1 /* 2 * Copyright (c) 2017, 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 package jdk.tools.jaotc; 25 26 public final class StubInformation { 27 private int stubOffset; // the offset inside the code (text + stubOffset) 28 private int stubSize; // the stub size 29 private int dispatchJumpOffset; // offset after main dispatch jump instruction 30 private int resolveJumpOffset; // offset after jump instruction to runtime call resolution function. 31 private int resolveJumpStart; // offset of jump instruction to VM runtime call resolution function. 32 private int c2iJumpOffset; // offset after jump instruction to c2i adapter for static calls. 33 private int movOffset; // offset after move instruction which loads from got cell: 34 // - Method* for static call 35 // - Klass* for virtual call 36 37 private boolean isVirtual; // virtual call stub 38 39 // maybe add type of stub as well, right now we only have static stubs 40 41 StubInformation(int stubOffset, boolean isVirtual) { 42 this.stubOffset = stubOffset; 43 this.isVirtual = isVirtual; 44 this.stubSize = -1; 45 this.movOffset = -1; 46 this.c2iJumpOffset = -1; 47 this.resolveJumpOffset = -1; 48 this.resolveJumpStart = -1; 49 this.dispatchJumpOffset = -1; 50 } 51 52 int getOffset() { 53 return stubOffset; 54 } 55 56 boolean isVirtual() { 57 return isVirtual; 58 } 59 60 public void setSize(int stubSize) { 61 this.stubSize = stubSize; 62 } 63 64 int getSize() { 65 return stubSize; 66 } 67 68 public void setMovOffset(int movOffset) { 69 this.movOffset = movOffset + stubOffset; 70 } 71 72 int getMovOffset() { 73 return movOffset; 74 } 75 76 public void setC2IJumpOffset(int c2iJumpOffset) { 77 this.c2iJumpOffset = c2iJumpOffset + stubOffset; 78 } 79 80 int getC2IJumpOffset() { 81 return c2iJumpOffset; 82 } 83 84 public void setResolveJumpOffset(int resolveJumpOffset) { 85 this.resolveJumpOffset = resolveJumpOffset + stubOffset; 86 } 87 88 int getResolveJumpOffset() { 89 return resolveJumpOffset; 90 } 91 92 public void setResolveJumpStart(int resolveJumpStart) { 93 this.resolveJumpStart = resolveJumpStart + stubOffset; 94 } 95 96 int getResolveJumpStart() { 97 return resolveJumpStart; 98 } 99 100 public void setDispatchJumpOffset(int dispatchJumpOffset) { 101 this.dispatchJumpOffset = dispatchJumpOffset + stubOffset; 102 } 103 104 int getDispatchJumpOffset() { 105 return dispatchJumpOffset; 106 } 107 108 void verify() { 109 assert stubOffset > 0 : "incorrect stubOffset: " + stubOffset; 110 assert stubSize > 0 : "incorrect stubSize: " + stubSize; 111 assert movOffset > 0 : "incorrect movOffset: " + movOffset; 112 assert dispatchJumpOffset > 0 : "incorrect dispatchJumpOffset: " + dispatchJumpOffset; 113 assert resolveJumpStart > 0 : "incorrect resolveJumpStart: " + resolveJumpStart; 114 assert resolveJumpOffset > 0 : "incorrect resolveJumpOffset: " + resolveJumpOffset; 115 if (!isVirtual) { 116 assert c2iJumpOffset > 0 : "incorrect c2iJumpOffset: " + c2iJumpOffset; 117 } 118 } 119 }