1 /*
  2  * Copyright (c) 2008, 2026, 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 id=NoPreview
 26  * @bug 4975569 6622215 8034861
 27  * @summary javap doesn't print new flag bits
 28  * @modules jdk.jdeps/com.sun.tools.javap
 29  * @modules java.base/jdk.internal.misc
 30  * @comment Ensure that that this test is skipped if the test is run on a preview enabled
 31             VM as the compiled test class has not been forced into preview mode.
 32             Valhalla affects the outcome.
 33  * @requires !java.enablePreview
 34  * @run main T4975569
 35  */
 36 
 37 /*
 38  * @test id=Preview
 39  * @bug 4975569 6622215 8034861
 40  * @summary javap doesn't print new flag bits - Preview
 41  * @modules jdk.jdeps/com.sun.tools.javap
 42  * @modules java.base/jdk.internal.misc
 43  * @enablePreview
 44  * @compile -XDforcePreview T4975569.java
 45  * @run main T4975569
 46  */
 47 
 48 import java.io.*;
 49 import java.util.*;
 50 import java.util.regex.Matcher;
 51 import java.util.regex.Pattern;
 52 
 53 import jdk.internal.misc.PreviewFeatures;
 54 
 55 public class T4975569 {
 56     private static final String NEW_LINE = System.getProperty("line.separator");
 57     private static final String TEST_CLASSES = System.getProperty("test.classes", ".");
 58 
 59     public static void main(String... args) {
 60         new T4975569().run();
 61     }
 62 
 63     T4975569() {
 64         System.currentTimeMillis();
 65         super(); // Trigger forced preview
 66     }
 67 
 68     void run() {
 69         verify(Anno.class.getName(), "flags: \\(0x2600\\) ACC_INTERFACE, ACC_ABSTRACT, ACC_ANNOTATION");
 70         verify(E.class.getName(), PreviewFeatures.isEnabled()
 71                 ? "flags: \\(0x4030\\) ACC_FINAL, ACC_IDENTITY, ACC_ENUM"
 72                 : "flags: \\(0x4030\\) ACC_FINAL, ACC_SUPER, ACC_ENUM");
 73         verify(S.class.getName(),    "flags: \\(0x1040\\) ACC_BRIDGE, ACC_SYNTHETIC",
 74                                      "InnerClasses:\n  static [# =\\w]+; +// ");
 75         verify(V.class.getName(),    "void m\\(java.lang.String...\\)",
 76                                      "flags: \\(0x0080\\) ACC_VARARGS");
 77         verify(Prot.class.getName(), "InnerClasses:\n  protected [# =\\w]+; +// ");
 78         verify(Priv.class.getName(), new String[]{"-p"},
 79                                      "InnerClasses:\n  private [# =\\w]+; +// ");
 80 
 81         if (errors > 0)
 82             throw new Error(errors + " found.");
 83     }
 84 
 85     void verify(String className, String[] flags, String... expects) {
 86         String output = javap(className, Arrays.asList(flags));
 87         for (String expect: expects) {
 88             Pattern expectPattern = Pattern.compile(expect);
 89             Matcher matcher = expectPattern.matcher(output);
 90             if (!matcher.find()) {
 91                 error(expect + " not found");
 92             }
 93         }
 94     }
 95 
 96     void verify(String className, String... expects) {
 97         verify(className, new String[0], expects);
 98     }
 99 
100     int errors;
101     void error(String msg) {
102         System.err.println(msg.replace("\n", NEW_LINE));
103         errors++;
104     }
105 
106     String javap(String className, List<String> flags) {
107         StringWriter sw = new StringWriter();
108         PrintWriter out = new PrintWriter(sw);
109         List<String> args = new ArrayList<>(flags);
110         args.addAll(Arrays.asList("-v", "-classpath", TEST_CLASSES, className));
111         int rc = com.sun.tools.javap.Main.run(args.toArray(new String[args.size()]), out);
112         out.close();
113         String output = sw.toString();
114         System.err.println("class " + className);
115         System.err.println(output);
116 
117         if (rc != 0)
118             throw new Error("javap failed. rc=" + rc);
119         return output.replaceAll(NEW_LINE, "\n");
120     }
121 
122     List x() { return null; }
123 
124     class V { void m(String... args) { } }
125     enum E { e }
126     @interface Anno { }
127     static class S extends T4975569 {
128         ArrayList x() { return null; }
129     }
130 
131     protected class Prot { }
132     private class Priv { int i; }
133 }
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