The ILE Source Debugger . This method, known as source- level debugging, has been around for years. With a source- level debugger, the program source statements are displayed on your workstation as the program is running. By stopping at selected statements (setting breakpoints) you can control how much of your program runs before you examine the program by displaying the values of the program's variables. When the program reaches a breakpoint, the program stops and displays the statement to which the breakpoint has been assigned and the statements surrounding it. This way you can easily examine and change the variables used in that particular section of code. Of course, you can page or jump through the program to access other variables, or you can step through single statements or groups of statements, examining program variables along the way.
Stepping Through the Program; Monitoring the Debug Information; Inline Debugging; Attaching to Local Process; Tutorial. Debugging with Chronon; Overview. To debug CoffeeScript, TypeScript, and Dart code, you need. Correction: Bugged by the Bugged by Interactive Debugger Tip. Bugged by the Bugged by Interactive Debugger Tip. How to Debug Multithreaded Programs in C#. By Rajeev Ranjan on Apr 22, 2015. This article is mainly focused on the process of multithread debugging. How to trace and debug in Visual C# Email Print; For a Microsoft Visual Basic.NET version of this article, see 313417. This article also assumes that you are familiar with program debugging. I have compiled the RPGLE source with DBGVIEW Option as *STMT. How to debug this program? Search IT Knowledge Exchange. IT Knowledge Exchange a TechTarget Expert Community. Questions & Answers.
Unfortunately for AS/4. IBM until recently. Unless you were willing to purchase a third- party source debugger, you were faced with using the very limited OS/4. That debugger required that you have the most recent source listing of a program before you could use it effectively. And even then it was cumbersome. However, the good news is that, with V3. R1, IBM has given you a source- level debug function for ILE programs and several other significant enhancements to the system debugger.
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Introducing ILE Source Debugger. All of the ILE languages on the AS/4. The ILE source debugger offers you these options. View the program source. However, you can perform source- level debugging for Original Program Model (OPM) RPG, COBOL, and CL programs with the Interactive Source Debugger (ISDB). ISDB is a free component of the Application Development Tool. Set/4. 00 (ADTS/4.
V3. R1. For more information about ISDB see . Most of you know the basics, but, for those who don't, the following background material will help you understand the ILE source debugger. The notion of modularity in programming has been around for some time. Ideally, an application would be made up of small, single- purpose programs that could call each other when a certain function was required. Of course, smaller programs mean more programs and more programs calling other programs (external program calls). Before ILE, external program calls could only be performed one way- dynamically. Dynamic calls occur at run time and require significant system overhead.
Therefore, on the AS/4. This is one reason most AS/4. With ILE, you can get around the performance issue of dynamic calls by linking your programs together as if they were one program. ILE languages utilize an intermediate object that is created from program source code. This intermediate object is known as a module object (object type *MODULE) and is not executable. One or more modules are linked together to create the program object (object type *PGM).
Any module, no matter what language is used to create it, can be linked to another module. Combining modules into a single executable program is called binding. Modules within a program can be called by one another just like programs call each other. Calls to modules are known as bound calls. The ILE RPG operation for a bound call is CALLB. The difference between a bound call and a dynamic call is that having modules call one another within a program is much faster than performing external program calls dynamically at run time.
Essentially, an ILE programmer can break an application into smaller, simpler, and more maintainable pieces without concern about performance degradation. For more information on ILE, see . Unlike OPM programs which store observability information in the program, ILE programs store observability in a program's modules. ILE observability is now split into two parts- debug information and the program template. ILE observability is stored. With the ILE source debugger, you actually debug at the module level, not the program level.
Unlike OPM programs which store observability information in the program, ILE programs store observability in a program's modules. ILE observability is now split into two parts- debug information and the program template. Figure 1 illustrates how ILE observability is stored.
To start the debugger, use the same Start Debug (STRDBG) command you're used to using. The system determines whether the program you want to debug is an OPM or ILE program. If it's an OPM program, the debugger works just as it used to and you can use the traditional debug commands, such as Add Breakpoint (ADDBKP), Add Trace (ADDTRC), and so on. If the program is an ILE program and you created its modules with the appropriate debug view (see the next section, . As you can see, the program source statements are displayed.
