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Editing: Darwin.h

//===--- Darwin.h - Darwin ToolChain Implementations ------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_DARWIN_H
#define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_DARWIN_H

#include "Cuda.h"
#include "ROCm.h"
#include "clang/Driver/DarwinSDKInfo.h"
#include "clang/Driver/Tool.h"
#include "clang/Driver/ToolChain.h"
#include "clang/Driver/XRayArgs.h"

namespace clang {
namespace driver {

namespace toolchains {
class MachO;
} // end namespace toolchains

namespace tools {

namespace darwin {
llvm::Triple::ArchType getArchTypeForMachOArchName(StringRef Str);
void setTripleTypeForMachOArchName(llvm::Triple &T, StringRef Str);

class LLVM_LIBRARY_VISIBILITY MachOTool : public Tool {
  virtual void anchor();

protected:
  void AddMachOArch(const llvm::opt::ArgList &Args,
                    llvm::opt::ArgStringList &CmdArgs) const;

const toolchains::MachO &getMachOToolChain() const {
    return reinterpret_cast<const toolchains::MachO &>(getToolChain());
  }

public:
  MachOTool(const char *Name, const char *ShortName, const ToolChain &TC)
      : Tool(Name, ShortName, TC) {}
};

class LLVM_LIBRARY_VISIBILITY Assembler : public MachOTool {
public:
  Assembler(const ToolChain &TC)
      : MachOTool("darwin::Assembler", "assembler", TC) {}

bool hasIntegratedCPP() const override { return false; }

void ConstructJob(Compilation &C, const JobAction &JA,
                    const InputInfo &Output, const InputInfoList &Inputs,
                    const llvm::opt::ArgList &TCArgs,
                    const char *LinkingOutput) const override;
};

class LLVM_LIBRARY_VISIBILITY Linker : public MachOTool {
  bool NeedsTempPath(const InputInfoList &Inputs) const;
  void AddLinkArgs(Compilation &C, const llvm::opt::ArgList &Args,
                   llvm::opt::ArgStringList &CmdArgs,
                   const InputInfoList &Inputs, unsigned Version[5]) const;

public:
  Linker(const ToolChain &TC) : MachOTool("darwin::Linker", "linker", TC) {}

bool hasIntegratedCPP() const override { return false; }
  bool isLinkJob() const override { return true; }

class LLVM_LIBRARY_VISIBILITY Lipo : public MachOTool {
public:
  Lipo(const ToolChain &TC) : MachOTool("darwin::Lipo", "lipo", TC) {}

bool hasIntegratedCPP() const override { return false; }

class LLVM_LIBRARY_VISIBILITY Dsymutil : public MachOTool {
public:
  Dsymutil(const ToolChain &TC)
      : MachOTool("darwin::Dsymutil", "dsymutil", TC) {}

bool hasIntegratedCPP() const override { return false; }
  bool isDsymutilJob() const override { return true; }

class LLVM_LIBRARY_VISIBILITY VerifyDebug : public MachOTool {
public:
  VerifyDebug(const ToolChain &TC)
      : MachOTool("darwin::VerifyDebug", "dwarfdump", TC) {}

bool hasIntegratedCPP() const override { return false; }

namespace toolchains {

class LLVM_LIBRARY_VISIBILITY MachO : public ToolChain {
protected:
  Tool *buildAssembler() const override;
  Tool *buildLinker() const override;
  Tool *getTool(Action::ActionClass AC) const override;

private:
  mutable std::unique_ptr<tools::darwin::Lipo> Lipo;
  mutable std::unique_ptr<tools::darwin::Dsymutil> Dsymutil;
  mutable std::unique_ptr<tools::darwin::VerifyDebug> VerifyDebug;

public:
  MachO(const Driver &D, const llvm::Triple &Triple,
        const llvm::opt::ArgList &Args);
  ~MachO() override;

/// @name MachO specific toolchain API
  /// {

/// Get the "MachO" arch name for a particular compiler invocation. For
  /// example, Apple treats different ARM variations as distinct architectures.
  StringRef getMachOArchName(const llvm::opt::ArgList &Args) const;

