hotspot/agent/src/share/classes/sun/jvm/hotspot/jdi/StackFrameImpl.java - edge/openjdk - Git at Google

 /*
  * Copyright (c) 2002, 2005, 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.
  *
  * 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.
  *
  */

 package sun.jvm.hotspot.jdi;

 import com.sun.jdi.*;
 import sun.jvm.hotspot.oops.ObjectHeap;
 import sun.jvm.hotspot.debugger.OopHandle;
 import sun.jvm.hotspot.oops.Array;
 import sun.jvm.hotspot.oops.ObjArray;
 import sun.jvm.hotspot.oops.TypeArray;
 import sun.jvm.hotspot.oops.Instance;
 import sun.jvm.hotspot.runtime.BasicType;
 import sun.jvm.hotspot.runtime.JavaVFrame;
 import sun.jvm.hotspot.runtime.StackValue;
 import sun.jvm.hotspot.runtime.StackValueCollection;
 import sun.jvm.hotspot.utilities.Assert;
 import java.util.List;
 import java.util.Map;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Collections;

 public class StackFrameImpl extends MirrorImpl
                             implements StackFrame
 {
     /* Once false, frame should not be used.
      * access synchronized on (vm.state())
      */
     private boolean isValid = true;

     private final ThreadReferenceImpl thread;
     private final JavaVFrame saFrame;
     private final Location location;
     private Map visibleVariables =  null;
     private ObjectReference thisObject = null;

     StackFrameImpl(VirtualMachine vm, ThreadReferenceImpl thread,
                    JavaVFrame jvf) {
         super(vm);
         this.thread = thread;
         this.saFrame = jvf;

         sun.jvm.hotspot.oops.Method SAMethod = jvf.getMethod();

         ReferenceType rt = ((VirtualMachineImpl)vm).referenceType(SAMethod.getMethodHolder());

         this.location = new LocationImpl(vm, rt, SAMethod, (long)jvf.getBCI());
     }

     private void validateStackFrame() {
         if (!isValid) {
             throw new InvalidStackFrameException("Thread has been resumed");
         }
     }

     JavaVFrame getJavaVFrame() {
         return saFrame;
     }

     /**
      * Return the frame location.
      * Need not be synchronized since it cannot be provably stale.
      */
     public Location location() {
         validateStackFrame();
         return location;
     }

     /**
      * Return the thread holding the frame.
      * Need not be synchronized since it cannot be provably stale.
      */
     public ThreadReference thread() {
         validateStackFrame();
         return thread;
     }

     public boolean equals(Object obj) {
         if ((obj != null) && (obj instanceof StackFrameImpl)) {
             StackFrameImpl other = (StackFrameImpl)obj;
             return (saFrame.equals(other.saFrame));
         } else {
             return false;
         }
     }

     public int hashCode() {
         return saFrame.hashCode();
     }

     public ObjectReference thisObject() {
         validateStackFrame();
         MethodImpl currentMethod = (MethodImpl)location.method();
         if (currentMethod.isStatic() || currentMethod.isNative()) {
             return null;
         }
         if (thisObject == null) {
             StackValueCollection values = saFrame.getLocals();
             if (Assert.ASSERTS_ENABLED) {
                 Assert.that(values.size() > 0, "this is missing");
             }
             // 'this' at index 0.
             if (values.get(0).getType() == BasicType.getTConflict()) {
               return null;
             }
             OopHandle handle = values.oopHandleAt(0);
             ObjectHeap heap = vm.saObjectHeap();
             thisObject = vm.objectMirror(heap.newOop(handle));
         }
         return thisObject;
     }

     /**
      * Build the visible variable map.
      * Need not be synchronized since it cannot be provably stale.
      */
     private void createVisibleVariables() throws AbsentInformationException {
         if (visibleVariables == null) {
             List allVariables = location.method().variables();
             Map map = new HashMap(allVariables.size());

             Iterator iter = allVariables.iterator();
             while (iter.hasNext()) {
                 LocalVariableImpl variable = (LocalVariableImpl)iter.next();
                 String name = variable.name();
                 if (variable.isVisible(this)) {
                     LocalVariable existing = (LocalVariable)map.get(name);
                     if ((existing == null) ||
                         variable.hides(existing)) {
                         map.put(name, variable);
                     }
                 }
             }
             visibleVariables = map;
         }
     }

