Coverage Report

Created: 2019-02-20 07:29

/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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// 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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#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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namespace vfs {
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class FileSystem;
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}
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} // namespace llvm
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namespace clang {
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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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60
  DiagnosticsEngine &Diags;
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  IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS;
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64
  enum DriverMode {
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    GCCMode,
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    GXXMode,
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    CPPMode,
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    CLMode
69
  } Mode;
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  enum SaveTempsMode {
72
    SaveTempsNone,
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    SaveTempsCwd,
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    SaveTempsObj
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  } SaveTemps;
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77
  enum BitcodeEmbedMode {
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    EmbedNone,
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    EmbedMarker,
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    EmbedBitcode
81
  } 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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19.9k
  DiagnosticBuilder Diag(unsigned DiagID) const {
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19.9k
    return Diags.Report(DiagID);
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19.9k
  }
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112
  // FIXME: Privatize once interface is stable.
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public:
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  /// The name the driver was invoked as.
115
  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
147
  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>
169
      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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58.6k
  bool CCCIsCPP() const { return Mode == CPPMode; }
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  /// Whether the driver should follow gcc like behavior.
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5.22k
  bool CCCIsCC() const { return Mode == GCCMode; }
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  /// Whether the driver should follow cl.exe like behavior.
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243k
  bool IsCLMode() const { return Mode == CLMode; }
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  /// Only print tool bindings, don't build any jobs.
184
  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
191
  /// information to CCPrintHeadersFilename or to stderr.
192
  unsigned CCPrintHeaders : 1;
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  /// Set CC_LOG_DIAGNOSTICS mode, which causes the frontend to log diagnostics
195
  /// to CCLogDiagnosticsFilename or to stderr, in a stable machine readable
196
  /// format.
197
  unsigned CCLogDiagnostics : 1;
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199
  /// Whether the driver is generating diagnostics for debugging purposes.
200
  unsigned CCGenDiagnostics : 1;
201
202
private:
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  /// Raw target triple.
204
  std::string TargetTriple;
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  /// Name to use when invoking gcc/g++.
207
  std::string CCCGenericGCCName;
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  /// Name of configuration file if used.
210
  std::string ConfigFile;
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  /// Allocator for string saver.
213
  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.
222
  std::unique_ptr<llvm::opt::InputArgList> CLOptions;
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  /// Whether to check that input files exist when constructing compilation
225
  /// jobs.
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  unsigned CheckInputsExist : 1;
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public:
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  /// Force clang to emit reproducer for driver invocation. This is enabled
230
  /// indirectly by setting FORCE_CLANG_DIAGNOSTICS_CRASH environment variable
231
  /// or when using the -gen-reproducer driver flag.
232
  unsigned GenReproducer : 1;
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private:
235
  /// Certain options suppress the 'no input files' warning.
236
  unsigned SuppressMissingInputWarning : 1;
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238
  std::list<std::string> TempFiles;
239
  std::list<std::string> ResultFiles;
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  /// Cache of all the ToolChains in use by the driver.
242
  ///
243
  /// This maps from the string representation of a triple to a ToolChain
244
  /// created targeting that triple. The driver owns all the ToolChain objects
245
  /// 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
250
  /// arguments, after applying the standard argument translations.
251
  llvm::opt::DerivedArgList *
252
  TranslateInputArgs(const llvm::opt::InputArgList &Args) const;
253
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  // getFinalPhase - Determine which compilation mode we are in and record
255
  // which option we used to determine the final phase.
256
  phases::ID getFinalPhase(const llvm::opt::DerivedArgList &DAL,
257
                           llvm::opt::Arg **FinalPhaseArg = nullptr) const;
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  // Before executing jobs, sets up response files for commands that need them.
260
  void setUpResponseFiles(Compilation &C, Command &Cmd);
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  void generatePrefixedToolNames(StringRef Tool, const ToolChain &TC,
263
                                 SmallVectorImpl<std::string> &Names) const;
264
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  /// Find the appropriate .crash diagonostic file for the child crash
266
  /// 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.
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  ///
270
  /// \param ReproCrashFilename The file path to copy the .crash to.
271
  /// \param CrashDiagDir       The suggested directory for the user to look at
272
  ///                           in case the search or copy fails.
273
  ///
274
  /// \returns If the .crash is found and successfully copied return true,
275
  /// otherwise false and return the suggested directory in \p CrashDiagDir.
276
  bool getCrashDiagnosticFile(StringRef ReproCrashFilename,
277
                              SmallString<128> &CrashDiagDir);
278
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public:
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  /// Takes the path to a binary that's either in bin/ or lib/ and returns
282
  /// the path to clang's resource directory.
