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view graal/com.oracle.truffle.sl.tools/src/com/oracle/truffle/sl/tools/debug/SLREPLServer.java @ 21933:2a7f8723d5b2
Unit tests for counted loop detection.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Fri, 12 Jun 2015 11:32:39 +0200 |
parents | 894f82515e38 |
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/* * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.truffle.sl.tools.debug; import java.util.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.instrument.*; import com.oracle.truffle.api.nodes.*; import com.oracle.truffle.api.source.*; import com.oracle.truffle.api.vm.*; import com.oracle.truffle.api.vm.TruffleVM.Language; import com.oracle.truffle.tools.debug.engine.*; import com.oracle.truffle.tools.debug.shell.*; import com.oracle.truffle.tools.debug.shell.client.*; import com.oracle.truffle.tools.debug.shell.server.*; /** * Instantiation of the "server" side of the "REPL*" debugger for the Simple language. * <p> * The SL parser is not equipped to parse program fragments, so any debugging functions that depend * on this are not supported, for example {@link DebugEngine#eval(Source, Node, MaterializedFrame)} * and {@link Breakpoint#setCondition(String)}. * * @see SimpleREPLClient */ public final class SLREPLServer implements REPLServer { public static void main(String[] args) { // Cheating for the prototype: start from SL, rather than from the client. final SLREPLServer server = new SLREPLServer(); final SimpleREPLClient client = new SimpleREPLClient(server.language.getShortName(), server); // Cheating for the prototype: allow server access to client for recursive debugging server.setClient(client); try { client.start(); } catch (QuitException ex) { } } private final Language language; private final DebugEngine slDebugEngine; private final String statusPrefix; private final Map<String, REPLHandler> handlerMap = new HashMap<>(); private SLServerContext currentServerContext; private SimpleREPLClient replClient = null; private void add(REPLHandler fileHandler) { handlerMap.put(fileHandler.getOp(), fileHandler); } public SLREPLServer() { add(REPLHandler.BACKTRACE_HANDLER); add(REPLHandler.BREAK_AT_LINE_HANDLER); add(REPLHandler.BREAK_AT_LINE_ONCE_HANDLER); add(REPLHandler.BREAK_AT_THROW_HANDLER); add(REPLHandler.BREAK_AT_THROW_ONCE_HANDLER); add(REPLHandler.BREAKPOINT_INFO_HANDLER); add(REPLHandler.CLEAR_BREAK_HANDLER); add(REPLHandler.CONTINUE_HANDLER); add(REPLHandler.DELETE_HANDLER); add(REPLHandler.DISABLE_BREAK_HANDLER); add(REPLHandler.ENABLE_BREAK_HANDLER); add(REPLHandler.FILE_HANDLER); add(REPLHandler.FRAME_HANDLER); add(SLREPLHandler.INFO_HANDLER); add(REPLHandler.KILL_HANDLER); add(SLREPLHandler.LOAD_RUN_SOURCE_HANDLER); add(SLREPLHandler.LOAD_STEP_SOURCE_HANDLER); add(REPLHandler.QUIT_HANDLER); add(REPLHandler.STEP_INTO_HANDLER); add(REPLHandler.STEP_OUT_HANDLER); add(REPLHandler.STEP_OVER_HANDLER); add(REPLHandler.TRUFFLE_HANDLER); add(REPLHandler.TRUFFLE_NODE_HANDLER); TruffleVM vm = TruffleVM.newVM().build(); this.language = vm.getLanguages().get("application/x-sl"); assert language != null; final SLREPLDebugClient slDebugClient = new SLREPLDebugClient(language); this.slDebugEngine = DebugEngine.create(slDebugClient, language); this.statusPrefix = language.getShortName() + " REPL:"; } private void setClient(SimpleREPLClient replClient) { this.replClient = replClient; } public REPLMessage start() { this.currentServerContext = new SLServerContext(null, null, null); // SL doesn't load modules (like other languages), so we just return a success final REPLMessage reply = new REPLMessage(); reply.put(REPLMessage.STATUS, REPLMessage.SUCCEEDED); reply.put(REPLMessage.DISPLAY_MSG, language.getShortName() + " started"); return reply; } public REPLMessage[] receive(REPLMessage request) { if (currentServerContext == null) { final REPLMessage message = new REPLMessage(); message.put(REPLMessage.STATUS, REPLMessage.FAILED); message.put(REPLMessage.DISPLAY_MSG, "server not started"); final REPLMessage[] reply = new REPLMessage[]{message}; return reply; } return currentServerContext.receive(request); } /** * Execution context of a halted SL program. */ public final class SLServerContext extends REPLServerContext { private final SLServerContext predecessor; public SLServerContext(SLServerContext predecessor, Node astNode, MaterializedFrame mFrame) { super(predecessor == null ? 0 : predecessor.getLevel() + 1, astNode, mFrame); this.predecessor = predecessor; } @Override public REPLMessage[] receive(REPLMessage request) { final String command = request.get(REPLMessage.OP); final REPLHandler handler = handlerMap.get(command); if (handler == null) { final REPLMessage message = new REPLMessage(); message.put(REPLMessage.OP, command); message.put(REPLMessage.STATUS, REPLMessage.FAILED); message.put(REPLMessage.DISPLAY_MSG, statusPrefix + " op \"" + command + "\" not supported"); final REPLMessage[] reply = new REPLMessage[]{message}; return reply; } return handler.receive(request, currentServerContext); } @Override public Language getLanguage() { return language; } @Override public DebugEngine getDebugEngine() { return slDebugEngine; } } /** * Specialize the standard SL debug context by notifying the REPL client when execution is * halted, e.g. at a breakpoint. * <p> * Before notification, the server creates a new context at the halted location, in which * subsequent evaluations take place until such time as the client says to "continue". * <p> * This implementation "cheats" the intended asynchronous architecture by calling back directly * to the client with the notification. */ private final class SLREPLDebugClient implements DebugClient { private final Language language; SLREPLDebugClient(Language language) { this.language = language; } public void haltedAt(Node node, MaterializedFrame mFrame, List<String> warnings) { // Create and push a new debug context where execution is halted currentServerContext = new SLServerContext(currentServerContext, node, mFrame); // Message the client that execution is halted and is in a new debugging context final REPLMessage message = new REPLMessage(); message.put(REPLMessage.OP, REPLMessage.STOPPED); final SourceSection src = node.getSourceSection(); final Source source = src.getSource(); message.put(REPLMessage.SOURCE_NAME, source.getName()); message.put(REPLMessage.FILE_PATH, source.getPath()); message.put(REPLMessage.LINE_NUMBER, Integer.toString(src.getStartLine())); message.put(REPLMessage.STATUS, REPLMessage.SUCCEEDED); message.put(REPLMessage.DEBUG_LEVEL, Integer.toString(currentServerContext.getLevel())); if (!warnings.isEmpty()) { final StringBuilder sb = new StringBuilder(); for (String warning : warnings) { sb.append(warning + "\n"); } message.put(REPLMessage.WARNINGS, sb.toString()); } try { // Cheat with synchrony: call client directly about entering a nested debugging // context. replClient.halted(message); } finally { // Returns when "continue" is called in the new debugging context // Pop the debug context, and return so that the old context will continue currentServerContext = currentServerContext.predecessor; } } public Language getLanguage() { return language; } } }