C++ DiagnosticManager类代码示例

FunctionCaller *
UtilityFunction::MakeFunctionCaller (const CompilerType &return_type, const ValueList &arg_value_list, lldb::ThreadSP thread_to_use_sp, Error &error)
{
    if (m_caller_up)
        return m_caller_up.get();
    
    ProcessSP process_sp = m_jit_process_wp.lock();
    if (!process_sp)
    {
        error.SetErrorString("Can't make a function caller without a process.");
        return nullptr;
    }
    
    Address impl_code_address;
    impl_code_address.SetOffset(StartAddress());
    std::string name(m_function_name);
    name.append("-caller");
    
    m_caller_up.reset (process_sp->GetTarget().GetFunctionCallerForLanguage (Language(),
                                                                             return_type,
                                                                             impl_code_address,
                                                                             arg_value_list,
                                                                             name.c_str(),
                                                                             error));
    if (error.Fail())
    {
        
        return nullptr;
    }
    if (m_caller_up)
    {
        DiagnosticManager diagnostics;

        unsigned num_errors = m_caller_up->CompileFunction(thread_to_use_sp, diagnostics);
        if (num_errors)
        {
            error.SetErrorStringWithFormat("Error compiling %s caller function: \"%s\".", m_function_name.c_str(),
                                           diagnostics.GetString().c_str());
            m_caller_up.reset();
            return nullptr;
        }

        diagnostics.Clear();
        ExecutionContext exe_ctx(process_sp);

        if (!m_caller_up->WriteFunctionWrapper(exe_ctx, diagnostics))
        {
            error.SetErrorStringWithFormat("Error inserting caller function for %s: \"%s\".", m_function_name.c_str(),
                                           diagnostics.GetString().c_str());
            m_caller_up.reset();
            return nullptr;
        }
    }
    return m_caller_up.get();
}

lldb::ExpressionResults
GoUserExpression::DoExecute(DiagnosticManager &diagnostic_manager,
                            ExecutionContext &exe_ctx,
                            const EvaluateExpressionOptions &options,
                            lldb::UserExpressionSP &shared_ptr_to_me,
                            lldb::ExpressionVariableSP &result) {
  Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_EXPRESSIONS |
                                                  LIBLLDB_LOG_STEP));

  lldb_private::ExecutionPolicy execution_policy = options.GetExecutionPolicy();
  lldb::ExpressionResults execution_results = lldb::eExpressionSetupError;

  Process *process = exe_ctx.GetProcessPtr();
  Target *target = exe_ctx.GetTargetPtr();

  if (target == nullptr || process == nullptr ||
      process->GetState() != lldb::eStateStopped) {
    if (execution_policy == eExecutionPolicyAlways) {
      if (log)
        log->Printf("== [GoUserExpression::Evaluate] Expression may not run, "
                    "but is not constant ==");

      diagnostic_manager.PutCString(eDiagnosticSeverityError,
                                    "expression needed to run but couldn't");

      return execution_results;
    }
  }

  m_interpreter->set_use_dynamic(options.GetUseDynamic());
  ValueObjectSP result_val_sp = m_interpreter->Evaluate(exe_ctx);
  Error err = m_interpreter->error();
  m_interpreter.reset();

  if (!result_val_sp) {
    const char *error_cstr = err.AsCString();
    if (error_cstr && error_cstr[0])
      diagnostic_manager.PutCString(eDiagnosticSeverityError, error_cstr);
    else
      diagnostic_manager.PutCString(eDiagnosticSeverityError,
                                    "expression can't be interpreted or run");
    return lldb::eExpressionDiscarded;
  }
  result.reset(new ExpressionVariable(ExpressionVariable::eKindGo));
  result->m_live_sp = result->m_frozen_sp = result_val_sp;
  result->m_flags |= ExpressionVariable::EVIsProgramReference;
  PersistentExpressionState *pv =
      target->GetPersistentExpressionStateForLanguage(eLanguageTypeGo);
  if (pv != nullptr) {
    result->SetName(pv->GetNextPersistentVariableName());
    pv->AddVariable(result);
  }
  return lldb::eExpressionCompleted;
}

