1 // Regression test for: 2 // http://code.google.com/p/address-sanitizer/issues/detail?id=37 3 4 // RUN: %clangxx_asan -O0 %s -o %t && %run %t | FileCheck %s 5 // RUN: %clangxx_asan -O1 %s -o %t && %run %t | FileCheck %s 6 // RUN: %clangxx_asan -O2 %s -o %t && %run %t | FileCheck %s 7 // RUN: %clangxx_asan -O3 %s -o %t && %run %t | FileCheck %s 8 // XFAIL: arm-linux-gnueabi 9 10 #include <stdio.h> 11 #include <sched.h> 12 #include <sys/syscall.h> 13 #include <sys/types.h> 14 #include <sys/wait.h> 15 #include <unistd.h> 16 17 int Child(void *arg) { 18 char x[32] = {0}; // Stack gets poisoned. 19 printf("Child: %p\n", x); 20 _exit(1); // NoReturn, stack will remain unpoisoned unless we do something. 21 } 22 23 int main(int argc, char **argv) { 24 const int kStackSize = 1 << 20; 25 char __attribute__((aligned(16))) child_stack[kStackSize + 1]; 26 char *sp = child_stack + kStackSize; // Stack grows down. 27 printf("Parent: %p\n", sp); 28 pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL); 29 int status; 30 pid_t wait_result = waitpid(clone_pid, &status, __WCLONE); 31 if (wait_result < 0) { 32 perror("waitpid"); 33 return 0; 34 } 35 if (wait_result == clone_pid && WIFEXITED(status)) { 36 // Make sure the child stack was indeed unpoisoned. 37 for (int i = 0; i < kStackSize; i++) 38 child_stack[i] = i; 39 int ret = child_stack[argc - 1]; 40 printf("PASSED\n"); 41 // CHECK: PASSED 42 return ret; 43 } 44 return 0; 45 } 46
