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mdbx: don't touch mm_psize and mm_flags while provoking bad readers (debug-only).

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This commit is contained in:
Leo Yuriev 2018-08-23 16:13:47 +03:00
parent 8364427d02
commit f58185afa6
1 changed files with 5 additions and 3 deletions
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8
src/mdbx.c
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@ -4914,9 +4914,11 @@ static int mdbx_sync_locked(MDBX_env *env, unsigned flags,
target->mm_datasync_sign = MDBX_DATASIGN_WEAK;
mdbx_meta_update_begin(env, target, pending->mm_txnid_a);
#ifndef NDEBUG
/* debug: provoke failure to catch a violators */
memset(target->mm_dbs, 0xCC,
sizeof(target->mm_dbs) + sizeof(target->mm_canary));
/* debug: provoke failure to catch a violators, but don't touch mm_psize
* and mm_flags to allow readers catch actual pagesize. */
uint8_t *provoke_begin = (uint8_t *)&target->mm_dbs[FREE_DBI].md_root;
uint8_t *provoke_end = (uint8_t *)&target->mm_datasync_sign;
memset(provoke_begin, 0xCC, provoke_end - provoke_begin);
mdbx_jitter4testing(false);
#endif