[kaahos]

What does this PR do?:

Captures vtable receivers during ASGCT stub recovery without changing platform defaults. Shares capture with the VM walker and verifies the synthetic frame’s receiver class.

Motivation:

macOS defaults to DWARF/ASGCT, which emitted vtable stubs without receiver metadata.

Additional Notes:

Independent agent review found no verified defects. Compact-header decoding is unchanged. Verification gaps below remain open.

How to test the change?:

./.claude/commands/build-and-summarize :ddprof-test:testDebug -Ptests=VtableReceiverFrameTest

• passed: default/DWARF/VM regression in Debug and Release on macOS arm64, Temurin 26; native Debug/Release suites; formatting and quality checks.
• blocked: ASan (Gradle daemon disappeared); exact Corretto 26.0.1 validation (runtime unavailable).
• unrun: full Java Debug suite.

For Datadog employees:

• If this PR touches code that signs or publishes builds or packages, or handles
  credentials of any kind, I've requested a security review (run the dd:platform-security-review
  skill, or file a request via the PSEC review form).
  bewaire also runs automatically on every PR.
• This PR doesn't touch any of that.
• JIRA: PROF-15828

[datadog-datadog-us1-prod]

❌ Errors

Your PR has failed checks. Please review the issues below and take necessary action before merging.

🚦 3 Pipeline jobs failed

CI Run | test-matrix / test-linux-musl-amd64 (17-librca, release, regular) — 🔄 Retry may pass, looks flaky

View more details · View in GitHub Actions

DDCI - DataDog/java-profiler | reliability-chaos-amd64: [profiler, tcmalloc, 21.0.3-tem]

View more details · View in DDCI

DataDog/java-profiler | reliability-chaos-amd64: [profiler, tcmalloc, 21.0.3-tem]

View more details · View in GitLab

Useful? React with 👍 / 👎

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 49fbcb5 | Docs | View more details | Give us feedback!}

[dd-octo-sts]

✅ All 40 integration tests passed

📊 Dashboard · 👷 Pipeline · 📦 49fbcb51

[dd-octo-sts]

Reliability & Chaos Results

❌ 1 failure(s) detected Pipeline: https://gitlab.ddbuild.io/DataDog/java-profiler/-/pipelines/152103616

❌ chaos: profiler tcmalloc amd64 21 0 3 temXchaos

ddprof jar unavailable (Maven snapshot download failed)

[dd-octo-sts]

Scan-Build Report

User:	runner@runnervmwuk1x
Working Directory:	/home/runner/work/java-profiler/java-profiler/ddprof-lib/src/test/make
Command Line:	make -j4 all
Clang Version:	Ubuntu clang version 21.1.8 (6ubuntu1)
Date:	Tue Nov 10 23:35:53 2026

Bug Summary

Bug Type	Quantity	Display?
All Bugs	2
Logic error
Dereference of null pointer	1
Unused code
Dead initialization	1

Filter Results by File

Reports

Bug Group	Bug Type ▾	File	Function/Method	Line	Path Length
Unused code	Dead initialization	referenceChains.cpp	applyOomRamp	497	1
Logic error	Dereference of null pointer	perfEvents_linux.cpp	unregisterThread	720	26

[dd-octo-sts]

CI Test Results

Run: #42924406212 | Commit: 0c61cc9 | Duration: 25m 45s (longest job)

❌ 1 of 108 test jobs failed

Status Overview

JDK	glibc-aarch64/asan	glibc-aarch64/debug	glibc-aarch64/release	glibc-aarch64/tsan	glibc-amd64/asan	glibc-amd64/debug	glibc-amd64/release	glibc-amd64/tsan	musl-aarch64/debug	musl-aarch64/release	musl-amd64/debug	musl-amd64/release
8	-	-	-	-	✅	✅	✅	✅	-	-	-	-
8-ibm	-	-	-	-	✅	✅	✅	✅	-	-	-	-
8-j9	✅	✅	✅	✅	✅	✅	✅	✅	-	-	-	-
8-librca	-	-	-	-	-	-	-	-	✅	✅	✅	✅
8-orcl	-	-	-	-	✅	✅	✅	✅	-	-	-	-
11	-	-	-	-	✅	✅	✅	✅	-	-	-	-
11-j9	✅	✅	✅	✅	✅	✅	✅	✅	-	-	-	-
11-librca	-	-	-	-	-	-	-	-	✅	✅	✅	✅
17	✅	✅	✅	✅	✅	✅	✅	✅	-	-	-	-
17-graal	✅	✅	✅	✅	✅	✅	✅	✅	-	-	-	-
17-j9	✅	✅	✅	✅	✅	✅	✅	✅	-	-	-	-
17-librca	-	-	-	-	-	-	-	-	✅	✅	✅	❌
21	✅	✅	✅	✅	✅	✅	✅	✅	-	-	-	-
21-graal	✅	✅	✅	✅	✅	✅	✅	✅	-	-	-	-
21-librca	-	-	-	-	-	-	-	-	✅	✅	✅	✅
25	✅	✅	✅	✅	✅	✅	✅	✅	-	-	-	-
25-graal	✅	✅	✅	✅	✅	✅	✅	✅	-	-	-	-
25-librca	-	-	-	-	-	-	-	-	✅	✅	✅	✅

Legend: ✅ passed | ❌ failed | ⚪ skipped | 🚫 cancelled

❌ Failing tests

Test	Cells	Message
VtableReceiverFrameTest.testVtableReceiverFrameInCpuSamplesDwarf___5_	musl-17-librca-release-amd64	Test execution #5 (of up to 5 with at least 1 successes) failed ~> test fails - see cause for details

Retried 1 of 102 cells.

Failed Jobs

• musl-amd64/release / 17-librca — view logs

Summary: Total: 108 | Passed: 107 | Failed: 1

---

Updated: 2026-11-11 00:03:16 UTC

[kaahos]

@codex review

[chatgpt-codex-connector]

Codex Review Summary: ✅ Completed

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-11-10T15:42:03.181581Z	89838e9	Manual request

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review" or "@codex security review".

Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Chef's kiss.

Reviewed commit: 89838e914e

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[datadog-datadog-us1-prod]

More details

The completed static review found no actionable defect in the interrupted-frame checks, receiver capture, or recovery-budget handling. Runtime behavior was not independently exercised.

Was this helpful? React 👍 or 👎

_{Open Bits AI session}

_{🤖 Bits Code Review · Commit 89838e9}

[datadog-datadog-us1-prod]

More details

Receiver capture guards against stale interrupted registers and reserves capacity for recovery or an error frame. Runtime integration and sanitizer behavior were not revalidated.

Was this helpful? React 👍 or 👎

_{Open Bits AI session}

_{🤖 Bits Code Review · Commit 49fbcb5}