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| 1 | +/* |
| 2 | + * Copyright (c) 2022, 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 | + * @test |
| 26 | + * @bug 8280164 |
| 27 | + * @summary Check emission of Preload attribute |
| 28 | + * @modules jdk.jdeps/com.sun.tools.classfile |
| 29 | + * @compile MultiValues.java |
| 30 | + * @compile -g PreloadAttributeTest.java |
| 31 | + * @run main PreloadAttributeTest |
| 32 | + */ |
| 33 | + |
| 34 | +import com.sun.tools.classfile.*; |
| 35 | +import com.sun.tools.classfile.ConstantPool.CONSTANT_Class_info; |
| 36 | + |
| 37 | +public class PreloadAttributeTest { |
| 38 | + |
| 39 | + static final value class X { |
| 40 | + final V1 [] v1 = null; // field descriptor |
| 41 | + V2[] foo() { // method descriptor encoding value type |
| 42 | + return null; |
| 43 | + } |
| 44 | + void foo(V3 v3) { // method descriptor encoding value type |
| 45 | + } |
| 46 | + void foo(int x) { |
| 47 | + V4 [] v4 = null; // local variable. |
| 48 | + } |
| 49 | + void goo() { |
| 50 | + V5 [] v5 = null; |
| 51 | + if (v5 == null) { |
| 52 | + // ... |
| 53 | + } else { |
| 54 | + V5 [] v52 = null; |
| 55 | + } |
| 56 | + } |
| 57 | + } |
| 58 | + |
| 59 | + public static void main(String[] args) throws Exception { |
| 60 | + ClassFile cls = ClassFile.read(PreloadAttributeTest.class.getResourceAsStream("PreloadAttributeTest$X.class")); |
| 61 | + |
| 62 | + if (cls == null) { |
| 63 | + throw new AssertionError("Could not locate the class files"); |
| 64 | + } |
| 65 | + |
| 66 | + /* Check emission of Preload attribute */ |
| 67 | + Preload_attribute preloads = (Preload_attribute) cls.attributes.get(Attribute.Preload); |
| 68 | + if (preloads == null) { |
| 69 | + throw new AssertionError("Missing Preload attribute!"); |
| 70 | + } |
| 71 | + if (preloads.number_of_classes != 6) { |
| 72 | + throw new AssertionError("Incorrect number of Preload classes"); |
| 73 | + } |
| 74 | + |
| 75 | + int mask = 0x3F; |
| 76 | + for (int i = 0; i < preloads.number_of_classes; i++) { |
| 77 | + CONSTANT_Class_info clsInfo = cls.constant_pool.getClassInfo( |
| 78 | + preloads.value_class_info_index[i]); |
| 79 | + switch (clsInfo.getName()) { |
| 80 | + case "V1": |
| 81 | + mask &= ~1; break; |
| 82 | + case "V2": |
| 83 | + mask &= ~2; break; |
| 84 | + case "V3": |
| 85 | + mask &= ~4; break; |
| 86 | + case "V4": |
| 87 | + mask &= ~8; break; |
| 88 | + case "V5": |
| 89 | + mask &= ~16; break; |
| 90 | + case "PreloadAttributeTest$X": |
| 91 | + mask &= ~32; break; |
| 92 | + } |
| 93 | + } |
| 94 | + if (mask != 0) { |
| 95 | + throw new AssertionError("Some Preload class entries are missing!"); |
| 96 | + } |
| 97 | + } |
| 98 | +} |
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