" Debugger plugin using gdb.
"
" Author: Bram Moolenaar
" Copyright: Vim license applies, see ":help license"
" Last Change: 2022 Nov 10
"
" WORK IN PROGRESS - The basics works stable, more to come
" Note: In general you need at least GDB 7.12 because this provides the
" frame= response in MI thread-selected events we need to sync stack to file.
" The one included with "old" MingW is too old (7.6.1), you may upgrade it or
" use a newer version from http://www.equation.com/servlet/equation.cmd?fa=gdb
"
" There are two ways to run gdb:
" - In a terminal window; used if possible, does not work on MS-Windows
" Not used when g:termdebug_use_prompt is set to 1.
" - Using a "prompt" buffer; may use a terminal window for the program
"
" For both the current window is used to view source code and shows the
" current statement from gdb.
"
" USING A TERMINAL WINDOW
"
" Opens two visible terminal windows:
" 1. runs a pty for the debugged program, as with ":term NONE"
" 2. runs gdb, passing the pty of the debugged program
" A third terminal window is hidden, it is used for communication with gdb.
"
" USING A PROMPT BUFFER
"
" Opens a window with a prompt buffer to communicate with gdb.
" Gdb is run as a job with callbacks for I/O.
" On Unix another terminal window is opened to run the debugged program
" On MS-Windows a separate console is opened to run the debugged program
"
" The communication with gdb uses GDB/MI. See:
" https://sourceware.org/gdb/current/onlinedocs/gdb/GDB_002fMI.html
" In case this gets sourced twice.
if exists