MozillaSecurity / MozillaSecurity/FuzzManager

When symbols are missing, use library filename instead of "??"

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#216 2 comments 0 reactions 0 assignees View on GitHub

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bug FTB
Dominant language
Python
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208
Forks
48
Avg merge
23h 5m
Merged PRs (30d)
2

Description

To create a FuzzManager signature for https://bugzilla.mozilla.org/show_bug.cgi?id=1288589 (as seen by minidump_stackwalk), I'd like to specify that the crash has to have AppleIntelHD3000GraphicsGLDriver on the stack so I can still find bugs on computers with other graphics cards. But currently, MinidumpCrashInfo just creates "??" entries when it doesn't have symbols for system libraries.

I guess library+offset would make signatures change too often, and some debuggers unhelpfully give library+address. So I'm suggesting using just the library name, as an improvement over using "??".

Started: https://gist.github.com/jruderman/16f50b51b822eeb0591516c160ab18ca

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating MinidumpCrashInfo and reviewing the linked gist for the missing-symbol behavior. Trace how stack entries are produced when system-library symbols are unavailable, then inspect the relevant existing tests. Done means those entries use the library filename instead of "??" without adding offsets or addresses.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
testing-qa
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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