45 lines · cpp
1// Regression test for:2// http://code.google.com/p/address-sanitizer/issues/detail?id=373 4// RUN: %clangxx_asan -O0 %s -o %t && %run %t | FileCheck %s5// RUN: %clangxx_asan -O1 %s -o %t && %run %t | FileCheck %s6// RUN: %clangxx_asan -O2 %s -o %t && %run %t | FileCheck %s7// RUN: %clangxx_asan -O3 %s -o %t && %run %t | FileCheck %s8 9#include <stdio.h>10#include <sched.h>11#include <sys/syscall.h>12#include <sys/types.h>13#include <sys/wait.h>14#include <unistd.h>15 16int Child(void *arg) {17 char x[32] = {0}; // Stack gets poisoned.18 printf("Child: %p\n", x);19 _exit(1); // NoReturn, stack will remain unpoisoned unless we do something.20}21 22int main(int argc, char **argv) {23 const int kStackSize = 1 << 20;24 char __attribute__((aligned(16))) child_stack[kStackSize + 1];25 char *sp = child_stack + kStackSize; // Stack grows down.26 printf("Parent: %p\n", sp);27 pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL);28 int status;29 pid_t wait_result = waitpid(clone_pid, &status, __WCLONE);30 if (wait_result < 0) {31 perror("waitpid");32 return 0;33 }34 if (wait_result == clone_pid && WIFEXITED(status)) {35 // Make sure the child stack was indeed unpoisoned.36 for (int i = 0; i < kStackSize; i++)37 child_stack[i] = i;38 int ret = child_stack[argc - 1];39 printf("PASSED\n");40 // CHECK: PASSED41 return ret;42 }43 return 0;44}45