| /* |
| * Copyright (c) 2015, 2017, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 java.lang; |
| |
| final class LiveStackFrameInfo extends StackFrameInfo implements LiveStackFrame { |
| private static Object[] EMPTY_ARRAY = new Object[0]; |
| |
| // These flags must match the values maintained in the VM |
| private static final int MODE_INTERPRETED = 0x01; |
| private static final int MODE_COMPILED = 0x02; |
| |
| LiveStackFrameInfo(StackWalker walker) { |
| super(walker); |
| } |
| |
| // These fields are initialized by the VM if ExtendedOption.LOCALS_AND_OPERANDS is set |
| private Object[] monitors = EMPTY_ARRAY; |
| private Object[] locals = EMPTY_ARRAY; |
| private Object[] operands = EMPTY_ARRAY; |
| private int mode = 0; |
| |
| @Override |
| public Object[] getMonitors() { |
| return monitors; |
| } |
| |
| @Override |
| public Object[] getLocals() { |
| return locals; |
| } |
| |
| @Override |
| public Object[] getStack() { |
| return operands; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder retVal = new StringBuilder(super.toString()); |
| if (mode != 0) { |
| retVal.append("("); |
| if ((mode & MODE_INTERPRETED) == MODE_INTERPRETED) { |
| retVal.append(" interpreted "); |
| } |
| if ((mode & MODE_COMPILED) == MODE_COMPILED) { |
| retVal.append(" compiled "); |
| } |
| retVal.append(")"); |
| } |
| return retVal.toString(); |
| } |
| |
| /* |
| * Convert primitive value to {@code PrimitiveSlot} object to represent |
| * a local variable or an element on the operand stack of primitive type. |
| */ |
| |
| static PrimitiveSlot asPrimitive(int value) { |
| return new PrimitiveSlot32(value); |
| } |
| |
| static PrimitiveSlot asPrimitive(long value) { |
| return new PrimitiveSlot64(value); |
| } |
| |
| private static class PrimitiveSlot32 extends PrimitiveSlot { |
| final int value; |
| PrimitiveSlot32(int value) { |
| this.value = value; |
| } |
| |
| @Override |
| public int size() { |
| return 4; |
| } |
| |
| @Override |
| public int intValue() { |
| return value; |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(value); |
| } |
| } |
| |
| private static class PrimitiveSlot64 extends PrimitiveSlot { |
| final long value; |
| PrimitiveSlot64(long value) { |
| this.value = value; |
| } |
| |
| @Override |
| public int size() { |
| return 8; |
| } |
| |
| @Override |
| public long longValue() { |
| return value; |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(value); |
| } |
| } |
| } |