Stepping Through the Program Object

 

 

 

 

 

 

 

‡

 

Display Module

—

 

 

 

Source

 

Program:

RPGPGM

Library:

MYLIB

 

 

1*===============================================================

2 * RPGPGM - Program called by DEBUGEX to illustrate the STEP

3*functions of the ILE source debugger.

4*

5* This program receives a parameter InputParm from DEBUGEX￿,

6 * displays it, then returns.

7*===============================================================

8

 

 

9

D InputParm

 

S

 

 

4P 3

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

C

*ENTRY

 

 

PLIST

 

 

 

 

 

 

 

 

 

 

 

 

 

12

C

 

 

 

 

PARM

 

 

 

InputParm

 

 

 

 

 

 

 

 

13

C

InputParm

 

DSPLY

 

 

 

 

 

 

 

 

 

 

 

 

 

14

C

 

 

 

 

SETON

 

 

 

 

 

Bottom

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Debug . . . _________________________________________________________________

 

 

 

_______________________________________________________________________________

 

 

 

 

 

F3=End program

F6=Add/Clear breakpoint

F10=Step

F11=Display variable

 

 

 

 

 

 

F12=Resume

 

 

F17=Watch variable

F18=Work with watch

F24=More keys

 

 

 

 

 

ˆ Step completed at line 13.

 

 

 

 

 

 

 

 

 

˜

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure

94.

Stepping into RPGPGM

 

 

 

 

 

 

 

 

 

 

 

 

 

If

the

ILE source debugger is not set

to

accept OPM

programs,

or

i

debug

data

available,

then

you

will

see

a

blank

Display

Module

Source

 

a

message indicating

that

the

source is

not available. (An OPM program

data

if

it

was

compiled

with OPTION(*SRCDBG) or OPTION(*LSTDBG).)

 

 

 

Example

of

Stepping

 

Into

a

Subprocedure

 

 

 

 

 

 

 

 

 

 

 

In this example, you use

 

the

F22

(Step

Into) to

step

into the

subpr

which

is

in

the

module

DEBUGEX.

 

 

 

 

 

 

 

 

 

 

 

 

1. Ensure

that

the

Display

Module Source

display shows the source for

 

2. To

set

an

unconditional

breakpoint

at

line

120,

which

is the

last

r

 

 

ment

before

the

CALLP

operation,Breaktype120

and press

Enter.

 

 

 

 

 

3. Press F3 (End program) to leave the Display Module Source display.

4. Call

the

program.

The

program

stops at breakpoint

119.

 

5. Press

F22

(Step

into).

The call statement is

run

and

then

the displa

the

subprocedure, as

in Figure 95

on

page 199. The first

runnable sta

of RPGPGM

is processed

(line

13)

and

then

processing

stops.

198 ILE RPG for AS/400 Programmer's Guide

Page 221 Page 223
Page 222
Image 222
IBM AS/400 manual This example, you use F22 Step Into to Subpr Which Module, InputParm, Step completed at line
Page 221 Page 223

AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.
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