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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 1999, 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.gui; | |
| 27 | + | |
| 28 | +import java.io.*; | |
| 29 | +import java.util.*; | |
| 30 | + | |
| 31 | +import com.sun.jdi.*; | |
| 32 | +import com.sun.tools.example.debug.event.*; | |
| 33 | +import com.sun.tools.example.debug.bdi.*; | |
| 34 | + | |
| 35 | +public class ContextManager { | |
| 36 | + | |
| 37 | + private ClassManager classManager; | |
| 38 | + private ExecutionManager runtime; | |
| 39 | + | |
| 40 | + private String mainClassName; | |
| 41 | + private String vmArguments; | |
| 42 | + private String commandArguments; | |
| 43 | + private String remotePort; | |
| 44 | + | |
| 45 | + private ThreadReference currentThread; | |
| 46 | + | |
| 47 | + private boolean verbose; | |
| 48 | + | |
| 49 | + private ArrayList<ContextListener> contextListeners = new ArrayList<ContextListener>(); | |
| 50 | + | |
| 51 | + public ContextManager(Environment env) { | |
| 52 | + classManager = env.getClassManager(); | |
| 53 | + runtime = env.getExecutionManager(); | |
| 54 | + mainClassName = ""; | |
| 55 | + vmArguments = ""; | |
| 56 | + commandArguments = ""; | |
| 57 | + currentThread = null; | |
| 58 | + | |
| 59 | + ContextManagerListener listener = new ContextManagerListener(); | |
| 60 | + runtime.addJDIListener(listener); | |
| 61 | + runtime.addSessionListener(listener); | |
| 62 | + } | |
| 63 | + | |
| 64 | + // Program execution defaults. | |
| 65 | + | |
| 66 | + //### Should there be change listeners for these? | |
| 67 | + //### They would be needed if we expected a dialog to be | |
| 68 | + //### synchronized with command input while it was open. | |
| 69 | + | |
| 70 | + public String getMainClassName() { | |
| 71 | + return mainClassName; | |
| 72 | + } | |
| 73 | + | |
| 74 | + public void setMainClassName(String mainClassName) { | |
| 75 | + this.mainClassName = mainClassName; | |
| 76 | + } | |
| 77 | + | |
| 78 | + public String getVmArguments() { | |
| 79 | + return processClasspathDefaults(vmArguments); | |
| 80 | + } | |
| 81 | + | |
| 82 | + public void setVmArguments(String vmArguments) { | |
| 83 | + this.vmArguments = vmArguments; | |
| 84 | + } | |
| 85 | + | |
| 86 | + public String getProgramArguments() { | |
| 87 | + return commandArguments; | |
| 88 | + } | |
| 89 | + | |
| 90 | + public void setProgramArguments(String commandArguments) { | |
| 91 | + this.commandArguments = commandArguments; | |
| 92 | + } | |
| 93 | + | |
| 94 | + public String getRemotePort() { | |
| 95 | + return remotePort; | |
| 96 | + } | |
| 97 | + | |
| 98 | + public void setRemotePort(String remotePort) { | |
| 99 | + this.remotePort = remotePort; | |
| 100 | + | |
| 101 | + } | |
| 102 | + | |
| 103 | + | |
| 104 | + // Miscellaneous debugger session preferences. | |
| 105 | + | |
| 106 | + public boolean getVerboseFlag() { | |
| 107 | + return verbose; | |
| 108 | + } | |
| 109 | + | |
| 110 | + public void setVerboseFlag(boolean verbose) { | |
| 111 | + this.verbose = verbose; | |
| 112 | + } | |
| 113 | + | |
| 114 | + | |
| 115 | + // Thread focus. | |
| 116 | + | |
| 117 | + public ThreadReference getCurrentThread() { | |
