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dap-mode.el
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dap-mode.el
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;;; dap-mode.el --- Debug Adapter Protocol mode -*- lexical-binding: t; -*-
;; Copyright (C) 2019-2024 emacs-lsp maintainers
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;; Author: Ivan Yonchovski <[email protected]>
;; Keywords: languages, debug
;; URL: https://github.com/emacs-lsp/dap-mode
;; Package-Requires: ((emacs "27.1") (dash "2.18.0") (lsp-mode "6.0") (bui "1.1.0") (f "0.20.0") (s "1.12.0") (lsp-treemacs "0.1") (posframe "0.7.0") (ht "2.3") (lsp-docker "1.0.0"))
;; Version: 0.8
;;; Commentary:
;; Debug Adapter Protocol client for Emacs.
;;; Code:
(require 'lsp-mode)
(require 'json)
(require 'f)
(require 'dash)
(require 'dap-overlays)
(require 'cl-lib)
(require 'ansi-color)
(require 'posframe)
(require 'ht)
(require 'lsp-docker)
(require 'dap-launch)
(require 'dap-tasks)
(defcustom dap-breakpoints-file (expand-file-name (locate-user-emacs-file ".dap-breakpoints"))
"Where to persist breakpoints"
:group 'dap-mode
:type 'file)
(defcustom dap-print-io nil
"If non-nil, print all messages to and from the DAP to messages."
:group 'dap-mode
:type 'boolean)
(defcustom dap-external-terminal '("xterm" "-T" "{title}"
"-hold" "-e" "sh" "-c" "exec {command}")
"Command to launch the external terminal for debugging.
When specifying that the program be run in an external terminal,
this command is used to launch it. It shall be a list of strings,
the first of which is the program to run and the rest of which
are arguments to pass to it. Special expansion is performed:
{command} will be replaced with the program to execute.
{display} will be replaced with window title.
See also `dap-default-terminal-kind'."
:group 'dap-mode
:type '(repeat string))
(defun dap--make-terminal-buffer (title debug-session)
"Generate an internal terminal buffer.
The name is derived from TITLE and DEBUG-SESSION. This function
should be used in `dap-internal-terminal-*'."
(generate-new-buffer
(format "*%s %s*"
(dap--debug-session-name debug-session)
(if title (concat "- " title) "console"))))
(declare-function vterm-mode "ext:vterm" (&optional arg))
(defvar vterm-shell)
(defvar vterm-kill-buffer-on-exit)
(defun dap-internal-terminal-vterm (command title debug-session)
(with-current-buffer (dap--make-terminal-buffer title debug-session)
(require 'vterm)
(let ((vterm-shell command)
(vterm-kill-buffer-on-exit nil))
(vterm-mode)
;; TODO: integrate into dap-ui
(display-buffer (current-buffer)))))
(defun dap-internal-terminal-shell (command title debug-session)
(let ((buf (dap--make-terminal-buffer title debug-session)))
(async-shell-command command buf buf)))
(defun dap-internal-terminal-auto (command title debug-session)
"Run COMMAND with an auto-detected terminal.
If `vterm' is loaded or auto-loaded, use vterm. Otherwise, use
`async-shell-command'."
;; NOTE: 'vterm is autoloaded. This means that (fboundp 'vterm) will yield t
;; even before vterm is loaded.
(if (fboundp 'vterm)
(dap-internal-terminal-vterm command title debug-session)
(dap-internal-terminal-shell command title debug-session)))
(defcustom dap-internal-terminal #'dap-internal-terminal-auto
"Terminal used with :console \"integratedTerminal\".
It is a function that shall take three arguments: the command to
run, as a string, the title from the debug adapter (may be nil)
and the debug session and it should execute COMMAND. Aside from
that, it can do anything and is itself responsible for displaying
any buffers, ....
If you are looking at implementing your own such function, see
also `dap--make-terminal-buffer'."
:group 'dap-mode
:type '(radio
(const :tag "auto-detect" :value dap-internal-terminal-auto)
(const :tag "vterm" :value dap-internal-terminal-vterm)
(const :tag "asnyc-shell" :value dap-internal-terminal-shell)
(function :tag "Custom function")))
(defcustom dap-output-buffer-filter '("stdout" "stderr")
"If non-nil, a list of output types to display in the debug output buffer."
:group 'dap-mode
:type 'list)
(defcustom dap-label-output-buffer-category nil
"If non-nil, content that is printed to the output buffer will be labelled
based on DAP protocol category."
:group 'dap-mode
:type 'boolean)
(defcustom dap-auto-show-output t
"If non-nil, the output buffer will be shown automatically."
:group 'dap-mode
:type 'boolean)
(defcustom dap-output-window-min-height 10
"The minimum height of the output window."
