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Handle tcache init failures gracefully

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tsd_tcache_data_init() returns true on failure but its callers ignore
this return value, leaving the per-thread tcache in an uninitialized
state after a failure.

This change disables the tcache on an initialization failure and logs
an error message.  If opt_abort is true, it will also abort.

New unit tests have been added to test tcache initialization failures.
This commit is contained in:
Carl Shapiro 2026-03-02 17:15:35 -08:00
parent 672bb57ed8
commit 1652fec1b4
4 changed files with 162 additions and 21 deletions
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5
include/jemalloc/internal/tcache_externs.h
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@ -64,7 +64,7 @@ bool tcache_bin_ncached_max_read(
void tcache_arena_reassociate(
tsdn_t *tsdn, tcache_slow_t *tcache_slow, tcache_t *tcache, arena_t *arena);
tcache_t *tcache_create_explicit(tsd_t *tsd);
void thread_tcache_max_set(tsd_t *tsd, size_t tcache_max);
bool thread_tcache_max_set(tsd_t *tsd, size_t tcache_max);
void tcache_cleanup(tsd_t *tsd);
void tcache_stats_merge(tsdn_t *tsdn, tcache_t *tcache, arena_t *arena);
bool tcaches_create(tsd_t *tsd, base_t *base, unsigned *r_ind);
@ -80,6 +80,9 @@ void tcache_flush(tsd_t *tsd);
bool tsd_tcache_enabled_data_init(tsd_t *tsd);
void tcache_enabled_set(tsd_t *tsd, bool enabled);
extern void *(*JET_MUTABLE tcache_stack_alloc)(tsdn_t *tsdn, size_t size,
size_t alignment);
void tcache_assert_initialized(tcache_t *tcache);
extern te_base_cb_t tcache_gc_te_handler;