[compiler-rt] [asan] Add experimental 'poison_history_size' flag (PR #133175)

[Vitaly Buka via llvm-commits]

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@@ -20,11 +20,70 @@
 #include "sanitizer_common/sanitizer_flags.h"
 #include "sanitizer_common/sanitizer_interface_internal.h"
 #include "sanitizer_common/sanitizer_libc.h"
+#include "sanitizer_common/sanitizer_ring_buffer.h"
+#include "sanitizer_common/sanitizer_stackdepot.h"
 
 namespace __asan {
 
+using PoisonRecordRingBuffer = RingBuffer<struct PoisonRecord>;
+
 static atomic_uint8_t can_poison_memory;
 
+static Mutex poison_records_mutex;
+static PoisonRecordRingBuffer *poison_records = nullptr;
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vitalybuka wrote:

SANITIZER_GUARDED_BY(poison_records_mutex)

https://github.com/llvm/llvm-project/pull/133175