:group 'dap-mode
:type 'number)
(defcustom dap-output-window-max-height 20
"The maximum height of the output window."
:group 'dap-mode
:type 'number)
(defcustom dap-inhibit-io t
"If non-nil, the messages will be inhibited."
:group 'dap-mode
:type 'boolean)
(defcustom dap-terminated-hook nil
"List of functions to be called after a debug session has been terminated.
The functions will receive the debug session that
has been terminated."
:type 'hook
:group 'dap-mode)
(defcustom dap-stopped-hook nil
"List of functions to be called after a breakpoint has been hit."
:type 'hook
:group 'dap-mode)
(defcustom dap-session-changed-hook nil
"List of functions to be called after sessions have changed."
:type 'hook
:group 'dap-mode)
(defcustom dap-loaded-sources-changed-hook nil
"List of functions to be called after loaded sources have changed for
the session."
:type 'hook
:group 'dap-mode)
(defcustom dap-session-created-hook nil
"List of functions to be called after session have been created.
It will be called with one argument - the created session."
:type 'hook
:group 'dap-mode)
(defcustom dap-continue-hook nil
"List of functions to be called after application started.
The hook is called after application has been stopped/started(e.
g. after calling `dap-continue')"
:type 'hook
:group 'dap-mode)
(defcustom dap-executed-hook nil
"List of functions that will be called after execution and processing request."
:type 'hook
:group 'dap-mode)
(defcustom dap-breakpoints-changed-hook nil
"List of functions that will be called after breakpoints have changed.
The hook will be called with the session file and the new set of breakpoint
locations."
:type 'hook
:group 'dap-mode)
(defcustom dap-position-changed-hook nil
"List of functions that will be called after cursor position has changed."
:type 'hook
:group 'dap-mode)
(defcustom dap-stack-frame-changed-hook nil
"List of functions that will be called after active stack frame has changed."
:type 'hook
:group 'dap-mode)
(defcustom dap-stack-trace-limit 1000
"Number of stack frames to return in the automatic stack trace
request on hitting a breakpoint. 0 means to return all frames."
:group 'dap-mode
:type 'number)
(defvar dap--debug-providers (make-hash-table :test 'equal))
(defcustom dap-debug-template-configurations nil
"Plist Template configurations for DEBUG/RUN."
:safe #'listp
:group 'dap-mode
:type '(plist))
(defcustom dap-auto-configure-features '(sessions locals breakpoints expressions controls tooltip)
"Windows to auto show on debugging when in dap-ui-auto-configure-mode."
:group 'dap-mode
:type '(set (const :tag "Show sessions popup window when debugging" sessions)
(const :tag "Show locals popup window when debugging" locals)
(const :tag "Show breakpoints popup window when debugging" breakpoints)
(const :tag "Show expressions popup window when debugging" expressions)
(const :tag "Show REPL popup window when debugging" repl)
(const :tag "Enable `dap-ui-controls-mode` with controls to manage the debug session when debugging" controls)
(const :tag "Enable `dap-tooltip-mode` that enables mouse hover support when debugging" tooltip)))
(defconst dap-features->windows
'((sessions . (dap-ui-sessions . dap-ui--sessions-buffer))
(locals . (dap-ui-locals . dap-ui--locals-buffer))
(breakpoints . (dap-ui-breakpoints . dap-ui--breakpoints-buffer))
(expressions . (dap-ui-expressions . dap-ui--expressions-buffer))
(repl . (dap-ui-repl . dap-ui--repl-buffer))))
(defconst dap-features->modes
'((controls . (dap-ui-controls-mode . posframe))
(tooltip . dap-tooltip-mode)))
(defvar dap--debug-configuration nil
"List of the previous configuration that have been executed.")
(defvar dap-connect-retry-count 1000
"Retry count for dap connect.")
(defvar dap-connect-retry-interval 0.02
"Retry interval for dap connect.")
(eval-and-compile
(defun dash-expand:&dap-session (key source)
`(,(intern-soft (format "dap--debug-session-%s" (eval key))) ,source)))
(cl-defstruct dap--debug-session
(name nil)
;; ‘last-id’ is the last JSON-RPC identifier used.
(last-id 0)
(proc nil :read-only t)
;; ‘response-handlers’ is a hash table mapping integral JSON-RPC request
;; identifiers for pending asynchronous requests to functions handling the
;; respective responses. Upon receiving a response from the language server,
;; ‘dap-mode’ will call the associated response handler function with a
;; single argument, the deserialized response parameters.
(response-handlers (make-hash-table :test 'eql) :read-only t)
;; DAP parser.
(parser (make-dap--parser) :read-only t)
(output-buffer nil)
(thread-id nil)
;; reference to the workspace that holds the information about the lsp workspace.
