Message342835
I try to track down this.
sys_settrace calls PyEval_SetTrace with trace_trampoline and the function given to it. The trace_trampoline is important because it checks the result and if result is NULL (for example like f() recursion in your code) it sets c_tracefunc and c_traceobj to NULL. It is why it doesnt work.
if (result == NULL) {
PyEval_SetTrace(NULL, NULL);
Py_CLEAR(frame->f_trace);
return -1;
}
We can create a simple reset function for resetting everything and then setting c_tracefunc, c_traceobj variables back to the thread state. https://github.com/isidentical/cpython/commit/3bafbf3a89e09cc573ddbcd13f9334e164f7dd8b
But then a set of tests will fail with raw ValueError produced by tracer.
class RaisingTraceFuncTestCase(unittest.TestCase):
...
def trace(self, frame, event, arg):
"""A trace function that raises an exception in response to a
specific trace event."""
if event == self.raiseOnEvent:
raise ValueError # just something that isn't RuntimeError
else:
return self.trace
This should be catched in
def run_test_for_event(self, event):
try:
for i in range(sys.getrecursionlimit() + 1):
sys.settrace(self.trace)
try:
self.f()
except ValueError:
pass
else:
self.fail("exception not raised!")
except RuntimeError:
self.fail("recursion counter not reset")
but after resetting, it doesn't work. I'm missing something but i dont know what i'm missing. |
|
Date |
User |
Action |
Args |
2019-05-19 06:40:30 | BTaskaya | set | recipients:
+ BTaskaya, arigo, vstinner, gphemsley |
2019-05-19 06:40:30 | BTaskaya | set | messageid: <1558248030.5.0.70764619163.issue23012@roundup.psfhosted.org> |
2019-05-19 06:40:30 | BTaskaya | link | issue23012 messages |
2019-05-19 06:40:30 | BTaskaya | create | |
|