如何在嵌入式V8中调试javascript？ 我试图学习如何在V8中使用调试对象来调试JavaScript C++应用程序中的JavaScript。

我调用了

v8:：Debug:：SetDebugEventListener

并设置了回调。然后我调用

v8:：Debug:：GetDebugContext

来获取调试上下文，然后运行类似于：

Debug.scripts（）

< >如果我从C++打印出该调用的结果，我得到：

 [{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}]

我实际上想做的是为脚本中给定的行号设置一个断点，但即使是最基本的事情也无法正常工作

我得到了对调试事件侦听器的回调，但是回调输入参数（非用户提供的）数据对我来说也没有任何意义

{script_: {context_: {data_: undefined, handle_: 0, type_: "context"}, handle_: 1, script_: {}, type_: "script"}, type_: 4}
{break_id: 2, selected_frame: 0}

谢谢。

（注意：这可能是正确的方法，也可能不是正确的方法，但在一些简单的情况下，它对我很有效）

然后打开结果：

if (debug_event_type == v8::DebugEvent::Break) {

下面是为一个被命中的非常小的断点传递的数据：

 /* GetEventData() when a breakpoint is hit returns:
     * {
     *      break_points_hit_: [{active_: true, actual_location: {column: 4, line: 13, script_id: 55}, condition_: null,
     *      script_break_point_: {
     *          active_: true,
     *          break_points_: [],
     *          column_: undefined,
     *          condition_: undefined,
     *          groupId_: undefined,
     *          line_: 13,
     *          number_: 1, <== breakpoint number - v8-assigned
     *          position_alignment_: 0,
     *          script_id_: 55, <== script id passed in from v8::ScriptOrigin when compiled
     *          type_: 0
 *          },
 *          source_position_: 175}], frame_: {break_id_: 8, details_: {break_id_: 8, details_: [392424216, {}, function a(){
    println("Beginning of a()");
    let some_var = 5;
    some_var += 5;
    b(some_var);
    println("End of a()");
}, {sourceColumnStart_: [undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, 4, undefined, undefined, undefined, undefined, undefined, undefined, undefined]}, 0, 1, 175, false, false, 0, "some_var", 5]}, index_: 0, type_: "frame"}}

/*GetEventData（）在命中断点时返回：
* {
*中断点命中：[{active\uu:true，实际位置：{column:4，line:13，script\u id:55}，条件为空，
*脚本\u断点\u点\u：{
*是的，
*中断点：[]，
*列：未定义，
*条件：未定义，
*groupId_u2;：未定义，
*第13行，
*数字：1，当我发布这篇文章时，我不知道的一件事是，有关v8:：脚本的一组信息存储在v8:：UnboundScript中，可以通过
v8:：Script:：GetUnboundScript（）从脚本中获取
，即使您没有先用v8:：ScriptCompiler显式地创建一个脚本。您找到答案了吗？@Qwertman我用我所学的内容给出了一个自我回答。在v8中调试javascript似乎非常困难，而且文档记录也非常糟糕（即使是在v8中）。
 /* GetEventData() when a breakpoint is hit returns:
     * {
     *      break_points_hit_: [{active_: true, actual_location: {column: 4, line: 13, script_id: 55}, condition_: null,
     *      script_break_point_: {
     *          active_: true,
     *          break_points_: [],
     *          column_: undefined,
     *          condition_: undefined,
     *          groupId_: undefined,
     *          line_: 13,
     *          number_: 1, <== breakpoint number - v8-assigned
     *          position_alignment_: 0,
     *          script_id_: 55, <== script id passed in from v8::ScriptOrigin when compiled
     *          type_: 0
 *          },
 *          source_position_: 175}], frame_: {break_id_: 8, details_: {break_id_: 8, details_: [392424216, {}, function a(){
    println("Beginning of a()");
    let some_var = 5;
    some_var += 5;
    b(some_var);
    println("End of a()");
}, {sourceColumnStart_: [undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, 4, undefined, undefined, undefined, undefined, undefined, undefined, undefined]}, 0, 1, 175, false, false, 0, "some_var", 5]}, index_: 0, type_: "frame"}}