v0.31.0

Highlights

1. Custom labels to turn Go profiling labels into pprof labels
2. MUSL support
3. Enhanced python support, especially on arm64 and alpine/MUSL systems
4. Arm64 fixes for PAC mode
5. Synthetic unwinder errors
6. Improved dwarf unwinding by using .debug_frame and .debug_link
7. Fixes for linux 6.8 kernels (verifier errors)

What's Changed

• java: Add groundwork for the naive unwinder by @kakkoyun in #2591
• Use object file pool cache for unwind information by @gnurizen in #2595
• Fix benign but bogus main executable assumption by @gnurizen in #2596
• bpf/unwinder/native: remove duplicated code by @Sylfrena in #2603
• Scripts ergonomics by @gnurizen in #2601
• Various fixes for aarch64 by @umanwizard in #2604
• go.*: Update runtime-data by @kakkoyun in #2610
• Only attempt to profile online CPUs by @umanwizard in #2646
• Fix function end detection by @umanwizard in #2636
• Surface unwind failure reasons in status page by @umanwizard in #2649
• Bump Ainur to fix Go version misdetection by @umanwizard in #2656
• Add a bit more logging/metrics when unwind table adding fails by @umanwizard in #2670
• pkg/profiler/cpu/bpf/maps: Improve too many mappings error message by @brancz in #2675
• Add "unwind failed" synthetic stacks by @umanwizard in #2682
• add failed reasons stacks even when there are no other stacks in the profile by @umanwizard in #2687
• Avoid filling uploadJob channel w/ NoopDebugInfoManager by @gnurizen in #2686
• Fix template test by @gnurizen in #2690
• Fix bug where event processors exit on error by @umanwizard in #2688
• Oops, don't log unconditionally by @umanwizard in #2693
• Fix off-by-one error in chunk splitting by @umanwizard in #2697
• Add "request read" event by @umanwizard in #2705
• Makefile fixes for guix by @umanwizard in #2706
• fast integration by @gnurizen in #2698
• Don't swallow errors from GenerateCompactUnwindTable by @umanwizard in #2718
• minor logging improvements by @umanwizard in #2709
• Run amd64 integration tests on public github actions runners by @brancz in #2720
• remove no-op Close statement by @umanwizard in #2721
• Fix pointer authentication for FP-based unwinding by @umanwizard in #2732
• Fix arm native integration tests by @gnurizen in #2734
• Fix unwinder loading on 6.8 kernels by @umanwizard in #2667
• Bump max per-process mappings up to 2000 by @gnurizen in #2749
• bpf/unwinders/pyperf: Use an LRU map and increase the size by @brancz in #2760
• Properly get return address for leaf frames on ARM during syscalls by @umanwizard in #2761
• Log in another case where we unexpectedly fail to add unwind table by @umanwizard in #2766
• Use both .eh_frame and .debug_frame by @umanwizard in #2717
• Update MAINTAINERS.md by @Sylfrena in #2771
• Fix build ID precedence by @brancz in #2775
• spam opaquify in more places to fix verifier issues on 6.8 by @umanwizard in #2781
• .github: Don't skip building snap if only changing .c files by @brancz in #2783
• Don't use .debug_frame info for Go binaries by @umanwizard in #2782
• Fix Python version detection by @umanwizard in #2794
• feat: add procfs cmdline by @dreamerlzl in #2799
• don't hang on panic in Run() by @umanwizard in #2792
• fix duplicated leaf frame for dwarf unwinding by @umanwizard in #2811
• Get Go custom label offsets dynamically by @umanwizard in #2808
• fix verification on 5.4 by @umanwizard in #2816
• Add Tommy to MAINTAINERS.md by @gnurizen in #2820
• support musl 1.2.5/alpine 3.20 by @gnurizen in #2823
• Musl support by @gnurizen in #2605
• fix go runtime detection to work with containers by @gnurizen in #2815
• Refix 5.4 verifier error by @gnurizen in #2837
• add the stack anyway in the case of truncation for native frames. by @umanwizard in #2850
• Deduplicate list of PIDs in processEventBatcher by @umanwizard in #2845
• If we have should_use_fp_by_default set we need to honor it or we will fail to unwind go binaries with no dwarf info. by @gnurizen in #2858
• memset entire unwind_state by @gnurizen in #2857
• Use arm for skip-check by @gnurizen in #2863
• Use --verbose instead of --debug by @brancz in #2867
• ra-1 fix for FP unwinding by @umanwizard in #2874
• Fix one more case where we should assume we're done walking the stack when we have dwarf info but encounter a pc out of range. by @gnurizen in #2872
• Revert "memset the entire unwind_state to make sure no" by @gnurizen in #2878
• Remove synthetic unwinder error frames from agent and instead generate them in the unwinder with more context by @gnurizen in #2851
• Collect custom labels by @umanwizard in #2833
• fix x86 verification issues with custom labels by @umanwizard in #2886
• fix wrong computation of current goroutine in kernel code on arm by @umanwizard in #2887
• Fix various issues with debuginfo uploading by @umanwizard in #2895
• Fix various panics in DWARF decoding by @umanwizard in #2896
• Increase warning level when failing to fetch unwinder info by @umanwizard in #2892
• Fix golang runtime detection for containers by @umanwizard in #2903

New Contributors

• @umanwizard made their first contribution in #2604

Full Changelog: v0.30.0...v0.31.0