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Issue #175: disable the fast-and-loose code in hashlittle() when running with AddressSanitizer.

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Eric Haszlakiewicz
2016-06-08 03:24:59 +00:00
parent ae66b24369
commit f285c0a2e5
1 changed files with 12 additions and 1 deletions
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13
linkhash.c
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@@ -289,8 +289,19 @@ static uint32_t hashlittle( const void *key, size_t length, uint32_t initval)
* does it on word boundaries, so is OK with this. But VALGRIND will * does it on word boundaries, so is OK with this. But VALGRIND will
* still catch it and complain. The masking trick does make the hash * still catch it and complain. The masking trick does make the hash
* noticably faster for short strings (like English words). * noticably faster for short strings (like English words).
* AddressSanitizer is similarly picky about overrunning
* the buffer. (http://clang.llvm.org/docs/AddressSanitizer.html
*/ */
#ifndef VALGRIND #ifdef VALGRIND
# define PRECISE_MEMORY_ACCESS 1
#elif defined(__SANITIZE_ADDRESS__) /* GCC's ASAN */
# define PRECISE_MEMORY_ACCESS 1
#elif defined(__has_feature)
# if __has_feature(address_sanitizer) /* Clang's ASAN */
# define PRECISE_MEMORY_ACCESS 1
# endif
#endif
#ifndef PRECISE_MEMORY_ACCESS
switch(length) switch(length)
{ {