Coverage Report

Created: 2018-07-19 20:53

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/include/clang/Driver/Driver.h
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//===--- Driver.h - Clang GCC Compatible Driver -----------------*- C++ -*-===//
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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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#ifndef LLVM_CLANG_DRIVER_DRIVER_H
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#define LLVM_CLANG_DRIVER_DRIVER_H
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/LLVM.h"
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#include "clang/Driver/Action.h"
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#include "clang/Driver/Phases.h"
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#include "clang/Driver/ToolChain.h"
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#include "clang/Driver/Types.h"
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#include "clang/Driver/Util.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Support/StringSaver.h"
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#include <list>
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#include <map>
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#include <string>
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namespace llvm {
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class Triple;
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}
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namespace clang {
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namespace vfs {
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class FileSystem;
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}
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namespace driver {
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  class Command;
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  class Compilation;
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  class InputInfo;
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  class JobList;
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  class JobAction;
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  class SanitizerArgs;
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  class ToolChain;
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/// Describes the kind of LTO mode selected via -f(no-)?lto(=.*)? options.
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enum LTOKind {
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  LTOK_None,
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  LTOK_Full,
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  LTOK_Thin,
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  LTOK_Unknown
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};
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/// Driver - Encapsulate logic for constructing compilation processes
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/// from a set of gcc-driver-like command line arguments.
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class Driver {
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  std::unique_ptr<llvm::opt::OptTable> Opts;
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  DiagnosticsEngine &Diags;
63
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  IntrusiveRefCntPtr<vfs::FileSystem> VFS;
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  enum DriverMode {
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    GCCMode,
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    GXXMode,
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    CPPMode,
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    CLMode
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  } Mode;
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  enum SaveTempsMode {
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    SaveTempsNone,
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    SaveTempsCwd,
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    SaveTempsObj
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  } SaveTemps;
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  enum BitcodeEmbedMode {
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    EmbedNone,
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    EmbedMarker,
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    EmbedBitcode
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  } BitcodeEmbed;
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  /// LTO mode selected via -f(no-)?lto(=.*)? options.
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  LTOKind LTOMode;
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public:
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  enum OpenMPRuntimeKind {
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    /// An unknown OpenMP runtime. We can't generate effective OpenMP code
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    /// without knowing what runtime to target.
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    OMPRT_Unknown,
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    /// The LLVM OpenMP runtime. When completed and integrated, this will become
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    /// the default for Clang.
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    OMPRT_OMP,
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    /// The GNU OpenMP runtime. Clang doesn't support generating OpenMP code for
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    /// this runtime but can swallow the pragmas, and find and link against the
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    /// runtime library itself.
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    OMPRT_GOMP,
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    /// The legacy name for the LLVM OpenMP runtime from when it was the Intel
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    /// OpenMP runtime. We support this mode for users with existing
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    /// dependencies on this runtime library name.
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    OMPRT_IOMP5
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  };
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  // Diag - Forwarding function for diagnostics.
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27.9k
  DiagnosticBuilder Diag(unsigned DiagID) const {
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27.9k
    return Diags.Report(DiagID);
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27.9k
  }
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  // FIXME: Privatize once interface is stable.
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public:
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  /// The name the driver was invoked as.
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  std::string Name;
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  /// The path the driver executable was in, as invoked from the
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  /// command line.
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  std::string Dir;
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  /// The original path to the clang executable.
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  std::string ClangExecutable;
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  /// Target and driver mode components extracted from clang executable name.
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  ParsedClangName ClangNameParts;
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  /// The path to the installed clang directory, if any.
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  std::string InstalledDir;
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  /// The path to the compiler resource directory.
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  std::string ResourceDir;
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  /// System directory for config files.
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  std::string SystemConfigDir;
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  /// User directory for config files.
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  std::string UserConfigDir;
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  /// A prefix directory used to emulate a limited subset of GCC's '-Bprefix'
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  /// functionality.
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  /// FIXME: This type of customization should be removed in favor of the
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  /// universal driver when it is ready.
