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/*
* Check decoding of get_mempolicy syscall.
*
* Copyright (c) 2016-2022 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <stdio.h>
#include <unistd.h>
#include "xlat.h"
#include "xlat/mpol_modes.h"
#define MAX_STRLEN 3
#define NLONGS(n) ((n + 8 * sizeof(long) - 2) \
/ (8 * sizeof(long)))
static void
print_nodes(unsigned long maxnode)
{
unsigned long *const nodemask =
tail_alloc(sizeof(*nodemask) * NLONGS(maxnode));
if (syscall(__NR_get_mempolicy, 0, nodemask, maxnode, 0, 0)) {
printf("get_mempolicy(NULL, %p, %lu, NULL, 0) = -1 %s (%m)\n",
nodemask, maxnode, errno2name());
return;
}
printf("get_mempolicy(NULL, [");
unsigned int nlongs = NLONGS(maxnode);
for (unsigned int i = 0; i < nlongs; ++i) {
if (i)
fputs(", ", stdout);
if (i >= MAX_STRLEN) {
fputs("...", stdout);
break;
}
printf("%#0*lx", (int) sizeof(*nodemask) * 2, nodemask[i]);
}
printf("], %lu, NULL, 0) = 0\n", maxnode);
}
int
main(void)
{
long rc;
if (syscall(__NR_get_mempolicy, 0, 0, 0, 0, 0))
perror_msg_and_skip("get_mempolicy");
puts("get_mempolicy(NULL, NULL, 0, NULL, 0) = 0");
int *mode = (void *) 0xdefaced1baddeed2;
unsigned long maxnode = (unsigned long) 0xcafef00dbadc0dedULL;
const unsigned long *nodemask = (void *) 0xfacedad3bebefed4ULL;
const unsigned long addr = (unsigned long) 0xfacefeeddeadbeefULL;
const unsigned long flags = -1U;
rc = syscall(__NR_get_mempolicy, mode, nodemask, maxnode, addr, flags);
printf("get_mempolicy(%p, %p, %lu, %#lx, %s|%#lx) = %ld %s (%m)\n",
mode, nodemask, maxnode, addr,
"MPOL_F_NODE|MPOL_F_ADDR|MPOL_F_MEMS_ALLOWED",
flags & ~7, rc, errno2name());
mode = tail_alloc(sizeof(*mode));
rc = syscall(__NR_get_mempolicy, mode, 0, 0, 0, 0);
printf("get_mempolicy([");
printxval(mpol_modes, (unsigned) *mode, "MPOL_???");
printf("], NULL, 0, NULL, 0) = %ld\n", rc);
*mode = -1;
rc = syscall(__NR_get_mempolicy, mode, 0, 0, mode - 1, 2);
printf("get_mempolicy([");
printxval(mpol_modes, (unsigned) *mode, "MPOL_???");
printf("], NULL, 0, %p, MPOL_F_ADDR) = %ld\n", mode - 1, rc);
maxnode = get_page_size() * 8;
print_nodes(maxnode);
print_nodes(maxnode + 1);
print_nodes(maxnode + 2);
maxnode = sizeof(*nodemask) * 8;
print_nodes(maxnode - 1);
print_nodes(maxnode );
print_nodes(maxnode + 1);
print_nodes(maxnode + 2);
print_nodes(maxnode * 2 - 1);
print_nodes(maxnode * 2 );
print_nodes(maxnode * 2 + 1);
print_nodes(maxnode * 2 + 2);
print_nodes(maxnode * 3 - 1);
print_nodes(maxnode * 3 );
print_nodes(maxnode * 3 + 1);
print_nodes(maxnode * 3 + 2);
puts("+++ exited with 0 +++");
return 0;
}
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