C++ ArchSpec::GetTriple方法代码示例

//------------------------------------------------------------------
// Static Functions
//------------------------------------------------------------------
ABISP
ABIMacOSX_arm::CreateInstance (const ArchSpec &arch)
{
    static ABISP g_abi_sp;
    const llvm::Triple::ArchType arch_type = arch.GetTriple().getArch();
    if ((arch_type == llvm::Triple::arm) ||
            (arch_type == llvm::Triple::thumb))
    {
        if (!g_abi_sp)
            g_abi_sp.reset (new ABIMacOSX_arm);
        return g_abi_sp;
    }
    return ABISP();
}

bool PlatformAppleTVSimulator::GetSupportedArchitectureAtIndex(uint32_t idx,
                                                               ArchSpec &arch) {
  static const ArchSpec platform_arch(
      HostInfo::GetArchitecture(HostInfo::eArchKind64));

  if (idx == 0) {
    arch = platform_arch;
    if (arch.IsValid()) {
      arch.GetTriple().setOS(llvm::Triple::TvOS);
      return true;
    }
  }
  return false;
}

//------------------------------------------------------------------
// Static Functions
//------------------------------------------------------------------
ABISP
ABISysV_mips::CreateInstance (const ArchSpec &arch)
{
    static ABISP g_abi_sp;
    const llvm::Triple::ArchType arch_type = arch.GetTriple().getArch();
    if ((arch_type == llvm::Triple::mips) ||
        (arch_type == llvm::Triple::mipsel))
    {
        if (!g_abi_sp)
            g_abi_sp.reset (new ABISysV_mips);
        return g_abi_sp;
    }
    return ABISP();
}

bool PlatformOpenBSD::GetSupportedArchitectureAtIndex(uint32_t idx,
						      ArchSpec &arch) {
  if (IsHost()) {
    ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
    if (hostArch.GetTriple().isOSOpenBSD()) {
      if (idx == 0) {
        arch = hostArch;
        return arch.IsValid();
      }
    }
  } else {
    if (m_remote_platform_sp)
      return m_remote_platform_sp->GetSupportedArchitectureAtIndex(idx, arch);

    llvm::Triple triple;
    // Set the OS to OpenBSD
    triple.setOS(llvm::Triple::OpenBSD);
    // Set the architecture
    switch (idx) {
    case 0:
      triple.setArchName("x86_64");
      break;
    case 1:
      triple.setArchName("i386");
      break;
    case 2:
      triple.setArchName("aarch64");
      break;
    case 3:
      triple.setArchName("arm");
      break;
    default:
      return false;
    }
    // Leave the vendor as "llvm::Triple:UnknownVendor" and don't specify the
    // vendor by
    // calling triple.SetVendorName("unknown") so that it is a "unspecified
    // unknown".
    // This means when someone calls triple.GetVendorName() it will return an
    // empty string
    // which indicates that the vendor can be set when two architectures are
    // merged

    // Now set the triple into "arch" and return true
    arch.SetTriple(triple);
    return true;
  }
  return false;
}

PlatformSP 
OptionGroupPlatform::CreatePlatformWithOptions (CommandInterpreter &interpreter,
                                                const ArchSpec &arch,
                                                bool make_selected,
                                                Error& error,
                                                ArchSpec &platform_arch) const
{
    PlatformSP platform_sp;
    
    if (!m_platform_name.empty())
    {
        platform_sp = Platform::Create (ConstString(m_platform_name.c_str()), error);
        if (platform_sp)
        {
            if (platform_arch.IsValid() && !platform_sp->IsCompatibleArchitecture(arch, false, &platform_arch))
            {
                error.SetErrorStringWithFormat ("platform '%s' doesn't support '%s'",
                                                platform_sp->GetName().GetCString(),
                                                arch.GetTriple().getTriple().c_str());
                platform_sp.reset();
                return platform_sp;
            }
        }
    }
    else if (arch.IsValid())
    {
        platform_sp = Platform::Create (arch, &platform_arch, error);
    }
    
    if (platform_sp)
    {
        interpreter.GetDebugger().GetPlatformList().Append (platform_sp, make_selected);
        if (m_os_version_major != UINT32_MAX)
        {
            platform_sp->SetOSVersion (m_os_version_major,
                                       m_os_version_minor,
                                       m_os_version_update);
        }
        
        if (m_sdk_sysroot)
            platform_sp->SetSDKRootDirectory (m_sdk_sysroot);
        
        if (m_sdk_build)
            platform_sp->SetSDKBuild (m_sdk_build);
    }

    return platform_sp;
}

bool
PlatformLinux::GetSupportedArchitectureAtIndex (uint32_t idx, ArchSpec &arch)
{
    if (idx == 0)
    {
        arch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
        return arch.IsValid();
    }
    else if (idx == 1)
    {
        // If the default host architecture is 64-bit, look for a 32-bit variant
        ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
        if (hostArch.IsValid() && hostArch.GetTriple().isArch64Bit())
        {
            arch = HostInfo::GetArchitecture(HostInfo::eArchKind32);
            return arch.IsValid();
        }
    }
    return false;
}