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  typedef SmallVector<std::string, 4> prefix_list;
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  prefix_list PrefixDirs;
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  /// sysroot, if present
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  std::string SysRoot;
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  /// Dynamic loader prefix, if present
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  std::string DyldPrefix;
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  /// Driver title to use with help.
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  std::string DriverTitle;
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  /// Information about the host which can be overridden by the user.
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  std::string HostBits, HostMachine, HostSystem, HostRelease;
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  /// The file to log CC_PRINT_OPTIONS output to, if enabled.
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  const char *CCPrintOptionsFilename;
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  /// The file to log CC_PRINT_HEADERS output to, if enabled.
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  const char *CCPrintHeadersFilename;
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  /// The file to log CC_LOG_DIAGNOSTICS output to, if enabled.
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  const char *CCLogDiagnosticsFilename;
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  /// A list of inputs and their types for the given arguments.
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  typedef SmallVector<std::pair<types::ID, const llvm::opt::Arg *>, 16>
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      InputList;
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  /// Whether the driver should follow g++ like behavior.
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  bool CCCIsCXX() const { return Mode == GXXMode; }
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  /// Whether the driver is just the preprocessor.
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  bool CCCIsCPP() const { return Mode == CPPMode; }
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  /// Whether the driver should follow gcc like behavior.
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  bool CCCIsCC() const { return Mode == GCCMode; }
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  /// Whether the driver should follow cl.exe like behavior.
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  bool IsCLMode() const { return Mode == CLMode; }
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  /// Only print tool bindings, don't build any jobs.
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  unsigned CCCPrintBindings : 1;
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  /// Set CC_PRINT_OPTIONS mode, which is like -v but logs the commands to
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  /// CCPrintOptionsFilename or to stderr.
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  unsigned CCPrintOptions : 1;
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  /// Set CC_PRINT_HEADERS mode, which causes the frontend to log header include
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  /// information to CCPrintHeadersFilename or to stderr.
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  unsigned CCPrintHeaders : 1;
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  /// Set CC_LOG_DIAGNOSTICS mode, which causes the frontend to log diagnostics
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  /// to CCLogDiagnosticsFilename or to stderr, in a stable machine readable
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  /// format.
199
  unsigned CCLogDiagnostics : 1;
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201
  /// Whether the driver is generating diagnostics for debugging purposes.
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  unsigned CCGenDiagnostics : 1;
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private:
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  /// Raw target triple.
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  std::string TargetTriple;
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  /// Name to use when invoking gcc/g++.
209
  std::string CCCGenericGCCName;
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  /// Name of configuration file if used.
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  std::string ConfigFile;
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  /// Allocator for string saver.
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  llvm::BumpPtrAllocator Alloc;
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  /// Object that stores strings read from configuration file.
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  llvm::StringSaver Saver;
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  /// Arguments originated from configuration file.
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  std::unique_ptr<llvm::opt::InputArgList> CfgOptions;
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  /// Arguments originated from command line.
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  std::unique_ptr<llvm::opt::InputArgList> CLOptions;
225
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  /// Whether to check that input files exist when constructing compilation
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  /// jobs.
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  unsigned CheckInputsExist : 1;
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public:
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  /// Use lazy precompiled headers for PCH support.
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  unsigned CCCUsePCH : 1;
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  /// Force clang to emit reproducer for driver invocation. This is enabled
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  /// indirectly by setting FORCE_CLANG_DIAGNOSTICS_CRASH environment variable
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  /// or when using the -gen-reproducer driver flag.
237
  unsigned GenReproducer : 1;
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private:
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  /// Certain options suppress the 'no input files' warning.
241
  unsigned SuppressMissingInputWarning : 1;
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  std::list<std::string> TempFiles;
244
  std::list<std::string> ResultFiles;
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  /// Cache of all the ToolChains in use by the driver.
247
  ///
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  /// This maps from the string representation of a triple to a ToolChain
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  /// created targeting that triple. The driver owns all the ToolChain objects
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  /// stored in it, and will clean them up when torn down.
