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On ResourceWarning, log traceback where the object was allocated

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Issue #26567:

* Add a new function PyErr_ResourceWarning() function to pass the destroyed
  object
* Add a source attribute to warnings.WarningMessage
* Add warnings._showwarnmsg() which uses tracemalloc to get the traceback where
  source object was allocated.
This commit is contained in:
Victor Stinner 2016-03-19 01:03:51 +01:00
parent 1231a4615f
commit 914cde89d4
11 changed files with 175 additions and 40 deletions
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3
Modules/_io/fileio.c
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@ -92,8 +92,7 @@ fileio_dealloc_warn(fileio *self, PyObject *source)
if (self->fd >= 0 && self->closefd) {
PyObject *exc, *val, *tb;
PyErr_Fetch(&exc, &val, &tb);
if (PyErr_WarnFormat(PyExc_ResourceWarning, 1,
"unclosed file %R", source)) {
if (PyErr_ResourceWarning(source, 1, "unclosed file %R", source)) {
/* Spurious errors can appear at shutdown */
if (PyErr_ExceptionMatches(PyExc_Warning))
PyErr_WriteUnraisable((PyObject *) self);