/*
* Copyright ( c ) 2012 , 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
* @ bug 7196190
* @ summary Improve method of handling MethodHandles
*
* @ run main / othervm / policy = jtreg . security . policy / secure = java . lang . SecurityManager GetUnsafeTest
*/
import java.lang.invoke.*;
import java.lang.reflect.Method;
import java.util.Arrays;
public class GetUnsafeTest {
static final String NAME = "sun.misc.Unsafe" ;
private static boolean isTestFailed = false ;
private static void fail() {
isTestFailed = true ;
try { throw new Exception(); } catch (Throwable e) {
StackTraceElement frame = e.getStackTrace()[1 ];
System.out.printf("Failed at %s:%d\n" , frame.getFileName(), frame.getLineNumber());
}
}
public static void main(String[] args) throws Throwable {
{
final MethodType mt = MethodType.methodType(Class .class , String.class );
final MethodHandle mh = MethodHandles.lookup()
.findStatic(Class .class , "forName" , mt);
try { Class .forName(NAME); fail(); } catch (Throwable e) {}
try { mh.invoke(NAME); fail(); } catch (Throwable e) {}
try { mh.bindTo(NAME).invoke(); fail(); } catch (Throwable e) {}
try { mh.invokeWithArguments(Arrays.asList(NAME)); fail(); } catch (Throwable e) {}
try { mh.invokeWithArguments(NAME); fail(); } catch (Throwable e) {}
try { Class cls = (Class ) mh.invokeExact(NAME); fail(); } catch (Throwable e) {}
}
{
final Method fnMethod = Class .class .getMethod("forName" , String.class );
final MethodType mt = MethodType.methodType(Object.class , Object.class , Object[].class );
final MethodHandle mh = MethodHandles.lookup()
.findVirtual(Method.class , "invoke" , mt)
.bindTo(fnMethod);
try { fnMethod.invoke(null , NAME); fail(); } catch (Throwable e) {}
try { mh.bindTo(null ).bindTo(new Object[]{NAME}).invoke(); fail(); } catch (Throwable e) {}
try { mh.invoke(null , new Object[]{NAME}); fail(); } catch (Throwable e) {}
try { mh.invokeWithArguments(null , new Object[]{NAME}); fail(); } catch (Throwable e) {}
try { mh.invokeWithArguments(Arrays.asList(null , new Object[]{NAME})); fail(); } catch (Throwable e) {}
try { Object obj = mh.invokeExact((Object) null , new Object[]{NAME}); fail(); } catch (Throwable e) {}
}
{
final Method fnMethod = Class .class .getMethod("forName" , String.class );
final MethodType mt = MethodType.methodType(Object.class , Object.class , Object[].class );
final MethodHandle mh = MethodHandles.lookup().bind(fnMethod, "invoke" , mt);
try { mh.bindTo(null ).bindTo(new Object[]{NAME}).invoke(); fail(); } catch (Throwable e) {}
try { mh.invoke(null , new Object[]{NAME}); fail(); } catch (Throwable e) {}
try { mh.invokeWithArguments(null , NAME); fail(); } catch (Throwable e) {}
try { mh.invokeWithArguments(Arrays.asList(null , NAME)); fail(); } catch (Throwable e) {}
try { Object obj = mh.invokeExact((Object) null , new Object[]{NAME}); fail(); } catch (Throwable e) {}
}
{
final Method fnMethod = Class .class .getMethod("forName" , String.class );
final MethodHandle mh = MethodHandles.lookup().unreflect(fnMethod);
try { mh.bindTo(NAME).invoke(); fail(); } catch (Throwable e) {}
try { mh.invoke(NAME); fail(); } catch (Throwable e) {}
try { mh.invokeWithArguments(NAME); fail(); } catch (Throwable e) {}
try { mh.invokeWithArguments(Arrays.asList(NAME)); fail(); } catch (Throwable e) {}
try { Class cls = (Class ) mh.invokeExact(NAME); fail(); } catch (Throwable e) {}
}
if (!isTestFailed) {
System.out.println("TEST PASSED" );
} else {
System.out.println("TEST FAILED" );
System.exit(1 );
}
}
}
Messung V0.5 in Prozent C=95 H=90 G=92
¤ Dauer der Verarbeitung: 0.6 Sekunden
¤
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