Thu, 12 Jan 2012 15:28:34 +0000
7123100: javac fails with java.lang.StackOverflowError
Summary: Inference of under-constrained type-variables creates erroneous recursive wildcard types
Reviewed-by: jjg
jjg@46 | 1 | /* |
ohair@554 | 2 | * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved. |
jjg@46 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
jjg@46 | 4 | * |
jjg@46 | 5 | * This code is free software; you can redistribute it and/or modify it |
jjg@46 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
jjg@46 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
jjg@46 | 10 | * |
jjg@46 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jjg@46 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jjg@46 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jjg@46 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
jjg@46 | 15 | * accompanied this code). |
jjg@46 | 16 | * |
jjg@46 | 17 | * You should have received a copy of the GNU General Public License version |
jjg@46 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
jjg@46 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
jjg@46 | 20 | * |
ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@554 | 23 | * questions. |
jjg@46 | 24 | */ |
jjg@46 | 25 | |
jjg@46 | 26 | package com.sun.tools.classfile; |
jjg@46 | 27 | |
jjg@46 | 28 | import java.io.IOException; |
jjg@46 | 29 | |
jjg@46 | 30 | import com.sun.tools.classfile.ConstantPool.*; |
jjg@46 | 31 | |
jjg@46 | 32 | /** |
jjh@972 | 33 | * See JVMS, section 4.8.6. |
jjg@46 | 34 | * |
jjg@581 | 35 | * <p><b>This is NOT part of any supported API. |
jjg@581 | 36 | * If you write code that depends on this, you do so at your own risk. |
jjg@46 | 37 | * This code and its internal interfaces are subject to change or |
jjg@46 | 38 | * deletion without notice.</b> |
jjg@46 | 39 | */ |
jjg@46 | 40 | public class InnerClasses_attribute extends Attribute { |
jjg@46 | 41 | InnerClasses_attribute(ClassReader cr, int name_index, int length) throws IOException { |
jjg@46 | 42 | super(name_index, length); |
jjg@46 | 43 | number_of_classes = cr.readUnsignedShort(); |
jjg@46 | 44 | classes = new Info[number_of_classes]; |
jjg@46 | 45 | for (int i = 0; i < number_of_classes; i++) |
jjg@46 | 46 | classes[i] = new Info(cr); |
jjg@46 | 47 | } |
jjg@46 | 48 | |
jjg@46 | 49 | public InnerClasses_attribute(ConstantPool constant_pool, Info[] classes) |
jjg@46 | 50 | throws ConstantPoolException { |
jjg@46 | 51 | this(constant_pool.getUTF8Index(Attribute.InnerClasses), classes); |
jjg@46 | 52 | } |
jjg@46 | 53 | |
jjg@46 | 54 | public InnerClasses_attribute(int name_index, Info[] classes) { |
jjg@46 | 55 | super(name_index, 2 + Info.length() * classes.length); |
jjg@46 | 56 | this.number_of_classes = classes.length; |
jjg@46 | 57 | this.classes = classes; |
jjg@46 | 58 | } |
jjg@46 | 59 | |
jjg@46 | 60 | public <R, D> R accept(Visitor<R, D> visitor, D data) { |
jjg@46 | 61 | return visitor.visitInnerClasses(this, data); |
jjg@46 | 62 | } |
jjg@46 | 63 | |
jjg@46 | 64 | public final int number_of_classes; |
jjg@46 | 65 | public final Info[] classes; |
jjg@46 | 66 | |
jjg@46 | 67 | public static class Info { |
jjg@46 | 68 | Info(ClassReader cr) throws IOException { |
jjg@46 | 69 | inner_class_info_index = cr.readUnsignedShort(); |
jjg@46 | 70 | outer_class_info_index = cr.readUnsignedShort(); |
jjg@46 | 71 | inner_name_index = cr.readUnsignedShort(); |
jjg@46 | 72 | inner_class_access_flags = new AccessFlags(cr.readUnsignedShort()); |
jjg@46 | 73 | } |
jjg@46 | 74 | |
jjg@46 | 75 | public CONSTANT_Class_info getInnerClassInfo(ConstantPool constant_pool) throws ConstantPoolException { |
jjg@46 | 76 | if (inner_class_info_index == 0) |
jjg@46 | 77 | return null; |
jjg@46 | 78 | return constant_pool.getClassInfo(inner_class_info_index); |
jjg@46 | 79 | } |
jjg@46 | 80 | |
jjg@46 | 81 | public CONSTANT_Class_info getOuterClassInfo(ConstantPool constant_pool) throws ConstantPoolException { |
jjg@46 | 82 | if (outer_class_info_index == 0) |
jjg@46 | 83 | return null; |
jjg@46 | 84 | return constant_pool.getClassInfo(outer_class_info_index); |
jjg@46 | 85 | } |
jjg@46 | 86 | |
jjg@46 | 87 | public String getInnerName(ConstantPool constant_pool) throws ConstantPoolException { |
jjg@46 | 88 | if (inner_name_index == 0) |
jjg@46 | 89 | return null; |
jjg@46 | 90 | return constant_pool.getUTF8Value(inner_name_index); |
jjg@46 | 91 | } |
jjg@46 | 92 | |
jjg@46 | 93 | public static int length() { |
jjg@46 | 94 | return 8; |
jjg@46 | 95 | } |
jjg@46 | 96 | |
jjg@46 | 97 | public final int inner_class_info_index; |
jjg@46 | 98 | public final int outer_class_info_index; |
jjg@46 | 99 | public final int inner_name_index; |
jjg@46 | 100 | public final AccessFlags inner_class_access_flags; |
jjg@46 | 101 | } |
jjg@46 | 102 | } |