85 lines
3.4 KiB
Java
85 lines
3.4 KiB
Java
/*
|
|
* Copyright (c) 2014, 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. Oracle designates this
|
|
* particular file as subject to the "Classpath" exception as provided
|
|
* by Oracle in the LICENSE file that accompanied this code.
|
|
*
|
|
* 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.
|
|
*/
|
|
package java.lang.invoke;
|
|
|
|
import java.lang.reflect.Method;
|
|
import java.util.Properties;
|
|
import sun.hotspot.WhiteBox;
|
|
|
|
public class StableConfiguration {
|
|
static final WhiteBox WB = WhiteBox.getWhiteBox();
|
|
static final boolean isStableEnabled;
|
|
static final boolean isServerWithStable;
|
|
|
|
static {
|
|
Boolean value = WB.getBooleanVMFlag("FoldStableValues");
|
|
isStableEnabled = (value == null ? false : value);
|
|
isServerWithStable = isStableEnabled && get();
|
|
System.out.println("@Stable: " + (isStableEnabled ? "enabled" : "disabled"));
|
|
System.out.println("Server Compiler: " + get());
|
|
}
|
|
|
|
// The method 'get' below returns true if the method is server compiled
|
|
// and is used by the Stable tests to determine whether methods in
|
|
// general are being server compiled or not as the -XX:+FoldStableValues
|
|
// option is only applicable to -server.
|
|
//
|
|
// On aarch64 we DeOptimize when patching. This means that when the
|
|
// method is compiled as a result of -Xcomp it DeOptimizes immediately.
|
|
// The result is that getMethodCompilationLevel returns 0. This means
|
|
// the method returns true based on java.vm.name.
|
|
//
|
|
// However when the tests are run with -XX:+TieredCompilation and
|
|
// -XX:TieredStopAtLevel=1 this fails because methods will always
|
|
// be client compiled.
|
|
//
|
|
// Solution is to add a simple method 'get1' which should never be
|
|
// DeOpted and use that to determine the compilation level instead.
|
|
static void get1() {
|
|
}
|
|
|
|
|
|
|
|
// ::get() is among immediately compiled methods.
|
|
static boolean get() {
|
|
try {
|
|
get1();
|
|
Method m = StableConfiguration.class.getDeclaredMethod("get1");
|
|
int level = WB.getMethodCompilationLevel(m);
|
|
if (level > 0) {
|
|
return (level == 4);
|
|
} else {
|
|
String javaVM = System.getProperty("java.vm.name", "");
|
|
if (javaVM.contains("Server")) return true;
|
|
if (javaVM.contains("Client")) return false;
|
|
throw new Error("Unknown VM type: "+javaVM);
|
|
}
|
|
} catch (NoSuchMethodException e) {
|
|
throw new Error(e);
|
|
}
|
|
}
|
|
|
|
}
|