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138 lines
5.0 KiB
138 lines
5.0 KiB
/*
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* Copyright (C) 2021 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 <android-base/file.h>
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#include <gtest/gtest.h>
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#include <MemoryBuffer.h>
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#include <MemoryXz.h>
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namespace unwindstack {
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class MemoryXzTest : public ::testing::Test {
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protected:
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void SetUp() override { expected_content_ = ReadFile("boot_arm.oat.gnu_debugdata"); }
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static std::unique_ptr<MemoryBuffer> ReadFile(const char* filename) {
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std::string dir = android::base::GetExecutableDirectory() + "/tests/files/";
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std::string data; // NB: It is actually binary data.
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EXPECT_TRUE(android::base::ReadFileToString(dir + filename, &data)) << filename;
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EXPECT_GT(data.size(), 0u);
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auto memory = std::make_unique<MemoryBuffer>();
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EXPECT_TRUE(memory->Resize(data.size()));
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memcpy(memory->GetPtr(0), data.data(), data.size());
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return memory;
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}
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void VerifyContent(MemoryXz& xz, uint64_t offset, uint64_t size) {
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EXPECT_EQ(xz.Size(), expected_content_->Size());
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EXPECT_LE(offset + size, expected_content_->Size());
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std::vector<uint8_t> seen_content(size);
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xz.ReadFully(offset, seen_content.data(), size);
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EXPECT_EQ(memcmp(seen_content.data(), expected_content_->GetPtr(offset), size), 0);
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}
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std::unique_ptr<MemoryBuffer> expected_content_;
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};
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// Test the expected random-accessible format.
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TEST_F(MemoryXzTest, Decompress) {
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auto compressed = ReadFile("boot_arm.oat.gnu_debugdata.xz");
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MemoryXz xz(compressed.get(), 0, compressed->Size(), "boot_arm.oat");
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EXPECT_TRUE(xz.Init());
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EXPECT_GT(xz.BlockCount(), 1u);
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EXPECT_EQ(xz.BlockSize(), 16 * 1024u);
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EXPECT_EQ(xz.MemoryUsage(), 0u);
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VerifyContent(xz, 0, expected_content_->Size());
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EXPECT_EQ(xz.MemoryUsage(), xz.Size());
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}
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// Test one big monolithic compressed block.
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TEST_F(MemoryXzTest, DecompressOneBlock) {
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auto compressed = ReadFile("boot_arm.oat.gnu_debugdata.xz.one-block");
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MemoryXz xz(compressed.get(), 0, compressed->Size(), "boot_arm.oat");
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EXPECT_TRUE(xz.Init());
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EXPECT_EQ(xz.BlockCount(), 1u);
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EXPECT_GT(xz.BlockSize(), xz.Size());
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EXPECT_EQ(xz.MemoryUsage(), 0u);
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VerifyContent(xz, 0, expected_content_->Size());
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EXPECT_EQ(xz.MemoryUsage(), xz.Size());
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}
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// Test fallback (non-consistent block sizes).
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TEST_F(MemoryXzTest, DecompressOddSizes) {
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auto compressed = ReadFile("boot_arm.oat.gnu_debugdata.xz.odd-sizes");
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MemoryXz xz(compressed.get(), 0, compressed->Size(), "boot_arm.oat");
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EXPECT_TRUE(xz.Init());
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EXPECT_EQ(xz.BlockCount(), 1u);
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EXPECT_GT(xz.BlockSize(), xz.Size());
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EXPECT_EQ(xz.MemoryUsage(), xz.Size());
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VerifyContent(xz, 0, expected_content_->Size());
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}
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// Test fallback (non-power-of-2 block size).
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TEST_F(MemoryXzTest, DecompressNonPower) {
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auto compressed = ReadFile("boot_arm.oat.gnu_debugdata.xz.non-power");
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MemoryXz xz(compressed.get(), 0, compressed->Size(), "boot_arm.oat");
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EXPECT_TRUE(xz.Init());
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EXPECT_EQ(xz.BlockCount(), 1u);
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EXPECT_GT(xz.BlockSize(), xz.Size());
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EXPECT_EQ(xz.MemoryUsage(), xz.Size());
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VerifyContent(xz, 0, expected_content_->Size());
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}
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// Read first byte of some blocks.
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TEST_F(MemoryXzTest, ReadFirstByte) {
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auto compressed = ReadFile("boot_arm.oat.gnu_debugdata.xz");
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MemoryXz xz(compressed.get(), 0, compressed->Size(), "boot_arm.oat");
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EXPECT_TRUE(xz.Init());
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EXPECT_GT(xz.BlockCount(), 1u);
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EXPECT_EQ(xz.BlockSize(), 16 * 1024u);
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for (size_t i = 0; i < xz.BlockCount(); i += 3) {
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VerifyContent(xz, i * xz.BlockSize(), 1);
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}
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EXPECT_LT(xz.MemoryUsage(), xz.Size()); // We didn't decompress all blocks.
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}
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// Read last byte of some blocks.
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TEST_F(MemoryXzTest, ReadLastByte) {
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auto compressed = ReadFile("boot_arm.oat.gnu_debugdata.xz");
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MemoryXz xz(compressed.get(), 0, compressed->Size(), "boot_arm.oat");
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EXPECT_TRUE(xz.Init());
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EXPECT_GT(xz.BlockCount(), 1u);
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EXPECT_EQ(xz.BlockSize(), 16 * 1024u);
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for (size_t i = 1; i < xz.BlockCount(); i += 3) {
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VerifyContent(xz, i * xz.BlockSize() - 1, 1);
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}
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EXPECT_LT(xz.MemoryUsage(), xz.Size()); // We didn't decompress all blocks.
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}
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// Read across boundary of blocks.
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TEST_F(MemoryXzTest, ReadBoundary) {
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auto compressed = ReadFile("boot_arm.oat.gnu_debugdata.xz");
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MemoryXz xz(compressed.get(), 0, compressed->Size(), "boot_arm.oat");
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EXPECT_TRUE(xz.Init());
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EXPECT_GT(xz.BlockCount(), 1u);
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EXPECT_EQ(xz.BlockSize(), 16 * 1024u);
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for (size_t i = 1; i < xz.BlockCount(); i += 3) {
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VerifyContent(xz, i * xz.BlockSize() - 1, 2);
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}
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EXPECT_LT(xz.MemoryUsage(), xz.Size()); // We didn't decompress all blocks.
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}
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} // namespace unwindstack
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