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Documents authored by Balzer, Stephanie

Document
Artifact
DOI: 10.4230/DARTS.8.2.14
Ferrite: A Judgmental Embedding of Session Types in Rust (Artifact)

Authors: Ruo Fei Chen, Stephanie Balzer, and Bernardo Toninho

Published in: DARTS, Volume 8, Issue 2, Special Issue of the 36th European Conference on Object-Oriented Programming (ECOOP 2022)

Abstract
This artifact provides a VirtualBox image containing the snapshots of source code for Ferrite and Servo at the time the main paper was published.
Cite as

Ruo Fei Chen, Stephanie Balzer, and Bernardo Toninho. Ferrite: A Judgmental Embedding of Session Types in Rust (Artifact). In Special Issue of the 36th European Conference on Object-Oriented Programming (ECOOP 2022). Dagstuhl Artifacts Series (DARTS), Volume 8, Issue 2, pp. 14:1-14:2, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022)

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@Article{chen_et_al:DARTS.8.2.14,
  author =	{Chen, Ruo Fei and Balzer, Stephanie and Toninho, Bernardo},
  title =	{{Ferrite: A Judgmental Embedding of Session Types in Rust (Artifact)}},
  pages =	{14:1--14:2},
  journal =	{Dagstuhl Artifacts Series},
  ISSN =	{2509-8195},
  year =	{2022},
  volume =	{8},
  number =	{2},
  editor =	{Chen, Ruo Fei and Balzer, Stephanie and Toninho, Bernardo},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DARTS.8.2.14},
  URN =		{urn:nbn:de:0030-drops-162125},
  doi =		{10.4230/DARTS.8.2.14},
  annote =	{Keywords: Session Types, Rust, DSL}
}
Document
DOI: 10.4230/LIPIcs.ECOOP.2022.22
Ferrite: A Judgmental Embedding of Session Types in Rust

Authors: Ruo Fei Chen, Stephanie Balzer, and Bernardo Toninho

Published in: LIPIcs, Volume 222, 36th European Conference on Object-Oriented Programming (ECOOP 2022)

Abstract
Session types have proved viable in expressing and verifying the protocols of message-passing systems. While message passing is a dominant concurrency paradigm in practice, real world software is written without session types. A limitation of existing session type libraries in mainstream languages is their restriction to linear session types, precluding application scenarios that demand sharing and thus aliasing of channel references. This paper introduces Ferrite, a shallow embedding of session types in Rust that supports both linear and shared sessions. The formal foundation of Ferrite constitutes the shared session type calculus SILL_𝖲, which Ferrite encodes via a novel judgmental embedding technique. The fulcrum of the embedding is the notion of a typing judgment that allows reasoning about shared and linear resources to type a session. Typing rules are then encoded as functions over judgments, with a valid typing derivation manifesting as a well-typed Rust program. This Rust program generated by Ferrite serves as a certificate, ensuring that the application will proceed according to the protocol defined by the session type. The paper details the features and implementation of Ferrite and includes a case study on implementing Servo’s canvas component in Ferrite.
Cite as

Ruo Fei Chen, Stephanie Balzer, and Bernardo Toninho. Ferrite: A Judgmental Embedding of Session Types in Rust. In 36th European Conference on Object-Oriented Programming (ECOOP 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 222, pp. 22:1-22:28, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022)

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@InProceedings{chen_et_al:LIPIcs.ECOOP.2022.22,
  author =	{Chen, Ruo Fei and Balzer, Stephanie and Toninho, Bernardo},
  title =	{{Ferrite: A Judgmental Embedding of Session Types in Rust}},
  booktitle =	{36th European Conference on Object-Oriented Programming (ECOOP 2022)},
  pages =	{22:1--22:28},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-225-9},
  ISSN =	{1868-8969},
  year =	{2022},
  volume =	{222},
  editor =	{Ali, Karim and Vitek, Jan},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ECOOP.2022.22},
  URN =		{urn:nbn:de:0030-drops-162501},
  doi =		{10.4230/LIPIcs.ECOOP.2022.22},
  annote =	{Keywords: Session Types, Rust, DSL}
}
Document
DOI: 10.4230/LIPIcs.CONCUR.2018.30
A Universal Session Type for Untyped Asynchronous Communication

Authors: Stephanie Balzer, Frank Pfenning, and Bernardo Toninho

Published in: LIPIcs, Volume 118, 29th International Conference on Concurrency Theory (CONCUR 2018)

Abstract
In the simply-typed lambda-calculus we can recover the full range of expressiveness of the untyped lambda-calculus solely by adding a single recursive type U = U -> U. In contrast, in the session-typed pi-calculus, recursion alone is insufficient to recover the untyped pi-calculus, primarily due to linearity: each channel just has two unique endpoints. In this paper, we show that shared channels with a corresponding sharing semantics (based on the language SILL_S developed in prior work) are enough to embed the untyped asynchronous pi-calculus via a universal shared session type U_S. We show that our encoding of the asynchronous pi-calculus satisfies operational correspondence and preserves observable actions (i.e., processes are weakly bisimilar to their encoding). Moreover, we clarify the expressiveness of SILL_S by developing an operationally correct encoding of SILL_S in the asynchronous pi-calculus.
Cite as

Stephanie Balzer, Frank Pfenning, and Bernardo Toninho. A Universal Session Type for Untyped Asynchronous Communication. In 29th International Conference on Concurrency Theory (CONCUR 2018). Leibniz International Proceedings in Informatics (LIPIcs), Volume 118, pp. 30:1-30:18, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)

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@InProceedings{balzer_et_al:LIPIcs.CONCUR.2018.30,
  author =	{Balzer, Stephanie and Pfenning, Frank and Toninho, Bernardo},
  title =	{{A Universal Session Type for Untyped Asynchronous Communication}},
  booktitle =	{29th International Conference on Concurrency Theory (CONCUR 2018)},
  pages =	{30:1--30:18},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-087-3},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{118},
  editor =	{Schewe, Sven and Zhang, Lijun},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.CONCUR.2018.30},
  URN =		{urn:nbn:de:0030-drops-95681},
  doi =		{10.4230/LIPIcs.CONCUR.2018.30},
  annote =	{Keywords: Session types, sharing, pi-calculus, bisimulation}
}
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