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feat: support perf walltime in Java - #261
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not-matthias merged 4 commits intoMar 25, 2026
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Pull request overview
Adds Java support for perf-based walltime profiling by configuring JVM frame pointers and perf map generation, auto-detecting Java commands for frame-pointer unwinding, and fixing env variable quoting for values with spaces.
Changes:
- Set
JAVA_TOOL_OPTIONSwith JVM flags for frame pointer preservation and perf map generation in walltime mode - Auto-select frame-pointer unwinding for gradle/java/maven commands in perf runner
- Quote environment variable values in the env file to handle spaces, and add
/proc/pid/mapsdebug logging
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| src/executor/helpers/env.rs | Adds JAVA_TOOL_OPTIONS env var for walltime mode |
| src/executor/wall_time/perf/mod.rs | Auto-detect Java commands for FP unwinding; add debug proc maps logging |
| src/executor/helpers/run_with_env.rs | Quote env values with single quotes in generated env file |
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Replace substring `contains()` checks with token-based exact matching to prevent false positives (e.g. "javascript" matching "java"). Also adds gradlew, mvnw, python3 to the recognized executables.
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