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uvm_unmap_remove: debug check to ensure that 

unmapped regions doesn't have any remaining page mappings.
This commit is contained in:
yamt 2005-01-01 21:12:59 +00:00
parent 592c954dc7
commit 3983ffcfb1
1 changed files with 20 additions and 2 deletions
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22
sys/uvm/uvm_map.c
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_map.c,v 1.176 2005/01/01 21:11:51 yamt Exp $ */
/* $NetBSD: uvm_map.c,v 1.177 2005/01/01 21:12:59 yamt Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -71,7 +71,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.176 2005/01/01 21:11:51 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.177 2005/01/01 21:12:59 yamt Exp $");
#include "opt_ddb.h"
#include "opt_uvmhist.h"
@ -1947,6 +1947,24 @@ uvm_unmap_remove(struct vm_map *map, vaddr_t start, vaddr_t end,
pmap_remove(map->pmap, entry->start, entry->end);
}
#if defined(DEBUG)
if ((entry->flags & UVM_MAP_KMAPENT) == 0) {
/*
* check if there's remaining mapping,
* which is a bug in caller.
*/
vaddr_t va;
for (va = entry->start; va < entry->end;
va += PAGE_SIZE) {
if (pmap_extract(vm_map_pmap(map), va, NULL)) {
panic("uvm_unmap_remove: has mapping");
}
}
}
#endif /* defined(DEBUG) */
/*
* remove entry from map and put it on our list of entries
* that we've nuked. then go to next entry.