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Fix json_stats mutexes test for configurable MALLCTL_ARENAS_ALL #9

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Merged
jimwwalker merged 1 commit into from
Jul 7, 2026
Merged

Fix json_stats mutexes test for configurable MALLCTL_ARENAS_ALL #9

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10 changes: 7 additions & 3 deletions test/unit/json_stats.c
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Original file line number Diff line number Diff line change
Expand Up @@ -329,11 +329,15 @@ TEST_BEGIN(test_json_stats_mutexes) {

for (size_t i = 0; i < num_arena_mutexes; i++) {
/*
* MALLCTL_ARENAS_ALL is 4096 representing all arenas in
* mallctl queries.
* MALLCTL_ARENAS_ALL selects the merged stats across all
* arenas. Its numeric value is not a fixed constant: with
* --with-lg-tcache-limit it is computed as 2^(24 - limit)
* (4096 by default, but e.g. 512 at limit 15), so stringify
* the macro rather than hard-coding 4096.
*/
verify_mutex_json(arena_mutexes_section,
"stats.arenas.4096.mutexes", arena_mutex_names[i]);
"stats.arenas." STRINGIFY(MALLCTL_ARENAS_ALL) ".mutexes",
arena_mutex_names[i]);
}

stats_buf_fini(&sbuf);
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