[3.13] gh-121390: tracemalloc: Fix tracebacks memory leak (GH-121391) (#121392)

miss-islington · jbrobst · web-flow · commit 4b76404a511c · 2024-07-21T13:12:13.000Z
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 db39bc4) Co-authored-by: Josh Brobst <jbrobst@proton.me>
diff --git a/Python/tracemalloc.c b/Python/tracemalloc.c
@@ -838,7 +838,7 @@ _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();
