228 lines
6.2 KiB
C
228 lines
6.2 KiB
C
/*
|
|
* Check decoding of pread64 and pwrite64 syscalls.
|
|
*
|
|
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
|
|
* Copyright (c) 2016-2018 The strace developers.
|
|
* 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. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include "tests.h"
|
|
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
static void
|
|
dump_str(const char *str, const unsigned int len)
|
|
{
|
|
static const char dots[16] = "................";
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < len; i += 16) {
|
|
unsigned int n = len - i > 16 ? 16 : len - i;
|
|
const char *dump = hexdump_memdup(str + i, n);
|
|
|
|
tprintf(" | %05x %-49s %-16.*s |\n",
|
|
i, dump, n, dots);
|
|
|
|
free((void *) dump);
|
|
}
|
|
}
|
|
|
|
static void
|
|
print_hex(const char *str, const unsigned int len)
|
|
{
|
|
const unsigned char *ustr = (const unsigned char *) str;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
unsigned int c = ustr[i];
|
|
|
|
switch (c) {
|
|
case '\t':
|
|
tprintf("\\t"); break;
|
|
case '\n':
|
|
tprintf("\\n"); break;
|
|
case '\v':
|
|
tprintf("\\v"); break;
|
|
case '\f':
|
|
tprintf("\\f"); break;
|
|
case '\r':
|
|
tprintf("\\r"); break;
|
|
default:
|
|
tprintf("\\%o", ustr[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
test_dump(const unsigned int len)
|
|
{
|
|
static char *buf;
|
|
|
|
if (buf) {
|
|
size_t ps1 = get_page_size() - 1;
|
|
buf = (void *) (((size_t) buf + ps1) & ~ps1) - len;
|
|
} else {
|
|
buf = tail_alloc(len);
|
|
}
|
|
|
|
const off_t offset = 0xdefaceddeadbeefLL + len;
|
|
long rc = pread(0, buf, len, offset);
|
|
if (rc != (int) len)
|
|
perror_msg_and_fail("pread64: expected %d, returned %ld",
|
|
len, rc);
|
|
|
|
tprintf("%s(%d, \"", "pread64", 0);
|
|
print_hex(buf, len);
|
|
tprintf("\", %d, %lld) = %ld\n", len, (long long) offset, rc);
|
|
dump_str(buf, len);
|
|
|
|
unsigned int i;
|
|
for (i = 0; i < len; ++i)
|
|
buf[i] = i;
|
|
|
|
rc = pwrite(1, buf, len, offset);
|
|
if (rc != (int) len)
|
|
perror_msg_and_fail("pwrite64: expected %d, returned %ld",
|
|
len, rc);
|
|
|
|
tprintf("%s(%d, \"", "pwrite64", 1);
|
|
print_hex(buf, len);
|
|
tprintf("\", %d, %lld) = %ld\n", len, (long long) offset, rc);
|
|
dump_str(buf, len);
|
|
|
|
if (!len)
|
|
buf = 0;
|
|
}
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
tprintf("%s", "");
|
|
|
|
skip_if_unavailable("/proc/self/fd/");
|
|
|
|
static const char tmp[] = "pread64-pwrite64-tmpfile";
|
|
if (open(tmp, O_CREAT|O_RDONLY|O_TRUNC, 0600) != 0)
|
|
perror_msg_and_fail("creat: %s", tmp);
|
|
if (open(tmp, O_WRONLY) != 1)
|
|
perror_msg_and_fail("open: %s", tmp);
|
|
|
|
char *nil = tail_alloc(1);
|
|
*nil = '\0';
|
|
|
|
