fx-crash-sig

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