lihao/jemalloc
1
0
Fork 0
mirror of https://github.com/jemalloc/jemalloc.git synced 2026-07-23 21:23:06 +00:00
Code Issues Packages Projects Releases Wiki Activity

Avoid arena->offset_state when tsd not available for prng.

Browse Source 
Use stack locals and remove the offset_state in arena.
This commit is contained in:
Qi Wang
2019-11-04 16:44:37 -08:00
committed by Qi Wang
parent d01b425e5d
commit 19a51abf33
3 changed files with 2 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/extent.c
View File

@@ -187,8 +187,8 @@ extent_addr_randomize(tsdn_t *tsdn, arena_t *arena, extent_t *extent,
r = (size_t)prng_lg_range_u64(
tsd_offset_statep_get(tsd), lg_range);
} else {
r = prng_lg_range_zu(&arena->offset_state, lg_range,
true);
uint64_t stack_value = (uint64_t)(uintptr_t)&r;
r = (size_t)prng_lg_range_u64(&stack_value, lg_range);
}
uintptr_t random_offset = ((uintptr_t)r) << (LG_PAGE -
lg_range);