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/*
* Check decoding of set_mempolicy syscall.
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#define MAX_STRLEN 3
#define NLONGS(n) ((n + 8 * sizeof(long) - 2) \
/ (8 * sizeof(long)))
static const char *errstr;
static long
k_set_mempolicy(const unsigned int mode,
const void *const nmask,
const unsigned long maxnode)
{
const kernel_ulong_t fill = (kernel_ulong_t) 0xdefaced00000000ULL;
const kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL;
const kernel_ulong_t arg1 = fill | mode;
const kernel_ulong_t arg2 = (unsigned long) nmask;
const kernel_ulong_t arg3 = maxnode;
const long rc = syscall(__NR_set_mempolicy,
arg1, arg2, arg3, bad, bad, bad);
errstr = sprintrc(rc);
return rc;
}
#if XLAT_RAW
# define out_str raw
#elif XLAT_VERBOSE
# define out_str verbose
#else
# define out_str abbrev
#endif
static struct {
unsigned int val;
const char *raw;
const char *verbose;
const char *abbrev;
} mpol_modes[] = {
{ ARG_STR(0),
"0 /* MPOL_DEFAULT */",
"MPOL_DEFAULT" },
{ ARG_STR(0x1),
"0x1 /* MPOL_PREFERRED */",
"MPOL_PREFERRED" },
{ ARG_STR(0x2),
"0x2 /* MPOL_BIND */",
"MPOL_BIND" },
{ ARG_STR(0x3),
"0x3 /* MPOL_INTERLEAVE */",
"MPOL_INTERLEAVE" },
{ ARG_STR(0x4),
"0x4 /* MPOL_LOCAL */",
"MPOL_LOCAL" },
{ ARG_STR(0x5),
"0x5 /* MPOL_PREFERRED_MANY */",
"MPOL_PREFERRED_MANY" },
{ ARG_STR(0x8000),
"0x8000 /* MPOL_DEFAULT|MPOL_F_STATIC_NODES */",
"MPOL_DEFAULT|MPOL_F_STATIC_NODES" },
{ ARG_STR(0x4001),
"0x4001 /* MPOL_PREFERRED|MPOL_F_RELATIVE_NODES */",
"MPOL_PREFERRED|MPOL_F_RELATIVE_NODES" },
{ ARG_STR(0x2002),
"0x2002 /* MPOL_BIND|MPOL_F_NUMA_BALANCING */",
"MPOL_BIND|MPOL_F_NUMA_BALANCING" },
{ ARG_STR(0xe003),
"0xe003 /* MPOL_INTERLEAVE|MPOL_F_STATIC_NODES|MPOL_F_RELATIVE_NODES"
"|MPOL_F_NUMA_BALANCING */",
"MPOL_INTERLEAVE|MPOL_F_STATIC_NODES|MPOL_F_RELATIVE_NODES"
"|MPOL_F_NUMA_BALANCING" },
{ ARG_STR(0x6),
"0x6 /* MPOL_??? */",
"0x6 /* MPOL_??? */" },
{ ARG_STR(0xffff1fff),
"0xffff1fff /* MPOL_??? */",
"0xffff1fff /* MPOL_??? */" },
{ ARG_STR(0xffffffff),
"0xffffffff /* MPOL_F_STATIC_NODES|MPOL_F_RELATIVE_NODES"
"|MPOL_F_NUMA_BALANCING|0xffff1fff */",
"MPOL_F_STATIC_NODES|MPOL_F_RELATIVE_NODES|MPOL_F_NUMA_BALANCING|0xffff1fff" }
};
static void
print_nodes(const unsigned long maxnode, unsigned int offset)
{
unsigned int nlongs = NLONGS(maxnode);
if (nlongs <= offset)
nlongs = 0;
else
nlongs -= offset;
const unsigned int size = nlongs * sizeof(long);
unsigned long *const nodemask =
tail_alloc(size ? size : (offset ? 1 : 0));
memset(nodemask, 0, size);
k_set_mempolicy(mpol_modes[0].val, nodemask, maxnode);
printf("set_mempolicy(%s, ", mpol_modes[0].out_str);
if (nlongs) {
putc('[', stdout);
for (unsigned int i = 0; i < nlongs + offset; ++i) {
if (i)
fputs(", ", stdout);
if (i < nlongs) {
if (i >= MAX_STRLEN) {
fputs("...", stdout);
break;
}
printf("%#0*lx", (int) sizeof(long) * 2 + 2,
nodemask[i]);
} else {
printf("... /* %p */", nodemask + i);
break;
}
}
putc(']', stdout);
} else {
if (maxnode)
printf("%p", nodemask);
else
printf("[]");
}
printf(", %lu) = %s\n", maxnode, errstr);
}
static void
test_offset(const unsigned int offset)
{
unsigned long maxnode = get_page_size() * 8;
print_nodes(maxnode, offset);
print_nodes(maxnode + 1, offset);
print_nodes(maxnode + 2, offset);
maxnode = sizeof(long) * 8;
print_nodes(0, offset);
print_nodes(1, offset);
print_nodes(2, offset);
print_nodes(maxnode - 1, offset);
print_nodes(maxnode , offset);
print_nodes(maxnode + 1, offset);
print_nodes(maxnode + 2, offset);
print_nodes(maxnode * 2 - 1, offset);
print_nodes(maxnode * 2 , offset);
print_nodes(maxnode * 2 + 1, offset);
print_nodes(maxnode * 2 + 2, offset);
print_nodes(maxnode * 3 - 1, offset);
print_nodes(maxnode * 3 , offset);
print_nodes(maxnode * 3 + 1, offset);
print_nodes(maxnode * 3 + 2, offset);
print_nodes(maxnode * 4 + 2, offset);
}
int
main(void)
{
if (k_set_mempolicy(mpol_modes[0].val, 0, 0))
perror_msg_and_skip("set_mempolicy");
printf("set_mempolicy(%s, NULL, 0) = 0\n", mpol_modes[0].out_str);
const unsigned long *nodemask = (void *) 0xfacefeedfffffffeULL;
const unsigned long maxnode = (unsigned long) 0xcafef00ddeadbeefULL;
for (unsigned int i = 0; i < ARRAY_SIZE(mpol_modes); ++i) {
if (i) {
k_set_mempolicy(mpol_modes[i].val, 0, 0);
printf("set_mempolicy(%s, NULL, 0) = %s\n",
mpol_modes[i].out_str, errstr);
}
k_set_mempolicy(mpol_modes[i].val, nodemask, maxnode);
printf("set_mempolicy(%s, %p, %lu) = %s\n",
mpol_modes[i].out_str, nodemask, maxnode, errstr);
}
test_offset(0);
test_offset(1);
puts("+++ exited with 0 +++");
return 0;
}
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