IBM J9 VM is going open-source :)

ref: http://www.slideshare.net/MarkStoodley/under-the-hood-of-the-testarossa-jit-compiler ref: https://twitter.com/mstoodle

It can output JIT decisions using -Xjit:verbose,vlog=<file name>

Investigate if Testarossa has relatable concepts and look into writing a parser for its log and support this VM/JIT in JITWatch.

Hi @chriswhocodes - (thanks for developing this wonderful tool).

Setup : Ubuntu 16.04 with Oracle JDK 1.8.151

I am running the code on a server machine and using my local client machine to analyze the JIT log. Both the server and the client machine have identical OSes and JVM versions. The sever has hsdis, and the assembly is generated in the log. However, it is not shown (on the client machine) in the TriView plane.

When I click on the compiled method, I see this pop up on the console

17:19:35.598 [JavaFX Application Thread] WARN  o.a.j.c.CompilationUtil - No Task found in Compilation 1451
17:19:35.599 [JavaFX Application Thread] WARN  o.a.j.c.CompilationUtil - No Task found in Compilation 1451

JMH had recently added the Linux perf + PrintAssembly internal profiler, and we also switched to optionally dumping the perf-annotated hotspot.log. It would be nice if JITWatch can digest it. It does not right now, since it trips over the leading whitespace from the perf annotations.

Steps to produce the sample HS log:

 $ hg clone http://hg.openjdk.java.net/code-tools/jmh/ jmh
 $ mvn clean install -DskipTests
 $ java -Djmh.perfasm.saveLog=true -jar jmh-samples/target/benchmarks.jar ".*DeadCode.*" -wi 3 -i 3 -r 1 -f 1 -prof perfasm 
 $ vi ./org.openjdk.jmh.samples.JMHSample_08_DeadCode.measureRight-AverageTime.log

Learned already a lot from jitwatch - thanks :)

Some exceptions where thrown today for master (1.0.0-SNAPSHOT) and java 1.8.0_45:

• the first ones are probably due to my German environment:

23:39:21.116 [Thread-7] ERROR o.a.j.s.AttributeSuggestionWalker - Couldn't parse branch tag attribute 1,21666e+06
java.lang.NumberFormatException: For input string: "1,21666e+06"
        at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043) ~[na:1.8.0_45]
        at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110) ~[na:1.8.0_45]
        at java.lang.Double.parseDouble(Double.java:538) ~[na:1.8.0_45]
        at java.lang.Double.valueOf(Double.java:502) ~[na:1.8.0_45]
        at org.adoptopenjdk.jitwatch.suggestion.AttributeSuggestionWalker.handleBranchTag(AttributeSuggestionWalker.java:301) [jitwatch-1.0.0-SNAPSHOT.jar:na]
        at org.adoptopenjdk.jitwatch.suggestion.AttributeSuggestionWalker.processParseTag(AttributeSuggestionWalker.java:193) [jitwatch-1.0.0-SNAPSHOT.jar:na]
        at org.adoptopenjdk.jitwatch.suggestion.AttributeSuggestionWalker.processParseTag(AttributeSuggestionWalker.java:211) [jitwatch-1.0.0-SNAPSHOT.jar:na]
        at org.adoptopenjdk.jitwatch.suggestion.AttributeSuggestionWalker.processParseTag(AttributeSuggestionWalker.java:211) [jitwatch-1.0.0-SNAPSHOT.jar:na]
        at org.adoptopenjdk.jitwatch.suggestion.AttributeSuggestionWalker.visitTag(AttributeSuggestionWalker.java:367) [jitwatch-1.0.0-SNAPSHOT.jar:na]
        at org.adoptopenjdk.jitwatch.journal.JournalUtil.visitParseTagsOfLastTask(JournalUtil.java:91) [jitwatch-1.0.0-SNAPSHOT.jar:na]


23:39:21.114 [Thread-7] ERROR o.a.j.s.AttributeSuggestionWalker - Unrecognised branch probability: 0,50343
java.lang.NumberFormatException: For input string: "0,50343"
        at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043) ~[na:1.8.0_45]
        at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110) ~[na:1.8.0_45]
        at java.lang.Double.parseDouble(Double.java:538) ~[na:1.8.0_45]
        at org.adoptopenjdk.jitwatch.suggestion.AttributeSuggestionWalker.handleBranchTag(AttributeSuggestionWalker.java:313) [jitwatch-1.0.0-SNAPSHOT.jar:na]

• And a NPE:

Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
        at org.adoptopenjdk.jitwatch.model.MetaClass.loadInnerClasses(MetaClass.java:135)
        at org.adoptopenjdk.jitwatch.model.MetaClass.getClassBytecode(MetaClass.java:112)
        at org.adoptopenjdk.jitwatch.ui.triview.TriView.loadBytecodeForCurrentMember(TriView.java:631)
        at org.adoptopenjdk.jitwatch.ui.triview.TriView.setMember(TriView.java:513)
        at org.adoptopenjdk.jitwatch.ui.triview.TriView.setMember(TriView.java:488)
        at org.adoptopenjdk.jitwatch.ui.JITWatchUI.openTriView(JITWatchUI.java:693)
        at org.adoptopenjdk.jitwatch.ui.suggestion.MemberTableCell$1.handle(MemberTableCell.java:63)
        at org.adoptopenjdk.jitwatch.ui.suggestion.MemberTableCell$1.handle(MemberTableCell.java:59)
        at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)

The attached log has been generated with Graal 0.27 from http://www.oracle.com/technetwork/oracle-labs/program-languages/downloads/index.html. I added hsdis from JDK 8. The VM options were

-XX:+UnlockDiagnosticVMOptions
-XX:+TraceClassLoading
-XX:+LogCompilation
-XX:+PrintAssembly
-XX:LogFile=compilation8graal-0.5.1.txt

If I click on com.github.marschall.charsequences.CharSequences#uuidFromCharSequence(CharSequence) I get

Assembly not found. Was -XX:+PrintAssembly option used?

The classes JAR can be found here https://search.maven.org/remotecontent?filepath=com/github/marschall/charsequences/0.5.1/charsequences-0.5.1-jar-with-test-dependencies.jar The source JAR can be found here https://search.maven.org/remotecontent?filepath=com/github/marschall/charsequences/0.5.1/charsequences-0.5.1-sources.jar

This is the log compilation8graal-0.5.1.txt

Hi! I'm unable to see the assembly nor the bytecode in the TriView. The sources are shown fine, so does the JIT journal.

I'm using the VM flags recommended in the wiki:

-XX:+UnlockDiagnosticVMOptions -XX:+TraceClassLoading -XX:+LogCompilation > -XX:+PrintAssembly

This is the version of the JVM I'm using (with the HSDIS plugin).

java version "1.8.0" Java(TM) SE Runtime Environment (build 1.8.0-b132) Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)

My OS is Debian 8 (Jessie) x64.

I'm using the Java 8 binary download of JitWatch (my application is targeting Java 8).

The HotSpot log file does outputs the assembly, here is an example:

0x00007fd3994a649d: mov $0x1,%r10d 0x00007fd3994a64a3: jmpq 0x00007fd3994a630c 0x00007fd3994a64a8: mov %rdx,%rdi ;*synchronization entry ; -com.carrotsearch.hppc.ObjectObjectOpenHashMap::forEach@-1 (line 822)

Any attempt to open "Chain" view for any method results in NPE.

Checked current "master" branch and tag "1.4.7".

JDK version: 11.0.13.8, 11.0.15.10

java.lang.NullPointerException
    at org.adoptopenjdk.jitwatch.ui.compilechain.CompileChainStage.buildTree (CompileChainStage.java:375)
    at org.adoptopenjdk.jitwatch.ui.compilechain.CompileChainStage.compilationChanged (CompileChainStage.java:132)
    at org.adoptopenjdk.jitwatch.ui.main.JITWatchUI.openCompileChain (JITWatchUI.java:1271)
    at org.adoptopenjdk.jitwatch.ui.triview.TriView$1.handle (TriView.java:161)
    at org.adoptopenjdk.jitwatch.ui.triview.TriView$1.handle (TriView.java:155)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent (CompositeEventHandler.java:86)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent (EventHandlerManager.java:234)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent (EventHandlerManager.java:191)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent (CompositeEventDispatcher.java:59)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent (BasicEventDispatcher.java:58)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent (EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent (BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent (EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent (BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent (EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.EventUtil.fireEventImpl (EventUtil.java:74)
    at com.sun.javafx.event.EventUtil.fireEvent (EventUtil.java:49)
    at javafx.event.Event.fireEvent (Event.java:198)
    at javafx.scene.Node.fireEvent (Node.java:8792)
    at javafx.scene.control.Button.fire (Button.java:203)
    at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased (ButtonBehavior.java:208)
    at com.sun.javafx.scene.control.inputmap.InputMap.handle (InputMap.java:274)
    at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent (CompositeEventHandler.java:247)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent (CompositeEventHandler.java:80)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent (EventHandlerManager.java:234)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent (EventHandlerManager.java:191)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent (CompositeEventDispatcher.java:59)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent (BasicEventDispatcher.java:58)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent (EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent (BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent (EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent (BasicEventDispatcher.java:56)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent (EventDispatchChainImpl.java:114)
    at com.sun.javafx.event.EventUtil.fireEventImpl (EventUtil.java:74)
    at com.sun.javafx.event.EventUtil.fireEvent (EventUtil.java:54)
    at javafx.event.Event.fireEvent (Event.java:198)
    at javafx.scene.Scene$MouseHandler.process (Scene.java:3897)
    at javafx.scene.Scene.processMouseEvent (Scene.java:1878)
    at javafx.scene.Scene$ScenePeerListener.mouseEvent (Scene.java:2623)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run (GlassViewEventHandler.java:411)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run (GlassViewEventHandler.java:301)
    at java.security.AccessController.doPrivileged (Native Method)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2 (GlassViewEventHandler.java:450)
    at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock (QuantumToolkit.java:424)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent (GlassViewEventHandler.java:449)
    at com.sun.glass.ui.View.handleMouseEvent (View.java:557)
    at com.sun.glass.ui.View.notifyMouse (View.java:943)
    at com.sun.glass.ui.win.WinApplication._runLoop (Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3 (WinApplication.java:184)
    at java.lang.Thread.run (Thread.java:829)

