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I am playing with IE's JavaScript Chakra engine.

I have downloaded example code from MSDN and I am trying to figure out how to get the function source when I have just function IDand script ID.

I start profiling my js script and from profiler (IActiveScriptProfilerCallback2) output I can see what functions are compiled, called...

For example callback for FunctionCompiled looks like this. I get function id and script id, even function name, but I can't figure out how to find function source code.

HRESULT Profiler::FunctionCompiled(PROFILER_TOKEN functionId, PROFILER_TOKEN scriptId, const wchar_t *pwszFunctionName, const wchar_t *pwszFunctionNameHint, IUnknown *pIDebugDocumentContext)
{
    fwprintf(stdout, L"Profiler::FunctionCompiled: 0x%lx, 0x%lx, %s, %s\n", scriptId, functionId, pwszFunctionName, pwszFunctionNameHint);
    return S_OK;
}
Uwe Keim
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Caldur
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    Do you have a non null pIDebugDocumentContext? – Simon Mourier Jun 26 '14 at 11:59
  • sometimes yes, sometimes no. But it seems that it is NULL only during initialization, so maybe I could use it. I am trying it now, but still must check EnumCodeContexts method better. It seems that somehow I might be able to find function source there. Any help is appreciated :) – Caldur Jun 26 '14 at 13:19

1 Answers1

2

I think I solved it.. Here is my ugly ScriptCompiled function.

HRESULT Profiler::ScriptCompiled(PROFILER_TOKEN scriptId, PROFILER_SCRIPT_TYPE type, IUnknown *pIDebugDocumentContext)
{
    fwprintf(stdout, L"Profiler::ScriptCompiled: 0x%lx, %u\n", scriptId, type);

    if (pIDebugDocumentContext) {
        IDebugDocumentContext *debugDocumentContext = NULL;
        pIDebugDocumentContext->QueryInterface(__uuidof(IDebugDocumentContext), (void**)&debugDocumentContext);

        IDebugDocument *debugDocument = NULL;
        debugDocumentContext->GetDocument(&debugDocument);

        IDebugDocumentText *debugDocumentText = NULL;
        debugDocument->QueryInterface(__uuidof(IDebugDocumentText), (void**)&debugDocumentText);

        ULONG lines, chars;
        debugDocumentText->GetSize(&lines, &chars);

        printf("Lines: %d Chars: %d\n", lines, chars);

        chars++;
        WCHAR *text = (WCHAR*)malloc(sizeof(WCHAR) * chars);
        ULONG charsRetrieved = 0;
        debugDocumentText->GetText(0, text, NULL, &charsRetrieved, chars);
        text[charsRetrieved] = L'\0';

        wprintf(L"%s\n", text);
    }

    return S_OK;
}
Caldur
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