/*
* Copyright ( c ) 2017 , 2022 , 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 .
*
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*/
/*
* @ test PlainRead
* @ key cgroups
* @ requires os . family = = " linux "
* @ requires vm . flagless
* @ library / testlibrary / test / lib
* @ build jdk . test . whitebox . WhiteBox
* @ run driver jdk . test . lib . helpers . ClassFileInstaller jdk . test . whitebox . WhiteBox
* @ run main / othervm - Xbootclasspath / a : . - XX : + UnlockDiagnosticVMOptions - XX : + WhiteBoxAPI PlainRead
*/
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.Platform;
import jdk.test.whitebox.WhiteBox;
public class PlainRead {
static public void match(OutputAnalyzer oa, String what, String value) {
oa.shouldMatch("^.*" + what + " *" + value + ".*$" );
}
static public void noMatch(OutputAnalyzer oa, String what, String value) {
oa.shouldNotMatch("^.*" + what + " *" + value + ".*$" );
}
static final String good_value = "(\\d+|-1|-2|Unlimited)" ;
static final String bad_value = "(failed)" ;
static final String[] variables = {"Memory Limit is:" , "CPU Quota is:" , "CPU Period is:" , "active_processor_count:" };
static public void isContainer(OutputAnalyzer oa) {
for (String v: variables) {
match(oa, v, good_value);
}
for (String v: variables) {
noMatch(oa, v, bad_value);
}
}
static public void isNotContainer(OutputAnalyzer oa) {
oa.shouldMatch("^.*Can't open /proc/self/mountinfo.*$" );
}
public static void main(String[] args) throws Exception {
WhiteBox wb = WhiteBox.getWhiteBox();
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xlog:os+container=trace" , "-version" );
OutputAnalyzer output = new OutputAnalyzer(pb.start());
if (wb.isContainerized()) {
System.out.println("Inside a cgroup, testing..." );
isContainer(output);
}
}
}
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