| 1 | // Check that ASan correctly detects SEGV on the zero page. |
|---|---|
| 2 | // RUN: %clangxx_asan %s -o %t && not %run %t 2>&1 | FileCheck %s |
| 3 | |
| 4 | // Handled as a codesigning violation and exits with SIGKILL not SEGV |
| 5 | // UNSUPPORTED: ios |
| 6 | |
| 7 | |
| 8 | #if defined(_MSC_VER) && !defined(__CLANG__) |
| 9 | # define __has_feature(x) 0 |
| 10 | #endif |
| 11 | |
| 12 | #if __has_feature(ptrauth_calls) |
| 13 | # include <ptrauth.h> |
| 14 | #endif |
| 15 | |
| 16 | typedef void void_f(); |
| 17 | int main() { |
| 18 | void_f *func = (void_f *)0x4; |
| 19 | #if __has_feature(ptrauth_calls) |
| 20 | func = ptrauth_sign_unauthenticated( |
| 21 | func, ptrauth_key_function_pointer, 0); |
| 22 | #endif |
| 23 | func(); |
| 24 | // x86 reports the SEGV with both address=4 and pc=4. |
| 25 | // On PowerPC64 ELFv1, the pointer is taken to be a function-descriptor |
| 26 | // pointer out of which three 64-bit quantities are read. This will SEGV, but |
| 27 | // the compiler is free to choose the order. As a result, the address is |
| 28 | // either 0x4, 0xc or 0x14. The pc is still in main() because it has not |
| 29 | // actually made the call when the faulting access occurs. |
| 30 | // CHECK: {{AddressSanitizer: (SEGV|access-violation).*(address|pc) 0x0*[45c]}} |
| 31 | return 0; |
| 32 | } |
| 33 |