| 118 | + return currentThread; | |
| 119 | + } | |
| 120 | + | |
| 121 | + public void setCurrentThread(ThreadReference t) { | |
| 122 | + if (t != currentThread) { | |
| 123 | + currentThread = t; | |
| 124 | + notifyCurrentThreadChanged(t); | |
| 125 | + } | |
| 126 | + } | |
| 127 | + | |
| 128 | + public void setCurrentThreadInvalidate(ThreadReference t) { | |
| 129 | + currentThread = t; | |
| 130 | + notifyCurrentFrameChanged(runtime.threadInfo(t), | |
| 131 | + 0, true); | |
| 132 | + } | |
| 133 | + | |
| 134 | + public void invalidateCurrentThread() { | |
| 135 | + notifyCurrentFrameChanged(null, 0, true); | |
| 136 | + } | |
| 137 | + | |
| 138 | + | |
| 139 | + // If a view is displaying the current thread, it may | |
| 140 | + // choose to indicate which frame is current in the | |
| 141 | + // sense of the command-line UI. It may also "warp" the | |
| 142 | + // selection to that frame when changed by an 'up' or 'down' | |
| 143 | + // command. Hence, a notifier is provided. | |
| 144 | + | |
| 145 | + /****** | |
| 146 | + public int getCurrentFrameIndex() { | |
| 147 | + return getCurrentFrameIndex(currentThreadInfo); | |
| 148 | + } | |
| 149 | + ******/ | |
| 150 | + | |
| 151 | + public int getCurrentFrameIndex(ThreadReference t) { | |
| 152 | + return getCurrentFrameIndex(runtime.threadInfo(t)); | |
| 153 | + } | |
| 154 | + | |
| 155 | + //### Used in StackTraceTool. | |
| 156 | + public int getCurrentFrameIndex(ThreadInfo tinfo) { | |
| 157 | + if (tinfo == null) { | |
| 158 | + return 0; | |
| 159 | + } | |
| 160 | + Integer currentFrame = (Integer)tinfo.getUserObject(); | |
| 161 | + if (currentFrame == null) { | |
| 162 | + return 0; | |
| 163 | + } else { | |
| 164 | + return currentFrame.intValue(); | |
| 165 | + } | |
| 166 | + } | |
| 167 | + | |
| 168 | + public int moveCurrentFrameIndex(ThreadReference t, int count) throws VMNotInterruptedException { | |
| 169 | + return setCurrentFrameIndex(t,count, true); | |
| 170 | + } | |
| 171 | + | |
| 172 | + public int setCurrentFrameIndex(ThreadReference t, int newIndex) throws VMNotInterruptedException { | |
| 173 | + return setCurrentFrameIndex(t, newIndex, false); | |
| 174 | + } | |
| 175 | + | |
| 176 | + public int setCurrentFrameIndex(int newIndex) throws VMNotInterruptedException { | |
| 177 | + if (currentThread == null) { | |
| 178 | + return 0; | |
| 179 | + } else { | |
| 180 | + return setCurrentFrameIndex(currentThread, newIndex, false); | |
| 181 | + } | |
| 182 | + } | |
| 183 | + | |
| 184 | + private int setCurrentFrameIndex(ThreadReference t, int x, boolean relative) throws VMNotInterruptedException { | |
| 185 | + boolean sameThread = t.equals(currentThread); | |
| 186 | + ThreadInfo tinfo = runtime.threadInfo(t); | |
| 187 | + if (tinfo == null) { | |
| 188 | + return 0; | |
| 189 | + } | |
| 190 | + int maxIndex = tinfo.getFrameCount()-1; | |
| 191 | + int oldIndex = getCurrentFrameIndex(tinfo); | |
| 192 | + int newIndex = relative? oldIndex + x : x; | |
| 193 | + if (newIndex > maxIndex) { | |
| 194 | + newIndex = maxIndex; | |
| 195 | + } else if (newIndex < 0) { | |
| 196 | + newIndex = 0; | |
| 197 | + } | |
| 198 | + if (!sameThread || newIndex != oldIndex) { // don't recurse | |
| 199 | + setCurrentFrameIndex(tinfo, newIndex); | |
