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Fix a Valgrind integration flaw.

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Fix a Valgrind integration flaw that caused Valgrind warnings about
reads of uninitialized memory in internal zero-initialized data
structures (relevant to tcache and prof code).
This commit is contained in:
Jason Evans 2013-10-19 23:48:40 -07:00
parent ff08ef7046
commit dda90f59e2
3 changed files with 25 additions and 9 deletions
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4
include/jemalloc/internal/tcache.h
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@ -313,6 +313,7 @@ tcache_alloc_small(tcache_t *tcache, size_t size, bool zero)
} else if (opt_zero)
memset(ret, 0, size);
}
VALGRIND_MAKE_MEM_UNDEFINED(ret, size);
} else {
if (config_fill && opt_junk) {
arena_alloc_junk_small(ret, &arena_bin_info[binind],
@ -321,7 +322,6 @@ tcache_alloc_small(tcache_t *tcache, size_t size, bool zero)
VALGRIND_MAKE_MEM_UNDEFINED(ret, size);
memset(ret, 0, size);
}
VALGRIND_MAKE_MEM_UNDEFINED(ret, size);
if (config_stats)
tbin->tstats.nrequests++;
@ -368,11 +368,11 @@ tcache_alloc_large(tcache_t *tcache, size_t size, bool zero)
else if (opt_zero)
memset(ret, 0, size);
}
VALGRIND_MAKE_MEM_UNDEFINED(ret, size);
} else {
VALGRIND_MAKE_MEM_UNDEFINED(ret, size);
memset(ret, 0, size);
}
VALGRIND_MAKE_MEM_UNDEFINED(ret, size);
if (config_stats)
tbin->tstats.nrequests++;