1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.code.stack; 24 25 import jdk.vm.ci.meta.ResolvedJavaMethod; 26 27 public interface InspectedFrame { 28 29 /** 30 * Returns the value of the local at the given index. Currently only works for object values. 31 * This value is a copy iff {@link #isVirtual(int)} is true. 32 */ 33 Object getLocal(int index); 34 35 /** 36 * Returns whether the local at the given index is a virtual object, and therefore the object 37 * returned by {@link #getLocal(int)} is a copy. 38 */ 39 boolean isVirtual(int index); 40 41 /** 42 * Returns true if the stack frame is a compiled stack frame and there are virtual objects 43 * anywhere in the current state of the compiled method. This can return true even if 44 * {@link #isVirtual(int)} return false for all locals. 45 */ 46 boolean hasVirtualObjects(); 47 48 /** 49 * This method will materialize all virtual objects, deoptimize the stack frame and make sure 50 * that subsequent execution of the deoptimized frame uses the materialized values. 51 */ 52 void materializeVirtualObjects(boolean invalidateCode); 53 54 /** 55 * @return the current bytecode index 56 */ 57 int getBytecodeIndex(); 58 59 /** 60 * @return the current method 61 */ 62 ResolvedJavaMethod getMethod(); 63 64 /** 65 * Checks if the current method is equal to the given method. This is semantically equivalent to 66 * {@code method.equals(getMethod())}, but can be implemented more efficiently. 67 */ 68 boolean isMethod(ResolvedJavaMethod method); 69 }