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Add arena-level name.

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An arena-level name can help identify manual arenas.
This commit is contained in:
Guangli Dai 2022-09-01 16:42:56 -07:00 • committed by Qi Wang
parent a0734fd6ee
commit ba19d2cb78
8 changed files with 146 additions and 9 deletions
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67
src/ctl.c
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@ -170,6 +170,7 @@ CTL_PROTO(arena_i_dirty_decay_ms)
CTL_PROTO(arena_i_muzzy_decay_ms)
CTL_PROTO(arena_i_extent_hooks)
CTL_PROTO(arena_i_retain_grow_limit)
CTL_PROTO(arena_i_name)
INDEX_PROTO(arena_i)
CTL_PROTO(arenas_bin_i_size)
CTL_PROTO(arenas_bin_i_nregs)
@ -504,11 +505,12 @@ static const ctl_named_node_t arena_i_node[] = {
* Undocumented for now, since we anticipate an arena API in flux after
* we cut the last 5-series release.
*/
{NAME("oversize_threshold"), CTL(arena_i_oversize_threshold)},
{NAME("dirty_decay_ms"), CTL(arena_i_dirty_decay_ms)},
{NAME("muzzy_decay_ms"), CTL(arena_i_muzzy_decay_ms)},
{NAME("extent_hooks"), CTL(arena_i_extent_hooks)},
{NAME("retain_grow_limit"), CTL(arena_i_retain_grow_limit)}
{NAME("oversize_threshold"), CTL(arena_i_oversize_threshold)},
{NAME("dirty_decay_ms"), CTL(arena_i_dirty_decay_ms)},
{NAME("muzzy_decay_ms"), CTL(arena_i_muzzy_decay_ms)},
{NAME("extent_hooks"), CTL(arena_i_extent_hooks)},
{NAME("retain_grow_limit"), CTL(arena_i_retain_grow_limit)},
{NAME("name"), CTL(arena_i_name)}
};
static const ctl_named_node_t super_arena_i_node[] = {
{NAME(""), CHILD(named, arena_i)}
@ -2983,6 +2985,61 @@ label_return:
return ret;
}
/*
* When writing, newp should point to a char array storing the name to be set.
* A name longer than ARENA_NAME_LEN will be arbitrarily cut. When reading,
* oldp should point to a char array whose length is no shorter than
* ARENA_NAME_LEN or the length of the name when it was set.
*/
static int
arena_i_name_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
int ret;
unsigned arena_ind;
char *name;
malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
MIB_UNSIGNED(arena_ind, 1);
if (arena_ind == MALLCTL_ARENAS_ALL || arena_ind >=
ctl_arenas->narenas) {
ret = EINVAL;
goto label_return;
}
arena_t *arena = arena_get(tsd_tsdn(tsd), arena_ind, false);
if (arena == NULL) {
ret = EFAULT;
goto label_return;
}
if (oldp != NULL && oldlenp != NULL) {
/*
* Read the arena name. When reading, the input oldp should
* point to an array with a length no shorter than
* ARENA_NAME_LEN or the length when it was set.
*/
if (*oldlenp != sizeof(char *)) {
ret = EINVAL;
goto label_return;
}
name = *(char **)oldp;
arena_name_get(arena, name);
}
if (newp != NULL) {
/* Write the arena name. */
WRITE(name, char *);
if (name == NULL) {
ret = EINVAL;
goto label_return;
}
arena_name_set(arena, name);
}
ret = 0;
label_return:
malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx);
return ret;
}
static const ctl_named_node_t *
arena_i_index(tsdn_t *tsdn, const size_t *mib, size_t miblen,
size_t i) {