HP gnu source-level debugger 5992-4701 Memory Debugging Commands in Interactive and Batch Mode

Table 14-1 Memory Debugging Commands in Interactive and Batch Mode

Command Description	Interactive mode	Batch mode
Toggles heap profiling and detection	set heap-check [on	check_heap= [on off] (or)
of leaks, bounds, and double free	off]	set heap-check [on off]
Toggle the leak detection capability	set heap-check leaks [on	check_leaks =[on off] (or)
	off]	set heap-check leaks [on
		off]
Toggle validation of calls to strcpy,	set heap-check	check_string= [on off] (or)
strncpy, memcpy, memccpy,	string [on off]	set heap-check string [on
memset, memmove, bzero, and		off]
bcopy
Toggle validation of calls to free()	set heap-check free	check_free = [on off] (or)
	[on off]	set heap-check free [on
		off]
Specify whether freed blocks should	set heap-check	scramble_blocks=[on off] (or)
be scrambled	scramble [on off]	set heap-check scramble [on
		off]
Toggle bounds check on heap blocks	set heap-check	check_bounds = [on off]
	bounds [on off]	(or) set heap-check bounds
		[on off]
Specify the minimum size of a block	set heap-check	min_heap_size = <num> (or) set
for stack trace collection. GDB will	min-heap-size <num>	heap-check min-heap-size
report blocks of size greater than or		<num>
equal to <num> at each call-site.
Specify the minimum size of a block	set heap-check	min_leak_size = <num> (or) set
for stack trace collection. GDB report	min-leak-size <num>	heap-check min-leak-size
leaks of blocks, smaller than this		<num>
value. However, no stack trace is
provided.

Specify the depth of call stack to be captured

Instruct GDB to stop, whenever a block at the given address gets allocated or deallocated.

Instructs malloc to return null after <num> invocations of malloc.

Instructs malloc to return null after <num> bytes have been allocated by malloc.

set heap-check	frame_count = <num> (or) set
frame-count <num>	heap-check frame-count <num>
set heap-check watch	Not supported in batch mode
address
set heap-check	Not supported in batch mode
null-check <num>
set heap-check	Not supported in batch mode
null-check-size
<size>

Specifies the seed value to be used	set heap-check	Not supported in batch mode
for generating random	seed-value <num>
null-check-count.

14.10 Debugging Memory Problems 177