![]() ![]() With that added, termdebug can be launched with :Termdebug or with a custom mapping in your. vimrc so that you don’t have to enter that command for each Vim session. ![]() I’m not aware of any plugins that build upon termdebug. The built-in help page includes thorough documentation. Omitting will evaluate the expression under the cursor, which can also be performed by pressing KĪfter passing all breakpoints and running the program until termination, we can see 720 in the program window, which is the expected output for the calculation of 6!. This worked for me in gvim, but didn’t work reliably when running vim in a terminal.This requires the +balloon_eval compile-time feature.Hovering your mouse over variables in the editor window.Invoking gdb inspection commands directly in the gdb window.The values of variables can be inspected in various ways. Issuing vim commands :Step, :Over, :Finish, :Continue, :Stop.Clicking Step, Next, Finish, Cont, Stop, Eval in the editor window.Invoking gdb stepping commands directly in the gdb window.There are various ways to step through a program. Execution is paused at the first breakpoint, with the corresponding line highlighted. I’ve launched the program using the vim command :Run 6. An alternative way to launch a program is to use gdb’s start command, which will pause execution at the beginning of the program. Let’s use the value 6 to run the factorial program.īoth :Run and (gdb) run will pause execution at the first breakpoint. In either case, should be replaced by the program’s arguments. Or alternatively, a program can be launched by entering the run command directly in the gdb window. Update 2 6:45pm ET: On my version of vim, :Delete is used to remove breakpoints, but this was changed to :Clear in a commit on March 3, 2018. ![]() Lines with breakpoints are indicated by > in the editor window.īreakpoints can be removed with gdb commands or by navigating to the relevant lines and entering :Delete. (gdb) b factorialĪlternatively, breakpoints can be set by navigating to a line of code in the editor window and entering :Break. Setting Breakpointsīreakpoints can be set in the gdb window using ordinary gdb commands. (gdb) file factorialĪlternatively, we could have passed factorial as an argument when calling :Termdebug earlier. The following gdb command will load the program (highlighted in the image that follows). In addition to commands and/or mouse clicks, we can use the :Gdb command to jump to the gdb window. We can use the gdb window to load the program. ![]() We’ll have to compile the code using the -g flag, which will include debugger information in the compiled program. This window also has clickable buttons at the top for interacting with gdb. The editor window on the right-with the corresponding source code-will show breakpoints and highlight lines when stepping through a program. The bottom-left window is for interacting with the program loaded by gdb. The top-left window is for interacting with gdb. The tab will split into three windows, which I’ve rearranged so that the editor window is on the right, as shown below. Loading the termdebug PluginĪfter loading the factorial.c source code, let’s load the plugin. The path and/or name of gdb can be modified by setting the termdebugger variable before invoking the termdebug plugin. Before trying to debug with vim, I suggest verifying that gdb works as expected on your system. For macOS, gdb will have to be code signed, and I’ve found that gdb versions earlier than 8.3 are problematic (tested on macOS Mojave). For Ubuntu, this can be installed from the Ubuntu repo. In addition to vim, a working version of gdb is required for debugging. ![]()
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