283
  static std::string GetResourcesPath(StringRef BinaryPath,
284
                                      StringRef CustomResourceDir = "");
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  Driver(StringRef ClangExecutable, StringRef TargetTriple,
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         DiagnosticsEngine &Diags,
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         IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS = nullptr);
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  /// @name Accessors
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  /// @{
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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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885k
  const llvm::opt::OptTable &getOpts() const { return *Opts; }
299
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27.8k
  const DiagnosticsEngine &getDiags() const { return Diags; }
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874k
  llvm::vfs::FileSystem &getVFS() const { return *VFS; }
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35.9k
  bool getCheckInputsExist() const { return CheckInputsExist; }
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1.13k
  void setCheckInputsExist(bool Value) { CheckInputsExist = Value; }
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21.6k
  void setTargetAndMode(const ParsedClangName &TM) { ClangNameParts = TM; }
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310
0
  const std::string &getTitle() { return DriverTitle; }
311
  void setTitle(std::string Value) { DriverTitle = std::move(Value); }
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313
29.9k
  std::string getTargetTriple() const { return TargetTriple; }
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315
  /// Get the path to the main clang executable.
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28.8k
  const char *getClangProgramPath() const {
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28.8k
    return ClangExecutable.c_str();
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28.8k
  }
319
320
  /// Get the path to where the clang executable was installed.
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67.1k
  const char *getInstalledDir() const {
322
67.1k
    if (!InstalledDir.empty())
323
49.8k
      return InstalledDir.c_str();
324
17.3k
    return Dir.c_str();
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17.3k
  }
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21.6k
  void setInstalledDir(StringRef Value) {
327
21.6k
    InstalledDir = Value;
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21.6k
  }
329
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128k
  bool isSaveTempsEnabled() const { return SaveTemps != SaveTempsNone; }
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295
  bool isSaveTempsObj() const { return SaveTemps == SaveTempsObj; }
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20.4k
  bool embedBitcodeEnabled() const { return BitcodeEmbed != EmbedNone; }
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64.0k
  bool embedBitcodeInObject() const { return (BitcodeEmbed == EmbedBitcode); }
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45.7k
  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;
339
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  /// @}
341
  /// @name Primary Functionality
342
  /// @{
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  /// CreateOffloadingDeviceToolChains - create all the toolchains required to
345
  /// support offloading devices given the programming models specified in the
346
  /// current compilation. Also, update the host tool chain kind accordingly.
347
  void CreateOffloadingDeviceToolChains(Compilation &C, InputList &Inputs);
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  /// BuildCompilation - Construct a compilation object for a command
350
  /// line argument vector.
351
  ///
352
  /// \return A compilation, or 0 if none was built for the given
353
  /// argument vector. A null return value does not necessarily
354
  /// indicate an error condition, the diagnostics should be queried
355
  /// to determine if an error occurred.
356
  Compilation *BuildCompilation(ArrayRef<const char *> Args);
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  /// @name Driver Steps
359
  /// @{
360
361
  /// ParseDriverMode - Look for and handle the driver mode option in Args.
362
  void ParseDriverMode(StringRef ProgramName, ArrayRef<const char *> Args);
363
364
  /// ParseArgStrings - Parse the given list of strings into an
365
  /// ArgList.
366
  llvm::opt::InputArgList ParseArgStrings(ArrayRef<const char *> Args,
367
                                          bool IsClCompatMode,
368
                                          bool &ContainsError);
369
370
  /// BuildInputs - Construct the list of inputs and their types from
371
  /// the given arguments.
372
  ///
373
  /// \param TC - The default host tool chain.
374
  /// \param Args - The input arguments.
375
  /// \param Inputs - The list to store the resulting compilation
376
  /// inputs onto.
377
  void BuildInputs(const ToolChain &TC, llvm::opt::DerivedArgList &Args,
378
                   InputList &Inputs) const;
379
380
  /// BuildActions - Construct the list of actions to perform for the
381
  /// given arguments, which are only done for a single architecture.
382
  ///
383
  /// \param C - The compilation that is being built.
384
  /// \param Args - The input arguments.
385
  /// \param Actions - The list to store the resulting actions onto.
386
  void BuildActions(Compilation &C, llvm::opt::DerivedArgList &Args,
387
                    const InputList &Inputs, ActionList &Actions) const;
388
389
  /// BuildUniversalActions - Construct the list of actions to perform
390
  /// for the given arguments, which may require a universal build.
391
  ///
392
  /// \param C - The compilation that is being built.
393
  /// \param TC - The default host tool chain.
394
  void BuildUniversalActions(Compilation &C, const ToolChain &TC,
395
                             const InputList &BAInputs) const;
396
397
  /// BuildJobs - Bind actions to concrete tools and translate
398
  /// arguments to form the list of jobs to run.
