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bpo-29564:_PyMem_DumpTraceback() suggests enabling tracemalloc (GH-10510) 

If tracemalloc is not tracing Python memory allocations,
_PyMem_DumpTraceback() now suggests to enable tracemalloc
to get the traceback where the memory block has been allocated.
This commit is contained in:
Victor Stinner 2018-11-13 15:14:58 +01:00 committed by GitHub
parent 474eedfb3d
commit f966e5397e
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2 changed files with 10 additions and 0 deletions
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4
Lib/test/test_capi.py
View File

@ -486,6 +486,8 @@ class PyMemDebugTests(unittest.TestCase):
r" The block was made by call #[0-9]+ to debug malloc/realloc.\n"
r" Data at p: cb cb cb .*\n"
r"\n"
r"Enable tracemalloc to get the memory block allocation traceback\n"
r"\n"
r"Fatal Python error: bad trailing pad byte")
regex = regex.format(ptr=self.PTR_REGEX)
regex = re.compile(regex, flags=re.DOTALL)
@ -500,6 +502,8 @@ class PyMemDebugTests(unittest.TestCase):
r" The block was made by call #[0-9]+ to debug malloc/realloc.\n"
r" Data at p: cb cb cb .*\n"
r"\n"
r"Enable tracemalloc to get the memory block allocation traceback\n"
r"\n"
r"Fatal Python error: bad ID: Allocated using API 'm', verified using API 'r'\n")
regex = regex.format(ptr=self.PTR_REGEX)
self.assertRegex(out, regex)

6
Modules/_tracemalloc.c
View File

@ -1471,6 +1471,12 @@ _PyMem_DumpTraceback(int fd, const void *ptr)
traceback_t *traceback;
int i;
if (!_Py_tracemalloc_config.tracing) {
PUTS(fd, "Enable tracemalloc to get the memory block "
"allocation traceback\n\n");
return;
}
traceback = tracemalloc_get_traceback(DEFAULT_DOMAIN, (uintptr_t)ptr);
if (traceback == NULL)
return;