(workspace nil)
(threads nil)
(thread-states (make-hash-table :test 'eql) :read-only t)
(active-frame-id nil)
(active-frame nil)
(cursor-marker nil)
;; one of 'pending 'running 'terminated 'failed
(state 'pending)
;; hash table containing mapping file -> active breakpoints.
(breakpoints (make-hash-table :test 'equal) :read-only t)
;; hash table tread-id -> stack frame
(thread-stack-frames (make-hash-table :test 'eql) :read-only t)
;; the arguments that were used to start the debug session.
(launch-args nil)
;; path translation functions
(local-to-remote-path-fn nil)
(remote-to-local-path-fn nil)
;; Currently-available server capabilities
(current-capabilities (make-hash-table :test 'equal))
(error-message nil)
(loaded-sources nil)
(program-proc)
;; Optional metadata to set and get it.
(metadata (make-hash-table :test 'eql))
;; when t the output already has been displayed for this buffer.
(output-displayed))
(cl-defstruct dap--parser
(waiting-for-response nil)
(response-result nil)
;; alist of headers
(headers '())
;; message body
(body nil)
;; If non-nil, reading body
(reading-body nil)
;; length of current message body
(body-length nil)
;; amount of current message body currently stored in 'body'
(body-received 0)
;; Leftover data from previous chunk; to be processed
(leftovers nil))
(defun dap--get-sessions ()
"Get sessions for WORKSPACE."
(lsp-workspace-get-metadata "debug-sessions"))
(defun dap--cur-session ()
"Get currently active `dap--debug-session'."
(lsp-workspace-get-metadata "default-session"))
(defun dap--resp-handler (&optional success-callback error-callback)
"Generate a response handler, for use in `dap--send-message'.
If the request is successful, call SUCCESS-CALLBACK with the
entire resulting messsage.
The handler will call ERROR-CALLBACK with the message or `error'
on failure."
(-lambda ((result &as &hash "success" "message"))
(if success
(when success-callback (funcall success-callback result))
(if error-callback (funcall error-callback message) (error message)))))
(defun dap--session-init-resp-handler (debug-session &optional success-callback)
"Returned handler will mark the DEBUG-SESSION as failed if call return error.
SUCCESS-CALLBACK will be called if it is provided and if the call
has succeeded."
(-lambda ((result &as &hash "success" "message"))
(if success
(when success-callback (funcall success-callback result))
(warn "Initialize request failed: %s" message)
(delete-process (dap--debug-session-proc debug-session))
(setf (dap--debug-session-state debug-session) 'failed
(dap--debug-session-error-message debug-session) message)
(dap--refresh-breakpoints)
(run-hook-with-args 'dap-terminated-hook debug-session)
(run-hooks 'dap-session-changed-hook))))
(defun dap--cur-session-or-die ()
"Get currently selection `dap--debug-session' or die."
(or (dap--cur-session) (error "No active current session")))
(defun dap--session-running (debug-session)
"Check whether DEBUG-SESSION still running."
(and debug-session
(not (memq (dap--debug-session-state debug-session)
'(terminated failed)))))
(defun dap--cur-active-session-or-die ()
"Get currently non-terminated `dap--debug-session' or die."
(-let ((debug-session (dap--cur-session-or-die)))
(if (dap--session-running debug-session)
debug-session
(error "Session %s is terminated" (dap--debug-session-name debug-session)))))
(defun dap-breakpoint-get-point (breakpoint)
"Get position of BREAKPOINT."
(or (-some-> breakpoint (plist-get :marker) marker-position)
(plist-get breakpoint :point)))
(defun dap--set-cur-session (debug-session)
"Change the active debug session to DEBUG-SESSION."
(lsp-workspace-set-metadata "default-session" debug-session))
(defmacro dap--put-if-absent (config key form)
"Update KEY to FORM if KEY does not exist in plist CONFIG."
`(plist-put ,config ,key (or (plist-get ,config ,key) ,form)))
(defun dap--completing-read (prompt collection transform-fn &optional predicate
require-match initial-input
hist def inherit-input-method)
"Wrap `completing-read' to provide tranformation function.
TRANSFORM-FN will be used to transform each of the items before displaying.
PROMPT COLLECTION PREDICATE REQUIRE-MATCH INITIAL-INPUT HIST DEF
INHERIT-INPUT-METHOD will be proxied to `completing-read' without changes."
(let* ((result (--map (cons (funcall transform-fn it) it) collection))
(completion (completing-read prompt (-map 'cl-first result)
predicate require-match initial-input hist
def inherit-input-method)))
(cdr (assoc completion result))))
(defun dap--plist-delete (plist property)
"Delete PROPERTY from PLIST.
This is in contrast to merely setting it to 0."
