aktowns / probe-stap

SystemTap probes for crystal

probe-stap

Emit Systemtap probes from your crystal application for debugging and performance tracing.

Installation

Add it to Projectfile

deps do
  github "aktowns/probe-stap"
end

Usage

require "probe-stap"

probe_stap_emit(myprobe, "Hello", "World")

then you can monitor using a SystemTap script like the following:

probe process.mark("myprobe") {
	printf("%s %s (%p,%p) \n", user_string($arg1), user_string($arg2), $arg1, $arg2);
}

$ stap -c "myapp" script_file.stp
Hello World (0x40c34c,0x40c36c)

Development

Learning crystal as I go, advice/hints welcome!

Contributing

1. Fork it ( https://github.com/aktowns/probe-stap/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• aktowns Ashley Towns - creator, maintainer