399
  ///
400
  /// \param C - The compilation that is being built.
401
  void BuildJobs(Compilation &C) const;
402
403
  /// ExecuteCompilation - Execute the compilation according to the command line
404
  /// arguments and return an appropriate exit code.
405
  ///
406
  /// This routine handles additional processing that must be done in addition
407
  /// to just running the subprocesses, for example reporting errors, setting
408
  /// up response files, removing temporary files, etc.
409
  int ExecuteCompilation(Compilation &C,
410
     SmallVectorImpl< std::pair<int, const Command *> > &FailingCommands);
411
412
  /// Contains the files in the compilation diagnostic report generated by
413
  /// generateCompilationDiagnostics.
414
  struct CompilationDiagnosticReport {
415
    llvm::SmallVector<std::string, 4> TemporaryFiles;
416
  };
417
418
  /// generateCompilationDiagnostics - Generate diagnostics information
419
  /// including preprocessed source file(s).
420
  ///
421
  void generateCompilationDiagnostics(
422
      Compilation &C, const Command &FailingCommand,
423
      StringRef AdditionalInformation = "",
424
      CompilationDiagnosticReport *GeneratedReport = nullptr);
425
426
  /// @}
427
  /// @name Helper Methods
428
  /// @{
429
430
  /// PrintActions - Print the list of actions.
431
  void PrintActions(const Compilation &C) const;
432
433
  /// PrintHelp - Print the help text.
434
  ///
435
  /// \param ShowHidden - Show hidden options.
436
  void PrintHelp(bool ShowHidden) const;
437
438
  /// PrintVersion - Print the driver version.
439
  void PrintVersion(const Compilation &C, raw_ostream &OS) const;
440
441
  /// GetFilePath - Lookup \p Name in the list of file search paths.
442
  ///
443
  /// \param TC - The tool chain for additional information on
444
  /// directories to search.
445
  //
446
  // FIXME: This should be in CompilationInfo.
447
  std::string GetFilePath(StringRef Name, const ToolChain &TC) const;
448
449
  /// GetProgramPath - Lookup \p Name in the list of program search paths.
450
  ///
451
  /// \param TC - The provided tool chain for additional information on
452
  /// directories to search.
453
  //
454
  // FIXME: This should be in CompilationInfo.
455
  std::string GetProgramPath(StringRef Name, const ToolChain &TC) const;
456
457
  /// HandleAutocompletions - Handle --autocomplete by searching and printing
458
  /// possible flags, descriptions, and its arguments.
459
  void HandleAutocompletions(StringRef PassedFlags) const;
460
461
  /// HandleImmediateArgs - Handle any arguments which should be
462
  /// treated before building actions or binding tools.
463
  ///
464
  /// \return Whether any compilation should be built for this
465
  /// invocation.
466
  bool HandleImmediateArgs(const Compilation &C);
467
468
  /// ConstructAction - Construct the appropriate action to do for
469
  /// \p Phase on the \p Input, taking in to account arguments
470
  /// like -fsyntax-only or --analyze.
471
  Action *ConstructPhaseAction(
472
      Compilation &C, const llvm::opt::ArgList &Args, phases::ID Phase,
473
      Action *Input,
474
      Action::OffloadKind TargetDeviceOffloadKind = Action::OFK_None) const;
475
476
  /// BuildJobsForAction - Construct the jobs to perform for the action \p A and
477
  /// return an InputInfo for the result of running \p A.  Will only construct
478
  /// jobs for a given (Action, ToolChain, BoundArch, DeviceKind) tuple once.
479
  InputInfo
480
  BuildJobsForAction(Compilation &C, const Action *A, const ToolChain *TC,
481
                     StringRef BoundArch, bool AtTopLevel, bool MultipleArchs,
482
                     const char *LinkingOutput,
483
                     std::map<std::pair<const Action *, std::string>, InputInfo>
484
                         &CachedResults,
485
                     Action::OffloadKind TargetDeviceOffloadKind) const;
486
487
  /// Returns the default name for linked images (e.g., "a.out").
488
  const char *getDefaultImageName() const;
489
490
  /// GetNamedOutputPath - Return the name to use for the output of
491
  /// the action \p JA. The result is appended to the compilation's
492
  /// list of temporary or result files, as appropriate.
493
  ///
494
  /// \param C - The compilation.
495
  /// \param JA - The action of interest.
496
  /// \param BaseInput - The original input file that this action was
497
  /// triggered by.
498
  /// \param BoundArch - The bound architecture.
499
  /// \param AtTopLevel - Whether this is a "top-level" action.
500
  /// \param MultipleArchs - Whether multiple -arch options were supplied.
