python-stapsdt

Create USDT probes and instrument your Python application dynamically.

Dependencies

At the moment this package only runs on Linux and requires libstapsdt to be installed to create runtime probes.

Ubuntu 16.04

To install libstapsdt, run:

sudo add-apt-repository ppa:sthima/oss
sudo apt-get update
sudo apt-get install libstapsdt0 libstapsdt-dev

Other

Build from libstapsdt.

Install

pip install stapsdt

Example

The following code will create a probe named firstProbe.

from time import sleep

import stapsdt

provider = stapsdt.Provider("pythonapp")
probe = provider.add_probe(
    "firstProbe", stapsdt.ArgTypes.uint64, stapsdt.ArgTypes.int32)
provider.load()


while True:
    print("Firing probe...")
    if probe.fire("My little probe", 42):
        print("Probe fired!")
    sleep(1)

You can then trace this probe with any tool able to trace Systemtap's probes. Here's an example with eBPF/bcc:

sudo trace -p PID 'u::firstProbe "%s - %d", arg1, arg2'