1 #ifdef __linux__ 2 #include <stdio.h> 3 #include <sched.h> 4 #include <sys/syscall.h> 5 #include <sys/types.h> 6 #include <sys/wait.h> 7 #include <unistd.h> 8 9 int Child(void *arg) { 10 char x[32] = {0}; // Stack gets poisoned. 11 printf("Child: %p\n", x); 12 _exit(1); // NoReturn, stack will remain unpoisoned unless we do something. 13 } 14 15 int main(int argc, char **argv) { 16 const int kStackSize = 1 << 20; 17 char child_stack[kStackSize + 1]; 18 char *sp = child_stack + kStackSize; // Stack grows down. 19 printf("Parent: %p\n", sp); 20 pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL, 0, 0, 0); 21 waitpid(clone_pid, NULL, 0); 22 for (int i = 0; i < kStackSize; i++) 23 child_stack[i] = i; 24 int ret = child_stack[argc - 1]; 25 printf("PASSED\n"); 26 return ret; 27 } 28 #else // not __linux__ 29 #include <stdio.h> 30 int main() { 31 printf("PASSED\n"); 32 // Check-Common: PASSED 33 } 34 #endif 35
