diff options
| author | Erlang/OTP <[email protected]> | 2014-11-04 12:21:20 +0100 |
|---|---|---|
| committer | Erlang/OTP <[email protected]> | 2014-11-04 12:21:20 +0100 |
| commit | 04e86b7300706dd76ea927a31e287cf4084434a1 (patch) | |
| tree | edf83c5586ef2060464373000990730b78e09719 | |
| parent | 79cf526f1ccd98706388d1472ec7abdc4aa25bd1 (diff) | |
| parent | 891cc466c957e91c7770f0a91ba83b65a268c2c1 (diff) | |
| download | otp-04e86b7300706dd76ea927a31e287cf4084434a1.tar.gz otp-04e86b7300706dd76ea927a31e287cf4084434a1.tar.bz2 otp-04e86b7300706dd76ea927a31e287cf4084434a1.zip | |
Merge branch 'sverk/cpool_fetch-dc_list-bug/OTP-12249' into maint-17
* sverk/cpool_fetch-dc_list-bug/OTP-12249:
erts: Fix bug when delayed deallocated carrier is reused by cpool_fetch
| -rw-r--r-- | erts/emulator/beam/erl_alloc_util.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_alloc_util.c b/erts/emulator/beam/erl_alloc_util.c index a4e164bf51..55052430e1 100644 --- a/erts/emulator/beam/erl_alloc_util.c +++ b/erts/emulator/beam/erl_alloc_util.c @@ -1775,6 +1775,18 @@ handle_delayed_dealloc(Allctr_t *allctr, * data has been overwritten by the queue. */ Carrier_t *crr = FIRST_BLK_TO_MBC(allctr, blk); + + /* Restore word overwritten by the dd-queue as it will be read + * if this carrier is pulled from dc_list by cpool_fetch() + */ + ERTS_ALC_CPOOL_ASSERT(FBLK_TO_MBC(blk) != crr); + ERTS_ALC_CPOOL_ASSERT(sizeof(ErtsAllctrDDBlock_t) == sizeof(void*)); +#ifdef MBC_ABLK_OFFSET_BITS + blk->u.carrier = crr; +#else + blk->carrier = crr; +#endif + ERTS_ALC_CPOOL_ASSERT(ERTS_ALC_IS_CPOOL_ENABLED(allctr)); ERTS_ALC_CPOOL_ASSERT(allctr == crr->cpool.orig_allctr); ERTS_ALC_CPOOL_ASSERT(((erts_aint_t) allctr) |