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Remove magic.

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Remove structure magic, because 1) it is no longer conditional, and 2)
it stopped being very effective at detecting memory corruption several
years ago.
This commit is contained in:
Jason Evans
2012-02-13 10:24:43 -08:00
parent 7372b15a31
commit fd56043c53
7 changed files with 0 additions and 45 deletions
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15
src/arena.c
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@@ -255,7 +255,6 @@ arena_run_reg_alloc(arena_run_t *run, arena_bin_info_t *bin_info)
bitmap_t *bitmap = (bitmap_t *)((uintptr_t)run +
(uintptr_t)bin_info->bitmap_offset);
assert(run->magic == ARENA_RUN_MAGIC);
assert(run->nfree > 0);
assert(bitmap_full(bitmap, &bin_info->bitmap_info) == false);
@@ -758,7 +757,6 @@ arena_chunk_purge(arena_t *arena, arena_chunk_t *chunk)
chunk + (uintptr_t)(pageind << PAGE_SHIFT));
assert((mapelm->bits >> PAGE_SHIFT) == 0);
assert(run->magic == ARENA_RUN_MAGIC);
size_t binind = arena_bin_index(arena,
run->bin);
arena_bin_info_t *bin_info =
@@ -1220,8 +1218,6 @@ arena_bin_nonfull_run_get(arena_t *arena, arena_bin_t *bin)
run->nextind = 0;
run->nfree = bin_info->nregs;
bitmap_init(bitmap, &bin_info->bitmap_info);
if (config_debug)
run->magic = ARENA_RUN_MAGIC;
}
malloc_mutex_unlock(&arena->lock);
/********************************/
@@ -1281,7 +1277,6 @@ arena_bin_malloc_hard(arena_t *arena, arena_bin_t *bin)
* Another thread updated runcur while this one ran without the
* bin lock in arena_bin_nonfull_run_get().
*/
assert(bin->runcur->magic == ARENA_RUN_MAGIC);
assert(bin->runcur->nfree > 0);
ret = arena_run_reg_alloc(bin->runcur, bin_info);
if (run != NULL) {
@@ -1309,7 +1304,6 @@ arena_bin_malloc_hard(arena_t *arena, arena_bin_t *bin)
bin->runcur = run;
assert(bin->runcur->magic == ARENA_RUN_MAGIC);
assert(bin->runcur->nfree > 0);
return (arena_run_reg_alloc(bin->runcur, bin_info));
@@ -1579,7 +1573,6 @@ arena_salloc(const void *ptr)
arena_run_t *run = (arena_run_t *)((uintptr_t)chunk +
(uintptr_t)((pageind - (mapbits >> PAGE_SHIFT)) <<
PAGE_SHIFT));
assert(run->magic == ARENA_RUN_MAGIC);
size_t binind = arena_bin_index(chunk->arena, run->bin);
arena_bin_info_t *bin_info = &arena_bin_info[binind];
assert(((uintptr_t)ptr - ((uintptr_t)run +
@@ -1632,7 +1625,6 @@ arena_salloc_demote(const void *ptr)
arena_run_t *run = (arena_run_t *)((uintptr_t)chunk +
(uintptr_t)((pageind - (mapbits >> PAGE_SHIFT)) <<
PAGE_SHIFT));
assert(run->magic == ARENA_RUN_MAGIC);
size_t binind = arena_bin_index(chunk->arena, run->bin);
arena_bin_info_t *bin_info = &arena_bin_info[binind];
assert(((uintptr_t)ptr - ((uintptr_t)run +
@@ -1727,8 +1719,6 @@ arena_dalloc_bin_run(arena_t *arena, arena_chunk_t *chunk, arena_run_t *run,
((past - run_ind) << PAGE_SHIFT), false);
/* npages = past - run_ind; */
}
if (config_debug)
run->magic = 0;
arena_run_dalloc(arena, run, true);
malloc_mutex_unlock(&arena->lock);
/****************************/
@@ -1785,7 +1775,6 @@ arena_dalloc_bin(arena_t *arena, arena_chunk_t *chunk, void *ptr,
pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> PAGE_SHIFT;
run = (arena_run_t *)((uintptr_t)chunk + (uintptr_t)((pageind -
(mapelm->bits >> PAGE_SHIFT)) << PAGE_SHIFT));
assert(run->magic == ARENA_RUN_MAGIC);
bin = run->bin;
size_t binind = arena_bin_index(arena, bin);
arena_bin_info_t *bin_info = &arena_bin_info[binind];
@@ -2019,7 +2008,6 @@ arena_ralloc_large(void *ptr, size_t oldsize, size_t size, size_t extra,
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
arena = chunk->arena;
assert(arena->magic == ARENA_MAGIC);
if (psize < oldsize) {
/* Fill before shrinking in order avoid a race. */
@@ -2183,9 +2171,6 @@ arena_new(arena_t *arena, unsigned ind)
memset(&bin->stats, 0, sizeof(malloc_bin_stats_t));
}
if (config_debug)
arena->magic = ARENA_MAGIC;
return (false);
}