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Changelog
async-profiler
Sampling CPU and HEAP profiler for Java featuring AsyncGetCallTrace + perf_events
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Method tracing and system-wide process sampling
v4.2
Features
- Java Method Tracing and Latency Profiling
- #1421: Latency profiling
- #1435: Allow wildcards in Instrument profiling engine
- #1499:
--trace option with per-method latency threshold
- System-wide process sampling on Linux
- #1411:
--proc option to record profiler.ProcessSample events
- VMStructs stack walker by default
- #1539: Use VMStructs stack walking mode by default
- #1537: Support
comptask and vtable features
- #1517: Use JavaFrameAnchor to find top Java frame
- #1449: Special handling of prologue and epilogue of compiled methods
Improvements
- #1475: Add
CPUTimeSample event support to jfrconv
- #1414: Per-thread flamegraph option in JFR heatmap converter
- #1526: Expose JfrReader dictionary that maps osThreadId to javaThreadId
- #1448: Thread name in OpenTelemetry output
#1413: Add time_nanos and duration_nanos to OTLP profiles#1450: Unwind dylib stubs as empty frames on macOS#1416: Add synthetic symbols for Mach-O stubs/trampolinesAllow cross-compilation for 32-bit platformsBug fixes
- #1515: Fix UnsatisfiedLinkError when tmpdir is set to a relative path
- #1500: Detect if
calloc calls malloc for nativemem profiling
- #1427: Re-implement SafeAccess crash protection
- #1417: Two wall-clock profilers interfere with each other
Project Infrastructure
- #1527: GHA: replace macos-13 with macos-15-intel
- #1510: Add option to retry tests
- #1508: Add more GHA jobs to cover JDK versions on ARM
- #1502: Fix job dependencies between integration tests and builds
- #1466: Add Liberica JDK on Alpaquita Linux to the CI
- Made integration tests more stable overall