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 && %t | FileCheck %s 5 // RUN: %clangxx_asan -O1 %s -o %t && %t | FileCheck %s 6 // RUN: %clangxx_asan -O2 %s -o %t && %t | FileCheck %s 7 // RUN: %clangxx_asan -O3 %s -o %t && %t | FileCheck %s 8 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 16 int 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 22 int main(int argc, char **argv) { 23 const int kStackSize = 1 << 20; 24 char 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, 0, 0, 0); 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: PASSED 41 return ret; 42 } 43 return 0; 44 } 45