     /**
      * Return the list of visible variable in the frame.
      * Need not be synchronized since it cannot be provably stale.
      */
     public List visibleVariables() throws AbsentInformationException {
         validateStackFrame();
         createVisibleVariables();
         List mapAsList = new ArrayList(visibleVariables.values());
         Collections.sort(mapAsList);
         return mapAsList;
     }

     /**
      * Return a particular variable in the frame.
      * Need not be synchronized since it cannot be provably stale.
      */
     public LocalVariable visibleVariableByName(String name) throws AbsentInformationException  {
         validateStackFrame();
         createVisibleVariables();
         return (LocalVariable)visibleVariables.get(name);
     }

     public Value getValue(LocalVariable variable) {
         List list = new ArrayList(1);
         list.add(variable);
         Map map = getValues(list);
         return (Value)map.get(variable);
     }

     public Map getValues(List variables) {
         validateStackFrame();
         StackValueCollection values = saFrame.getLocals();

         int count = variables.size();
         Map map = new HashMap(count);
         for (int ii=0; ii<count; ++ii) {
             LocalVariableImpl variable = (LocalVariableImpl)variables.get(ii);
             if (!variable.isVisible(this)) {
                 throw new IllegalArgumentException(variable.name() +
                                  " is not valid at this frame location");
             }
             ValueImpl valueImpl;
             int ss = variable.slot();
             char c = variable.signature().charAt(0);
             BasicType variableType = BasicType.charToBasicType(c);
             valueImpl = getSlotValue(values, variableType, ss);
             map.put(variable, valueImpl);
         }
         return map;
     }

     public List getArgumentValues() {
         validateStackFrame();
         StackValueCollection values = saFrame.getLocals();
         MethodImpl mmm = (MethodImpl)location.method();
         if (mmm.isNative())
             return null;
         List argSigs = mmm.argumentSignatures();
         int count = argSigs.size();
         List res = new ArrayList(0);

         int slot = mmm.isStatic()? 0 : 1;
         for (int ii = 0; ii < count; ++slot, ++ii) {
             char sigChar = ((String)argSigs.get(ii)).charAt(0);
             BasicType variableType = BasicType.charToBasicType(sigChar);
             res.add(getSlotValue(values, variableType, slot));
             if (sigChar == 'J' || sigChar == 'D') {
                 slot++;
             }
         }
         return res;
     }

     private ValueImpl getSlotValue(StackValueCollection values,
                        BasicType variableType, int ss) {
         ValueImpl valueImpl = null;
         OopHandle handle = null;
         ObjectHeap heap = vm.saObjectHeap();
         if (values.get(ss).getType() == BasicType.getTConflict()) {
           // Dead locals, so just represent them as a zero of the appropriate type
           if (variableType == BasicType.T_BOOLEAN) {
             valueImpl = (BooleanValueImpl) vm.mirrorOf(false);
           } else if (variableType == BasicType.T_CHAR) {
             valueImpl = (CharValueImpl) vm.mirrorOf((char)0);
           } else if (variableType == BasicType.T_FLOAT) {
             valueImpl = (FloatValueImpl) vm.mirrorOf((float)0);
           } else if (variableType == BasicType.T_DOUBLE) {
             valueImpl = (DoubleValueImpl) vm.mirrorOf((double)0);
           } else if (variableType == BasicType.T_BYTE) {
             valueImpl = (ByteValueImpl) vm.mirrorOf((byte)0);
           } else if (variableType == BasicType.T_SHORT) {
             valueImpl = (ShortValueImpl) vm.mirrorOf((short)0);
           } else if (variableType == BasicType.T_INT) {
             valueImpl = (IntegerValueImpl) vm.mirrorOf((int)0);
           } else if (variableType == BasicType.T_LONG) {
             valueImpl = (LongValueImpl) vm.mirrorOf((long)0);
           } else if (variableType == BasicType.T_OBJECT) {
             // we may have an [Ljava/lang/Object; - i.e., Object[] with the
             // elements themselves may be arrays because every array is an Object.
             handle = null;
             valueImpl = (ObjectReferenceImpl) vm.objectMirror(heap.newOop(handle));
           } else if (variableType == BasicType.T_ARRAY) {
             handle = null;
             valueImpl = vm.arrayMirror((Array)heap.newOop(handle));
           } else if (variableType == BasicType.T_VOID) {
             valueImpl = new VoidValueImpl(vm);
           } else {
             throw new RuntimeException("Should not read here");
           }
         } else {
           if (variableType == BasicType.T_BOOLEAN) {
             valueImpl = (BooleanValueImpl) vm.mirrorOf(values.booleanAt(ss));
           } else if (variableType == BasicType.T_CHAR) {
             valueImpl = (CharValueImpl) vm.mirrorOf(values.charAt(ss));
           } else if (variableType == BasicType.T_FLOAT) {
             valueImpl = (FloatValueImpl) vm.mirrorOf(values.floatAt(ss));
           } else if (variableType == BasicType.T_DOUBLE) {
             valueImpl = (DoubleValueImpl) vm.mirrorOf(values.doubleAt(ss));
           } else if (variableType == BasicType.T_BYTE) {
             valueImpl = (ByteValueImpl) vm.mirrorOf(values.byteAt(ss));
           } else if (variableType == BasicType.T_SHORT) {
             valueImpl = (ShortValueImpl) vm.mirrorOf(values.shortAt(ss));
           } else if (variableType == BasicType.T_INT) {
             valueImpl = (IntegerValueImpl) vm.mirrorOf(values.intAt(ss));
           } else if (variableType == BasicType.T_LONG) {
             valueImpl = (LongValueImpl) vm.mirrorOf(values.longAt(ss));
           } else if (variableType == BasicType.T_OBJECT) {
             // we may have an [Ljava/lang/Object; - i.e., Object[] with the
             // elements themselves may be arrays because every array is an Object.
             handle = values.oopHandleAt(ss);
             valueImpl = (ObjectReferenceImpl) vm.objectMirror(heap.newOop(handle));
           } else if (variableType == BasicType.T_ARRAY) {
             handle = values.oopHandleAt(ss);
             valueImpl = vm.arrayMirror((Array)heap.newOop(handle));
           } else if (variableType == BasicType.T_VOID) {
             valueImpl = new VoidValueImpl(vm);
           } else {
             throw new RuntimeException("Should not read here");
           }
         }

