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Server.hx
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package hxcpp.debug.jsonrpc;
import hxcpp.debug.jsonrpc.VariablesPrinter;
import hxcpp.debug.jsonrpc.Protocol;
import cpp.vm.Thread;
import cpp.vm.Mutex;
import cpp.vm.Debugger;
import cpp.vm.Deque;
import hxcpp.debug.jsonrpc.eval.Parser;
import hxcpp.debug.jsonrpc.eval.Interp;
import hxcpp.debug.jsonrpc.eval.Expr;
@:enum abstract ScopeId(String) to String {
var members = "Members";
var locals = "Locals";
}
typedef BreakpointInfo = {
var id:Int;
var line:Int;
@:optional var column:Int;
@:optional var condition:Expr;
}
private class References {
static var lastId:Int = 1000;
var references:Map<Int, Value>;
public function new() {
references = new Map<Int, Value>();
}
public function create(ref:Value):Int {
var id = lastId;
references[lastId] = ref;
lastId++;
return id;
}
public function get(id:Int):Value {
return references[id];
}
public function clear() {
references = new Map<Int, Value>();
}
}
@:keep
class Server {
var host:String;
var port:Int;
var listening:sys.net.Socket;
var socket:sys.net.Socket;
var stateMutex:Mutex;
var socketMutex:Mutex;
var currentThreadInfo:cpp.vm.ThreadInfo;
var scopes:Map<ScopeId, Array<String>>;
var threads:Map<Int, String>;
var breakpoints:Map<String, Array<BreakpointInfo>>;
var references:References;
var started:Bool;
var path2file:Map<String, String>;
var file2path:Map<String, String>;
var mainThread:Thread;
var interp:Interp;
var parser:Parser;
static var startQueue:Deque<Bool> = new Deque<Bool>();
@:keep static var inst = {
var host:String = Macro.getDefinedValue("HXCPP_DEBUG_HOST", "127.0.0.1");
var port:Int = Std.parseInt(Macro.getDefinedValue("HXCPP_DEBUG_PORT", "6972"));
new Server(host, port);
}
public function new(host:String, port:Int) {
trace('Debug Server Started:');
this.host = host;
this.port = port;
stateMutex = new Mutex();
socketMutex = new Mutex();
scopes = new Map<ScopeId, Array<String>>();
breakpoints = new Map<String, Array<BreakpointInfo>>();
references = new References();
threads = new Map<Int, String>();
path2file = new Map<String, String>();
file2path = new Map<String, String>();
mainThread = Thread.current();
parser = new Parser();
Debugger.enableCurrentThreadDebugging(false);
if (connect()) {
Thread.create(debuggerThreadMain);
startQueue.pop(true);
Debugger.enableCurrentThreadDebugging(true);
} else {
waitForAttach();
}
}
private function connect():Bool {
var socket:sys.net.Socket = new sys.net.Socket();
socket.input.bigEndian = false;
socket.output.bigEndian = false;
try {
var host = new sys.net.Host(host);
if (host.ip == 0) {
throw "Name lookup error.";
}
socket.connect(host, port);
log('Connected to vsc debugger server at $host:$port');
this.socket = socket;
return true;
} catch (e:Dynamic) {
log('Failed to connect to vsc debugger server at $host:$port');
}
closeSocket();
return false;
}
function waitForAttach() {
var onMainThread = new haxe.Timer(500);
onMainThread.run = function() {
var callOnMainThread:Void->Void = Thread.readMessage(false);
if (callOnMainThread == null)
return;
callOnMainThread();
}
Thread.create(createListeningSocket);
}
function createListeningSocket() {
if (listening == null) {
var socket:sys.net.Socket = new sys.net.Socket();
socket.bind(new sys.net.Host("localhost"), 6972);
socket.listen(1);
listening = socket;
}
while (true) {
var connectedSocket = listening.accept();
mainThread.sendMessage(function() {
if (this.socket == null) {
this.socket = connectedSocket;
onDebuggerAttached();
}
});
}
}
function onDebuggerAttached() {
Debugger.enableCurrentThreadDebugging(false);
Thread.create(debuggerThreadMain);
startQueue.pop(true);
Debugger.enableCurrentThreadDebugging(true);
}
function onDebuggerDetached() {
closeSocket();
Debugger.setEventNotificationHandler(function(_, _, _, _, _, _, _) {});
stateMutex.acquire();
if (currentThreadInfo != null) {
var threadId:Int = currentThreadInfo.number;
currentThreadInfo = null;
Debugger.continueThreads(threadId, 1);
mainThread.sendMessage(function() {
Debugger.enableCurrentThreadDebugging(false);
});
}
stateMutex.release();
}
private function debuggerThreadMain() {
Debugger.setEventNotificationHandler(handleThreadEvent);
Debugger.enableCurrentThreadDebugging(false);
Debugger.breakNow(true);
var fullPathes = Debugger.getFilesFullPath();
var files = Debugger.getFiles();
for (i in 0...files.length) {
var file = files[i];
var path = fullPathes[i];
path2file[path.toUpperCase()] = file;
file2path[file.toUpperCase()] = path;
}
startQueue.push(true);
while (true) {
var m = try {
readMessage();
} catch (e:Dynamic) {
