Finding allocations and reallocations

 

You may wish to trace the history of a reallocated memory block.

 

The example program is used to examining where memory was allocated and reallocated.

 

This example is for the CRT, but the same techniques work for

 

•Win32 heaps

•GlobalAlloc() heaps

•LocalAlloc() heaps

•CoTaskMemAlloc()

•IMallocSpy

•user defined (custom allocators) heaps.

 

 

 

•Memory tab Display... ensure All Memory (leaks, errors, unleaked) is selected in the first combo box

 

launch nativeExample.exe wait until attaching is complete

 

 

 

 

Allocations menu C Runtime (C/C++) Heap Reallocate memory... shows the Test Memory dialog

 

 

Set the following to allocate a 10 bytes block and reallocate it twice, growing in size by 5 bytes each time.

 

•Number of bytes to allocate set to 10

 

•Number of times to allocate set to 2

 

•Reallocate check this

 

•Reallocation increment set to 5 OK

 

 

 

•Memory tab Refresh the display should refresh to include an item like the one below

 

 

•expand the item shows the reallocation history - an allocation and two reallocations

 

 

•expand the topmost entry in the callstack show the source code for the reallocation in CTeststakView::OnTestReallocatememory()

 

Note that the two reallocation locations are the same (because they are in a loop).

 

 

 

 

File menu Exit