Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages最新文献_第3页

Freeze after writing: quasi-deterministic parallel programming with LVars 写后冻结:用LVars进行准确定性并行编程

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Pub Date : 2014-01-08 DOI: 10.1145/2535838.2535842

L. Kuper, Aaron Turon, N. Krishnaswami, Ryan Newton

{"title":"Freeze after writing: quasi-deterministic parallel programming with LVars","authors":"L. Kuper, Aaron Turon, N. Krishnaswami, Ryan Newton","doi":"10.1145/2535838.2535842","DOIUrl":"https://doi.org/10.1145/2535838.2535842","url":null,"abstract":"Deterministic-by-construction parallel programming models offer the advantages of parallel speedup while avoiding the nondeterministic, hard-to-reproduce bugs that plague fully concurrent code. A principled approach to deterministic-by-construction parallel programming with shared state is offered by LVars: shared memory locations whose semantics are defined in terms of an application-specific lattice. Writes to an LVar take the least upper bound of the old and new values with respect to the lattice, while reads from an LVar can observe only that its contents have crossed a specified threshold in the lattice. Although it guarantees determinism, this interface is quite limited. We extend LVars in two ways. First, we add the ability to \"freeze\" and then read the contents of an LVar directly. Second, we add the ability to attach event handlers to an LVar, triggering a callback when the LVar's value changes. Together, handlers and freezing enable an expressive and useful style of parallel programming. We prove that in a language where communication takes place through these extended LVars, programs are at worst quasi-deterministic: on every run, they either produce the same answer or raise an error. We demonstrate the viability of our approach by implementing a library for Haskell supporting a variety of LVar-based data structures, together with a case study that illustrates the programming model and yields promising parallel speedup.","PeriodicalId":20683,"journal":{"name":"Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84264829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 54

Probabilistic coherence spaces are fully abstract for probabilistic PCF 概率相干空间对于概率PCF来说是完全抽象的

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Pub Date : 2014-01-08 DOI: 10.1145/2535838.2535865

T. Ehrhard, C. Tasson, Michele Pagani

引用次数: 78

From parametricity to conservation laws, via Noether's theorem 从参数到守恒定律，通过诺特定理

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Pub Date : 2014-01-08 DOI: 10.1145/2535838.2535867

R. Atkey

{"title":"From parametricity to conservation laws, via Noether's theorem","authors":"R. Atkey","doi":"10.1145/2535838.2535867","DOIUrl":"https://doi.org/10.1145/2535838.2535867","url":null,"abstract":"Invariance is of paramount importance in programming languages and in physics. In programming languages, John Reynolds' theory of relational parametricity demonstrates that parametric polymorphic programs are invariant under change of data representation, a property that yields \"free\" theorems about programs just from their types. In physics, Emmy Noether showed that if the action of a physical system is invariant under change of coordinates, then the physical system has a conserved quantity: a quantity that remains constant for all time. Knowledge of conserved quantities can reveal deep properties of physical systems. For example, the conservation of energy is by Noether's theorem a consequence of a system's invariance under time-shifting. In this paper, we link Reynolds' relational parametricity with Noether's theorem for deriving conserved quantities. We propose an extension of System F$omega$ with new kinds, types and term constants for writing programs that describe classical mechanical systems in terms of their Lagrangians. We show, by constructing a relationally parametric model of our extension of F$omega$, that relational parametricity is enough to satisfy the hypotheses of Noether's theorem, and so to derive conserved quantities for free, directly from the polymorphic types of Lagrangians expressed in our system.","PeriodicalId":20683,"journal":{"name":"Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77215993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Modular reasoning about heap paths via effectively propositional formulas 通过有效的命题公式对堆路径进行模块化推理

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Pub Date : 2014-01-08 DOI: 10.1145/2535838.2535854

Shachar Itzhaky, A. Banerjee, N. Immerman, O. Lahav, Aleksandar Nanevski, Shmuel Sagiv

{"title":"Modular reasoning about heap paths via effectively propositional formulas","authors":"Shachar Itzhaky, A. Banerjee, N. Immerman, O. Lahav, Aleksandar Nanevski, Shmuel Sagiv","doi":"10.1145/2535838.2535854","DOIUrl":"https://doi.org/10.1145/2535838.2535854","url":null,"abstract":"First order logic with transitive closure, and separation logic enable elegant interactive verification of heap-manipulating programs. However, undecidabilty results and high asymptotic complexity of checking validity preclude complete automatic verification of such programs, even when loop invariants and procedure contracts are specified as formulas in these logics. This paper tackles the problem of procedure-modular verification of reachability properties of heap-manipulating programs using efficient decision procedures that are complete: that is, a SAT solver must generate a counterexample whenever a program does not satisfy its specification. By (a) requiring each procedure modifies a fixed set of heap partitions and creates a bounded amount of heap sharing, and (b) restricting program contracts and loop invariants to use only deterministic paths in the heap, we show that heap reachability updates can be described in a simple manner. The restrictions force program specifications and verification conditions to lie within a fragment of first-order logic with transitive closure that is reducible to effectively propositional logic, and hence facilitate sound, complete and efficient verification. We implemented a tool atop Z3 and report on preliminary experiments that establish the correctness of several programs that manipulate linked data structures.","PeriodicalId":20683,"journal":{"name":"Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages","volume":"127 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86300743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30

