# ckb-vm-signal-profiler

Signal based profiler for [ckb-vm](https://github.com/nervosnetwork/ckb-vm). Like [gperftools](https://github.com/gperftools/gperftools), it uses a `SIGPROF` signal handler to suspend running CKB-VM programs so as to gather profiling data. One advantage of this solution, is that it requires no code injections into CKB-VM. However also due to this design choice, this profiler runs on Linux only for the moment.

See [here](./examples/simple.rs) for an example on using this library.

This library inherits a lot of the signal handler related code from [pprof-rs](https://github.com/tikv/pprof-rs) library.

# Notes

* If anything weird happens when loading the generated profiling data, make sure you are using the golang based pprof at [here](https://github.com/google/pprof), not the binary from [gperftools](https://github.com/gperftools/gperftools) with the same name.