| /* |
| * Copyright (c) 1998, 2008, 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. |
| */ |
| |
| /* |
| * This source code is provided to illustrate the usage of a given feature |
| * or technique and has been deliberately simplified. Additional steps |
| * required for a production-quality application, such as security checks, |
| * input validation and proper error handling, might not be present in |
| * this sample code. |
| */ |
| |
| |
| package com.sun.tools.example.debug.tty; |
| |
| import com.sun.jdi.*; |
| import com.sun.jdi.request.EventRequest; |
| import com.sun.jdi.request.ExceptionRequest; |
| import com.sun.jdi.request.ClassPrepareRequest; |
| import com.sun.jdi.event.ClassPrepareEvent; |
| import java.util.ArrayList; |
| |
| abstract class EventRequestSpec { |
| |
| final ReferenceTypeSpec refSpec; |
| |
| int suspendPolicy = EventRequest.SUSPEND_ALL; |
| |
| EventRequest resolved = null; |
| ClassPrepareRequest prepareRequest = null; |
| |
| EventRequestSpec(ReferenceTypeSpec refSpec) { |
| this.refSpec = refSpec; |
| } |
| |
| /** |
| * The 'refType' is known to match, return the EventRequest. |
| */ |
| abstract EventRequest resolveEventRequest(ReferenceType refType) |
| throws Exception; |
| |
| /** |
| * @return If this EventRequestSpec matches the 'refType' |
| * return the cooresponding EventRequest. Otherwise |
| * return null. |
| */ |
| synchronized EventRequest resolve(ClassPrepareEvent event) throws Exception { |
| if ((resolved == null) && |
| (prepareRequest != null) && |
| prepareRequest.equals(event.request())) { |
| |
| resolved = resolveEventRequest(event.referenceType()); |
| prepareRequest.disable(); |
| Env.vm().eventRequestManager().deleteEventRequest(prepareRequest); |
| prepareRequest = null; |
| |
| if (refSpec instanceof PatternReferenceTypeSpec) { |
| PatternReferenceTypeSpec prs = (PatternReferenceTypeSpec)refSpec; |
| if (! prs.isUnique()){ |
| /* |
| * Class pattern event requests are never |
| * considered "resolved", since future class loads |
| * might also match. |
| * Create and enable a new ClassPrepareRequest to |
| * keep trying to resolve. |
| */ |
| resolved = null; |
| prepareRequest = refSpec.createPrepareRequest(); |
| prepareRequest.enable(); |
| } |
| } |
| } |
| return resolved; |
| } |
| |
| synchronized void remove() { |
| if (isResolved()) { |
| Env.vm().eventRequestManager().deleteEventRequest(resolved()); |
| } |
| if (refSpec instanceof PatternReferenceTypeSpec) { |
| PatternReferenceTypeSpec prs = (PatternReferenceTypeSpec)refSpec; |
| if (! prs.isUnique()){ |
| /* |
| * This is a class pattern. Track down and delete |
| * all EventRequests matching this spec. |
| * Note: Class patterns apply only to ExceptionRequests, |
| * so that is all we need to examine. |
| */ |
| ArrayList<ExceptionRequest> deleteList = new ArrayList<ExceptionRequest>(); |
| for (ExceptionRequest er : |
| Env.vm().eventRequestManager().exceptionRequests()) { |
| if (prs.matches(er.exception())) { |
| deleteList.add (er); |
| } |
| } |
| Env.vm().eventRequestManager().deleteEventRequests(deleteList); |
| } |
| } |
| } |
| |
| private EventRequest resolveAgainstPreparedClasses() throws Exception { |
| for (ReferenceType refType : Env.vm().allClasses()) { |
| if (refType.isPrepared() && refSpec.matches(refType)) { |
| resolved = resolveEventRequest(refType); |
| } |
| } |
| return resolved; |
| } |
| |
| synchronized EventRequest resolveEagerly() throws Exception { |
| try { |
| if (resolved == null) { |
| /* |
| * Not resolved. Schedule a prepare request so we |
| * can resolve later. |
| */ |
| prepareRequest = refSpec.createPrepareRequest(); |
| prepareRequest.enable(); |
| |
| // Try to resolve in case the class is already loaded. |
| resolveAgainstPreparedClasses(); |
| if (resolved != null) { |
| prepareRequest.disable(); |
| Env.vm().eventRequestManager().deleteEventRequest(prepareRequest); |
| prepareRequest = null; |
| } |
| } |
| if (refSpec instanceof PatternReferenceTypeSpec) { |
| PatternReferenceTypeSpec prs = (PatternReferenceTypeSpec)refSpec; |
| if (! prs.isUnique()){ |
| /* |
| * Class pattern event requests are never |
| * considered "resolved", since future class loads |
| * might also match. Create a new |
| * ClassPrepareRequest if necessary and keep |
| * trying to resolve. |
| */ |
| resolved = null; |
| if (prepareRequest == null) { |
| prepareRequest = refSpec.createPrepareRequest(); |
| prepareRequest.enable(); |
| } |
| } |
| } |
| } catch (VMNotConnectedException e) { |
| // Do nothing. Another resolve will be attempted when the |
| // VM is started. |
| } |
| return resolved; |
| } |
| |
| /** |
| * @return the eventRequest this spec has been resolved to, |
| * null if so far unresolved. |
| */ |
| EventRequest resolved() { |
| return resolved; |
| } |
| |
| /** |
| * @return true if this spec has been resolved. |
| */ |
| boolean isResolved() { |
| return resolved != null; |
| } |
| |
| protected boolean isJavaIdentifier(String s) { |
| if (s.length() == 0) { |
| return false; |
| } |
| |
| int cp = s.codePointAt(0); |
| if (! Character.isJavaIdentifierStart(cp)) { |
| return false; |
| } |
| |
| for (int i = Character.charCount(cp); i < s.length(); i += Character.charCount(cp)) { |
| cp = s.codePointAt(i); |
| if (! Character.isJavaIdentifierPart(cp)) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| String errorMessageFor(Exception e) { |
| if (e instanceof IllegalArgumentException) { |
| return (MessageOutput.format("Invalid command syntax")); |
| } else if (e instanceof RuntimeException) { |
| // A runtime exception that we were not expecting |
| throw (RuntimeException)e; |
| } else { |
| return (MessageOutput.format("Internal error; unable to set", |
| this.refSpec.toString())); |
| } |
| } |
| } |