| /* |
| * 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(); |
| } |
| } |