DynamoRIO/drmemory

Allow setting drfuzz iteration count implicitly based on buffer size with exhaustive mutator

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#1,802 opened on Oct 26, 2015

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Component-DrFuzzType-FeatureUsabilityhelp wanted

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Description

Currently, we allow user to specify the maximum number of repeated iterations for a fuzzing test. However for different input buffer, we may want to have different mutation iterations. One way is to tell maximum number of bits to flip instead of fixed number of iterations. For example, for max 1 bit to flip, a 16-byte input buffer will be repeated 16x8 times, while a 32-byte input buffer will be repeated 32x8 times. For both cases, each bit is flipped once.

Contributor guide

Research direction
Study how drfuzz currently handles iteration count, then implement logic to compute iteration count from buffer size using exhaustive mutator, replacing the fixed user specified count.
Tech stack
c
Domain
testing qa
Issue type
Feature
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.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
Cfuzzing concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50