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  mutable llvm::StringMap<std::unique_ptr<ToolChain>> ToolChains;
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private:
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  /// TranslateInputArgs - Create a new derived argument list from the input
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  /// arguments, after applying the standard argument translations.
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  llvm::opt::DerivedArgList *
257
  TranslateInputArgs(const llvm::opt::InputArgList &Args) const;
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  // getFinalPhase - Determine which compilation mode we are in and record 
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  // which option we used to determine the final phase.
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  phases::ID getFinalPhase(const llvm::opt::DerivedArgList &DAL,
262
                           llvm::opt::Arg **FinalPhaseArg = nullptr) const;
263
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  // Before executing jobs, sets up response files for commands that need them.
265
  void setUpResponseFiles(Compilation &C, Command &Cmd);
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  void generatePrefixedToolNames(StringRef Tool, const ToolChain &TC,
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                                 SmallVectorImpl<std::string> &Names) const;
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  /// Find the appropriate .crash diagonostic file for the child crash
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  /// under this driver and copy it out to a temporary destination with the
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  /// other reproducer related files (.sh, .cache, etc). If not found, suggest a
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  /// directory for the user to look at.
274
  ///
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  /// \param ReproCrashFilename The file path to copy the .crash to.
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  /// \param CrashDiagDir       The suggested directory for the user to look at
277
  ///                           in case the search or copy fails.
278
  ///
279
  /// \returns If the .crash is found and successfully copied return true,
280
  /// otherwise false and return the suggested directory in \p CrashDiagDir.
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  bool getCrashDiagnosticFile(StringRef ReproCrashFilename,
282
                              SmallString<128> &CrashDiagDir);
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public:
285
  Driver(StringRef ClangExecutable, StringRef TargetTriple,
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         DiagnosticsEngine &Diags,
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         IntrusiveRefCntPtr<vfs::FileSystem> VFS = nullptr);
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  /// @name Accessors
290
  /// @{
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  /// Name to use when invoking gcc/g++.
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  const std::string &getCCCGenericGCCName() const { return CCCGenericGCCName; }
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0
  const std::string &getConfigFile() const { return ConfigFile; }
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871k
  const llvm::opt::OptTable &getOpts() const { return *Opts; }
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25.5k
  const DiagnosticsEngine &getDiags() const { return Diags; }
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574k
  vfs::FileSystem &getVFS() const { return *VFS; }
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33.3k
  bool getCheckInputsExist() const { return CheckInputsExist; }
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5.25k
  void setCheckInputsExist(bool Value) { CheckInputsExist = Value; }
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20.8k
  void setTargetAndMode(const ParsedClangName &TM) { ClangNameParts = TM; }
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0
  const std::string &getTitle() { return DriverTitle; }
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0
  void setTitle(std::string Value) { DriverTitle = std::move(Value); }
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28.3k
  std::string getTargetTriple() const { return TargetTriple; }
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  /// Get the path to the main clang executable.
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26.5k
  const char *getClangProgramPath() const {
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26.5k
    return ClangExecutable.c_str();
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26.5k
  }
318
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  /// Get the path to where the clang executable was installed.
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55.0k
  const char *getInstalledDir() const {
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55.0k
    if (!InstalledDir.empty())
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44.5k
      return InstalledDir.c_str();
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10.4k
    return Dir.c_str();
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10.4k
  }
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20.8k
  void setInstalledDir(StringRef Value) {
326
20.8k
    InstalledDir = Value;
327
20.8k
  }
328
329
117k
  bool isSaveTempsEnabled() const { return SaveTemps != SaveTempsNone; }
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283
  bool isSaveTempsObj() const { return SaveTemps == SaveTempsObj; }
331
332
2.54k
  bool embedBitcodeEnabled() const { return BitcodeEmbed != EmbedNone; }
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58.8k
  bool embedBitcodeInObject() const { return (BitcodeEmbed == EmbedBitcode); }
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25.5k
  bool embedBitcodeMarkerOnly() const { return (BitcodeEmbed == EmbedMarker); }
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  /// Compute the desired OpenMP runtime from the flags provided.
