1 // Regression test for: 2 // http://code.google.com/p/address-sanitizer/issues/detail?id=37 3 4 // RUN: %clangxx_asan -m64 -O0 %s -o %t && %t | FileCheck %s 5 // RUN: %clangxx_asan -m64 -O1 %s -o %t && %t | FileCheck %s 6 // RUN: %clangxx_asan -m64 -O2 %s -o %t && %t | FileCheck %s 7 // RUN: %clangxx_asan -m64 -O3 %s -o %t && %t | FileCheck %s 8 // RUN: %clangxx_asan -m32 -O0 %s -o %t && %t | FileCheck %s 9 // RUN: %clangxx_asan -m32 -O1 %s -o %t && %t | FileCheck %s 10 // RUN: %clangxx_asan -m32 -O2 %s -o %t && %t | FileCheck %s 11 // RUN: %clangxx_asan -m32 -O3 %s -o %t && %t | FileCheck %s 12 13 #include <stdio.h> 14 #include <sched.h> 15 #include <sys/syscall.h> 16 #include <sys/types.h> 17 #include <sys/wait.h> 18 #include <unistd.h> 19 20 int Child(void *arg) { 21 char x[32] = {0}; // Stack gets poisoned. 22 printf("Child: %p\n", x); 23 _exit(1); // NoReturn, stack will remain unpoisoned unless we do something. 24 } 25 26 int main(int argc, char **argv) { 27 const int kStackSize = 1 << 20; 28 char child_stack[kStackSize + 1]; 29 char *sp = child_stack + kStackSize; // Stack grows down. 30 printf("Parent: %p\n", sp); 31 pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL, 0, 0, 0); 32 int status; 33 pid_t wait_result = waitpid(clone_pid, &status, __WCLONE); 34 if (wait_result < 0) { 35 perror("waitpid"); 36 return 0; 37 } 38 if (wait_result == clone_pid && WIFEXITED(status)) { 39 // Make sure the child stack was indeed unpoisoned. 40 for (int i = 0; i < kStackSize; i++) 41 child_stack[i] = i; 42 int ret = child_stack[argc - 1]; 43 printf("PASSED\n"); 44 // CHECK: PASSED 45 return ret; 46 } 47 return 0; 48 } 49
