Memory Leak Detection in MFC

This topic applies to:

Edition	Visual Basic	C#	F#	C++	Web Developer
Express				Native only
Pro, Premium, and Ultimate				Native only

MFC provides classes and functions for detecting memory that is allocated but never deallocated.

In This Section

• Tracking Memory Allocations
  Discusses the DEBUG_NEW macro, which you can use to locate memory leaks. Information includes considerations in Debug and Release versions, defining the macro in your source files, and object dumps.

• Enabling Memory Diagnostics
  Provides steps for enabling diagnostic tracing and selecting specific memory diagnostic features with afxMemDF (for more precise control).

• Taking Memory Snapshots
  Shows how to take snapshots of memory to help locate memory leaks.

• Viewing Memory Statistics
  Describes the CMemoryState::Difference function (compares memory) and the CMemoryState::DumpStatistics (prints memory statistics) and provides code examples.

• Object Dumps
  Provides information on object dumps, including the DumpAllObjectsSince function, example code, and considerations, as well as interpreting and customizing object dumps.

Related Sections

• Detecting and Isolating Memory Leaks
  How to use the C run-time library to detect memory leaks.

• MFC Debugging Techniques
  Links you to debugging techniques for MFC programs, including: afxDebugBreak, the TRACE macro, detecting memory leaks in MFC, MFC assertions, and reducing the size of MFC Debug builds.

• Debugging Visual C++
  Discusses some common debugging problems and techniques for C and C++ applications.