The following closed test failed in the JDK22 CI:

vmTestbase/runtime/pcl/stress/freeLock/forName/anonymous-simple/TestDescription.java

Here's a snippet from the log file:

#section:main
----------messages:(6/799)----------
command: main -Xmx256m -agentlib:PclRedefineClasses runtime.pcl.shared.ClassLoadingController -ITERATIONS 100 -DEBUG false -THREADS_COUNT 5 -classDir ./bin/classes/pcl/hierarchies/static-load/static-init/anonymous/simple -class custom.C% -provoke forName -provoke newInstance -regexForFreeingLock custom.A1
reason: User specified action: run main/othervm/native -Xmx256m -agentlib:PclRedefineClasses runtime.pcl.shared.ClassLoadingController -ITERATIONS 100 -DEBUG false -THREADS_COUNT 5 -classDir ./bin/classes/pcl/hierarchies/static-load/static-init/anonymous/simple -class custom.C% -provoke forName -provoke newInstance -regexForFreeingLock custom.A1
started: Fri Sep 22 13:48:45 UTC 2023
Mode: othervm [/othervm specified]
finished: Fri Sep 22 13:48:57 UTC 2023
elapsed time (seconds): 12.685
----------configuration:(0/0)----------
----------System.out:(19/1556)----------
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x0000ffffabceb060, pid=481316, tid=481981
#
# JRE version: Java(TM) SE Runtime Environment (22.0+17) (fastdebug build 22-ea+17-1275)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 22-ea+17-1275, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, parallel gc, linux-aarch64)
# Problematic frame:
# V [libjvm.so+0x111c060] LoaderConstraintTable::find_loader_constraint(Symbol*, ClassLoaderData*)+0x40
#
# Core dump will be written. Default location: Core dumps may be processed with "/opt/core.sh %p" (or dumping to /opt/mach5/mesos/work_dir/slaves/cd627e65-f015-4fb1-a1d2-b6c9b8127f98-S182819/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/e40e653d-5fdf-49e8-9ff8-4e8f83ec4f8d/runs/c9c8beb7-3e8c-418c-a65b-0f174e50f0ea/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading_quick/scratch/2/core.481316)
#
# An error report file with more information is saved as:
# /opt/mach5/mesos/work_dir/slaves/cd627e65-f015-4fb1-a1d2-b6c9b8127f98-S182819/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/e40e653d-5fdf-49e8-9ff8-4e8f83ec4f8d/runs/c9c8beb7-3e8c-418c-a65b-0f174e50f0ea/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading_quick/scratch/2/hs_err_pid481316.log
[8.957s][warning][os] Loading hsdis library failed
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#
----------System.err:(48/2136)----------
new number of threads: 5
Iteration #0 of 100, time left: 30 s
Finished iteration #0: successful (time left: 29 s)
Iteration #1 of 100, time left: 29 s
Finished iteration #1: successful (time left: 29 s)
Iteration #2 of 100, time left: 29 s
Finished iteration #2: successful (time left: 29 s)
Iteration #3 of 100, time left: 29 s
Finished iteration #3: successful (time left: 28 s)
Iteration #4 of 100, time left: 28 s
Finished iteration #4: successful (time left: 28 s)
Iteration #5 of 100, time left: 28 s
Finished iteration #5: successful (time left: 28 s)
Iteration #6 of 100, time left: 28 s
Finished iteration #6: successful (time left: 28 s)
Iteration #7 of 100, time left: 28 s
Finished iteration #7: successful (time left: 27 s)
Iteration #8 of 100, time left: 27 s
Finished iteration #8: successful (time left: 27 s)
Iteration #9 of 100, time left: 27 s
Finished iteration #9: successful (time left: 27 s)
Iteration #10 of 100, time left: 27 s
Finished iteration #10: successful (time left: 27 s)
Iteration #11 of 100, time left: 27 s
Finished iteration #11: successful (time left: 26 s)
Iteration #12 of 100, time left: 26 s
Finished iteration #12: successful (time left: 26 s)
Iteration #13 of 100, time left: 26 s
Finished iteration #13: successful (time left: 26 s)
Iteration #14 of 100, time left: 26 s
Finished iteration #14: successful (time left: 26 s)
Iteration #15 of 100, time left: 26 s
Finished iteration #15: successful (time left: 25 s)
Iteration #16 of 100, time left: 25 s
Finished iteration #16: successful (time left: 25 s)
Iteration #17 of 100, time left: 25 s
Finished iteration #17: successful (time left: 25 s)
Iteration #18 of 100, time left: 25 s
Finished iteration #18: successful (time left: 25 s)
Iteration #19 of 100, time left: 25 s
Finished iteration #19: successful (time left: 24 s)
Iteration #20 of 100, time left: 24 s
Finished iteration #20: successful (time left: 24 s)
Iteration #21 of 100, time left: 24 s
Finished iteration #21: successful (time left: 24 s)
Iteration #22 of 100, time left: 24 s
Finished iteration #22: successful (time left: 24 s)
Iteration #23 of 100, time left: 24 s
----------rerun:(39/10137)*----------

