238 lines
7.1 KiB
C
238 lines
7.1 KiB
C
/*
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* Check decoding of preadv2 and pwritev2 syscalls.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2016-2018 The strace developers.
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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, this list of conditions and the following 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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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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#include "tests.h"
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#include <asm/unistd.h>
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#include "scno.h"
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#if defined __NR_preadv2 && defined __NR_pwritev2
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# include <errno.h>
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# include <fcntl.h>
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# include <stdio.h>
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# include <sys/uio.h>
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# include <unistd.h>
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static int
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pr(const int fd, const struct iovec *const vec,
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const unsigned long vlen, const unsigned long pos)
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{
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return syscall(__NR_preadv2, fd, vec, vlen, pos, 0L, 0L);
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}
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static int
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pw(const int fd, const struct iovec *const vec,
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const unsigned long vlen, const unsigned long pos)
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{
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return syscall(__NR_pwritev2, fd, vec, vlen, pos, 0L, 0L);
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}
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static void
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dumpio(void)
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{
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static char tmp[] = "preadv2-pwritev2-tmpfile";
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if (open(tmp, O_CREAT|O_RDONLY|O_TRUNC, 0600) != 0)
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perror_msg_and_fail("creat: %s", tmp);
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if (open(tmp, O_WRONLY) != 1)
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perror_msg_and_fail("open: %s", tmp);
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if (unlink(tmp))
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perror_msg_and_fail("unlink: %s", tmp);
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static const char w0_c[] = "012";
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const char *w0_d = hexdump_strdup(w0_c);
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void *w0 = tail_memdup(w0_c, LENGTH_OF(w0_c));
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static const char w1_c[] = "34567";
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const char *w1_d = hexdump_strdup(w1_c);
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void *w1 = tail_memdup(w1_c, LENGTH_OF(w1_c));
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static const char w2_c[] = "89abcde";
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const char *w2_d = hexdump_strdup(w2_c);
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void *w2 = tail_memdup(w2_c, LENGTH_OF(w2_c));
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long rc;
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static const char r0_c[] = "01234567";
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const char *r0_d = hexdump_strdup(r0_c);
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static const char r1_c[] = "89abcde";
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const char *r1_d = hexdump_strdup(r1_c);
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const struct iovec w_iov_[] = {
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{
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.iov_base = w0,
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.iov_len = LENGTH_OF(w0_c)
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}, {
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.iov_base = w1,
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.iov_len = LENGTH_OF(w1_c)
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}, {
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.iov_base = w2,
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.iov_len = LENGTH_OF(w2_c)
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}
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};
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const struct iovec *w_iov = tail_memdup(w_iov_, sizeof(w_iov_));
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rc = pw(1, w_iov, 0, 0);
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if (rc)
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perror_msg_and_fail("pwritev2: expected 0, returned %ld", rc);
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tprintf("pwritev2(1, [], 0, 0, 0) = 0\n");
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rc = pw(1, w_iov + ARRAY_SIZE(w_iov_) - 1, 2, 0);
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tprintf("pwritev2(1, [{iov_base=\"%s\", iov_len=%u}, ... /* %p */], 2, 0, 0)"
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" = %ld %s (%m)\n",
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w2_c, LENGTH_OF(w2_c), w_iov + ARRAY_SIZE(w_iov_),
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rc, errno2name());
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const unsigned int w_len =
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LENGTH_OF(w0_c) + LENGTH_OF(w1_c) + LENGTH_OF(w2_c);
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rc = pw(1, w_iov, ARRAY_SIZE(w_iov_), 0);
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if (rc != (int) w_len)
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perror_msg_and_fail("pwritev2: expected %u, returned %ld",
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w_len, rc);
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close(1);
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tprintf("pwritev2(1, [{iov_base=\"%s\", iov_len=%u}"
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", {iov_base=\"%s\", iov_len=%u}"
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", {iov_base=\"%s\", iov_len=%u}], %u, 0, 0) = %u\n"
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" * %u bytes in buffer 0\n"
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" | 00000 %-49s %-16s |\n"
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" * %u bytes in buffer 1\n"
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" | 00000 %-49s %-16s |\n"
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" * %u bytes in buffer 2\n"
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" | 00000 %-49s %-16s |\n",
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w0_c, LENGTH_OF(w0_c), w1_c, LENGTH_OF(w1_c),
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w2_c, LENGTH_OF(w2_c), (unsigned int) ARRAY_SIZE(w_iov_), w_len,
