async-profiler/async-profiler v3.0

Binary launcher and AsyncGetCallTrace replacement

on GitHub

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