https://github.com/python/cpython/commit/9e542f9a46a06247eafb5bc651fa06f3aaaad5eb
commit: 9e542f9a46a06247eafb5bc651fa06f3aaaad5eb
branch: 3.12
author: Miss Islington (bot) <[email protected]>
committer: vstinner <[email protected]>
date: 2024-07-05T06:59:06Z
summary:

[3.12] gh-121390: tracemalloc: Fix tracebacks memory leak (GH-121391) (#121393)

gh-121390: tracemalloc: Fix tracebacks memory leak (GH-121391)

The tracemalloc_tracebacks hash table has traceback keys and NULL
values, but its destructors do not reflect this -- key_destroy_func is
NULL while value_destroy_func is raw_free. Swap these to free the
traceback keys instead.
(cherry picked from commit db39bc42f90c151b298f97b780e62703adbf1221)

Co-authored-by: Josh Brobst <[email protected]>

files:
M Python/tracemalloc.c

diff --git a/Python/tracemalloc.c b/Python/tracemalloc.c
index bc765623522288..e13064bd145e8e 100644
--- a/Python/tracemalloc.c
+++ b/Python/tracemalloc.c
@@ -836,7 +836,7 @@ _PyTraceMalloc_Init(void)
 
     tracemalloc_tracebacks = hashtable_new(hashtable_hash_traceback,
                                            hashtable_compare_traceback,
-                                           NULL, raw_free);
+                                           raw_free, NULL);
 
     tracemalloc_traces = tracemalloc_create_traces_table();
     tracemalloc_domains = tracemalloc_create_domains_table();

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