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JDK 11 jdk.jfr.jmod - JFR Module
JDK 11 jdk.jfr.jmod is the JMOD file for JDK 11 JFR module.
JDK 11 JFR module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.jfr.jmod.
JDK 11 JFR module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.
JDK 11 JFR module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.jfr.
You can click and view the content of each source code file in the list below.
✍: FYIcenter
⏎ jdk/jfr/internal/OldObjectSample.java
package jdk.jfr.internal; import java.util.HashMap; import java.util.List; import java.util.Map; import jdk.jfr.Enabled; import jdk.jfr.RecordingState; import jdk.jfr.internal.settings.CutoffSetting; import jdk.jfr.internal.test.WhiteBox; // The Old Object event could have been implemented as a periodic event, but // due to chunk rotations and how settings are calculated when multiple recordings // are running at the same time, it would lead to unacceptable overhead. // // Instead, the event is only emitted before a recording stops and // if that recording has the event enabled. // // This requires special handling and the purpose of this class is to provide that // public final class OldObjectSample { private static final String EVENT_NAME = Type.EVENT_NAME_PREFIX + "OldObjectSample"; private static final String OLD_OBJECT_CUTOFF = EVENT_NAME + "#" + Cutoff.NAME; private static final String OLD_OBJECT_ENABLED = EVENT_NAME + "#" + Enabled.NAME; // Emit if old object is enabled in recoding with cutoff for that recording public static void emit(PlatformRecording recording) { if (isEnabled(recording)) { long nanos = CutoffSetting.parseValueSafe(recording.getSettings().get(OLD_OBJECT_CUTOFF)); long ticks = Utils.nanosToTicks(nanos); JVM.getJVM().emitOldObjectSamples(ticks, WhiteBox.getWriteAllObjectSamples()); } } // Emit if old object is enabled for at least one recording, and use the largest // cutoff for an enabled recoding public static void emit(List<PlatformRecording> recordings, Boolean pathToGcRoots) { boolean enabled = false; long cutoffNanos = Boolean.TRUE.equals(pathToGcRoots) ? Long.MAX_VALUE : 0L; for (PlatformRecording r : recordings) { if (r.getState() == RecordingState.RUNNING) { if (isEnabled(r)) { enabled = true; long c = CutoffSetting.parseValueSafe(r.getSettings().get(OLD_OBJECT_CUTOFF)); cutoffNanos = Math.max(c, cutoffNanos); } } } if (enabled) { long ticks = Utils.nanosToTicks(cutoffNanos); JVM.getJVM().emitOldObjectSamples(ticks, WhiteBox.getWriteAllObjectSamples()); } } public static void updateSettingPathToGcRoots(Map<String, String> s, Boolean pathToGcRoots) { if (pathToGcRoots != null) { s.put(OLD_OBJECT_CUTOFF, pathToGcRoots ? "infinity" : "0 ns"); } } public static Map<String, String> createSettingsForSnapshot(PlatformRecording recording, Boolean pathToGcRoots) { Map<String, String> settings = new HashMap<>(recording.getSettings()); updateSettingPathToGcRoots(settings, pathToGcRoots); return settings; } private static boolean isEnabled(PlatformRecording r) { Map<String, String> settings = r.getSettings(); String s = settings.get(OLD_OBJECT_ENABLED); return "true".equals(s); } }
⏎ jdk/jfr/internal/OldObjectSample.java
Or download all of them as a single archive file:
File name: jdk.jfr-11.0.1-src.zip File size: 237632 bytes Release date: 2018-11-04 Download
⇒ JDK 11 jdk.jlink.jmod - JLink Tool
2020-06-30, 44150👍, 0💬
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