fe267a5590
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
228 lines
4.9 KiB
C
228 lines
4.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2002, 2003, 2004, 2005 Jeffrey Roberson <jeff@FreeBSD.org>
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* Copyright (c) 2004, 2005 Bosko Milekic <bmilekic@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* uma_dbg.c Debugging features for UMA users
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_vm.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bitset.h>
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#include <sys/kernel.h>
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/malloc.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/uma.h>
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#include <vm/uma_int.h>
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#include <vm/uma_dbg.h>
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#include <vm/memguard.h>
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static const uint32_t uma_junk = 0xdeadc0de;
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/*
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* Checks an item to make sure it hasn't been overwritten since it was freed,
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* prior to subsequent reallocation.
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*
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* Complies with standard ctor arg/return
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*/
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int
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trash_ctor(void *mem, int size, void *arg, int flags)
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{
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int cnt;
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uint32_t *p;
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#ifdef DEBUG_MEMGUARD
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if (is_memguard_addr(mem))
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return (0);
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#endif
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cnt = size / sizeof(uma_junk);
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for (p = mem; cnt > 0; cnt--, p++)
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if (*p != uma_junk) {
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#ifdef INVARIANTS
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panic("Memory modified after free %p(%d) val=%x @ %p\n",
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mem, size, *p, p);
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#else
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printf("Memory modified after free %p(%d) val=%x @ %p\n",
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mem, size, *p, p);
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#endif
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return (0);
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}
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return (0);
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}
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/*
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* Fills an item with predictable garbage
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*
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* Complies with standard dtor arg/return
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*
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*/
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void
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trash_dtor(void *mem, int size, void *arg)
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{
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int cnt;
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uint32_t *p;
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#ifdef DEBUG_MEMGUARD
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if (is_memguard_addr(mem))
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return;
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#endif
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cnt = size / sizeof(uma_junk);
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for (p = mem; cnt > 0; cnt--, p++)
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*p = uma_junk;
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}
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/*
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* Fills an item with predictable garbage
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*
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* Complies with standard init arg/return
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*
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*/
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int
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trash_init(void *mem, int size, int flags)
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{
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trash_dtor(mem, size, NULL);
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return (0);
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}
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/*
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* Checks an item to make sure it hasn't been overwritten since it was freed.
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*
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* Complies with standard fini arg/return
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*
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*/
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void
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trash_fini(void *mem, int size)
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{
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(void)trash_ctor(mem, size, NULL, 0);
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}
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int
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mtrash_ctor(void *mem, int size, void *arg, int flags)
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{
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struct malloc_type **ksp;
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uint32_t *p = mem;
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int cnt;
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#ifdef DEBUG_MEMGUARD
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if (is_memguard_addr(mem))
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return (0);
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#endif
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size -= sizeof(struct malloc_type *);
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ksp = (struct malloc_type **)mem;
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ksp += size / sizeof(struct malloc_type *);
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cnt = size / sizeof(uma_junk);
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for (p = mem; cnt > 0; cnt--, p++)
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if (*p != uma_junk) {
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printf("Memory modified after free %p(%d) val=%x @ %p\n",
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mem, size, *p, p);
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panic("Most recently used by %s\n", (*ksp == NULL)?
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"none" : (*ksp)->ks_shortdesc);
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}
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return (0);
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}
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/*
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* Fills an item with predictable garbage
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*
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* Complies with standard dtor arg/return
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*
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*/
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void
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mtrash_dtor(void *mem, int size, void *arg)
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{
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int cnt;
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uint32_t *p;
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#ifdef DEBUG_MEMGUARD
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if (is_memguard_addr(mem))
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return;
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#endif
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size -= sizeof(struct malloc_type *);
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cnt = size / sizeof(uma_junk);
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for (p = mem; cnt > 0; cnt--, p++)
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*p = uma_junk;
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}
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/*
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* Fills an item with predictable garbage
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*
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* Complies with standard init arg/return
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*
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*/
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int
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mtrash_init(void *mem, int size, int flags)
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{
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struct malloc_type **ksp;
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#ifdef DEBUG_MEMGUARD
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if (is_memguard_addr(mem))
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return (0);
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#endif
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mtrash_dtor(mem, size, NULL);
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ksp = (struct malloc_type **)mem;
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ksp += (size / sizeof(struct malloc_type *)) - 1;
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*ksp = NULL;
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return (0);
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}
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/*
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* Checks an item to make sure it hasn't been overwritten since it was freed,
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* prior to freeing it back to available memory.
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*
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* Complies with standard fini arg/return
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*
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*/
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void
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mtrash_fini(void *mem, int size)
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{
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(void)mtrash_ctor(mem, size, NULL, 0);
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}
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