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authorEnna1 <xumingjie.enna1@bytedance.com>2023-05-27 10:27:28 +0800
committerEnna1 <xumingjie.enna1@bytedance.com>2023-05-27 10:27:50 +0800
commitb33dcc5b1eda6a564138b0e86f726abf269fb561 (patch)
tree6bf248372de9c80d15e9c9b4d53cf97728895f28 /llvm/lib/CodeGen/MachineOperand.cpp
parentaf7aea365a2ae8dc51938a614353e1586072ef83 (diff)
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[hwasan] support hwasan-match-all-tag flag for callback memory access instrumentation
Currently, hwasan-match-all-tag flag is supported in inline memory access instrumentation and outline memory access instrumentation, but not supported in callback memory access instrumentation. - For inline memory access instrumentation: a hwasan-match-all-tag check is added following the tag-mismtach check, if tag from pointer is mismatched with tag from shadow memory and tag from pointer is not equal with hwasan-match-all-tag, then a tag-mismatch will be report. - For outline memory acess instrumentation: MatchAllTag is encoded in AccessInfo, when emit HWASAN memaccess symbols, asm-printer emits assembly instructions to check if tag from pointer is equal with hwasan-match-all-tag. - For callback memory access instrumentation: hwasan-match-all-tag check is not implemented in `__hwasan_load`/`__hwasan_store`. This patch implements a set of callback functions: `__hwasan_[load|store][1|2|4|8|16|n]_match_all` and `__hwasan_load[load|store][1|2|4|8|16|n]_match_all_noabort`, making hwasan-match-all-tag flag working for callback memory access instrumentation. Reviewed By: vitalybuka Differential Revision: https://reviews.llvm.org/D149580
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