bool
GoUserExpression::Parse(DiagnosticManager &diagnostic_manager, ExecutionContext &exe_ctx, lldb_private::ExecutionPolicy execution_policy,
                        bool keep_result_in_memory, bool generate_debug_info, uint32_t line_offset)
{
    InstallContext(exe_ctx);
    m_interpreter.reset(new GoInterpreter(exe_ctx, GetUserText()));
    if (m_interpreter->Parse())
        return true;
    const char *error_cstr = m_interpreter->error().AsCString();
    if (error_cstr && error_cstr[0])
        diagnostic_manager.PutCString(eDiagnosticSeverityError, error_cstr);
    else
        diagnostic_manager.Printf(eDiagnosticSeverityError, "expression can't be interpreted or run");
    return false;
}

lldb::ThreadPlanSP
FunctionCaller::GetThreadPlanToCallFunction(ExecutionContext &exe_ctx, lldb::addr_t args_addr,
                                            const EvaluateExpressionOptions &options,
                                            DiagnosticManager &diagnostic_manager)
{
    Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_EXPRESSIONS | LIBLLDB_LOG_STEP));

    if (log)
        log->Printf("-- [FunctionCaller::GetThreadPlanToCallFunction] Creating thread plan to call function \"%s\" --", m_name.c_str());
    
    // FIXME: Use the errors Stream for better error reporting.
    Thread *thread = exe_ctx.GetThreadPtr();
    if (thread == NULL)
    {
        diagnostic_manager.PutCString(eDiagnosticSeverityError, "Can't call a function without a valid thread.");
        return NULL;
    }

    // Okay, now run the function:

    Address wrapper_address (m_jit_start_addr);
    
    lldb::addr_t args = { args_addr };
    
    lldb::ThreadPlanSP new_plan_sp (new ThreadPlanCallFunction (*thread,
                                                       wrapper_address,
                                                       CompilerType(),
                                                       args,
                                                       options));
    new_plan_sp->SetIsMasterPlan(true);
    new_plan_sp->SetOkayToDiscard (false);
    return new_plan_sp;
}

bool ClangUserExpression::PrepareForParsing(
    DiagnosticManager &diagnostic_manager, ExecutionContext &exe_ctx) {
  InstallContext(exe_ctx);

  if (!SetupPersistentState(diagnostic_manager, exe_ctx))
    return false;

  Status err;
  ScanContext(exe_ctx, err);

  if (!err.Success()) {
    diagnostic_manager.PutString(eDiagnosticSeverityWarning, err.AsCString());
  }

  ////////////////////////////////////
  // Generate the expression
  //

  ApplyObjcCastHack(m_expr_text);

  SetupDeclVendor(exe_ctx, m_target);

  UpdateLanguageForExpr(diagnostic_manager, exe_ctx);
  return true;
}

bool ClangUserExpression::SetupPersistentState(DiagnosticManager &diagnostic_manager,
                                 ExecutionContext &exe_ctx) {
  if (Target *target = exe_ctx.GetTargetPtr()) {
    if (PersistentExpressionState *persistent_state =
            target->GetPersistentExpressionStateForLanguage(
                lldb::eLanguageTypeC)) {
      m_result_delegate.RegisterPersistentState(persistent_state);
    } else {
      diagnostic_manager.PutString(
          eDiagnosticSeverityError,
          "couldn't start parsing (no persistent data)");
      return false;
    }
  } else {
    diagnostic_manager.PutString(eDiagnosticSeverityError,
                                 "error: couldn't start parsing (no target)");
    return false;
  }
  return true;
}

bool LLVMUserExpression::FinalizeJITExecution(
    DiagnosticManager &diagnostic_manager, ExecutionContext &exe_ctx,
    lldb::ExpressionVariableSP &result, lldb::addr_t function_stack_bottom,
    lldb::addr_t function_stack_top) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));

  if (log)
    log->Printf("-- [UserExpression::FinalizeJITExecution] Dematerializing "
                "after execution --");

  if (!m_dematerializer_sp) {
    diagnostic_manager.Printf(eDiagnosticSeverityError,
                              "Couldn't apply expression side effects : no "
                              "dematerializer is present");
    return false;
  }

