| // 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 |
| // UNSUPPORTED: powerpc64,mips,s390 |
| |
| #include <sys/mman.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 = |
| mmap(nullptr, 4096, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); |
| munmap(p, 4096); |
| if (argc == 1) |
| Read((int *)p); |
| else |
| Write((int *)p); |
| } |
| // READ: AddressSanitizer: SEGV on unknown address |
| // READ: The signal is caused by a READ memory access. |
| // WRITE: AddressSanitizer: SEGV on unknown address |
| // WRITE: The signal is caused by a WRITE memory access. |
