24 lines · c
1// RUN: %clangxx_asan -std=c++11 -O0 %s -o %t2// RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=READ3// RUN: not %run %t write 2>&1 | FileCheck %s --check-prefix=WRITE4// REQUIRES: x86-target-arch5 6#include <sys/mman.h>7 8static volatile int sink;9__attribute__((noinline)) void Read(int *ptr) { sink = *ptr; }10__attribute__((noinline)) void Write(int *ptr) { *ptr = 0; }11int main(int argc, char **argv) {12 void *volatile p =13 mmap(nullptr, 4096, PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0);14 munmap(p, 4096);15 if (argc == 1)16 Read((int *)p);17 else18 Write((int *)p);19}20// READ: AddressSanitizer: SEGV on unknown address21// READ: The signal is caused by a READ memory access.22// WRITE: AddressSanitizer: SEGV on unknown address23// WRITE: The signal is caused by a WRITE memory access.24