Add JFR ThreadDump support

[thallium]

Note that NativeLibrary is only supported on Linux at this moment.

[thallium]

Sample ThreadDump output:

jdk.ThreadDump {
  startTime = 15:37:23.141 (2024-10-03)
  result = "0x1aa00 javaTID: 2 osTID: 2881523
0x1e700 javaTID: 4 osTID: 2881525
0x22400 javaTID: 5 osTID: 2881526
0x26100 javaTID: 6 osTID: 2881527
0x29e00 javaTID: 7 osTID: 2881528
0x2db00 javaTID: 8 osTID: 2881529
0x31800 javaTID: 9 osTID: 2881530
0x35500 javaTID: 10 osTID: 2881531
0x39200 javaTID: 11 osTID: 2881532
0x3cf00 javaTID: 12 osTID: 2881533
0x40c00 javaTID: 13 osTID: 2881534
0x144300 javaTID: 3 osTID: 2881596
0x213500 javaTID: 14 osTID: 2881640
0x217200 javaTID: 15 osTID: 2881641
0x223000 javaTID: 16 osTID: 2881642
0x226d00 javaTID: 17 osTID: 2881643
0x22aa00 javaTID: 18 osTID: 2881644
0x22e700 javaTID: 19 osTID: 2881645
0x232400 javaTID: 20 osTID: 2881646
0x236100 javaTID: 21 osTID: 2881647
0x239e00 javaTID: 22 osTID: 2881648
0x23db00 javaTID: 23 osTID: 2881649
0x26a600 javaTID: 26 osTID: 2881651
0x26e300 javaTID: 27 osTID: 2881652
Number of threads: 24"
}

Also FYI @tajila

[tajila]

Sample ThreadDump output:

The RI version also outputs stacktraces

[tajila]

can you please split this into two PRs one for thread ump and another for native lib support

[thallium]

Opened PR for native library: #20543

[thallium]

Sample output:

"main" J9VMThread: 0x1aa00 tid: 2 nid: 2878591 prio: 5 state: R
at com/ibm/oti/vm/VM.jfrDump(Native Method)
at JFRTest.main(JFRTest.java:26(Compiled Code))

"JIT Compilation Thread-000" J9VMThread: 0x1e700 tid: 4 nid: 2878593 prio: 10 state: R

"JIT Compilation Thread-001 Suspended" J9VMThread: 0x22400 tid: 5 nid: 2878594 prio: 10 state: R

"JIT Compilation Thread-002 Suspended" J9VMThread: 0x26100 tid: 6 nid: 2878595 prio: 10 state: R

"JIT Compilation Thread-003 Suspended" J9VMThread: 0x29e00 tid: 7 nid: 2878596 prio: 10 state: R

"JIT Compilation Thread-004 Suspended" J9VMThread: 0x2db00 tid: 8 nid: 2878597 prio: 10 state: R

"JIT Compilation Thread-005 Suspended" J9VMThread: 0x31800 tid: 9 nid: 2878598 prio: 10 state: R

"JIT Compilation Thread-006 Suspended" J9VMThread: 0x35500 tid: 10 nid: 2878599 prio: 10 state: R

"JIT Diagnostic Compilation Thread-007 Suspended" J9VMThread: 0x39200 tid: 11 nid: 2878600 prio: 10 state: R

"JIT-SamplerThread" J9VMThread: 0x3cf00 tid: 12 nid: 2878656 prio: 10 state: CW

"IProfiler" J9VMThread: 0x40c00 tid: 13 nid: 2878657 prio: 5 state: R

"Common-Cleaner" J9VMThread: 0x144300 tid: 3 nid: 2878695 prio: 8 state: CW waiting on: java/lang/ref/ReferenceQueue@0x70623c8f8
at java/lang/Object.waitImpl(Native Method)
at java/lang/Object.wait(Object.java:255)
at java/lang/Object.wait(Object.java:221)
at java/lang/ref/ReferenceQueue.remove(ReferenceQueue.java:140)
at jdk/internal/ref/CleanerImpl.run(CleanerImpl.java:140)
at java/lang/Thread.runWith(Thread.java:1608)
at java/lang/Thread.run(Thread.java:1595)
at jdk/internal/misc/InnocuousThread.run(InnocuousThread.java:186)

"Finalizer thread" J9VMThread: 0x213500 tid: 15 nid: 2878697 prio: 5 state: R

"Concurrent Mark Helper" J9VMThread: 0x217200 tid: 14 nid: 2878698 prio: 1 state: R

"GC Worker" J9VMThread: 0x21af00 tid: 16 nid: 2878699 prio: 5 state: R

"GC Worker" J9VMThread: 0x21ec00 tid: 17 nid: 2878700 prio: 5 state: R

"GC Worker" J9VMThread: 0x222900 tid: 18 nid: 2878701 prio: 5 state: R

"GC Worker" J9VMThread: 0x226600 tid: 19 nid: 2878702 prio: 5 state: R

"GC Worker" J9VMThread: 0x22a300 tid: 20 nid: 2878703 prio: 5 state: R

"GC Worker" J9VMThread: 0x22e000 tid: 21 nid: 2878704 prio: 5 state: R

"GC Worker" J9VMThread: 0x231d00 tid: 22 nid: 2878705 prio: 5 state: R

"JFR sampler" J9VMThread: 0x235a00 tid: 23 nid: 2878706 prio: 5 state: R

"Attach API update file access time" J9VMThread: 0x26a500 tid: 26 nid: 2878708 prio: 5 state: CW
at java/lang/Thread.sleepImpl(Native Method)
at java/lang/Thread.sleep(Thread.java:516)
at openj9/internal/tools/attach/target/AttachHandler$1.run(AttachHandler.java:348)

"Attach API wait loop" J9VMThread: 0x26e200 tid: 27 nid: 2878709 prio: 10 state: R
at openj9/internal/tools/attach/target/IPC.waitSemaphore(Native Method)
at openj9/internal/tools/attach/target/CommonDirectory.waitSemaphore(CommonDirectory.java:264)
at openj9/internal/tools/attach/target/WaitLoop.waitForNotification(WaitLoop.java:66)
at openj9/internal/tools/attach/target/WaitLoop.run(WaitLoop.java:157)

Number of threads: 24

@tajila is there anything else we need to add to the output?