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#include <iostream>
#include <memory>
#include <vector>
#include <map>
#include <string>
#include <iomanip>
#include <mutex>
class MemoryTracker
{
private:
struct AllocationInfo
{
size_t size;
std::string file;
int line;
std::string function;
AllocationInfo() = default;
AllocationInfo(size_t s, const std::string& f, int l, const std::string& func)
: size(s), file(f), line(l), function(func) {}
};
static std::map<void*, AllocationInfo> s_Allocations;
static size_t s_TotalAllocated;
static size_t s_TotalFreed;
static size_t s_AllocationCount;
static size_t s_FreeCount;
static std::mutex s_Mutex;
public:
static void* Allocate(size_t size, const char* file = nullptr, int line = 0, const char* function = nullptr)
{
std::lock_guard<std::mutex> lock(s_Mutex);
void* ptr = malloc(size);
if (ptr)
{
s_TotalAllocated += size;
s_AllocationCount++;
if (file && function)
{
s_Allocations[ptr] = AllocationInfo(size, file, line, function);
}
else
{
s_Allocations[ptr] = AllocationInfo(size, "unknown", 0, "unknown");
}
std::cout << "[ALLOC] " << size << " bytes at " << ptr;
if (file && function)
{
std::cout << " (" << file << ":" << line << " in " << function << ")";
}
std::cout << std::endl;
}
return ptr;
}
static void Deallocate(void* ptr, size_t size = 0)
{
if (!ptr) return;
std::lock_guard<std::mutex> lock(s_Mutex);
auto it = s_Allocations.find(ptr);
if (it != s_Allocations.end())
{
size_t allocatedSize = it->second.size;
s_TotalFreed += allocatedSize;
s_FreeCount++;
std::cout << "[FREE ] " << allocatedSize << " bytes at " << ptr
<< " (" << it->second.file << ":" << it->second.line
<< " in " << it->second.function << ")" << std::endl;
s_Allocations.erase(it);
}
else
{
std::cout << "[FREE ] Unknown allocation at " << ptr << std::endl;
}
free(ptr);
}
static void PrintStatistics()
{
std::lock_guard<std::mutex> lock(s_Mutex);
std::cout << "\n=== Memory Statistics ===" << std::endl;
std::cout << "Total allocated: " << s_TotalAllocated << " bytes" << std::endl;
std::cout << "Total freed: " << s_TotalFreed << " bytes" << std::endl;
std::cout << "Current usage: " << (s_TotalAllocated - s_TotalFreed) << " bytes" << std::endl;
std::cout << "Allocation count: " << s_AllocationCount << std::endl;
std::cout << "Free count: " << s_FreeCount << std::endl;
std::cout << "Outstanding allocations: " << s_Allocations.size() << std::endl;
}
static void PrintLeaks()
{
std::lock_guard<std::mutex> lock(s_Mutex);
if (s_Allocations.empty())
{
std::cout << "\n=== No Memory Leaks Detected ===" << std::endl;
return;
}
std::cout << "\n=== Memory Leaks Detected ===" << std::endl;
std::cout << "Outstanding allocations:" << std::endl;
for (const auto& [ptr, info] : s_Allocations)
{
std::cout << " " << info.size << " bytes at " << ptr
<< " (" << info.file << ":" << info.line
<< " in " << info.function << ")" << std::endl;
}
}
static void Reset()
{
std::lock_guard<std::mutex> lock(s_Mutex);
s_Allocations.clear();
s_TotalAllocated = 0;
s_TotalFreed = 0;
s_AllocationCount = 0;
s_FreeCount = 0;
}
};
// 静态成员定义
std::map<void*, MemoryTracker::AllocationInfo> MemoryTracker::s_Allocations;
size_t MemoryTracker::s_TotalAllocated = 0;
size_t MemoryTracker::s_TotalFreed = 0;
size_t MemoryTracker::s_AllocationCount = 0;
size_t MemoryTracker::s_FreeCount = 0;
std::mutex MemoryTracker::s_Mutex;
// 宏定义用于自动捕获文件名、行号和函数名
#define TRACKED_NEW(size) MemoryTracker::Allocate(size, __FILE__, __LINE__, __FUNCTION__)
#define TRACKED_DELETE(ptr) MemoryTracker::Deallocate(ptr)
// 重载全局new和delete（可选）
void* operator new(size_t size)
{
return MemoryTracker::Allocate(size);
}
void operator delete(void* ptr) noexcept
{
MemoryTracker::Deallocate(ptr);
}
void operator delete(void* ptr, size_t size) noexcept
{
MemoryTracker::Deallocate(ptr, size);
}
void DetailedTrackingDemo()
{
std::cout << "=== Detailed Memory Tracking Demo ===" << std::endl;
MemoryTracker::Reset();
// 正常分配和释放
{
int* arr = static_cast<int*>(TRACKED_NEW(sizeof(int) * 10));
TRACKED_DELETE(arr);
}
// 使用智能指针
{
auto ptr = std::make_unique<int>(42);
// 自动释放
}
// 故意制造内存泄漏
{
int* leak = static_cast<int*>(TRACKED_NEW(sizeof(int) * 5));
// 故意不释放
}
MemoryTracker::PrintStatistics();
MemoryTracker::PrintLeaks();
}
int main()
{
DetailedTrackingDemo();
return 0;
}
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