1 /*
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  7  * published by the Free Software Foundation.
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 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
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 18  *
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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 }
--- EOF ---