(let (p)
(while plist
(if (not (eq property (cl-first plist)))
(setq p (plist-put p (cl-first plist) (nth 1 plist))))
(setq plist (cddr plist)))
p))
(defun dap--json-encode (params)
"Create a LSP message from PARAMS, after encoding it to a JSON string."
(let* ((json-encoding-pretty-print dap-print-io)
(json-false :json-false))
(json-encode params)))
(defun dap--make-message (params)
"Create a LSP message from PARAMS, after encoding it to a JSON string."
(let* ((body (dap--json-encode params)))
(format "Content-Length: %d\r\n\r\n%s" (string-bytes body) body)))
(defun dap--parse-header (s)
"Parse string S as a DAP (KEY . VAL) header."
(let ((pos (string-match "\:" s))
key val)
(unless pos
(signal 'lsp-invalid-header-name (list s)))
(setq key (substring s 0 pos)
val (substring s (+ 2 pos)))
(when (string-equal key "Content-Length")
(cl-assert (cl-loop for c being the elements of val
when (or (> c ?9) (< c ?0)) return nil
finally return t)
nil (format "Invalid Content-Length value: %s" val)))
(cons key val)))
(defun dap--get-breakpoints ()
"Get breakpoints in WORKSPACE."
(or (lsp-workspace-get-metadata "Breakpoints")
(let ((breakpoints (make-hash-table :test 'equal)))
(lsp-workspace-set-metadata "Breakpoints" breakpoints)
breakpoints)))
(defun dap--persist (file to-persist)
"Serialize TO-PERSIST to FILE."
(with-demoted-errors
"Failed to persist file: %S"
(make-directory (file-name-directory file) t)
(with-temp-file file
;; Starting with Emacs 29, `prin1' takes an optional third argument
;; which removes the need for these default bindings.
(let ((print-length nil)
(print-level nil))
(prin1 to-persist (current-buffer))))))
(defun dap--set-sessions (debug-sessions)
"Update list of debug sessions for WORKSPACE to DEBUG-SESSIONS."
(lsp-workspace-set-metadata "debug-sessions" debug-sessions)
(run-hook-with-args 'dap-session-changed-hook))
(defun dap--persist-breakpoints (breakpoints)
"Persist BREAKPOINTS."
;; filter markers before persisting the breakpoints (markers are not
;; writeable) and update the point based on the marker.
(let ((filtered-breakpoints (make-hash-table :test 'equal)))
(maphash (lambda (k v)
(puthash k (-map (-lambda ((bkp &as &plist :marker :point))
(-> bkp
(dap--plist-delete :point)
(dap--plist-delete :marker)
(plist-put :point (if marker
(marker-position marker)
point))))
v)
filtered-breakpoints))
breakpoints)
(dap--persist dap-breakpoints-file filtered-breakpoints)))
(defun dap--breakpoints-changed (updated-file-breakpoints &optional file-name)
"Common logic breakpoints related methods UPDATED-FILE-BREAKPOINTS.
FILE-NAME is the filename in which the breakpoints have been udpated."
(let* ((file-name (or file-name buffer-file-name (error "No file name")))
(breakpoints (dap--get-breakpoints)))
;; update the list
(if updated-file-breakpoints
(puthash file-name updated-file-breakpoints breakpoints)
(remhash file-name breakpoints))
;; do not update the breakpoints represenations if there is active session.
(when (not (and (dap--cur-session) (dap--session-running (dap--cur-session))))
(--when-let (find-buffer-visiting file-name)
(with-current-buffer it
(run-hooks 'dap-breakpoints-changed-hook))))
;; Update all of the active sessions with the list of breakpoints.
(mapc (lambda (session)
(let ((set-breakpoints-req (dap--set-breakpoints-request
session
file-name
updated-file-breakpoints)))
(dap--send-message
set-breakpoints-req
(dap--resp-handler
(lambda (resp)
(dap--update-breakpoints session
resp
file-name)))
session)))
(-filter #'dap--session-running (dap--get-sessions)))
(dap--persist-breakpoints breakpoints)))
(defun dap-breakpoint-toggle ()
"Toggle breakpoint on the current line."
(interactive)
(let ((file-breakpoints (gethash buffer-file-name (dap--get-breakpoints))))
(dap--breakpoints-changed
(if-let (existing-breakpoint (dap--get-breakpoint-at-point file-breakpoints))
;; delete if already exists
(progn
(-some-> existing-breakpoint
(plist-get :marker)
(set-marker nil))
(cl-remove existing-breakpoint file-breakpoints))
;; add if does not exist
(push (list :marker (point-marker)
:point (point))
file-breakpoints)))))
(defun dap--get-breakpoint-at-point (&optional file-breakpoints)
"Get breakpoint on the current point.
FILE-BREAKPOINTS is the list of breakpoints in the current file."
