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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/VirtualMachineCommandSet.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/VirtualMachineCommandSet.java | 472 |
1 files changed, 472 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/VirtualMachineCommandSet.java b/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/VirtualMachineCommandSet.java new file mode 100644 index 000000000..b6e0cfeb8 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/classpath/jdwp/processor/VirtualMachineCommandSet.java @@ -0,0 +1,472 @@ +/* VirtualMachineCommandSet.java -- class to implement the VirtualMachine + Command Set + Copyright (C) 2005, 2006, 2007 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.classpath.jdwp.processor; + +import gnu.classpath.jdwp.JdwpConstants; +import gnu.classpath.jdwp.VMFrame; +import gnu.classpath.jdwp.VMVirtualMachine; +import gnu.classpath.jdwp.exception.JdwpException; +import gnu.classpath.jdwp.exception.JdwpInternalErrorException; +import gnu.classpath.jdwp.exception.NotImplementedException; +import gnu.classpath.jdwp.id.ObjectId; +import gnu.classpath.jdwp.id.ReferenceTypeId; +import gnu.classpath.jdwp.util.JdwpString; +import gnu.classpath.jdwp.util.Signature; + +import java.io.DataOutputStream; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Iterator; +import java.util.Properties; + +/** + * A class representing the VirtualMachine Command Set. + * + * @author Aaron Luchko <aluchko@redhat.com> + */ +public class VirtualMachineCommandSet + extends CommandSet +{ + public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command) + throws JdwpException + { + boolean shutdown = false; + try + { + switch (command) + { + case JdwpConstants.CommandSet.VirtualMachine.VERSION: + executeVersion(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.CLASSES_BY_SIGNATURE: + executeClassesBySignature(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.ALL_CLASSES: + executeAllClasses(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.ALL_THREADS: + executeAllThreads(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.TOP_LEVEL_THREAD_GROUPS: + executeTopLevelThreadGroups(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.IDSIZES: + executeIDsizes(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.DISPOSE: + shutdown = true; + executeDispose(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.SUSPEND: + executeSuspend(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.RESUME: + executeResume(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.EXIT: + shutdown = true; + executeExit(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.CREATE_STRING: + executeCreateString(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.CAPABILITIES: + executeCapabilities(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.CLASS_PATHS: + executeClassPaths(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.DISPOSE_OBJECTS: + executeDisposeObjects(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.HOLD_EVENTS: + executeHoldEvents(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.RELEASE_EVENTS: + executeReleaseEvents(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.CAPABILITIES_NEW: + executeCapabilitiesNew(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.REDEFINE_CLASSES: + executeRedefineClasses(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.SET_DEFAULT_STRATUM: + executeSetDefaultStratum(bb, os); + break; + case JdwpConstants.CommandSet.VirtualMachine.ALL_CLASSES_WITH_GENERIC: + executeAllClassesWithGeneric(bb, os); + break; + default: + throw new NotImplementedException("Command " + command + + " not found in VirtualMachine Command Set."); + } + } + catch (IOException ex) + { + // The DataOutputStream we're using isn't talking to a socket at all + // So if we throw an IOException we're in serious trouble + throw new JdwpInternalErrorException(ex); + } + + return shutdown; + } + + private void executeVersion(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + + Properties props = System.getProperties(); + + int jdwpMajor = JdwpConstants.Version.MAJOR; + int jdwpMinor = JdwpConstants.Version.MINOR; + // The description field is pretty loosely defined + String description = "JDWP version " + jdwpMajor + "." + jdwpMinor + + ", JVM version " + props.getProperty("java.vm.name") + + " " + props.getProperty("java.vm.version") + " " + + props.getProperty("java.version"); + String vmVersion = props.getProperty("java.version"); + String vmName = props.getProperty("java.vm.name"); + JdwpString.writeString(os, description); + os.writeInt(jdwpMajor); + os.writeInt(jdwpMinor); + JdwpString.writeString(os, vmName); + JdwpString.writeString(os, vmVersion); + } + + private void executeClassesBySignature(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + String sig = JdwpString.readString(bb); + ArrayList allMatchingClasses = new ArrayList(); + + // This will be an Iterator over all loaded Classes + Collection classes = VMVirtualMachine.getAllLoadedClasses(); + Iterator iter = classes.iterator (); + + while (iter.hasNext()) + { + Class clazz = (Class) iter.next(); + String clazzSig = Signature.computeClassSignature(clazz); + if (clazzSig.equals(sig)) + allMatchingClasses.add(clazz); + } + + os.writeInt(allMatchingClasses.size()); + for (int i = 0; i < allMatchingClasses.size(); i++) + { + Class clazz = (Class) allMatchingClasses.get(i); + ReferenceTypeId id = idMan.getReferenceTypeId(clazz); + id.writeTagged(os); + int status = VMVirtualMachine.getClassStatus(clazz); + os.writeInt(status); + } + } + + private void executeAllClasses(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + Collection classes = VMVirtualMachine.getAllLoadedClasses(); + os.writeInt(classes.size ()); + + Iterator iter = classes.iterator (); + while (iter.hasNext()) + { + Class clazz = (Class) iter.next(); + ReferenceTypeId id = idMan.getReferenceTypeId(clazz); + id.writeTagged(os); + String sig = Signature.computeClassSignature(clazz); + JdwpString.writeString(os, sig); + int status = VMVirtualMachine.getClassStatus(clazz); + os.writeInt(status); + } + } + + private void executeAllThreads(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ThreadGroup jdwpGroup = Thread.currentThread().getThreadGroup(); + ThreadGroup root = getRootThreadGroup(jdwpGroup); + + int numThreads = root.activeCount(); + Thread allThreads[] = new Thread[numThreads]; + root.enumerate(allThreads); + + // We need to loop through for the true count since some threads may have + // been destroyed since we got + // activeCount so those spots in the array will be null. As well we must + // ignore any threads that belong to jdwp + numThreads = 0; + for (int i = 0; i < allThreads.length; i++) + { + Thread thread = allThreads[i]; + if (thread == null) + break; // No threads after this point + if (!thread.getThreadGroup().equals(jdwpGroup)) + numThreads++; + } + + os.writeInt(numThreads); + + for (int i = 0; i < allThreads.length; i++) + { + Thread thread = allThreads[i]; + if (thread == null) + break; // No threads after this point + if (!thread.getThreadGroup().equals(jdwpGroup)) + idMan.getObjectId(thread).write(os); + } + } + + private void executeTopLevelThreadGroups(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ThreadGroup jdwpGroup = Thread.currentThread().getThreadGroup (); + ThreadGroup root = getRootThreadGroup(jdwpGroup); + + os.writeInt(1); // Just one top level group allowed? + idMan.getObjectId(root).write(os); + } + + private void executeDispose(ByteBuffer bb, DataOutputStream os) + throws JdwpException + { + // resumeAllThreads isn't sufficient as a thread may have been + // suspended multiple times, we likely need a way to keep track of how many + // times a thread has been suspended or else a stronger resume method for + // this purpose + // VMVirtualMachine.resumeAllThreads (); + + // Simply shutting down the jdwp layer will take care of the rest of the + // shutdown other than disabling debugging in the VM + // VMVirtualMachine.disableDebugging(); + + // Don't implement this until we're sure how to remove all the debugging + // effects from the VM. + throw new NotImplementedException( + "Command VirtualMachine.Dispose not implemented"); + + } + + private void executeIDsizes(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + os.writeInt(ObjectId.SIZE); // fieldId FIXME + os.writeInt(ObjectId.SIZE); // methodId FIXME + os.writeInt(ObjectId.SIZE); // objectId + os.writeInt(ReferenceTypeId.SIZE); // referenceTypeId + os.writeInt(VMFrame.SIZE); // frameId + } + + private void executeSuspend(ByteBuffer bb, DataOutputStream os) + throws JdwpException + { + VMVirtualMachine.suspendAllThreads (); + } + + private void executeResume(ByteBuffer bb, DataOutputStream os) + throws JdwpException + { + VMVirtualMachine.resumeAllThreads (); + } + + private void executeExit(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + int exitCode = bb.getInt(); + System.exit (exitCode); + } + + private void executeCreateString(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + String string = JdwpString.readString(bb); + ObjectId stringId = idMan.getObjectId(string); + + // Since this string isn't referenced anywhere we'll disable garbage + // collection on it so it's still around when the debugger gets back to it. + stringId.disableCollection(); + stringId.write(os); + } + + private void executeCapabilities(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + os.writeBoolean(VMVirtualMachine.canWatchFieldModification); + os.writeBoolean(VMVirtualMachine.canWatchFieldAccess); + os.writeBoolean(VMVirtualMachine.canGetBytecodes); + os.writeBoolean(VMVirtualMachine.canGetSyntheticAttribute); + os.writeBoolean(VMVirtualMachine.canGetOwnedMonitorInfo); + os.writeBoolean(VMVirtualMachine.canGetCurrentContendedMonitor); + os.writeBoolean(VMVirtualMachine.canGetMonitorInfo); + } + + private void executeClassPaths(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + String baseDir = System.getProperty("user.dir"); + JdwpString.writeString(os, baseDir); + + // Find and write the classpath + String classPath = System.getProperty("java.class.path"); + String[] paths = classPath.split(":"); + + os.writeInt(paths.length); + for (int i = 0; i < paths.length; i++) + JdwpString.writeString(os, paths[i]); + + // Now the bootpath + String bootPath = System.getProperty("sun.boot.class.path"); + paths = bootPath.split(":"); + os.writeInt(paths.length); + for (int i = 0; i < paths.length; i++) + JdwpString.writeString(os, paths[i]); + } + + private void executeDisposeObjects(ByteBuffer bb, DataOutputStream os) + throws JdwpException + { + // Instead of going through the list of objects they give us it's probably + // better just to find the garbage collected objects ourselves + //idMan.update(); + } + + private void executeHoldEvents(ByteBuffer bb, DataOutputStream os) + throws JdwpException + { + // Going to have to implement a send queue somewhere and do this without + // triggering events + // Until then just don't implement + throw new NotImplementedException( + "Command VirtualMachine.HoldEvents not implemented"); + } + + // Opposite of executeHoldEvents + private void executeReleaseEvents(ByteBuffer bb, DataOutputStream os) + throws JdwpException + { + throw new NotImplementedException( + "Command VirtualMachine.ReleaseEvents not implemented"); + } + + private void executeCapabilitiesNew(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + final int CAPABILITIES_NEW_SIZE = 32; + + executeCapabilities(bb, os); + os.writeBoolean(VMVirtualMachine.canRedefineClasses); + os.writeBoolean(VMVirtualMachine.canAddMethod); + os.writeBoolean(VMVirtualMachine.canUnrestrictedlyRedefineClasses); + os.writeBoolean(VMVirtualMachine.canPopFrames); + os.writeBoolean(VMVirtualMachine.canUseInstanceFilters); + os.writeBoolean(VMVirtualMachine.canGetSourceDebugExtension); + os.writeBoolean(VMVirtualMachine.canRequestVMDeathEvent); + os.writeBoolean(VMVirtualMachine.canSetDefaultStratum); + for (int i = 15; i < CAPABILITIES_NEW_SIZE; i++) + { + // Future capabilities (currently unused) + os.writeBoolean(false); + } + } + + private void executeRedefineClasses(ByteBuffer bb, DataOutputStream os) + throws JdwpException + { + if (!VMVirtualMachine.canRedefineClasses) + { + String msg = "redefinition of classes is not supported"; + throw new NotImplementedException(msg); + } + + int classes = bb.getInt(); + Class[] types = new Class[classes]; + byte[][] bytecodes = new byte[classes][]; + for (int i = 0; i < classes; ++i) + { + ReferenceTypeId id = idMan.readReferenceTypeId(bb); + int classfile = bb.getInt(); + byte[] bytecode = new byte[classfile]; + bb.get(bytecode); + types[i] = id.getType(); + bytecodes[i] = bytecode; + } + + VMVirtualMachine.redefineClasses (types, bytecodes); + } + + private void executeSetDefaultStratum(ByteBuffer bb, DataOutputStream os) + throws JdwpException + { + if (!VMVirtualMachine.canSetDefaultStratum) + { + String msg = "setting the default stratum is not supported"; + throw new NotImplementedException(msg); + } + + String stratum = JdwpString.readString(bb); + VMVirtualMachine.setDefaultStratum(stratum); + } + + private void executeAllClassesWithGeneric(ByteBuffer bb, DataOutputStream os) + throws JdwpException + { + // We don't handle generics + throw new NotImplementedException( + "Command VirtualMachine.AllClassesWithGeneric not implemented"); + } + + /** + * Find the root ThreadGroup of this ThreadGroup + */ + private ThreadGroup getRootThreadGroup(ThreadGroup group) + { + ThreadGroup parent = group.getParent(); + + while (parent != null) + { + group = parent; + parent = group.getParent(); + } + return group; // This group was the root + } +} |