  Error dematerialize_error;

  m_dematerializer_sp->Dematerialize(dematerialize_error, function_stack_bottom,
                                     function_stack_top);

  if (!dematerialize_error.Success()) {
    diagnostic_manager.Printf(eDiagnosticSeverityError,
                              "Couldn't apply expression side effects : %s",
                              dematerialize_error.AsCString("unknown error"));
    return false;
  }

  result =
      GetResultAfterDematerialization(exe_ctx.GetBestExecutionContextScope());

  if (result)
    result->TransferAddress();

  m_dematerializer_sp.reset();

  return true;
}

void ClangUserExpression::UpdateLanguageForExpr(
    DiagnosticManager &diagnostic_manager, ExecutionContext &exe_ctx) {
  m_expr_lang = lldb::LanguageType::eLanguageTypeUnknown;

  std::string prefix = m_expr_prefix;

  if (m_options.GetExecutionPolicy() == eExecutionPolicyTopLevel) {
    m_transformed_text = m_expr_text;
  } else {
    std::unique_ptr<ExpressionSourceCode> source_code(
        ExpressionSourceCode::CreateWrapped(prefix.c_str(),
                                            m_expr_text.c_str()));

    if (m_in_cplusplus_method)
      m_expr_lang = lldb::eLanguageTypeC_plus_plus;
    else if (m_in_objectivec_method)
      m_expr_lang = lldb::eLanguageTypeObjC;
    else
      m_expr_lang = lldb::eLanguageTypeC;

    if (!source_code->GetText(m_transformed_text, m_expr_lang,
                              m_in_static_method, exe_ctx)) {
      diagnostic_manager.PutString(eDiagnosticSeverityError,
                                   "couldn't construct expression body");
      return;
    }

    // Find and store the start position of the original code inside the
    // transformed code. We need this later for the code completion.
    std::size_t original_start;
    std::size_t original_end;
    bool found_bounds = source_code->GetOriginalBodyBounds(
        m_transformed_text, m_expr_lang, original_start, original_end);
    if (found_bounds) {
      m_user_expression_start_pos = original_start;
    }
  }
}

bool
FunctionCaller::WriteFunctionArguments(ExecutionContext &exe_ctx, lldb::addr_t &args_addr_ref, ValueList &arg_values,
                                       DiagnosticManager &diagnostic_manager)
{
    // All the information to reconstruct the struct is provided by the
    // StructExtractor.
    if (!m_struct_valid)
    {
        diagnostic_manager.PutCString(
            eDiagnosticSeverityError,
            "Argument information was not correctly parsed, so the function cannot be called.");
        return false;
    }

    Error error;
    lldb::ExpressionResults return_value = lldb::eExpressionSetupError;

    Process *process = exe_ctx.GetProcessPtr();

    if (process == NULL)
        return return_value;

    lldb::ProcessSP jit_process_sp(m_jit_process_wp.lock());
    
    if (process != jit_process_sp.get())
        return false;
                
    if (args_addr_ref == LLDB_INVALID_ADDRESS)
    {
        args_addr_ref = process->AllocateMemory(m_struct_size, lldb::ePermissionsReadable|lldb::ePermissionsWritable, error);
        if (args_addr_ref == LLDB_INVALID_ADDRESS)
            return false;
        m_wrapper_args_addrs.push_back (args_addr_ref);
    } 
    else 
    {
        // Make sure this is an address that we've already handed out.
        if (find (m_wrapper_args_addrs.begin(), m_wrapper_args_addrs.end(), args_addr_ref) == m_wrapper_args_addrs.end())
        {
            return false;
        }
    }

    // TODO: verify fun_addr needs to be a callable address
    Scalar fun_addr (m_function_addr.GetCallableLoadAddress(exe_ctx.GetTargetPtr()));
    uint64_t first_offset = m_member_offsets[0];
    process->WriteScalarToMemory(args_addr_ref + first_offset, fun_addr, process->GetAddressByteSize(), error);

    // FIXME: We will need to extend this for Variadic functions.

