Double delete of memory

OnTestDoubledeleteofmemory()

Allocate a character array using new(), and deletes the array twice

Double free() of memory

OnTestDoublefreeofmemory()

Allocates a character array using malloc(), and frees the array twice

Incorrect free() of memory

OnTestIncorrectfreeofmemory()

Allocates an array with malloc(), then frees pointers that point into the array, not at the start of it.

Incorrect delete of memory

OnTestIncorrectdeleteofmemory()

Delete a pointer and an array pointer that is not in the heap.

Allocates an array, and tries to delete pointers that point into the array, but not at the start.

Deletes the array using the incorrect object form of delete.

Allocates an array, and deletes it using the correct array form of delete.

Allocates an array, and deletes it incorrectly with object form of delete.

Allocates an object and deletes it using the wrong array form of delete.

Incorrect realloc() of memory

OnTestIncorrectreallocofmemory()

Tries to reallocate a pointer that is not in the heap.

Allocates using new, then tries to reallocate using realloc(), before deleting.

Allocates using malloc(), then reallocates using pointers before and after the correct memory location.
Reallocates the memory using realloc(), then frees the memory.

Delete malloc'd memory

OnMemoryerrorsIncorrectusageDeletemallocdmemory()

Allocates with malloc(), deallocates with delete, then delete [], then free().
Allocates memory with calloc(), deallocate with delete, then delete [], then free().

Delete realloc'd memory

OnMemoryerrorsIncorrectusageDeletereallocdmemory()

Allocates with malloc(), reallocates using realloc(), deallocates with delete, then delete [], then free().

Free new'd memory

OnMemoryerrorsIncorrectusageFreenewdmemory()

Allocates using new, deallocates the memory using free(), then deallocates using delete [].

realloc() new'd memory

OnMemoryerrorsIncorrectusageReallocnewdmemory()

Allocates using new, reallocates using realloc(), then deallocates using delete [].

Incorrect HeapRealloc()

OnMemoryerrorsIncorrectusageIncorrectheaprealloc()

Allocates 4096 bytes on the heap and tries to reallocate wrong locations inside and outside the allocated area

Incorrect HeapFree()

OnMemoryerrorsIncorrectusageIncorrectheapfree()

Allocates 4096 bytes and tries to free wrong locations inside and outside the allocated area

Allocate memory and overwrite end of memory

OnTestAllocatememoryandoverwriteendofmemory()

Prompts for a memory size to allocate, then zeros 1 byte after the end of memory.

Allocate memory and overwrite beginning of memory

OnTestAllocatememoryandoverwritebeginningofmemory()

Prompts for a memory size to allocate, then zeros 1 byte before the start.

Objects on Stack

OnUninitialiseddataObjectsonstack()

Creates a TestClass object on the stack.
Some of its constructors deliberately leave data members uninitialized so can be tracked.

Objects on Heap

OnUninitialiseddataObjectsonheap()

Creates a TestClass object on the heap, then deletes it.

Overrun allocated memory

OnBufferoverrunOverun()

Allocates 100 bytes using new, and uses memcpy() to copy memory, deliberately overruning the end.

Underrun allocated memory

OnBufferoverrunUnderrun()

As above but underruning the start

Overrun stack memory

OnBufferoverrunOverrunstackmemory()

Declares a 100 byte array on the stack, and uses memcpy() to copy, deliberately overruning the end of the array

Underrun stack memory

OnBufferoverrunUnderrunstackmemory()

As above but underruning the start of the array

strcpy and wcscpy test

OnMemoryerrorsBufferoverrunStrcpyandwcscpytests()

Allocate some character arrays and use these functions to overwrite beginning  end of the buffers

Speculative Leak Test1

OnLeaksSpeculativeleaktest1()

Allocates an array of 10 pointers and a CString object for each one.

Deletes the array, but not the pointers.

If speculative leak detection is enabled, the leaked objects will be identified.

Speculative Leak Test2

OnLeaksSpeculativeleaktest2()

Allocates an array of 4 pointers populated with a CWnd, CBrush, CPen and CWnd objects.

DeleteS the array, but not the pointers.

If speculative leak detection is enabled, the leaked objects will be identified.

Allocate 0 bytes

OnLeaksAllocate0bytes()

Allocates an array of 0 characters using new

Allocate -10 bytes

OnLeaksAllocate10bytes()

Allocates an array of -10 characters using new

Allocate and don't use memory before deleting memory

OnLeaksAllocateanddontusememorybeforedeletingmemory()

Allocates memory using new, then deletes it without using it.
If the detect unused memory feature is enabled, the unused memory will be reported.

Allocate a class that allocates data and leaks

OnMemoryerrorsSpecialAllocateaclassthatallocatesdataandleaks()

An allocateInsideThis object is allocated.

Functions are called that allocate but don't free data held by the object, and then it's deleted.

If speculative leak detection is enabled, leaked objects will be identified.

Deeply recursive call to test hotspots

OnMemoryerrorsSpecialDeeplyrecursivecalltotestcallstacks()

Allocates and leaks an array of 50 bytes on the way out of each level of a 1500 level recursive call.

Deleted this usage

OnMemoryerrorsDeletedthisusage()

Allocates a class, deletes it and then calls a method in the deleted class.

If detection of calling functions for deleted objects is enabled, this will be identified.

Message Map Error

OnMemoryerrorsMessagemaperror()

Calls this function with too many parameters despite a signature with no params.

If detection of Broken Message Map hooks is enabled, this will be identified in Debug and Release builds.