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Add the "thread.tcache.enabled" mallctl.

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This commit is contained in:
Jason Evans
2012-03-26 18:54:44 -07:00
parent fd4fcefa00
commit d4be8b7b6e
7 changed files with 271 additions and 36 deletions
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27
src/tcache.c
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@@ -5,6 +5,7 @@
/* Data. */
malloc_tsd_data(, tcache, tcache_t *, NULL)
malloc_tsd_data(, tcache_enabled, tcache_enabled_t, tcache_enabled_default)
bool opt_tcache = true;
ssize_t opt_lg_tcache_max = LG_TCACHE_MAXCLASS_DEFAULT;
@@ -328,25 +329,27 @@ tcache_thread_cleanup(void *arg)
{
tcache_t *tcache = *(tcache_t **)arg;
if (tcache == (void *)(uintptr_t)1) {
if (tcache == TCACHE_STATE_DISABLED) {
/* Do nothing. */
} else if (tcache == TCACHE_STATE_REINCARNATED) {
/*
* Another destructor called an allocator function after this
* destructor was called. Reset tcache to 1 in order to
* receive another callback.
*/
tcache = TCACHE_STATE_PURGATORY;
tcache_tsd_set(&tcache);
} else if (tcache == TCACHE_STATE_PURGATORY) {
/*
* The previous time this destructor was called, we set the key
* to 1 so that other destructors wouldn't cause re-creation of
* the tcache. This time, do nothing, so that the destructor
* will not be called again.
*/
} else if (tcache == (void *)(uintptr_t)2) {
/*
* Another destructor called an allocator function after this
* destructor was called. Reset tcache to 1 in order to
* receive another callback.
*/
tcache = (tcache_t *)(uintptr_t)1;
tcache_tsd_set(&tcache);
} else if (tcache != NULL) {
assert(tcache != (void *)(uintptr_t)1);
assert(tcache != TCACHE_STATE_PURGATORY);
tcache_destroy(tcache);
tcache = (tcache_t *)(uintptr_t)1;
tcache = TCACHE_STATE_PURGATORY;
tcache_tsd_set(&tcache);
}
}
@@ -428,7 +431,7 @@ tcache_boot1(void)
{
if (opt_tcache) {
if (tcache_tsd_boot())
if (tcache_tsd_boot() || tcache_enabled_tsd_boot())
return (true);
}