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
Child(void * arg)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
main(int argc,char ** argv)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