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83 lines
3.0 KiB
Java
83 lines
3.0 KiB
Java
/*
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* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8361570
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* @summary Verify no flags in ExtendedStandardFlags have overlays for different
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* Symbol kinds.
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* @library /tools/lib
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* @modules jdk.compiler/com.sun.tools.javac.code
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* @compile ExtendedStandardFlagsOverlayFlagsConflict.java
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* @run main ExtendedStandardFlagsOverlayFlagsConflict
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*/
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import com.sun.tools.javac.code.Flags;
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import java.lang.reflect.Field;
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import java.lang.reflect.Modifier;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/* Flags in ExtendedStandardFlags are checked using masks, and if they have
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* Symbol-kind specific meaning, they can lead to confusing errors. Hence,
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* Flags in ExtendedStandardFlags should have the same meaning for all Symbols.
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*/
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public class ExtendedStandardFlagsOverlayFlagsConflict {
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public static void main(String... args) throws Exception {
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ExtendedStandardFlagsOverlayFlagsConflict t =
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new ExtendedStandardFlagsOverlayFlagsConflict();
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t.run();
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}
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public void run() throws Exception {
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Map<Long, List<Field>> value2FlagFields = new HashMap<>();
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for (Field f : Flags.class.getFields()) {
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if (!Modifier.isStatic(f.getModifiers())) {
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continue;
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}
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if (f.getName().startsWith("ACC_")) {
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continue;
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}
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long flag = ((Number) f.get(null)).longValue();
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value2FlagFields.computeIfAbsent(flag, _ -> new ArrayList<>())
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.add(f);
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}
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long pendingFlags2Check = Flags.ExtendedStandardFlags;
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while (pendingFlags2Check != 0) {
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long flag = Long.highestOneBit(pendingFlags2Check);
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List<Field> flagFields = value2FlagFields.get(flag);
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if (flagFields.size() != 1) {
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throw new AssertionError("Flag: " + flag +
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" has more than one flag field: " + flagFields);
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}
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pendingFlags2Check &= ~flag;
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}
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}
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}
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