30 years of research and development around Coq 围绕Coq进行了30年的研发

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Pub Date : 2014-01-08 DOI: 10.1145/2578855.2537848

G. Huet, Hugo Herbelin

{"title":"30 years of research and development around Coq","authors":"G. Huet, Hugo Herbelin","doi":"10.1145/2578855.2537848","DOIUrl":"https://doi.org/10.1145/2578855.2537848","url":null,"abstract":"The Coq Proof Assistant is an interactive software system based on higher-order type theory, designed and implemented by a team of French researchers as a continuous effort over the last 30 years. It implements a logical framework, called the Calculus of Inductive Constructions, endowed with notational facilities and a modular structure, allowing its use as a high-level language fit for the development of compositional mathematical components. Explicit potential proof structures are built by execution of ML tactics and tacticals, along a choice of proof schemes combinators. This allows a wide spectrum of inference granularity, from step-by-step inference, to full decision procedures and reflection principles. The validity of such a potential proof is verified by an independent core proof checker, whose meta-theory has been itself formally justified. Coq proofs may be seen as programs in a high-level functional notation, decorated by correctness assertions, and translators into existing programming languages such as OCaml and Haskell are available. Conversely, specialized subsystems allow the development of algorithms with logical assertions, whose validity is checked by Coq. The Coq Proof Assistant, an open-source software development, is in use by a large community of users. Some notable successes have been achieved, in formalized mathematics (4 color theorem, odd order theorem), as well as in software certification (Java Card processing environment, CompCert verification of C compiling).","PeriodicalId":20683,"journal":{"name":"Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages","volume":"75 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78139012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Optimal dynamic partial order reduction 最优动态偏序约简

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Pub Date : 2014-01-08 DOI: 10.1145/2535838.2535845

P. Abdulla, Stavros Aronis, B. Jonsson, Konstantinos Sagonas

引用次数: 182

Closed type families with overlapping equations 具有重叠方程的闭型族

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Pub Date : 2014-01-08 DOI: 10.1145/2535838.2535856

R. Eisenberg, Dimitrios Vytiniotis, Simon Peyton Jones, Stephanie Weirich

引用次数: 85

Bridging boolean and quantitative synthesis using smoothed proof search 用平滑证明搜索桥接布尔和定量综合

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Pub Date : 2014-01-08 DOI: 10.1145/2535838.2535859

Swarat Chaudhuri, Martin Clochard, Armando Solar-Lezama

{"title":"Bridging boolean and quantitative synthesis using smoothed proof search","authors":"Swarat Chaudhuri, Martin Clochard, Armando Solar-Lezama","doi":"10.1145/2535838.2535859","DOIUrl":"https://doi.org/10.1145/2535838.2535859","url":null,"abstract":"We present a new technique for parameter synthesis under boolean and quantitative objectives. The input to the technique is a \"sketch\" --- a program with missing numerical parameters --- and a probabilistic assumption about the program's inputs. The goal is to automatically synthesize values for the parameters such that the resulting program satisfies: (1) a {boolean specification}, which states that the program must meet certain assertions, and (2) a {quantitative specification}, which assigns a real valued rating to every program and which the synthesizer is expected to optimize. Our method --- called smoothed proof search --- reduces this task to a sequence of unconstrained smooth optimization problems that are then solved numerically. By iteratively solving these problems, we obtain parameter values that get closer and closer to meeting the boolean specification; at the limit, we obtain values that provably meet the specification. The approximations are computed using a new notion of smoothing for program abstractions, where an abstract transformer is approximated by a function that is continuous according to a metric over abstract states. We present a prototype implementation of our synthesis procedure, and experimental results on two benchmarks from the embedded control domain. The experiments demonstrate the benefits of smoothed proof search over an approach that does not meet the boolean and quantitative synthesis goals simultaneously.","PeriodicalId":20683,"journal":{"name":"Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90479657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 47

Battery transition systems 电池转换系统

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Pub Date : 2014-01-08 DOI: 10.1145/2535838.2535875

Udi Boker, T. Henzinger, Arjun Radhakrishna

引用次数: 17

An operational and axiomatic semantics for non-determinism and sequence points in C C语言中非确定性和序列点的操作和公理语义

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages Pub Date : 2014-01-08 DOI: 10.1145/2535838.2535878

R. Krebbers

引用次数: 31