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