HP gnu source-level debugger 5992-4701 manual And, bcopy. WDB 5.6 and later versions, Requirements

	and, bcopy. WDB 5.6 and later versions of the
	debugger also validates calls to strcat and
	strncat.
	NOTE: HP WDB 6.0 and later versions of the
	debugger improves performance of memory
	debugging when the string option is set for
	32-bit applications on HP-UX 11i v2 and later on
	Itanium systems. However, the performance
	degrades for 64-bit applications on HP-UX 11i
	v2 and later on Itanium systems.
set heap-check bounds [on	Allocates extra space at the beginning and end
off]	of a heap block during allocation and fills it with
	a specific pattern. When blocks are freed, WDB
	verifies whether these patterns are intact. If they
	are corrupted, an under flow or over- flow must
	have occurred and WDB reports the problem.
	This option increases the program's memory
	requirements.
set heap-check scramble [on	Scrambles a memory block and overwrites it with
off]	a specific pattern when it is allocated or
	deallocated. This change to the memory contents
	increases the chance that erroneous behaviors,
	such as attempting to access space that is freed
	or depending on initial values of malloc()
	blocks, cause the program to fail.
info dangling	Displays a list of all the dangling pointers and
	dangling blocks that are potential sources of
	memory corruption( may have false positives).
info corruption	Checks for corruption in the currently allocated
	heap blocks.In addition, it lists the potential
	in-blockcorruptions in all the freed blocks.
set heap-check	Collects a stack trace only when the size of the
min-leak-size num	leak exceeds the number of bytes you specify for
	this value. Larger values improve run-time
	performance. The default value is zero (0) bytes.
set heap-check frame-count	Controls the depth of the call stack collected.
num	Larger values increase run time. The default
	value is four (4) stack frames.
set heap-check header-size	Sets the Header guard for each block of the
num of bytes	allocated memory. The default number of bytes

162 HP-UX Configuration-Specific Information