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  OpenMPRuntimeKind getOpenMPRuntime(const llvm::opt::ArgList &Args) const;
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  /// @}
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  /// @name Primary Functionality
341
  /// @{
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  /// CreateOffloadingDeviceToolChains - create all the toolchains required to
344
  /// support offloading devices given the programming models specified in the
345
  /// current compilation. Also, update the host tool chain kind accordingly.
346
  void CreateOffloadingDeviceToolChains(Compilation &C, InputList &Inputs);
347
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  /// BuildCompilation - Construct a compilation object for a command
349
  /// line argument vector.
350
  ///
351
  /// \return A compilation, or 0 if none was built for the given
352
  /// argument vector. A null return value does not necessarily
353
  /// indicate an error condition, the diagnostics should be queried
354
  /// to determine if an error occurred.
355
  Compilation *BuildCompilation(ArrayRef<const char *> Args);
356
357
  /// @name Driver Steps
358
  /// @{
359
360
  /// ParseDriverMode - Look for and handle the driver mode option in Args.
361
  void ParseDriverMode(StringRef ProgramName, ArrayRef<const char *> Args);
362
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  /// ParseArgStrings - Parse the given list of strings into an
364
  /// ArgList.
365
  llvm::opt::InputArgList ParseArgStrings(ArrayRef<const char *> Args,
366
                                          bool &ContainsError);
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  /// BuildInputs - Construct the list of inputs and their types from 
369
  /// the given arguments.
370
  ///
371
  /// \param TC - The default host tool chain.
372
  /// \param Args - The input arguments.
373
  /// \param Inputs - The list to store the resulting compilation 
374
  /// inputs onto.
375
  void BuildInputs(const ToolChain &TC, llvm::opt::DerivedArgList &Args,
376
                   InputList &Inputs) const;
377
378
  /// BuildActions - Construct the list of actions to perform for the
379
  /// given arguments, which are only done for a single architecture.
380
  ///
381
  /// \param C - The compilation that is being built.
382
  /// \param Args - The input arguments.
383
  /// \param Actions - The list to store the resulting actions onto.
384
  void BuildActions(Compilation &C, llvm::opt::DerivedArgList &Args,
385
                    const InputList &Inputs, ActionList &Actions) const;
386
387
  /// BuildUniversalActions - Construct the list of actions to perform
388
  /// for the given arguments, which may require a universal build.
389
  ///
390
  /// \param C - The compilation that is being built.
391
  /// \param TC - The default host tool chain.
392
  void BuildUniversalActions(Compilation &C, const ToolChain &TC,
393
                             const InputList &BAInputs) const;
394
395
  /// BuildJobs - Bind actions to concrete tools and translate
396
  /// arguments to form the list of jobs to run.
397
  ///
398
  /// \param C - The compilation that is being built.
399
  void BuildJobs(Compilation &C) const;
400
401
  /// ExecuteCompilation - Execute the compilation according to the command line
402
  /// arguments and return an appropriate exit code.
403
  ///
404
  /// This routine handles additional processing that must be done in addition
405
  /// to just running the subprocesses, for example reporting errors, setting
406
  /// up response files, removing temporary files, etc.
407
  int ExecuteCompilation(Compilation &C,
408
     SmallVectorImpl< std::pair<int, const Command *> > &FailingCommands);
409
410
  /// Contains the files in the compilation diagnostic report generated by
411
  /// generateCompilationDiagnostics.
412
  struct CompilationDiagnosticReport {
413
    llvm::SmallVector<std::string, 4> TemporaryFiles;
414
  };
415
416
  /// generateCompilationDiagnostics - Generate diagnostics information
417
  /// including preprocessed source file(s).
