https://github.com/sr-lab/iris-jellyfish

Extension of atomic triples in Iris with atomic postconditions and formal verification of the Lazy JellyFish skip list
https://github.com/sr-lab/iris-jellyfish

concurrent-data-structure coq formal-verification logical-atomicity

Last synced: 3 months ago
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Extension of atomic triples in Iris with atomic postconditions and formal verification of the Lazy JellyFish skip list

• Host: GitHub
• URL: https://github.com/sr-lab/iris-jellyfish
• Owner: sr-lab
• License: gpl-3.0
• Created: 2022-01-14T10:50:43.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2024-09-15T15:15:03.000Z (4 months ago)
• Last Synced: 2024-09-30T20:44:32.217Z (3 months ago)
• Topics: concurrent-data-structure, coq, formal-verification, logical-atomicity
• Language: Coq
• Homepage:
• Size: 695 KB
• Stars: 5
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Atomic Postconditions: Resourceful Reasoning beyond Linearization Points

## Formal Verification of the Lazy JellyFish Skip List in Iris

Artifact which extends the atomic triples from Iris with atomic postconditions, containing mechanized proofs for our elaborate case study: the Lazy JellyFish skip list, a concurrent map implementation. We also present the proofs for a simpler lazy set data structure to showcase how our arguments evolve from a simple linked list to a complex skip list. To compile this Coq development, simply run `make`.

### Prerequisites

This development is known to compile with

- Coq 8.19.1

- Iris 4.2.0

### Directory Structure

The `lib/` directory contains definitions and lemmas required for both structures.

- `argmax.v`: Definition of and facts about the `argmax` resource algebra.

- `gmap.v`: Additional facts about the `gmap` resource algebra.

- `zrange.v`: Definition of and facts about sets containing a range of integers.

The `atomic/` directory contains an alternative definition of logical atomicity in Iris.

- `update.v`: Definition of and facts about atomic updates. We extend the previous definition by defining atomic postconditions.

- `weakestpre.v`: Definition of and facts about atomic triples based on the new definition of atomic updates. These triples also support private postconditions.

- `proofmode.v`: Ensures that the `awp_apply` tactic refers to the new definition for atomic triples.

- `lock.v`: Alternative logically atomic specification for locks without the use of an invariant.

The `lazy_list/` and `jelly_fish/` directories contain the proofs for the lazy set and JellyFish map, respectively. Each of these directories is structured as:

- `code.v`: File with code for the data structure.

- `inv.v`: File describing the invariant resources.

- `spec/`: Directory with the proofs of atomic triples for the data structure's logically atomic specification.

- `rw_client/`: Directory with a client specification built from the logically atomic specification. This specification supports read-read and write-write concurrency, as shown by verifying a simple client example.