116 lines
2.8 KiB
C
116 lines
2.8 KiB
C
/*
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* Check decoding of get_mempolicy syscall.
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*
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* Copyright (c) 2016-2018 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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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_get_mempolicy
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# include <stdio.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(unsigned long maxnode)
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{
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unsigned long *const nodemask =
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tail_alloc(sizeof(*nodemask) * NLONGS(maxnode));
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if (syscall(__NR_get_mempolicy, 0, nodemask, maxnode, 0, 0)) {
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printf("get_mempolicy(NULL, %p, %lu, NULL, 0) = -1 %s (%m)\n",
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nodemask, maxnode, errno2name());
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return;
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}
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printf("get_mempolicy(NULL, [");
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unsigned int nlongs = NLONGS(maxnode);
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unsigned int i;
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for (i = 0; i < nlongs; ++i) {
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if (i)
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fputs(", ", stdout);
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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(*nodemask) * 2 + 2, nodemask[i]);
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}
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printf("], %lu, NULL, 0) = 0\n", maxnode);
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}
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int
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main(void)
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{
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long rc;
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if (syscall(__NR_get_mempolicy, 0, 0, 0, 0, 0))
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perror_msg_and_skip("get_mempolicy");
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puts("get_mempolicy(NULL, NULL, 0, NULL, 0) = 0");
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int *mode = (void *) 0xdefaced1baddeed2;
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unsigned long maxnode = (unsigned long) 0xcafef00dbadc0dedULL;
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const unsigned long *nodemask = (void *) 0xfacedad3bebefed4ULL;
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const unsigned long addr = (unsigned long) 0xfacefeeddeadbeefULL;
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const unsigned long flags = -1U;
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rc = syscall(__NR_get_mempolicy, mode, nodemask, maxnode, addr, flags);
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printf("get_mempolicy(%p, %p, %lu, %#lx, %s|%#lx) = %ld %s (%m)\n",
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mode, nodemask, maxnode, addr,
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"MPOL_F_NODE|MPOL_F_ADDR",
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flags & ~3, rc, errno2name());
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mode = tail_alloc(sizeof(*mode));
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rc = syscall(__NR_get_mempolicy, mode, 0, 0, 0, 0);
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printf("get_mempolicy([");
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printxval(policies, (unsigned) *mode, "MPOL_???");
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printf("], NULL, 0, NULL, 0) = %ld\n", rc);
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*mode = -1;
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rc = syscall(__NR_get_mempolicy, mode, 0, 0, mode - 1, 2);
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printf("get_mempolicy([");
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printxval(policies, (unsigned) *mode, "MPOL_???");
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printf("], NULL, 0, %p, MPOL_F_ADDR) = %ld\n", mode - 1, rc);
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maxnode = get_page_size() * 8;
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print_nodes(maxnode);
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print_nodes(maxnode + 1);
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print_nodes(maxnode + 2);
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maxnode = sizeof(*nodemask) * 8;
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print_nodes(maxnode - 1);
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print_nodes(maxnode );
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print_nodes(maxnode + 1);
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print_nodes(maxnode + 2);
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print_nodes(maxnode * 2 - 1);
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print_nodes(maxnode * 2 );
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print_nodes(maxnode * 2 + 1);
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print_nodes(maxnode * 2 + 2);
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print_nodes(maxnode * 3 - 1);
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print_nodes(maxnode * 3 );
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print_nodes(maxnode * 3 + 1);
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print_nodes(maxnode * 3 + 2);
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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_get_mempolicy")
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#endif
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