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[sanitizer_common] Fix sha2 interceptors not to use vars in array len 

Fix the sha2 interceptor macros to use a constant for array parameter
length rather than referencing the extern variable.  Since the digest
length is provided in hash name, reuse the macro parameter for it.
Verify that the calculated value matches the one provided by system
headers.

Differential Revision: https://reviews.llvm.org/D55811

llvm-svn: 349645
This commit is contained in:
Michal Gorny 2018-12-19 17:22:14 +00:00
parent ce28791e20
commit 0f71c17e7c
1 changed files with 2 additions and 1 deletions
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3
compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
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@ -8511,9 +8511,10 @@ INTERCEPTOR(char *, MD2Data, const unsigned char *data, unsigned int len,
if (context) \
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, context, SHA##LEN##_CTX_sz); \
} \
INTERCEPTOR(void, SHA##LEN##_Final, u8 digest[SHA##LEN##_digest_length], \
INTERCEPTOR(void, SHA##LEN##_Final, u8 digest[LEN/8], \
void *context) { \
void *ctx; \
CHECK_EQ(SHA##LEN##_digest_length, LEN/8); \
COMMON_INTERCEPTOR_ENTER(ctx, SHA##LEN##_Final, digest, context); \
if (context) \
COMMON_INTERCEPTOR_READ_RANGE(ctx, context, SHA##LEN##_CTX_sz); \