    Error value_error;

    size_t num_args = arg_values.GetSize();
    if (num_args != m_arg_values.GetSize())
    {
        diagnostic_manager.Printf(eDiagnosticSeverityError,
                                  "Wrong number of arguments - was: %" PRIu64 " should be: %" PRIu64 "",
                                  (uint64_t)num_args, (uint64_t)m_arg_values.GetSize());
        return false;
    }

    for (size_t i = 0; i < num_args; i++)
    {
        // FIXME: We should sanity check sizes.

        uint64_t offset = m_member_offsets[i+1]; // Clang sizes are in bytes.
        Value *arg_value = arg_values.GetValueAtIndex(i);
        
        // FIXME: For now just do scalars:
        
        // Special case: if it's a pointer, don't do anything (the ABI supports passing cstrings)
        
        if (arg_value->GetValueType() == Value::eValueTypeHostAddress &&
            arg_value->GetContextType() == Value::eContextTypeInvalid &&
            arg_value->GetCompilerType().IsPointerType())
            continue;
        
        const Scalar &arg_scalar = arg_value->ResolveValue(&exe_ctx);

        if (!process->WriteScalarToMemory(args_addr_ref + offset, arg_scalar, arg_scalar.GetByteSize(), error))
            return false;
    }

    return true;
}

//------------------------------------------------------------------
/// Install the utility function into a process
///
/// @param[in] diagnostic_manager
///     A diagnostic manager to report errors and warnings to.
///
/// @param[in] exe_ctx
///     The execution context to install the utility function to.
///
/// @return
///     True on success (no errors); false otherwise.
//------------------------------------------------------------------
bool ClangUtilityFunction::Install(DiagnosticManager &diagnostic_manager,
                                   ExecutionContext &exe_ctx) {
  if (m_jit_start_addr != LLDB_INVALID_ADDRESS) {
    diagnostic_manager.PutCString(eDiagnosticSeverityWarning,
                                  "already installed");
    return false;
  }

  ////////////////////////////////////
  // Set up the target and compiler
  //

  Target *target = exe_ctx.GetTargetPtr();

  if (!target) {
    diagnostic_manager.PutCString(eDiagnosticSeverityError, "invalid target");
    return false;
  }

  Process *process = exe_ctx.GetProcessPtr();

  if (!process) {
    diagnostic_manager.PutCString(eDiagnosticSeverityError, "invalid process");
    return false;
  }

  //////////////////////////
  // Parse the expression
  //

  bool keep_result_in_memory = false;

  ResetDeclMap(exe_ctx, keep_result_in_memory);

  if (!DeclMap()->WillParse(exe_ctx, NULL)) {
    diagnostic_manager.PutCString(
        eDiagnosticSeverityError,
        "current process state is unsuitable for expression parsing");
    return false;
  }

  const bool generate_debug_info = true;
  ClangExpressionParser parser(exe_ctx.GetBestExecutionContextScope(), *this,
                               generate_debug_info);

  unsigned num_errors = parser.Parse(diagnostic_manager);

  if (num_errors) {
    ResetDeclMap();

    return false;
  }

  //////////////////////////////////
  // JIT the output of the parser
  //

  bool can_interpret = false; // should stay that way

  Error jit_error = parser.PrepareForExecution(
      m_jit_start_addr, m_jit_end_addr, m_execution_unit_sp, exe_ctx,
      can_interpret, eExecutionPolicyAlways);

  if (m_jit_start_addr != LLDB_INVALID_ADDRESS) {
    m_jit_process_wp = process->shared_from_this();
    if (parser.GetGenerateDebugInfo())
      m_execution_unit_sp->CreateJITModule(FunctionName());
  }

#if 0
	// jingham: look here
    StreamFile logfile ("/tmp/exprs.txt", "a");
    logfile.Printf ("0x%16.16" PRIx64 ": func = %s, source =\n%s\n",
                    m_jit_start_addr, 
                    m_function_name.c_str(), 
                    m_function_text.c_str());
#endif

  DeclMap()->DidParse();

  ResetDeclMap();

  if (jit_error.Success()) {
    return true;
  } else {
    const char *error_cstr = jit_error.AsCString();
    if (error_cstr && error_cstr[0]) {
      diagnostic_manager.Printf(eDiagnosticSeverityError, "%s", error_cstr);
//.........这里部分代码省略.........

