在帖子如何判断一个C++对象是否在堆栈上 中, 又有人提出如何判断一个C++对象是否在堆上。
其实我们可以参照那个帖子的方法类似实现,我们知道堆就是Heap,在windows上我们可以通过GetProcessHeaps来得到所有的堆句柄,而我们这里只要知道Windows上的Heap Handle,其实就是堆的起始地址,就可以写如下代码了。
#include <iostream> #include <windows.h> using namespace std; BOOL IsObjectOnHeap(LPVOID pObject) { BOOL bRet(FALSE); DWORD dwHeaps = GetProcessHeaps(0, NULL); LPHANDLE pHeaps = new HANDLE[dwHeaps]; if(pHeaps != NULL) { MEMORY_BASIC_INFORMATION mi = {0}; GetProcessHeaps(dwHeaps, pHeaps); for(INT i=0; i<dwHeaps; ++i) { VirtualQuery((LPVOID)pHeaps[i], &mi, sizeof(mi)); if(pObject >= mi.BaseAddress && (DWORD)pObject < (DWORD)mi.BaseAddress + mi.RegionSize) { bRet = TRUE; break; } } } delete []pHeaps; return bRet; } int g_value = 10; int main(int argc, char* argv[]) { int nStackValue = 1; int* pNew = new int(10); int* pNewArray = new int[100]; static int static_value = 0; cout << "g_value:" << IsObjectOnHeap(&g_value) << endl; //false cout << "nStackValue:" << IsObjectOnHeap(&nStackValue) << endl; //false cout << "static_value:" << IsObjectOnHeap(&static_value) << endl; //false cout << "pNew:" << IsObjectOnHeap(pNew) << endl; //true cout << "pNewArray:" << IsObjectOnHeap(pNewArray) << endl; //true system("pause"); return 0; }
以上代码在Windows下测试通过(也只能在Windows上跑),如果有不正确的地方,欢迎指正。
原文地址: http://www.cppblog.com/weiym/archive/2012/05/12/174657.html