(let ((current-line (line-number-at-pos (point))))
(-first
(-lambda (bp)
(= current-line (line-number-at-pos (dap-breakpoint-get-point bp))))
(or file-breakpoints (gethash buffer-file-name (dap--get-breakpoints))))))
(defun dap-breakpoint-delete (breakpoint file-name)
"Delete breakpoint on the current line."
(interactive (list (-some->> (dap--get-breakpoints)
(gethash buffer-file-name)
dap--get-breakpoint-at-point)
buffer-file-name))
(when breakpoint
(-some-> breakpoint (plist-get :marker) (set-marker nil))
(dap--breakpoints-changed (-remove
(-lambda (bp)
(eq (dap-breakpoint-get-point bp)
(dap-breakpoint-get-point breakpoint)))
(gethash file-name (dap--get-breakpoints)))
file-name)))
(defun dap--breakpoint-update (property message file-name existing-breakpoint)
"Common code for updating breakpoint.
MESSAGE to be displayed to the user.
PROPERTY is the breakpoint property that will be udpated."
(let ((file-breakpoints (gethash file-name (dap--get-breakpoints))))
(if existing-breakpoint
(let ((value (read-string message
(plist-get existing-breakpoint property))))
(if (s-blank? value)
(setq file-breakpoints (cons (-> existing-breakpoint
(dap--plist-delete :hit-condition)
(dap--plist-delete :condition)
(dap--plist-delete :log-message))
(delete existing-breakpoint file-breakpoints)))
(plist-put existing-breakpoint property value))
(dap--breakpoints-changed file-breakpoints file-name))
(error "No breakpoint found."))))
(defun dap-breakpoint-condition (file-name breakpoint)
"Set breakpoint condition for the breakpoint at point."
(interactive (list buffer-file-name (dap--get-breakpoint-at-point)))
(dap--breakpoint-update :condition "Enter breakpoint condition: " file-name breakpoint))
(defun dap-breakpoint-hit-condition (file-name breakpoint)
"Set breakpoint hit condition for the breakpoint at point."
(interactive (list buffer-file-name (dap--get-breakpoint-at-point)))
(dap--breakpoint-update :hit-condition "Enter hit condition: " file-name breakpoint))
(defun dap-breakpoint-log-message (file-name breakpoint)
"Set breakpoint log message for the breakpoint at point.
If log message for the breakpoint is specified it won't stop
thread exection but the server will log message."
(interactive (list buffer-file-name (dap--get-breakpoint-at-point)))
(dap--breakpoint-update :log-message "Enter log message: " file-name breakpoint))
(defun dap-breakpoint-add ()
"Add breakpoint on the current line."
(interactive)
(let ((file-breakpoints (gethash buffer-file-name (dap--get-breakpoints))))
(unless (dap--get-breakpoint-at-point file-breakpoints)
(dap--breakpoints-changed (push (list :marker (point-marker)
:point (point))
file-breakpoints)))))
(defun dap--get-body-length (headers)
"Get body length from HEADERS."
(let ((content-length (cdr (assoc "Content-Length" headers))))
(if content-length
(string-to-number content-length)
;; This usually means either the server our our parser is
;; screwed up with a previous Content-Length
(error "No Content-Length header"))))
(defun dap--parser-reset (p)
"Reset `dap--parser' P."
(setf
(dap--parser-leftovers p) ""
(dap--parser-body-length p) nil
(dap--parser-body-received p) nil
(dap--parser-headers p) '()
(dap--parser-body p) nil
(dap--parser-reading-body p) nil))
(defun dap--parser-read (p output)
"Parser OUTPUT using parser P."
(let* ((messages '())
(output (encode-coding-string output 'utf-8 'nocopy))
(chunk (concat (dap--parser-leftovers p) output)))
(while (not (string-empty-p chunk))
(if (not (dap--parser-reading-body p))
;; Read headers
(let* ((body-sep-pos (string-match-p "\r\n\r\n" chunk)))
(if body-sep-pos
;; We've got all the headers, handle them all at once:
(let* ((header-raw (substring chunk 0 body-sep-pos))
(content (substring chunk (+ body-sep-pos 4)))
(headers
(mapcar 'dap--parse-header
(split-string header-raw "\r\n")))
(body-length (dap--get-body-length headers)))
(setf
(dap--parser-headers p) headers
(dap--parser-reading-body p) t
(dap--parser-body-length p) body-length
(dap--parser-body-received p) 0
(dap--parser-body p) (make-string body-length ?\0)
(dap--parser-leftovers p) nil)
(setq chunk content))
;; Haven't found the end of the headers yet. Save everything
;; for when the next chunk arrives and await further input.
