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/*
* Check decoding of futex_wake syscall.
*
* Copyright (c) 2024 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "futex2_flags.h"
#include "scno.h"
#include "xmalloc.h"
#include <stdio.h>
#include <unistd.h>
static const char *errstr;
static long
k_futex_wake(const void *const uaddr,
const unsigned long mask,
const unsigned int nr,
const unsigned int flags)
{
const kernel_ulong_t fill = (kernel_ulong_t) 0xdefaced00000000ULL;
const kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL;
const kernel_ulong_t arg1 = (uintptr_t) uaddr;
const kernel_ulong_t arg2 = mask;
const kernel_ulong_t arg3 = fill | nr;
const kernel_ulong_t arg4 = fill | flags;
const long rc = syscall(__NR_futex_wake, arg1, arg2, arg3, arg4, bad, bad);
errstr = sprintrc(rc);
return rc;
}
static const struct {
unsigned long val;
const char *raw;
const char *abbrev;
const char *verbose;
} masks[] = { {
ARG_STR(0),
"0",
"0"
}, {
ARG_STR(0xffffffff),
"FUTEX_BITSET_MATCH_ANY",
"0xffffffff /* FUTEX_BITSET_MATCH_ANY */"
}, {
#if SIZEOF_LONG == 4
ARG_STR(0xfffffff1),
"0xfffffff1",
"0xfffffff1"
#else
0xfffffff1fffffff2UL,
"0xfffffff1fffffff2",
"0xfffffff1fffffff2",
"0xfffffff1fffffff2"
#endif
},
};
int
main(void)
{
TAIL_ALLOC_OBJECT_CONST_PTR(uint32_t, uaddr);
const int nr = 0xfacefeed;
struct {
void *val;
const char *str;
} addrs[] = {
{ ARG_STR(NULL) },
{ uaddr, xasprintf("%p", uaddr) },
};
for (size_t a = 0; a < ARRAY_SIZE(addrs); ++a) {
for (size_t m = 0; m < ARRAY_SIZE(masks); ++m) {
for (size_t f = 0; f < ARRAY_SIZE(futex2_flags); ++f) {
k_futex_wake(addrs[a].val,
masks[m].val,
nr,
futex2_flags[f].val);
printf("futex_wake(%s, %s, %d, %s) = %s\n",
addrs[a].str,
masks[m].XLAT_name,
nr,
futex2_flags[f].XLAT_name,
errstr);
}
}
}
puts("+++ exited with 0 +++");
return 0;
}
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