Supporting On Demand Business Applications with the IBM Problem Determination Tools (APA, DT, DT with Advanced Facilities, FA, File Export, FM, WS)

Chapter 4. Introducing Debug Tool and Debug Tool Utilities & Advanced Functions 81

Code coverage

Determining code coverage helps to improve test cases so the users can test programs more

thoroughly. Debug Tool Utilities provides the Coverage Utility, a tool to report which code

statements have been run by the used test cases. DTCU can be accessed by selecting option

3 on Debug Tool Utilities main panel, providing the user with the options shown in Figure 4-23.

Figure 4-23 Coverage Utility main panel

Using the code coverage report, you can enhance test cases to ensure that all valid code is

exercised and to identify dead code in your program.

Preparing IMS run-time environment

The user can create private IMS message regions that can be used to debug test applications

and, therefore, not interfere with other regions. For IMS Version 8, the Language Environment

run-time parameters table can be modified without relinking the applications.

4.2.2 Advanced functions

Debug Tool provides an extensive set of commands to debug programs. Debug Tool Utilities

and Advanced Functions enhances this set of commands by adding more than 15 new

commands, including:

ALLOCATE Allocates a file to an existing or temporary data set or a concatenation

of existing data sets.

CALL %FA Starts and instructs Fault Analyzer to provide a formatted dump of the

current state.

DESCRIBE Displays attributes of file allocations, references, compile units, and

execution environment.

FREE Releases previously allocated file.

LOAD Enables you to load a module for Debug Tool to use in debugging an

application. Use CLEAR LOAD to delete the previously LOADed

module.

LOADDEBUGDATA Specifies that a compile unit is an assembler compile unit and loads

the corresponding debug file.

82 Supporting On Demand Business Applications with the IBM Problem Determination Tools

PLAYBACK * Directs Debug Tool to start or stop recording steps and data history,

perform recorded STEP and RUNTO commands forward or backward.

SET ASSEMBLER Turns ON or OFF additional information useful when debugging an

assembler compile unit.

SET AUTOMONITOR Controls the automonitoring.