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Warn if using a memory sanitizer on AESNI

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Clang-Msan is known to report spurious errors when MBEDTLS_AESNI_C is
enabled, due to the use of assembly code. The error reports don't
mention AES, so they can be difficult to trace back to the use of
AES-NI. Warn about this potential problem at compile time.
This commit is contained in:
Gilles Peskine 2018-04-05 15:25:50 +02:00
parent 32605dc830
commit 5053efde33
1 changed files with 6 additions and 0 deletions
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6
library/aesni.c
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@ -32,6 +32,12 @@
#if defined(MBEDTLS_AESNI_C)
#if defined(__has_feature)
#if __has_feature(memory_sanitizer)
#warning "MBEDTLS_AESNI_C is known to cause spurious error reports with some memory sanitizers as they do not understand the assembly code."
#endif
#endif
#include "mbedtls/aesni.h"
#include <string.h>