Dev C++ Debug Watch Variable

  
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Mar 10, 2014 Dev-C is looking for translators, because the author doesn't master all thirty languages Dev-C is (partially) translated in. So, if you're willing to translate Dev-C into a language or update the existing translation, don't hesitate to open up YourLanguage.lng and start translating/updating, using English.lng as the reference language. Jul 15, 2016 In all of our variable windows, when any values of the variables change the new values will appear in red text. Open up this window from Debug/Windows/Locals Window (Ctrl+Alt+V, L). Watch Windows. Evaluate variables and.expressions and keep track of the results. There are four Watch windows available to use. These windows start out. Sometimes, the problem with your C programming instructions can’t be determined by merely watching program flow. Nope, you have to get down and dirty in memory and look at a variable’s value while the code runs. The Code::Block’s debugger allows you to watch any variable in a program, showing you that variable’s contents as the. Expressions in the Watch section take effect in the application being debugged; an expression that modifies the value of a variable will modify that variable for the duration of the program. Multi-threaded debugging. The C/C extension for VS Code has the ability to debug multi-threaded programs.

Sep 18, 2009 Debugging with DevC. Keil is really not perfect with debug time watch variables as the compiler optimizes their information when it needs to. Try to set the optimization to Level 0 in target settings make your variables volatile to tell your compiler about a strict rule of not optimizing any kind of information regarding that variable.

After you have set up the basics of your debugging environment as specified in the configuration tutorials for each target compiler/platform, you can learn more details about debugging C/C++ in this section.

Visual Studio Code supports the following debuggers for C/C++ depending on the operating system you are using:

  • Linux: GDB
  • macOS: LLDB or GDB
  • Windows: the Visual Studio Windows Debugger or GDB (using Cygwin or MinGW)

Windows debugging with GDB

You can debug Windows applications created using Cygwin or MinGW by using VS Code. To use Cygwin or MinGW debugging features, the debugger path must be set manually in the launch configuration (launch.json). To debug your Cygwin or MinGW application, add the miDebuggerPath property and set its value to the location of the corresponding gdb.exe for your Cygwin or MinGW environment.

For example:

Cygwin/MinGW debugging on Windows supports both attach and launch debugging scenarios.

To learn more, see Configuring C/C++ debugging.

If you are debugging with GDB on Windows, see Windows Debugging with MinGW64.

Conditional breakpoints

Conditional breakpoints enable you to break execution on a particular line of code only when the value of the condition is true. To set a conditional breakpoint, right-click on an existing breakpoint and select Edit Breakpoint. This opens a small peek window where you can enter the condition that must evaluate to true in order for the breakpoint to be hit during debugging.

In the editor, conditional breakpoints are indicated by a breakpoint symbol that has a black equals sign inside of it. You can place the cursor over a conditional breakpoint to show its condition.

Dev C++ Debug Watch Variable

Function breakpoints

Function breakpoints enable you to break execution at the beginning of a function instead of on a particular line of code. To set a function breakpoint, on the Run view right-click inside the Breakpoints section, then choose Add Function Breakpoint and enter the name of the function on which you want to break execution.

Expression evaluation

VS Code supports expression evaluation in several contexts:

  • You can type an expression into the Watch section of the Run view and it will be evaluated each time a breakpoint is hit.
  • You can type an expression into the Debug Console and it will be evaluated only once.
  • You can evaluate any expression that appears in your code while you're stopped at a breakpoint.

Expressions in the Watch section take effect in the application being debugged; an expression that modifies the value of a variable will modify that variable for the duration of the program.

Multi-threaded debugging

The C/C++ extension for VS Code has the ability to debug multi-threaded programs. All threads and their call stacks appear in the Call Stack section:

Memory dump debugging

Dev C++ Debug Watch Variable

The C/C++ extension for VS Code also has the ability to debug memory dumps. To debug a memory dump, open your launch.json file and add the coreDumpPath (for GDB or LLDB) or dumpPath (for the Visual Studio Windows Debugger) property to the C++ Launch configuration, set its value to be a string containing the path to the memory dump. This will even work for x86 programs being debugged on an x64 machine.

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Additional symbols

If there are additional directories where the debugger can find symbol files (for example, .pdb files for the Visual Studio Windows Debugger), they can be specified by adding the additionalSOLibSearchPath (for GDB or LLDB) or symbolSearchPath (for the Visual Studio Windows Debugger).

For example:

or

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Locate source files

The source file location can be changed if the source files are not located in the compilation location. This is done by simple replacement pairs added in the sourceFileMap section. The first match in this list will be used.

For example:

GDB, LLDB, and MI Commands (GDB/LLDB)

For the C++ (GDB/LLDB) debugging environment, you can execute GDB, LLDB and MI commands directly through the debug console with the -exec command, but be careful, executing commands directly in the debug console is untested and might crash VS Code in some cases.

Other debugging features

  • Unconditional breakpoints
  • Watch window
  • Call stack
  • Stepping

For more information on debugging with VS Code, see this introduction to debugging in VS Code.

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Known limitations

Symbols and code navigation

All platforms:

  • Because the extension doesn't parse function bodies, Peek Definition and Go to Definition don't work for symbols defined inside the body of a function.

Debugging

Windows:

  • GDB on Cygwin and MinGW cannot break a running process. To set a breakpoint when the application is running (not stopped under the debugger), or to pause the application being debugged, press Ctrl-C in the application's terminal.
  • GDB on Cygwin cannot open core dumps.

Linux:

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  • GDB needs elevated permissions to attach to a process. When using attach to process, you need to provide your password before the debugging session can begin.

macOS:

  • LLDB:
    • When debugging with LLDB, if the Terminal window is closed while in break mode, debugging does not stop. Debugging can be stopped by pressing the Stop button.
    • When debugging is stopped the Terminal window is not closed.
  • GDB:
    • Additional manual install steps are required to use GDB on macOS. See Manual Installation of GDB for OS X in the README.
    • When attaching to a process with GDB, the application being debugged cannot be interrupted. GDB will only bind breakpoints set while the application is not running (either before attaching to the application, or while the application is in a stopped state). This is due to a bug in GDB.
    • Core dumps cannot be loaded when debugging with GDB because GDB does not support the core dump format used in macOS.
    • When attached to a process with GDB, break-all will end the process.

Next steps

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Read on to find out about:

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  • Basic Editing - Learn about the powerful Visual Studio Code editor.
  • Code Navigation - Move quickly through your source code.
  • Tasks - use tasks to build your project and more
  • Debugging - find out about the Visual Studio Code debugger

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