TEST(ArchSpecTest, TestParseMachCPUDashSubtypeTripleExtra) {
  ArchSpec AS;
  EXPECT_TRUE(ParseMachCPUDashSubtypeTriple("12-15-vendor-os", AS));
  EXPECT_EQ(12u, AS.GetMachOCPUType());
  EXPECT_EQ(15u, AS.GetMachOCPUSubType());
  EXPECT_EQ("vendor", AS.GetTriple().getVendorName());
  EXPECT_EQ("os", AS.GetTriple().getOSName());

  AS = ArchSpec();
  EXPECT_TRUE(ParseMachCPUDashSubtypeTriple("12-10-vendor-os-name", AS));
  EXPECT_EQ(12u, AS.GetMachOCPUType());
  EXPECT_EQ(10u, AS.GetMachOCPUSubType());
  EXPECT_EQ("vendor", AS.GetTriple().getVendorName());
  EXPECT_EQ("os", AS.GetTriple().getOSName());

  AS = ArchSpec();
  EXPECT_TRUE(ParseMachCPUDashSubtypeTriple("12-15-vendor.os-name", AS));
  EXPECT_EQ(12u, AS.GetMachOCPUType());
  EXPECT_EQ(15u, AS.GetMachOCPUSubType());
  EXPECT_EQ("vendor.os", AS.GetTriple().getVendorName());
  EXPECT_EQ("name", AS.GetTriple().getOSName());

  // These there should parse correctly, but the vendor / OS should be defaulted
  // since they are unrecognized.
  AS = ArchSpec();
  EXPECT_TRUE(ParseMachCPUDashSubtypeTriple("12-10-vendor", AS));
  EXPECT_EQ(12u, AS.GetMachOCPUType());
  EXPECT_EQ(10u, AS.GetMachOCPUSubType());
  EXPECT_EQ("apple", AS.GetTriple().getVendorName());
  EXPECT_EQ("", AS.GetTriple().getOSName());

  AS = ArchSpec();
  EXPECT_FALSE(ParseMachCPUDashSubtypeTriple("12.10.10", AS));

  AS = ArchSpec();
  EXPECT_FALSE(ParseMachCPUDashSubtypeTriple("12-10.10", AS));
}

lldb::UnixSignalsSP UnixSignals::Create(const ArchSpec &arch) {
  const auto &triple = arch.GetTriple();
  switch (triple.getOS()) {
  case llvm::Triple::Linux: {
    switch (triple.getArch()) {
    case llvm::Triple::mips:
    case llvm::Triple::mipsel:
    case llvm::Triple::mips64:
    case llvm::Triple::mips64el:
      return std::make_shared<MipsLinuxSignals>();
    default:
      return std::make_shared<LinuxSignals>();
    }
  }
  case llvm::Triple::FreeBSD:
  case llvm::Triple::OpenBSD:
    return std::make_shared<FreeBSDSignals>();
  case llvm::Triple::NetBSD:
    return std::make_shared<NetBSDSignals>();
  default:
    return std::make_shared<UnixSignals>();
  }
}

DisassemblerLLVMC::DisassemblerLLVMC (const ArchSpec &arch, const char *flavor_string) :
    Disassembler(arch, flavor_string),
    m_exe_ctx (NULL),
    m_inst (NULL),
    m_data_from_file (false)
{
    if (!FlavorValidForArchSpec (arch, m_flavor.c_str()))
    {
        m_flavor.assign("default");
    }
    
    const char *triple = arch.GetTriple().getTriple().c_str();
    unsigned flavor = ~0U;
    
    // So far the only supported flavor is "intel" on x86.  The base class will set this
    // correctly coming in.
    if (arch.GetTriple().getArch() == llvm::Triple::x86
        || arch.GetTriple().getArch() == llvm::Triple::x86_64)
    {
        if (m_flavor == "intel")
        {
            flavor = 1;
        }
        else if (m_flavor == "att")
        {
            flavor = 0;
        }
    }
    
