Example Program

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This tutorial uses a simplified and somewhat artificial simulation of the dbx debugger. The source code for this C++ program is available in the sample applications zip file on the Oracle Developer Studio 12.6 downloads web page at http://www.oracle.com/technetwork/server-storage/developerstudio/downloads/index.html.

After accepting the license and downloading, you can extract the zip file in a directory of your choice.

If you have not already done so, download the sample applications zip file, and unpack the file in a location of your choice. The debug_tutorial application is located in the Debugger subdirectory of the OracleDeveloperStudio12.5-Samples directory.

Build the program.

$ make
CC -g   -c  main.cc
CC -g   -c  interp.cc
CC -g   -c  cmd.cc
CC -g   -c  debugger.cc
CC -g   -c  cmds.cc
CC -g   main.o interp.o cmd.o debugger.o cmds.o -o a.out

The program is made up of the following modules:

`cmd.h`	`cmd.cc`	Class Cmd, a base for implementing debugger commands
`interp.h`	`interp.cc`	Class Interp, a simple command interpreter
`debugger.h`	`debugger.cc`	Class Debugger, mimics the main semantics of a debugger
`cmds.h`	`cmds.cc`	Implementations of various debugging commands
`main.h`	`main.cc`	The `main()` function and error handling. Sets up an Interp, creates various commands and assigns them to the Interp. Runs the Interp.

Run the program and try a few dbx commands.

$ a.out
> display var
will display 'var'
> stop in X
> run running ...
stopped in X
var = {
        a = '100'
        b = '101'
        c = '<error>'
        d = '102'
        e = '103'
        f = '104'
}
> quit
Goodby
$