onDebuggerDetached();
return;
}
try {
processMessage(m);
} catch (e:Dynamic) {
m.error = {code: ErrorCode.internal, message: Std.string(e)};
}
try {
sendResponse(m);
} catch (e:Dynamic) {
onDebuggerDetached();
return;
}
}
}
private function readMessage():Message {
if (socket == null)
return null;
var length:Int = socket.input.readInt32();
// trace('Message Length: $length');
var rawString = socket.input.readString(length);
return haxe.Json.parse(rawString);
}
private function sendResponse(m:Message) {
if (socket == null)
return;
socketMutex.acquire();
var serialized:String = haxe.Json.stringify(m);
socket.output.writeInt32(serialized.length);
socket.output.writeString(serialized);
// trace('sendResponse: ${m.id} ${m.method}');
socketMutex.release();
}
private function processMessage(m:Message) {
switch (m.method) {
case Protocol.SetBreakpoints:
var params:SetBreakpointsParams = m.params;
var result = [];
if (!breakpoints.exists(params.file))
breakpoints[params.file] = [];
for (rm in breakpoints[params.file]) {
Debugger.deleteBreakpoint(rm.id);
}
for (b in params.breakpoints) {
var bInfo:BreakpointInfo = {id: 0, line: b.line};
if (b.condition != null) {
try {
var ast:Expr = parser.parseString(b.condition);
bInfo.condition = ast;
} catch (e:Dynamic) {
m.error = {code: ErrorCode.wrongRequest, message: "can't parse condition"};
continue;
}
}
bInfo.id = Debugger.addFileLineBreakpoint(path2file[params.file.toUpperCase()], bInfo.line);
result.push(bInfo);
}
breakpoints[params.file] = result;
m.result = [for (b in result) b.id];
case Protocol.Pause:
Debugger.breakNow(true);
case Protocol.Continue:
Debugger.continueThreads(m.params.threadId, 1);
case Protocol.Threads:
stateMutex.acquire();
m.result = [
for (tid in threads.keys())
{id: tid, name: threads[tid]}
];
stateMutex.release();
case Protocol.GetScopes:
m.result = [];
stateMutex.acquire();
if (currentThreadInfo != null) {
var threadId:Int = currentThreadInfo.number;
var frameId:Int = m.params.frameId;
var stackVariables:Array<String> = Debugger.getStackVariables(threadId, frameId, false);
var localsId = 0;
var localsNames:Array<String> = [];
var localsVals:Array<Dynamic> = [];
for (varName in stackVariables) {
if (varName == "this") {
var value:Dynamic = Debugger.getStackVariableValue(threadId, frameId, "this", false);
var id = references.create(VariablesPrinter.resolveValue(value));
m.result.push({id: id, name: ScopeId.members});
} else {
if (localsId == 0) {
localsId = references.create(NameValueList(localsNames, localsVals));
m.result.push({id: localsId, name: ScopeId.locals});
}
localsNames.push(varName);
localsVals.push(Debugger.getStackVariableValue(threadId, frameId, varName, false));
}
}
}
stateMutex.release();
case Protocol.GetVariables:
m.result = [];
stateMutex.acquire();
if (currentThreadInfo != null) {
var refId = m.params.variablesReference;
var value:Value = references.get(refId);
var vars = VariablesPrinter.getInnerVariables(value, m.params.start, m.params.count);
for (v in vars) {
var varInfo:VarInfo = {
name: v.name,
type: v.type,
value: "",
variablesReference: 0,
}
switch (v.value) {
case NameValueList(names, values):
throw "impossible";
case IntIndexed(value, length, _):
var refId = references.create(v.value);
varInfo.variablesReference = refId;
varInfo.indexedVariables = length;
varInfo.value = Std.string(value);
case StringIndexed(value, printedValue, names, _):
var refId = references.create(v.value);
varInfo.variablesReference = refId;
varInfo.namedVariables = names.length;
varInfo.value = printedValue;
case Single(value):
varInfo.value = value;
}
m.result.push(varInfo);
}
}
stateMutex.release();
case Protocol.SetVariable if (currentThreadInfo != null):
stateMutex.acquire();
var name = m.params.expr;
var value:String = m.params.value;
var stringPattern = ~/"(.*?)"/;
if (stringPattern.match(value)) {
value = stringPattern.matched(1);
}
var frameId = currentThreadInfo.stack.length - 3; // top of stack, minus cpp.vm.Debugger and jsonrpc.Server frames
var result = Debugger.setStackVariableValue(currentThreadInfo.number, frameId, name, value, false);
m.result = {
value: switch (VariablesPrinter.resolveValue(result)) {
case Single(val): val;
case _: Std.string(result);
}
};
stateMutex.release();
case Protocol.Completions if (currentThreadInfo != null):
stateMutex.acquire();
var frameId = getTopFrame();
var completions:Array<CompletionItem> = [];
var variables = Debugger.getStackVariables(currentThreadInfo.number, frameId, false);
for (variable in variables) {
completions.push({label: variable});
}
// TODO: this can cause a "critical error in debugger thread" for some reason?
