[compiler-rt] r349645 - [sanitizer_common] Fix sha2 interceptors not to use vars in array len

[Michal Gorny via llvm-commits]

Author: mgorny
Date: Wed Dec 19 09:22:14 2018
New Revision: 349645

URL: http://llvm.org/viewvc/llvm-project?rev=349645&view=rev
Log:
[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

Modified:
    compiler-rt/trunk/lib/sanitizer_common/sanitizer_common_interceptors.inc

Modified: compiler-rt/trunk/lib/sanitizer_common/sanitizer_common_interceptors.inc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/sanitizer_common/sanitizer_common_interceptors.inc?rev=349645&r1=349644&r2=349645&view=diff
==============================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_common_interceptors.inc (original)
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_common_interceptors.inc Wed Dec 19 09:22:14 2018
@@ -8511,9 +8511,10 @@ INTERCEPTOR(char *, MD2Data, const unsig
     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); \