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108 lines
3.8 KiB
Java
108 lines
3.8 KiB
Java
/*
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* Copyright (c) 2018, Google LLC. All rights reserved.
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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 8211138 8362885
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* @summary Missing Flag enum constants
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* @library /tools/javac/lib
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* @modules jdk.compiler/com.sun.tools.javac.code
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* @compile FlagsTest.java
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* @run main/manual FlagsTest
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*/
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import com.sun.tools.javac.code.Flags;
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import com.sun.tools.javac.code.Flags.FlagTarget;
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import com.sun.tools.javac.code.Flags.NotFlag;
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import com.sun.tools.javac.code.Flags.Use;
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import java.lang.reflect.Field;
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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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public class FlagsTest {
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private static final int U2_SIZE = 16;
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public static void main(String[] args) throws Throwable {
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findFreeFlags();
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}
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private static void findFreeFlags() throws Throwable {
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Map<FlagTarget, Map<Long, List<Field>>> target2Flag2Fields = computeTarget2Flag2Fields();
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for (FlagTarget target : FlagTarget.values()) {
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long freeFlags = ~collectFlags(target2Flag2Fields, target);
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printFreeFlags(target.name(), freeFlags);
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}
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}
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private static Map<FlagTarget, Map<Long, List<Field>>> computeTarget2Flag2Fields() throws Throwable {
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Map<FlagTarget, Map<Long, List<Field>>> target2Flag2Fields = new HashMap<>();
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for (Field f : Flags.class.getFields()) {
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if (f.isAnnotationPresent(NotFlag.class)) {
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continue;
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}
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Use use = f.getAnnotation(Use.class);
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if (use == null) {
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throw new AssertionError("No @Use and no @NotFlag for: " + f.getName());
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}
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long flagValue = ((Number) f.get(null)).longValue();
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for (FlagTarget target : use.value()) {
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target2Flag2Fields.computeIfAbsent(target, _ -> new HashMap<>())
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.computeIfAbsent(flagValue, _ -> new ArrayList<>())
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.add(f);
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}
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}
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return target2Flag2Fields;
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}
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private static void printFreeFlags(String comment, long freeFlags) {
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System.err.print("free flags for " + comment + ": ");
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for (int bit = U2_SIZE; bit < Long.SIZE; bit++) { //lowest 16 bits are used in classfiles, never suggest adding anything there
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if ((freeFlags & (1L << bit)) != 0) {
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System.err.print("1L<<" + bit + " ");
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}
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}
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System.err.println();
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}
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private static long collectFlags(Map<FlagTarget, Map<Long, List<Field>>> target2Flag2Fields, FlagTarget... forTargets) {
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long flags = 0;
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for (FlagTarget target : forTargets) {
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for (long used : target2Flag2Fields.get(target).keySet()) {
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flags |= used;
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}
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}
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return flags;
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}
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}
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