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Patch for msan#5

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Merged
alexey-milovidov merged 4 commits into from
Mar 7, 2020
Merged

Patch for msan #5

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d13f672
patch for msan
tavplubix Mar 5, 2020
af43419
add workaround for clang-8
tavplubix Mar 6, 2020
f9c3470
add clobbers for sse registers
tavplubix Mar 6, 2020
09abfe0
fix
tavplubix Mar 6, 2020
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22 changes: 22 additions & 0 deletions crypto/cryptlib.c
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Original file line numberDiff line numberDiff line change
Expand Up@@ -101,6 +101,28 @@ void OPENSSL_cpuid_setup(void)
IA32CAP vec;
const variant_char *env;

#if defined(__has_feature)
# if __has_feature(memory_sanitizer)
/// This function is called from .init section before memory sanitizer mmaps shadow memory.
/// Manually call __msan_init() to initialize it.
/// Otherwise, program will crash with segmentation fault when thying access `trigger`,
/// because its address was replaced with some not mapped address.
#if __clang_major__ >= 9
__msan_init();
#else
/// Workaround for "error in backend: Sanitizer interface function redefined" in clang-8
__asm__ __volatile__("callq __msan_init": : :
"memory", "cc",
"rax", "rcx", "rdx", "rsi", "rdi",
"r8", "r9", "r10", "r11", "st",
"mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7",
"xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7",
"xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15"
);
#endif
# endif
#endif

if (trigger)
return;

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