uftrace: A function graph tracer for C/C++ userspace programs
summary
uftrace is an open‑source function graph tracer for C/C++ that instruments binaries with -pg/mcount and records precise, timestamp-based entry/exit times so durations are exact rather than sampled. It supports live recording and replay, argument and return-value capture, summaries with total/self time and call counts, and a time filter (example -t 200ns or -t 100ms) to drop short calls. Traces export via --chrome JSON and open in chrome://tracing; examples show STL refcount phases, recursive Fibonacci return values, clang and V8 internals.
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