HP WDB GUI 5.7 Reference Manual (September 2007)

Debugging with WDB GUI
Debugging Memory Problems
Chapter 3 77
• Enter Heap Check Interval and Heap Check Repeat Count in the Memory Check
window.
• Run the program after setting the required breakpoints.
• Select View->Memory Usage->Incremental Heap to view the incremental heap
profile.
The Incremental Heap View window displays the incremental heap profile graph for
the program. The incremental heap profile graph can be plotted based on the outstanding
allocations in the program or the actual heap profile, as follows:
— To view the incremental heap profile graph based on the outstanding allocations,
select the Allocation option in the Plot Graph frame. The Allocation Profile
displays the outstanding allocations (in KB) in the program with a unique color coding
for each interval.
— To view the incremental heap profile graph based on the actual heap profile, select the
Actual Heap option in the Plot Graph frame. The Heap Space Profile displays the
heap size in KB for the program.
To specify the time interval for displaying the incremental heap profile, you must select the
Select Time option and specify the start time and the end time from the Start Time list
menu and the End Time list menu. The listings for time in the Start Time list menu and the
End Time list menu are calculated by dividing the total program execution time into five
equal intervals. Additionally, you can enter a custom start time, or a custom end time for
displaying the incremental heap profile.
To view the incremental heap profile summary, click Summary Table. The summary table
displays the record ID, the start time, the end time, the heap interval, the heap start, the heap
end, the heap size in bytes, the number of allocated bytes, and the number of blocks used for
all the collected incremental heap profile records. Click on the required incremental heap
profile record to view the block allocation details for the corresponding record
Viewing the Arena Profile
HP WDB GUI 5.7 and later versions provide support to view the arena information for a
program running on HP-UX 11i v3.
To view the arena information, complete the following steps:
• Load the program to HP WDB GUI.
• Stop the program execution at the required breakpoints.
• Select View->Memory Usage->Heap Arena to view the arena information. The arena
information is displayed in the View Heap Arena window.