/*if (variables.indexOf("this") != -1) {
var thisReference = Debugger.getStackVariableValue(currentThreadInfo.number, frameId, "this", false);
for (field in Type.getInstanceFields(thisReference)) {
completions.push({label: field});
}
}*/
m.result = completions;
stateMutex.release();
case Protocol.Evaluate:
var expr = m.params.expr;
m.result = {
name: expr,
value: "",
type: "",
variablesReference: 0
};
stateMutex.acquire();
if (currentThreadInfo != null) {
var threadId = currentThreadInfo.number;
var frameId = m.params.frameId;
var v = VariablesPrinter.evaluate(parser, expr, threadId, frameId);
if (v != null) {
m.result.type = v.type;
switch (v.value) {
case NameValueList(names, values):
throw "impossible";
case IntIndexed(value, length, _):
var refId = references.create(v.value);
m.result.variablesReference = refId;
m.result.indexedVariables = length;
m.result.value = Std.string(value);
case StringIndexed(value, printedValue, names, _):
var refId = references.create(v.value);
m.result.variablesReference = refId;
m.result.namedVariables = names.length;
m.result.value = printedValue;
case Single(value):
m.result.value = value;
}
}
}
stateMutex.release();
case Protocol.StackTrace:
m.result = [];
stateMutex.acquire();
if (currentThreadInfo != null) {
var i = 0;
for (s in currentThreadInfo.stack) {
if (s.fileName == "hxcpp/debug/jsonrpc/Server.hx")
break;
m.result.unshift({
id: i++,
name: '${s.className}.${s.functionName}',
source: file2path[s.fileName.toUpperCase()],
line: s.lineNumber,
column: 0,
artificial: false
});
}
}
stateMutex.release();
case Protocol.Next:
Debugger.stepThread(0, Debugger.STEP_OVER, 1);
case Protocol.StepIn:
Debugger.stepThread(0, Debugger.STEP_INTO, 1);
case Protocol.StepOut:
Debugger.stepThread(0, Debugger.STEP_OUT, 1);
}
}
private function sendEvent<T>(event:NotificationMethod<T>, ?params:T) {
var m = {
method: event,
params: params
};
sendResponse(m);
}
function handleThreadEvent(threadNumber:Int, event:Int, stackFrame:Int, className:String, functionName:String, fileName:String, lineNumber:Int) {
// if (!started) return;
switch (event) {
case Debugger.THREAD_TERMINATED:
stateMutex.acquire();
threads.remove(threadNumber);
if (currentThreadInfo != null && threadNumber == currentThreadInfo.number) {
currentThreadInfo = null;
}
stateMutex.release();
sendEvent(Protocol.ThreadExit, {threadId: threadNumber});
case Debugger.THREAD_CREATED | Debugger.THREAD_STARTED:
stateMutex.acquire();
threads.set(threadNumber, 'Thread${threadNumber}');
if (currentThreadInfo != null && threadNumber == currentThreadInfo.number) {
currentThreadInfo = null;
}
stateMutex.release();
sendEvent(Protocol.ThreadStart, {threadId: threadNumber});
case Debugger.THREAD_STOPPED:
stateMutex.acquire();
currentThreadInfo = Debugger.getThreadInfo(threadNumber, false);
references.clear();
stateMutex.release();
if (currentThreadInfo.status == cpp.vm.ThreadInfo.STATUS_STOPPED_BREAK_IMMEDIATE) {
sendEvent(Protocol.PauseStop, {threadId: threadNumber});
} else if (currentThreadInfo.status == cpp.vm.ThreadInfo.STATUS_STOPPED_BREAKPOINT) {
var bId = currentThreadInfo.breakpoint;
var path = file2path[fileName.toUpperCase()];
var thisFileBreakpoints = breakpoints[path];
for (b in thisFileBreakpoints) {
if (b.id != bId)
continue;
interp = VariablesPrinter.initInterp(threadNumber, getTopFrame(), true);
if (b.condition != null) {
if (!isConditionPass(b.condition)) {
Debugger.continueThreads(threadNumber, 1);
return;
}
}
}
sendEvent(Protocol.BreakpointStop, {threadId: threadNumber});
} else {
sendEvent(Protocol.ExceptionStop, {text: currentThreadInfo.criticalErrorDescription});
}
// ThreadStopped(threadNumber, stackFrame, className,
// functionName, fileName, lineNumber));
}
}
function isConditionPass(condition:Expr):Bool {
try {
var evalRes:Bool = interp.execute(condition);
return evalRes;
} catch (e:Dynamic) {}
return false;
}
function getTopFrame():Int {
// top of stack, minus cpp.vm.Debugger and jsonrpc.Server frames
return (currentThreadInfo != null) ? currentThreadInfo.stack.length - 3 : -1;
}
function closeSocket() {
if (socket != null) {
socket.close();
socket = null;
}
}
public static function log(message:String) {
trace(message);
}
}