| 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 | |
| 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(format: "Child: %p\n", x); |
| 19 | _exit(status: 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 __attribute__((aligned(16))) child_stack[kStackSize + 1]; |
| 25 | char *sp = child_stack + kStackSize; // Stack grows down. |
| 26 | printf(format: "Parent: %p\n", sp); |
| 27 | pid_t clone_pid = clone(fn: Child, child_stack: sp, CLONE_FILES | CLONE_VM, NULL); |
| 28 | int status; |
| 29 | pid_t wait_result = waitpid(pid: clone_pid, stat_loc: &status, __WCLONE); |
| 30 | if (wait_result < 0) { |
| 31 | perror(s: "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(format: "PASSED\n"); |
| 40 | // CHECK: PASSED |
| 41 | return ret; |
| 42 | } |
| 43 | return 0; |
| 44 | } |
| 45 |