(setf (dap--parser-leftovers p) chunk)
(setq chunk "")))
;; Read body
(let* ((total-body-length (dap--parser-body-length p))
(received-body-length (dap--parser-body-received p))
(chunk-length (string-bytes chunk))
(left-to-receive (- total-body-length received-body-length))
(this-body (substring chunk 0 (min left-to-receive chunk-length)))
(leftovers (substring chunk (string-bytes this-body))))
(store-substring (dap--parser-body p) received-body-length this-body)
(setf (dap--parser-body-received p) (+ (dap--parser-body-received p)
(string-bytes this-body)))
(when (>= chunk-length left-to-receive)
(push (decode-coding-string (dap--parser-body p) 'utf-8) messages)
(dap--parser-reset p))
(setq chunk leftovers))))
(nreverse messages)))
(defun dap--read-json (str)
"Read the JSON object contained in STR and return it."
(let* ((json-array-type 'list)
(json-object-type 'hash-table)
(json-false nil))
(json-read-from-string str)))
(defun dap--resume-application (debug-session)
"Resume DEBUG-SESSION."
(-let [thread-id (dap--debug-session-thread-id debug-session)]
(puthash thread-id "running" (dap--debug-session-thread-states debug-session))
(remhash thread-id (dap--debug-session-thread-stack-frames debug-session)))
(setf (dap--debug-session-active-frame debug-session) nil
(dap--debug-session-thread-id debug-session) nil)
(run-hook-with-args 'dap-continue-hook debug-session))
(defun dap-continue (debug-session thread-id)
"Call continue for the currently active session and thread."
(interactive (list (dap--cur-active-session-or-die)
(dap--debug-session-thread-id (dap--cur-active-session-or-die))))
(if thread-id
(progn
(dap--send-message (dap--make-request "continue"
(list :threadId thread-id))
(dap--resp-handler)
debug-session)
(dap--resume-application debug-session))
(lsp--error "Currently active thread is not stopped. Use `dap-switch-thread' or select stopped thread from sessions view.")))
(defun dap-disconnect (session)
"Disconnect from the currently active session."
(interactive (list (dap--cur-active-session-or-die)))
(dap--send-message (dap--make-request "disconnect"
(list :restart :json-false))
(lambda (_result)
(when-let (proc (dap--debug-session-program-proc session))
(lsp--info "Killing process %s" proc)
(kill-process proc)))
session)
(dap--resume-application session))
(defun dap--step (cmd debug-session)
"Send a request for CMD, a step command.
DEBUG-SESSION is the debug session in which the stepping is to be
executed."
(if-let (thread-id (dap--debug-session-thread-id debug-session))
(progn
(dap--send-message (dap--make-request
cmd
(list :threadId thread-id))
(dap--resp-handler)
debug-session)
(dap--resume-application debug-session))
(lsp--error "Currently active thread is not stopped. Use `dap-switch-thread' or select stopped thread from sessions view.")))
(defun dap-next (debug-session)
"Step over statements."
(interactive (list (dap--cur-session-or-die)))
(dap--step "next" debug-session))
(defun dap-step-in (debug-session)
"Like `dap-next', but step into function calls."
(interactive (list (dap--cur-session-or-die)))
(dap--step "stepIn" debug-session))
(defun dap-step-out (debug-session)
"Debug step out."
(interactive (list (dap--cur-session-or-die)))
(dap--step "stepOut" debug-session))
(defun dap-restart-frame (debug-session frame-id)
"Restarts current frame."
(interactive (let ((debug-session (dap--cur-active-session-or-die)))
(list debug-session
(-some->> debug-session dap--debug-session-active-frame (gethash "id")))))
(dap--send-message (dap--make-request "restartFrame"
(list :frameId frame-id))
(dap--resp-handler)
debug-session)
(dap--resume-application debug-session))
(defcustom dap-debug-restart-keep-session t
"Set if `dap-debug-restart' should use a new session.
When running `dap-debug-restart' with this variable set, the old
session will still be visible and accessible after restarting. If
not, the old session will be deleted, `dap-debug-restart'
behaving like an in-place restart instead. Note that you can
override this variable by calling `dap-debug-restart' with a
prefix argument (the effect will be reversed)."
:group 'dap-mode
:type 'boolean)
(defun dap-debug-restart (&optional toggle-keep-session)
"Restarts current frame.
If TOGGLE-KEEP-SESSION is set (in interactive mode this is the
prefix argument), the effect of `dap-debug-restart-keep-session'
will be reversed."
(interactive "P")
(if-let ((debug-session (dap--cur-session)))
(progn
(when (dap--session-running debug-session)
(message "Disconnecting from %s" (dap--debug-session-name debug-session))
(if (eq toggle-keep-session dap-debug-restart-keep-session)
(dap-delete-session debug-session)
(dap-disconnect debug-session)))
(dap-debug (dap--debug-session-launch-args debug-session)))
(user-error "There is session to restart")))
(defun dap--request-source-for-frame-by-reference (debug-session stack-frame line column name)
"Request source string for a STACK-FRAME using the sourceReference."
