Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Memory Leak Problem with Borland 5.0.1 Multithread Libraries!

Posted on 1997-05-01
2
433 Views
Last Modified: 2013-12-14
Hi there -

I have a memory leak problem with an HTTP server application that is written using Borland C++ 5.0.1. It runs fine when compiled as a single threaded app.

The memory leak shows up when the app is compiled with the
multi-threading option enabled even though there are no other threads being explicitly created.

We can reproduce the error with the following 12 lines of code:

// -------- Begin test code --------

// Test for memory leak with Borland 5.0.1 and Windows NT4.0 SP2

// Compile this without the multithread option and everything is fine.

// Compile with the multithread option (under TargetExpert),
// and it leaks memory rather quickly.

#pragma hdrstop
#include <vector>
#include <string>

main() {
   while(true) {
      std::vector<std::string> vect;
      for (int i = 0; i != 10; i++) {
        vect.push_back("Quack");
      };
   };
};

// -------- End test code --------

0
Comment
Question by:david.april
2 Comments
 
LVL 3

Accepted Solution

by:
gaohong earned 200 total points
ID: 1163161
Do you use STL or you just give the example to show Multi thread
leaking. If you do not use STL, then you could use something
else to check the leak is from STL or multithread. If it from
multithread then you have no choice, except contact Borland, wait
for BC++5.2. If it is from STL, you might do something by either
using your own vector container or other version of STL.

hope this can help
0
 

Author Comment

by:david.april
ID: 1163162
I am using STL (Borland's) and that appears to be where the problem is. I have since downloaded SGI's STL implementation (actually the additional port from Boris Fomitchev's page at
http://www.ipmce.su/people/fbp/stl/stlport.html) and am trying to see if it makes a difference.

FWIW, Borland has indicated that this problem is not fixed in BC5.2, but a tech there is also looking at their STL source to dig into it more.

Dave
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction This article is the first in a series of articles about the C/C++ Visual Studio Express debugger.  It provides a quick start guide in using the debugger. Part 2 focuses on additional topics in breakpoints.  Lastly, Part 3 focuses on th…
Update (December 2011): Since this article was published, the things have changed for good for Android native developers. The Sequoyah Project (http://www.eclipse.org/sequoyah/) automates most of the tasks discussed in this article. You can even fin…
The viewer will learn how to use and create new code templates in NetBeans IDE 8.0 for Windows.
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

792 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question