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📄 _vm_phys.h(2.27 KB)
📄 _vm_radix.h(1.64 KB)
📄 default_pager.c(4.83 KB)
📄 device_pager.c(13.06 KB)
📄 memguard.c(15.13 KB)
📄 memguard.h(2.35 KB)
📄 phys_pager.c(8.62 KB)
📄 pmap.h(7.06 KB)
📄 redzone.c(4.95 KB)
📄 redzone.h(1.69 KB)
📄 sg_pager.c(6.34 KB)
📄 swap_pager.c(79.57 KB)
📄 swap_pager.h(2.99 KB)
📄 uma.h(22.13 KB)
📄 uma_core.c(141.88 KB)
📄 uma_dbg.c(4.94 KB)
📄 uma_dbg.h(2.09 KB)
📄 uma_int.h(22.27 KB)
📄 vm.h(5.58 KB)
📄 vm_domainset.c(9.29 KB)
📄 vm_domainset.h(2.19 KB)
📄 vm_dumpset.h(2.99 KB)
📄 vm_extern.h(5.87 KB)
📄 vm_fault.c(59.06 KB)
📄 vm_glue.c(15.52 KB)
📄 vm_init.c(7.67 KB)
📄 vm_kern.c(24.67 KB)
📄 vm_kern.h(3.47 KB)
📄 vm_map.c(149.63 KB)
📄 vm_map.h(18.52 KB)
📄 vm_meter.c(17.87 KB)
📄 vm_mmap.c(39.75 KB)
📄 vm_object.c(76.42 KB)
📄 vm_object.h(13.57 KB)
📄 vm_page.c(143.85 KB)
📄 vm_page.h(36.63 KB)
📄 vm_pageout.c(68.44 KB)
📄 vm_pageout.h(3.67 KB)
📄 vm_pagequeue.h(17.26 KB)
📄 vm_pager.c(12.76 KB)
📄 vm_pager.h(8.59 KB)
📄 vm_param.h(4.97 KB)
📄 vm_phys.c(47.32 KB)
📄 vm_phys.h(3.91 KB)
📄 vm_radix.c(23.84 KB)
📄 vm_radix.h(2.47 KB)
📄 vm_reserv.c(42.79 KB)
📄 vm_reserv.h(2.92 KB)
📄 vm_swapout.c(23.8 KB)
📄 vm_swapout_dummy.c(4.15 KB)
📄 vm_unix.c(6.72 KB)
📄 vnode_pager.c(43.39 KB)
📄 vnode_pager.h(2.5 KB)

Editing: uma_dbg.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2002, 2003, 2004, 2005 Jeffrey Roberson <jeff@FreeBSD.org>
 * Copyright (c) 2004, 2005 Bosko Milekic <bmilekic@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * uma_dbg.c	Debugging features for UMA users
 *
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include "opt_vm.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bitset.h>
#include <sys/kernel.h>
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/malloc.h>

#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/uma.h>
#include <vm/uma_int.h>
#include <vm/uma_dbg.h>
#include <vm/memguard.h>

static const uint32_t uma_junk = 0xdeadc0de;

/*
 * Checks an item to make sure it hasn't been overwritten since it was freed,
 * prior to subsequent reallocation.
 *
 * Complies with standard ctor arg/return
 */
int
trash_ctor(void *mem, int size, void *arg, int flags)
{
	int cnt;
	uint32_t *p;

#ifdef DEBUG_MEMGUARD
	if (is_memguard_addr(mem))
		return (0);
#endif

cnt = size / sizeof(uma_junk);

for (p = mem; cnt > 0; cnt--, p++)
		if (*p != uma_junk) {
#ifdef INVARIANTS
			panic("Memory modified after free %p(%d) val=%x @ %p\n",
			    mem, size, *p, p);
#else
			printf("Memory modified after free %p(%d) val=%x @ %p\n",
			    mem, size, *p, p);
#endif
			return (0);
		}
	return (0);
}

/*
 * Fills an item with predictable garbage
 *
 * Complies with standard dtor arg/return
 *
 */
void
trash_dtor(void *mem, int size, void *arg)
{
	int cnt;
	uint32_t *p;

#ifdef DEBUG_MEMGUARD
	if (is_memguard_addr(mem))
		return;
#endif

cnt = size / sizeof(uma_junk);

for (p = mem; cnt > 0; cnt--, p++)
		*p = uma_junk;
}

/*
 * Fills an item with predictable garbage
 *
 * Complies with standard init arg/return
 *
 */
int
trash_init(void *mem, int size, int flags)
{
	trash_dtor(mem, size, NULL);
	return (0);
}

/*
 * Checks an item to make sure it hasn't been overwritten since it was freed.
 *
 * Complies with standard fini arg/return
 *
 */
void
trash_fini(void *mem, int size)
{
	(void)trash_ctor(mem, size, NULL, 0);
}

int
mtrash_ctor(void *mem, int size, void *arg, int flags)
{
	struct malloc_type **ksp;
	uint32_t *p = mem;
	int cnt;

#ifdef DEBUG_MEMGUARD
	if (is_memguard_addr(mem))
		return (0);
#endif

size -= sizeof(struct malloc_type *);
	ksp = (struct malloc_type **)mem;
	ksp += size / sizeof(struct malloc_type *);
	cnt = size / sizeof(uma_junk);

for (p = mem; cnt > 0; cnt--, p++)
		if (*p != uma_junk) {
			printf("Memory modified after free %p(%d) val=%x @ %p\n",
			    mem, size, *p, p);
			panic("Most recently used by %s\n", (*ksp == NULL)?
			    "none" : (*ksp)->ks_shortdesc);
		}
	return (0);
}

/*
 * Fills an item with predictable garbage
 *
 * Complies with standard dtor arg/return
 *
 */
void
mtrash_dtor(void *mem, int size, void *arg)
{
	int cnt;
	uint32_t *p;

#ifdef DEBUG_MEMGUARD
	if (is_memguard_addr(mem))
		return;
#endif

size -= sizeof(struct malloc_type *);
	cnt = size / sizeof(uma_junk);

for (p = mem; cnt > 0; cnt--, p++)
		*p = uma_junk;
}

/*
 * Fills an item with predictable garbage
 *
 * Complies with standard init arg/return
 *
 */
int
mtrash_init(void *mem, int size, int flags)
{
	struct malloc_type **ksp;

#ifdef DEBUG_MEMGUARD
	if (is_memguard_addr(mem))
		return (0);
#endif

mtrash_dtor(mem, size, NULL);

ksp = (struct malloc_type **)mem;
	ksp += (size / sizeof(struct malloc_type *)) - 1;
	*ksp = NULL;
	return (0);
}

/*
 * Checks an item to make sure it hasn't been overwritten since it was freed,
 * prior to freeing it back to available memory.
 *
 * Complies with standard fini arg/return
 *
 */
void
mtrash_fini(void *mem, int size)
{
	(void)mtrash_ctor(mem, size, NULL, 0);
}

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Editing: uma_dbg.c

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