| 1 | // RUN: %clangxx_asan -std=c++11 -O0 %s -o %t |
|---|
| 2 | // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=READ |
|---|
| 3 | // RUN: not %run %t write 2>&1 | FileCheck %s --check-prefix=WRITE |
|---|
| 4 | // REQUIRES: x86-target-arch |
|---|
| 5 | |
|---|
| 6 | #include <sys/mman.h> |
|---|
| 7 | |
|---|
| 8 | static volatile int sink; |
|---|
| 9 | __attribute__((noinline)) void Read(int *ptr) { sink = *ptr; } |
|---|
| 10 | __attribute__((noinline)) void Write(int *ptr) { *ptr = 0; } |
|---|
| 11 | int main(int argc, char **argv) { |
|---|
| 12 | void *volatile p = |
|---|
| 13 | mmap(addr: nullptr, len: 4096, PROT_READ, MAP_PRIVATE | MAP_ANON, fd: -1, offset: 0); |
|---|
| 14 | munmap(addr: p, len: 4096); |
|---|
| 15 | if (argc == 1) |
|---|
| 16 | Read(ptr: (int *)p); |
|---|
| 17 | else |
|---|
| 18 | Write(ptr: (int *)p); |
|---|
| 19 | } |
|---|
| 20 | // READ: AddressSanitizer: SEGV on unknown address |
|---|
| 21 | // READ: The signal is caused by a READ memory access. |
|---|
| 22 | // WRITE: AddressSanitizer: SEGV on unknown address |
|---|
| 23 | // WRITE: The signal is caused by a WRITE memory access. |
|---|
| 24 | |
|---|
