DEPRECATED: fx-crash-sig

Project status

This project is deprecated as of October 8th, 2024.

https://github.com/mozilla-services/fx-crash-sig/issues/111

The fx-crash-sig library was initially created as part of a summer internship project to look at symbolicating and generating signatures for crash pings. It evolved past that project in a few spurts as it was getting used in different ways.

This project has become difficult to maintain. There isn't much of a test suite. The API isn't conductive to symbolicating crash pings at scale. We don't have time to improve these issues.

Given that, we're deprecating this library. We won't be maintaining it going forward.

If you use this library, we encourage you to replace fx-crash-sig code with:

1. symbolication calls:
   • https://symbolication.services.mozilla.com/
   • https://mozilla-eliot.readthedocs.io/en/latest/symbolication.html
2. signature generation:
   • use socorro-siggen
   • use Crash Stat's Crash Signature API

Project

Symbolicates crash pings and generates signatures.

Take crash ping stack traces and:

1. Use Mozilla Symbolication Service symbolication to symbolicate crash ping stack traces
2. Use socorro-siggen library to generate a crash signature

Project details:

• Code: https://github.com/mozilla-services/fx-crash-sig
• Issues: https://github.com/mozilla-services/fx-crash-sig/issues
• License: MPL v2
• Documentation: This README

Install (from PyPI)

pip install fx-crash-sig

Usage

Example script:

import json

from fx_crash_sig.crash_processor import CrashProcessor

with open("crashping.json") as fp:
    crash_ping = json.load(fp)

crash_processor = CrashProcessor()

signature_result = crash_processor.get_signature(crash_ping)
print(signature_result.signature)

Command line (using sample.json):

cat sample.json | fx-crash-sig

Run this for more command line help:

fx-crash-sig --help

Minimal crash ping structure

The legacy crash ping (the pingsender one--not the glean one) is documented here:

https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/data/crash-ping.html

These are the parts of the legacy crash ping we use:

- normalized_os                (optional)
- payload:
  - metadata:
    - async_shutdown_timeout   (optional)
    - ipc_channel_error        (optional)
    - oom_allocation_size      (optional)
    - moz_crash_reason         (optional)
  - stack_traces:
    - crash_info:
      - crashing_thread
      - type
    - modules[]
      - debug_file
      - debug_id
      - filename
      - base_addr
    - threads[]
      - frames[]
         - ip
         - module_index
         - trust

API

fx_crash_sig.crash_processor

• CrashProcessor: symbolicates and generates signatures for legacy crash pings
  • __init__
    • arg: max_frames: int (40)
    • arg: api_url: str (https://symbolication.services.mozilla.com/symbolicate/v5)
    • arg: verbose: bool
  • get_signature: Takes a crash ping structure, symbolicates it using Mozilla Symbolication Service, generates a signature, and returns the signature result.
    • signature
      • arg: crash_ping: dict
      • returns: siggen.generator.Result
  • symbolicate: Symbolicates the stack traces in a crash ping structure payload.
    • signature
      • arg: crash_ping: dict
      • returns: symbolicated stack traces
  • get_signature_from_symbolicated: Takes the output of symbolicate, generates a signature, and returns the signature result.
    • signature
      • arg: symbolicated: dict
      • returns: siggen.generator.Result

fx_crash_sig.symbolicate

• Symbolicator: symbolicates stack traces
  • __init__
    • arg: max_frames: int (40)
    • arg: api_url: str (https://symbolication.services.mozilla.com/symbolicate/v5)
    • arg: verbose: bool
  • symbolicate: Symbolicates a single stack trace.
    • arg: stack_trace: dict
    • returns: symbolicated stack trace
  • symbolicate_multi: Symbolicates a list of stack traces.
    • arg: stack_traces: list of dicts
    • returns: list of symbolicated traces