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 | import java.util.Arrays; |
jjg@46 | 30 | import java.util.HashMap; |
jjg@46 | 31 | import java.util.Iterator; |
jjg@46 | 32 | import java.util.Map; |
jjg@46 | 33 | |
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 Attributes implements Iterable<Attribute> { |
jjg@46 | 41 | Attributes(ClassReader cr) throws IOException { |
jjg@46 | 42 | map = new HashMap<String,Attribute>(); |
jjg@46 | 43 | int attrs_count = cr.readUnsignedShort(); |
jjg@46 | 44 | attrs = new Attribute[attrs_count]; |
jjg@46 | 45 | for (int i = 0; i < attrs_count; i++) { |
jjg@46 | 46 | Attribute attr = Attribute.read(cr); |
jjg@46 | 47 | attrs[i] = attr; |
jjg@46 | 48 | try { |
jjg@46 | 49 | map.put(attr.getName(cr.getConstantPool()), attr); |
jjg@46 | 50 | } catch (ConstantPoolException e) { |
jjg@46 | 51 | // don't enter invalid names in map |
jjg@46 | 52 | } |
jjg@46 | 53 | } |
jjg@46 | 54 | } |
jjg@46 | 55 | |
jjg@46 | 56 | public Attributes(ConstantPool constant_pool, Attribute[] attrs) { |
jjg@46 | 57 | this.attrs = attrs; |
jjg@46 | 58 | map = new HashMap<String,Attribute>(); |
jjg@46 | 59 | for (int i = 0; i < attrs.length; i++) { |
jjg@46 | 60 | Attribute attr = attrs[i]; |
jjg@46 | 61 | try { |
jjg@46 | 62 | map.put(attr.getName(constant_pool), attr); |
jjg@46 | 63 | } catch (ConstantPoolException e) { |
jjg@46 | 64 | // don't enter invalid names in map |
jjg@46 | 65 | } |
jjg@46 | 66 | } |
jjg@46 | 67 | } |
jjg@46 | 68 | |
jjg@46 | 69 | public Iterator<Attribute> iterator() { |
jjg@46 | 70 | return Arrays.asList(attrs).iterator(); |
jjg@46 | 71 | } |
jjg@46 | 72 | |
jjg@46 | 73 | public Attribute get(int index) { |
jjg@46 | 74 | return attrs[index]; |
jjg@46 | 75 | } |
jjg@46 | 76 | |
jjg@46 | 77 | public Attribute get(String name) { |
jjg@46 | 78 | return map.get(name); |
jjg@46 | 79 | } |
jjg@46 | 80 | |
jjg@67 | 81 | public int getIndex(ConstantPool constant_pool, String name) { |
jjg@67 | 82 | for (int i = 0; i < attrs.length; i++) { |
jjg@67 | 83 | Attribute attr = attrs[i]; |
jjg@67 | 84 | try { |
jjg@67 | 85 | if (attr != null && attr.getName(constant_pool).equals(name)) |
jjg@67 | 86 | return i; |
jjg@67 | 87 | } catch (ConstantPoolException e) { |
jjg@67 | 88 | // ignore invalid entries |
jjg@67 | 89 | } |
jjg@67 | 90 | } |
jjg@67 | 91 | return -1; |
jjg@67 | 92 | } |
jjg@67 | 93 | |
jjg@46 | 94 | public int size() { |
jjg@46 | 95 | return attrs.length; |
jjg@46 | 96 | } |
jjg@46 | 97 | |
jjg@345 | 98 | public int byteLength() { |
jjg@345 | 99 | int length = 2; |
jjg@345 | 100 | for (Attribute a: attrs) |
jjg@345 | 101 | length += a.byteLength(); |
jjg@345 | 102 | return length; |
jjg@345 | 103 | } |
jjg@345 | 104 | |
jjg@46 | 105 | public final Attribute[] attrs; |
jjg@46 | 106 | public final Map<String, Attribute> map; |
jjg@46 | 107 | } |