/* * Copyright (c) 2015, 2018, 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.
*/
privatestaticvoid testDump(String pathToGcRoots, Map<String, String> settings, boolean expectedChains) throws Exception { try (Recording r = new Recording()) {
Map<String, String> p = new HashMap<>(settings);
p.put(EventNames.OldObjectSample + "#" + Enabled.NAME, "true");
r.setName("dodo");
r.setSettings(p);
r.setToDisk(true);
r.start();
clearLeak();
System.out.println("Recording id: " + r.getId());
System.out.println("Settings: " + settings.toString());
System.out.println("Command: JFR.dump " + pathToGcRoots);
System.out.println("Chains expected: " + expectedChains);
buildLeak();
System.gc();
System.gc();
File recording = new File("TestJcmdDumpPathToGCRoots" + r.getId() + ".jfr");
recording.delete();
JcmdHelper.jcmd("JFR.dump", "name=dodo", pathToGcRoots, "filename=" + recording.getAbsolutePath());
r.setSettings(Collections.emptyMap());
List<RecordedEvent> events = RecordingFile.readAllEvents(recording.toPath()); if (events.isEmpty()) { thrownew Exception("No events found in recoding");
} boolean chains = hasChains(events); if (expectedChains && !chains) {
System.out.println(events); thrownew Exception("Expected chains but found none");
} if (!expectedChains && chains) {
System.out.println(events); thrownew Exception("Didn't expect chains but found some");
}
}
}
privatestaticvoid clearLeak() {
leak.clear();
}
privatestaticboolean hasChains(List<RecordedEvent> events) throws IOException { for (RecordedEvent e : events) {
RecordedObject ro = e.getValue("object"); if (ro.getValue("referrer") != null) { returntrue;
}
} returnfalse;
}
privatestaticvoid buildLeak() { for (int i = 0; i < OBJECT_COUNT;i ++) {
leak.add(new Object[0]);
}
}
}
Messung V0.5 in Prozent
¤ Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.0.8Bemerkung:
(vorverarbeitet am 2026-04-26)
¤
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.