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/*
* Copyright (c) 2013, 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.
*/
/*
* @test
* @bug 8027572
* @summary class unloading resets profile, method compiled after the profile is
* first set and before class loading sets unknown bit with not recorded class
* @library /
* @build compiler.profiling.unloadingconflict.B
* @run main/othervm -XX:TypeProfileLevel=222 -XX:-BackgroundCompilation
* compiler.profiling.unloadingconflict.TestProfileConflictClassUnloading
*
*/
package compiler.profiling.unloadingconflict;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Paths;
public class TestProfileConflictClassUnloading {
static class A {
}
static void m1(Object o) {
}
static void m2(Object o) {
m1(o);
}
static void m3(A a, boolean do_call) {
if (!do_call) {
return;
}
m2(a);
}
public static ClassLoader newClassLoader() {
try {
return new URLClassLoader(new URL[] {
Paths.get(System.getProperty("test.classes",".")).toUri().toURL(),
}, null);
} catch (MalformedURLException e){
throw new RuntimeException("Unexpected URL conversion failure", e);
}
}
public static void main(String[] args) throws Exception {
ClassLoader loader = newClassLoader();
Object o = loader.loadClass("compiler.profiling.unloadingconflict.B").newInstance();
// collect conflicting profiles
for (int i = 0; i < 5000; i++) {
m2(o);
}
// prepare for conflict
A a = new A();
for (int i = 0; i < 5000; i++) {
m3(a, false);
}
// unload class in profile
o = null;
loader = null;
System.gc();
// record the conflict
m3(a, true);
// trigger another GC
System.gc();
}
}
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