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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package com.sun.tools.example.debug.tty; | ||
| 27 | |||
| 28 | import com.sun.jdi.*; | ||
| 29 | import com.sun.jdi.request.EventRequest; | ||
| 30 | import com.sun.jdi.request.ExceptionRequest; | ||
| 31 | import com.sun.jdi.request.ClassPrepareRequest; | ||
| 32 | import com.sun.jdi.event.ClassPrepareEvent; | ||
| 33 | import java.util.ArrayList; | ||
| 34 | |||
| 35 | abstract class EventRequestSpec { | ||
| 36 | |||
| 37 | final ReferenceTypeSpec refSpec; | ||
| 38 | |||
| 39 | int suspendPolicy = EventRequest.SUSPEND_ALL; | ||
| 40 | |||
| 41 | EventRequest resolved = null; | ||
| 42 | ClassPrepareRequest prepareRequest = null; | ||
| 43 | |||
| 44 | EventRequestSpec(ReferenceTypeSpec refSpec) { | ||
| 45 | this.refSpec = refSpec; | ||
| 46 | } | ||
| 47 | |||
| 48 | /** | ||
| 49 | * The 'refType' is known to match, return the EventRequest. | ||
| 50 | */ | ||
| 51 | abstract EventRequest resolveEventRequest(ReferenceType refType) | ||
| 52 | throws Exception; | ||
| 53 | |||
| 54 | /** | ||
| 55 | * @return If this EventRequestSpec matches the 'refType' | ||
| 56 | * return the cooresponding EventRequest. Otherwise | ||
| 57 | * return null. | ||
| 58 | */ | ||
| 59 | synchronized EventRequest resolve(ClassPrepareEvent event) throws Exception { | ||
| 60 | if ((resolved == null) && | ||
| 61 | (prepareRequest != null) && | ||
| 62 | prepareRequest.equals(event.request())) { | ||
| 63 | |||
| 64 | resolved = resolveEventRequest(event.referenceType()); | ||
| 65 | prepareRequest.disable(); | ||
| 66 | Env.vm().eventRequestManager().deleteEventRequest(prepareRequest); | ||
| 67 | prepareRequest = null; | ||
| 68 | |||
| 69 | if (refSpec instanceof PatternReferenceTypeSpec) { | ||
| 70 | PatternReferenceTypeSpec prs = (PatternReferenceTypeSpec)refSpec; | ||
| 71 | if (! prs.isUnique()){ | ||
| 72 | /* | ||
| 73 | * Class pattern event requests are never | ||
| 74 | * considered "resolved", since future class loads | ||
| 75 | * might also match. | ||
| 76 | * Create and enable a new ClassPrepareRequest to | ||
| 77 | * keep trying to resolve. | ||
| 78 | */ | ||
| 79 | resolved = null; | ||
| 80 | prepareRequest = refSpec.createPrepareRequest(); | ||
| 81 | prepareRequest.enable(); | ||
| 82 | } | ||
| 83 | } | ||
| 84 | } | ||
| 85 | return resolved; | ||
| 86 | } | ||
| 87 | |||
| 88 | synchronized void remove() { | ||
| 89 | if (isResolved()) { | ||
| 90 | Env.vm().eventRequestManager().deleteEventRequest(resolved()); | ||
| 91 | } | ||
| 92 | if (refSpec instanceof PatternReferenceTypeSpec) { | ||
| 93 | PatternReferenceTypeSpec prs = (PatternReferenceTypeSpec)refSpec; | ||
| 94 | if (! prs.isUnique()){ | ||
| 95 | /* | ||
| 96 | * This is a class pattern. Track down and delete | ||
| 97 | * all EventRequests matching this spec. | ||
| 98 | * Note: Class patterns apply only to ExceptionRequests, | ||
| 99 | * so that is all we need to examine. | ||
| 100 | */ | ||
| 101 | ArrayList<ExceptionRequest> deleteList = new ArrayList<ExceptionRequest>(); | ||
| 102 | for (ExceptionRequest er : | ||
| 103 | Env.vm().eventRequestManager().exceptionRequests()) { | ||
| 104 | if (prs.matches(er.exception())) { | ||
| 105 | deleteList.add (er); | ||
| 106 | } | ||
| 107 | } | ||
| 108 | Env.vm().eventRequestManager().deleteEventRequests(deleteList); | ||
| 109 | } | ||
| 110 | } | ||
| 111 | } | ||
| 112 | |||
