Most Commonly Used gdb Commands
5.2.3 Passing Command Line Arguments to the Program Being Debugged
Many program need command line arguments to be passed to them at the time of execu- tion. There are multiple ways to pass these command line arguments when you debug a pro- 142 Chapter 5 • Working with GNU Debugger gram. Let us look at the following program that prints two command line arguments. The program prints a message if exactly two command line arguments are not specified. Note that this may not be the best program for this purpose and is used only to demonstrate a debugging process. The program name is arg.c and it is listed below. include stdio.h include string.h main int argc, char argv { if argc = 3 { printfYou have to use two command line arguments\n; exit-1; } printfThis program prints two command line arguments\n; printfThe first argument is : s\n, argv[1]; printfThe second argument is : s\n, argv[2]; } You have to create an executable file, arg, from arg.c source code file. If you run this program in gdb using the run command, it complains about command line arguments and ter- minates as expected. This is shown below. [rrconformix 5] gdb arg GNU gdb 5.0rh-5 Red Hat Linux 7.1 Copyright 2001 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it andor distribute copies of it under certain conditions. Type show copying to see the conditions. There is absolutely no warranty for GDB. Type show warranty for details. This GDB was configured as i386-redhat-linux... gdb run Starting program: homerr5arg You have to use two command line arguments Program exited with code 0377. gdb Note that no break point is set as we are not interested in stepping through the program line by line at this point. The following lines of another gdb session output show that you can specify command line arguments with the run command. Any arguments for the run command are considered as program arguments. These arguments are “ test1” and “test2” and are printed on the screen when you run the program.Parts
» the linux development platform 2003
» Requirement Gathering Life Cycle of a Software Development Project
» Writing Functional Specifications Life Cycle of a Software Development Project
» Creating Architecture and Design Documents
» Implementation and Coding Life Cycle of a Software Development Project
» Testing Life Cycle of a Software Development Project
» Technical documentation developed during the development process. This includes
» Technical documentation prepared for technical support staff. This includes technical
» End-user manuals and guides. This is the documentation for the end user to assist the
» Software Releases Support and New Features
» Hardware Platform Components of a Development System
» Operating System Components of a Development System
» Editors Components of a Development System
» Compilers and Assemblers Components of a Development System
» Debuggers Components of a Development System
» Version Control Systems Components of a Development System
» Selection Criteria for Hardware Platform Selection Criteria for Software Development Tools
» Creating Deadlines Managing Development Process
» Managing the Development Team
» Resolving Dependencies Managing Development Process
» Libraries Linux Development Platform Specifications LDPS and Linux
» Open Source Developers Network at http:www.osdn.org
» Extensibility What to Look for in an Editor
» References and Resources the linux development platform 2003
» Target machine. This is the machine for which the newly built compiler will generate
» Post-Installation Tasks Installing GNU Compiler
» Compiling to Intermediate Levels
» Compilation with Debug Support
» Compilation with Optimization Compiling a Program
» Compiling Source Code for Other Languages
» Linking a program Assembling a Program
» Creating Libraries the linux development platform 2003
» Standard Libraries the linux development platform 2003
» Compiling Fortran Programs the linux development platform 2003
» Smalltalk Oberon Other Compilers
» The target 2. Dependencies Basic Terminology
» The explicit rules 2. The implicit rules
» Input Files Introduction to GNU make
» Typical Contents of a Makefile
» Running make Introduction to GNU make
» Shell to Execute Commands Include Files
» The ftp server The The dnsresolver
» FTPOBJS OBJS Another Example of Makefile
» Explicit Rules The make Rules
» Implicit Rules The make Rules
» Defining Variables Types of Variables
» Pre-Defined Variables Automatic Variables
» Makefile in The Top Directory
» Makefile in common-dir Directory
» Makefile in the ftp-dir Directory
» Makefile in the tftp-dir Directory Makefile in the dns-dir Directory
» Building Everything Working with Multiple Makefiles and Directories
» The ifdef Directive Control Structures and Directives
» The ifndef Directive Control Structures and Directives
» Compilation Getting the Latest Version and Installation
» Most Commonly Used gdb Commands
» Passing Command Line Arguments to the Program Being Debugged
» The step and finish Commands
» Introduction to GDB Working with the Stack
» Displaying Program Variables Displaying Variables
» Automatic Displaying Variables with Each Command
» Displaying Environment Variables Displaying Variables
» Modifying Variables Displaying Variables
» Disabling Break Points Enabling Break Points
» Debugging Optimized Code the linux development platform 2003
» Debugging Running Processes the linux development platform 2003
» The kdbg Debugger Other Open Source Debuggers
» The ddd Debugger Other Open Source Debuggers
» The xxgdb Debugger Other Open Source Debuggers
» CVS Policies the linux development platform 2003
» Project Management and Communication
» Remote Repositories Checking out a Project
» Finding the Status of a Project
» Finding Differences Using the CVS Client
» Resolving Conflicts Using the CVS Client
» Checking the Project Back In Adding Files to a Project
» Removing Files from a Project
» Tags and Releases Using the CVS Client
» System Requirements Introduction to jCVS
» Installation Instructions Introduction to jCVS
» Using jCVS Introduction to jCVS
» Installing pcl-cvs Using Emacs with CVS
» Using pcl-cvs Using Emacs with CVS
» Have a shell account on the CVS server. 2. Create a publicprivate key pair on the client.
» Selecting Coding Styles Using indent Utility
» Formatting Braces Using indent Utility
» Formatting Declarations Using indent Utility
» Breaking Long Lines Using indent Utility
» Summary of Options Using indent Utility
» Using sed Utility Using cscope and cbrowser
» Generating C Function Prototypes from C Source Code Using cproto
» Using ltrace and strace Utilities
» Value 2. Type Name Using the nm Utility
» Using the ranlib Utility Using the strip Utility
» Using the strings Utility Using the addr2line Utility
» Host Machine Introduction to the Cross-Platform Development Process
» Target Machine Introduction to the Cross-Platform Development Process
» Cross Platform Development Cycle
» Embedded Systems and Moving Parts
» Embedded Systems and Power Consumption
» Embedded Operating Systems What are Embedded Systems?
» Knowledge of Target System Hardware
» Software Emulators Cross Compilations
» Using gdbserver with GNU Debugger
» Attaching to a Running Process Using gdbserver
» Arcom SBC-GX1 Board Hardware Used for Cross-Platform and Embedded Systems
» Artesyn PMPPC Mezzanine Card
» References the linux development platform 2003
» Java Compiler Java Virtual Machine
» Kaffe the linux development platform 2003
» The Jboss Java Development System
» Getting and Installing Java SDK from Sun Creating jar Files
» Creating Source Code File Compiling Java Code
» Running Java Applications Building Java Applications
» Using gcj to Build Java Applications
» Building Applets the linux development platform 2003
» Testing Applets with Netscape
» Jikes for Java the linux development platform 2003
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