/// Add the linker arguments to link the ARC runtime library.
  virtual void AddLinkARCArgs(const llvm::opt::ArgList &Args,
                              llvm::opt::ArgStringList &CmdArgs) const {}

/// Add the linker arguments to link the compiler runtime library.
  ///
  /// FIXME: This API is intended for use with embedded libraries only, and is
  /// misleadingly named.
  virtual void AddLinkRuntimeLibArgs(const llvm::opt::ArgList &Args,
                                     llvm::opt::ArgStringList &CmdArgs,
                                     bool ForceLinkBuiltinRT = false) const;

virtual void addStartObjectFileArgs(const llvm::opt::ArgList &Args,
                                      llvm::opt::ArgStringList &CmdArgs) const {
  }

virtual void addMinVersionArgs(const llvm::opt::ArgList &Args,
                                 llvm::opt::ArgStringList &CmdArgs) const {}

virtual void addPlatformVersionArgs(const llvm::opt::ArgList &Args,
                                      llvm::opt::ArgStringList &CmdArgs) const {
  }

/// On some iOS platforms, kernel and kernel modules were built statically. Is
  /// this such a target?
  virtual bool isKernelStatic() const { return false; }

/// Is the target either iOS or an iOS simulator?
  bool isTargetIOSBased() const { return false; }

/// Options to control how a runtime library is linked.
  enum RuntimeLinkOptions : unsigned {
    /// Link the library in even if it can't be found in the VFS.
    RLO_AlwaysLink = 1 << 0,

/// Use the embedded runtime from the macho_embedded directory.
    RLO_IsEmbedded = 1 << 1,

/// Emit rpaths for @executable_path as well as the resource directory.
    RLO_AddRPath = 1 << 2,

/// Link the library in before any others.
    RLO_FirstLink = 1 << 3,
  };

/// Add a runtime library to the list of items to link.
  void AddLinkRuntimeLib(const llvm::opt::ArgList &Args,
                         llvm::opt::ArgStringList &CmdArgs, StringRef Component,
                         RuntimeLinkOptions Opts = RuntimeLinkOptions(),
                         bool IsShared = false) const;

/// Add any profiling runtime libraries that are needed. This is essentially a
  /// MachO specific version of addProfileRT in Tools.cpp.
  void addProfileRTLibs(const llvm::opt::ArgList &Args,
                        llvm::opt::ArgStringList &CmdArgs) const override {
    // There aren't any profiling libs for embedded targets currently.
  }

/// }
  /// @name ToolChain Implementation
  /// {

types::ID LookupTypeForExtension(StringRef Ext) const override;

bool HasNativeLLVMSupport() const override;

llvm::opt::DerivedArgList *
  TranslateArgs(const llvm::opt::DerivedArgList &Args, StringRef BoundArch,
                Action::OffloadKind DeviceOffloadKind) const override;

bool IsBlocksDefault() const override {
    // Always allow blocks on Apple; users interested in versioning are
    // expected to use /usr/include/Block.h.
    return true;
  }
  bool IsIntegratedAssemblerDefault() const override {
    // Default integrated assembler to on for Apple's MachO targets.
    return true;
  }

bool IsMathErrnoDefault() const override { return false; }

bool IsEncodeExtendedBlockSignatureDefault() const override { return true; }

bool IsObjCNonFragileABIDefault() const override {
    // Non-fragile ABI is default for everything but i386.
    return getTriple().getArch() != llvm::Triple::x86;
  }

bool UseObjCMixedDispatch() const override { return true; }

bool IsUnwindTablesDefault(const llvm::opt::ArgList &Args) const override;

RuntimeLibType GetDefaultRuntimeLibType() const override {
    return ToolChain::RLT_CompilerRT;
  }

bool isPICDefault() const override;
  bool isPIEDefault() const override;
  bool isPICDefaultForced() const override;

bool SupportsProfiling() const override;

bool UseDwarfDebugFlags() const override;

llvm::ExceptionHandling
  GetExceptionModel(const llvm::opt::ArgList &Args) const override {
    return llvm::ExceptionHandling::None;
  }

virtual StringRef getOSLibraryNameSuffix(bool IgnoreSim = false) const {
    return "";
  }

