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/*
* Copyright (c) 2020, 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/native
* --enable-native-access=ALL-UNNAMED
* -Djdk.internal.foreign.DowncallLinker.USE_SPEC=false
* TestUpcallStructScope
* @run testng/othervm/native
* --enable-native-access=ALL-UNNAMED
* -Djdk.internal.foreign.DowncallLinker.USE_SPEC=true
* TestUpcallStructScope
*/
import java.lang.foreign.*;
import org.testng.annotations.Test;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Consumer;
import static org.testng.Assert.assertFalse;
public class TestUpcallStructScope extends NativeTestHelper {
static final MethodHandle MH_do_upcall;
static final Linker LINKER = Linker.nativeLinker();
static final MethodHandle MH_Consumer_accept;
// struct S_PDI { void* p0; double p1; int p2; };
static final MemoryLayout S_PDI_LAYOUT = MemoryLayout.structLayout(
C_POINTER.withName("p0"),
C_DOUBLE.withName("p1"),
C_INT.withName("p2"),
MemoryLayout.paddingLayout(4)
);
static {
System.loadLibrary("TestUpcallStructScope");
MH_do_upcall = LINKER.downcallHandle(
findNativeOrThrow("do_upcall"),
FunctionDescriptor.ofVoid(C_POINTER, S_PDI_LAYOUT)
);
try {
MH_Consumer_accept = MethodHandles.publicLookup().findVirtual(Consumer.class, "accept",
MethodType.methodType(void.class, Object.class));
} catch (NoSuchMethodException | IllegalAccessException e) {
throw new RuntimeException(e);
}
}
private static MethodHandle methodHandle (Consumer<MemorySegment> callback) {
return MH_Consumer_accept.bindTo(callback).asType(MethodType.methodType(void.class, MemorySegment.class));
}
@Test
public void testUpcall() throws Throwable {
AtomicReference<MemorySegment> capturedSegment = new AtomicReference<>();
MethodHandle target = methodHandle(capturedSegment::set);
FunctionDescriptor upcallDesc = FunctionDescriptor.ofVoid(S_PDI_LAYOUT);
try (Arena arena = Arena.ofConfined()) {
MemorySegment upcallStub = LINKER.upcallStub(target, upcallDesc, arena);
MemorySegment argSegment = arena.allocate(S_PDI_LAYOUT);
MH_do_upcall.invoke(upcallStub, argSegment);
}
MemorySegment captured = capturedSegment.get();
assertFalse(captured.scope().isAlive());
}
}
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