This initial display allows you to set your breakpoints. Unfortunately, you can't start the program from the initial display; you must get to a command line to start it. If you defined any breakpoints, the Display Module Source screen will reappear when the program is called, the source code will be positioned at the first breakpoint. To start the debugger, use the same Start Debug (STRDBG) command you're used to using. The system determines whether the program you want to debug is an OPM or ILE program. If it's an OPM program, the debugger works just as it used to and you can use the traditional debug commands, such as Add Breakpoint (ADDBKP), Add Trace (ADDTRC), and so on. If the program is an ILE program and you created its modules with the appropriate debug view (see the next section, .
As you can see, the program source statements are displayed. This initial display allows you to set your breakpoints.
Unfortunately, you can't start the program from the initial display; you must get to a command line to start it. If you defined any breakpoints, the Display Module Source screen will reappear when the program is called, the source code will be positioned at the first breakpoint. You'll do most of your debugging from the Display Module Source screen. As shown in 2, there is a command line at the bottom of the display. This is a debug command line where you can enter special debug commands.
For example, you can enter the Attributes (ATTR) command to display the attributes of a variable, the Breakpoint (BREAK) command to set an unconditional or a conditional breakpoint, or the Evaluate (EVAL) command to display a variable's value. You can also use the HELP command to display a list of valid commands with brief descriptions. ILE debugger commands, the command abbreviations, and a summarized description.
You'll do most of your debugging from the Display Module Source screen. As shown in Figure 2, there is a command line at the bottom of the display. This is a debug command line where you can enter special debug commands.
For example, you can enter the Attributes (ATTR) command to display the attributes of a variable, the Breakpoint (BREAK) command to set an unconditional or a conditional breakpoint, or the Evaluate (EVAL) command to display a variable's value. You can also use the HELP command to display a list of valid commands with brief descriptions. Figure 3 contains a complete list of the ILE debugger commands, the command abbreviations, and a summarized description. Now, suppose you want to examine some variables in the program being debugged in 2.
First, you establish a breakpoint so the program will stop running before it completes. You could place the cursor on the last (only) C- spec and press the Toggle Breakpoint function key (F6). A message is displayed at the bottom of the screen, Breakpoint added to line 1. Next, exit the program with F3 or F1. The program will run until the breakpoint is reached and then the program source will be displayed again. Now, you can examine any of the program's fields.
Now, suppose you want to examine some variables in the program being debugged in Figure 2. First, you establish a breakpoint so the program will stop running before it completes. You could place the cursor on the last (only) C- spec and press the Toggle Breakpoint function key (F6).
A message is displayed at the bottom of the screen, Breakpoint added to line 1. Next, exit the program with F3 or F1. The program will run until the breakpoint is reached and then the program source will be displayed again. Now, you can examine any of the program's fields. Say you want to examine the PKDDEC0. You could either position the cursor in the field and press F1. EVAL debug command at the command line.
EVAL PKDDEC0. 50. The field value is displayed at the bottom of the screen as PKDDEC0. If you want to display the hexadecimal value of field PKDFLD0. F1. 1 key. You must use the EVAL command with a slight modification. Key in this command to display the hexadecimal value at the bottom of the screen. EVAL PKDFLD0. 50. XIf you want to display the hexadecimal value of the BINARY0.
F1. 1 key. Use the EVAL command syntax just as you did for the PKDFLD0. EVAL BINARY0. 90.
XThe hexadecimal value of BINARY0. Now, suppose you want to display the value of the YYMMDD data structure.
Position the cursor in the YYMMDD data structure name and use the F1. EVAL command. EVAL YYMMDDThis time the Evaluate Expression display appears, as illustrated in 4. Notice that the screen displays all subfield values for data structure YYMMDD. Similarly, if you display an array, the debugger will display all elements of the array. The Evaluate Expression display appears because the value of the data structure YYMMDD can't be displayed at the bottom of the screen on a single line.
This time the Evaluate Expression display appears, as illustrated in Figure 4. Notice that the screen displays all subfield values for data structure YYMMDD.
Similarly, if you display an array, the debugger will display all elements of the array. The Evaluate Expression display appears because the value of the data structure YYMMDD can't be displayed at the bottom of the screen on a single line. You can also display the Evaluate Expression screen by pressing Enter from the Display Module Source screen when the command line is empty.