unsigned
ClangExpressionParser::Parse(DiagnosticManager &diagnostic_manager)
{
    ClangDiagnosticManagerAdapter *adapter =
        static_cast<ClangDiagnosticManagerAdapter *>(m_compiler->getDiagnostics().getClient());
    clang::TextDiagnosticBuffer *diag_buf = adapter->GetPassthrough();
    diag_buf->FlushDiagnostics(m_compiler->getDiagnostics());

    adapter->ResetManager(&diagnostic_manager);

    const char *expr_text = m_expr.Text();

    clang::SourceManager &source_mgr = m_compiler->getSourceManager();
    bool created_main_file = false;
    if (m_compiler->getCodeGenOpts().getDebugInfo() == codegenoptions::FullDebugInfo)
    {
        int temp_fd = -1;
        llvm::SmallString<PATH_MAX> result_path;
        FileSpec tmpdir_file_spec;
        if (HostInfo::GetLLDBPath(lldb::ePathTypeLLDBTempSystemDir, tmpdir_file_spec))
        {
            tmpdir_file_spec.AppendPathComponent("lldb-%%%%%%.expr");
            std::string temp_source_path = tmpdir_file_spec.GetPath();
            llvm::sys::fs::createUniqueFile(temp_source_path, temp_fd, result_path);
        }
        else
        {
            llvm::sys::fs::createTemporaryFile("lldb", "expr", temp_fd, result_path);
        }

        if (temp_fd != -1)
        {
            lldb_private::File file(temp_fd, true);
            const size_t expr_text_len = strlen(expr_text);
            size_t bytes_written = expr_text_len;
            if (file.Write(expr_text, bytes_written).Success())
            {
                if (bytes_written == expr_text_len)
                {
                    file.Close();
                    source_mgr.setMainFileID(source_mgr.createFileID(m_file_manager->getFile(result_path),
                                                                     SourceLocation(), SrcMgr::C_User));
                    created_main_file = true;
                }
            }
        }
    }

    if (!created_main_file)
    {
        std::unique_ptr<MemoryBuffer> memory_buffer = MemoryBuffer::getMemBufferCopy(expr_text, __FUNCTION__);
        source_mgr.setMainFileID(source_mgr.createFileID(std::move(memory_buffer)));
    }

    diag_buf->BeginSourceFile(m_compiler->getLangOpts(), &m_compiler->getPreprocessor());

    ClangExpressionHelper *type_system_helper = dyn_cast<ClangExpressionHelper>(m_expr.GetTypeSystemHelper());

    ASTConsumer *ast_transformer = type_system_helper->ASTTransformer(m_code_generator.get());

    if (ClangExpressionDeclMap *decl_map = type_system_helper->DeclMap())
        decl_map->InstallCodeGenerator(m_code_generator.get());

    if (ast_transformer)
    {
        ast_transformer->Initialize(m_compiler->getASTContext());
        ParseAST(m_compiler->getPreprocessor(), ast_transformer, m_compiler->getASTContext());
    }
    else
    {
        m_code_generator->Initialize(m_compiler->getASTContext());
        ParseAST(m_compiler->getPreprocessor(), m_code_generator.get(), m_compiler->getASTContext());
    }

    diag_buf->EndSourceFile();

    unsigned num_errors = diag_buf->getNumErrors();

    if (m_pp_callbacks && m_pp_callbacks->hasErrors())
    {
        num_errors++;
        diagnostic_manager.PutCString(eDiagnosticSeverityError, "while importing modules:");
        diagnostic_manager.AppendMessageToDiagnostic(m_pp_callbacks->getErrorString().c_str());
    }

    if (!num_errors)
    {
        if (type_system_helper->DeclMap() && !type_system_helper->DeclMap()->ResolveUnknownTypes())
        {
            diagnostic_manager.Printf(eDiagnosticSeverityError, "Couldn't infer the type of a variable");
            num_errors++;
        }
    }

    if (!num_errors)
    {
        type_system_helper->CommitPersistentDecls();
    }

    adapter->ResetManager();
//.........这里部分代码省略.........

bool BreakpointLocation::ConditionSaysStop(ExecutionContext &exe_ctx,
                                           Status &error) {
  Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS);

  std::lock_guard<std::mutex> guard(m_condition_mutex);

  size_t condition_hash;
  const char *condition_text = GetConditionText(&condition_hash);

  if (!condition_text) {
    m_user_expression_sp.reset();
    return false;
  }

  error.Clear();

