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authorMaurice Kalinowski <maurice.kalinowski@nokia.com>2009-10-13 13:43:56 (GMT)
committerJason McDonald <jason.mcdonald@nokia.com>2009-10-13 14:30:22 (GMT)
commit15d44ea32164a1205bef7938da331457054f8df4 (patch)
treef06bc4bf1baa71324d36d6efa15993de8e7f8c6a /src/3rdparty/webkit/JavaScriptCore/API/JSProfilerPrivate.cpp
parent1fb2cc6241d715a641dd6bee48eb9bcafaf558b1 (diff)
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crash fix on WinCE without gesture support
dd9d8693 added some checks causing SetGestureConfig to not be initialized to 0. Thus it gets derefenced and causes crashes on all WinCE applications. Reviewed-by: denis Reviewed-by: ninerider (cherry picked from commit fa4d78a580fb4deb0c2c5de253b3b18a4ad18ab3)
Diffstat (limited to 'src/3rdparty/webkit/JavaScriptCore/API/JSProfilerPrivate.cpp')
0 files changed, 0 insertions, 0 deletions
generated by cgit v0.12 at 2025-06-08 23:34:42 (GMT)
165 166 167 168 

#define _PY_INTERPRETER

#include "Python.h"
#include "frameobject.h"
#include "pycore_code.h"          // stats
#include "pycore_frame.h"
#include "pycore_object.h"        // _PyObject_GC_UNTRACK()
#include "opcode.h"

int
_PyFrame_Traverse(_PyInterpreterFrame *frame, visitproc visit, void *arg)
{
    Py_VISIT(frame->frame_obj);
    Py_VISIT(frame->f_locals);
    Py_VISIT(frame->f_funcobj);
    Py_VISIT(frame->f_code);
   /* locals */
    PyObject **locals = _PyFrame_GetLocalsArray(frame);
    int i = 0;
    /* locals and stack */
    for (; i <frame->stacktop; i++) {
        Py_VISIT(locals[i]);
    }
    return 0;
}

PyFrameObject *
_PyFrame_MakeAndSetFrameObject(_PyInterpreterFrame *frame)
{
    assert(frame->frame_obj == NULL);
    PyObject *exc = PyErr_GetRaisedException();

    PyFrameObject *f = _PyFrame_New_NoTrack(frame->f_code);
    if (f == NULL) {
        Py_XDECREF(exc);
        return NULL;
    }
    PyErr_SetRaisedException(exc);
    if (frame->frame_obj) {
        // GH-97002: How did we get into this horrible situation? Most likely,
        // allocating f triggered a GC collection, which ran some code that
        // *also* created the same frame... while we were in the middle of
        // creating it! See test_sneaky_frame_object in test_frame.py for a
        // concrete example.
        //
        // Regardless, just throw f away and use that frame instead, since it's
        // already been exposed to user code. It's actually a bit tricky to do
        // this, since we aren't backed by a real _PyInterpreterFrame anymore.
        // Just pretend that we have an owned, cleared frame so frame_dealloc
        // doesn't make the situation worse:
        f->f_frame = (_PyInterpreterFrame *)f->_f_frame_data;
        f->f_frame->owner = FRAME_CLEARED;
        f->f_frame->frame_obj = f;
        Py_DECREF(f);
        return frame->frame_obj;
    }
    assert(frame->owner != FRAME_OWNED_BY_FRAME_OBJECT);
    assert(frame->owner != FRAME_CLEARED);
    f->f_frame = frame;
    frame->frame_obj = f;
    return f;
}

void
_PyFrame_Copy(_PyInterpreterFrame *src, _PyInterpreterFrame *dest)
{
    assert(src->stacktop >= src->f_code->co_nlocalsplus);
    Py_ssize_t size = ((char*)&src->localsplus[src->stacktop]) - (char *)src;
    memcpy(dest, src, size);
    // Don't leave a dangling pointer to the old frame when creating generators
    // and coroutines:
    dest->previous = NULL;
}