| 113 | private EventRequest resolveAgainstPreparedClasses() throws Exception { | ||
| 114 | for (ReferenceType refType : Env.vm().allClasses()) { | ||
| 115 | if (refType.isPrepared() && refSpec.matches(refType)) { | ||
| 116 | resolved = resolveEventRequest(refType); | ||
| 117 | } | ||
| 118 | } | ||
| 119 | return resolved; | ||
| 120 | } | ||
| 121 | |||
| 122 | synchronized EventRequest resolveEagerly() throws Exception { | ||
| 123 | try { | ||
| 124 | if (resolved == null) { | ||
| 125 | /* | ||
| 126 | * Not resolved. Schedule a prepare request so we | ||
| 127 | * can resolve later. | ||
| 128 | */ | ||
| 129 | prepareRequest = refSpec.createPrepareRequest(); | ||
| 130 | prepareRequest.enable(); | ||
| 131 | |||
| 132 | // Try to resolve in case the class is already loaded. | ||
| 133 | resolveAgainstPreparedClasses(); | ||
| 134 | if (resolved != null) { | ||
| 135 | prepareRequest.disable(); | ||
| 136 | Env.vm().eventRequestManager().deleteEventRequest(prepareRequest); | ||
| 137 | prepareRequest = null; | ||
| 138 | } | ||
| 139 | } | ||
| 140 | if (refSpec instanceof PatternReferenceTypeSpec) { | ||
| 141 | PatternReferenceTypeSpec prs = (PatternReferenceTypeSpec)refSpec; | ||
| 142 | if (! prs.isUnique()){ | ||
| 143 | /* | ||
| 144 | * Class pattern event requests are never | ||
| 145 | * considered "resolved", since future class loads | ||
| 146 | * might also match. Create a new | ||
| 147 | * ClassPrepareRequest if necessary and keep | ||
| 148 | * trying to resolve. | ||
| 149 | */ | ||
| 150 | resolved = null; | ||
| 151 | if (prepareRequest == null) { | ||
| 152 | prepareRequest = refSpec.createPrepareRequest(); | ||
| 153 | prepareRequest.enable(); | ||
| 154 | } | ||
| 155 | } | ||
| 156 | } | ||
| 157 | } catch (VMNotConnectedException e) { | ||
| 158 | // Do nothing. Another resolve will be attempted when the | ||
| 159 | // VM is started. | ||
| 160 | } | ||
| 161 | return resolved; | ||
| 162 | } | ||
| 163 | |||
| 164 | /** | ||
| 165 | * @return the eventRequest this spec has been resolved to, | ||
| 166 | * null if so far unresolved. | ||
| 167 | */ | ||
| 168 | EventRequest resolved() { | ||
| 169 | return resolved; | ||
| 170 | } | ||
| 171 | |||
| 172 | /** | ||
| 173 | * @return true if this spec has been resolved. | ||
| 174 | */ | ||
| 175 | boolean isResolved() { | ||
| 176 | return resolved != null; | ||
| 177 | } | ||
| 178 | |||
| 179 | protected boolean isJavaIdentifier(String s) { | ||
| 180 | if (s.length() == 0) { | ||
| 181 | return false; | ||
| 182 | } | ||
| 183 | |||
| 184 | int cp = s.codePointAt(0); | ||
| 185 | if (! Character.isJavaIdentifierStart(cp)) { | ||
| 186 | return false; | ||
| 187 | } | ||
| 188 | |||
| 189 | for (int i = Character.charCount(cp); i < s.length(); i += Character.charCount(cp)) { | ||
| 190 | cp = s.codePointAt(i); | ||
| 191 | if (! Character.isJavaIdentifierPart(cp)) { | ||
| 192 | return false; | ||
| 193 | } | ||
| 194 | } | ||
| 195 | |||
| 196 | return true; | ||
| 197 | } | ||
| 198 | |||
| 199 | String errorMessageFor(Exception e) { | ||
| 200 | if (e instanceof IllegalArgumentException) { | ||
| 201 | return (MessageOutput.format("Invalid command syntax")); | ||
| 202 | } else if (e instanceof RuntimeException) { | ||
| 203 | // A runtime exception that we were not expecting | ||
| 204 | throw (RuntimeException)e; | ||
| 205 | } else { | ||
| 206 | return (MessageOutput.format("Internal error; unable to set", | ||
| 207 | this.refSpec.toString())); | ||
| 208 | } | ||
| 209 | } | ||
| 210 | } | ||