| /* |
| * Copyright (c) 2004, 2012, 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.utilities.soql; |
| |
| import java.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.runtime.*; |
| |
| public class JSJavaFrame extends DefaultScriptObject { |
| private static final int FIELD_METHOD = 0; |
| private static final int FIELD_BCI = 1; |
| private static final int FIELD_LINE_NUMBER = 2; |
| private static final int FIELD_LOCALS = 3; |
| private static final int FIELD_THIS_OBJECT = 4; |
| private static final int FIELD_THREAD = 5; |
| private static final int FIELD_UNDEFINED = -1; |
| |
| public JSJavaFrame(JavaVFrame jvf, JSJavaFactory fac) { |
| this.jvf = jvf; |
| this.factory = fac; |
| } |
| |
| public Object get(String name) { |
| int fieldID = getFieldID(name); |
| switch (fieldID) { |
| case FIELD_METHOD: |
| return getMethod(); |
| case FIELD_BCI: |
| return new Integer(getBCI()); |
| case FIELD_LINE_NUMBER: |
| return new Integer(getLineNumber()); |
| case FIELD_LOCALS: |
| return getLocals(); |
| case FIELD_THIS_OBJECT: |
| return getThisObject(); |
| case FIELD_THREAD: |
| return getThread(); |
| case FIELD_UNDEFINED: |
| default: |
| return super.get(name); |
| } |
| } |
| |
| public Object[] getIds() { |
| Object[] fieldNames = fields.keySet().toArray(); |
| Object[] superFields = super.getIds(); |
| Object[] res = new Object[fieldNames.length + superFields.length]; |
| System.arraycopy(fieldNames, 0, res, 0, fieldNames.length); |
| System.arraycopy(superFields, 0, res, fieldNames.length, superFields.length); |
| return res; |
| } |
| |
| public boolean has(String name) { |
| if (getFieldID(name) != FIELD_UNDEFINED) { |
| return true; |
| } else { |
| return super.has(name); |
| } |
| } |
| |
| public void put(String name, Object value) { |
| if (getFieldID(name) == FIELD_UNDEFINED) { |
| super.put(name, value); |
| } |
| } |
| |
| public String toString() { |
| StringBuffer buf = new StringBuffer(); |
| buf.append("Frame (method="); |
| buf.append(jvf.getMethod().externalNameAndSignature()); |
| buf.append(", bci="); |
| buf.append(getBCI()); |
| buf.append(", line="); |
| buf.append(getLineNumber()); |
| buf.append(')'); |
| return buf.toString(); |
| } |
| |
| //-- Internals only below this point |
| private static Map fields = new HashMap(); |
| private static void addField(String name, int fieldId) { |
| fields.put(name, new Integer(fieldId)); |
| } |
| |
| private static int getFieldID(String name) { |
| Integer res = (Integer) fields.get(name); |
| return (res != null)? res.intValue() : FIELD_UNDEFINED; |
| } |
| |
| static { |
| addField("method", FIELD_METHOD); |
| addField("bci", FIELD_BCI); |
| addField("line", FIELD_LINE_NUMBER); |
| addField("locals", FIELD_LOCALS); |
| addField("thisObject", FIELD_THIS_OBJECT); |
| addField("thread", FIELD_THREAD); |
| } |
| |
| private JSJavaMethod getMethod() { |
| return factory.newJSJavaMethod(jvf.getMethod()); |
| } |
| |
| private int getBCI() { |
| return jvf.getBCI(); |
| } |
| |
| private int getLineNumber() { |
| int bci = jvf.getBCI(); |
| if (bci == -1) { |
| return 0; |
| } else { |
| int lineNum = jvf.getMethod().getLineNumberFromBCI(bci); |
| return (lineNum <= 0)? 0 : lineNum; |
| } |
| } |
| |
| private synchronized JSMap getLocals() { |
| if (localsCache == null) { |
| Map map = new HashMap(); |
| localsCache = factory.newJSMap(map); |
| StackValueCollection values = jvf.getLocals(); |
| Method method = jvf.getMethod(); |
| if (method.isNative() || ! method.hasLocalVariableTable() || |
| values == null) { |
| return localsCache; |
| } |
| |
| LocalVariableTableElement[] localVars = method.getLocalVariableTable(); |
| int bci = getBCI(); |
| List visibleVars = new ArrayList(0); |
| for (int i = 0; i < localVars.length; i++) { |
| LocalVariableTableElement cur = localVars[i]; |
| int startBCI = cur.getStartBCI(); |
| if (startBCI <= bci && bci < startBCI + cur.getLength()) { |
| visibleVars.add(cur); |
| } |
| } |
| |
| OopHandle handle = null; |
| ObjectHeap heap = VM.getVM().getObjectHeap(); |
| for (Iterator varItr = visibleVars.iterator(); varItr.hasNext();) { |
| LocalVariableTableElement cur = (LocalVariableTableElement) varItr.next(); |
| String name = method.getConstants().getSymbolAt(cur.getNameCPIndex()).asString(); |
| int slot = cur.getSlot(); |
| |
| String signature = method.getConstants().getSymbolAt(cur.getDescriptorCPIndex()).asString(); |
| BasicType variableType = BasicType.charToBasicType(signature.charAt(0)); |
| Object value = null; |
| if (variableType == BasicType.T_BOOLEAN) { |
| value = Boolean.valueOf(values.booleanAt(slot)); |
| } else if (variableType == BasicType.T_CHAR) { |
| value = new Character(values.charAt(slot)); |
| } else if (variableType == BasicType.T_FLOAT) { |
| value = new Float(values.floatAt(slot)); |
| } else if (variableType == BasicType.T_DOUBLE) { |
| value = new Double(values.doubleAt(slot)); |
| } else if (variableType == BasicType.T_BYTE) { |
| value = new Byte(values.byteAt(slot)); |
| } else if (variableType == BasicType.T_SHORT) { |
| value = new Short(values.shortAt(slot)); |
| } else if (variableType == BasicType.T_INT) { |
| value = new Integer(values.intAt(slot)); |
| } else if (variableType == BasicType.T_LONG) { |
| value = new Long(values.longAt(slot)); |
| } else if (variableType == BasicType.T_OBJECT || |
| variableType == BasicType.T_ARRAY) { |
| handle = values.oopHandleAt(slot); |
| value = factory.newJSJavaObject(heap.newOop(handle)); |
| } else { |
| // ignore |
| } |
| map.put(name, value); |
| } |
| } |
| return localsCache; |
| } |
| |
| private JSJavaObject getThisObject() { |
| Method method = jvf.getMethod(); |
| if (method.isStatic()) { |
| return null; |
| } |
| StackValueCollection values = jvf.getLocals(); |
| if (values != null) { |
| // 'this' at index 0. |
| OopHandle handle = values.oopHandleAt(0); |
| ObjectHeap heap = VM.getVM().getObjectHeap(); |
| return factory.newJSJavaObject(heap.newOop(handle)); |
| } else { |
| // can't get locals, return null. |
| return null; |
| } |
| } |
| |
| private JSJavaThread getThread() { |
| return factory.newJSJavaThread(jvf.getThread()); |
| } |
| |
| private final JavaVFrame jvf; |
| private final JSJavaFactory factory; |
| private JSMap localsCache; |
| } |