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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// UNSUPPORTED: target={{(powerpc64|mips|s390).*}}5 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 // Writes to shadow are detected as reads from shadow gap (because of how the13 // shadow mapping works). This is kinda hard to fix. Test a random address in14 // the application part of the address space.15 void *volatile p =16 mmap(nullptr, 4096, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);17 munmap(p, 4096);18 if (argc == 1)19 Read((int *)p);20 else21 Write((int *)p);22}23// READ: AddressSanitizer: SEGV on unknown address24// READ: The signal is caused by a READ memory access.25// WRITE: AddressSanitizer: SEGV on unknown address26// WRITE: The signal is caused by a WRITE memory access.27