/*
* 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
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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
* - - enable - native - access = ALL - UNNAMED
* TestNULLAddress
*/
import org.testng.annotations.Test;
import java.lang.foreign.Linker;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.MemorySegment;
import java.lang.foreign.SymbolLookup;
import java.lang.foreign.ValueLayout;
import java.lang.invoke.MethodHandle;
import static org.testng.Assert .*;
public class TestNULLAddress {
static {
System.loadLibrary("Null" );
}
static final Linker LINKER = Linker.nativeLinker();
@Test(expectedExceptions = IllegalArgumentException.class )
public void testNULLLinking() {
LINKER.downcallHandle(
MemorySegment.NULL ,
FunctionDescriptor.ofVoid());
}
@Test(expectedExceptions = IllegalArgumentException.class )
public void testNULLVirtual() throws Throwable {
MethodHandle mh = LINKER.downcallHandle(
FunctionDescriptor.ofVoid());
mh.invokeExact(MemorySegment.NULL );
}
@Test
public void testNULLReturn_unbounded() throws Throwable {
MethodHandle mh = LINKER.downcallHandle(SymbolLookup.loaderLookup().find("get_null" ).get(),
FunctionDescriptor.of(ValueLayout.ADDRESS.asUnbounded()));
MemorySegment ret = (MemorySegment)mh.invokeExact();
assertTrue(ret.equals(MemorySegment.NULL ));
}
@Test
public void testNULLReturn_plain() throws Throwable {
MethodHandle mh = LINKER.downcallHandle(SymbolLookup.loaderLookup().find("get_null" ).get(),
FunctionDescriptor.of(ValueLayout.ADDRESS));
MemorySegment ret = (MemorySegment)mh.invokeExact();
assertTrue(ret.equals(MemorySegment.NULL ));
}
}
Messung V0.5 in Prozent C=99 H=97 G=97
¤ Dauer der Verarbeitung: 0.13 Sekunden
(vorverarbeitet am 2026-09-29)
¤
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