C++ Disassembler::GetInstructionList方法代码示例

//.........这里部分代码省略.........
    }
    
    if (func_local_addr == LLDB_INVALID_ADDRESS)
    {
        ret.SetErrorToGenericError();
        ret.SetErrorStringWithFormat("Couldn't find function %s for disassembly", name);
        return ret;
    }
    
    if(log)
        log->Printf("Found function, has local address 0x%llx and remote address 0x%llx", (uint64_t)func_local_addr, (uint64_t)func_remote_addr);
    
    std::pair <lldb::addr_t, lldb::addr_t> func_range;
    
    func_range = jit_memory_manager->GetRemoteRangeForLocal(func_local_addr);
    
    if (func_range.first == 0 && func_range.second == 0)
    {
        ret.SetErrorToGenericError();
        ret.SetErrorStringWithFormat("Couldn't find code range for function %s", name);
        return ret;
    }
    
    if(log)
        log->Printf("Function's code range is [0x%llx-0x%llx]", func_range.first, func_range.second);
    
    if (!exe_ctx.target)
    {
        ret.SetErrorToGenericError();
        ret.SetErrorString("Couldn't find the target");
    }
    
    lldb::DataBufferSP buffer_sp(new DataBufferHeap(func_range.second - func_remote_addr, 0));
    
    Error err;
    exe_ctx.process->ReadMemory(func_remote_addr, buffer_sp->GetBytes(), buffer_sp->GetByteSize(), err);
    
    if (!err.Success())
    {
        ret.SetErrorToGenericError();
        ret.SetErrorStringWithFormat("Couldn't read from process: %s", err.AsCString("unknown error"));
        return ret;
    }
    
    ArchSpec arch(exe_ctx.target->GetArchitecture());
    
    Disassembler *disassembler = Disassembler::FindPlugin(arch);
    
    if (disassembler == NULL)
    {
        ret.SetErrorToGenericError();
        ret.SetErrorStringWithFormat("Unable to find disassembler plug-in for %s architecture.", arch.GetArchitectureName());
        return ret;
    }
    
    if (!exe_ctx.process)
    {
        ret.SetErrorToGenericError();
        ret.SetErrorString("Couldn't find the process");
        return ret;
    }
    
    DataExtractor extractor(buffer_sp, 
                            exe_ctx.process->GetByteOrder(),
                            exe_ctx.target->GetArchitecture().GetAddressByteSize());
    
    if (log)
    {
        log->Printf("Function data has contents:");
        extractor.PutToLog (log.get(),
                            0,
                            extractor.GetByteSize(),
                            func_remote_addr,
                            16,
                            DataExtractor::TypeUInt8);
    }
    
    disassembler->DecodeInstructions (Address (NULL, func_remote_addr), extractor, 0, UINT32_MAX);
    
    InstructionList &instruction_list = disassembler->GetInstructionList();
    
    uint32_t bytes_offset = 0;
    
    for (uint32_t instruction_index = 0, num_instructions = instruction_list.GetSize(); 
         instruction_index < num_instructions; 
         ++instruction_index)
    {
        Instruction *instruction = instruction_list.GetInstructionAtIndex(instruction_index).get();
        instruction->Dump (&stream,
                           true,
                           &extractor, 
                           bytes_offset, 
                           &exe_ctx, 
                           true);
        stream.PutChar('\n');
        bytes_offset += instruction->GetByteSize();
    }
    
    return ret;
}

void ThreadPlanAssemblyTracer::Log() {
  Stream *stream = GetLogStream();

  if (!stream)
    return;

  RegisterContext *reg_ctx = m_thread.GetRegisterContext().get();

  lldb::addr_t pc = reg_ctx->GetPC();
  ProcessSP process_sp(m_thread.GetProcess());
  Address pc_addr;
  bool addr_valid = false;
  uint8_t buffer[16] = {0}; // Must be big enough for any single instruction
  addr_valid = process_sp->GetTarget().GetSectionLoadList().ResolveLoadAddress(
      pc, pc_addr);

  pc_addr.Dump(stream, &m_thread, Address::DumpStyleResolvedDescription,
               Address::DumpStyleModuleWithFileAddress);
  stream->PutCString(" ");

  Disassembler *disassembler = GetDisassembler();
  if (disassembler) {
    Status err;
    process_sp->ReadMemory(pc, buffer, sizeof(buffer), err);

    if (err.Success()) {
      DataExtractor extractor(buffer, sizeof(buffer),
                              process_sp->GetByteOrder(),
                              process_sp->GetAddressByteSize());

      bool data_from_file = false;
      if (addr_valid)
        disassembler->DecodeInstructions(pc_addr, extractor, 0, 1, false,
                                         data_from_file);
      else
        disassembler->DecodeInstructions(Address(pc), extractor, 0, 1, false,
                                         data_from_file);

