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Lei, HUANG
21aed0371f
* feat(pprof): switch CPU profiler to framehop unwinder Replace the default libgcc-based unwinder in pprof-rs with the framehop unwinder, which is designed to be async-signal-safe: - framehop performs no heap allocation during unwinding (MustNotAllocateDuringUnwind) - It handles prologue/epilogue interruption correctly - It falls back to frame-pointer unwinding when CFI is unavailable - It does not depend on libgcc's unwind implementation, which is documented as not signal-safe (see tikv/pprof-rs#36) Bump pprof from 0.14 to 0.15 in all three consumers (common-pprof, cmd, servers) to unify on a single version. pprof 0.15 also replaces parking_lot with spin-rs to avoid a potential profiler deadlock (#268). This addresses the libgcc_s.so.1 #GP crash observed in production when CPU profiling is active, by eliminating the libgcc unwinder from the signal handler path entirely. Signed-off-by: Lei, HUANG <ratuthomm@gmail.com> * fix(pprof): gate framehop-unwinder to supported targets framehop-unwinder is only available on x86_64/aarch64 Linux/macOS. Enabling it unconditionally for all Unix targets breaks the build on riscv64 and other platforms: pprof disables its backtrace-rs fallback when framehop-unwinder is set, but the framehop module is not compiled on unsupported targets, leaving no TraceImpl implementation. Split the pprof dependency: the base target.'cfg(unix)' block carries the common features (flamegraph, prost-codec, protobuf), and a separate target block adds framehop-unwinder only on supported targets. Cargo unions features from both blocks on matching targets, so x86_64 and aarch64 Linux/macOS get the full feature set while other Unix targets fall back to the default backtrace-rs implementation. Addresses review comment discussion_r3987313632. Signed-off-by: Lei, HUANG <ratuthomm@gmail.com> --------- Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>