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/*
* Copyright (c) 2021, 2023, 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 jdk.foreign.linker != "UNSUPPORTED"
* @run testng/othervm --enable-native-access=ALL-UNNAMED TestHeapAlignment
*/
import java.lang.foreign.AddressLayout;
import java.lang.foreign.MemoryLayout;
import java.lang.foreign.MemorySegment;
import java.lang.foreign.Arena;
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<Object, MemorySegment> 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);
}
}
}
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(Arena.ofAuto().allocate(8, 1), -1);
final MemorySegment segment;
final int align;
SegmentAndAlignment(MemorySegment segment, int align) {
this.segment = segment;
this.align = align;
}
}
@DataProvider
public static Object[][] layouts() {
List<Object[]> 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<byte[], MemorySegment>)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}, ValueLayout.JAVA_CHAR, (Function<char[], MemorySegment>)MemorySegment::ofArray });
layouts.add(new Object[] { testCase.segment, testCase.align, (short) 42, new short[]{42}, ValueLayout.JAVA_SHORT, (Function<short[], MemorySegment>)MemorySegment::ofArray });
layouts.add(new Object[] { testCase.segment, testCase.align, 42, new int[]{42}, ValueLayout.JAVA_INT, (Function<int[], MemorySegment>)MemorySegment::ofArray });
layouts.add(new Object[] { testCase.segment, testCase.align, 42f, new float[]{42}, ValueLayout.JAVA_FLOAT, (Function<float[], MemorySegment>)MemorySegment::ofArray });
layouts.add(new Object[] { testCase.segment, testCase.align, 42L, new long[]{42}, ValueLayout.JAVA_LONG, (Function<long[], MemorySegment>)MemorySegment::ofArray });
layouts.add(new Object[] { testCase.segment, testCase.align, 42d, new double[]{42}, ValueLayout.JAVA_DOUBLE, (Function<double[], MemorySegment>)MemorySegment::ofArray });
layouts.add(new Object[] { testCase.segment, testCase.align, MemorySegment.ofAddress(42), null, ValueLayout.ADDRESS, null });
}
return layouts.toArray(new Object[0][]);
}
}
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