Implemented initial DAP support

Implemented "output" event

Refactored "seq" field generation

Prevent debugging when editor and client are in different projects

Removed unneeded references to peer on the parser

Refactored way to detect project path

Implemented "setBreakpoints" request

Fix double events when terminating from client

Refactored "stopped" event

Implemented "stopped" with breakpoint event

Implemented "stackTrace", "scopes" and "variables" request

Report incoming number of stack dump variables

Implemented proper reporting of scopes and variables from stack frames

Prevent editor from grabbing focus when a DAP session is active

Implemented "next" and "stepIn" requests

Implemented "Source" checksum computing

Switched expected errors from macros to silent guards

Refactored message_id

Respect client settings regarding lines/columns behavior

Refactored nested DAP fields

Implement reporting of "Members" and "Globals" scopes as well

Fix error messages not being shown, and improved wrong path message

1 files changed, 102 insertions, 0 deletions

diff --git a/editor/debugger/debug_adapter/debug_adapter_server.cpp b/editor/debugger/debug_adapter/debug_adapter_server.cpp
new file mode 100644
index 0000000000..f9092a1791
--- /dev/null
+++ b/editor/debugger/debug_adapter/debug_adapter_server.cpp
@@ -0,0 +1,102 @@
+/*************************************************************************/
+/*  debug_adapter_server.cpp                                             */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#include "debug_adapter_server.h"
+
+#include "core/os/os.h"
+#include "editor/editor_log.h"
+#include "editor/editor_node.h"
+
+DebugAdapterServer::DebugAdapterServer() {
+	_EDITOR_DEF("network/debug_adapter/remote_port", remote_port);
+	_EDITOR_DEF("network/debug_adapter/use_thread", use_thread);
+}
+
+void DebugAdapterServer::_notification(int p_what) {
+	switch (p_what) {
+		case NOTIFICATION_ENTER_TREE:
+			start();
+			break;
+		case NOTIFICATION_EXIT_TREE:
+			stop();
+			break;
+		case NOTIFICATION_INTERNAL_PROCESS: {
+			// The main loop can be run again during request processing, which modifies internal state of the protocol.
+			// Thus, "polling" is needed to prevent it from parsing other requests while the current one isn't finished.
+			if (started && !use_thread && !polling) {
+				polling = true;
+				protocol.poll();
+				polling = false;
+			}
+		} break;
+		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
+			int remote_port = (int)_EDITOR_GET("network/debug_adapter/remote_port");
+			bool use_thread = (bool)_EDITOR_GET("network/debug_adapter/use_thread");
+			if (remote_port != this->remote_port || use_thread != this->use_thread) {
+				this->stop();
+				this->start();
+			}
+		} break;
+	}
+}
+
+void DebugAdapterServer::thread_func(void *p_userdata) {
+	DebugAdapterServer *self = static_cast<DebugAdapterServer *>(p_userdata);
+	while (self->thread_running) {
+		// Poll 20 times per second
+		self->protocol.poll();
+		OS::get_singleton()->delay_usec(50000);
+	}
+}
+
+void DebugAdapterServer::start() {
+	remote_port = (int)_EDITOR_GET("network/debug_adapter/remote_port");
+	use_thread = (bool)_EDITOR_GET("network/debug_adapter/use_thread");
+	if (protocol.start(remote_port, IPAddress("127.0.0.1")) == OK) {
+		EditorNode::get_log()->add_message("--- Debug adapter server started ---", EditorLog::MSG_TYPE_EDITOR);
+		if (use_thread) {
+			thread_running = true;
+			thread.start(DebugAdapterServer::thread_func, this);
+		}
+		set_process_internal(!use_thread);
+		started = true;
+	}
+}
+
+void DebugAdapterServer::stop() {
+	if (use_thread) {
+		ERR_FAIL_COND(!thread.is_started());
+		thread_running = false;
+		thread.wait_to_finish();
+	}
+	protocol.stop();
+	started = false;
+	EditorNode::get_log()->add_message("--- Debug adapter server stopped ---", EditorLog::MSG_TYPE_EDITOR);
+}