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