    ArchSpec thumb_arch(arch);
    if (arch.GetTriple().getArch() == llvm::Triple::arm)
    {
        std::string thumb_arch_name (thumb_arch.GetTriple().getArchName().str());
        // Replace "arm" with "thumb" so we get all thumb variants correct
        if (thumb_arch_name.size() > 3)
        {
            thumb_arch_name.erase(0,3);
            thumb_arch_name.insert(0, "thumb");
        }
        else
        {
            thumb_arch_name = "thumbv7";
        }
        thumb_arch.GetTriple().setArchName(llvm::StringRef(thumb_arch_name.c_str()));
    }
    
    // Cortex-M3 devices (e.g. armv7m) can only execute thumb (T2) instructions, 
    // so hardcode the primary disassembler to thumb mode.  Same for Cortex-M4 (armv7em).
    //
    // Handle the Cortex-M0 (armv6m) the same; the ISA is a subset of the T and T32
    // instructions defined in ARMv7-A.  

    if (arch.GetTriple().getArch() == llvm::Triple::arm
        && (arch.GetCore() == ArchSpec::Core::eCore_arm_armv7m 
            || arch.GetCore() == ArchSpec::Core::eCore_arm_armv7em
            || arch.GetCore() == ArchSpec::Core::eCore_arm_armv6m))
    {
        triple = thumb_arch.GetTriple().getTriple().c_str();
    }

    m_disasm_ap.reset (new LLVMCDisassembler(triple, flavor, *this));
    if (!m_disasm_ap->IsValid())
    {
        // We use m_disasm_ap.get() to tell whether we are valid or not, so if this isn't good for some reason,
        // we reset it, and then we won't be valid and FindPlugin will fail and we won't get used.
        m_disasm_ap.reset();
    }

    // For arm CPUs that can execute arm or thumb instructions, also create a thumb instruction disassembler.
    if (arch.GetTriple().getArch() == llvm::Triple::arm)
    {
        std::string thumb_triple(thumb_arch.GetTriple().getTriple());
        m_alternate_disasm_ap.reset(new LLVMCDisassembler(thumb_triple.c_str(), flavor, *this));
        if (!m_alternate_disasm_ap->IsValid())
        {
            m_disasm_ap.reset();
            m_alternate_disasm_ap.reset();
        }
    }
}

RegisterContextSP
ThreadElfCore::CreateRegisterContextForFrame (StackFrame *frame)
{
    RegisterContextSP reg_ctx_sp;
    uint32_t concrete_frame_idx = 0;
    Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD));

    if (frame)
        concrete_frame_idx = frame->GetConcreteFrameIndex ();

    if (concrete_frame_idx == 0)
    {
        if (m_thread_reg_ctx_sp)
            return m_thread_reg_ctx_sp;

        ProcessElfCore *process = static_cast<ProcessElfCore *>(GetProcess().get());
        ArchSpec arch = process->GetArchitecture();
        RegisterInfoInterface *reg_interface = NULL;

        switch (arch.GetTriple().getOS())
        {
            case llvm::Triple::FreeBSD:
            {
                switch (arch.GetMachine())
                {
                    case llvm::Triple::mips64:
                        reg_interface = new RegisterContextFreeBSD_mips64(arch);
                        break;
                    case llvm::Triple::x86:
                        reg_interface = new RegisterContextFreeBSD_i386(arch);
                        break;
                    case llvm::Triple::x86_64:
                        reg_interface = new RegisterContextFreeBSD_x86_64(arch);
                        break;
                    default:
                        break;
                }
                break;
            }
 
            case llvm::Triple::Linux:
            {
                switch (arch.GetMachine())
                {
                    case llvm::Triple::x86_64:
                        reg_interface = new RegisterContextLinux_x86_64(arch);
                        break;
                    default:
                        break;
                }
                break;
            }

            default:
                break;
        }

        if (!reg_interface) {
            if (log)
                log->Printf ("elf-core::%s:: Architecture(%d) or OS(%d) not supported",
                             __FUNCTION__, arch.GetMachine(), arch.GetTriple().getOS());
                assert (false && "Architecture or OS not supported");
        }

        switch (arch.GetMachine())
        {
            case llvm::Triple::mips64:
                m_thread_reg_ctx_sp.reset(new RegisterContextCorePOSIX_mips64 (*this, reg_interface, m_gpregset_data, m_fpregset_data));
                break;
            case llvm::Triple::x86:
            case llvm::Triple::x86_64:
                m_thread_reg_ctx_sp.reset(new RegisterContextCorePOSIX_x86_64 (*this, reg_interface, m_gpregset_data, m_fpregset_data));
                break;
            default:
                break;
        }

