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8054890: Serviceability: New diagnostic commands 'VM.set_flag' and 'JVMTI.data_dump'

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Reviewed-by: sla, fparain, egahlin, ykantser
This commit is contained in:
Jaroslav Bachorik 2015-03-23 11:46:15 +01:00
parent 1665046b90
commit a16c45029d
4 changed files with 282 additions and 0 deletions
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135
hotspot/test/serviceability/dcmd/vm/SetVMFlagTest.java Normal file
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/*
* Copyright (c) 2015, 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 com.oracle.java.testlibrary.OutputAnalyzer;
import com.oracle.java.testlibrary.dcmd.CommandExecutor;
import com.oracle.java.testlibrary.dcmd.JMXExecutor;
import org.testng.annotations.Test;
import static org.testng.Assert.*;
/*
* @test
* @bug 8054890
* @summary Test of VM.set_flag diagnostic command
* @library /testlibrary
* @build com.oracle.java.testlibrary.*
* @build com.oracle.java.testlibrary.dcmd.*
* @run testng SetVMFlagTest
*/
public class SetVMFlagTest {
private static final String PRINTGC_NAME = "PrintGC";
private static final String XMX_NAME = "MaxHeapSize";
private static final String PRINTGC_PATTERN = "\\s*bool " + PRINTGC_NAME +
"\\s+[\\:]?=\\s+(.*?)\\s+\\{manageable\\}";
private static final String XMX_PATTERN = "\\s*uintx " + XMX_NAME +
"\\s+[\\:]?=\\s+(.*?)\\s+\\{product\\}";
public void run(CommandExecutor executor) {
setMutableFlag(executor);
setMutableFlagWithInvalidValue(executor);
setImmutableFlag(executor);
setNonExistingFlag(executor);
}
@Test
public void jmx() {
run(new JMXExecutor());
}
private void setMutableFlag(CommandExecutor executor) {
OutputAnalyzer out = getAllFlags(executor);
String flagVal = out.firstMatch(PRINTGC_PATTERN, 1);
if (flagVal == null) {
System.err.println(out.getOutput());
throw new Error("'" + PRINTGC_NAME + "' flag is either not available or manageable");
}
Boolean blnVal = Boolean.parseBoolean(flagVal);
out = executor.execute("VM.set_flag " + PRINTGC_NAME + " " + (blnVal ? 0 : 1));
out.stderrShouldBeEmpty();
out = getAllFlags(executor);
String newFlagVal = out.firstMatch(PRINTGC_PATTERN, 1);
assertNotEquals(newFlagVal, flagVal);
}
private void setMutableFlagWithInvalidValue(CommandExecutor executor) {
OutputAnalyzer out = getAllFlags(executor);
String flagVal = out.firstMatch(PRINTGC_PATTERN, 1);
if (flagVal == null) {
System.err.println(out.getOutput());
throw new Error("'" + PRINTGC_NAME + "' flag is either not available or manageable");
}
// PrintGC is a boolean flag and accepts only 0/1 as its value
out = executor.execute("VM.set_flag " + PRINTGC_NAME + " unexpected_value");
out.stderrShouldBeEmpty();
out.stdoutShouldContain("flag value must be a boolean (1 or 0)");
out = getAllFlags(executor);
String newFlagVal = out.firstMatch(PRINTGC_PATTERN, 1);
assertEquals(newFlagVal, flagVal);
}
private void setImmutableFlag(CommandExecutor executor) {
OutputAnalyzer out = getAllFlags(executor);
String flagVal = out.firstMatch(XMX_PATTERN, 1);
if (flagVal == null) {
System.err.println(out.getOutput());
throw new Error("'" + XMX_NAME + "' flag is not available or immutable");
}
Long numVal = Long.parseLong(flagVal);
out = executor.execute("VM.set_flag " + XMX_NAME + " " + (numVal + 1));
out.stderrShouldBeEmpty();
out.stdoutShouldContain("only 'writeable' flags can be set");
out = getAllFlags(executor);
String newFlagVal = out.firstMatch(XMX_PATTERN, 1);
assertEquals(newFlagVal, flagVal);
}
private void setNonExistingFlag(CommandExecutor executor) {
String unknownFlag = "ThisIsUnknownFlag";
OutputAnalyzer out = executor.execute("VM.set_flag " + unknownFlag + " 1");
out.stderrShouldBeEmpty();
out.stdoutShouldContain("flag " + unknownFlag + " does not exist");
}
private OutputAnalyzer getAllFlags(CommandExecutor executor) {
return executor.execute("VM.flags -all");
}
}