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Derive arena constants from MALLOCX_ARENA_BITS

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Replaces the hardcoded values for `MALLCTL_ARENAS_ALL` and
`MALLCTL_ARENAS_DESTROYED` with expressions derived from
`MALLOCX_ARENA_BITS`.

This prevents a potential crash (e.g., in stats printing) that would
occur if `MALLOCX_ARENA_BITS` were changed while these macro values
remained hardcoded.

Signed-off-by: Xin Yang <yangxin.dev@bytedance.com>
This commit is contained in:
Xin Yang 2025-05-23 16:00:55 +08:00
parent 5e460bfea2
commit 366bfc781b
1 changed files with 2 additions and 2 deletions
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4
include/jemalloc/jemalloc_macros.h.in
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@ -44,12 +44,12 @@
* mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".purge", NULL, NULL, NULL,
* 0);
*/
#define MALLCTL_ARENAS_ALL 4096
#define MALLCTL_ARENAS_ALL (1U << MALLOCX_ARENA_BITS)
/*
* Use as arena index in "stats.arenas.<i>.*" mallctl interfaces to select
* destroyed arenas.
*/
#define MALLCTL_ARENAS_DESTROYED 4097
#define MALLCTL_ARENAS_DESTROYED ((1U << MALLOCX_ARENA_BITS) + 1)
#if defined(__cplusplus) && defined(JEMALLOC_USE_CXX_THROW)
# define JEMALLOC_CXX_THROW noexcept (true)