// Darwin toolchain uses legacy thin LTO API, which is not
  // capable of unit splitting.
  bool canSplitThinLTOUnit() const override { return false; }
  /// }
};

/// Darwin - The base Darwin tool chain.
class LLVM_LIBRARY_VISIBILITY Darwin : public MachO {
public:
  /// Whether the information on the target has been initialized.
  //
  // FIXME: This should be eliminated. What we want to do is make this part of
  // the "default target for arguments" selection process, once we get out of
  // the argument translation business.
  mutable bool TargetInitialized;

enum DarwinPlatformKind {
    MacOS,
    IPhoneOS,
    TvOS,
    WatchOS,
    LastDarwinPlatform = WatchOS
  };
  enum DarwinEnvironmentKind {
    NativeEnvironment,
    Simulator,
  };

mutable DarwinPlatformKind TargetPlatform;
  mutable DarwinEnvironmentKind TargetEnvironment;

/// The OS version we are targeting.
  mutable VersionTuple TargetVersion;

/// The information about the darwin SDK that was used.
  mutable Optional<DarwinSDKInfo> SDKInfo;

CudaInstallationDetector CudaInstallation;
  RocmInstallationDetector RocmInstallation;

private:
  void AddDeploymentTarget(llvm::opt::DerivedArgList &Args) const;

public:
  Darwin(const Driver &D, const llvm::Triple &Triple,
         const llvm::opt::ArgList &Args);
  ~Darwin() override;

std::string ComputeEffectiveClangTriple(const llvm::opt::ArgList &Args,
                                          types::ID InputType) const override;

/// @name Apple Specific Toolchain Implementation
  /// {

void addMinVersionArgs(const llvm::opt::ArgList &Args,
                         llvm::opt::ArgStringList &CmdArgs) const override;

void addPlatformVersionArgs(const llvm::opt::ArgList &Args,
                              llvm::opt::ArgStringList &CmdArgs) const override;

void addStartObjectFileArgs(const llvm::opt::ArgList &Args,
                              llvm::opt::ArgStringList &CmdArgs) const override;

bool isKernelStatic() const override {
    return (!(isTargetIPhoneOS() && !isIPhoneOSVersionLT(6, 0)) &&
            !isTargetWatchOS());
  }

void addProfileRTLibs(const llvm::opt::ArgList &Args,
                        llvm::opt::ArgStringList &CmdArgs) const override;

protected:
  /// }
  /// @name Darwin specific Toolchain functions
  /// {

// FIXME: Eliminate these ...Target functions and derive separate tool chains
  // for these targets and put version in constructor.
  void setTarget(DarwinPlatformKind Platform, DarwinEnvironmentKind Environment,
                 unsigned Major, unsigned Minor, unsigned Micro) const {
    // FIXME: For now, allow reinitialization as long as values don't
    // change. This will go away when we move away from argument translation.
    if (TargetInitialized && TargetPlatform == Platform &&
        TargetEnvironment == Environment &&
        TargetVersion == VersionTuple(Major, Minor, Micro))
      return;

assert(!TargetInitialized && "Target already initialized!");
    TargetInitialized = true;
    TargetPlatform = Platform;
    TargetEnvironment = Environment;
    TargetVersion = VersionTuple(Major, Minor, Micro);
    if (Environment == Simulator)
      const_cast<Darwin *>(this)->setTripleEnvironment(llvm::Triple::Simulator);
  }

public:
  bool isTargetIPhoneOS() const {
    assert(TargetInitialized && "Target not initialized!");
    return (TargetPlatform == IPhoneOS || TargetPlatform == TvOS) &&
           TargetEnvironment == NativeEnvironment;
  }

