main.c#include pch.h struct Object { int x,y,z; }; int main() { Print_MemoryUsage(strat); { // const char* string Cherno Cherno Cherno Cherno; // 栈分配 std::string string Cherno Cherno Cherno Cherno; // 15字节堆分配 Print_MemoryUsage(after string); { Object* obj new Object(); // std::unique_ptrObject obj std::make_uniqueObject(); //自动 delete Print_MemoryUsage(after new); delete obj; } Print_MemoryUsage(after delete); } Print_MemoryUsage(end); std::cin.get(); }pch.h#pragma once #include iostream #include string #include vector #include memory #include fstream #include sstream #include thread #include mutex #include chrono #include functional #include algorithm #include csignal // 内存追踪器 struct AllocationMetrics { uint32_t TotalAllocated 0; uint32_t TotalFreed 0; uint32_t CurrentUsage() { return TotalAllocated - TotalFreed; } }; static AllocationMetrics s_AllocationMetrics; // 重载的内存分配函数 void *operator new(size_t size) { s_AllocationMetrics.TotalAllocated size; std::cout Allocating size bytes\n; return malloc(size); // 实际分配 } // 重载数组版的 new[] void* operator new[](size_t size) { s_AllocationMetrics.TotalAllocated size; std::cout Allocating (array) size bytes\n; return malloc(size); } void operator delete(void* memory,size_t size) { s_AllocationMetrics.TotalFreed size; std::cout Freeing size bytes\n; free(memory); } // 重载数组版的 delete[] (带 size 参数) void operator delete[](void* memory,size_t size) noexcept { s_AllocationMetrics.TotalFreed size; std::cout Freeing size bytes\n; free(memory); } // 无参数的后备版本 void operator delete(void* memory) noexcept { free(memory); } // 重载数组版的 delete[] (无 size 参数作为后备) void operator delete[](void* memory) noexcept { std::cout Freeing (unknown size)\n; // 这里依然无法追踪 size但作为安全兜底 free(memory); } // 工具函数 static void Print_MemoryUsage(const char* msg) { std::cout Memory [ msg ]: \ s_AllocationMetrics.CurrentUsage() std::endl; }
)
