148 lines
4.2 KiB
C
148 lines
4.2 KiB
C
/*
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* Check decoding of set_mempolicy syscall.
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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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#ifdef __NR_set_mempolicy
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# include <errno.h>
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# include <stdio.h>
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# include <string.h>
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# include <unistd.h>
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# include "xlat.h"
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# include "xlat/policies.h"
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# define MAX_STRLEN 3
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# define NLONGS(n) ((n + 8 * sizeof(long) - 2) \
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/ (8 * sizeof(long)))
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static void
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print_nodes(const unsigned long maxnode, unsigned int offset)
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{
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unsigned int nlongs = NLONGS(maxnode);
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if (nlongs <= offset)
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nlongs = 0;
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else
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nlongs -= offset;
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const unsigned int size = nlongs * sizeof(long);
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unsigned long *const nodemask =
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tail_alloc(size ? size : (offset ? 1 : 0));
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memset(nodemask, 0, size);
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long rc = syscall(__NR_set_mempolicy, 0, nodemask, maxnode);
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const char *errstr = sprintrc(rc);
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fputs("set_mempolicy(MPOL_DEFAULT, ", stdout);
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if (nlongs) {
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putc('[', stdout);
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unsigned int i;
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for (i = 0; i < nlongs + offset; ++i) {
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if (i)
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fputs(", ", stdout);
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if (i < nlongs) {
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if (i >= MAX_STRLEN) {
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fputs("...", stdout);
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break;
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}
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printf("%#0*lx", (int) sizeof(long) * 2 + 2,
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nodemask[i]);
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} else {
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printf("... /* %p */", nodemask + i);
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break;
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}
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}
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putc(']', stdout);
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} else {
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if (maxnode)
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printf("%p", nodemask);
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else
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printf("[]");
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}
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printf(", %lu) = %s\n", maxnode, errstr);
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}
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static void
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test_offset(const unsigned int offset)
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{
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unsigned long maxnode = get_page_size() * 8;
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print_nodes(maxnode, offset);
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print_nodes(maxnode + 1, offset);
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print_nodes(maxnode + 2, offset);
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maxnode = sizeof(long) * 8;
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print_nodes(0, offset);
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print_nodes(1, offset);
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print_nodes(2, offset);
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print_nodes(maxnode - 1, offset);
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print_nodes(maxnode , offset);
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print_nodes(maxnode + 1, offset);
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print_nodes(maxnode + 2, offset);
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print_nodes(maxnode * 2 - 1, offset);
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print_nodes(maxnode * 2 , offset);
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print_nodes(maxnode * 2 + 1, offset);
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print_nodes(maxnode * 2 + 2, offset);
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print_nodes(maxnode * 3 - 1, offset);
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print_nodes(maxnode * 3 , offset);
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print_nodes(maxnode * 3 + 1, offset);
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print_nodes(maxnode * 3 + 2, offset);
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print_nodes(maxnode * 4 + 2, offset);
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}
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int
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main(void)
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{
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if (syscall(__NR_set_mempolicy, 0, 0, 0))
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perror_msg_and_skip("set_mempolicy");
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puts("set_mempolicy(MPOL_DEFAULT, NULL, 0) = 0");
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const unsigned long *nodemask = (void *) 0xfacefeedfffffffeULL;
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const unsigned long maxnode = (unsigned long) 0xcafef00dbadc0dedULL;
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long rc = syscall(__NR_set_mempolicy, 1, nodemask, maxnode);
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printf("set_mempolicy(MPOL_PREFERRED, %p, %lu) = %s\n",
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nodemask, maxnode, sprintrc(rc));
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test_offset(0);
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test_offset(1);
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puts("+++ 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_set_mempolicy")
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#endif
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