/*
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* 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 .
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import java.lang.foreign.Arena;
import java.lang.foreign.Linker;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.MemorySegment;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
public class ThrowingUpcall extends NativeTestHelper {
private static final MethodHandle downcallVoid;
private static final MethodHandle downcallNonVoid;
public static final MethodHandle MH_throwException;
static {
System.loadLibrary("TestUpcall" );
downcallVoid = Linker.nativeLinker().downcallHandle(
findNativeOrThrow("f0_V__" ),
FunctionDescriptor.ofVoid(C_POINTER)
);
downcallNonVoid = Linker.nativeLinker().downcallHandle(
findNativeOrThrow("f10_I_I_" ),
FunctionDescriptor.of(C_INT, C_INT, C_POINTER)
);
try {
MH_throwException = MethodHandles.lookup().findStatic(ThrowingUpcall.class , "throwException" ,
MethodType.methodType(void .class ));
} catch (ReflectiveOperationException e) {
throw new ExceptionInInitializerError(e);
}
}
public static void throwException() throws Throwable {
throw new Throwable("Testing upcall exceptions" );
}
public static void main(String[] args) throws Throwable {
if (args[0 ].equals("void" )) {
testVoid();
} else {
testNonVoid();
}
}
public static void testVoid() throws Throwable {
MethodHandle handle = MH_throwException;
MethodHandle invoker = MethodHandles.exactInvoker(MethodType.methodType(void .class ));
handle = MethodHandles.insertArguments(invoker, 0 , handle);
try (Arena arena = Arena.openConfined()) {
MemorySegment stub = Linker.nativeLinker().upcallStub(handle, FunctionDescriptor.ofVoid(), arena.scope());
downcallVoid.invoke(stub); // should call Shutdown.exit(1);
}
}
public static void testNonVoid() throws Throwable {
MethodHandle handle = MethodHandles.identity(int .class );
handle = MethodHandles.collectArguments(handle, 0 , MH_throwException);
MethodHandle invoker = MethodHandles.exactInvoker(MethodType.methodType(int .class , int .class ));
handle = MethodHandles.insertArguments(invoker, 0 , handle);
try (Arena arena = Arena.openConfined()) {
MemorySegment stub = Linker.nativeLinker().upcallStub(handle, FunctionDescriptor.of(C_INT, C_INT), arena.scope());
downcallNonVoid.invoke(42 , stub); // should call Shutdown.exit(1);
}
}
}
Messung V0.5 in Prozent C=94 H=84 G=88
¤ Dauer der Verarbeitung: 0.1 Sekunden
(vorverarbeitet am 2026-06-10)
¤
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