| 200 | + } | |
| 201 | + return newIndex - oldIndex; | |
| 202 | + } | |
| 203 | + | |
| 204 | + private void setCurrentFrameIndex(ThreadInfo tinfo, int index) { | |
| 205 | + tinfo.setUserObject(new Integer(index)); | |
| 206 | + //### In fact, the value may not have changed at this point. | |
| 207 | + //### We need to signal that the user attempted to change it, | |
| 208 | + //### however, so that the selection can be "warped" to the | |
| 209 | + //### current location. | |
| 210 | + notifyCurrentFrameChanged(tinfo.thread(), index); | |
| 211 | + } | |
| 212 | + | |
| 213 | + public StackFrame getCurrentFrame() throws VMNotInterruptedException { | |
| 214 | + return getCurrentFrame(runtime.threadInfo(currentThread)); | |
| 215 | + } | |
| 216 | + | |
| 217 | + public StackFrame getCurrentFrame(ThreadReference t) throws VMNotInterruptedException { | |
| 218 | + return getCurrentFrame(runtime.threadInfo(t)); | |
| 219 | + } | |
| 220 | + | |
| 221 | + public StackFrame getCurrentFrame(ThreadInfo tinfo) throws VMNotInterruptedException { | |
| 222 | + int index = getCurrentFrameIndex(tinfo); | |
| 223 | + try { | |
| 224 | + // It is possible, though unlikely, that the VM was interrupted | |
| 225 | + // before the thread created its Java stack. | |
| 226 | + return tinfo.getFrame(index); | |
| 227 | + } catch (FrameIndexOutOfBoundsException e) { | |
| 228 | + return null; | |
| 229 | + } | |
| 230 | + } | |
| 231 | + | |
| 232 | + public void addContextListener(ContextListener cl) { | |
| 233 | + contextListeners.add(cl); | |
| 234 | + } | |
| 235 | + | |
| 236 | + public void removeContextListener(ContextListener cl) { | |
| 237 | + contextListeners.remove(cl); | |
| 238 | + } | |
| 239 | + | |
| 240 | + //### These notifiers are fired only in response to USER-INITIATED changes | |
| 241 | + //### to the current thread and current frame. When the current thread is set automatically | |
| 242 | + //### after a breakpoint hit or step completion, no event is generated. Instead, | |
| 243 | + //### interested parties are expected to listen for the BreakpointHit and StepCompleted | |
| 244 | + //### events. This convention is unclean, and I believe that it reflects a defect in | |
| 245 | + //### in the current architecture. Unfortunately, however, we cannot guarantee the | |
| 246 | + //### order in which various listeners receive a given event, and the handlers for | |
| 247 | + //### the very same events that cause automatic changes to the current thread may also | |
| 248 | + //### need to know the current thread. | |
| 249 | + | |
| 250 | + private void notifyCurrentThreadChanged(ThreadReference t) { | |
| 251 | + ThreadInfo tinfo = null; | |
| 252 | + int index = 0; | |
| 253 | + if (t != null) { | |
| 254 | + tinfo = runtime.threadInfo(t); | |
| 255 | + index = getCurrentFrameIndex(tinfo); | |
| 256 | + } | |
| 257 | + notifyCurrentFrameChanged(tinfo, index, false); | |
| 258 | + } | |
| 259 | + | |
| 260 | + private void notifyCurrentFrameChanged(ThreadReference t, int index) { | |
| 261 | + notifyCurrentFrameChanged(runtime.threadInfo(t), | |
| 262 | + index, false); | |
| 263 | + } | |
| 264 | + | |
| 265 | + private void notifyCurrentFrameChanged(ThreadInfo tinfo, int index, | |
| 266 | + boolean invalidate) { | |