static const char w_c[] = "0123456789abcde";
|
|
const unsigned int w_len = LENGTH_OF(w_c);
|
|
const char *w_d = hexdump_strdup(w_c);
|
|
const void *w = tail_memdup(w_c, w_len);
|
|
|
|
static const char r0_c[] = "01234567";
|
|
const char *r0_d = hexdump_strdup(r0_c);
|
|
const unsigned int r0_len = (w_len + 1) / 2;
|
|
void *r0 = tail_alloc(r0_len);
|
|
|
|
static const char r1_c[] = "89abcde";
|
|
const char *r1_d = hexdump_strdup(r1_c);
|
|
const unsigned int r1_len = w_len - r0_len;
|
|
void *r1 = tail_alloc(w_len);
|
|
|
|
void *efault = r1 - get_page_size();
|
|
|
|
long rc;
|
|
|
|
rc = pwrite(1, w, 0, 0);
|
|
if (rc)
|
|
perror_msg_and_fail("pwrite64: expected 0, returned %ld", rc);
|
|
tprintf("pwrite64(1, \"\", 0, 0) = 0\n");
|
|
|
|
rc = pwrite(1, efault, 1, 0);
|
|
if (rc != -1)
|
|
perror_msg_and_fail("pwrite64: expected -1 EFAULT"
|
|
", returned %ld", rc);
|
|
tprintf("pwrite64(1, %p, 1, 0) = -1 EFAULT (%m)\n", efault);
|
|
|
|
rc = pwrite(1, nil, 1, -3);
|
|
if (rc != -1)
|
|
perror_msg_and_fail("pwrite64: expected -1, returned %ld", rc);
|
|
tprintf("pwrite64(1, \"\\0\", 1, -3) = -1 EINVAL (%m)\n");
|
|
dump_str(nil, 1);
|
|
|
|
rc = pwrite(1, w, w_len, 0);
|
|
if (rc != (int) w_len)
|
|
perror_msg_and_fail("pwrite64: expected %u, returned %ld",
|
|
w_len, rc);
|
|
tprintf("pwrite64(1, \"%s\", %u, 0) = %ld\n"
|
|
" | 00000 %-49s %-16s |\n",
|
|
w_c, w_len, rc, w_d, w_c);
|
|
close(1);
|
|
|
|
rc = pread(0, r0, 0, 0);
|
|
if (rc)
|
|
perror_msg_and_fail("pread64: expected 0, returned %ld", rc);
|
|
tprintf("pread64(0, \"\", 0, 0) = 0\n");
|
|
|
|
rc = pread(0, efault, 1, 0);
|
|
if (rc != -1)
|
|
perror_msg_and_fail("pread64: expected -1, returned %ld", rc);
|
|
tprintf("pread64(0, %p, 1, 0) = -1 EFAULT (%m)\n", efault);
|
|
|
|
rc = pread(0, efault, 2, -7);
|
|
if (rc != -1)
|
|
perror_msg_and_fail("pread64: expected -1, returned %ld", rc);
|
|
tprintf("pread64(0, %p, 2, -7) = -1 EINVAL (%m)\n", efault);
|
|
|
|
rc = pread(0, r0, r0_len, 0);
|
|
if (rc != (int) r0_len)
|
|
perror_msg_and_fail("pread64: expected %u, returned %ld",
|
|
r0_len, rc);
|
|
tprintf("pread64(0, \"%s\", %u, 0) = %ld\n"
|
|
" | 00000 %-49s %-16s |\n",
|
|
r0_c, r0_len, rc, r0_d, r0_c);
|
|
|
|
rc = pread(0, r1, w_len, r0_len);
|
|
if (rc != (int) r1_len)
|
|
perror_msg_and_fail("pread64: expected %u, returned %ld",
|
|
r1_len, rc);
|
|
tprintf("pread64(0, \"%s\", %u, %u) = %ld\n"
|
|
" | 00000 %-49s %-16s |\n",
|
|
r1_c, w_len, r0_len, rc, r1_d, r1_c);
|
|
close(0);
|
|
|
|
if (open("/dev/zero", O_RDONLY))
|
|
perror_msg_and_fail("open");
|
|
|
|
if (open("/dev/null", O_WRONLY) != 1)
|
|
perror_msg_and_fail("open");
|
|
|
|
unsigned int i;
|
|
for (i = 0; i <= 32; ++i)
|
|
test_dump(i);
|
|
|
|
tprintf("+++ exited with 0 +++\n");
|
|
return 0;
|
|
}
|