Dumps an application's user mode heap

Usage Guide

User-Mode Dump Heap UMDH analyses a process’s heap allocations to detect memory leaks.UMDH only tracks allocations from the heap manager. Use leakdiag to track memory from other allocators. Version 8.1 of the tool is compatible with Windows 2003 SP2 and Windows XP x64 SP2 and earlier versions.

User mode stack tracing must be enabled for the process for this tool to work correctly. This is done via the Global Flags editor gflags.exe. The syntax is:
gflags –I my_process.exe +ust
Stack tracing should be disables after debugging is finished by running:
gflags –ust

Dumps can be triggered for a running process by obtaining the process ID (PID)and running the following: umdh –p:[PID] –f:dump_filename.log
Dumps can also be triggered to run when:

  • the process causes an exception
  • the process is exited
  • a hot-key is pressed

Tool Data

Operating Platform:Windows
Diagnostic Target:OS - Debugging
Tool Executable:umdh.exe
Obtain From:Microsoft Download Centre
Web Links:

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