8319072: JFR: Turn off events for JFR.view

Reviewed-by: mgronlun

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/AbstractDCmd.java

@@ -65,13 +65,15 @@ abstract class AbstractDCmd {
     // Remember to keep the two sides in synch.
     public abstract Argument[] getArgumentInfos();
 
-    // Called by native
     protected abstract void execute(ArgumentParser parser) throws DCmdException;
 
 
     // Called by native
     public final String[] execute(String source, String arg, char delimiter) throws DCmdException {
         this.source = source;
+        if (isInteractive()) {
+            JVM.exclude(Thread.currentThread());
+        }
         try {
             boolean log = Logger.shouldLog(LogTag.JFR_DCMD, LogLevel.DEBUG);
             if (log) {
@@ -92,9 +94,19 @@ public final String[] execute(String source, String arg, char delimiter) throws
             DCmdException e = new DCmdException(iae.getMessage());
             e.addSuppressed(iae);
             throw e;
+       } finally {
+           if (isInteractive()) {
+               JVM.include(Thread.currentThread());
+           }
        }
     }
 
+    // Diagnostic commands that are meant to be used interactively
+    // should turn off events to avoid noise in the output.
+    protected boolean isInteractive() {
+        return false;
+    }
+
     protected final Output getOutput() {
         return output;
     }

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/DCmdQuery.java

@@ -71,6 +71,11 @@ protected void execute(ArgumentParser parser) throws DCmdException {
         }
     }
 
+    @Override
+    protected final boolean isInteractive() {
+        return true;
+    }
+
     private String stripQuotes(String text) {
         if (text.startsWith("\"")) {
             text = text.substring(1);

src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/DCmdView.java

@@ -83,6 +83,11 @@ protected void execute(ArgumentParser parser) throws DCmdException {
         }
     }
 
+    @Override
+    protected final boolean isInteractive() {
+        return true;
+    }
+
     @Override
     public String[] printHelp() {
         List<String> lines = new ArrayList<>();