static void
take_ownership(PyFrameObject *f, _PyInterpreterFrame *frame)
{
    assert(frame->owner != FRAME_OWNED_BY_CSTACK);
    assert(frame->owner != FRAME_OWNED_BY_FRAME_OBJECT);
    assert(frame->owner != FRAME_CLEARED);
    Py_ssize_t size = ((char*)&frame->localsplus[frame->stacktop]) - (char *)frame;
    Py_INCREF(frame->f_code);
    memcpy((_PyInterpreterFrame *)f->_f_frame_data, frame, size);
    frame = (_PyInterpreterFrame *)f->_f_frame_data;
    f->f_frame = frame;
    frame->owner = FRAME_OWNED_BY_FRAME_OBJECT;
    if (_PyFrame_IsIncomplete(frame)) {
        // This may be a newly-created generator or coroutine frame. Since it's
        // dead anyways, just pretend that the first RESUME ran:
        PyCodeObject *code = frame->f_code;
        frame->prev_instr = _PyCode_CODE(code) + code->_co_firsttraceable;
    }
    assert(!_PyFrame_IsIncomplete(frame));
    assert(f->f_back == NULL);
    _PyInterpreterFrame *prev = _PyFrame_GetFirstComplete(frame->previous);
    frame->previous = NULL;
    if (prev) {
        assert(prev->owner != FRAME_OWNED_BY_CSTACK);
        /* Link PyFrameObjects.f_back and remove link through _PyInterpreterFrame.previous */
        PyFrameObject *back = _PyFrame_GetFrameObject(prev);
        if (back == NULL) {
            /* Memory error here. */
            assert(PyErr_ExceptionMatches(PyExc_MemoryError));
            /* Nothing we can do about it */
            PyErr_Clear();
        }
        else {
            f->f_back = (PyFrameObject *)Py_NewRef(back);
        }
    }
    if (!_PyObject_GC_IS_TRACKED((PyObject *)f)) {
        _PyObject_GC_TRACK((PyObject *)f);
    }
}

void
_PyFrame_ClearExceptCode(_PyInterpreterFrame *frame)
{
    /* It is the responsibility of the owning generator/coroutine
     * to have cleared the enclosing generator, if any. */
    assert(frame->owner != FRAME_OWNED_BY_GENERATOR ||
        _PyFrame_GetGenerator(frame)->gi_frame_state == FRAME_CLEARED);
    // GH-99729: Clearing this frame can expose the stack (via finalizers). It's
    // crucial that this frame has been unlinked, and is no longer visible:
    assert(_PyThreadState_GET()->cframe->current_frame != frame);
    if (frame->frame_obj) {
        PyFrameObject *f = frame->frame_obj;
        frame->frame_obj = NULL;
        if (Py_REFCNT(f) > 1) {
            take_ownership(f, frame);
            Py_DECREF(f);
            return;
        }
        Py_DECREF(f);
    }
    assert(frame->stacktop >= 0);
    for (int i = 0; i < frame->stacktop; i++) {
        Py_XDECREF(frame->localsplus[i]);
    }
    Py_XDECREF(frame->frame_obj);
    Py_XDECREF(frame->f_locals);
    Py_DECREF(frame->f_funcobj);
}

/* Unstable API functions */

PyObject *
PyUnstable_InterpreterFrame_GetCode(struct _PyInterpreterFrame *frame)
{
    PyObject *code = (PyObject *)frame->f_code;
    Py_INCREF(code);
    return code;
}

int
PyUnstable_InterpreterFrame_GetLasti(struct _PyInterpreterFrame *frame)
{
    return _PyInterpreterFrame_LASTI(frame) * sizeof(_Py_CODEUNIT);
}

int
PyUnstable_InterpreterFrame_GetLine(_PyInterpreterFrame *frame)
{
    int addr = _PyInterpreterFrame_LASTI(frame) * sizeof(_Py_CODEUNIT);
    return PyCode_Addr2Line(frame->f_code, addr);
}
generated by cgit v0.12 at 2025-06-08 23:34:42 (GMT)