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/* Test exit of a child of a TCB_EXITING child where the toplevel process starts
* waiting on it. The middle one gets detached and strace must update the
* toplevel process'es number of attached children to 0.
*
* gcc -o test/childthread test/childthread.c -Wall -ggdb2 -pthread;./strace -f ./test/childthread
* It must print: write(1, "OK\n", ...
*/
#include <pthread.h>
#include <assert.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/wait.h>
static void *start0(void *arg)
{
pause();
/* NOTREACHED */
assert(0);
}
int main(int argc, char *argv[])
{
pthread_t thread0;
pid_t child, got_pid;
int status;
int i;
child = fork();
switch(child) {
case -1:
assert(0);
case 0:
i = pthread_create(&thread0, NULL, start0, NULL);
assert(i == 0);
/* The thread must be initialized, it becomes thread-child of this
process-child (child of a child of the toplevel process). */
sleep(1);
/* Here the child TCB cannot be deallocated as there still exist
* children (the thread child in START0). */
exit(42);
/* NOTREACHED */
assert(0);
default:
/* We must not be waiting in WAITPID when the child double-exits. */
sleep(2);
/* PID must be -1. */
got_pid = waitpid(-1, &status, 0);
assert(got_pid == child);
assert(WIFEXITED(status));
assert(WEXITSTATUS(status) == 42);
puts("OK");
exit(0);
}
/* NOTREACHED */
assert(0);
}
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