1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <gtest/gtest.h> 18 19 #include <sys/mman.h> 20 #include <sys/prctl.h> 21 #include <unistd.h> 22 #include "private/bionic_prctl.h" 23 24 // http://b/20017123. 25 TEST(sys_prctl, bug_20017123) { 26 #if defined(__ANDROID__) 27 size_t page_size = static_cast<size_t>(sysconf(_SC_PAGESIZE)); 28 void* p = mmap(NULL, page_size * 3, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); 29 ASSERT_NE(MAP_FAILED, p); 30 ASSERT_EQ(0, mprotect(p, page_size, PROT_NONE)); 31 ASSERT_NE(-1, prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, p, page_size * 3, "anonymous map space")); 32 volatile char* vp = reinterpret_cast<volatile char*>(p); 33 // Below memory access causes SEGV if the memory map is screwed up. 34 *(vp + page_size) = 0; 35 ASSERT_EQ(0, munmap(p, page_size * 3)); 36 #else 37 GTEST_LOG_(INFO) << "This test does nothing as it tests an Android specific kernel feature."; 38 #endif 39 } 40