  DiagnosticManager diagnostics;

  if (condition_hash != m_condition_hash || !m_user_expression_sp ||
      !m_user_expression_sp->MatchesContext(exe_ctx)) {
    LanguageType language = eLanguageTypeUnknown;
    // See if we can figure out the language from the frame, otherwise use the
    // default language:
    CompileUnit *comp_unit = m_address.CalculateSymbolContextCompileUnit();
    if (comp_unit)
      language = comp_unit->GetLanguage();

    m_user_expression_sp.reset(GetTarget().GetUserExpressionForLanguage(
        condition_text, llvm::StringRef(), language, Expression::eResultTypeAny,
        EvaluateExpressionOptions(), nullptr, error));
    if (error.Fail()) {
      if (log)
        log->Printf("Error getting condition expression: %s.",
                    error.AsCString());
      m_user_expression_sp.reset();
      return true;
    }

    if (!m_user_expression_sp->Parse(diagnostics, exe_ctx,
                                     eExecutionPolicyOnlyWhenNeeded, true,
                                     false)) {
      error.SetErrorStringWithFormat(
          "Couldn't parse conditional expression:\n%s",
          diagnostics.GetString().c_str());
      m_user_expression_sp.reset();
      return true;
    }

    m_condition_hash = condition_hash;
  }

  // We need to make sure the user sees any parse errors in their condition, so
  // we'll hook the constructor errors up to the debugger's Async I/O.

  ValueObjectSP result_value_sp;

  EvaluateExpressionOptions options;
  options.SetUnwindOnError(true);
  options.SetIgnoreBreakpoints(true);
  options.SetTryAllThreads(true);
  options.SetResultIsInternal(
      true); // Don't generate a user variable for condition expressions.

  Status expr_error;

  diagnostics.Clear();

  ExpressionVariableSP result_variable_sp;

  ExpressionResults result_code = m_user_expression_sp->Execute(
      diagnostics, exe_ctx, options, m_user_expression_sp, result_variable_sp);

  bool ret;

  if (result_code == eExpressionCompleted) {
    if (!result_variable_sp) {
      error.SetErrorString("Expression did not return a result");
      return false;
    }

    result_value_sp = result_variable_sp->GetValueObject();

    if (result_value_sp) {
      ret = result_value_sp->IsLogicalTrue(error);
      if (log) {
        if (error.Success()) {
          log->Printf("Condition successfully evaluated, result is %s.\n",
                      ret ? "true" : "false");
        } else {
          error.SetErrorString(
              "Failed to get an integer result from the expression");
          ret = false;
        }
      }
    } else {
      ret = false;
      error.SetErrorString("Failed to get any result from the expression");
    }
  } else {
    ret = false;
//.........这里部分代码省略.........

unsigned
ClangExpressionParser::ParseInternal(DiagnosticManager &diagnostic_manager,
                                     CodeCompleteConsumer *completion_consumer,
                                     unsigned completion_line,
                                     unsigned completion_column) {
  ClangDiagnosticManagerAdapter *adapter =
      static_cast<ClangDiagnosticManagerAdapter *>(
          m_compiler->getDiagnostics().getClient());
  clang::TextDiagnosticBuffer *diag_buf = adapter->GetPassthrough();
  diag_buf->FlushDiagnostics(m_compiler->getDiagnostics());

  adapter->ResetManager(&diagnostic_manager);

  const char *expr_text = m_expr.Text();

  clang::SourceManager &source_mgr = m_compiler->getSourceManager();
  bool created_main_file = false;

  // Clang wants to do completion on a real file known by Clang's file manager,
  // so we have to create one to make this work.
  // TODO: We probably could also simulate to Clang's file manager that there
  // is a real file that contains our code.
  bool should_create_file = completion_consumer != nullptr;

