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3 Commits

Author SHA1 Message Date
Qi Wang d660683d3d Fix test config of lg_san_uaf_align. 
The option may be configure-disabled, which resulted in the invalid options
output from the tests.
 2022-01-04 11:03:51 -08:00
Qi Wang e491cef9ab Add stats for stashed bytes in tcache. 2021-12-29 14:44:43 -08:00
Qi Wang b75822bc6e Implement use-after-free detection using junk and stash. 
On deallocation, sampled pointers (specially aligned) get junked and stashed
into tcache (to prevent immediate reuse).  The expected behavior is to have
read-after-free corrupted and stopped by the junk-filling, while
write-after-free is checked when flushing the stashed pointers.
 2021-12-29 14:44:43 -08:00