C2: SIGSEGV in PhaseChaitin::gather_lrg_masks

The following test failed in the JDK22 CI:

vmTestbase/runtime/pcl/mixed/combine/forName/mixed_6/TestDescription.java

Here's a snippet from the log file:

#section:driver
----------messages:(7/1393)----------
command: driver runtime.pcl.shared.HierarchyBuilder static-load/dynamic-init/abstract static-load/dynamic-init/anonymous/complex static-load/dynamic-init/anonymous/simple static-load/dynamic-init/complex static-load/dynamic-init/inner/complex static-load/dynamic-init/inner/simple static-load/dynamic-init/interface static-load/dynamic-init/simple static-load/independent static-load/static-init/anonymous/complex static-load/static-init/anonymous/simple static-load/static-init/complex static-load/static-init/inner/complex static-load/static-init/inner/simple static-load/static-init/simple static-load/tree
reason: User specified action: run driver/timeout=680 runtime.pcl.shared.HierarchyBuilder static-load/dynamic-init/abstract static-load/dynamic-init/anonymous/complex static-load/dynamic-init/anonymous/simple static-load/dynamic-init/complex static-load/dynamic-init/inner/complex static-load/dynamic-init/inner/simple static-load/dynamic-init/interface static-load/dynamic-init/simple static-load/independent static-load/static-init/anonymous/complex static-load/static-init/anonymous/simple static-load/static-init/complex static-load/static-init/inner/complex static-load/static-init/inner/simple static-load/static-init/simple static-load/tree
started: Sun Dec 03 13:49:27 GMT 2023
Mode: agentvm
Agent id: 7
finished: Sun Dec 03 13:50:49 GMT 2023
elapsed time (seconds): 82.109
----------configuration:(17/2730)----------

<snip>

----------System.err:(56/6679)----------
/System/Volumes/Data/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S26017/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2e7ead7e-9770-4c95-a083-9b015bed71d0/runs/2fdf4c11-f5cc-41aa-8b58-fb16500fdcd5/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading/scratch/0/./genSrc/pcl/hierarchies/static-load/tree -> /System/Volumes/Data/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S26017/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2e7ead7e-9770-4c95-a083-9b015bed71d0/runs/2fdf4c11-f5cc-41aa-8b58-fb16500fdcd5/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading/scratch/0/./bin/classes/pcl/hierarchies/static-load/tree
/System/Volumes/Data/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S26017/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2e7ead7e-9770-4c95-a083-9b015bed71d0/runs/2fdf4c11-f5cc-41aa-8b58-fb16500fdcd5/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading/scratch/0/./genSrc/pcl/hierarchies/static-load/tree/redefine -> /System/Volumes/Data/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S26017/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2e7ead7e-9770-4c95-a083-9b015bed71d0/runs/2fdf4c11-f5cc-41aa-8b58-fb16500fdcd5/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading/scratch/0/./bin/classes/pcl/hierarchies/static-load/tree/redefine
/System/Volumes/Data/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S26017/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2e7ead7e-9770-4c95-a083-9b015bed71d0/runs/2fdf4c11-f5cc-41aa-8b58-fb16500fdcd5/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading/scratch/0/./genSrc/pcl/hierarchies/static-load/independent -> /System/Volumes/Data/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S26017/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2e7ead7e-9770-4c95-a083-9b015bed71d0/runs/2fdf4c11-f5cc-41aa-8b58-fb16500fdcd5/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading/scratch/0/./bin/classes/pcl/hierarchies/static-load/independent
/System/Volumes/Data/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S26017/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2e7ead7e-9770-4c95-a083-9b015bed71d0/runs/2fdf4c11-f5cc-41aa-8b58-fb16500fdcd5/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading/scratch/0/./genSrc/pcl/hierarchies/static-load/independent/redefine -> /System/Volumes/Data/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S26017/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2e7ead7e-9770-4c95-a083-9b015bed71d0/runs/2fdf4c11-f5cc-41aa-8b58-fb16500fdcd5/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading/scratch/0/./bin/classes/pcl/hierarchies/static-load/independent/redefine
 stdout: [#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x000000010b72dc10, pid=8712, tid=26635
#
# JRE version: Java(TM) SE Runtime Environment (22.0+27) (fastdebug build 22-ea+27-2170)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 22-ea+27-2170, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, bsd-amd64)
# Problematic frame:
# V [libjvm.dylib+0x4c2c10] PhaseChaitin::gather_lrg_masks(bool)+0xef0
#
# Core dump will be written. Default location: core.8712
#
# An error report file with more information is saved as:
# /System/Volumes/Data/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S26017/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2e7ead7e-9770-4c95-a083-9b015bed71d0/runs/2fdf4c11-f5cc-41aa-8b58-fb16500fdcd5/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading/scratch/0/hs_err_pid8712.log
#
# Compiler replay data is saved as:
# /System/Volumes/Data/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S26017/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2e7ead7e-9770-4c95-a083-9b015bed71d0/runs/2fdf4c11-f5cc-41aa-8b58-fb16500fdcd5/testoutput/test-support/jtreg_closed_test_hotspot_jtreg_vmTestbase_vm_parallel_class_loading/scratch/0/replay_pid8712.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#
];
 stderr: [Java HotSpot(TM) 64-Bit Server VM warning: outputStream::do_vsnprintf output truncated -- buffer length is 2000 bytes but 18641 bytes are needed.
]
 exitValue = 134

java.lang.RuntimeException: Expected to get exit value of [0], exit value is: [134]
at jdk.test.lib.process.OutputAnalyzer.shouldHaveExitValue(OutputAnalyzer.java:511)
at runtime.pcl.shared.HierarchyBuilder.compile(HierarchyBuilder.java:173)
at runtime.pcl.shared.HierarchyBuilder.lambda$main$1(HierarchyBuilder.java:51)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.base/java.util.stream.DistinctOps$1$2.accept(DistinctOps.java:174)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:212)
at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:194)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:212)
at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1939)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:556)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:546)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:611)
at runtime.pcl.shared.HierarchyBuilder.main(HierarchyBuilder.java:51)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
at java.base/java.lang.Thread.run(Thread.java:1570)

JavaTest Message: Test threw exception: java.lang.RuntimeException
JavaTest Message: shutting down test

----------System.out:(60/54852)----------