(-when-let* ((source (gethash "source" stack-frame))
(sourceReference (gethash "sourceReference" source))
(sourceReferenceKey (format "%s-%s" name sourceReference)))
(select-window (get-mru-window (selected-frame) nil))
(if-let* ((existing-buffer (get-buffer sourceReferenceKey)))
(switch-to-buffer existing-buffer)
(dap--send-message
(dap--make-request "source" (list :sourceReference sourceReference))
(dap--resp-handler
(-lambda ((&hash "body" (&hash "content" content)))
(switch-to-buffer (generate-new-buffer sourceReferenceKey))
(insert content)
(goto-char (point-min))
(forward-line (1- line))
(forward-char column))
(lambda (errmsg)
(message "No source code for %s. Cursor at %s:%s. Error: %s." name line column errmsg)))
debug-session))))
(defun dap--get-path-for-frame (debug-session stack-frame)
"Get file path for a STACK-FRAME."
(-when-let* ((source (gethash "source" stack-frame))
(path (gethash "path" source)))
(let ((remote-path (if (-> path url-unhex-string url-generic-parse-url url-type)
(lsp--uri-to-path path)
path)))
(--> debug-session (dap--debug-session-remote-to-local-path-fn it) (funcall it remote-path)))))
(defun dap--go-to-stack-frame (debug-session stack-frame)
"Make STACK-FRAME the active STACK-FRAME of DEBUG-SESSION."
(when stack-frame
(-let* (((&hash "line" line "column" column "name" name) stack-frame)
(path (dap--get-path-for-frame debug-session stack-frame)))
(setf (dap--debug-session-active-frame debug-session) stack-frame)
;; If we have a source file with path attached, open it and
;; position the point in the line/column referenced in the
;; stack trace.
(if (and path (file-exists-p path))
(progn
(select-window (get-mru-window (selected-frame) nil))
(find-file path)
(goto-char (point-min))
(forward-line (1- line))
(forward-char column))
(dap--request-source-for-frame-by-reference debug-session stack-frame line column name))))
(run-hook-with-args 'dap-stack-frame-changed-hook debug-session))
(defun dap--select-thread-id (debug-session thread-id &optional force)
"Make the thread with id=THREAD-ID the active thread for DEBUG-SESSION."
;; make the thread the active session only if there is no active debug
;; session.
(when (or force (not (dap--debug-session-thread-id debug-session)))
(setf (dap--debug-session-thread-id debug-session) thread-id)
(run-hook-with-args 'dap-stopped-hook debug-session))
(dap--send-message
(dap--make-request "stackTrace" (list :threadId thread-id :levels dap-stack-trace-limit))
(dap--resp-handler
(-lambda ((&hash "body" (&hash "stackFrames" stack-frames)))
(puthash thread-id
stack-frames
(dap--debug-session-thread-stack-frames debug-session))
;; select stackframe only when session matches the active session and when
;; thread-id is the same as the active one
(when (and (eq debug-session (dap--cur-session))
(eq thread-id (dap--debug-session-thread-id (dap--cur-session))))
;; filter stack frames excluding those associated to non-existing paths
;; fall back to original stack-frames if none found
(-when-let (stack-frames
(or (-filter (lambda(stack-frame)
(-when-let (path (dap--get-path-for-frame debug-session stack-frame))
(file-exists-p path)))
stack-frames)
stack-frames))
(dap--go-to-stack-frame debug-session (cl-first stack-frames))))))
debug-session))
(defun dap--buffer-list ()
"Get all file backed buffers."
(-filter 'buffer-file-name (buffer-list)))
(defun dap--buffers-w-breakpoints ()
"Get only the buffers featuring at least one breakpoint"
;; extract the list of buffers featuring a breakpoint from their first breakpoint marker
;; (as stored in the LSP metadata)
(--map (marker-buffer (plist-get (car it) :marker))
(ht-values (dap--get-breakpoints))))
(defun dap--refresh-breakpoints ()
"Refresh breakpoints for DEBUG-SESSION."
(--each (dap--buffers-w-breakpoints)
(when (buffer-live-p it)
(with-current-buffer it
(dap--set-breakpoints-in-file
buffer-file-name
(gethash buffer-file-name (dap--get-breakpoints)))))))
(defun dap--mark-session-as-terminated (debug-session)
"Mark DEBUG-SESSION as terminated."
