Skip to main content

On-demand system call tracing for Python programs.

Project description

Ptracer is a library providing on-demand system call tracing in Python programs.

Basic Usage

import traceback
import ptracer

def callback(syscall):
    print('{}({}) -> {}'.format(
        syscall.name,
        ', '.join(repr(arg.value) for arg in syscall.args),
        syscall.result.text))
    print('Traceback: ')
    print(''.join(traceback.format_list(syscall.traceback)))

with ptracer.context(callback):
    open('/dev/null', 'wb')

Filtering

Ptracer allows elaborate syscall filtering via the filter argument:

flt = [
    ptracer.SysCallPattern(
        name='open',
        args=[
            re.compile(b'/tmp/.*'),
            lambda arg: arg.value & os.O_WRONLY
        ],
        result=lambda res: res.value > 0
    )
]

with ptracer.context(callback, filter=flt):
    # traced code
    ...

In the above example, ptracer will invoke the callback only for successful attempts to open files in the “/tmp” directory for writing.

Documentation

The documentation is available on ptracer.readthedocs.io.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

ptracer-0.6.tar.gz (29.6 kB view hashes)

Uploaded source

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page