mirror of https://github.com/python/cpython
GH-104584: Don't call executors from JUMP_BACKWARD (GH-109347)
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22e65eecaa
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@ -40,7 +40,7 @@ PyAPI_FUNC(_PyOptimizerObject *) PyUnstable_GetOptimizer(void);
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PyAPI_FUNC(_PyExecutorObject *) PyUnstable_GetExecutor(PyCodeObject *code, int offset);
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struct _PyInterpreterFrame *
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int
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_PyOptimizer_BackEdge(struct _PyInterpreterFrame *frame, _Py_CODEUNIT *src, _Py_CODEUNIT *dest, PyObject **stack_pointer);
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extern _PyOptimizerObject _PyOptimizer_Default;
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@ -2242,21 +2242,17 @@ dummy_func(
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here[1].cache += (1 << OPTIMIZER_BITS_IN_COUNTER);
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if (here[1].cache > tstate->interp->optimizer_backedge_threshold &&
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// Double-check that the opcode isn't instrumented or something:
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here->op.code == JUMP_BACKWARD &&
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// _PyOptimizer_BackEdge is going to change frame->prev_instr,
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// which breaks line event calculations:
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next_instr->op.code != INSTRUMENTED_LINE
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)
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here->op.code == JUMP_BACKWARD)
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{
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OBJECT_STAT_INC(optimization_attempts);
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frame = _PyOptimizer_BackEdge(frame, here, next_instr, stack_pointer);
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if (frame == NULL) {
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frame = tstate->current_frame;
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goto resume_with_error;
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int optimized = _PyOptimizer_BackEdge(frame, here, next_instr, stack_pointer);
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ERROR_IF(optimized < 0, error);
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if (optimized) {
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// Rewind and enter the executor:
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assert(here->op.code == ENTER_EXECUTOR);
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next_instr = here;
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}
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assert(frame == tstate->current_frame);
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here[1].cache &= ((1 << OPTIMIZER_BITS_IN_COUNTER) -1);
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goto resume_frame;
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here[1].cache &= ((1 << OPTIMIZER_BITS_IN_COUNTER) - 1);
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}
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#endif /* ENABLE_SPECIALIZATION */
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}
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@ -2945,21 +2945,17 @@
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here[1].cache += (1 << OPTIMIZER_BITS_IN_COUNTER);
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if (here[1].cache > tstate->interp->optimizer_backedge_threshold &&
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// Double-check that the opcode isn't instrumented or something:
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here->op.code == JUMP_BACKWARD &&
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// _PyOptimizer_BackEdge is going to change frame->prev_instr,
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// which breaks line event calculations:
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next_instr->op.code != INSTRUMENTED_LINE
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)
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here->op.code == JUMP_BACKWARD)
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{
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OBJECT_STAT_INC(optimization_attempts);
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frame = _PyOptimizer_BackEdge(frame, here, next_instr, stack_pointer);
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if (frame == NULL) {
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frame = tstate->current_frame;
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goto resume_with_error;
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int optimized = _PyOptimizer_BackEdge(frame, here, next_instr, stack_pointer);
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if (optimized < 0) goto error;
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if (optimized) {
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// Rewind and enter the executor:
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assert(here->op.code == ENTER_EXECUTOR);
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next_instr = here;
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}
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assert(frame == tstate->current_frame);
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here[1].cache &= ((1 << OPTIMIZER_BITS_IN_COUNTER) -1);
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goto resume_frame;
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here[1].cache &= ((1 << OPTIMIZER_BITS_IN_COUNTER) - 1);
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}
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#endif /* ENABLE_SPECIALIZATION */
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DISPATCH();
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@ -154,7 +154,7 @@ PyUnstable_SetOptimizer(_PyOptimizerObject *optimizer)
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Py_DECREF(old);
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}
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_PyInterpreterFrame *
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int
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_PyOptimizer_BackEdge(_PyInterpreterFrame *frame, _Py_CODEUNIT *src, _Py_CODEUNIT *dest, PyObject **stack_pointer)
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{
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assert(src->op.code == JUMP_BACKWARD);
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@ -162,18 +162,14 @@ _PyOptimizer_BackEdge(_PyInterpreterFrame *frame, _Py_CODEUNIT *src, _Py_CODEUNI
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assert(PyCode_Check(code));
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PyInterpreterState *interp = _PyInterpreterState_GET();
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if (!has_space_for_executor(code, src)) {
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goto jump_to_destination;
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return 0;
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}
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_PyOptimizerObject *opt = interp->optimizer;
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_PyExecutorObject *executor = NULL;
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int err = opt->optimize(opt, code, dest, &executor, (int)(stack_pointer - _PyFrame_Stackbase(frame)));
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if (err <= 0) {
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assert(executor == NULL);
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if (err < 0) {
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_PyFrame_SetStackPointer(frame, stack_pointer);
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return NULL;
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}
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goto jump_to_destination;
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return err;
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}
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int index = get_index_for_executor(code, src);
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if (index < 0) {
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@ -184,16 +180,11 @@ _PyOptimizer_BackEdge(_PyInterpreterFrame *frame, _Py_CODEUNIT *src, _Py_CODEUNI
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* it might get confused by the executor disappearing,
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* but there is not much we can do about that here. */
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Py_DECREF(executor);
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goto jump_to_destination;
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return 0;
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}
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insert_executor(code, src, index, executor);
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assert(frame->prev_instr == src);
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frame->prev_instr = dest - 1;
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return executor->execute(executor, frame, stack_pointer);
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jump_to_destination:
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frame->prev_instr = dest - 1;
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_PyFrame_SetStackPointer(frame, stack_pointer);
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return frame;
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Py_DECREF(executor);
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return 1;
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}
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_PyExecutorObject *
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