         return valueImpl;
     }

     public void setValue(LocalVariable variableIntf, Value valueIntf)
         throws InvalidTypeException, ClassNotLoadedException {

         vm.throwNotReadOnlyException("StackFrame.setValue()");
     }

     public String toString() {
         return location.toString() + " in thread " + thread.toString();
     }
 }
	/*
	* Copyright (c) 2002, 2005, 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.
	*
	* 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.
	*
	*/

	package sun.jvm.hotspot.jdi;

	import com.sun.jdi.*;
	import sun.jvm.hotspot.oops.ObjectHeap;
	import sun.jvm.hotspot.debugger.OopHandle;
	import sun.jvm.hotspot.oops.Array;
	import sun.jvm.hotspot.oops.ObjArray;
	import sun.jvm.hotspot.oops.TypeArray;
	import sun.jvm.hotspot.oops.Instance;
	import sun.jvm.hotspot.runtime.BasicType;
	import sun.jvm.hotspot.runtime.JavaVFrame;
	import sun.jvm.hotspot.runtime.StackValue;
	import sun.jvm.hotspot.runtime.StackValueCollection;
	import sun.jvm.hotspot.utilities.Assert;
	import java.util.List;
	import java.util.Map;
	import java.util.ArrayList;
	import java.util.HashMap;
	import java.util.Iterator;
	import java.util.Collections;

	public class StackFrameImpl extends MirrorImpl
	implements StackFrame
	{
	/* Once false, frame should not be used.
	* access synchronized on (vm.state())
	*/
	private boolean isValid = true;

	private final ThreadReferenceImpl thread;
	private final JavaVFrame saFrame;
	private final Location location;
	private Map visibleVariables = null;
	private ObjectReference thisObject = null;

	StackFrameImpl(VirtualMachine vm, ThreadReferenceImpl thread,
	JavaVFrame jvf) {
	super(vm);
	this.thread = thread;
	this.saFrame = jvf;

	sun.jvm.hotspot.oops.Method SAMethod = jvf.getMethod();

	ReferenceType rt = ((VirtualMachineImpl)vm).referenceType(SAMethod.getMethodHolder());

	this.location = new LocationImpl(vm, rt, SAMethod, (long)jvf.getBCI());
	}

	private void validateStackFrame() {
	if (!isValid) {
	throw new InvalidStackFrameException("Thread has been resumed");
	}
	}

	JavaVFrame getJavaVFrame() {
	return saFrame;
	}

	/**
	* Return the frame location.
	* Need not be synchronized since it cannot be provably stale.
	*/
	public Location location() {
	validateStackFrame();
	return location;
	}

