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/*
* 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
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