  // We also want a real file on disk if we generate full debug info.
  should_create_file |= m_compiler->getCodeGenOpts().getDebugInfo() ==
                        codegenoptions::FullDebugInfo;

  if (should_create_file) {
    int temp_fd = -1;
    llvm::SmallString<128> result_path;
    if (FileSpec tmpdir_file_spec = HostInfo::GetProcessTempDir()) {
      tmpdir_file_spec.AppendPathComponent("lldb-%%%%%%.expr");
      std::string temp_source_path = tmpdir_file_spec.GetPath();
      llvm::sys::fs::createUniqueFile(temp_source_path, temp_fd, result_path);
    } else {
      llvm::sys::fs::createTemporaryFile("lldb", "expr", temp_fd, result_path);
    }

    if (temp_fd != -1) {
      lldb_private::File file(temp_fd, true);
      const size_t expr_text_len = strlen(expr_text);
      size_t bytes_written = expr_text_len;
      if (file.Write(expr_text, bytes_written).Success()) {
        if (bytes_written == expr_text_len) {
          file.Close();
          source_mgr.setMainFileID(
              source_mgr.createFileID(m_file_manager->getFile(result_path),
                                      SourceLocation(), SrcMgr::C_User));
          created_main_file = true;
        }
      }
    }
  }

  if (!created_main_file) {
    std::unique_ptr<MemoryBuffer> memory_buffer =
        MemoryBuffer::getMemBufferCopy(expr_text, __FUNCTION__);
    source_mgr.setMainFileID(source_mgr.createFileID(std::move(memory_buffer)));
  }

  diag_buf->BeginSourceFile(m_compiler->getLangOpts(),
                            &m_compiler->getPreprocessor());

  ClangExpressionHelper *type_system_helper =
      dyn_cast<ClangExpressionHelper>(m_expr.GetTypeSystemHelper());

  ASTConsumer *ast_transformer =
      type_system_helper->ASTTransformer(m_code_generator.get());

  if (ClangExpressionDeclMap *decl_map = type_system_helper->DeclMap())
    decl_map->InstallCodeGenerator(m_code_generator.get());

  // If we want to parse for code completion, we need to attach our code
  // completion consumer to the Sema and specify a completion position.
  // While parsing the Sema will call this consumer with the provided
  // completion suggestions.
  if (completion_consumer) {
    auto main_file = source_mgr.getFileEntryForID(source_mgr.getMainFileID());
    auto &PP = m_compiler->getPreprocessor();
    // Lines and columns start at 1 in Clang, but code completion positions are
    // indexed from 0, so we need to add 1 to the line and column here.
    ++completion_line;
    ++completion_column;
    PP.SetCodeCompletionPoint(main_file, completion_line, completion_column);
  }

  if (ast_transformer) {
    ast_transformer->Initialize(m_compiler->getASTContext());
    ParseAST(m_compiler->getPreprocessor(), ast_transformer,
             m_compiler->getASTContext(), false, TU_Complete,
             completion_consumer);
  } else {
    m_code_generator->Initialize(m_compiler->getASTContext());
    ParseAST(m_compiler->getPreprocessor(), m_code_generator.get(),
             m_compiler->getASTContext(), false, TU_Complete,
             completion_consumer);
  }

  diag_buf->EndSourceFile();
//.........这里部分代码省略.........

bool ClangUserExpression::AddArguments(ExecutionContext &exe_ctx,
                                       std::vector<lldb::addr_t> &args,
                                       lldb::addr_t struct_address,
                                       DiagnosticManager &diagnostic_manager) {
  lldb::addr_t object_ptr = LLDB_INVALID_ADDRESS;
  lldb::addr_t cmd_ptr = LLDB_INVALID_ADDRESS;

  if (m_needs_object_ptr) {
    lldb::StackFrameSP frame_sp = exe_ctx.GetFrameSP();
    if (!frame_sp)
      return true;

    ConstString object_name;

    if (m_in_cplusplus_method) {
      object_name.SetCString("this");
    } else if (m_in_objectivec_method) {
      object_name.SetCString("self");
    } else {
      diagnostic_manager.PutString(
          eDiagnosticSeverityError,
          "need object pointer but don't know the language");
      return false;
    }

