[AlexeyKuznetsov-DD]

What Does This Do

Attaches the modifiable-config test agent to test JVMs that also run the JaCoCo coverage agent.

Motivation

The plugin skips attaching when another -javaagent is already present, and it counted JaCoCo as one. So modules with coverage enabled never got the agent, and Config / InstrumenterConfig stayed unmodifiable at load time. Spock modules hid this because ConfigTransformSpockExtension rewrites Config at runtime. Modules with no Spock, such as internal-api once its Groovy is removed, fail with "Config/InstrumenterConfig INSTANCE fields are not modifiable".

Additional Notes

This affects every module's tests, so it is a separate PR. :communication:test (Spock + JUnit, 297 tests) passes with both agents attached.

#13152 (Groovy cleanup for internal-api) is stacked on this one.

Contributor Checklist

• Format the title according to the contribution guidelines
• Assign the type: and (comp: or inst:) labels in addition to any other useful labels
• Avoid using close, fix, or any linking keywords when referencing an issue
  Use solves instead, and assign the PR milestone to the issue
• Update the CODEOWNERS file on source file addition, migration, or deletion
• Update public documentation with any new configuration flags or behaviors
• Once approved, use merge queue to merge the PR

🤖 Generated with Claude Code

[dd-octo-sts]

🟢 Java Benchmark SLOs — All performance SLOs passed

Suite	Status
Startup	🟢 pass

SLO thresholds are defined here based on automatically generated metrics. A warning is raised when results are within 5% of the threshold.

PR vs. master results

Scenario	Candidate	master	Δ (95% CI of mean)
startup:insecure-bank:iast:Agent	14.01 s	13.99 s	[-0.6%; +0.9%] (no difference)
startup:insecure-bank:tracing:Agent	12.91 s	12.92 s	[-0.7%; +0.5%] (no difference)
startup:petclinic:appsec:Agent	17.88 s	17.70 s	[+0.2%; +1.9%] (maybe worse)
startup:petclinic:iast:Agent	17.55 s	17.78 s	[-2.2%; -0.4%] (maybe better)
startup:petclinic:profiling:Agent	17.67 s	17.57 s	[-0.6%; +1.8%] (no difference)
startup:petclinic:sca:Agent	17.77 s	17.59 s	[+0.1%; +1.9%] (maybe worse)
startup:petclinic:tracing:Agent	16.77 s	16.80 s	[-1.2%; +0.9%] (no difference)

Commit: 852015fe · CI Pipeline · Benchmarking Platform UI

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Load and DaCapo benchmarks can be triggered manually in the GitLab pipeline. Results will appear in the Benchmarking Platform UI after completion.