Hi,

Using the latest code of jitwatch - I have a NPE in ParseUtil.java because componentType is null: if (componentType.isAssignableFrom(sigParamClass))

I added a simple if and it seems that memParamClass is "boolean".

I'm running 1.8.0 192.

Let me know if need something else.

Thanks

I am getting hundreds of errors like MetaMember not found for org.mypkg.benchmark.Compilation2Benchmarks$ fib$1, corresponding to the classes that I specifically want to analyze. 😄 I believe I've set the sources and classes correctly in config. The class and method do exist:

$ javap -p org.mypkg.benchmark.Compilation2Benchmarks$ | grep fib$1
  private static final int fib$1(int);

Where should I go from here?

When in a workflow of tweaking code, collecting hotspot logs, then analysing with JITWatch, the clicks to navigate back to the method of interest interrupt the flow.

It would be great if the UI could at least restore the selection of the main tree view. It would be better yet to re-open the TriView panel (assuming the method still exists in the most recent run.)

The other productivity improvement would be to allow command line options to trigger the "Start" with a particular hotspot.log and opening of a TriView at a given method.

The attached file was generated with JDK 11 and generated the following parse errors. Jitwatch is built from the current master branch:

Could not parse line 33060 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 run ()V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 run ()V
Could not parse line 33509 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 run ()V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 run ()V
Could not parse line 34372 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 34373 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V
Could not parse line 34376 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 34574 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 34575 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V
Could not parse line 34577 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 run ()V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 run ()V
Could not parse line 34580 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V
Could not parse line 34746 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V
Could not parse line 35161 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 35358 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 run ()V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 run ()V
Could not parse line 41020 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 41022 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 41311 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 41313 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 48056 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 run ()V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 run ()V
Could not parse line 48289 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 48344 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V
Could not parse line 48399 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 <init> (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)V
Could not parse line 48529 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 48587 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 run ()V : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 run ()V
Could not parse line 51117 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$2.0x0000000100066840 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;
Could not parse line 51176 : com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable; : MetaMember not found for com.github.marschall.memorymodeldemo.SynchronisedSum$$Lambda$3.0x0000000100066c40 get$Lambda (Lcom.github.marschall.memorymodeldemo.SynchronisedSum;)Ljava.lang.Runnable;

hotspot_pid212229.log

Hi,

While parsing a hotspot log (jitwatch is using zulu11.58.23-ca-jdk11.0.16.1-win_x64) jitwatch stopped with the following exception:

