angr/angr

Tests/refactoring needed for exception handling

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#1,162 opened on Jul 30, 2018

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help wantedrefactortests

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Description

I implemented exception handling for windows, to emulate SEH to accommodate malware which obfuscated itself through exceptional control flow. This functionality still works last I checked, but it is untested.

Additionally, there is a lot of logic right now in the windows SimOS related to the "exception windup" which ought to be common functionality migrated to SimEngineVEX.

Contributor guide

Research direction
Familiarize yourself with the Windows SEH emulation implementation in angr's Windows SimOS. Then, write unit tests to verify the exception handling behavior for various scenarios. Additionally, examine the exception windup logic in Windows SimOS and propose a refactoring to move common code into SimEngineVEX.
Tech stack
python
Domain
backend
Issue type
Test
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Pythonangr basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70