/*
* 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 ) .
*
* 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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*/
/*
* @ 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 TestClassLoaderFindNative
*/
import java.lang.foreign.MemorySegment;
import java.lang.foreign.SegmentScope;
import java.lang.foreign.SymbolLookup;
import java.lang.foreign.ValueLayout;
import org.testng.annotations.Test;
import static java.lang.foreign.ValueLayout.JAVA_BYTE;
import static org.testng.Assert .*;
// FYI this test is run on 64-bit platforms only for now,
// since the windows 32-bit linker fails and there
// is some fallback behaviour to use the 64-bit linker,
// where cygwin gets in the way and we accidentally pick up its
// link.exe
public class TestClassLoaderFindNative {
static {
System.loadLibrary("LookupTest" );
}
@Test
public void testSimpleLookup() {
assertFalse(SymbolLookup.loaderLookup().find("f" ).isEmpty());
}
@Test
public void testInvalidSymbolLookup() {
assertTrue(SymbolLookup.loaderLookup().find("nonExistent" ).isEmpty());
}
@Test
public void testVariableSymbolLookup() {
MemorySegment segment = MemorySegment.ofAddress(
SymbolLookup.loaderLookup().find("c" ).get().address(),
ValueLayout.JAVA_INT.byteSize(),
SegmentScope.global());
assertEquals(segment.get(JAVA_BYTE, 0 ), 42 );
}
}
Messung V0.5 in Prozent C=95 H=84 G=89
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-06-10)
¤
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