Mercurial > hg > graal-compiler
diff test/testlibrary_tests/whitebox/vm_flags/VmFlagTest.java @ 20249:0c48231c5c84
8038756: new WB API :: get/setVMFlag
Reviewed-by: vlivanov, sla
author | iignatyev |
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date | Fri, 30 May 2014 17:20:48 +0400 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/testlibrary_tests/whitebox/vm_flags/VmFlagTest.java Fri May 30 17:20:48 2014 +0400 @@ -0,0 +1,115 @@ +/* + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +import java.util.Objects; +import java.util.function.BiConsumer; +import java.util.function.Function; +import sun.hotspot.WhiteBox; +import sun.management.*; +import com.sun.management.*; +import com.oracle.java.testlibrary.*; + +public final class VmFlagTest<T> { + public static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); + + private static final String NONEXISTENT_FLAG = "NonexistentFlag"; + private final String flagName; + private final BiConsumer<T, T> test; + private final BiConsumer<String, T> set; + private final Function<String, T> get; + + protected VmFlagTest(String flagName, BiConsumer<String, T> set, + Function<String, T> get, boolean isPositive) { + this.flagName = flagName; + this.set = set; + this.get = get; + if (isPositive) { + test = this::testPositive; + } else { + test = this::testNegative; + } + } + + private void setNewValue(T value) { + set.accept(flagName, value); + } + + private T getValue() { + T t = get.apply(flagName); + System.out.println("T = " + t); + return t; + } + + protected static <T> void runTest(String existentFlag, T[] tests, + BiConsumer<String, T> set, Function<String, T> get) { + runTest(existentFlag, tests, tests, set, get); + } + + protected static <T> void runTest(String existentFlag, T[] tests, + T[] results, BiConsumer<String, T> set, Function<String, T> get) { + if (existentFlag != null) { + new VmFlagTest(existentFlag, set, get, true).test(tests, results); + } + new VmFlagTest(NONEXISTENT_FLAG, set, get, false).test(tests, results); + } + + public final void test(T[] tests, T[] results) { + Asserts.assertEQ(tests.length, results.length, "[TESTBUG] tests.length != results.length"); + for (int i = 0, n = tests.length ; i < n; ++i) { + test.accept(tests[i], results[i]); + } + } + + protected String getVMOptionAsString() { + HotSpotDiagnosticMXBean diagnostic + = ManagementFactoryHelper.getDiagnosticMXBean(); + VMOption tmp; + try { + tmp = diagnostic.getVMOption(flagName); + } catch (IllegalArgumentException e) { + tmp = null; + } + return tmp == null ? null : tmp.getValue(); + } + + private void testPositive(T value, T expected) { + Asserts.assertEQ(getVMOptionAsString(), asString(getValue())); + setNewValue(value); + String newValue = getVMOptionAsString(); + Asserts.assertEQ(newValue, asString(expected)); + Asserts.assertEQ(getVMOptionAsString(), asString(getValue())); + } + + private void testNegative(T value, T expected) { + String oldValue = getVMOptionAsString(); + Asserts.assertEQ(oldValue, asString(getValue())); + setNewValue(value); + String newValue = getVMOptionAsString(); + Asserts.assertEQ(oldValue, newValue); + } + + private String asString(Object value) { + return value == null ? null : "" + value; + } +} +