics(Compilation &C,
const Command &FailingCommand);
/// @}
/// @name Helper Methods
/// @{
/// PrintActions - Print the list of actions.
void PrintActions(const Compilation &C) const;
/// PrintHelp - Print the help text.
/// \param ShowHidden - Show hidden options.
void PrintHelp(bool ShowHidden) const;
/// PrintVersion - Print the driver version.
void PrintVersion(const Compilation &C, raw_ostream &OS) const;
/// GetFilePath - Lookup \p Name in the list of file search paths.
/// \param TC - The tool chain for additional information on
/// directories to search.
// FIXME: This should be in CompilationInfo.
std::string GetFilePath(StringRef Name, const ToolChain &TC) const;
/// GetProgramPath - Lookup \p Name in the list of program search paths.
/// \param TC - The provided tool chain for additional information on
/// directories to search.
// FIXME: This should be in CompilationInfo.
std::string GetProgramPath(StringRef Name, const ToolChain &TC) const;
/// HandleImmediateArgs - Handle any arguments which should be
/// treated before building actions or binding tools.
/// \return Whether any compilation should be built for this
/// invocation.
bool HandleImmediateArgs(const Compilation &C);
/// ConstructAction - Construct the appropriate action to do for
/// \p Phase on the \p Input, taking in to account arguments
/// like -fsyntax-only or --analyze.
Action *ConstructPhaseAction(Compilation &C, const llvm::opt::ArgList &Args,
phases::ID Phase, Action *Input) const;
/// BuildJobsForAction - Construct the jobs to perform for the action \p A and
/// return an InputInfo for the result of running \p A. Will only construct
/// jobs for a given (Action, ToolChain, BoundArch, DeviceKind) tuple once.
BuildJobsForAction(Compilation &C, const Action *A, const ToolChain *TC,
StringRef BoundArch, bool AtTopLevel, bool MultipleArchs,
const char *LinkingOutput,
std::map<std::pair<const Action *, std::string>, InputInfo>
Action::OffloadKind TargetDeviceOffloadKind) const;
/// Returns the default name for linked images (e.g., "a.out").
const char *getDefaultImageName() const;
/// GetNamedOutputPath - Return the name to use for the output of
/// the action \p JA. The result is appended to the compilation's
/// list of temporary or result files, as appropriate.
/// \param C - The compilation.
/// \param JA - The action of interest.
/// \param BaseInput - The original input file that this action was
/// triggered by.
/// \param BoundArch - The bound architecture.
/// \param AtTopLevel - Whether this is a "top-level" action.
/// \param MultipleArchs - Whether multiple -arch options were supplied.
/// \param NormalizedTriple - The normalized triple of the relevant target.
const char *GetNamedOutputPath(Compilation &C, const JobAction &JA,
const char *BaseInput, StringRef BoundArch,
bool AtTopLevel, bool MultipleArchs,
StringRef NormalizedTriple) const;
/// GetTemporaryPath - Return the pathname of a temporary file to use
/// as part of compilation; the file will have the given prefix and suffix.
/// GCC goes to extra lengths here to be a bit more robust.
std::string GetTemporaryPath(StringRef Prefix, StringRef Suffix) const;
/// Return the pathname of the pch file in clang-cl mode.
std::string GetClPchPath(Compilation &C, StringRef BaseName) const;
/// ShouldUseClangCompiler - Should the clang compiler be used to
/// handle this action.
bool ShouldUseClangCompiler(const JobAction &JA) const;
/// Returns true if we are performing any kind of LTO.
bool isUsingLTO() const { return LTOMode != LTOK_None; }
/// Get the specific kind of LTO being performed.
LTOKind getLTOMode() const { return LTOMode; }
/// Set the driver mode (cl, gcc, etc) from an option string of the form
/// --driver-mode=<mode>.
void setDriverModeFromOption(StringRef Opt);
/// Parse the \p Args list for LTO options and record the type of LTO
/// compilation based on which -f(no-)?lto(=.*)? option occurs last.
void setLTOMode(const llvm::opt::ArgList &Args);
/// \brief Retrieves a ToolChain for a particular \p Target triple.
/// Will cache ToolChains for the life of the driver object, and create them
/// on-demand.
const ToolChain &getToolChain(const llvm::opt::ArgList &Args,
const llvm::Triple &Target) const;
/// @}
/// \brief Get bitmasks for which option flags to include and exclude based on
/// the driver mode.
std::pair<unsigned, unsigned> getIncludeExcludeOptionFlagMasks() const;
/// Helper used in BuildJobsForAction. Doesn't use the cache when building
/// jobs specifically for the given action, but will use the cache when
/// building jobs for the Action's inputs.
InputInfo BuildJobsForActionNoCache(
Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
std::map<std::pair<const Action *, std::string>, InputInfo>
Action::OffloadKind TargetDeviceOffloadKind) const;
/// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and
/// return the grouped values as integers. Numbers which are not
/// provided are set to 0.
/// \return True if the entire string was parsed (9.2), or all
/// groups were parsed (10.3.5extrastuff). HadExtra is true if all
/// groups were parsed but extra characters remain at the end.
static bool GetReleaseVersion(StringRef Str, unsigned &Major, unsigned &Minor,
unsigned &Micro, bool &HadExtra);
/// Parse digits from a string \p Str and fulfill \p Digits with
/// the parsed numbers. This method assumes that the max number of
/// digits to look for is equal to Digits.size().
/// \return True if the entire string was parsed and there are
/// no extra characters remaining at the end.
static bool GetReleaseVersion(StringRef Str,
MutableArrayRef<unsigned> Digits);
/// \return True if the last defined optimization level is -Ofast.
/// And False otherwise.
bool isOptimizationLevelFast(const llvm::opt::ArgList &Args);
} // end namespace driver
} // end namespace clang