crypto/external/bsd/heimdal/dist/lib/roken/test-mem.c

   1 /*      $NetBSD: test-mem.c,v 1.1.1.1 2011/04/13 18:15:43 elric Exp $   */
   2
   3 /*
   4  * Copyright (c) 1999 - 2004 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <config.h>
  37
  38 #ifdef HAVE_SYS_MMAN_H
  39 #include <sys/mman.h>
  40 #endif
  41 #include <stdio.h>
  42 #include <string.h>
  43 #include <err.h>
  44 #include <krb5/roken.h>
  45
  46 #include "test-mem.h"
  47
  48 /* #undef HAVE_MMAP */
  49
  50 struct {
  51     void *start;
  52     size_t size;
  53     void *data_start;
  54     size_t data_size;
  55     enum rk_test_mem_type type;
  56     int fd;
  57 } map;
  58
  59 #ifdef HAVE_SIGACTION
  60
  61 struct sigaction sa, osa;
  62
  63 #else
  64
  65 void (* osigh)(int);
  66
  67 #endif
  68
  69 char *testname;
  70
  71 static RETSIGTYPE
  72 segv_handler(int sig)
  73 {
  74     int fd;
  75     char msg[] = "SIGSEGV i current test: ";
  76
  77     fd = open("/dev/stdout", O_WRONLY, 0600);
  78     if (fd >= 0) {
  79         (void)write(fd, msg, sizeof(msg) - 1);
  80         (void)write(fd, testname, strlen(testname));
  81         (void)write(fd, "\n", 1);
  82         close(fd);
  83     }
  84     _exit(1);
  85 }
  86
  87 #define TESTREC()                                                       \
  88     if (testname)                                                       \
  89         errx(1, "test %s run recursively on %s", name, testname);       \
  90     testname = strdup(name);                                            \
  91     if (testname == NULL)                                               \
  92         errx(1, "malloc");
  93
  94
  95 ROKEN_LIB_FUNCTION void * ROKEN_LIB_CALL
  96 rk_test_mem_alloc(enum rk_test_mem_type type, const char *name,
  97                   void *buf, size_t size)
  98 {
  99 #ifndef HAVE_MMAP
 100     unsigned char *p;
 101
 102     TESTREC();
 103
 104     p = malloc(size + 2);
 105     if (p == NULL)
 106         errx(1, "malloc");
 107     map.type = type;
 108     map.start = p;
 109     map.size = size + 2;
 110     p[0] = 0xff;
 111     p[map.size-1] = 0xff;
 112     map.data_start = p + 1;
 113 #else
 114     unsigned char *p;
 115     int flags, ret, fd;
 116     size_t pagesize = getpagesize();
 117
 118     TESTREC();
 119
 120     map.type = type;
 121
 122 #ifdef MAP_ANON
 123     flags = MAP_ANON;
 124     fd = -1;
 125 #else
 126     flags = 0;
 127     fd = open ("/dev/zero", O_RDONLY);
 128     if(fd < 0)
 129         err (1, "open /dev/zero");
 130 #endif
 131     map.fd = fd;
 132     flags |= MAP_PRIVATE;
 133
 134     map.size = size + pagesize - (size % pagesize) + pagesize * 2;
 135
 136     p = (unsigned char *)mmap(0, map.size, PROT_READ | PROT_WRITE,
 137                               flags, fd, 0);
 138     if (p == (unsigned char *)MAP_FAILED)
 139         err (1, "mmap");
 140
 141     map.start = p;
 142
 143     ret = mprotect ((void *)p, pagesize, 0);
 144     if (ret < 0)
 145         err (1, "mprotect");
 146
 147     ret = mprotect (p + map.size - pagesize, pagesize, 0);
 148     if (ret < 0)
 149         err (1, "mprotect");
 150
 151     switch (type) {
 152     case RK_TM_OVERRUN:
 153         map.data_start = p + map.size - pagesize - size;
 154         break;
 155     case RK_TM_UNDERRUN:
 156         map.data_start = p + pagesize;
 157         break;
 158     default:
 159         abort();
 160     }
 161 #endif
 162 #ifdef HAVE_SIGACTION
 163     sigemptyset (&sa.sa_mask);
 164     sa.sa_flags = 0;
 165 #ifdef SA_RESETHAND
 166     sa.sa_flags |= SA_RESETHAND;
 167 #endif
 168     sa.sa_handler = segv_handler;
 169     sigaction (SIGSEGV, &sa, &osa);
 170 #else
 171     osigh = signal(SIGSEGV, segv_handler);
 172 #endif
 173
 174     map.data_size = size;
 175     if (buf)
 176         memcpy(map.data_start, buf, size);
 177     return map.data_start;
 178 }
 179
 180 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
 181 rk_test_mem_free(const char *map_name)
 182 {
 183 #ifndef HAVE_MMAP
 184     unsigned char *p = map.start;
 185
 186     if (testname == NULL)
 187         errx(1, "test_mem_free call on no free");
 188
 189     if (p[0] != 0xff)
 190         errx(1, "%s: %s underrun %x\n", testname, map_name, p[0]);
 191     if (p[map.size-1] != 0xff)
 192         errx(1, "%s: %s overrun %x\n", testname, map_name, p[map.size - 1]);
 193     free(map.start);
 194 #else
 195     int ret;
 196
 197     if (testname == NULL)
 198         errx(1, "test_mem_free call on no free");
 199
 200     ret = munmap (map.start, map.size);
 201     if (ret < 0)
 202         err (1, "munmap");
 203     if (map.fd > 0)
 204         close(map.fd);
 205 #endif
 206     free(testname);
 207     testname = NULL;
 208
 209 #ifdef HAVE_SIGACTION
 210     sigaction (SIGSEGV, &osa, NULL);
 211 #else
 212     signal (SIGSEGV, osigh);
 213 #endif
 214 }