	/**
	* Return the thread holding the frame.
	* Need not be synchronized since it cannot be provably stale.
	*/
	public ThreadReference thread() {
	validateStackFrame();
	return thread;
	}

	public boolean equals(Object obj) {
	if ((obj != null) && (obj instanceof StackFrameImpl)) {
	StackFrameImpl other = (StackFrameImpl)obj;
	return (saFrame.equals(other.saFrame));
	} else {
	return false;
	}
	}

	public int hashCode() {
	return saFrame.hashCode();
	}

	public ObjectReference thisObject() {
	validateStackFrame();
	MethodImpl currentMethod = (MethodImpl)location.method();
	if (currentMethod.isStatic() \|\| currentMethod.isNative()) {
	return null;
	}
	if (thisObject == null) {
	StackValueCollection values = saFrame.getLocals();
	if (Assert.ASSERTS_ENABLED) {
	Assert.that(values.size() > 0, "this is missing");
	}
	// 'this' at index 0.
	if (values.get(0).getType() == BasicType.getTConflict()) {
	return null;
	}
	OopHandle handle = values.oopHandleAt(0);
	ObjectHeap heap = vm.saObjectHeap();
	thisObject = vm.objectMirror(heap.newOop(handle));
	}
	return thisObject;
	}

	/**
	* Build the visible variable map.
	* Need not be synchronized since it cannot be provably stale.
	*/
	private void createVisibleVariables() throws AbsentInformationException {
	if (visibleVariables == null) {
	List allVariables = location.method().variables();
	Map map = new HashMap(allVariables.size());

	Iterator iter = allVariables.iterator();
	while (iter.hasNext()) {
	LocalVariableImpl variable = (LocalVariableImpl)iter.next();
	String name = variable.name();
	if (variable.isVisible(this)) {
	LocalVariable existing = (LocalVariable)map.get(name);
	if ((existing == null) \|\|
	variable.hides(existing)) {
	map.put(name, variable);
	}
	}
	}
	visibleVariables = map;
	}
	}

	/**
	* Return the list of visible variable in the frame.
	* Need not be synchronized since it cannot be provably stale.
	*/
	public List visibleVariables() throws AbsentInformationException {
	validateStackFrame();
	createVisibleVariables();
	List mapAsList = new ArrayList(visibleVariables.values());
	Collections.sort(mapAsList);
	return mapAsList;
	}

	/**
	* Return a particular variable in the frame.
	* Need not be synchronized since it cannot be provably stale.
	*/
	public LocalVariable visibleVariableByName(String name) throws AbsentInformationException {
	validateStackFrame();
	createVisibleVariables();
	return (LocalVariable)visibleVariables.get(name);
	}

	public Value getValue(LocalVariable variable) {
	List list = new ArrayList(1);
	list.add(variable);
	Map map = getValues(list);
	return (Value)map.get(variable);
	}

	public Map getValues(List variables) {
	validateStackFrame();
	StackValueCollection values = saFrame.getLocals();

	int count = variables.size();
	Map map = new HashMap(count);
	for (int ii=0; ii<count; ++ii) {
	LocalVariableImpl variable = (LocalVariableImpl)variables.get(ii);
	if (!variable.isVisible(this)) {
	throw new IllegalArgumentException(variable.name() +
	" is not valid at this frame location");
	}
	ValueImpl valueImpl;
	int ss = variable.slot();
	char c = variable.signature().charAt(0);
	BasicType variableType = BasicType.charToBasicType(c);
	valueImpl = getSlotValue(values, variableType, ss);
	map.put(variable, valueImpl);
	}
	return map;
	}

	public List getArgumentValues() {
	validateStackFrame();
	StackValueCollection values = saFrame.getLocals();
	MethodImpl mmm = (MethodImpl)location.method();
	if (mmm.isNative())
	return null;
	List argSigs = mmm.argumentSignatures();
	int count = argSigs.size();
	List res = new ArrayList(0);

	int slot = mmm.isStatic()? 0 : 1;
	for (int ii = 0; ii < count; ++slot, ++ii) {
	char sigChar = ((String)argSigs.get(ii)).charAt(0);
	BasicType variableType = BasicType.charToBasicType(sigChar);
	res.add(getSlotValue(values, variableType, slot));
	if (sigChar == 'J' \|\| sigChar == 'D') {
	slot++;
	}
	}
	return res;
	}