<snip>

result: Failed. Unexpected exit from test [exit code: 134]


Here's the crashing thread's stack:

--------------- T H R E A D ---------------

Current thread (0x0000ffff4c22f170): JavaThread "Loading Thread #4" [_thread_in_vm, id=481981, stack(0x0000ffff71a14000,0x0000ffff71c12000) (2040K)]

Stack: [0x0000ffff71a14000,0x0000ffff71c12000], sp=0x0000ffff71c0cc40, free space=2019k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x111c060] LoaderConstraintTable::find_loader_constraint(Symbol*, ClassLoaderData*)+0x40 (symbol.hpp:160)
V [libjvm.so+0x111d144] LoaderConstraintTable::remove_failed_loaded_klass(InstanceKlass*, ClassLoaderData*)+0x20 (loaderConstraints.cpp:452)
V [libjvm.so+0x15d37c0] SystemDictionary::find_or_define_instance_class(Symbol*, Handle, InstanceKlass*, JavaThread*)+0xb0 (systemDictionary.cpp:1532)
V [libjvm.so+0x15d3a0c] SystemDictionary::resolve_class_from_stream(ClassFileStream*, Symbol*, Handle, ClassLoadInfo const&, JavaThread*)+0xfc (systemDictionary.cpp:902)
V [libjvm.so+0xee0d5c] jvm_define_class_common(char const*, _jobject*, signed char const*, int, _jobject*, char const*, JavaThread*)+0x1fc (jvm.cpp:912)
V [libjvm.so+0xee0f98] JVM_DefineClassWithSource+0xa4 (jvm.cpp:1079)
C [libjava.so+0xf27c] Java_java_lang_ClassLoader_defineClass1+0x1bc (ClassLoader.c:139)
J 598 java.lang.ClassLoader.defineClass1(Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;Ljava/lang/String;)Ljava/lang/Class; java.base@22-ea (0 bytes) @ 0x0000ffff94633d44 [0x0000ffff94633c40+0x0000000000000104]

[error occurred during error reporting (printing native stack (with source info)), id 0xe0000000, Internal Error (/opt/mach5/mesos/work_dir/slaves/cd627e65-f015-4fb1-a1d2-b6c9b8127f98-S182681/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/c6de0b50-213c-486b-a786-ff861196cc50/runs/540e02f6-0108-4f34-9ed4-5986529227f4/workspace/open/src/hotspot/share/code/codeCache.inline.hpp:49)]

Retrying call stack printing without source information...
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x111c060] LoaderConstraintTable::find_loader_constraint(Symbol*, ClassLoaderData*)+0x40
V [libjvm.so+0x111d144] LoaderConstraintTable::remove_failed_loaded_klass(InstanceKlass*, ClassLoaderData*)+0x20
V [libjvm.so+0x15d37c0] SystemDictionary::find_or_define_instance_class(Symbol*, Handle, InstanceKlass*, JavaThread*)+0xb0
V [libjvm.so+0x15d3a0c] SystemDictionary::resolve_class_from_stream(ClassFileStream*, Symbol*, Handle, ClassLoadInfo const&, JavaThread*)+0xfc
V [libjvm.so+0xee0d5c] jvm_define_class_common(char const*, _jobject*, signed char const*, int, _jobject*, char const*, JavaThread*)+0x1fc
V [libjvm.so+0xee0f98] JVM_DefineClassWithSource+0xa4
C [libjava.so+0xf27c] Java_java_lang_ClassLoader_defineClass1+0x1bc
J 598 java.lang.ClassLoader.defineClass1(Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;Ljava/lang/String;)Ljava/lang/Class; java.base@22-ea (0 bytes) @ 0x0000ffff94633d44 [0x0000ffff94633c40+0x0000000000000104]