| 267 | + ArrayList<ContextListener> l = new ArrayList<ContextListener>(contextListeners); | |
| 268 | + CurrentFrameChangedEvent evt = | |
| 269 | + new CurrentFrameChangedEvent(this, tinfo, index, invalidate); | |
| 270 | + for (int i = 0; i < l.size(); i++) { | |
| 271 | + l.get(i).currentFrameChanged(evt); | |
| 272 | + } | |
| 273 | + } | |
| 274 | + | |
| 275 | + private class ContextManagerListener extends JDIAdapter | |
| 276 | + implements SessionListener, JDIListener { | |
| 277 | + | |
| 278 | + // SessionListener | |
| 279 | + | |
| 280 | + @Override | |
| 281 | + public void sessionStart(EventObject e) { | |
| 282 | + invalidateCurrentThread(); | |
| 283 | + } | |
| 284 | + | |
| 285 | + @Override | |
| 286 | + public void sessionInterrupt(EventObject e) { | |
| 287 | + setCurrentThreadInvalidate(currentThread); | |
| 288 | + } | |
| 289 | + | |
| 290 | + @Override | |
| 291 | + public void sessionContinue(EventObject e) { | |
| 292 | + invalidateCurrentThread(); | |
| 293 | + } | |
| 294 | + | |
| 295 | + // JDIListener | |
| 296 | + | |
| 297 | + @Override | |
| 298 | + public void locationTrigger(LocationTriggerEventSet e) { | |
| 299 | + setCurrentThreadInvalidate(e.getThread()); | |
| 300 | + } | |
| 301 | + | |
| 302 | + @Override | |
| 303 | + public void exception(ExceptionEventSet e) { | |
| 304 | + setCurrentThreadInvalidate(e.getThread()); | |
| 305 | + } | |
| 306 | + | |
| 307 | + @Override | |
| 308 | + public void vmDisconnect(VMDisconnectEventSet e) { | |
| 309 | + invalidateCurrentThread(); | |
| 310 | + } | |
| 311 | + | |
| 312 | + } | |
| 313 | + | |
| 314 | + | |
| 315 | + /** | |
| 316 | + * Add a -classpath argument to the arguments passed to the exec'ed | |
| 317 | + * VM with the contents of CLASSPATH environment variable, | |
| 318 | + * if -classpath was not already specified. | |
| 319 | + * | |
| 320 | + * @param javaArgs the arguments to the VM being exec'd that | |
| 321 | + * potentially has a user specified -classpath argument. | |
| 322 | + * @return a javaArgs whose -classpath option has been added | |
| 323 | + */ | |
| 324 | + | |
| 325 | + private String processClasspathDefaults(String javaArgs) { | |
| 326 | + if (javaArgs.indexOf("-classpath ") == -1) { | |
| 327 | + StringBuffer munged = new StringBuffer(javaArgs); | |
| 328 | + SearchPath classpath = classManager.getClassPath(); | |
| 329 | + if (classpath.isEmpty()) { | |
| 330 | + String envcp = System.getProperty("env.class.path"); | |
| 331 | + if ((envcp != null) && (envcp.length() > 0)) { | |
| 332 | + munged.append(" -classpath " + envcp); | |
| 333 | + } | |
| 334 | + } else { | |
| 335 | + munged.append(" -classpath " + classpath.asString()); | |
| 336 | + } | |
| 337 | + return munged.toString(); | |
| 338 | + } else { | |
| 339 | + return javaArgs; | |
| 340 | + } | |
| 341 | + } | |
| 342 | + | |
| 343 | + private String appendPath(String path1, String path2) { | |
| 344 | + if (path1 == null || path1.length() == 0) { | |
| 345 | + return path2 == null ? "." : path2; | |
| 346 | + } else if (path2 == null || path2.length() == 0) { | |
| 347 | + return path1; | |
| 348 | + } else { | |
| 349 | + return path1 + File.pathSeparator + path2; | |
| 350 | + } | |
| 351 | + } | |
| 352 | + | |
| 353 | +} | |