PDF The Debuggers Handbook

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Table of contents

Android only Forward port on your device to your host. This can be done using adb , which is bundled with Fuse and can be invoked using uno adb. Using a standard Fuse installation and with a single Android device connected, run in a terminal or command prompt :. It's likely that you will have to re-run this command every time you reconnect your device. Also remember to remove the forwarding using e.

Otherwise the debugger port will be occupied. Press the Debug icon. Click on the green triangle the "play" icon and select Node. Set a breakpoint in your JavaScript code by adding a debugger; statement at some location where it will be run. For example, try putting it at the very start of your JavaScript code, like the following:. When your app is running, press the green triangle in Visual Studio Code to attach the debugger.

On Windows, if Windows Firewall asks for access for your app, allow it. When you hit the breakpoint that was previously added, the JS code will pause and Visual Studio Code will show the location in the code and allow you to view local variables, step into your code, continue, and so on. You can edit the register values by clicking in the Value column and entering a new value.


If the value for the register changed since the last time the debugger stopped, it will be highlighted in red. The memory widget allows you to view a section of memory directly. This enables you to get a lower-level view of what's happening while your program is running.

To display a segment of memory in the memory view widget, enter a memory address in the Address field. If the address is valid for the program being debugged, the memory view will display the memory values starting at the specified address. Memory values can be displayed in byte format, word format 2 bytes , or long word format 4 bytes by choosing an option from the Group By drop-down menu. The memory values will automatically be updated as you step through the program.

In addition to viewing the memory values, you can also use the memory widget to modify memory values. You can edit either the hex byte representation the left-hand section of the memory widget , or the ASCII representation the right-hand section of the memory widget. All changes will be applied immediately.

Debugging Your First Java Application - Help | IntelliJ IDEA

Nemiver can save your debugging sessions for you so that you can resume them at a later time. This includes saving information such as which executable is being debugged, what environment variables are set, what command-line options are passed to the executable, which files are open, and which breakpoints are set so that you can get back to where you left off last time as quickly as possible. Nemiver will save your session automatically on exit, so you don't even have to worry about it.

If you know the session ID of the session you want to run, you can start that debugging session from the command line. For example, if you want to run session number 3, you can do so with the following command: nemiver --session 3. Nemiver was written by Dodji Seketeli and Jonathon Jongsma, with contributions from many others. To find more information about Nemiver, please visit the Nemiver project website. This program is distributed under the terms of the GNU General Public license as published by the Free Software Foundation; either version 2 of the License, or at your option any later version.

Go to page content Go to main menu Go to the search field. About Users Administrators Developers. Nemiver Manual. Overview 2. Getting Started 3. Using Nemiver 4. Session Save and Restore 5. About Nemiver. Getting Started. Starting Nemiver 2.

What Is Debugging?

The Nemiver window 2. Choosing a Program to Debug. Starting Nemiver. Command line Type nemiver , then press Return. Additional Command-line Options.

Immunity Debugger Basics

The Nemiver window. Menubar The menus on the menubar contain all of the commands you need to use Nemiver. Toolbar The toolbar contains the basic debugging actions that can be used to run or step through the program being debugged. Source View Notebook When source files are open, this area will display source files of the program being debugged.

Status Notebook The Status notebook contains several tabs for displaying information about the program being debugged.

Navigation menu

These include the following: Call Stack Displays the current state of the call stack of the program being debugged. Variables Displays a list of all local variables and function arguments, in addition to their values and types. Target Terminal If the program being debugged prints any output to the terminal, it will be displayed in this tab. Breakpoints This tab displays a list of all breakpoints that have been set. Registers This tab displays all of the CPU registers and their values. Memory This tab displays a view of the current state of a specific memory location.

Debugging an Executable Program 2.

Attaching to a Running Program 2. Loading a Core File 2. Remote Debugging.

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Debugging an Executable Program. Using the Workbench 2. Using the Command Line. Using the Workbench. Passing Options on the Command Line.

IBM z/OS Debugger User's Guide

Attaching to a Running Program. You can also choose program specific settings that apply only to the currently loaded executable using Settings This Program , in the Program Settings dialog. Now run the program by selecting Execution Run. The program now executes as usual until it either exits, hits a breakpoint or watchpoint, or receives a signal. You can run the program with arguments, set a working directory, or set environment variables. To do this, choose Execution Arguments and specify your options in the Program Arguments dialog before you start the program.

You can also attach to a program that is currently running. To do this, first load the executable file like above. Then choose Execution Attach. From the list processes specify the one you want to attach to and click OK. The running program is halted not terminated , and the current point of execution is displayed in the source window. On some systems the list of processes may not be available. In this case a simple edit box is available where the process number can be specified.

When the program stops at a breakpoint, watchpoint, or due to a signal, the source code window displays the line where the program stopped. It is very common that the program stops due to a signal usually a SIGSEGV , segmentation violation in a function that is not part of the program, that you have written.