| /* Regression test for: |
| http://code.google.com/p/address-sanitizer/issues/detail?id=37 */ |
| |
| /* { dg-do run { target { *-*-linux* x86_64-*-freebsd* } } } */ |
| /* { dg-require-effective-target clone } */ |
| /* { dg-require-effective-target hw } */ |
| /* { dg-options "-D_GNU_SOURCE" } */ |
| |
| #include <stdio.h> |
| #include <stdlib.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. */ |
| } |
| |
| volatile int zero = 0; |
| |
| int main(int argc, char **argv) { |
| int i; |
| const int kStackSize = 1 << 20; |
| char __attribute__((aligned(16))) 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); |
| if (clone_pid == -1) { |
| perror("clone"); |
| return 1; |
| } |
| int status; |
| pid_t wait_result = waitpid(clone_pid, &status, __WCLONE); |
| if (wait_result < 0) { |
| perror("waitpid"); |
| return 1; |
| } |
| if (wait_result == clone_pid && WIFEXITED(status)) { |
| /* Make sure the child stack was indeed unpoisoned. */ |
| for (i = 0; i < kStackSize; i++) |
| child_stack[i] = i; |
| int ret = child_stack[zero]; |
| return ret; |
| } |
| return 1; |
| } |