418
  ///
419
  void generateCompilationDiagnostics(
420
      Compilation &C, const Command &FailingCommand,
421
      StringRef AdditionalInformation = "",
422
      CompilationDiagnosticReport *GeneratedReport = nullptr);
423
424
  /// @}
425
  /// @name Helper Methods
426
  /// @{
427
428
  /// PrintActions - Print the list of actions.
429
  void PrintActions(const Compilation &C) const;
430
431
  /// PrintHelp - Print the help text.
432
  ///
433
  /// \param ShowHidden - Show hidden options.
434
  void PrintHelp(bool ShowHidden) const;
435
436
  /// PrintVersion - Print the driver version.
437
  void PrintVersion(const Compilation &C, raw_ostream &OS) const;
438
439
  /// GetFilePath - Lookup \p Name in the list of file search paths.
440
  ///
441
  /// \param TC - The tool chain for additional information on
442
  /// directories to search.
443
  //
444
  // FIXME: This should be in CompilationInfo.
445
  std::string GetFilePath(StringRef Name, const ToolChain &TC) const;
446
447
  /// GetProgramPath - Lookup \p Name in the list of program search paths.
448
  ///
449
  /// \param TC - The provided tool chain for additional information on
450
  /// directories to search.
451
  //
452
  // FIXME: This should be in CompilationInfo.
453
  std::string GetProgramPath(StringRef Name, const ToolChain &TC) const;
454
455
  /// HandleAutocompletions - Handle --autocomplete by searching and printing
456
  /// possible flags, descriptions, and its arguments.
457
  void HandleAutocompletions(StringRef PassedFlags) const;
458
459
  /// HandleImmediateArgs - Handle any arguments which should be
460
  /// treated before building actions or binding tools.
461
  ///
462
  /// \return Whether any compilation should be built for this
463
  /// invocation.
464
  bool HandleImmediateArgs(const Compilation &C);
465
466
  /// ConstructAction - Construct the appropriate action to do for
467
  /// \p Phase on the \p Input, taking in to account arguments
468
  /// like -fsyntax-only or --analyze.
469
  Action *ConstructPhaseAction(
470
      Compilation &C, const llvm::opt::ArgList &Args, phases::ID Phase,
471
      Action *Input,
472
      Action::OffloadKind TargetDeviceOffloadKind = Action::OFK_None) const;
473
474
  /// BuildJobsForAction - Construct the jobs to perform for the action \p A and
475
  /// return an InputInfo for the result of running \p A.  Will only construct
476
  /// jobs for a given (Action, ToolChain, BoundArch, DeviceKind) tuple once.
477
  InputInfo
478
  BuildJobsForAction(Compilation &C, const Action *A, const ToolChain *TC,
479
                     StringRef BoundArch, bool AtTopLevel, bool MultipleArchs,
480
                     const char *LinkingOutput,
481
                     std::map<std::pair<const Action *, std::string>, InputInfo>
482
                         &CachedResults,
483
                     Action::OffloadKind TargetDeviceOffloadKind) const;
484
485
  /// Returns the default name for linked images (e.g., "a.out").
486
  const char *getDefaultImageName() const;
487
488
  /// GetNamedOutputPath - Return the name to use for the output of
489
  /// the action \p JA. The result is appended to the compilation's
490
  /// list of temporary or result files, as appropriate.
491
  ///
492
  /// \param C - The compilation.
493
  /// \param JA - The action of interest.
494
  /// \param BaseInput - The original input file that this action was
495
  /// triggered by.
496
  /// \param BoundArch - The bound architecture. 
497
  /// \param AtTopLevel - Whether this is a "top-level" action.
498
  /// \param MultipleArchs - Whether multiple -arch options were supplied.
499
  /// \param NormalizedTriple - The normalized triple of the relevant target.
500
  const char *GetNamedOutputPath(Compilation &C, const JobAction &JA,
501
                                 const char *BaseInput, StringRef BoundArch,
502
                                 bool AtTopLevel, bool MultipleArchs,
503
                                 StringRef NormalizedTriple) const;
504
505
  /// GetTemporaryPath - Return the pathname of a temporary file to use 
506
  /// as part of compilation; the file will have the given prefix and suffix.
