Repository navigation

Add fjmethodid=lazy: profile HotSpot without jmethodIDs - #868

Merged

rkennke merged 32 commits into

mainfrom

investigate/lazy-jmethodid-vm-resolution

Oct 21, 2026

Merged

Add fjmethodid=lazy: profile HotSpot without jmethodIDs#868
rkennke merged 32 commits into
mainfrom
investigate/lazy-jmethodid-vm-resolution

Commits on Oct 21, 2026
- Add fjmethodid=lazy: resolve raw Method* frames via a class liveness registry
  
  rkennke
  and
  claude
  committed
  4c6c7d1
- Tag raw Method* frames with a KlassRegistry epoch to reject reused Klass* addresses
  
  rkennke
  and
  claude
  committed
  8917466
- Locate Klass::_trace_id by probing array klasses
  
  rkennke
  and
  claude
  committed
  9c3ad33
- Tag raw Method* frames with the holder's JFR trace ID when calibrated
  
  rkennke
  and
  claude
  committed
  133d109
- Mark each raw frame's tag kind and validate the trace-ID offset against JFR in CI
  
  rkennke
  and
  claude
  committed
  1772384
- Harden lazy resolution against metadata reuse and redefinition
  
  rkennke
  and
  claude
  committed
  feded39
- Validate the trace-ID offset against jdk.ClassDefine instead of execution samples
  
  rkennke
  and
  claude
  committed
  6ccbfa4
- Cache raw frame resolutions per dump
  
  rkennke
  and
  claude
  committed
  50089d8
- Let JVMTI validate redefinition arguments before the hooks inspect them
  
  rkennke
  and
  claude
  committed
  76292f4
- Stress-test lazy resolution against live class redefinition
  
  rkennke
  and
  claude
  committed
  f4833eb
- Drop registry-epoch tags; lazy mode requires JFR trace IDs
  
  rkennke
  and
  claude
  committed
  85dd1ad
- Catch a malformed trace ID in LazyTraceIdJfrValidationTest's log parser
  
  rkennke
  and
  claude
  committed
  45c3dd9
- Add working plan for combining #864 and #867
  
  committed
  f428e7b
- Resolve raw frames from VM metadata instead of allocating jmethodIDs
  
  committed
  80940ec
- Update the combined plan: PR structure, phase 1 status, Linux hand-over
  
  committed
  1a44b70
- Run LazyRedefinitionStressTest on JDK 8
  
  rkennke
  and
  claude
  committed
  fd9dfc5
- Count lazy frames whose Method* can no longer be read
  
  rkennke
  and
  claude
  committed
  35b44ee
- Retry trace-ID calibration on fresh array dimensions
  
  rkennke
  and
  claude
  committed
  ca557cb
- Fail on unparsable child-JVM output instead of skipping
  
  rkennke
  and
  claude
  committed
  9c8acd3
- Name hidden classes as JVMTI does when resolving raw frames
  
  rkennke
  and
  claude
  committed
  b13bc80
- Remove the working plan document
  
  committed
  f81edc2
- Report KlassRegistry's table size and purges as counters
  
  rkennke
  and
  claude
  committed
  666dd56
- Pin classes per dump instead of registering every class
  
  rkennke
  and
  claude
  committed
  1eb2f01
- Harden per-dump pinning
  
  rkennke
  and
  claude
  committed
  4e73a94
- Recheck untracked redefinitions after reading a raw frame's metadata
  
  rkennke
  and
  claude
  committed
  4460372
- Clear the OutOfMemoryError of a failed redefinition-mark allocation
  
  rkennke
  and
  claude
  committed
  c93e314
- Harden lazy resolution against review findings
  
  rkennke
  and
  claude
  committed
  364df55
- Tighten lazy-mode Java tests
  
  rkennke
  and
  claude
  committed
  a212fd3
- Count lazy frames refused because their class is too large to scan
  
  rkennke
  and
  claude
  committed
  ed6408d
- Probe fresh classes for the trace ID; set pending exceptions aside
  
  rkennke
  and
  claude
  committed
  a154d17
- Merge branch 'main' into investigate/lazy-jmethodid-vm-resolution
  jbachorik
  authored
  99a74ec
- Close the pre-lazy redefinition window; log lazy-mode fallbacks
  
  rkennke
  and
  claude
  committed
  337b79b

Commits

Commits on Oct 21, 2026