/*
* Copyright ( c ) 2020 , 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 ) .
*
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* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
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/*
* @ test
* @ enablePreview
* @ requires ( ( os . arch = = " amd64 " | os . arch = = " x86_64 " ) & sun . arch . data . model = = " 64 " ) | os . arch = = " aarch64 "
*
* @ run testng / othervm / native
* - - enable - native - access = ALL - UNNAMED
* - Djdk . internal . foreign . ProgrammableInvoker . USE_SPEC = false
* TestUpcallStructScope
* @ run testng / othervm / native
* - - enable - native - access = ALL - UNNAMED
* - Djdk . internal . foreign . ProgrammableInvoker . USE_SPEC = true
* TestUpcallStructScope
*/
import java.lang.foreign.Arena;
import java.lang.foreign.Linker;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.MemoryLayout;
import java.lang.foreign.MemorySegment;
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" )
);
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.openConfined()) {
MemorySegment upcallStub = LINKER.upcallStub(target, upcallDesc, arena.scope());
MemorySegment argSegment = MemorySegment.allocateNative(S_PDI_LAYOUT, arena.scope());;
MH_do_upcall.invoke(upcallStub, argSegment);
}
MemorySegment captured = capturedSegment.get();
assertFalse(captured.scope().isAlive());
}
}
Messung V0.5 in Prozent C=96 H=95 G=95
¤ Dauer der Verarbeitung: 0.17 Sekunden
(vorverarbeitet am 2026-09-29)
¤
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