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/* COVERAGE: futex */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <linux/futex.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/mman.h>
static int *futex_addr;
static inline int
__futex(int *uaddr, int op, int val, const struct timespec *timeout,
int *uaddr2, int val3)
{
return syscall(SYS_futex, uaddr, op, val, timeout, uaddr2, val3);
}
void do_child()
{
*futex_addr = 0;
__futex(futex_addr, FUTEX_WAIT, 0, NULL, NULL, 0);
}
int main()
{
pid_t pid;
int status;
struct timespec t = {0,789};
// Create a mmapped area that both the parent and child processes
// can access.
futex_addr = mmap(NULL, sizeof(int), PROT_READ|PROT_WRITE,
MAP_SHARED|MAP_ANONYMOUS, -1, 0);
pid = fork();
if (pid == 0) { /* child */
do_child();
exit(0);
}
// Wait for the child to run and wait on the futex.
sleep(1);
// Wake the child (which should immediately exit).
__futex(futex_addr, FUTEX_WAKE, 1, NULL, NULL, 0);
//staptest// futex (XXXX, FUTEX_WAKE, 1) = 1
// Clean up the child process and the mmapped area.
waitpid(pid, &status, 0);
munmap(futex_addr, sizeof(int));
/* Limit testing. */
__futex((int *)-1, FUTEX_WAKE, 1, NULL, NULL, 0);
#ifdef __s390__
//staptest// futex (0x[7]?[f]+, FUTEX_WAKE, 1) = NNNN
#else
//staptest// futex (0x[f]+, FUTEX_WAKE, 1) = NNNN
#endif
__futex(NULL, -1, 1, NULL, NULL, 0);
#ifdef __s390__
//staptest// futex (0x0, 0x[7]?[f]+, 1) = NNNN
#else
//staptest// futex (0x0, 0x[f]+, 1) = NNNN
#endif
__futex(NULL, FUTEX_CMP_REQUEUE, -1, NULL, NULL, 0);
//staptest// futex (0x0, FUTEX_CMP_REQUEUE, -1, 0, 0x0, 0) = NNNN
__futex(NULL, FUTEX_CMP_REQUEUE, 1, (struct timespec *)-1, NULL, 0);
#if __WORDSIZE == 64
//staptest// futex (0x0, FUTEX_CMP_REQUEUE, 1, 18446744073709551615, 0x0, 0) = NNNN
#else
#ifdef __s390__
//staptest// futex (0x0, FUTEX_CMP_REQUEUE, 1, [[[[2147483647!!!!4294967295]]]], 0x0, 0) = NNNN
#else
//staptest// futex (0x0, FUTEX_CMP_REQUEUE, 1, 4294967295, 0x0, 0) = NNNN
#endif
#endif
__futex(NULL, FUTEX_CMP_REQUEUE, 1, NULL, (int *)-1, 0);
#ifdef __s390__
//staptest// futex (0x0, FUTEX_CMP_REQUEUE, 1, 0, 0x[7]?[f]+, 0) = NNNN
#else
//staptest// futex (0x0, FUTEX_CMP_REQUEUE, 1, 0, 0x[f]+, 0) = NNNN
#endif
__futex(NULL, FUTEX_CMP_REQUEUE, 1, NULL, NULL, -1);
//staptest// futex (0x0, FUTEX_CMP_REQUEUE, 1, 0, 0x0, -1) = NNNN
/* Since the futex argstr is different based on the operation,
* test several variants. */
#ifdef FUTEX_WAKE_BITSET
__futex(NULL, FUTEX_WAKE_BITSET, 1, NULL, NULL, -1);
#ifdef __s390__
//staptest// futex (0x0, FUTEX_WAKE_BITSET, 1, 0x[7]?[f]+) = NNNN
#else
//staptest// futex (0x0, FUTEX_WAKE_BITSET, 1, 0x[f]+) = NNNN
#endif
#endif
__futex(NULL, FUTEX_WAIT, 1, &t, NULL, 0);
//staptest// futex (0x0, FUTEX_WAIT, 1, \[0.000000789\]) = NNNN
#ifdef FUTEX_WAIT_BITSET
__futex(NULL, FUTEX_WAIT_BITSET, 1, &t, NULL, 0xbeef);
//staptest// futex (0x0, FUTEX_WAIT_BITSET, 1, \[0.000000789\], 0xbeef) = NNNN
#endif
__futex(NULL, FUTEX_REQUEUE, 1, (struct timespec *)2, NULL, -1);
//staptest// futex (0x0, FUTEX_REQUEUE, 1, 2, 0x0) = NNNN
__futex(NULL, FUTEX_CMP_REQUEUE, 1, (struct timespec *)2, (int *)3, -1);
//staptest// futex (0x0, FUTEX_CMP_REQUEUE, 1, 2, 0x3, -1) = NNNN
__futex(NULL, FUTEX_WAKE_OP, 1, (struct timespec *)2, (int *)3,
FUTEX_OP(FUTEX_OP_SET, 2, FUTEX_OP_CMP_EQ, 1));
//staptest// futex (0x0, FUTEX_WAKE_OP, 1, 2, 0x3, {FUTEX_OP_SET, 2, FUTEX_OP_CMP_EQ, 1}) = NNNN
#ifdef FUTEX_WAIT_REQUEUE_PI
__futex(NULL, FUTEX_WAIT_REQUEUE_PI, 1, &t, NULL, 0);
//staptest// futex (0x0, FUTEX_WAIT_REQUEUE_PI, 1, \[0.000000789\], 0x0) = NNNN
#endif
return 0;
}
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