1 /*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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24
25 /**
26 * @test
27 * @bug 8291360 8293448
28 * @summary Test getting a class's raw access flags using java.lang.Class API
29 * @modules java.base/java.lang:open
30 * @enablePreview
31 * @compile classAccessFlagsRaw.jcod
32 * @run main/othervm ClassAccessFlagsRawTest
33 */
34
35 import java.lang.classfile.ClassFile;
36 import java.lang.reflect.*;
37 import java.util.Set;
38
39 public class ClassAccessFlagsRawTest {
40
41 static Method m;
42
43 public static void testIt(String className, int expectedResult) throws Exception {
44 Class<?> testClass = Class.forName(className);
45 int flags = (int)m.invoke(testClass);
46 if (flags != expectedResult) {
47 throw new RuntimeException(
48 "expected 0x" + Integer.toHexString(expectedResult) + ", got 0x" + Integer.toHexString(flags) + " for class " + className);
49 }
50 }
51
52 public static void main(String argv[]) throws Throwable {
53 Class<?> cl = java.lang.Class.class;
54 m = cl.getDeclaredMethod("getClassFileAccessFlags", new Class[0]);
55 m.setAccessible(true);
56
57 testIt("SUPERset", Modifier.PUBLIC | ClassFile.ACC_IDENTITY);
58 // Because of the repurposing of ACC_SUPER into ACC_IDENTITY by JEP 401, the VM now fixes missing ACC_IDENTITY flags in old class files
59 testIt("SUPERnotset", Modifier.PUBLIC | ClassFile.ACC_IDENTITY);
60
61 // Test that primitive should return ACC_ABSTRACT | ACC_FINAL | ACC_PUBLIC.
62 int[] arr = new int[3];
63 if (!arr.getClass().getComponentType().isPrimitive()) {
64 throw new RuntimeException("not primitive");
65 }
66 int flags = (int)m.invoke(arr.getClass().getComponentType());
67 if (flags != (Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC)) {
68 throw new RuntimeException(
69 "expected 0x411, got 0x" + Integer.toHexString(flags) + " for primitive type");
70 }
71
72 // Test that primitive array raw access flags return 0.
73 flags = (int)m.invoke(arr.getClass());
74 if (flags != 0) {
75 throw new RuntimeException(
76 "expected 0x0 got 0x" + Integer.toHexString(flags) + " for primitive array");
77 }
78
79 // Test that the modifier flags return element type flags.
80 flags = (int)arr.getClass().getModifiers();
81 if (flags != (Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC | ClassFile.ACC_IDENTITY)) {
82 throw new RuntimeException(
83 "expected 0x431, got 0x" + Integer.toHexString(flags) + " for primitive type");
84 }
85
86 // Test that AccessFlags set will return element type access flags.
87 Set<AccessFlag> aacc = arr.getClass().accessFlags();
88 if (!aacc.containsAll(Set.of(AccessFlag.FINAL, AccessFlag.ABSTRACT, AccessFlag.PUBLIC))) {
89 throw new RuntimeException(
90 "AccessFlags should contain FINAL, ABSTRACT and PUBLIC for primitive type");
91 }
92
93 // Test object array. Raw access flags are 0 for arrays.
94 flags = (int)m.invoke((new SUPERnotset[2]).getClass());
95 if (flags != 0) {
96 throw new RuntimeException(
97 "expected 0x0, got 0x" + Integer.toHexString(flags) + " for object array");
98 }
99
100 // Test object array component type.
101 flags = (int)m.invoke((new SUPERnotset[2]).getClass().getComponentType());
102 // Because of the repurposing of ACC_SUPER into ACC_IDENTITY by JEP 401, the VM now fixes missing ACC_IDENTITY flags in old class files
103 if (flags != (Modifier.PUBLIC | ClassFile.ACC_IDENTITY)) {
104 throw new RuntimeException(
105 "expected 0x1, got 0x" + Integer.toHexString(flags) + " for object array");
106 }
107
108 // test multi-dimensional object array. should return flags of component.
109 flags = (int)m.invoke((new SUPERnotset[4][2]).getClass());
110 if (flags != 0) {
111 throw new RuntimeException(
112 "expected 0x0, got 0x" + Integer.toHexString(flags) + " for object array");
113 }
114 }
115 }