[error occurred during error reporting (retry printing native stack (no source info)), id 0xe0000000, Internal Error (/opt/mach5/mesos/work_dir/slaves/cd627e65-f015-4fb1-a1d2-b6c9b8127f98-S182681/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/c6de0b50-213c-486b-a786-ff861196cc50/runs/540e02f6-0108-4f34-9ed4-5986529227f4/workspace/open/src/hotspot/share/code/codeCache.inline.hpp:49)]
Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J 598 java.lang.ClassLoader.defineClass1(Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;Ljava/lang/String;)Ljava/lang/Class; java.base@22-ea (0 bytes) @ 0x0000ffff94633d44 [0x0000ffff94633c40+0x0000000000000104]
J 547 c1 java.lang.ClassLoader.defineClass(Ljava/lang/String;[BIILjava/security/ProtectionDomain;)Ljava/lang/Class; java.base@22-ea (43 bytes) @ 0x0000ffff8cc33950 [0x0000ffff8cc33580+0x00000000000003d0]
J 644 c1 java.lang.ClassLoader.defineClass(Ljava/lang/String;[BII)Ljava/lang/Class; java.base@22-ea (11 bytes) @ 0x0000ffff8cc5f9d4 [0x0000ffff8cc5f8c0+0x0000000000000114]
j runtime.pcl.shared.CustomLoader.loadClassFromFile(Ljava/lang/String;Ljava/lang/String;ZZ)Ljava/lang/Class;+235
J 657 c1 runtime.pcl.shared.CustomLoader.loadClassSpecially(Ljava/lang/String;ZZ)Ljava/lang/Class; (389 bytes) @ 0x0000ffff8cc64d38 [0x0000ffff8cc61740+0x00000000000035f8]
J 530 c1 runtime.pcl.shared.CustomLoader.loadClass(Ljava/lang/String;)Ljava/lang/Class; (8 bytes) @ 0x0000ffff8cc26fcc [0x0000ffff8cc26ec0+0x000000000000010c]
v ~StubRoutines::call_stub 0x0000ffff9407017c
J 598 java.lang.ClassLoader.defineClass1(Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;Ljava/lang/String;)Ljava/lang/Class; java.base@22-ea (0 bytes) @ 0x0000ffff94633d44 [0x0000ffff94633c40+0x0000000000000104]
J 547 c1 java.lang.ClassLoader.defineClass(Ljava/lang/String;[BIILjava/security/ProtectionDomain;)Ljava/lang/Class; java.base@22-ea (43 bytes) @ 0x0000ffff8cc33950 [0x0000ffff8cc33580+0x00000000000003d0]
J 644 c1 java.lang.ClassLoader.defineClass(Ljava/lang/String;[BII)Ljava/lang/Class; java.base@22-ea (11 bytes) @ 0x0000ffff8cc5f9d4 [0x0000ffff8cc5f8c0+0x0000000000000114]
j runtime.pcl.shared.CustomLoader.loadClassFromFile(Ljava/lang/String;Ljava/lang/String;ZZ)Ljava/lang/Class;+235
J 657 c1 runtime.pcl.shared.CustomLoader.loadClassSpecially(Ljava/lang/String;ZZ)Ljava/lang/Class; (389 bytes) @ 0x0000ffff8cc64d38 [0x0000ffff8cc61740+0x00000000000035f8]
J 530 c1 runtime.pcl.shared.CustomLoader.loadClass(Ljava/lang/String;)Ljava/lang/Class; (8 bytes) @ 0x0000ffff8cc26fcc [0x0000ffff8cc26ec0+0x000000000000010c]
v ~StubRoutines::call_stub 0x0000ffff9407017c
j java.lang.Class.forName0(Ljava/lang/String;ZLjava/lang/ClassLoader;Ljava/lang/Class;)Ljava/lang/Class;+0 java.base@22-ea
j java.lang.Class.forName(Ljava/lang/String;ZLjava/lang/ClassLoader;Ljava/lang/Class;)Ljava/lang/Class;+37 java.base@22-ea
j java.lang.Class.forName(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;+20 java.base@22-ea
j runtime.pcl.shared.ProvokeType.provoke(Ljava/lang/ClassLoader;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V+50
j runtime.pcl.shared.ProvokeType.provoke(Ljava/lang/ClassLoader;Ljava/lang/String;)V+8
j runtime.pcl.shared.ClassLoadingTask.run()V+20
j java.lang.Thread.runWith(Ljava/lang/Object;Ljava/lang/Runnable;)V+5 java.base@22-ea
j java.lang.Thread.run()V+19 java.base@22-ea
v ~StubRoutines::call_stub 0x0000ffff9407017c

siginfo: si_signo: 11 (SIGSEGV), si_code: 1 (SEGV_MAPERR), si_addr: 0x0000000000000006