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