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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 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.reflect.*;
 36 import java.util.Set;
 37 
 38 public class ClassAccessFlagsRawTest {
 39 
 40     static Method m;
 41 
 42     public static void testIt(String className, int expectedResult) throws Exception {
 43         Class<?> testClass = Class.forName(className);
 44         int flags = (int)m.invoke(testClass);
 45         if (flags != expectedResult) {
 46             throw new RuntimeException(
 47                 "expected 0x" + Integer.toHexString(expectedResult) + ", got 0x" + Integer.toHexString(flags) + " for class " + className);
 48         }
 49     }
 50 
 51     public static void main(String argv[]) throws Throwable {
 52         Class<?> cl = java.lang.Class.class;
 53         m = cl.getDeclaredMethod("getClassFileAccessFlags", new Class[0]);
 54         m.setAccessible(true);
 55 
 56         testIt("SUPERset", Modifier.PUBLIC | Modifier.IDENTITY);
 57         // 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
 58         testIt("SUPERnotset", Modifier.PUBLIC | Modifier.IDENTITY);
 59 
 60         // Test that primitive should return ACC_ABSTRACT | ACC_FINAL | ACC_PUBLIC.
 61         int[] arr = new int[3];
 62         if (!arr.getClass().getComponentType().isPrimitive()) {
 63             throw new RuntimeException("not primitive");
 64         }
 65         int flags = (int)m.invoke(arr.getClass().getComponentType());
 66         if (flags != (Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC)) {
 67             throw new RuntimeException(
 68                 "expected 0x411, got 0x" + Integer.toHexString(flags) + " for primitive type");
 69         }
 70 
 71         // Test that primitive array raw access flags return 0.
 72         flags = (int)m.invoke(arr.getClass());
 73         if (flags != 0) {
 74             throw new RuntimeException(
 75                 "expected 0x0 got 0x" + Integer.toHexString(flags) + " for primitive array");
 76         }
 77 
 78         // Test that the modifier flags return element type flags.
 79         flags = (int)arr.getClass().getModifiers();
 80         if (flags != (Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC | Modifier.IDENTITY)) {
 81             throw new RuntimeException(
 82                 "expected 0x431, got 0x" + Integer.toHexString(flags) + " for primitive type");
 83         }
 84 
 85         // Test that AccessFlags set will return element type access flags.
 86         Set<AccessFlag> aacc = arr.getClass().accessFlags();
 87         if (!aacc.containsAll(Set.of(AccessFlag.FINAL, AccessFlag.ABSTRACT, AccessFlag.PUBLIC))) {
 88             throw new RuntimeException(
 89                 "AccessFlags should contain FINAL, ABSTRACT and PUBLIC for primitive type");
 90         }
 91 
 92         // Test object array.  Raw access flags are 0 for arrays.
 93         flags = (int)m.invoke((new SUPERnotset[2]).getClass());
 94         if (flags != 0) {
 95             throw new RuntimeException(
 96                 "expected 0x0, got 0x" + Integer.toHexString(flags) + " for object array");
 97         }
 98 
 99         // Test object array component type.
100         flags = (int)m.invoke((new SUPERnotset[2]).getClass().getComponentType());
101         // 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
102         if (flags != (Modifier.PUBLIC | Modifier.IDENTITY)) {
103             throw new RuntimeException(
104                 "expected 0x1, got 0x" + Integer.toHexString(flags) + " for object array");
105         }
106 
107         // test multi-dimensional object array.  should return flags of component.
108         flags = (int)m.invoke((new SUPERnotset[4][2]).getClass());
109         if (flags != 0) {
110             throw new RuntimeException(
111                 "expected 0x0, got 0x" + Integer.toHexString(flags) + " for object array");
112         }
113     }
114 }