Skip J9+ASAN tests due to OpenJ9 JVM bugs#418
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OpenJ9 has known GC stack-scanning and defineClass race bugs that are exposed by ASAN timing changes, causing intermittent JVM crashes (SIGSEGV in walkStackFrames during GC scanSlots). eclipse-openj9/openj9#23514 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
jbachorik
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test:asan
CI Test ResultsRun: #23233538485 | Commit:
Status Overview
Legend: ✅ passed | ❌ failed | ⚪ skipped | 🚫 cancelled Summary: Total: 54 | Passed: 54 | Failed: 0 Updated: 2026-03-18 07:49:54 UTC |
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Summary
Details
Nightly ASAN runs on J9 (17-j9, amd64) crash intermittently (~30% of recent runs) with two distinct SIGSEGV patterns:
walkStackFramesnull-deref during GCscanSlots— GC Worker scanning thread stacks reads ASCII string data instead of valid J9 stack frame structuresdefineClassImplcrash — non-canonical address dereference during reflective accessor class generation (matches confirmed open race eclipse-openj9/openj9#22129)Both crashes are in J9 internal code (libj9vm29.so, libj9prt29.so), not in our profiler. ASAN widens timing windows that expose these latent J9 bugs. The previous mitigation (fork-every-class + 30min timeout) was insufficient — the JVM crash kills the entire test task regardless.
Test plan
SKIPPEDnotFAILED)🤖 Generated with Claude Code