111ecdbaf5
8210375: StackWalker::getCallerClass throws UnsupportedOperationException Reviewed-by: coleenp, dfuchs, bchristi
91 lines
3.9 KiB
Java
91 lines
3.9 KiB
Java
/*
|
|
* Copyright (c) 2016, 2023, 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
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
import java.lang.reflect.Field;
|
|
import java.lang.reflect.Method;
|
|
import java.util.List;
|
|
import java.util.Set;
|
|
import java.util.stream.Collectors;
|
|
import java.lang.StackWalker.StackFrame;
|
|
|
|
public class LocalLongHelper {
|
|
static StackWalker sw;
|
|
static Method longValue;
|
|
static Method getLocals;
|
|
static Class<?> primitiveValueClass;
|
|
static Method primitiveSize;
|
|
static Method getMethodType;
|
|
static Field classOrMemberName;
|
|
static Field offset;
|
|
|
|
public static void main(String[] args) throws Throwable {
|
|
setupReflectionStatics();
|
|
new LocalLongHelper().longArg(0xC0FFEE, 0x1234567890ABCDEFL);
|
|
}
|
|
|
|
// locals[2] contains the unused slot of the long argument.
|
|
public long longArg(int i, long l) throws Throwable {
|
|
List<StackFrame> frames = sw.walk(s -> s.collect(Collectors.toList()));
|
|
Object[] locals = (Object[]) getLocals.invoke(frames.get(0));
|
|
|
|
if (8 == (int) primitiveSize.invoke(locals[2])) { // Only test 64-bit
|
|
long locals_2 = (long) longValue.invoke(locals[2]);
|
|
if (locals_2 != 0){
|
|
throw new RuntimeException("Expected locals_2 == 0");
|
|
}
|
|
}
|
|
return l; // Don't want l to become a dead var
|
|
}
|
|
|
|
private static void setupReflectionStatics() throws Throwable {
|
|
Class<?> liveStackFrameClass = Class.forName("java.lang.LiveStackFrame");
|
|
primitiveValueClass = Class.forName("java.lang.LiveStackFrame$PrimitiveSlot");
|
|
|
|
getLocals = liveStackFrameClass.getDeclaredMethod("getLocals");
|
|
getLocals.setAccessible(true);
|
|
|
|
longValue = primitiveValueClass.getDeclaredMethod("longValue");
|
|
longValue.setAccessible(true);
|
|
|
|
Class<?> classFrameInfoClass = Class.forName("java.lang.ClassFrameInfo");
|
|
classOrMemberName = classFrameInfoClass.getDeclaredField("classOrMemberName");
|
|
classOrMemberName.setAccessible(true);
|
|
Class<?> stackFrameInfoClass = Class.forName("java.lang.StackFrameInfo");
|
|
offset = stackFrameInfoClass.getDeclaredField("bci");
|
|
offset.setAccessible(true);
|
|
getMethodType = Class.forName("java.lang.invoke.MemberName").getDeclaredMethod("getMethodType");
|
|
getMethodType.setAccessible(true);
|
|
|
|
Class<?> extendedOptionClass = Class.forName("java.lang.StackWalker$ExtendedOption");
|
|
Method ewsNI = StackWalker.class.getDeclaredMethod("newInstance", Set.class, extendedOptionClass);
|
|
ewsNI.setAccessible(true);
|
|
Field f = extendedOptionClass.getDeclaredField("LOCALS_AND_OPERANDS");
|
|
f.setAccessible(true);
|
|
Object localsAndOperandsOption = f.get(null);
|
|
|
|
primitiveSize = primitiveValueClass.getDeclaredMethod("size");
|
|
primitiveSize.setAccessible(true);
|
|
sw = (StackWalker) ewsNI.invoke(null, java.util.Collections.emptySet(), localsAndOperandsOption);
|
|
}
|
|
}
|