Exception in thread "Thread-3" java.lang.VerifyError: Cannot inherit from final class at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017) at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:555) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:458) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:398) at org.adoptopenjdk.jitwatch.util.ClassUtil.loadClassWithoutInitialising(ClassUtil.java:55) at org.adoptopenjdk.jitwatch.util.ParseUtil.lateLoadMetaClass(ParseUtil.java:1115) at org.adoptopenjdk.jitwatch.model.JITDataModel.findMetaMember(JITDataModel.java:257) at org.adoptopenjdk.jitwatch.util.ParseUtil.findMemberWithSignature(ParseUtil.java:352) at org.adoptopenjdk.jitwatch.parser.AbstractLogParser.findMemberWithSignature(AbstractLogParser.java:250) at org.adoptopenjdk.jitwatch.parser.AbstractLogParser.handleMember(AbstractLogParser.java:576) at org.adoptopenjdk.jitwatch.parser.AbstractLogParser.handleMethodLine(AbstractLogParser.java:479) at org.adoptopenjdk.jitwatch.parser.AbstractLogParser.handleTagQueued(AbstractLogParser.java:373) at org.adoptopenjdk.jitwatch.parser.hotspot.HotSpotLogParser.handleTag(HotSpotLogParser.java:356) at org.adoptopenjdk.jitwatch.parser.hotspot.HotSpotLogParser.parseLogCompilationLines(HotSpotLogParser.java:154) at org.adoptopenjdk.jitwatch.parser.hotspot.HotSpotLogParser.parseLogFile(HotSpotLogParser.java:130) at org.adoptopenjdk.jitwatch.parser.AbstractLogParser.processLogFile(AbstractLogParser.java:366) at org.adoptopenjdk.jitwatch.parser.ILogParser.processLogFile(ILogParser.java:23) at org.adoptopenjdk.jitwatch.ui.main.JITWatchUI$1.run(JITWatchUI.java:253) at java.base/java.lang.Thread.run(Thread.java:829)

I can't figure out how to go past this.

Thanks

I was exploring the default add sample in the JITWatch and suddenly this exception was shown.

Exception in thread "JavaFX Application Thread" java.lang.NullPointerException: Cannot invoke "org.adoptopenjdk.jitwatch.model.Tag.getAttributes()" because "<local8>" is null
        at org.adoptopenjdk.jitwatch.hotthrow.HotThrowFinder.visitTag(HotThrowFinder.java:119)
        at org.adoptopenjdk.jitwatch.hotthrow.HotThrowFinder.visitTag(HotThrowFinder.java:215)
        at org.adoptopenjdk.jitwatch.compilation.CompilationUtil.visitParseTagsOfCompilation(CompilationUtil.java:89)
        at org.adoptopenjdk.jitwatch.hotthrow.HotThrowFinder.findHotThrows(HotThrowFinder.java:94)
        at org.adoptopenjdk.jitwatch.toplist.HotThrowTopListVisitable.visit(HotThrowTopListVisitable.java:34)
        at org.adoptopenjdk.jitwatch.treevisitor.TreeVisitor.walkPackage(TreeVisitor.java:48)
        at org.adoptopenjdk.jitwatch.treevisitor.TreeVisitor.walkPackage(TreeVisitor.java:39)
        at org.adoptopenjdk.jitwatch.treevisitor.TreeVisitor.walkPackage(TreeVisitor.java:39)
        at org.adoptopenjdk.jitwatch.treevisitor.TreeVisitor.walkTree(TreeVisitor.java:29)
        at org.adoptopenjdk.jitwatch.toplist.AbstractTopListVisitable.buildTopList(AbstractTopListVisitable.java:58)
        at org.adoptopenjdk.jitwatch.ui.toplist.TopListStage.buildTableView(TopListStage.java:208)
        at org.adoptopenjdk.jitwatch.ui.toplist.TopListStage.access$100(TopListStage.java:48)
        at org.adoptopenjdk.jitwatch.ui.toplist.TopListStage$3.changed(TopListStage.java:151)
        at org.adoptopenjdk.jitwatch.ui.toplist.TopListStage$3.changed(TopListStage.java:146)
        at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:360)
        at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:80)
        at javafx.beans.property.ObjectPropertyBase.fireValueChangedEvent(ObjectPropertyBase.java:106)
        at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:113)
        at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:147)
        at javafx.scene.control.ComboBoxBase.setValue(ComboBoxBase.java:151)
        at javafx.scene.control.ComboBox.updateValue(ComboBox.java:516)
        at javafx.scene.control.ComboBox$3.changed(ComboBox.java:499)
        at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:360)
        at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:80)
        at javafx.beans.property.ReadOnlyObjectPropertyBase.fireValueChangedEvent(ReadOnlyObjectPropertyBase.java:80)
        at javafx.beans.property.ReadOnlyObjectWrapper.fireValueChangedEvent(ReadOnlyObjectWrapper.java:102)
        at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:113)
        at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:147)
        at javafx.scene.control.SelectionModel.setSelectedItem(SelectionModel.java:105)
        at javafx.scene.control.ComboBox$ComboBoxSelectionModel.lambda$new$0(ComboBox.java:556)
        at com.sun.javafx.binding.ExpressionHelper$SingleInvalidation.fireValueChangedEvent(ExpressionHelper.java:136)
        at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:80)
        at javafx.beans.property.ReadOnlyIntegerPropertyBase.fireValueChangedEvent(ReadOnlyIntegerPropertyBase.java:78)
        at javafx.beans.property.ReadOnlyIntegerWrapper.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:102)
        at javafx.beans.property.IntegerPropertyBase.markInvalid(IntegerPropertyBase.java:114)
        at javafx.beans.property.IntegerPropertyBase.set(IntegerPropertyBase.java:148)
        at javafx.scene.control.SelectionModel.setSelectedIndex(SelectionModel.java:69)
        at javafx.scene.control.SingleSelectionModel.updateSelectedIndex(SingleSelectionModel.java:215)
        at javafx.scene.control.SingleSelectionModel.select(SingleSelectionModel.java:149)
        at javafx.scene.control.skin.ComboBoxListViewSkin.lambda$createListView$10(ComboBoxListViewSkin.java:558)
        at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:348)
        at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:80)
        at javafx.beans.property.ReadOnlyIntegerPropertyBase.fireValueChangedEvent(ReadOnlyIntegerPropertyBase.java:78)
        at javafx.beans.property.ReadOnlyIntegerWrapper.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:102)
        at javafx.beans.property.IntegerPropertyBase.markInvalid(IntegerPropertyBase.java:114)
        at javafx.beans.property.IntegerPropertyBase.set(IntegerPropertyBase.java:148)
        at javafx.scene.control.SelectionModel.setSelectedIndex(SelectionModel.java:69)
        at javafx.scene.control.MultipleSelectionModelBase.select(MultipleSelectionModelBase.java:413)
        at javafx.scene.control.MultipleSelectionModelBase.clearAndSelect(MultipleSelectionModelBase.java:360)
        at javafx.scene.control.ListView$ListViewBitSetSelectionModel.clearAndSelect(ListView.java:1451)
        at com.sun.javafx.scene.control.behavior.CellBehaviorBase.simpleSelect(CellBehaviorBase.java:282)
        at com.sun.javafx.scene.control.behavior.CellBehaviorBase.doSelect(CellBehaviorBase.java:246)
        at com.sun.javafx.scene.control.behavior.CellBehaviorBase.mousePressed(CellBehaviorBase.java:176)
        at com.sun.javafx.scene.control.inputmap.InputMap.handle(InputMap.java:274)
        at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:247)
        at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
        at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
        at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
        at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
        at javafx.event.Event.fireEvent(Event.java:198)
        at javafx.scene.Scene$MouseHandler.process(Scene.java:3897)
        at javafx.scene.Scene.processMouseEvent(Scene.java:1878)
        at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2623)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:411)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:301)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:450)
        at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:424)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:449)
        at com.sun.glass.ui.View.handleMouseEvent(View.java:557)
        at com.sun.glass.ui.View.notifyMouse(View.java:943)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:184)
        at java.base/java.lang.Thread.run(Thread.java:833)

