![]() (overlay-put ov 'face 'secondary-selection) ( let* ((ov (make-overlay (point-min) (point-min)))) The original code is commented out below, and the entire thing is tested and working in GNU Emacs 23. I’ve made a trivial modification to make it higlight the entire line, as opposed to the original which only highlights it up to the newline character of the current line. I use a snippet from here to highlight the marker line. It has been released as part of Emacs 22. NickRoberts is working on a version of GUD, GdbMode, specialised for GDB. src/gtk-gnutella: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.6, dynamically linked (uses shared libs), not strippedĪ nice way of getting that into a list is to strip everything after the colon (assuming no executable exists with a colon in its name (a reasonable assumption)) with cut: cut -f1 -d: xtype f -perm +111 -print0 | xargs -0 file | grep "ELF" One can generate a list of potential candidates using find: $ find. All one needs for completion is a list of files to be read into using something like SubprocessCompletion. NickRobertsĬompletion can be used as a way of passing a list of potential executables with their complex paths destined for gdb. The Perl debugger cannot (yet) be used via the GUD interface. If you want more than a command window for interaction, try gdb-many-windows.It would be nice to use the Gud menu in the code window. Unfortunately, this doesn’t add the Gud menu to the code-window MenuBar.switch over to the gud window and run, and use the Gud.put the TextCursor on a line and do M-x gud-break (bound to C-x SPC).Switch your other window over to the code window.M-x gdb # as ‘gdb hello’ this will start a gdb in the code window.M-x compile it with gcc -Wall -g hello.c -o hello # this will split screen.Did you compile with -g? The Emacs info manual (now included with Emacs 22) describes debugging with Emacs. ![]() It should display the source code listing. Can someone do a step by step for a small simple program like the looping hello world with a breakpoint and source buffer? GUD seems not to do the useful thing of displaying the source code listing in an emacs buffer. What about using it in emacs? For me, it seems no different than running gdb in a shell. GUD does useful things like displaying source code listings in an Emacs buffer (so that you can effectively step through code in your editor), providing consistent Emacs-like keybindings for various debugger commands (such as setting breakpoints and stepping through code), and a variety of other enhancements that make using a debugger with Emacs a more productive experience. Among the supported languages are Lisp, C, C++, Perl etc.Įlisp newbies needing to “just print stuff” (e.g., value of a variable) to *Messages* and the minibuffer? Use ‘message’: (message "logging %S" foo) Debugging with GUDīoth Emacs and XEmacs ship with the GrandUnifiedDebugger (GUD) for interacting with a command-line debugger (such as gdb). There are some routines to comment lines or regions of code in an uniform way, too. It has functions to insert output statements that display unique strings and skeletons to construct code to print out values of variables. If you like to debug your code by inserting output statements at critical/interesting points, have a look at ll-debug.el, available at To see info about debugging Emacs itself, see: DebugEmacs. ![]() This page is about debugging your programs.
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