C++ ExecutionContext::GetFrameSP方法代码示例

bool
ClangUserExpression::LockAndCheckContext (ExecutionContext &exe_ctx,
                                          lldb::TargetSP &target_sp,
                                          lldb::ProcessSP &process_sp,
                                          lldb::StackFrameSP &frame_sp)
{
    lldb::ProcessSP expected_process_sp = m_process_wp.lock();
    process_sp = exe_ctx.GetProcessSP();

    if (process_sp != expected_process_sp)
        return false;

    process_sp = exe_ctx.GetProcessSP();
    target_sp = exe_ctx.GetTargetSP();
    frame_sp = exe_ctx.GetFrameSP();

    if (m_address.IsValid())
    {
        if (!frame_sp)
            return false;
        else
            return (0 == Address::CompareLoadAddress(m_address, frame_sp->GetFrameCodeAddress(), target_sp.get()));
    }

    return true;
}

void UserExpression::InstallContext(ExecutionContext &exe_ctx) {
  m_jit_process_wp = exe_ctx.GetProcessSP();

  lldb::StackFrameSP frame_sp = exe_ctx.GetFrameSP();

  if (frame_sp)
    m_address = frame_sp->GetFrameCodeAddress();
}

 GoInterpreter(ExecutionContext &exe_ctx, const char *expr)
     : m_exe_ctx(exe_ctx), m_frame(exe_ctx.GetFrameSP()), m_parser(expr) {
   if (m_frame) {
     const SymbolContext &ctx =
         m_frame->GetSymbolContext(eSymbolContextFunction);
     ConstString fname = ctx.GetFunctionName();
     if (fname.GetLength() > 0) {
       size_t dot = fname.GetStringRef().find('.');
       if (dot != llvm::StringRef::npos)
         m_package = llvm::StringRef(fname.AsCString(), dot);
     }
   }
 }

bool
ClangUserExpression::AddInitialArguments (ExecutionContext &exe_ctx,
                                          std::vector<lldb::addr_t> &args,
                                          Stream &error_stream)
{
    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
        {
            error_stream.Printf("Need object pointer but don't know the language\n");
            return false;
        }

        Error object_ptr_error;

        object_ptr = GetObjectPointer(frame_sp, object_name, object_ptr_error);

        if (!object_ptr_error.Success())
        {
            error_stream.Printf("warning: couldn't get required object pointer (substituting NULL): %s\n", object_ptr_error.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())
            {
                error_stream.Printf("warning: couldn't get cmd pointer (substituting NULL): %s\n", object_ptr_error.AsCString());
                cmd_ptr = 0;
            }
        }
        if (object_ptr)
            args.push_back(object_ptr);

        if (m_in_objectivec_method)
            args.push_back(cmd_ptr);


    }
    return true;
}

lldb_private::Error
ClangExpressionParser::PrepareForExecution (lldb::addr_t &func_addr,
                                            lldb::addr_t &func_end,
                                            lldb::IRExecutionUnitSP &execution_unit_sp,
                                            ExecutionContext &exe_ctx,
                                            bool &can_interpret,
                                            ExecutionPolicy execution_policy)
{
	func_addr = LLDB_INVALID_ADDRESS;
	func_end = LLDB_INVALID_ADDRESS;
    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));

    lldb_private::Error err;

    std::unique_ptr<llvm::Module> llvm_module_ap (m_code_generator->ReleaseModule());

    if (!llvm_module_ap.get())
    {
        err.SetErrorToGenericError();
        err.SetErrorString("IR doesn't contain a module");
        return err;
    }

    ConstString function_name;

    if (execution_policy != eExecutionPolicyTopLevel)
    {
        // Find the actual name of the function (it's often mangled somehow)

        if (!FindFunctionInModule(function_name, llvm_module_ap.get(), m_expr.FunctionName()))
        {
            err.SetErrorToGenericError();
            err.SetErrorStringWithFormat("Couldn't find %s() in the module", m_expr.FunctionName());
            return err;
        }
        else
        {
            if (log)
                log->Printf("Found function %s for %s", function_name.AsCString(), m_expr.FunctionName());
        }
    }

    SymbolContext sc;

    if (lldb::StackFrameSP frame_sp = exe_ctx.GetFrameSP())
    {
        sc = frame_sp->GetSymbolContext(lldb::eSymbolContextEverything);
    }
    else if (lldb::TargetSP target_sp = exe_ctx.GetTargetSP())
    {
        sc.target_sp = target_sp;
    }

    LLVMUserExpression::IRPasses custom_passes;
    {
        auto lang = m_expr.Language();
        if (log)
            log->Printf("%s - Currrent expression language is %s\n", __FUNCTION__,
                        Language::GetNameForLanguageType(lang));

        if (lang != lldb::eLanguageTypeUnknown)
        {
            auto runtime = exe_ctx.GetProcessSP()->GetLanguageRuntime(lang);
            if (runtime)
                runtime->GetIRPasses(custom_passes);
        }
    }

    if (custom_passes.EarlyPasses)
    {
        if (log)
            log->Printf("%s - Running Early IR Passes from LanguageRuntime on expression module '%s'", __FUNCTION__,
                        m_expr.FunctionName());

        custom_passes.EarlyPasses->run(*llvm_module_ap);
    }

    execution_unit_sp.reset(new IRExecutionUnit (m_llvm_context, // handed off here
                                                 llvm_module_ap, // handed off here
                                                 function_name,
                                                 exe_ctx.GetTargetSP(),
                                                 sc,
                                                 m_compiler->getTargetOpts().Features));

    ClangExpressionHelper *type_system_helper = dyn_cast<ClangExpressionHelper>(m_expr.GetTypeSystemHelper());
    ClangExpressionDeclMap *decl_map = type_system_helper->DeclMap(); // result can be NULL

    if (decl_map)
    {
        Stream *error_stream = NULL;
        Target *target = exe_ctx.GetTargetPtr();
        if (target)
            error_stream = target->GetDebugger().GetErrorFile().get();

        IRForTarget ir_for_target(decl_map, m_expr.NeedsVariableResolution(), *execution_unit_sp, error_stream,
                                  function_name.AsCString());

        bool ir_can_run = ir_for_target.runOnModule(*execution_unit_sp->GetModule());

        Process *process = exe_ctx.GetProcessPtr();
//.........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;
}