/*
* Copyright (c) 1999 - 2004 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* 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, 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.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#include <stdio.h>
#include <string.h>
#include <err.h>
#include "roken.h"
#include "test-mem.h"
RCSID("$Id: test-mem.c 21005 2007-06-08 01:54:35Z lha $");
/* #undef HAVE_MMAP */
struct {
void *start;
size_t size;
void *data_start;
size_t data_size;
enum rk_test_mem_type type;
int fd;
} map;
struct sigaction sa, osa;
char *testname;
static RETSIGTYPE
segv_handler(int sig)
{
int fd;
char msg[] = "SIGSEGV i current test: ";
fd = open("/dev/stdout", O_WRONLY, 0600);
if (fd >= 0) {
write(fd, msg, sizeof(msg) - 1);
write(fd, testname, strlen(testname));
write(fd, "\n", 1);
close(fd);
}
_exit(1);
}
#define TESTREC() \
if (testname) \
errx(1, "test %s run recursively on %s", name, testname); \
testname = strdup(name); \
if (testname == NULL) \
errx(1, "malloc");
void * ROKEN_LIB_FUNCTION
rk_test_mem_alloc(enum rk_test_mem_type type, const char *name,
void *buf, size_t size)
{
#ifndef HAVE_MMAP
unsigned char *p;
TESTREC();
p = malloc(size + 2);
if (p == NULL)
errx(1, "malloc");
map.type = type;
map.start = p;
map.size = size + 2;
p[0] = 0xff;
p[map.size] = 0xff;
map.data_start = p + 1;
#else
unsigned char *p;
int flags, ret, fd;
size_t pagesize = getpagesize();
TESTREC();
map.type = type;
#ifdef MAP_ANON
flags = MAP_ANON;
fd = -1;
#else
flags = 0;
fd = open ("/dev/zero", O_RDONLY);
if(fd < 0)
err (1, "open /dev/zero");
#endif
map.fd = fd;
flags |= MAP_PRIVATE;
map.size = size + pagesize - (size % pagesize) + pagesize * 2;
p = (unsigned char *)mmap(0, map.size, PROT_READ | PROT_WRITE,
flags, fd, 0);
if (p == (unsigned char *)MAP_FAILED)
err (1, "mmap");
map.start = p;
ret = mprotect ((void *)p, pagesize, 0);
if (ret < 0)
err (1, "mprotect");
ret = mprotect (p + map.size - pagesize, pagesize, 0);
if (ret < 0)
err (1, "mprotect");
switch (type) {
case RK_TM_OVERRUN:
map.data_start = p + map.size - pagesize - size;
break;
case RK_TM_UNDERRUN:
map.data_start = p + pagesize;
break;
default:
abort();
}
#endif
sigemptyset (&sa.sa_mask);
sa.sa_flags = 0;
#ifdef SA_RESETHAND
sa.sa_flags |= SA_RESETHAND;
#endif
sa.sa_handler = segv_handler;
sigaction (SIGSEGV, &sa, &osa);
map.data_size = size;
if (buf)
memcpy(map.data_start, buf, size);
return map.data_start;
}
void ROKEN_LIB_FUNCTION
rk_test_mem_free(const char *map_name)
{
#ifndef HAVE_MMAP
unsigned char *p = map.start;
if (testname == NULL)
errx(1, "test_mem_free call on no free");
if (p[0] != 0xff)
errx(1, "%s: %s underrun %x\n", testname, map_name, p[0]);
if (p[map.size] != 0xff)
errx(1, "%s: %s overrun %x\n", testname, map_name, p[map.size - 1]);
free(map.start);
#else
int ret;
if (testname == NULL)
errx(1, "test_mem_free call on no free");
ret = munmap (map.start, map.size);
if (ret < 0)
err (1, "munmap");
if (map.fd > 0)
close(map.fd);
#endif
free(testname);
testname = NULL;
sigaction (SIGSEGV, &osa, NULL);
}
