132 lines
6.9 KiB
Java
132 lines
6.9 KiB
Java
/*
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* Copyright (c) 2021, 2022, 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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/*
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* @test
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* @enablePreview
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* @requires ((os.arch == "amd64" | os.arch == "x86_64") & sun.arch.data.model == "64") | os.arch == "aarch64"
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* @run testng/othervm --enable-native-access=ALL-UNNAMED TestHeapAlignment
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*/
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import java.lang.foreign.MemoryAddress;
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import java.lang.foreign.MemoryLayout;
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import java.lang.foreign.MemorySegment;
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import java.lang.foreign.MemorySession;
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import java.lang.foreign.ValueLayout;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.function.Function;
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import org.testng.annotations.DataProvider;
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import org.testng.annotations.Test;
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import static org.testng.Assert.fail;
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public class TestHeapAlignment {
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@Test(dataProvider = "layouts")
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public void testHeapAlignment(MemorySegment segment, int align, Object val, Object arr, ValueLayout layout, Function<Object, MemorySegment> segmentFactory) {
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assertAligned(align, layout, () -> layout.varHandle().get(segment));
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assertAligned(align, layout, () -> layout.varHandle().set(segment, val));
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MemoryLayout seq = MemoryLayout.sequenceLayout(10, layout);
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assertAligned(align, layout, () -> seq.varHandle(MemoryLayout.PathElement.sequenceElement()).get(segment, 0L));
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assertAligned(align, layout, () -> seq.varHandle(MemoryLayout.PathElement.sequenceElement()).set(segment, 0L, val));
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assertAligned(align, layout, () -> segment.spliterator(layout));
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if (arr != null) {
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assertAligned(align, layout, () -> MemorySegment.copy(arr, 0, segment, layout, 0, 1));
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assertAligned(align, layout, () -> MemorySegment.copy(segment, layout, 0, arr, 0, 1));
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assertAligned(align, layout, () -> {
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MemorySegment other = segmentFactory.apply(arr);
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MemorySegment.copy(other, layout, 0, segment, layout, 0, 1);
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});
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MemorySegment other = segmentFactory.apply(arr);
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assertAligned(align, layout, () -> {
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MemorySegment.copy(segment, layout, 0, other, layout, 0, 1);
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});
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assertAligned(align, layout, () -> {
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MemorySegment.copy(other, layout, 0, segment, layout, 0, 1);
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});
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}
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}
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static void assertAligned(int align, ValueLayout layout, Runnable runnable) {
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boolean shouldFail = layout.byteAlignment() > align && align != -1;
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try {
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runnable.run();
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if (shouldFail) {
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fail("Should not get here!");
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}
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} catch (IllegalArgumentException ex) {
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if (!shouldFail) {
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fail("Should not get here!");
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} else if (!ex.getMessage().contains("alignment") && !ex.getMessage().contains("Misaligned")) {
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fail("Unexpected exception: " + ex);
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}
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}
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}
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static final ValueLayout.OfChar JAVA_CHAR_ALIGNED = ValueLayout.JAVA_CHAR.withBitAlignment(16);
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static final ValueLayout.OfShort JAVA_SHORT_ALIGNED = ValueLayout.JAVA_SHORT.withBitAlignment(16);
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static final ValueLayout.OfInt JAVA_INT_ALIGNED = ValueLayout.JAVA_INT.withBitAlignment(32);
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static final ValueLayout.OfFloat JAVA_FLOAT_ALIGNED = ValueLayout.JAVA_FLOAT.withBitAlignment(32);
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static final ValueLayout.OfLong JAVA_LONG_ALIGNED = ValueLayout.JAVA_LONG.withBitAlignment(64);
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static final ValueLayout.OfDouble JAVA_DOUBLE_ALIGNED = ValueLayout.JAVA_DOUBLE.withBitAlignment(64);
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static final ValueLayout.OfAddress ADDRESS_ALIGNED = ValueLayout.ADDRESS.withBitAlignment(ValueLayout.ADDRESS.bitSize());
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enum SegmentAndAlignment {
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HEAP_BYTE(MemorySegment.ofArray(new byte[8]), 1),
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HEAP_SHORT(MemorySegment.ofArray(new short[4]), 2),
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HEAP_CHAR(MemorySegment.ofArray(new char[4]), 2),
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HEAP_INT(MemorySegment.ofArray(new int[2]), 4),
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HEAP_FLOAT(MemorySegment.ofArray(new float[2]), 4),
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HEAP_LONG(MemorySegment.ofArray(new long[1]), 8),
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HEAP_DOUBLE(MemorySegment.ofArray(new double[1]), 8),
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NATIVE(MemorySegment.allocateNative(8, MemorySession.openImplicit()), -1);
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final MemorySegment segment;
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final int align;
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SegmentAndAlignment(MemorySegment segment, int align) {
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this.segment = segment;
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this.align = align;
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}
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}
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@DataProvider
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public static Object[][] layouts() {
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List<Object[]> layouts = new ArrayList<>();
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for (SegmentAndAlignment testCase : SegmentAndAlignment.values()) {
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layouts.add(new Object[] { testCase.segment, testCase.align, (byte) 42, new byte[]{42}, ValueLayout.JAVA_BYTE, (Function<byte[], MemorySegment>)MemorySegment::ofArray });
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layouts.add(new Object[] { testCase.segment, testCase.align, true, null, ValueLayout.JAVA_BOOLEAN, null });
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layouts.add(new Object[] { testCase.segment, testCase.align, (char) 42, new char[]{42}, JAVA_CHAR_ALIGNED, (Function<char[], MemorySegment>)MemorySegment::ofArray });
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layouts.add(new Object[] { testCase.segment, testCase.align, (short) 42, new short[]{42}, JAVA_SHORT_ALIGNED, (Function<short[], MemorySegment>)MemorySegment::ofArray });
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layouts.add(new Object[] { testCase.segment, testCase.align, 42, new int[]{42}, JAVA_INT_ALIGNED, (Function<int[], MemorySegment>)MemorySegment::ofArray });
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layouts.add(new Object[] { testCase.segment, testCase.align, 42f, new float[]{42}, JAVA_FLOAT_ALIGNED, (Function<float[], MemorySegment>)MemorySegment::ofArray });
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layouts.add(new Object[] { testCase.segment, testCase.align, 42L, new long[]{42}, JAVA_LONG_ALIGNED, (Function<long[], MemorySegment>)MemorySegment::ofArray });
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layouts.add(new Object[] { testCase.segment, testCase.align, 42d, new double[]{42}, JAVA_DOUBLE_ALIGNED, (Function<double[], MemorySegment>)MemorySegment::ofArray });
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layouts.add(new Object[] { testCase.segment, testCase.align, MemoryAddress.ofLong(42), null, ADDRESS_ALIGNED, null });
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}
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return layouts.toArray(new Object[0][]);
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}
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}
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