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 24package jdk.tools.jaotc; 25 26import org.graalvm.compiler.bytecode.Bytecodes; 27 28import jdk.vm.ci.code.BytecodePosition; 29import jdk.vm.ci.code.site.Call; 30import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod; 31import jdk.vm.ci.meta.ResolvedJavaMethod; 32 33public class MiscUtils { 34 35 /** 36 * Name a java method with class and signature to make it unique. 37 * 38 * @param method to generate unique identifier for 39 * @return Unique name for this method including class and signature 40 **/ 41 public static String uniqueMethodName(ResolvedJavaMethod method) { 42 String className = method.getDeclaringClass().toClassName(); 43 String name = className + "." + method.getName() + method.getSignature().toMethodDescriptor(); 44 return name; 45 } 46 47 public static boolean isStaticCall(Call call) { 48 if (isJavaCall(call)) { 49 return ((getByteCode(call) & 0xFF) == Bytecodes.INVOKESTATIC); 50 } 51 return false; 52 } 53 54 public static boolean isSpecialCall(Call call) { 55 if (isJavaCall(call)) { 56 return ((getByteCode(call) & 0xFF) == Bytecodes.INVOKESPECIAL); 57 } 58 return false; 59 } 60 61 private static boolean isInvokeVirtual(Call call) { 62 if (isJavaCall(call)) { 63 return ((getByteCode(call) & 0xFF) == Bytecodes.INVOKEVIRTUAL) || ((getByteCode(call) & 0xFF) == Bytecodes.INVOKEINTERFACE); 64 } 65 return false; 66 } 67 68 public static boolean isVirtualCall(CompiledMethodInfo methodInfo, Call call) { 69 return isInvokeVirtual(call) && !methodInfo.hasMark(call, MarkId.INVOKESPECIAL); 70 } 71 72 public static boolean isOptVirtualCall(CompiledMethodInfo methodInfo, Call call) { 73 return isInvokeVirtual(call) && methodInfo.hasMark(call, MarkId.INVOKESPECIAL); 74 } 75 76 private static boolean isJavaCall(Call call) { 77 // If there is no associated debug info return false 78 if (call.debugInfo == null) { 79 return false; 80 } 81 BytecodePosition bcpos = call.debugInfo.getBytecodePosition(); 82 ResolvedJavaMethod method = bcpos.getMethod(); 83 // If bytecode position indicates a special value (negative value) it is 84 // not a normal java call 85 if (bcpos.getBCI() < 0) { 86 return false; 87 } 88 // If there is no method associated with the debuginfo, return false 89 if (method == null) { 90 return false; 91 } 92 assert (method instanceof HotSpotResolvedJavaMethod) : "Not a resolved Java call"; 93 return true; 94 } 95 96 private static byte getByteCode(Call call) { 97 ResolvedJavaMethod m = call.debugInfo.getBytecodePosition().getMethod(); 98 int callPosition = call.debugInfo.getBytecodePosition().getBCI(); 99 byte[] code = m.getCode(); 100 return code[callPosition]; 101 } 102 103} 104