我的代码会导致内存泄漏吗? [英] Will my code cause memory leak?

问题描述

我下面有这三个函数，会导致内存泄漏，返回后如何删除结果?谢谢.

I have these three functions below, will it cause memory leak, how can I remove the result after return? Thank you.

static vector<string> explode (string original, char exploder) 
			{
				stringstream sstr(original);
				vector<string> ret_val;
				string buffer = "";
				while (getline(sstr, buffer, exploder)) 
					ret_val.push_back(buffer);
			 
				return ret_val;
			}

			static string netstr2cppstr(String ^ s)
			{
				// convert .NET System::String to string
				const char* cstr = (const char*) (Marshal::StringToHGlobalAnsi(s)).ToPointer();
				string sstr = cstr;
				Marshal::FreeHGlobal(System::IntPtr((void*)cstr));
				return sstr;
			 }

			static char *str2char(string s)
			{
				// string to char array
				char * buf;
				buf = new char[s.size()+1];
				strcpy(buf, s.c_str());
				return buf;
			}

推荐答案

此处可能引起泄漏的两行是'string sstr = cstr;'. (该字符串构造可能会抛出，因此cstr会泄漏)和'strcpy(buf，s.c_str());' (s.c_str()可能会抛出C ++'03(但不会抛出C ++ 0x)，因此buf会泄漏).除此之外，代码 看起来效率很低(尤其是爆炸)，但看起来并不危险.

The two lines here that could cause a leak are 'string sstr = cstr;' (that string construction could throw, so cstr would leak) and 'strcpy(buf, s.c_str());' (s.c_str() could throw in C++'03 (but not C++0x), so buf would leak). Other than that, the code looks quite inefficient (explode in particular) but doesn't look dangerous.

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