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112 lines
3.3 KiB
112 lines
3.3 KiB
/*
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* Copyright (C) 2017 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 <stdint.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <vector>
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#include <gtest/gtest.h>
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#include "MemoryLocal.h"
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namespace unwindstack {
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TEST(MemoryLocalTest, read) {
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std::vector<uint8_t> src(1024);
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memset(src.data(), 0x4c, 1024);
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MemoryLocal local;
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std::vector<uint8_t> dst(1024);
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ASSERT_TRUE(local.ReadFully(reinterpret_cast<uint64_t>(src.data()), dst.data(), 1024));
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ASSERT_EQ(0, memcmp(src.data(), dst.data(), 1024));
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for (size_t i = 0; i < 1024; i++) {
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ASSERT_EQ(0x4cU, dst[i]);
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}
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memset(src.data(), 0x23, 512);
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ASSERT_TRUE(local.ReadFully(reinterpret_cast<uint64_t>(src.data()), dst.data(), 1024));
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ASSERT_EQ(0, memcmp(src.data(), dst.data(), 1024));
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for (size_t i = 0; i < 512; i++) {
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ASSERT_EQ(0x23U, dst[i]);
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}
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for (size_t i = 512; i < 1024; i++) {
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ASSERT_EQ(0x4cU, dst[i]);
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}
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}
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TEST(MemoryLocalTest, read_illegal) {
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MemoryLocal local;
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std::vector<uint8_t> dst(100);
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ASSERT_FALSE(local.ReadFully(0, dst.data(), 1));
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ASSERT_FALSE(local.ReadFully(0, dst.data(), 100));
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}
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TEST(MemoryLocalTest, read_overflow) {
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MemoryLocal local;
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// On 32 bit this test doesn't necessarily cause an overflow. The 64 bit
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// version will always go through the overflow check.
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std::vector<uint8_t> dst(100);
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uint64_t value;
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ASSERT_FALSE(local.ReadFully(reinterpret_cast<uint64_t>(&value), dst.data(), SIZE_MAX));
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}
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TEST(MemoryLocalTest, Read) {
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char* mapping = static_cast<char*>(
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mmap(nullptr, 2 * getpagesize(), PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0));
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ASSERT_NE(MAP_FAILED, mapping);
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mprotect(mapping + getpagesize(), getpagesize(), PROT_NONE);
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memset(mapping + getpagesize() - 1024, 0x4c, 1024);
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MemoryLocal local;
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std::vector<uint8_t> dst(4096);
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ASSERT_EQ(1024U, local.Read(reinterpret_cast<uint64_t>(mapping + getpagesize() - 1024),
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dst.data(), 4096));
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for (size_t i = 0; i < 1024; i++) {
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ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
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}
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ASSERT_EQ(0, munmap(mapping, 2 * getpagesize()));
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}
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TEST(MemoryLocalTest, read_hole) {
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void* mapping =
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mmap(nullptr, 3 * 4096, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
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ASSERT_NE(MAP_FAILED, mapping);
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memset(mapping, 0xFF, 3 * 4096);
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mprotect(static_cast<char*>(mapping) + 4096, 4096, PROT_NONE);
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MemoryLocal local;
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std::vector<uint8_t> dst(4096 * 3, 0xCC);
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ASSERT_EQ(4096U, local.Read(reinterpret_cast<uintptr_t>(mapping), dst.data(), 4096 * 3));
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for (size_t i = 0; i < 4096; ++i) {
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ASSERT_EQ(0xFF, dst[i]);
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}
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for (size_t i = 4096; i < 4096 * 3; ++i) {
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ASSERT_EQ(0xCC, dst[i]);
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}
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ASSERT_EQ(0, munmap(mapping, 3 * 4096));
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}
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} // namespace unwindstack
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