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/*
* Copyright (C) 2017 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 <stdint.h>
#include <memory>
#include <vector>
#include <gtest/gtest.h>
#include <unwindstack/Memory.h>
#include "MemoryFake.h"
namespace unwindstack {
class MemoryRangeTest : public ::testing::Test {
protected:
void SetUp() override {
process_memory_.reset();
memory_fake_ = new MemoryFake;
process_memory_.reset(memory_fake_);
}
std::shared_ptr<Memory> process_memory_;
MemoryFake* memory_fake_ = nullptr;
};
TEST_F(MemoryRangeTest, read_fully) {
memory_fake_->SetMemoryBlock(9000, 2048, 0x4c);
MemoryRange range(process_memory_, 9001, 1024, 0);
std::vector<uint8_t> dst(1024);
ASSERT_TRUE(range.ReadFully(0, dst.data(), dst.size()));
for (size_t i = 0; i < dst.size(); i++) {
ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
}
}
TEST_F(MemoryRangeTest, read_fully_near_limit) {
memory_fake_->SetMemoryBlock(0, 8192, 0x4c);
MemoryRange range(process_memory_, 1000, 1024, 0);
std::vector<uint8_t> dst(1024);
ASSERT_TRUE(range.ReadFully(1020, dst.data(), 4));
for (size_t i = 0; i < 4; i++) {
ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
}
// Verify that reads outside of the range will fail.
ASSERT_FALSE(range.ReadFully(1020, dst.data(), 5));
ASSERT_FALSE(range.ReadFully(1024, dst.data(), 1));
ASSERT_FALSE(range.ReadFully(1024, dst.data(), 1024));
// Verify that reading up to the end works.
ASSERT_TRUE(range.ReadFully(1020, dst.data(), 4));
}
TEST_F(MemoryRangeTest, read_fully_overflow) {
std::vector<uint8_t> buffer(100);
std::shared_ptr<Memory> process_memory(new MemoryFakeAlwaysReadZero);
std::unique_ptr<MemoryRange> overflow(new MemoryRange(process_memory, 100, 200, 0));
ASSERT_FALSE(overflow->ReadFully(UINT64_MAX - 10, buffer.data(), 100));
}
TEST_F(MemoryRangeTest, read) {
memory_fake_->SetMemoryBlock(0, 4096, 0x4c);
MemoryRange range(process_memory_, 1000, 1024, 0);
std::vector<uint8_t> dst(1024);
ASSERT_EQ(4U, range.Read(1020, dst.data(), dst.size()));
for (size_t i = 0; i < 4; i++) {
ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
}
}
TEST_F(MemoryRangeTest, read_non_zero_offset) {
memory_fake_->SetMemoryBlock(1000, 1024, 0x12);
MemoryRange range(process_memory_, 1000, 1024, 400);
std::vector<uint8_t> dst(1024);
ASSERT_EQ(1024U, range.Read(400, dst.data(), dst.size()));
for (size_t i = 0; i < dst.size(); i++) {
ASSERT_EQ(0x12U, dst[i]) << "Failed at byte " << i;
}
}
} // namespace unwindstack
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