JDK-8361913 : Thread.dump_to_file is not protected from mount/unmount
  • Type: Bug
  • Component: core-svc
  • Sub-Component: tools
  • Affected Version: 25
  • Priority: P3
  • Status: Closed
  • Resolution: Duplicate
  • OS: generic
  • CPU: generic
  • Submitted: 2025-07-10
  • Updated: 2025-09-15
  • Resolved: 2025-09-15
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JDK 26
26Resolved
Related Reports
Duplicate :  
JDK-8364343 - ThreadSnapshotFactory::get_thread_snapshot() crashes without JVMTI agent
Relates :  
JDK-8364314 - java_lang_Thread::get_thread_status fails assert(base != nullptr) failed: Invalid base
Relates :  
JDK-8357650 - ThreadSnapshot to take snapshot of thread for thread dumps
Relates :  
JDK-8361912 - ThreadsListHandle::cv_internal_thread_to_JavaThread does not deal with a virtual thread's carrier thread
Relates :  
JDK-8361103 - java_lang_Thread::async_get_stack_trace does not properly protect JavaThread
Description
jcmd Thread.dump_to_file commend and HotSpotDiagnosticMXBean.dumpThreads are implemented by ThreadSnapshotFactory::get_thread_snapshot().
It uses JvmtiVTMSTransitionDisabler to disable mount/unmount of virtual threads.
But JvmtiVTMSTransitionDisabler works only when some agent is loaded in the VM.