(setf (dap--debug-session-state debug-session) 'terminated
(dap--debug-session-active-frame debug-session) nil)
(with-demoted-errors "Process cleanup failed with %s"
(delete-process (dap--debug-session-proc debug-session)))
(clrhash (dap--debug-session-breakpoints debug-session))
(run-hook-with-args 'dap-stack-frame-changed-hook debug-session)
(run-hook-with-args 'dap-terminated-hook debug-session)
(dap--refresh-breakpoints)
(when-let ((cleanup-fn (plist-get
(dap--debug-session-launch-args debug-session)
:cleanup-function)))
(funcall cleanup-fn debug-session)))
(defun dap--output-buffer-format-with-category (category output)
"Formats a string suitable for printing to the output buffer using
CATEGORY and OUTPUT."
(let ((message (format "%s: %s" category output)))
(if (string= (substring message -1) "\n")
message
(concat message "\n"))))
(defun dap--output-buffer-format (output-body)
"Formats a string suitable for printing to the output buffer using
an OUTPUT-BODY."
(if dap-label-output-buffer-category
(dap--output-buffer-format-with-category (gethash "category" output-body)
(gethash "output" output-body))
(gethash "output" output-body)))
(defun dap--insert-at-point-max (str)
"Inserts STR at point-max of the buffer."
(goto-char (point-max))
(insert (ansi-color-apply str)))
(defun dap--print-to-output-buffer (debug-session str)
"Insert content from STR into the output buffer associated with DEBUG-SESSION."
(with-current-buffer (get-buffer-create (dap--debug-session-output-buffer debug-session))
(turn-on-font-lock)
(let ((inhibit-read-only t))
(if (and (eq (current-buffer) (window-buffer))
(not (eobp)))
(save-excursion
(dap--insert-at-point-max str))
(dap--insert-at-point-max str))))
(when (and dap-auto-show-output
(not (dap--debug-session-output-displayed debug-session)))
(setf (dap--debug-session-output-displayed debug-session) t)
(save-excursion (dap-go-to-output-buffer t))))
(cl-defgeneric dap-handle-event (event-type session params)
"Extension point for handling custom events.
EVENT-TYPE is the event to handle.
SESSION is the session that has triggered the event.
PARAMS are the event params.")
(cl-defmethod dap-handle-event (event-type _session _params)
(message "No message handler for %s" event-type))
(defun dap--on-event (debug-session event)
"Dispatch EVENT for DEBUG-SESSION."
(-let [(&hash "body" "event" event-type) event]
(pcase event-type
("output" (-when-let* ((formatted-output (dap--output-buffer-format body))
(formatted-output (if-let ((output-filter-fn (-> debug-session
(dap--debug-session-launch-args)
(plist-get :output-filter-function))))
(funcall output-filter-fn formatted-output)
formatted-output)))
(when (or (not dap-output-buffer-filter) (member (gethash "category" body)
dap-output-buffer-filter))
(dap--print-to-output-buffer debug-session formatted-output))))
("breakpoint" (-when-let* (((breakpoint &as &hash "id") (when body
(gethash "breakpoint" body)))
(file-name (->> debug-session
(dap--debug-session-breakpoints)
(ht-find
(lambda (_ breakpoints)
(-first (-lambda ((bkp &as &hash "id" bkp-id))
(when (eq bkp-id id)
(ht-clear bkp)
(ht-aeach (ht-set bkp key value) breakpoint)
t))
breakpoints)))
(cl-first))))
(when (eq debug-session (dap--cur-session))
(when-let (buffer (find-buffer-visiting file-name))
(with-current-buffer buffer
(run-hooks 'dap-breakpoints-changed-hook))))))
("thread" (-let [(&hash "threadId" id "reason") body]
(puthash id reason (dap--debug-session-thread-states debug-session))
(run-hooks 'dap-session-changed-hook)
(dap--send-message
(dap--make-request "threads")
(-lambda ((&hash "body"))
(setf (dap--debug-session-threads debug-session)
(when body (gethash "threads" body)))
(run-hooks 'dap-session-changed-hook))
debug-session)))
("exited" (dap--mark-session-as-terminated debug-session))
("continued"
(-let [(&hash "threadId" thread-id) body]
(remhash thread-id (dap--debug-session-thread-states debug-session))
(if (and (equal thread-id (dap--debug-session-thread-id debug-session))
(equal debug-session (dap--cur-session)))
(dap--resume-application debug-session)
(run-hooks 'dap-session-changed-hook))))
("stopped"
(-let [(&hash "threadId" thread-id "type" "reason") body]
(puthash thread-id (or type reason)
(dap--debug-session-thread-states debug-session))
(dap--select-thread-id debug-session thread-id)
(when (and (string= "exception" reason)
(gethash "supportsExceptionInfoRequest" (dap--debug-session-current-capabilities debug-session)))
(dap--send-message
(dap--make-request "exceptionInfo" (list :threadId thread-id))