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Diffstat (limited to 'gnu/classpath/jdwp/processor/ObjectReferenceCommandSet.java')
| -rw-r--r-- | gnu/classpath/jdwp/processor/ObjectReferenceCommandSet.java | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/gnu/classpath/jdwp/processor/ObjectReferenceCommandSet.java b/gnu/classpath/jdwp/processor/ObjectReferenceCommandSet.java new file mode 100644 index 000000000..56980eecd --- /dev/null +++ b/gnu/classpath/jdwp/processor/ObjectReferenceCommandSet.java @@ -0,0 +1,266 @@ +/* ObjectReferenceCommandSet.java -- lass to implement the ObjectReference + Command Set + Copyright (C) 2005 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.IVirtualMachine; +import gnu.classpath.jdwp.Jdwp; +import gnu.classpath.jdwp.JdwpConstants; +import gnu.classpath.jdwp.exception.InvalidFieldException; +import gnu.classpath.jdwp.exception.JdwpException; +import gnu.classpath.jdwp.exception.JdwpInternalErrorException; +import gnu.classpath.jdwp.exception.NotImplementedException; +import gnu.classpath.jdwp.id.IdManager; +import gnu.classpath.jdwp.id.ObjectId; +import gnu.classpath.jdwp.id.ReferenceTypeId; +import gnu.classpath.jdwp.util.Value; +import gnu.classpath.jdwp.util.MethodInvoker; + +import java.io.DataOutputStream; +import java.io.IOException; +import java.lang.reflect.Field; +import java.lang.reflect.Method; +import java.nio.ByteBuffer; + +/** + * A class representing the ObjectReference Command Set. + * + * @author Aaron Luchko <aluchko@redhat.com> + */ +public class ObjectReferenceCommandSet implements CommandSet +{ + // Our hook into the jvm + private final IVirtualMachine vm = Jdwp.getIVirtualMachine(); + + // Manages all the different ids that are assigned by jdwp + private final IdManager idMan = Jdwp.getIdManager(); + + public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command) + throws JdwpException + { + try + { + switch (command) + { + case JdwpConstants.CommandSet.ObjectReference.REFERENCE_TYPE: + executeReferenceType(bb, os); + break; + case JdwpConstants.CommandSet.ObjectReference.GET_VALUES: + executeGetValues(bb, os); + break; + case JdwpConstants.CommandSet.ObjectReference.SET_VALUES: + executeSetValues(bb, os); + break; + case JdwpConstants.CommandSet.ObjectReference.MONITOR_INFO: + executeMonitorInfo(bb, os); + break; + case JdwpConstants.CommandSet.ObjectReference.INVOKE_METHOD: + executeInvokeMethod(bb, os); + break; + case JdwpConstants.CommandSet.ObjectReference.DISABLE_COLLECTION: + executeDisableCollection(bb, os); + break; + case JdwpConstants.CommandSet.ObjectReference.ENABLE_COLLECTION: + executeEnableCollection(bb, os); + break; + case JdwpConstants.CommandSet.ObjectReference.IS_COLLECTED: + executeIsCollected(bb, os); + break; + default: + throw new NotImplementedException("Command " + command + + " not found in ObjectReference 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 true; + } + + private void executeReferenceType(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ObjectId oid = idMan.readId(bb); + Object obj = oid.getObject(); + Class clazz = obj.getClass(); + ReferenceTypeId refId = idMan.getReferenceTypeId(clazz); + refId.writeTagged(os); + } + + private void executeGetValues(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ObjectId oid = idMan.readId(bb); + Object obj = oid.getObject(); + + int numFields = bb.getInt(); + + os.writeInt(numFields); // Looks pointless but this is the protocol + + for (int i = 0; i < numFields; i++) + { + Field field = (Field) idMan.readId(bb).getObject(); + try + { + field.setAccessible(true); // Might be a private field + Object value = field.get(obj); + Value.writeTaggedValue(os, value); + } + catch (IllegalArgumentException ex) + { + // I suppose this would best qualify as an invalid field then + throw new InvalidFieldException(ex); + } + catch (IllegalAccessException ex) + { + // Since we set it as accessible this really shouldn't happen + throw new JdwpInternalErrorException(ex); + } + } + } + + private void executeSetValues(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ObjectId oid = idMan.readId(bb); + Object obj = oid.getObject(); + + int numFields = bb.getInt(); + + for (int i = 0; i < numFields; i++) + { + Field field = (Field) idMan.readId(bb).getObject(); + Object value = Value.getUntaggedObj(bb, field.getType()); + try + { + field.setAccessible(true); // Might be a private field + field.set(obj, value); + } + catch (IllegalArgumentException ex) + { + // I suppose this would best qualify as an invalid field then + throw new InvalidFieldException(ex); + } + catch (IllegalAccessException ex) + { + // Since we set it as accessible this really shouldn't happen + throw new JdwpInternalErrorException(ex); + } + } + } + + private void executeMonitorInfo(ByteBuffer bb, DataOutputStream os) + throws JdwpException + { + // This command is optional, determined by VirtualMachines CapabilitiesNew + // so we'll leave it till later to implement + throw new NotImplementedException( + "Command ExecuteMonitorInfo not implemented."); + + } + + private void executeInvokeMethod(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ObjectId oid = idMan.readId(bb); + Object obj = oid.getObject(); + + ObjectId tid = idMan.readId(bb); + Thread thread = (Thread) tid.getObject(); + + ReferenceTypeId rid = idMan.readReferenceTypeId(bb); + Class clazz = rid.getType(); + + ObjectId mid = idMan.readId(bb); + Method method = (Method) mid.getObject(); + + int args = bb.getInt(); + Object[] values = new Object[args]; + + for (int i = 0; i < args; i++) + { + values[i] = Value.getObj(bb); + } + + int invokeOptions = bb.getInt(); + + if ((invokeOptions & JdwpConstants.InvokeOptions.INVOKE_SINGLE_THREADED) != 0) + { // We must suspend all other running threads first + vm.suspendAllThreadsExcept(Thread.currentThread().getThreadGroup()); + } + boolean nonVirtual; + if ((invokeOptions & JdwpConstants.InvokeOptions.INVOKE_NONVIRTUAL) != 0) + nonVirtual = true; + else + nonVirtual = false; + MethodInvoker vmi = new MethodInvoker(vm); + + vmi.executeMethod(obj, thread, clazz, method, values, nonVirtual); + Object value = vmi.getReturnedValue(); + ObjectId exceptionId = vmi.getExceptionId(); + + Value.writeTaggedValue(os, value); + exceptionId.writeTagged(os); + } + + private void executeDisableCollection(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ObjectId oid = idMan.readId(bb); + oid.disableCollection(); + } + + private void executeEnableCollection(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ObjectId oid = idMan.readId(bb); + oid.enableCollection(); + } + + private void executeIsCollected(ByteBuffer bb, DataOutputStream os) + throws JdwpException, IOException + { + ObjectId oid = idMan.readId(bb); + boolean collected = oid.isCollected(); + os.writeBoolean(collected); + } +} |