/* Procedure executed by sideline threads.
* XXX i#500: Cannot use libc routines (printf) in the child process.
*/
int run(void *arg)
{
int threadnum = (int)(long) arg;
int i = 0;
/* for CLONE_CHILD_CLEARTID for signaling parent. if we used raw
* clone system call we could get kernel to do this for us.
*/
child[threadnum] = dynamorio_syscall(SYS_gettid, 0);
dynamorio_syscall(SYS_set_tid_address, 1, &child[threadnum]);
child_started[threadnum] = true;
nolibc_print("Sideline thread started\n");
while (true) {
/* do nothing for now */
i++;
if (i % 25000000 == 0)
break;
}
while (!child_exit[threadnum])
nolibc_nanosleep(&sleeptime);
nolibc_print("Sideline thread finished, exiting whole group\n");
/* We deliberately bring down the whole group. Note that this is
* the default on x64 on returning for some reason which seems
* like a bug in _clone() (xref i#94).
*/
dynamorio_syscall(SYS_exit_group, 0);
return 0;
}
/* Procedure executed by sideline threads
* XXX i#500: Cannot use libc routines (printf) in the child process.
*/
int run(void *arg)
{
int i = 0;
nolibc_print("Sideline thread started\n");
while (true) {
/* do nothing for now */
i++;
if (i % 2500000 == 0) {
nolibc_print("i = ");
nolibc_print_int(i);
nolibc_print("\n");
}
if (i % 25000000 == 0)
break;
}
while (!child_exit)
nolibc_nanosleep(&sleeptime);
nolibc_print("Sideline thread finished\n");
child_done = true;
return 0;
}
/* Procedure executed by sideline threads
* XXX i#500: Cannot use libc routines (printf) in the child process.
*/
int run(void *arg)
{
int threadnum = (int)(long) arg;
int i = 0;
/* for CLONE_CHILD_CLEARTID for signaling parent. if we used raw
* clone system call we could get kernel to do this for us.
*/
child[threadnum] = nolibc_syscall(SYS_gettid, 0);
nolibc_syscall(SYS_set_tid_address, 1, &child[threadnum]);
if (threadnum == 0) {
/* first child creates rest of group */
int j;
for (j = 1; j < NUM_THREADS; j++) {
child[j] = create_thread(run, (void *)(long)j, &stack[j], true);
if (child[j] < 0)
nolibc_print("failed to create child thread\n");
}
}
child_started[threadnum] = true;
nolibc_print("Sideline thread started\n");
while (true) {
/* do nothing for now */
i++;
if (i % 25000000 == 0)
break;
}
while (!child_exit[threadnum])
nolibc_nanosleep(&sleeptime);
nolibc_print("Sideline thread finished, exiting whole group\n");
child_done[threadnum] = true;
/* We deliberately bring down the whole group. Note that this is
* the default on x64 on returning for some reason which seems
* like a bug in _clone() (xref i#94).
*/
nolibc_syscall(SYS_exit_group, 0);
return 0;
}
