Binary launcher and AsyncGetCallTrace replacement

v3.0

Features

• #724: Binary launcher asprof
• #751: Profile non-Java processes
• #795: AsyncGetCallTrace replacement
• #719: Classify execution samples into categories in JFR converter
• #855: ctimer mode for accurate profiling without perf_events
• #740: Profile CPU + Wall clock together
• #736: Show targets of vtable/itable calls
• #777: Show JIT compilation task
• #644: RISC-V port
• #770: LoongArch64 port

Improvements

• #733: Make the same libasyncProfiler work with both glibc and musl
• #734: Support raw PMU event descriptors
• #759: Configure alternative profiling signal
• #761: Parse dynamic linking structures
• #723: --clock option to select JFR timestamp source
• #750: --jfrsync may specify a list of JFR events
• #849: Parse concatenated multi-chunk JFRs
• #833: Time-to-safepoint JFR event
• #832: Normalize names of hidden classes / lambdas
• #864: Reduce size of HTML Flame Graph
• #783: Shutdown asprof gracefully on SIGTERM
• Better demangling of C++ and Rust symbols
• DWARF unwinding for ARM64
• JfrReader can parse in-memory buffer
• Support custom events in JfrReader
• An option to read JFR file by chunks
• Record GCHeapSummary events in JFR

Bug fixes

• Workaround macOS crashes in SafeFetch
• Fixed attach to OpenJ9 on macOS
• Support UseCompressedObjectHeaders aka Lilliput
• Fixed allocation profiling on JDK 20.0.x
• Fixed context-switches profiling
• Prefer ObjectSampler to TLAB hooks for allocation profiling
• Improved accuracy of ObjectSampler in --total mode
• Make Flame Graph status line and search results always visible
• loop and timeout options did not work in some modes
• Restart interrupted poll/epoll_wait syscalls
• Fixed stack unwinding issues on ARM64
• Workaround for stale jmethodIDs
• Calculate ELF base address correctly
• Do not dump redundant threads in a JFR chunk
• check action prints result to a file
• Annotate JFR unit types with @ContentType

Binary launcher

v2.10

Draft Release 2.10

Java Heap leak profiler

v2.9

Features

• Java Heap leak profiler
• meminfo command to print profiler's memory usage
• Profiler API with embedded agent as a Maven artifact

Improvements

• --include/--exclude options in the FlameGraph converter
• --simple and --dot options in jfr2flame converter
• An option for agressive recovery of [unknown_Java] stack traces
• Do not truncate signatures in collapsed format
• Display inlined frames under a runtime stub

Bug fixes

• Profiler did not work with Homebrew JDK
• Fixed allocation profiling on Zing
• Various jfrsync fixes
• Symbol parsing fixes
• Attaching to a container on Linux 3.x could fail

Maintenance release

v1.8.8

Bug fixes

• Could not find NativeLibrary_load on JDK 11.0.15

Maintenance release

v2.8.3

Improvements

• Support virtualized ARM64 macOS
• A switch to generate auxiliary events by async-profiler or FlightRecorder in jfrsync mode

Bug fixes

• Could not recreate perf_events after the first failure
• Handle different versions of Zing properly
• Do not call System.loadLibrary, when libasyncProfiler is preloaded

Maintenance release

v2.8.2

Bug fixes

• The same .so works with glibc and musl
• dlopen hook did not work on Arch Linux
• Fixed JDK 7 crash
• Fixed CPU profiling on Zing

Changes

• Mark interpreted frames with _[0] in collapsed output
• Double click selects a method name on a flame graph

Bug fixes and JFR converter improvements

v2.8.1

Improvements

• JFR to pprof converter (contributed by @NeQuissimus)
• JFR converter improvements: time range, collapsed output, pattern highlighting
• %n pattern in file names; limit number of output files
• --lib to customize profiler library path in a container
• profiler.sh list command now works without PID

Bug fixes

• Fixed crashes related to continuous profiling
• Fixed Alpine/musl compatibility issues
• Fixed incomplete collapsed output due to weird locale settings
• Workaround for JDK-8185348

Distinguish interpreted/compiled frames

v2.8

Features

• Mark top methods as interpreted, compiled (C1/C2), or inlined
• JVM TI based allocation profiling for JDK 11+
• Embedded HTTP management server

Improvements

• Re-implemented stack recovery for better reliability
• Add loglevel argument
• Do not mmap perf page in --all-user mode
• Distinguish runnable/sleeping threads in OpenJ9 wall-clock profiler
• --cpu converter option to extract CPU profile from the wall-clock output

OpenJ9 support. DWARF unwinding

v2.7

Features

• Experimental support for OpenJ9 VM
• DWARF stack unwinding

Improvements

• Better handling of VM threads (fixed missing JIT threads)
• More reliable recovery from not_walkable AGCT failures
• Do not accept unknown agent arguments

Continuous profiling

v2.6

Features

• Continuous profiling; loop and timeout options

Improvements

• Reliability improvements: avoid certain crashes and deadlocks
• Smaller and faster agent library
• Minor jfr and jfrsync enhancements (see the commit log)