/* * Copyright (C) 2018 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 <vector> #include <gtest/gtest.h> #include <unwindstack/Memory.h> #include "LogFake.h" namespace unwindstack { class MemoryOfflineBufferTest : public ::testing::Test { protected: void SetUp() override { ResetLogs(); memory_.reset(new MemoryOfflineBuffer(buffer_.data(), kStart, kEnd)); } static void SetUpTestCase() { buffer_.resize(kLength); for (size_t i = 0; i < kLength; i++) { buffer_[i] = i % 189; } } std::unique_ptr<MemoryOfflineBuffer> memory_; static constexpr size_t kLength = 0x2000; static constexpr uint64_t kStart = 0x1000; static constexpr uint64_t kEnd = kStart + kLength; static std::vector<uint8_t> buffer_; }; std::vector<uint8_t> MemoryOfflineBufferTest::buffer_; static void VerifyBuffer(uint8_t* buffer, size_t start_value, size_t length) { for (size_t i = 0; i < length; i++) { ASSERT_EQ((start_value + i) % 189, buffer[i]) << "Failed at byte " << i; } } TEST_F(MemoryOfflineBufferTest, read_out_of_bounds) { std::vector<uint8_t> buffer(1024); ASSERT_FALSE(memory_->ReadFully(0, buffer.data(), 1)); ASSERT_FALSE(memory_->ReadFully(0xfff, buffer.data(), 1)); ASSERT_FALSE(memory_->ReadFully(0xfff, buffer.data(), 2)); ASSERT_FALSE(memory_->ReadFully(0x3000, buffer.data(), 1)); ASSERT_FALSE(memory_->ReadFully(0x3001, buffer.data(), 1)); } TEST_F(MemoryOfflineBufferTest, read) { std::vector<uint8_t> buffer(1024); ASSERT_TRUE(memory_->ReadFully(kStart, buffer.data(), 10)); ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), 0, 10)); ASSERT_TRUE(memory_->ReadFully(kStart + 555, buffer.data(), 40)); ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), 555, 40)); ASSERT_TRUE(memory_->ReadFully(kStart + kLength - 105, buffer.data(), 105)); ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), kLength - 105, 105)); } TEST_F(MemoryOfflineBufferTest, read_past_end) { std::vector<uint8_t> buffer(1024); ASSERT_EQ(100U, memory_->Read(kStart + kLength - 100, buffer.data(), buffer.size())); VerifyBuffer(buffer.data(), kLength - 100, 100); } TEST_F(MemoryOfflineBufferTest, read_after_reset) { std::vector<uint8_t> buffer(1024); ASSERT_TRUE(memory_->ReadFully(kStart, buffer.data(), 100)); ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), 0, 100)); memory_->Reset(&buffer_[10], 0x12000, 0x13000); ASSERT_TRUE(memory_->ReadFully(0x12000, buffer.data(), 100)); ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), 10, 100)); ASSERT_EQ(50U, memory_->Read(0x13000 - 50, buffer.data(), buffer.size())); ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), 0x1000 - 50 + 10, 50)); } } // namespace unwindstack