Call __asan_free_hook() before marking the chunk quarantinned
Summary: With this change, the user may safely call __asan_get_ownership() from malloc/free hooks and assume it would return "true". If there is a realloc/free race, free hook might be called twice, but I think it's acceptable, as it's a data race and would later be reported anyway. This change also fixes a bug when failing realloc incorrectly marked the original memory as "quarantinned". Reviewers: timurrrr, kcc, samsonov Reviewed By: samsonov CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D913 llvm-svn: 183220
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