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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 <string.h>
#include <string>
#include <vector>
#include <gtest/gtest.h>
#include <unwindstack/Memory.h>
#include "MemoryFake.h"
namespace unwindstack {
TEST(MemoryTest, read32) {
MemoryFakeAlwaysReadZero memory;
uint32_t data = 0xffffffff;
ASSERT_TRUE(memory.Read32(0, &data));
ASSERT_EQ(0U, data);
}
TEST(MemoryTest, read64) {
MemoryFakeAlwaysReadZero memory;
uint64_t data = 0xffffffffffffffffULL;
ASSERT_TRUE(memory.Read64(0, &data));
ASSERT_EQ(0U, data);
}
struct FakeStruct {
int one;
bool two;
uint32_t three;
uint64_t four;
};
TEST(MemoryTest, read_string) {
std::string name("string_in_memory");
MemoryFake memory;
memory.SetMemory(100, name.c_str(), name.size() + 1);
std::string dst_name;
ASSERT_TRUE(memory.ReadString(100, &dst_name, 100));
ASSERT_EQ("string_in_memory", dst_name);
ASSERT_TRUE(memory.ReadString(107, &dst_name, 100));
ASSERT_EQ("in_memory", dst_name);
// Set size greater than string.
ASSERT_TRUE(memory.ReadString(107, &dst_name, 10));
ASSERT_EQ("in_memory", dst_name);
ASSERT_FALSE(memory.ReadString(107, &dst_name, 9));
}
TEST(MemoryTest, read_string_error) {
std::string name("short");
MemoryFake memory;
// Save everything except the terminating '\0'.
memory.SetMemory(0, name.c_str(), name.size());
std::string dst_name;
// Read from a non-existant address.
ASSERT_FALSE(memory.ReadString(100, &dst_name, 100));
// This should fail because there is no terminating '\0'.
ASSERT_FALSE(memory.ReadString(0, &dst_name, 100));
// This should pass because there is a terminating '\0'.
memory.SetData8(name.size(), '\0');
ASSERT_TRUE(memory.ReadString(0, &dst_name, 100));
ASSERT_EQ("short", dst_name);
}
TEST(MemoryTest, read_string_long) {
// This string should be greater than 768 characters long (greater than 3 times
// the buffer in the ReadString function) to read multiple blocks.
static constexpr char kLongString[] =
"one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen "
"sixteen seventeen eightteen nineteen twenty twenty-one twenty-two twenty-three twenty-four "
"twenty-five twenty-six twenty-seven twenty-eight twenty-nine thirty thirty-one thirty-two "
"thirty-three thirty-four thirty-five thirty-six thirty-seven thirty-eight thirty-nine forty "
"forty-one forty-two forty-three forty-four forty-five forty-size forty-seven forty-eight "
"forty-nine fifty fifty-one fifty-two fifty-three fifty-four fifty-five fifty-six "
"fifty-seven fifty-eight fifty-nine sixty sixty-one sixty-two sixty-three sixty-four "
"sixty-five sixty-six sixty-seven sixty-eight sixty-nine seventy seventy-one seventy-two "
"seventy-three seventy-four seventy-five seventy-six seventy-seven seventy-eight "
"seventy-nine eighty";
MemoryFake memory;
memory.SetMemory(100, kLongString, sizeof(kLongString));
std::string dst_name;
ASSERT_TRUE(memory.ReadString(100, &dst_name, sizeof(kLongString)));
ASSERT_EQ(kLongString, dst_name);
std::string expected_str(kLongString, 255);
memory.SetMemory(100, expected_str.data(), expected_str.length() + 1);
ASSERT_TRUE(memory.ReadString(100, &dst_name, 256));
ASSERT_EQ(expected_str, dst_name);
ASSERT_FALSE(memory.ReadString(100, &dst_name, 255));
expected_str = std::string(kLongString, 256);
memory.SetMemory(100, expected_str.data(), expected_str.length() + 1);
ASSERT_TRUE(memory.ReadString(100, &dst_name, 257));
ASSERT_EQ(expected_str, dst_name);
ASSERT_FALSE(memory.ReadString(100, &dst_name, 256));
expected_str = std::string(kLongString, 299);
memory.SetMemory(100, expected_str.data(), expected_str.length() + 1);
ASSERT_TRUE(memory.ReadString(100, &dst_name, 300));
ASSERT_EQ(expected_str, dst_name);
}
} // namespace unwindstack
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