bool isTargetIOSSimulator() const {
    assert(TargetInitialized && "Target not initialized!");
    return (TargetPlatform == IPhoneOS || TargetPlatform == TvOS) &&
           TargetEnvironment == Simulator;
  }

bool isTargetIOSBased() const {
    assert(TargetInitialized && "Target not initialized!");
    return isTargetIPhoneOS() || isTargetIOSSimulator();
  }

bool isTargetTvOS() const {
    assert(TargetInitialized && "Target not initialized!");
    return TargetPlatform == TvOS && TargetEnvironment == NativeEnvironment;
  }

bool isTargetTvOSSimulator() const {
    assert(TargetInitialized && "Target not initialized!");
    return TargetPlatform == TvOS && TargetEnvironment == Simulator;
  }

bool isTargetTvOSBased() const {
    assert(TargetInitialized && "Target not initialized!");
    return TargetPlatform == TvOS;
  }

bool isTargetWatchOS() const {
    assert(TargetInitialized && "Target not initialized!");
    return TargetPlatform == WatchOS && TargetEnvironment == NativeEnvironment;
  }

bool isTargetWatchOSSimulator() const {
    assert(TargetInitialized && "Target not initialized!");
    return TargetPlatform == WatchOS && TargetEnvironment == Simulator;
  }

bool isTargetWatchOSBased() const {
    assert(TargetInitialized && "Target not initialized!");
    return TargetPlatform == WatchOS;
  }

bool isTargetMacOS() const {
    assert(TargetInitialized && "Target not initialized!");
    return TargetPlatform == MacOS;
  }

bool isTargetMacOSBased() const {
    assert(TargetInitialized && "Target not initialized!");
    // FIXME (Alex L): Add remaining MacCatalyst suppport.
    return TargetPlatform == MacOS;
  }

bool isTargetAppleSiliconMac() const {
    assert(TargetInitialized && "Target not initialized!");
    return isTargetMacOSBased() && getArch() == llvm::Triple::aarch64;
  }

bool isTargetInitialized() const { return TargetInitialized; }

VersionTuple getTargetVersion() const {
    assert(TargetInitialized && "Target not initialized!");
    return TargetVersion;
  }

bool isIPhoneOSVersionLT(unsigned V0, unsigned V1 = 0,
                           unsigned V2 = 0) const {
    assert(isTargetIOSBased() && "Unexpected call for non iOS target!");
    return TargetVersion < VersionTuple(V0, V1, V2);
  }

/// Returns true if the minimum supported macOS version for the slice that's
  /// being built is less than the specified version. If there's no minimum
  /// supported macOS version, the deployment target version is compared to the
  /// specifed version instead.
  bool isMacosxVersionLT(unsigned V0, unsigned V1 = 0, unsigned V2 = 0) const {
    assert(isTargetMacOS() && getTriple().isMacOSX() &&
           "Unexpected call for non OS X target!");
    VersionTuple MinVers = getTriple().getMinimumSupportedOSVersion();
    return (!MinVers.empty() && MinVers > TargetVersion
                ? MinVers
                : TargetVersion) < VersionTuple(V0, V1, V2);
  }

protected:
  /// Return true if c++17 aligned allocation/deallocation functions are not
  /// implemented in the c++ standard library of the deployment target we are
  /// targeting.
  bool isAlignedAllocationUnavailable() const;

void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
                             llvm::opt::ArgStringList &CC1Args,
                             Action::OffloadKind DeviceOffloadKind) const override;

StringRef getPlatformFamily() const;
  StringRef getOSLibraryNameSuffix(bool IgnoreSim = false) const override;

public:
  static StringRef getSDKName(StringRef isysroot);

/// }
  /// @name ToolChain Implementation
  /// {

// Darwin tools support multiple architecture (e.g., i386 and x86_64) and
  // most development is done against SDKs, so compiling for a different
  // architecture should not get any special treatment.
  bool isCrossCompiling() const override { return false; }

llvm::opt::DerivedArgList *
  TranslateArgs(const llvm::opt::DerivedArgList &Args, StringRef BoundArch,
                Action::OffloadKind DeviceOffloadKind) const override;

CXXStdlibType GetDefaultCXXStdlibType() const override;
  ObjCRuntime getDefaultObjCRuntime(bool isNonFragile) const override;
  bool hasBlocksRuntime() const override;

void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs,
                          llvm::opt::ArgStringList &CC1Args) const override;
  void AddHIPIncludeArgs(const llvm::opt::ArgList &DriverArgs,
                         llvm::opt::ArgStringList &CC1Args) const override;

bool UseObjCMixedDispatch() const override {
    // This is only used with the non-fragile ABI and non-legacy dispatch.

