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Implement Valgrind support, redzones, and quarantine.

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Implement Valgrind support, as well as the redzone and quarantine
features, which help Valgrind detect memory errors.  Redzones are only
implemented for small objects because the changes necessary to support
redzones around large and huge objects are complicated by in-place
reallocation, to the point that it isn't clear that the maintenance
burden is worth the incremental improvement to Valgrind support.

Merge arena_salloc() and arena_salloc_demote().

Refactor i[v]salloc() to expose the 'demote' option.
This commit is contained in:
Jason Evans
2012-04-06 00:35:09 -07:00
parent a1ee7838e1
commit 122449b073
20 changed files with 840 additions and 170 deletions
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29
include/jemalloc/internal/tcache.h
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@@ -340,17 +340,24 @@ tcache_alloc_small(tcache_t *tcache, size_t size, bool zero)
if (ret == NULL)
return (NULL);
}
assert(arena_salloc(ret) == arena_bin_info[binind].reg_size);
assert(arena_salloc(ret, false) == arena_bin_info[binind].reg_size);
if (zero == false) {
if (config_fill) {
if (opt_junk)
memset(ret, 0xa5, size);
else if (opt_zero)
if (opt_junk) {
arena_alloc_junk_small(ret,
&arena_bin_info[binind], false);
} else if (opt_zero)
memset(ret, 0, size);
}
} else
} else {
if (config_fill && opt_junk) {
arena_alloc_junk_small(ret, &arena_bin_info[binind],
true);
}
VALGRIND_MAKE_MEM_UNDEFINED(ret, size);
memset(ret, 0, size);
}
if (config_stats)
tbin->tstats.nrequests++;
@@ -397,8 +404,10 @@ tcache_alloc_large(tcache_t *tcache, size_t size, bool zero)
else if (opt_zero)
memset(ret, 0, size);
}
} else
} else {
VALGRIND_MAKE_MEM_UNDEFINED(ret, size);
memset(ret, 0, size);
}
if (config_stats)
tbin->tstats.nrequests++;
@@ -422,7 +431,7 @@ tcache_dalloc_small(tcache_t *tcache, void *ptr)
size_t pageind, binind;
arena_chunk_map_t *mapelm;
assert(arena_salloc(ptr) <= SMALL_MAXCLASS);
assert(arena_salloc(ptr, false) <= SMALL_MAXCLASS);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
arena = chunk->arena;
@@ -436,7 +445,7 @@ tcache_dalloc_small(tcache_t *tcache, void *ptr)
assert(binind < NBINS);
if (config_fill && opt_junk)
memset(ptr, 0x5a, arena_bin_info[binind].reg_size);
arena_dalloc_junk_small(ptr, &arena_bin_info[binind]);
tbin = &tcache->tbins[binind];
tbin_info = &tcache_bin_info[binind];
@@ -459,8 +468,8 @@ tcache_dalloc_large(tcache_t *tcache, void *ptr, size_t size)
tcache_bin_info_t *tbin_info;
assert((size & PAGE_MASK) == 0);
assert(arena_salloc(ptr) > SMALL_MAXCLASS);
assert(arena_salloc(ptr) <= tcache_maxclass);
assert(arena_salloc(ptr, false) > SMALL_MAXCLASS);
assert(arena_salloc(ptr, false) <= tcache_maxclass);
binind = NBINS + (size >> LG_PAGE) - 1;