Debugging Dynamic Memory Usage Errors Using HP WDB v6.3 (5900-2181, August 2012)

Table 16 Commonly Used Commands for Memory Debugging (continued)
Batch ModeInteractive Mode/Attach ModeDescription
set heap-check scramble
<on/off>
set heap-check scramble
<on/off>
Enables you to scramble blocks.
set heap-check bounds
<on/off>
set heap-check bounds
<on/off>
Enables you to check for out-of-bounds
corruption when the block is freed.
set heap-check string
<on/off>
set heap-check string
<on/off>
Enables validation of calls to
strcpy(), strncpy(), memcpy(),
memccpy(),memset(), memmove(),
bzero(), and, bcopy()
set heap-check frame-count
<num>
set heap-check frame-count
<num>
Enables you to set the number of
frames to be printed for leak and heap
profiles.
set heap-check min-heap-size
<num>
set heap-check min-heap-size
<num>
Enables you to set the minimum block
size to report in heap profiles.
set heap-check min-leak-size
<num>
set heap-check min-leak-size
<num>
Enables you to set the minimum block
size to use for leak detection.
Not supported in Batch Modeset heap-check watch addressStops program execution when the
block at the given address is allocated
or de-allocated
Not supported in Batch Modeinfo corruptionChecks for corruption in the currently
allocated heap blocks and optionally
lists the in-block corruptions in the
freed blocks.
Not supported in Batch Modeinfo danglingDisplays a list of all the dangling
pointers and dangling blocks that are
potential sources of memory
corruption.
Not supported in Batch Modeset heap-check null-check
<num>
Forces malloc() to return NULL after
<N> invocations of malloc()
Not supported in Batch Modeset heap-check
null-check-size <size>
Forces malloc() to return NULL after
<N> bytes are allocated by the
program
Not supported in Batch Modecatch nomemEnables the user to gain control over
an out-of-memory event. The user can
step through program execution after
the nomem event is detected.
Not supported in Batch Modeset heap-check seed-value
<num>
Defines the seed-value for random
number calculation for the set
heap-check null-check random
command
Not supported in Batch Modeset heap-check random-range
<num>
Forces malloc() to return NULL after
random number of invocations of
malloc()
Not supported in Batch Modeset heap-check resetThis command resets the data existing
in the file for incremental profiling and
creates a new data file. The old data
in the file is erased.
Not supported in Batch Modeset heap-check interval
<num>
Starts the incremental heap growth
profile. All allocations prior to the
execution of this command are
ignored. If incremental heap growth
profile is already on, executing this
command resets the counters and
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