lighthouse v0.8.3 releases: Code Coverage Explorer for IDA Pro

Lighthouse – Code Coverage Explorer for IDA Pro

Overview

Lighthouse is a code coverage plugin for IDA Pro. The plugin leverages IDA as a platform to map, explore, and visualize externally collected code coverage data when symbols or source may not be available for a given binary.

This plugin is labelled only as a prototype and IDA / Qt code example for the community.

Special thanks to @0vercl0k for the inspiration.

Changelog

v0.8.3

|- IDA 7.2 compatibility
|- Updated Lighthouse to work on Binja dev (breaks stable…)
|- Fixes issues with parsing newer drcov logs
|- Updated Pintool makefile for newer versions of GCC
|- Updated documentation regarding pintool
|- Minor improvements to Frida coverage script
|- Fixed edge case where a division by zero could occur when computing coverage mapping
|- Fixed edge case where the painter thread could crash if user cursor was in an unexpected place

Download

Installation

Install Lighthouse into the IDA plugins folder.

  • git clone https://github.com/gaasedelen/lighthouse.git
  • Copy the contents of the plugin folder to the IDA plugins folder
    • On Windows, the folder is at C:\Program Files (x86)\IDA 6.8\plugins
    • On MacOS, the folder is at /Applications/IDA\ Pro\ 6.8/idaq.app/Contents/MacOS/plugins
    • On Linux, the folder may be at /opt/IDA/plugins/

The plugin is platform agnostic but has only been tested on Windows for IDA 6.8 –> 7.0

Usage

Lighthouse loads automatically when an IDB is opened, installing a handful of menu entries into the IDA interface.

Lighthouse Menu Entries

These are the entry points for a user to load and view coverage data.

– File –> Load file –> Code coverage file…
– File –> Load file –> Code coverage batch…
– View –> Open subviews –> Coverage Overview

A batch load can quickly aggregate hundreds (thousands?) of collected coverage files into a single composite at load time.

Coverage Painting

Lighthouse ‘paints’ the active coverage data across the three major IDA views as applicable. Specifically, the Disassembly, Graph, and Pseudocode views.

Lighthouse Coverage Painting

Coverage Overview

The Coverage Overview is a dockable widget that provides a function level view of the active coverage data for the database.

Lighthouse Coverage Overview

This table can be sorted by column, and entries can be double-clicked to jump to their corresponding disassembly.

Coverage Composition

Building relationships between multiple sets of coverage data often distills deeper meaning than their individual parts. The shell at the bottom of the Coverage Overview provides an interactive means of constructing these relationships.

Lighthouse Coverage Composition

Pressing enter on the shell will evaluate and save a user constructed composition.

Composition Syntax

Coverage composition or Composing as demonstrated above is achieved through a simple expression grammar and ‘shorthand’ coverage symbols (A to Z) on the composing shell.

Grammar Tokens

  • Logical Operators: |, &, ^, –
    Coverage Symbol: A, B, C, …, Z
    Coverage Range: A,C, Q,Z, …
  • Parenthesis: (…)

Example Compositions

  • A & B
  • (A & B) | C
  • (C & (A – B)) | (F,H & Q)

The evaluation of the composition may occur right to left, parenthesis are suggested for potentially ambiguous expressions.

Hot Shell

Additionally, there is a ‘Hot Shell’ mode that asynchronously evaluates and caches user compositions in real-time.

Lighthouse Hot Shell

The hot shell serves as a natural gateway into the unguided exploration of composed relationships.

Search

Using the shell, one can search and filter the functions listed in the coverage table by prefixing their query with /.

Lighthouse Search

The head of the shell will show an updated coverage % computed only from the remaining functions. This is useful when analyzing coverage for specific function families.

Jump

Entering an address or function name into the shell can be used to jump to corresponding function entries in the table.

Lighthouse Jump

Coverage ComboBox

Loaded coverage data and user-constructed compositions can be selected or deleted through the coverage combobox.

Lighthouse Coverage ComboBox

Copyright (c) 2017 Markus Gaasedelen

Source: https://github.com/gaasedelen/

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