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Add two KASSERTS which trigger if free(9) would drag the "memuse" statistic

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for a malloc bucket under zero.  This typically happens if you malloc(9)
from one bucket and free to another.
This commit is contained in:
Poul-Henning Kamp 2003-05-05 08:32:53 +00:00
parent 3fd530f7ec
commit 8cb72d6174
1 changed files with 6 additions and 0 deletions
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6
sys/kern/kern_malloc.c
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@ -283,6 +283,9 @@ free(addr, type)
if (addr == NULL)
return;
KASSERT(ksp->ks_memuse > 0,
("malloc(9)/free(9) confusion.\n%s",
"Probably freeing with wrong type, but maybe not here."));
size = 0;
slab = vtoslab((vm_offset_t)addr & (~UMA_SLAB_MASK));
@ -318,6 +321,9 @@ free(addr, type)
uma_large_free(slab);
}
mtx_lock(&ksp->ks_mtx);
KASSERT(size <= ksp->ks_memuse,
("malloc(9)/free(9) confusion.\n%s",
"Probably freeing with wrong type, but maybe not here."));
ksp->ks_memuse -= size;
ksp->ks_inuse--;
mtx_unlock(&ksp->ks_mtx);