// Mixed dispatch is used everywhere except OS X before 10.6.
    return !(isTargetMacOS() && isMacosxVersionLT(10, 6));
  }

unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
    // Stack protectors default to on for user code on 10.5,
    // and for everything in 10.6 and beyond
    if (isTargetIOSBased() || isTargetWatchOSBased())
      return 1;
    else if (isTargetMacOS() && !isMacosxVersionLT(10, 6))
      return 1;
    else if (isTargetMacOS() && !isMacosxVersionLT(10, 5) && !KernelOrKext)
      return 1;

return 0;
  }

void CheckObjCARC() const override;

llvm::ExceptionHandling GetExceptionModel(
      const llvm::opt::ArgList &Args) const override;

bool SupportsEmbeddedBitcode() const override;

SanitizerMask getSupportedSanitizers() const override;

void printVerboseInfo(raw_ostream &OS) const override;
};

/// DarwinClang - The Darwin toolchain used by Clang.
class LLVM_LIBRARY_VISIBILITY DarwinClang : public Darwin {
public:
  DarwinClang(const Driver &D, const llvm::Triple &Triple,
              const llvm::opt::ArgList &Args);

/// @name Apple ToolChain Implementation
  /// {

RuntimeLibType GetRuntimeLibType(const llvm::opt::ArgList &Args) const override;

void AddLinkRuntimeLibArgs(const llvm::opt::ArgList &Args,
                             llvm::opt::ArgStringList &CmdArgs,
                             bool ForceLinkBuiltinRT = false) const override;

void AddClangCXXStdlibIncludeArgs(
      const llvm::opt::ArgList &DriverArgs,
      llvm::opt::ArgStringList &CC1Args) const override;

void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
                                 llvm::opt::ArgStringList &CC1Args) const override;

void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
                           llvm::opt::ArgStringList &CmdArgs) const override;

void AddCCKextLibArgs(const llvm::opt::ArgList &Args,
                        llvm::opt::ArgStringList &CmdArgs) const override;

void addClangWarningOptions(llvm::opt::ArgStringList &CC1Args) const override;

void AddLinkARCArgs(const llvm::opt::ArgList &Args,
                      llvm::opt::ArgStringList &CmdArgs) const override;

unsigned GetDefaultDwarfVersion() const override;
  // Until dtrace (via CTF) and LLDB can deal with distributed debug info,
  // Darwin defaults to standalone/full debug info.
  bool GetDefaultStandaloneDebug() const override { return true; }
  llvm::DebuggerKind getDefaultDebuggerTuning() const override {
    return llvm::DebuggerKind::LLDB;
  }

/// }

private:
  void AddLinkSanitizerLibArgs(const llvm::opt::ArgList &Args,
                               llvm::opt::ArgStringList &CmdArgs,
                               StringRef Sanitizer,
                               bool shared = true) const;

bool AddGnuCPlusPlusIncludePaths(const llvm::opt::ArgList &DriverArgs,
                                   llvm::opt::ArgStringList &CC1Args,
                                   llvm::SmallString<128> Base,
                                   llvm::StringRef Version,
                                   llvm::StringRef ArchDir,
                                   llvm::StringRef BitDir) const;

llvm::StringRef GetHeaderSysroot(const llvm::opt::ArgList &DriverArgs) const;
};

} // end namespace toolchains
} // end namespace driver
} // end namespace clang

#endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_DARWIN_H

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Editing: Darwin.h

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