hotspot虚拟机源码
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/*
* 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.
*
* 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 8034775
* @summary Ensures correct minimal number of compiler threads (provided by -XX:CICompilerCount=)
* @library /testlibrary
*/
import com.oracle.java.testlibrary.*;
public class NumCompilerThreadsCheck {
public static void main(String[] args) throws Exception {
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:CICompilerCount=-1");
OutputAnalyzer out = new OutputAnalyzer(pb.start());
String expectedOutput = "CICompilerCount of -1 is invalid";
out.shouldContain(expectedOutput);
if (isZeroVm()) {
String expectedLowWaterMarkText = "must be at least 0";
out.shouldContain(expectedLowWaterMarkText);
}
}
private static boolean isZeroVm() {
String vmName = System.getProperty("java.vm.name");
if (vmName == null) {
throw new RuntimeException("No VM name");
}
if (vmName.toLowerCase().contains("zero")) {
return true;
}
return false;
}
}