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[Prototype] Lazy jmethodIDs phase 2: keep names of classes unloaded before the dump - #876

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rkennke wants to merge 17 commits into

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proto/phase2-pending-set

Draft

[Prototype] Lazy jmethodIDs phase 2: keep names of classes unloaded before the dump#876
rkennke wants to merge 17 commits into
mainfrom
proto/phase2-pending-set

Commits on Oct 15, 2026
- Add fjmethodid=lazy: resolve raw Method* frames via a class liveness registry
  
  rkennke
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  claude
  committed
  8ef576b
- Tag raw Method* frames with a KlassRegistry epoch to reject reused Klass* addresses
  
  rkennke
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  claude
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  581e2df
- Locate Klass::_trace_id by probing array klasses
  
  rkennke
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  claude
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  a3bab23
- Tag raw Method* frames with the holder's JFR trace ID when calibrated
  
  rkennke
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  claude
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  a9b6777
- Mark each raw frame's tag kind and validate the trace-ID offset against JFR in CI
  
  rkennke
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  claude
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  cd01bda
- Harden lazy resolution against metadata reuse and redefinition
  
  rkennke
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  claude
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  f86c2d2
- Validate the trace-ID offset against jdk.ClassDefine instead of execution samples
  
  rkennke
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  claude
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  55a047a
- Cache raw frame resolutions per dump
  
  rkennke
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  claude
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  75e6870
- Let JVMTI validate redefinition arguments before the hooks inspect them
  
  rkennke
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  claude
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  3f848c6
- Stress-test lazy resolution against live class redefinition
  
  rkennke
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  claude
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  433e7f0
- Drop registry-epoch tags; lazy mode requires JFR trace IDs
  
  rkennke
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  claude
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  fdbb8ca
- Catch a malformed trace ID in LazyTraceIdJfrValidationTest's log parser
  
  rkennke
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  claude
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  8a5d5b8
Commits on Oct 16, 2026
- Add working plan for combining #864 and #867
  
  committed
  8201325
- Resolve raw frames from VM metadata instead of allocating jmethodIDs
  
  committed
  ef10a2d
- Update the combined plan: PR structure, phase 1 status, Linux hand-over
  
  committed
  8340625
- Prototype: capture names of unloadable raw frames at GC start
  
  committed
  0c78fb1
Commits on Oct 19, 2026
- Prototype: drain unloadable raw frames off-pause; measure on Linux
  
  rkennke
  and
  claude
  committed
  6a6000d

Commits

Commits on Oct 15, 2026

Commits on Oct 16, 2026

Commits on Oct 19, 2026