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Title: fix(profiler): fix SIGSEGV in Dictionary::clear under concurrent lookup by jbachorik · Pull Request #522 · DataDog/java-profiler · GitHub

Open Graph Title: fix(profiler): fix SIGSEGV in Dictionary::clear under concurrent lookup by jbachorik · Pull Request #522 · DataDog/java-profiler

X Title: fix(profiler): fix SIGSEGV in Dictionary::clear under concurrent lookup by jbachorik · Pull Request #522 · DataDog/java-profiler

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Open Graph Description: Summary hotspotSupport.cpp:533 called profiler->classMap()->lookup() directly in walkVM's signal-handler path without holding _class_map_lock. Concurrent Dictionary::clear() (called from ...

X Description: Summary hotspotSupport.cpp:533 called profiler->classMap()->lookup() directly in walkVM's signal-handler path without holding _class_map_lock. Concurrent Dictionary::clear() (...

Opengraph URL: https://github.com/DataDog/java-profiler/pull/522

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May 12, 2026https://github.com/DataDog/java-profiler/pull/522#event-25427642635
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May 12, 2026 13:46https://github.com/DataDog/java-profiler/pull/522#commits-pushed-727a4b6
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Merge main; fix lookupClassSignalSafe to use bounded CAS retrieshttps://github.com/DataDog/java-profiler/pull/522/commits/727a4b6a1de3c7ca1c1bb82fa55518b1921cc5c5
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test(jfr): add ConcurrentDumpRestartTest regression fromhttps://github.com/DataDog/java-profiler/pull/522/commits/0795dfbd24ae5bfd2e64e42fba75ee75cdc7cbe0
#523https://github.com/DataDog/java-profiler/pull/523
0795dfbhttps://github.com/DataDog/java-profiler/pull/522/commits/0795dfbd24ae5bfd2e64e42fba75ee75cdc7cbe0
test(jfr): regression test for dump+restart race (SIGSEGV in _Rb_tree_increment) #523 https://github.com/DataDog/java-profiler/pull/523
fix(profiler): lock-free class/endpoint/context maps via StringDictionary #524 https://github.com/DataDog/java-profiler/pull/524
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May 12, 2026https://github.com/DataDog/java-profiler/pull/522#issuecomment-4430789379
#524https://github.com/DataDog/java-profiler/pull/524
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