507
  ///
508
  /// GCC goes to extra lengths here to be a bit more robust.
509
  std::string GetTemporaryPath(StringRef Prefix, StringRef Suffix) const;
510
511
  /// Return the pathname of the pch file in clang-cl mode.
512
  std::string GetClPchPath(Compilation &C, StringRef BaseName) const;
513
514
  /// ShouldUseClangCompiler - Should the clang compiler be used to
515
  /// handle this action.
516
  bool ShouldUseClangCompiler(const JobAction &JA) const;
517
518
  /// Returns true if we are performing any kind of LTO.
519
28.0k
  bool isUsingLTO() const { return LTOMode != LTOK_None; }
520
521
  /// Get the specific kind of LTO being performed.
522
66
  LTOKind getLTOMode() const { return LTOMode; }
523
524
private:
525
526
  /// Tries to load options from configuration file.
527
  ///
528
  /// \returns true if error occurred.
529
  bool loadConfigFile();
530
531
  /// Read options from the specified file.
532
  ///
533
  /// \param [in] FileName File to read.
534
  /// \returns true, if error occurred while reading.
535
  bool readConfigFile(StringRef FileName);
536
537
  /// Set the driver mode (cl, gcc, etc) from an option string of the form
538
  /// --driver-mode=<mode>.
539
  void setDriverModeFromOption(StringRef Opt);
540
541
  /// Parse the \p Args list for LTO options and record the type of LTO
542
  /// compilation based on which -f(no-)?lto(=.*)? option occurs last.
543
  void setLTOMode(const llvm::opt::ArgList &Args);
544
545
  /// Retrieves a ToolChain for a particular \p Target triple.
546
  ///
547
  /// Will cache ToolChains for the life of the driver object, and create them
548
  /// on-demand.
549
  const ToolChain &getToolChain(const llvm::opt::ArgList &Args,
550
                                const llvm::Triple &Target) const;
551
552
  /// @}
553
554
  /// Get bitmasks for which option flags to include and exclude based on
555
  /// the driver mode.
556
  std::pair<unsigned, unsigned> getIncludeExcludeOptionFlagMasks() const;
557
558
  /// Helper used in BuildJobsForAction.  Doesn't use the cache when building
559
  /// jobs specifically for the given action, but will use the cache when
560
  /// building jobs for the Action's inputs.
561
  InputInfo BuildJobsForActionNoCache(
562
      Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
563
      bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
564
      std::map<std::pair<const Action *, std::string>, InputInfo>
565
          &CachedResults,
566
      Action::OffloadKind TargetDeviceOffloadKind) const;
567
568
public:
569
  /// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and
570
  /// return the grouped values as integers. Numbers which are not
571
  /// provided are set to 0.
572
  ///
573
  /// \return True if the entire string was parsed (9.2), or all
574
  /// groups were parsed (10.3.5extrastuff). HadExtra is true if all
575
  /// groups were parsed but extra characters remain at the end.
576
  static bool GetReleaseVersion(StringRef Str, unsigned &Major, unsigned &Minor,
577
                                unsigned &Micro, bool &HadExtra);
578
579
  /// Parse digits from a string \p Str and fulfill \p Digits with
580
  /// the parsed numbers. This method assumes that the max number of
581
  /// digits to look for is equal to Digits.size().
582
  ///
583
  /// \return True if the entire string was parsed and there are
584
  /// no extra characters remaining at the end.
585
  static bool GetReleaseVersion(StringRef Str,
586
                                MutableArrayRef<unsigned> Digits);
587
  /// Compute the default -fmodule-cache-path.
588
  static void getDefaultModuleCachePath(SmallVectorImpl<char> &Result);
589
};
590
591
/// \return True if the last defined optimization level is -Ofast.
592
/// And False otherwise.
593
bool isOptimizationLevelFast(const llvm::opt::ArgList &Args);
594
595
} // end namespace driver
596
} // end namespace clang
597
598
#endif