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#include <stdio.h>
#include <string.h>
#include <unistd.h>
#if defined(__linux__)
#include <sys/prctl.h>
#endif
int
main (int argc, char **argv)
{
#if defined(__linux__)
// Immediately enable any ptracer so that we can allow the stub attach
// operation to succeed. Some Linux kernels are locked down so that
// only an ancestor process can be a ptracer of a process. This disables that
// restriction. Without it, attach-related stub tests will fail.
#if defined(PR_SET_PTRACER) && defined(PR_SET_PTRACER_ANY)
// For now we execute on best effort basis. If this fails for
// some reason, so be it.
const int prctl_result = prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0);
(void) prctl_result;
#endif
#endif
int do_crash = 0;
int do_wait = 0;
int idx;
for (idx = 1; idx < argc; idx++)
{
if (strcmp(argv[idx], "CRASH") == 0)
do_crash = 1;
if (strcmp(argv[idx], "WAIT") == 0)
do_wait = 1;
}
printf("PID: %d END\n", getpid());
if (do_wait)
{
int keep_waiting = 1;
while (keep_waiting)
{
printf ("Waiting\n");
sleep(1); // Stop here to unset keep_waiting
}
}
if (do_crash)
{
char *touch_me_not = (char *) 0;
printf ("About to crash.\n");
touch_me_not[0] = 'a';
}
printf ("Got there on time and it did not crash.\n");
return 0;
}
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