        reg_ctx_sp = m_thread_reg_ctx_sp;
    }
    else if (m_unwinder_ap.get())
    {
        reg_ctx_sp = m_unwinder_ap->CreateRegisterContextForFrame (frame);
    }
    return reg_ctx_sp;
}

bool
ArchSpec::Compare (const ArchSpec& rhs, bool exact_match) const
{
    if (GetByteOrder() != rhs.GetByteOrder())
        return false;
        
    const ArchSpec::Core lhs_core = GetCore ();
    const ArchSpec::Core rhs_core = rhs.GetCore ();

    const bool core_match = cores_match (lhs_core, rhs_core, true, exact_match);

    if (core_match)
    {
        const llvm::Triple &lhs_triple = GetTriple();
        const llvm::Triple &rhs_triple = rhs.GetTriple();

        const llvm::Triple::VendorType lhs_triple_vendor = lhs_triple.getVendor();
        const llvm::Triple::VendorType rhs_triple_vendor = rhs_triple.getVendor();
        if (lhs_triple_vendor != rhs_triple_vendor)
        {
            const bool rhs_vendor_specified = rhs.TripleVendorWasSpecified();
            const bool lhs_vendor_specified = TripleVendorWasSpecified();
            // Both architectures had the vendor specified, so if they aren't
            // equal then we return false
            if (rhs_vendor_specified && lhs_vendor_specified)
                return false;
            
            // Only fail if both vendor types are not unknown
            if (lhs_triple_vendor != llvm::Triple::UnknownVendor &&
                rhs_triple_vendor != llvm::Triple::UnknownVendor)
                return false;
        }
        
        const llvm::Triple::OSType lhs_triple_os = lhs_triple.getOS();
        const llvm::Triple::OSType rhs_triple_os = rhs_triple.getOS();
        if (lhs_triple_os != rhs_triple_os)
        {
            const bool rhs_os_specified = rhs.TripleOSWasSpecified();
            const bool lhs_os_specified = TripleOSWasSpecified();
            // Both architectures had the OS specified, so if they aren't
            // equal then we return false
            if (rhs_os_specified && lhs_os_specified)
                return false;
            // Only fail if both os types are not unknown
            if (lhs_triple_os != llvm::Triple::UnknownOS &&
                rhs_triple_os != llvm::Triple::UnknownOS)
                return false;
        }

        const llvm::Triple::EnvironmentType lhs_triple_env = lhs_triple.getEnvironment();
        const llvm::Triple::EnvironmentType rhs_triple_env = rhs_triple.getEnvironment();
            
        if (lhs_triple_env != rhs_triple_env)
        {
            // Only fail if both environment types are not unknown
            if (lhs_triple_env != llvm::Triple::UnknownEnvironment &&
                rhs_triple_env != llvm::Triple::UnknownEnvironment)
                return false;
        }
        return true;
    }
    return false;
}

RegisterContextSP
ThreadMinidump::CreateRegisterContextForFrame(StackFrame *frame) {
  RegisterContextSP reg_ctx_sp;
  uint32_t concrete_frame_idx = 0;

  if (frame)
    concrete_frame_idx = frame->GetConcreteFrameIndex();

  if (concrete_frame_idx == 0) {
    if (m_thread_reg_ctx_sp)
      return m_thread_reg_ctx_sp;

    ProcessMinidump *process =
        static_cast<ProcessMinidump *>(GetProcess().get());
    ArchSpec arch = process->GetArchitecture();
    RegisterInfoInterface *reg_interface = nullptr;

    // TODO write other register contexts and add them here
    switch (arch.GetMachine()) {
    case llvm::Triple::x86: {
      reg_interface = new RegisterContextLinux_i386(arch);
      lldb::DataBufferSP buf =
          ConvertMinidumpContext_x86_32(m_gpregset_data, reg_interface);
      DataExtractor gpregset(buf, lldb::eByteOrderLittle, 4);
      m_thread_reg_ctx_sp.reset(new RegisterContextCorePOSIX_x86_64(
          *this, reg_interface, gpregset, {}));
      break;
    }
    case llvm::Triple::x86_64: {
      reg_interface = new RegisterContextLinux_x86_64(arch);
      lldb::DataBufferSP buf =
          ConvertMinidumpContext_x86_64(m_gpregset_data, reg_interface);
      DataExtractor gpregset(buf, lldb::eByteOrderLittle, 8);
      m_thread_reg_ctx_sp.reset(new RegisterContextCorePOSIX_x86_64(
          *this, reg_interface, gpregset, {}));
      break;
    }
    case llvm::Triple::aarch64: {
      DataExtractor data(m_gpregset_data.data(), m_gpregset_data.size(),
                         lldb::eByteOrderLittle, 8);
      m_thread_reg_ctx_sp.reset(new RegisterContextMinidump_ARM64(*this, data));
      break;
    }
    case llvm::Triple::arm: {
      DataExtractor data(m_gpregset_data.data(), m_gpregset_data.size(),
                         lldb::eByteOrderLittle, 8);
      const bool apple = arch.GetTriple().getVendor() == llvm::Triple::Apple;
      m_thread_reg_ctx_sp.reset(
          new RegisterContextMinidump_ARM(*this, data, apple));
      break;
    }
    default:
      break;
    }