    Status object_ptr_error;

    object_ptr = GetObjectPointer(frame_sp, object_name, object_ptr_error);

    if (!object_ptr_error.Success()) {
      exe_ctx.GetTargetRef().GetDebugger().GetAsyncOutputStream()->Printf(
          "warning: `%s' is not accessible (substituting 0)\n",
          object_name.AsCString());
      object_ptr = 0;
    }

    if (m_in_objectivec_method) {
      ConstString cmd_name("_cmd");

      cmd_ptr = GetObjectPointer(frame_sp, cmd_name, object_ptr_error);

      if (!object_ptr_error.Success()) {
        diagnostic_manager.Printf(
            eDiagnosticSeverityWarning,
            "couldn't get cmd pointer (substituting NULL): %s",
            object_ptr_error.AsCString());
        cmd_ptr = 0;
      }
    }

    args.push_back(object_ptr);

    if (m_in_objectivec_method)
      args.push_back(cmd_ptr);

    args.push_back(struct_address);
  } else {
    args.push_back(struct_address);
  }
  return true;
}

bool ClangUserExpression::Parse(DiagnosticManager &diagnostic_manager,
                                ExecutionContext &exe_ctx,
                                lldb_private::ExecutionPolicy execution_policy,
                                bool keep_result_in_memory,
                                bool generate_debug_info) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));

  if (!PrepareForParsing(diagnostic_manager, exe_ctx))
    return false;

  if (log)
    log->Printf("Parsing the following code:\n%s", m_transformed_text.c_str());

  ////////////////////////////////////
  // Set up the target and compiler
  //

  Target *target = exe_ctx.GetTargetPtr();

  if (!target) {
    diagnostic_manager.PutString(eDiagnosticSeverityError, "invalid target");
    return false;
  }

  //////////////////////////
  // Parse the expression
  //

  m_materializer_ap.reset(new Materializer());

  ResetDeclMap(exe_ctx, m_result_delegate, keep_result_in_memory);

  OnExit on_exit([this]() { ResetDeclMap(); });

  if (!DeclMap()->WillParse(exe_ctx, m_materializer_ap.get())) {
    diagnostic_manager.PutString(
        eDiagnosticSeverityError,
        "current process state is unsuitable for expression parsing");
    return false;
  }

  if (m_options.GetExecutionPolicy() == eExecutionPolicyTopLevel) {
    DeclMap()->SetLookupsEnabled(true);
  }

  Process *process = exe_ctx.GetProcessPtr();
  ExecutionContextScope *exe_scope = process;

  if (!exe_scope)
    exe_scope = exe_ctx.GetTargetPtr();

  // We use a shared pointer here so we can use the original parser - if it
  // succeeds or the rewrite parser we might make if it fails.  But the
  // parser_sp will never be empty.

  ClangExpressionParser parser(exe_scope, *this, generate_debug_info);

  unsigned num_errors = parser.Parse(diagnostic_manager);

  // Check here for FixItHints.  If there are any try to apply the fixits and
  // set the fixed text in m_fixed_text before returning an error.
  if (num_errors) {
    if (diagnostic_manager.HasFixIts()) {
      if (parser.RewriteExpression(diagnostic_manager)) {
        size_t fixed_start;
        size_t fixed_end;
        const std::string &fixed_expression =
            diagnostic_manager.GetFixedExpression();
        if (ExpressionSourceCode::GetOriginalBodyBounds(
                fixed_expression, m_expr_lang, fixed_start, fixed_end))
          m_fixed_text =
              fixed_expression.substr(fixed_start, fixed_end - fixed_start);
      }
    }
    return false;
  }

  //////////////////////////////////////////////////////////////////////////////////////////
  // Prepare the output of the parser for execution, evaluating it statically
  // if possible
  //

  {
    Status jit_error = parser.PrepareForExecution(
        m_jit_start_addr, m_jit_end_addr, m_execution_unit_sp, exe_ctx,
        m_can_interpret, execution_policy);

    if (!jit_error.Success()) {
      const char *error_cstr = jit_error.AsCString();
      if (error_cstr && error_cstr[0])
        diagnostic_manager.PutString(eDiagnosticSeverityError, error_cstr);
      else
        diagnostic_manager.PutString(eDiagnosticSeverityError,
                                     "expression can't be interpreted or run");
      return false;
    }
  }

  if (exe_ctx.GetProcessPtr() && execution_policy == eExecutionPolicyTopLevel) {
    Status static_init_error =
//.........这里部分代码省略.........