      InstructionList &instruction_list = disassembler->GetInstructionList();
      const uint32_t max_opcode_byte_size =
          instruction_list.GetMaxOpcocdeByteSize();

      if (instruction_list.GetSize()) {
        const bool show_bytes = true;
        const bool show_address = true;
        Instruction *instruction =
            instruction_list.GetInstructionAtIndex(0).get();
        const FormatEntity::Entry *disassemble_format =
            m_thread.GetProcess()
                ->GetTarget()
                .GetDebugger()
                .GetDisassemblyFormat();
        instruction->Dump(stream, max_opcode_byte_size, show_address,
                          show_bytes, nullptr, nullptr, nullptr,
                          disassemble_format, 0);
      }
    }
  }

  const ABI *abi = process_sp->GetABI().get();
  TypeFromUser intptr_type = GetIntPointerType();

  if (abi && intptr_type.IsValid()) {
    ValueList value_list;
    const int num_args = 1;

    for (int arg_index = 0; arg_index < num_args; ++arg_index) {
      Value value;
      value.SetValueType(Value::eValueTypeScalar);
      //            value.SetContext (Value::eContextTypeClangType,
      //            intptr_type.GetOpaqueQualType());
      value.SetCompilerType(intptr_type);
      value_list.PushValue(value);
    }

    if (abi->GetArgumentValues(m_thread, value_list)) {
      for (int arg_index = 0; arg_index < num_args; ++arg_index) {
        stream->Printf(
            "\n\targ[%d]=%llx", arg_index,
            value_list.GetValueAtIndex(arg_index)->GetScalar().ULongLong());

        if (arg_index + 1 < num_args)
          stream->PutCString(", ");
      }
    }
  }

  RegisterValue reg_value;
  for (uint32_t reg_num = 0, num_registers = reg_ctx->GetRegisterCount();
       reg_num < num_registers; ++reg_num) {
    const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex(reg_num);
    if (reg_ctx->ReadRegister(reg_info, reg_value)) {
      assert(reg_num < m_register_values.size());
      if (m_register_values[reg_num].GetType() == RegisterValue::eTypeInvalid ||
          reg_value != m_register_values[reg_num]) {
        if (reg_value.GetType() != RegisterValue::eTypeInvalid) {
          stream->PutCString("\n\t");
          reg_value.Dump(stream, reg_info, true, false, eFormatDefault);
        }
      }
//.........这里部分代码省略.........

bool
Disassembler::Disassemble
(
    Debugger &debugger,
    const ArchSpec &arch,
    const ExecutionContext &exe_ctx,
    const AddressRange &disasm_range,
    uint32_t num_mixed_context_lines,
    bool show_bytes,
    Stream &strm
)
{
    if (disasm_range.GetByteSize())
    {
        Disassembler *disassembler = Disassembler::FindPlugin(arch);

        if (disassembler)
        {
            AddressRange range(disasm_range);
            
            Process *process = exe_ctx.process;

            // If we weren't passed in a section offset address range,
            // try and resolve it to something
            if (range.GetBaseAddress().IsSectionOffset() == false)
            {
                if (process && process->IsAlive())
                {
                    process->ResolveLoadAddress (range.GetBaseAddress().GetOffset(), range.GetBaseAddress());
                }
                else if (exe_ctx.target)
                {
                    exe_ctx.target->GetImages().ResolveFileAddress (range.GetBaseAddress().GetOffset(), range.GetBaseAddress());
                }
            }


            DataExtractor data;
            size_t bytes_disassembled = disassembler->ParseInstructions (&exe_ctx, range, data);
            if (bytes_disassembled == 0)
            {
                return false;
            }
            else
            {
                // We got some things disassembled...
                size_t num_instructions = disassembler->GetInstructionList().GetSize();
                uint32_t offset = 0;
                SymbolContext sc;
                SymbolContext prev_sc;
                AddressRange sc_range;
                if (num_mixed_context_lines)
                    strm.IndentMore ();


                Address addr(range.GetBaseAddress());
    
                // We extract the section to make sure we don't transition out
                // of the current section when disassembling
                const Section *addr_section = addr.GetSection();
                Module *range_module = range.GetBaseAddress().GetModule();

                for (size_t i=0; i<num_instructions; ++i)
                {
                    Disassembler::Instruction *inst = disassembler->GetInstructionList().GetInstructionAtIndex (i);
                    if (inst)
                    {
                        addr_t file_addr = addr.GetFileAddress();
                        if (addr_section == NULL || addr_section->ContainsFileAddress (file_addr) == false)
                        {
                            if (range_module)
                                range_module->ResolveFileAddress (file_addr, addr);
                            else if (exe_ctx.target)
                                exe_ctx.target->GetImages().ResolveFileAddress (file_addr, addr);
                                
                            addr_section = addr.GetSection();
                        }

                        prev_sc = sc;

                        if (addr_section)
                        {
                            Module *module = addr_section->GetModule();
                            uint32_t resolved_mask = module->ResolveSymbolContextForAddress(addr, eSymbolContextEverything, sc);
                            if (resolved_mask)
                            {
                                if (prev_sc.function != sc.function || prev_sc.symbol != sc.symbol)
                                {
                                    if (prev_sc.function || prev_sc.symbol)
                                        strm.EOL();

                                    strm << sc.module_sp->GetFileSpec().GetFilename();
                                    
                                    if (sc.function)
                                        strm << '`' << sc.function->GetMangled().GetName();
                                    else if (sc.symbol)
                                        strm << '`' << sc.symbol->GetMangled().GetName();
                                    strm << ":\n";
                                }

//.........这里部分代码省略.........