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 24 25 package org.graalvm.compiler.bytecode; 26 27 import jdk.vm.ci.meta.ConstantPool; 28 import jdk.vm.ci.meta.ExceptionHandler; 29 import jdk.vm.ci.meta.LineNumberTable; 30 import jdk.vm.ci.meta.LocalVariableTable; 31 import jdk.vm.ci.meta.ProfilingInfo; 32 import jdk.vm.ci.meta.ResolvedJavaMethod; 33 34 /** 35 * An interface for accessing the bytecode properties of a {@link ResolvedJavaMethod} that allows 36 * for different properties than those returned by {@link ResolvedJavaMethod}. Since the bytecode 37 * accessed directly from {@link ResolvedJavaMethod} may have been subject to bytecode 38 * instrumentation and VM rewriting, this indirection can be used to enable access to the original 39 * bytecode of a method (i.e., as defined in a class file). 40 */ 41 public interface Bytecode { 42 43 /** 44 * Gets the method this object supplies bytecode for. 45 */ 46 ResolvedJavaMethod getMethod(); 47 48 byte[] getCode(); 49 50 int getCodeSize(); 51 52 int getMaxStackSize(); 53 54 int getMaxLocals(); 55 56 ConstantPool getConstantPool(); 57 58 LineNumberTable getLineNumberTable(); 59 60 LocalVariableTable getLocalVariableTable(); 61 62 StackTraceElement asStackTraceElement(int bci); 63 64 ProfilingInfo getProfilingInfo(); 65 66 ExceptionHandler[] getExceptionHandlers(); 67 68 /** 69 * Gets the {@link BytecodeProvider} from which this object was acquired. 70 */ 71 BytecodeProvider getOrigin(); 72 73 static String toLocation(Bytecode bytecode, int bci) { 74 return appendLocation(new StringBuilder(), bytecode, bci).toString(); 75 } 76 77 static StringBuilder appendLocation(StringBuilder sb, Bytecode bytecode, int bci) { 78 if (bytecode != null) { 79 StackTraceElement ste = bytecode.asStackTraceElement(bci); 80 if (ste.getFileName() != null && ste.getLineNumber() > 0) { 81 sb.append(ste); 82 } else { 83 sb.append(bytecode.getMethod().format("%H.%n(%p)")); 84 } 85 } else { 86 sb.append("Null method"); 87 } 88 return sb.append(" [bci: ").append(bci).append(']'); 89 } 90 }