501
  /// \param NormalizedTriple - The normalized triple of the relevant target.
502
  const char *GetNamedOutputPath(Compilation &C, const JobAction &JA,
503
                                 const char *BaseInput, StringRef BoundArch,
504
                                 bool AtTopLevel, bool MultipleArchs,
505
                                 StringRef NormalizedTriple) const;
506
507
  /// GetTemporaryPath - Return the pathname of a temporary file to use
508
  /// as part of compilation; the file will have the given prefix and suffix.
509
  ///
510
  /// GCC goes to extra lengths here to be a bit more robust.
511
  std::string GetTemporaryPath(StringRef Prefix, StringRef Suffix) const;
512
513
  /// GetTemporaryDirectory - Return the pathname of a temporary directory to
514
  /// use as part of compilation; the directory will have the given prefix.
515
  std::string GetTemporaryDirectory(StringRef Prefix) const;
516
517
  /// Return the pathname of the pch file in clang-cl mode.
518
  std::string GetClPchPath(Compilation &C, StringRef BaseName) const;
519
520
  /// ShouldUseClangCompiler - Should the clang compiler be used to
521
  /// handle this action.
522
  bool ShouldUseClangCompiler(const JobAction &JA) const;
523
524
  /// Returns true if we are performing any kind of LTO.
525
30.7k
  bool isUsingLTO() const { return LTOMode != LTOK_None; }
526
527
  /// Get the specific kind of LTO being performed.
528
93
  LTOKind getLTOMode() const { return LTOMode; }
529
530
private:
531
532
  /// Tries to load options from configuration file.
533
  ///
534
  /// \returns true if error occurred.
535
  bool loadConfigFile();
536
537
  /// Read options from the specified file.
538
  ///
539
  /// \param [in] FileName File to read.
540
  /// \returns true, if error occurred while reading.
541
  bool readConfigFile(StringRef FileName);
542
543
  /// Set the driver mode (cl, gcc, etc) from an option string of the form
544
  /// --driver-mode=<mode>.
545
  void setDriverModeFromOption(StringRef Opt);
546
547
  /// Parse the \p Args list for LTO options and record the type of LTO
548
  /// compilation based on which -f(no-)?lto(=.*)? option occurs last.
549
  void setLTOMode(const llvm::opt::ArgList &Args);
550
551
  /// Retrieves a ToolChain for a particular \p Target triple.
552
  ///
553
  /// Will cache ToolChains for the life of the driver object, and create them
554
  /// on-demand.
555
  const ToolChain &getToolChain(const llvm::opt::ArgList &Args,
556
                                const llvm::Triple &Target) const;
557
558
  /// @}
559
560
  /// Get bitmasks for which option flags to include and exclude based on
561
  /// the driver mode.
562
  std::pair<unsigned, unsigned> getIncludeExcludeOptionFlagMasks(bool IsClCompatMode) const;
563
564
  /// Helper used in BuildJobsForAction.  Doesn't use the cache when building
565
  /// jobs specifically for the given action, but will use the cache when
566
  /// building jobs for the Action's inputs.
567
  InputInfo BuildJobsForActionNoCache(
568
      Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
569
      bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
570
      std::map<std::pair<const Action *, std::string>, InputInfo>
571
          &CachedResults,
572
      Action::OffloadKind TargetDeviceOffloadKind) const;
573
574
public:
575
  /// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and
576
  /// return the grouped values as integers. Numbers which are not
577
  /// provided are set to 0.
578
  ///
579
  /// \return True if the entire string was parsed (9.2), or all
580
  /// groups were parsed (10.3.5extrastuff). HadExtra is true if all
581
  /// groups were parsed but extra characters remain at the end.
582
  static bool GetReleaseVersion(StringRef Str, unsigned &Major, unsigned &Minor,
583
                                unsigned &Micro, bool &HadExtra);
584
585
  /// Parse digits from a string \p Str and fulfill \p Digits with
586
  /// the parsed numbers. This method assumes that the max number of
587
  /// digits to look for is equal to Digits.size().
588
  ///
589
  /// \return True if the entire string was parsed and there are
590
  /// no extra characters remaining at the end.
591
  static bool GetReleaseVersion(StringRef Str,
592
                                MutableArrayRef<unsigned> Digits);
593
  /// Compute the default -fmodule-cache-path.
594
  static void getDefaultModuleCachePath(SmallVectorImpl<char> &Result);
595
};
596
597
/// \return True if the last defined optimization level is -Ofast.
598
/// And False otherwise.
599
bool isOptimizationLevelFast(const llvm::opt::ArgList &Args);
600
601
} // end namespace driver
602
} // end namespace clang
603
604
#endif