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-rw-r--r--Lib/test/test_capi.py4
-rw-r--r--Modules/_tracemalloc.c6
2 files changed, 10 insertions, 0 deletions
diff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
index ae9e08a09b..947da8c562 100644
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -534,6 +534,8 @@ 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)
@@ -548,6 +550,8 @@ 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)
diff --git a/Modules/_tracemalloc.c b/Modules/_tracemalloc.c
index 4f3bb5463f..a61bdb62fb 100644
--- a/Modules/_tracemalloc.c
+++ b/Modules/_tracemalloc.c
@@ -1492,6 +1492,12 @@ _PyMem_DumpTraceback(int fd, const void *ptr)
traceback_t *traceback;
int i;
+ if (!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;