1 /* 2 * Copyright (c) 2016, 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 org.graalvm.compiler.bytecode; 24 25 import jdk.vm.ci.meta.ConstantPool; 26 import jdk.vm.ci.meta.ExceptionHandler; 27 import jdk.vm.ci.meta.LineNumberTable; 28 import jdk.vm.ci.meta.LocalVariableTable; 29 import jdk.vm.ci.meta.ProfilingInfo; 30 import jdk.vm.ci.meta.ResolvedJavaMethod; 31 32 /** 33 * An interface for accessing the bytecode properties of a {@link ResolvedJavaMethod} that allows 34 * for different properties than those returned by {@link ResolvedJavaMethod}. Since the bytecode 35 * accessed directly from {@link ResolvedJavaMethod} may have been subject to bytecode 36 * instrumentation and VM rewriting, this indirection can be used to enable access to the original 37 * bytecode of a method (i.e., as defined in a class file). 38 */ 39 public interface Bytecode { 40 41 /** 42 * Gets the method this object supplies bytecode for. 43 */ 44 ResolvedJavaMethod getMethod(); 45 46 byte[] getCode(); 47 48 int getCodeSize(); 49 50 int getMaxStackSize(); 51 52 int getMaxLocals(); 53 54 ConstantPool getConstantPool(); 55 56 LineNumberTable getLineNumberTable(); 57 58 LocalVariableTable getLocalVariableTable(); 59 60 StackTraceElement asStackTraceElement(int bci); 61 62 ProfilingInfo getProfilingInfo(); 63 64 ExceptionHandler[] getExceptionHandlers(); 65 66 static String toLocation(Bytecode bytecode, int bci) { 67 return appendLocation(new StringBuilder(), bytecode, bci).toString(); 68 } 69 70 static StringBuilder appendLocation(StringBuilder sb, Bytecode bytecode, int bci) { 71 if (bytecode != null) { 72 StackTraceElement ste = bytecode.asStackTraceElement(bci); 73 if (ste.getFileName() != null && ste.getLineNumber() > 0) { 74 sb.append(ste); 75 } else { 76 sb.append(bytecode.getMethod().format("%H.%n(%p)")); 77 } 78 } else { 79 sb.append("Null method"); 80 } 81 return sb.append(" [bci: ").append(bci).append(']'); 82 } 83 }