	private ValueImpl getSlotValue(StackValueCollection values,
	BasicType variableType, int ss) {
	ValueImpl valueImpl = null;
	OopHandle handle = null;
	ObjectHeap heap = vm.saObjectHeap();
	if (values.get(ss).getType() == BasicType.getTConflict()) {
	// Dead locals, so just represent them as a zero of the appropriate type
	if (variableType == BasicType.T_BOOLEAN) {
	valueImpl = (BooleanValueImpl) vm.mirrorOf(false);
	} else if (variableType == BasicType.T_CHAR) {
	valueImpl = (CharValueImpl) vm.mirrorOf((char)0);
	} else if (variableType == BasicType.T_FLOAT) {
	valueImpl = (FloatValueImpl) vm.mirrorOf((float)0);
	} else if (variableType == BasicType.T_DOUBLE) {
	valueImpl = (DoubleValueImpl) vm.mirrorOf((double)0);
	} else if (variableType == BasicType.T_BYTE) {
	valueImpl = (ByteValueImpl) vm.mirrorOf((byte)0);
	} else if (variableType == BasicType.T_SHORT) {
	valueImpl = (ShortValueImpl) vm.mirrorOf((short)0);
	} else if (variableType == BasicType.T_INT) {
	valueImpl = (IntegerValueImpl) vm.mirrorOf((int)0);
	} else if (variableType == BasicType.T_LONG) {
	valueImpl = (LongValueImpl) vm.mirrorOf((long)0);
	} else if (variableType == BasicType.T_OBJECT) {
	// we may have an [Ljava/lang/Object; - i.e., Object[] with the
	// elements themselves may be arrays because every array is an Object.
	handle = null;
	valueImpl = (ObjectReferenceImpl) vm.objectMirror(heap.newOop(handle));
	} else if (variableType == BasicType.T_ARRAY) {
	handle = null;
	valueImpl = vm.arrayMirror((Array)heap.newOop(handle));
	} else if (variableType == BasicType.T_VOID) {
	valueImpl = new VoidValueImpl(vm);
	} else {
	throw new RuntimeException("Should not read here");
	}
	} else {
	if (variableType == BasicType.T_BOOLEAN) {
	valueImpl = (BooleanValueImpl) vm.mirrorOf(values.booleanAt(ss));
	} else if (variableType == BasicType.T_CHAR) {
	valueImpl = (CharValueImpl) vm.mirrorOf(values.charAt(ss));
	} else if (variableType == BasicType.T_FLOAT) {
	valueImpl = (FloatValueImpl) vm.mirrorOf(values.floatAt(ss));
	} else if (variableType == BasicType.T_DOUBLE) {
	valueImpl = (DoubleValueImpl) vm.mirrorOf(values.doubleAt(ss));
	} else if (variableType == BasicType.T_BYTE) {
	valueImpl = (ByteValueImpl) vm.mirrorOf(values.byteAt(ss));
	} else if (variableType == BasicType.T_SHORT) {
	valueImpl = (ShortValueImpl) vm.mirrorOf(values.shortAt(ss));
	} else if (variableType == BasicType.T_INT) {
	valueImpl = (IntegerValueImpl) vm.mirrorOf(values.intAt(ss));
	} else if (variableType == BasicType.T_LONG) {
	valueImpl = (LongValueImpl) vm.mirrorOf(values.longAt(ss));
	} else if (variableType == BasicType.T_OBJECT) {
	// we may have an [Ljava/lang/Object; - i.e., Object[] with the
	// elements themselves may be arrays because every array is an Object.
	handle = values.oopHandleAt(ss);
	valueImpl = (ObjectReferenceImpl) vm.objectMirror(heap.newOop(handle));
	} else if (variableType == BasicType.T_ARRAY) {
	handle = values.oopHandleAt(ss);
	valueImpl = vm.arrayMirror((Array)heap.newOop(handle));
	} else if (variableType == BasicType.T_VOID) {
	valueImpl = new VoidValueImpl(vm);
	} else {
	throw new RuntimeException("Should not read here");
	}
	}

	return valueImpl;
	}

	public void setValue(LocalVariable variableIntf, Value valueIntf)
	throws InvalidTypeException, ClassNotLoadedException {

	vm.throwNotReadOnlyException("StackFrame.setValue()");
	}

	public String toString() {
	return location.toString() + " in thread " + thread.toString();
	}
	}