After the SpringBoot project adds source and class to the config, the following error occurs when you click start

hello~, I want to use JitWatch to help me analyze which code in my SpringBoot project is too high because which code is compiled and analyzed by JIT, but after pouring into the source code and class directory of the project according to wiki, there is an exception shown below. I don't know how to solve it for the time being, or whether there is a problem with my way of use. Please give me some advice. Thank you very much.

jitwatch.out

19:01:21.127 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.StringUtils'
19:01:21.128 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.StringUtils'
19:01:21.129 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.StringUtils'
19:01:21.129 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.StringUtils'
19:01:21.148 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.ConcurrentReferenceHashMap$Segment'
19:01:21.148 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.ConcurrentReferenceHashMap$Segment'
19:01:21.152 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.Assert'
19:01:21.152 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.Assert'
19:01:21.153 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.ConcurrentReferenceHashMap$Segment'
19:01:21.153 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.core.ResolvableType'
19:01:21.153 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.ConcurrentReferenceHashMap$Segment'
19:01:21.154 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.core.ResolvableType'
19:01:21.160 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.ConcurrentReferenceHashMap'
19:01:21.161 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.ConcurrentReferenceHashMap'
19:01:21.161 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.core.ResolvableType'
19:01:21.161 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.util.ObjectUtils'
19:01:21.161 [Thread-4] ERROR o.a.j.u.ParseUtil - ClassNotFoundException: 'org.springframework.core.ResolvableType'
......

jitwatch.out.log

The code cache view is less useful since JDK9 introduced the segmented code cache. The compiled methods are much harder to spot visually.

Need to obtain the correct address ranges for the native, profiled, and non-profiled segments and when viewing a compiled method, only show the address range for the segment containing that method.