| // RUN: %clangxx_asan -std=c++11 -O0 %s -o %t |
| // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=READ |
| // RUN: not %run %t write 2>&1 | FileCheck %s --check-prefix=WRITE |
| |
| #include <windows.h> |
| #include <stdio.h> |
| |
| static volatile int sink; |
| __attribute__((noinline)) void Read(int *ptr) { sink = *ptr; } |
| __attribute__((noinline)) void Write(int *ptr) { *ptr = 0; } |
| int main(int argc, char **argv) { |
| // Writes to shadow are detected as reads from shadow gap (because of how the |
| // shadow mapping works). This is kinda hard to fix. Test a random address in |
| // the application part of the address space. |
| void *volatile p = VirtualAlloc(0, 4096, MEM_COMMIT, PAGE_READONLY); |
| bool ok = VirtualFree(p, 0, MEM_RELEASE); |
| if (!ok) { |
| printf("VirtualFree failed\n"); |
| return 0; |
| } |
| if (argc == 1) |
| Read((int *)p); |
| else |
| Write((int *)p); |
| } |
| // READ: AddressSanitizer: access-violation on unknown address |
| // READ: The signal is caused by a READ memory access. |
| // WRITE: AddressSanitizer: access-violation on unknown address |
| // WRITE: The signal is caused by a WRITE memory access. |