    reg_ctx_sp = m_thread_reg_ctx_sp;
  } else if (m_unwinder_ap) {
    reg_ctx_sp = m_unwinder_ap->CreateRegisterContextForFrame(frame);
  }

  return reg_ctx_sp;
}

//.........这里部分代码省略.........
    if (m_invalidate_regs_map.find(i) != m_invalidate_regs_map.end())
      m_regs[i].invalidate_regs = m_invalidate_regs_map[i].data();
    else
      m_regs[i].invalidate_regs = NULL;
  }

  // Check if we need to automatically set the generic registers in case
  // they weren't set
  bool generic_regs_specified = false;
  for (const auto &reg : m_regs) {
    if (reg.kinds[eRegisterKindGeneric] != LLDB_INVALID_REGNUM) {
      generic_regs_specified = true;
      break;
    }
  }

  if (!generic_regs_specified) {
    switch (arch.GetMachine()) {
    case llvm::Triple::aarch64:
    case llvm::Triple::aarch64_be:
      for (auto &reg : m_regs) {
        if (strcmp(reg.name, "pc") == 0)
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC;
        else if ((strcmp(reg.name, "fp") == 0) ||
                 (strcmp(reg.name, "x29") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP;
        else if ((strcmp(reg.name, "lr") == 0) ||
                 (strcmp(reg.name, "x30") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_RA;
        else if ((strcmp(reg.name, "sp") == 0) ||
                 (strcmp(reg.name, "x31") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP;
        else if (strcmp(reg.name, "cpsr") == 0)
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FLAGS;
      }
      break;

    case llvm::Triple::arm:
    case llvm::Triple::armeb:
    case llvm::Triple::thumb:
    case llvm::Triple::thumbeb:
      for (auto &reg : m_regs) {
        if ((strcmp(reg.name, "pc") == 0) || (strcmp(reg.name, "r15") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC;
        else if ((strcmp(reg.name, "sp") == 0) ||
                 (strcmp(reg.name, "r13") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP;
        else if ((strcmp(reg.name, "lr") == 0) ||
                 (strcmp(reg.name, "r14") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_RA;
        else if ((strcmp(reg.name, "r7") == 0) &&
                 arch.GetTriple().getVendor() == llvm::Triple::Apple)
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP;
        else if ((strcmp(reg.name, "r11") == 0) &&
                 arch.GetTriple().getVendor() != llvm::Triple::Apple)
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP;
        else if (strcmp(reg.name, "fp") == 0)
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP;
        else if (strcmp(reg.name, "cpsr") == 0)
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FLAGS;
      }
      break;

    case llvm::Triple::x86:
      for (auto &reg : m_regs) {
        if ((strcmp(reg.name, "eip") == 0) || (strcmp(reg.name, "pc") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC;
        else if ((strcmp(reg.name, "esp") == 0) ||
                 (strcmp(reg.name, "sp") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP;
        else if ((strcmp(reg.name, "ebp") == 0) ||
                 (strcmp(reg.name, "fp") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP;
        else if ((strcmp(reg.name, "eflags") == 0) ||
                 (strcmp(reg.name, "flags") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FLAGS;
      }
      break;

    case llvm::Triple::x86_64:
      for (auto &reg : m_regs) {
        if ((strcmp(reg.name, "rip") == 0) || (strcmp(reg.name, "pc") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC;
        else if ((strcmp(reg.name, "rsp") == 0) ||
                 (strcmp(reg.name, "sp") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP;
        else if ((strcmp(reg.name, "rbp") == 0) ||
                 (strcmp(reg.name, "fp") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP;
        else if ((strcmp(reg.name, "rflags") == 0) ||
                 (strcmp(reg.name, "flags") == 0))
          reg.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FLAGS;
      }
      break;

    default:
      break;
    }
  }
}