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#ifdef __linux__
#include <stdio.h>
#include <sched.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
int Child(void *arg) {
char x[32] = {0}; // Stack gets poisoned.
printf("Child: %p\n", x);
_exit(1); // NoReturn, stack will remain unpoisoned unless we do something.
}
int main(int argc, char **argv) {
const int kStackSize = 1 << 20;
char child_stack[kStackSize + 1];
char *sp = child_stack + kStackSize; // Stack grows down.
printf("Parent: %p\n", sp);
pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL, 0, 0, 0);
waitpid(clone_pid, NULL, 0);
for (int i = 0; i < kStackSize; i++)
child_stack[i] = i;
int ret = child_stack[argc - 1];
printf("PASSED\n");
return ret;
}
#else // not __linux__
#include <stdio.h>
int main() {
printf("PASSED\n");
}
#endif
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