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LENGTH_OF(w0_c), w0_d, w0_c,
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LENGTH_OF(w1_c), w1_d, w1_c, LENGTH_OF(w2_c), w2_d, w2_c);
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const unsigned int r_len = (w_len + 1) / 2;
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void *r0 = tail_alloc(r_len);
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const struct iovec r0_iov_[] = {
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{
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.iov_base = r0,
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.iov_len = r_len
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}
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};
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const struct iovec *r_iov = tail_memdup(r0_iov_, sizeof(r0_iov_));
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rc = pr(0, r_iov, ARRAY_SIZE(r0_iov_), 0);
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if (rc != (int) r_len)
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perror_msg_and_fail("preadv2: expected %u, returned %ld",
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r_len, rc);
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tprintf("preadv2(0, [{iov_base=\"%s\", iov_len=%u}], %u, 0, 0) = %u\n"
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" * %u bytes in buffer 0\n"
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" | 00000 %-49s %-16s |\n",
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r0_c, r_len, (unsigned int) ARRAY_SIZE(r0_iov_),
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r_len, r_len, r0_d, r0_c);
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void *r1 = tail_alloc(r_len);
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void *r2 = tail_alloc(w_len);
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const struct iovec r1_iov_[] = {
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{
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.iov_base = r1,
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.iov_len = r_len
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},
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{
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.iov_base = r2,
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.iov_len = w_len
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}
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};
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r_iov = tail_memdup(r1_iov_, sizeof(r1_iov_));
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rc = pr(0, r_iov, ARRAY_SIZE(r1_iov_), r_len);
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if (rc != (int) w_len - (int) r_len)
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perror_msg_and_fail("preadv2: expected %d, returned %ld",
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(int) w_len - r_len, rc);
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tprintf("preadv2(0, [{iov_base=\"%s\", iov_len=%u}"
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", {iov_base=\"\", iov_len=%u}], %u, %u, 0) = %u\n"
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" * %u bytes in buffer 0\n"
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" | 00000 %-49s %-16s |\n",
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r1_c, r_len, w_len, (unsigned int) ARRAY_SIZE(r1_iov_),
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r_len, w_len - r_len,
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w_len - r_len, r1_d, r1_c);
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close(0);
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}
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int
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main(void)
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{
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const kernel_ulong_t vlen = (kernel_ulong_t) 0xfac1fed2dad3bef4ULL;
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const unsigned long long pos = 0x7ac5fed6dad7bef8;
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const kernel_ulong_t pos_l = (kernel_ulong_t) pos;
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long rc;
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int test_dumpio;
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tprintf("%s", "");
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#if defined __x86_64__ && defined __ILP32__
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/*
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* x32 is the only architecture where preadv2 takes 5 arguments,
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* see preadv64v2 in kernel sources.
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*/
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rc = syscall(__NR_preadv2, -1, NULL, vlen, pos_l, 1);
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#else
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const kernel_ulong_t pos_h =
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(sizeof(pos_l) == sizeof(pos)) ?
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(kernel_ulong_t) 0xbadc0deddeadbeefULL :
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(kernel_ulong_t) (pos >> 32);
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rc = syscall(__NR_preadv2, -1, NULL, vlen, pos_l, pos_h, 1);
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#endif
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if (rc != -1 || (ENOSYS != errno && EBADF != errno))
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perror_msg_and_fail("preadv2");
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test_dumpio = EBADF == errno;
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tprintf("preadv2(-1, NULL, %lu, %lld, RWF_HIPRI) = %s\n",
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(unsigned long) vlen, pos, sprintrc(rc));
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#if defined __x86_64__ && defined __ILP32__
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/*
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* x32 is the only architecture where pwritev2 takes 5 arguments,
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* see pwritev64v2 in kernel sources.
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*/
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rc = syscall(__NR_pwritev2, -1, NULL, vlen, pos_l, 1);
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#else
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rc = syscall(__NR_pwritev2, -1, NULL, vlen, pos_l, pos_h, 1);
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#endif
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if (rc != -1 || (ENOSYS != errno && EBADF != errno))
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perror_msg_and_fail("pwritev2");
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tprintf("pwritev2(-1, NULL, %lu, %lld, RWF_HIPRI) = %s\n",
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(unsigned long) vlen, pos, sprintrc(rc));
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if (test_dumpio)
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dumpio();
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tprintf("%s\n", "+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_preadv2 && __NR_pwritev2")
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#endif
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