Before You Begin
The dbx command-line debugger is an interactive, source-level debugging tool. Debugging a Program With dbx is intended for programmers who want to debug an application using dbx commands. Users of dbx need with a working knowledge of Fortran, C, or C++, and some understanding of the Solaris Operating System (Solaris OS), or the Linux operating system, and UNIX® commands, .
Debugging a Program With dbx contains the following chapters and appendixes:
Chapter 1 gives you the basics of using dbx to debug an application.
Chapter 2 describes how to compile a program for debugging and how to start a debugging session.
Chapter 3 describes how to customize your debugging environment.
Chapter 4 tells you about visiting source files and functions; locating symbols; and looking up variables, members, types, and classes.
Chapter 5 describes how to run a program under dbx., including how to attach to a running program.
Chapter 6 describes how to set, clear, and list breakpoints and traces.
Chapter 7 tells you how to examine the call stack.
Chapter 8 shows you how to evaluate data; display the values of expressions, variables, and other data structures; and assign values to variables.
Chapter 9 describes how to use runtime checking to detect memory leak and memory access errors in your program automatically.
Chapter 10 describes the fix and continue feature of dbx .
Chapter 11 tells you how to find information about threads.
Chapter 13 describes how to use dbx to debug OpenMP code.
Chapter 12 describes several dbx facilities that help you debug child processes.
Chapter 14 tells you how to use dbx to work with signals.
Chapter 15 describes dbx support of C++ templates, and the commands available for handling C++ exceptions and how dbx handles these exceptions.
Chapter 16 introduces some of the dbx facilities you can use to debug a Fortran program.
Chapter 17 describes how you can use dbx to debug an application that is a mixture of Java code and C JNI (Java Native Interface) code or C++ JNI code.
Chapter 18 tells you how to use dbx at the machine-instruction level
Chapter 19 explains the differences between ksh-88 and dbx commands.
Chapter 20 describes dbx support for program that use dynamically linked, shared libraries.
Appendix A focuses on dbx commands that change your program or its behavior when you run it under dbx.
Appendix B tells you how to manage events in the program you are debugging.
Appendix C gives detailed syntax and functional descriptions of all of the dbx commands.
This Sun Studio release supports systems that use the SPARC® and x86 families of processor architectures: UltraSPARC®, SPARC64, AMD64, Pentium, and Xeon EM64T. The supported systems for the version of the Solaris Operating System you are running are available in the hardware compatibility lists at http://www.sun.com/bigadmin/hcl. These documents cite any implementation differences between the platform types.
In this document, these x86 related terms mean the following:
For supported systems, see the hardware compatibility lists.
The Sun Studio software and its man pages are not installed into the standard /usr/bin/ and /usr/share/man directories. To access the software, you must have your PATH environment variable set correctly (see Accessing the Software). To access the man pages, you must have your MANPATH environment variable set correctly (see Accessing the Man Pages).
For more information about the PATH variable, see the csh(1), sh(1), ksh(1), and bash(1) man pages. For more information about the MANPATH variable, see the man(1) man page. For more information about setting your PATH variable and MANPATH variable to access this release, see the installation guide or your system administrator.
Note - The information in this section assumes that your Sun Studio software is installed in the /opt directory on Solaris platforms and in the /opt/sun directory on Linux platforms. If your software is not installed in the default directory, ask your system administrator for the equivalent path on your system.
Use the steps below to determine whether you need to change your PATH variable to access the software.
1. Display the current value of the PATH variable by typing the following at a command prompt.
2. On Solaris platforms, review the output to find a string of paths that contain /opt/SUNWspro/bin. On Linux platforms, review the output to find a string of paths that contain /opt/sun/sunstudio11/bin.
If you find the path, your PATH variable is already set to access the software. If you do not find the path, set your PATH environment variable by following the instructions in the next procedure.
On Solaris platforms, add the following path to your PATH environment variable. If you have previously installed Forte Developer software, Sun ONE Studio software, or another release of Sun Studio software, add the following path before the paths to those installations.
On Linux platforms, add the following path to your PATH environment variable.
Use the following steps to determine whether you need to change your MANPATH variable to access the man pages.
1. Request the dbx man page by typing the following at a command prompt.
2. Review the output, if any.
If the dbx(1) man page cannot be found or if the man page displayed is not for the current version of the software, follow the instructions in the next procedure to set your MANPATH environment variable.
On Solaris platforms, add the following path to your MANPATH environment variable.
On Linux platforms, add the following path to your MANPATH environment variable.
The Sun Studio integrated development environment (IDE) provides modules for creating, editing, building, debugging, and analyzing the performance of a C, C++, or Fortran application.
The command to start the IDE is sunstudio. For details on this command, see the sunstudio(1) man page.
The correct operation of the IDE depends on the IDE being able to find the core platform. The sunstudio command looks for the core platform in two locations:
If the core platform is not installed or mounted to either of the locations where the sunstudio command looks for it, then each user on a client system must set the environment variable SPRO_NETBEANS_HOME to the location where the core platform is installed or mounted (/installation_directory/netbeans/3.5V11).
On Solaris platforms, each user of the IDE also must add /installation_directory/SUNWspro/bin to their $PATH in front of the path to any other release of Forte Developer software, Sun ONE Studio software, or Sun Studio software. On Linux platforms, each user of the IDE also must add /installation_directory/sunstudio11/bin to their $PATH in front of the path to any other release of Sun Studio software.
The path /installation_directory/netbeans/3.5V11/bin should not be added to the user's $PATH.
You can access the documentation at the following locations:
If your software is not installed in the /opt directory on a Solaris platform or the /opt/sun directory on a Linux platform, ask your system administrator for the equivalent path on your system.
The docs.sun.com web site (http://docs.sun.com) enables you to read, print, and buy Sun Microsystems manuals through the Internet. If you cannot find a manual, see the documentation index that is installed with the software on your local system or network.
Note - Sun is not responsible for the availability of third-party Web sites mentioned in this document. Sun does not endorse and is not responsible or liable for any content, advertising, products, or other materials that are available on or through such sites or resources. Sun will not be responsible or liable for any actual or alleged damage or loss caused by or in connection with the use of or reliance on any such content, goods, or services that are available on or through such sites or resources.
The documentation is provided in accessible formats that are readable by assistive technologies for users with disabilities. You can find accessible versions of documentation as described in the following table. If your software is not installed in the /opt directory, ask your system administrator for the equivalent path on your system.
HTML at http://docs.sun.com
HTML at http://docs.sun.com
For Solaris platforms, the following table describes related documentation that is available at /opt/SUNWspro/docs/index.html and at http://docs.sun.com. If your software is not installed in the /opt directory, ask your system administrator for the equivalent path on your system.
For Linux platforms, the following table describes related documentation that is available at file:/opt/sun/sunstudio10u1/docs/index.html and at http://docs.sun.com. If your software is not installed in the /opt/sun directory, ask your system administrator for the equivalent path on your system.
The following table describes related documentation that is available through the docs.sun.com web site.
Visit http://developers.sun.com/prodtech/cc to find these frequently updated resources:
You can find additional resources for developers at http://developers.sun.com.
If you have technical questions about this product that are not answered in this document, go to:
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