Embedding V8: How to make Chrome Dev Tools show the JavaScript source

[DaManuell]

SO question: https://stackoverflow.com/questions/55629539/how-to-make-chrome-dev-tools-show-the-javascript-source

[DaManuell]

I used CDT on CDT to record the WebSocket Traffic between Chrome and my embedding app.

Sent by Chrome to my app:

{"id":1,"method":"Profiler.enable"}

{"id":2,"method":"Runtime.enable"}

{"id":3,"method":"Debugger.enable"}

{"id":4,"method":"Debugger.setPauseOnExceptions","params":{"state":"none"}}

{"id":5,"method":"Debugger.setAsyncCallStackDepth","params":{"maxDepth":32}}

{"id":6,"method":"Debugger.setBlackboxPatterns","params":{"patterns":[]}}

{"id":7,"method":"Runtime.runIfWaitingForDebugger"}

Sent by my app to chrome:

{"id":1,"result":{}}

{"method":"Runtime.executionContextCreated","params":{"context":{"id":1,"origin":"","name":"MyApp"}}}

{"id":2,"result":{}}

{"method":"Debugger.scriptParsed","params":{"scriptId":"4","url":"func_add.js","startLine":0,"startColumn":0,"endLine":2,"endColumn":2,"executionContextId":1,"hash":"1445a7804cf3405670df7a539876752304d4fa3a","isLiveEdit":false,"sourceMapURL":"","hasSourceURL":false,"isModule":false,"length":37}}

{"id":3,"result":{"debuggerId":"(1FEE5CC1932E43F4AC090457F0333F66)"}}

{"id":4,"result":{}}

{"id":5,"result":{}}

{"id":6,"result":{}}

{"id":7,"result":{}}

Chrome does not send the "Debugger.getScriptSource" request...

Le jeudi 11 avril 2019 16:29:13 UTC+2, DaManuell a écrit :

SO question: https://stackoverflow.com/questions/55629539/how-to-make-chrome-dev-tools-show-the-javascript-source

[Alexey Shcherbyna]

Hi, my suggestions are:

1) to double check if the path to your sources is correct and accessible

2) put script source as parameter when you compile script in v8

#if defined(DEBUG)
    auto src = File::ReadText(filename);
    auto originName = "file://" + filename;
    v8::ScriptOrigin origin(ArgConverter::ConvertToV8String(isolate, originName));
    script = v8::Script::Compile(getContext(), sourcePersistent.Get(isolate), &origin);

#else
    script = v8::Script::Compile(getContext(), sourcePersistent.Get(isolate));
#endif // DEBUG

пт, 12 апр. 2019 г. в 11:17, DaManuell <manuel....@gmail.com>:

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[DaManuell]

Thank you. Your suggestion made me review my code.

The version I used when playing with the v8::ScriptOrigin using "file://" url was missing the infamous third slash before D:...

Now, my file is visible in CDT, and I can put a breakpoint (which makes my embedding process crashes immediately for some threading issues, but that was "expected", in a way...)

But why is CDT asking me for the Script source via:

{"id":8,"method":"Debugger.getScriptSource","params":{"scriptId":"4"}} ?

Does that means that I just have to provide a well formed url when compiling and that CDT will ask me for the source anyway?

If so, what kind of "ScriptOrigin" value should I give to "Compile" when the script is a scriptlet not backed up by a file?