检索结果-内蒙古大学图书馆

42nd acm sigplan International conference on programming language design and implementation (pldi)

作者： Renner, John Sanchez-Stern, Alex Brown, Fraser Lerner, Sorin Stefan, Deian Univ Calif San Diego La Jolla CA 92093 USA

ISBN: (纸本)9781450383912

Web applications often handle large amounts of sensitive user data. Modern secure web frameworks protect this data by (1) using declarative languages to specify security policies alongside database schemas and (2) automatically enforcing these policies at runtime. Unfortunately, these frameworks do not handle the very common situation in which the schemas or the policies need to evolve over time-and updates to schemas and policies need to be performed in a carefully coordinated way. Mistakes during schema or policy migrations can unintentionally leak sensitive data or introduce privilege escalation bugs. In this work, we present a domain-specific language (Scooter) for expressing schema and policy migrations, and an associated SMT-based verifier (Sidecar) which ensures that migrations are secure as the application evolves. We describe the design of Scooter and Sidecar and show that our framework can be used to express realistic schemas, policies, and migrations, without giving up on runtime or verification performance.

关键词： database migration verification secure ORM domain-specific language

来源：评论

学校读者我要写书评

暂无评论

programming Ad-hoc Networks of mobile and resource-constrained devices

Programming Ad-hoc Networks of mobile and resource-constrain...

引用

conference on programming language design and implementation

作者： Ni, Y Kremer, U Stere, A Iftode, L Rutgers State Univ Dept Comp Sci Piscataway NJ 08854 USA

Ad-hoc networks of mobile devices such as smart phones and PDAs represent a new and exciting distributed system architecture. Building distributed applications on such an architecture poses new design challenges in programming models, languages, compilers, and runtime systems. This paper discusses SpatialViews, a high-level language designed for programming mobile devices connected through a wireless ad-hoc network. SpatialViews allows specification of virtual networks with nodes providing desired services and residing in interesting spaces. These nodes are discovered dynamically with user-specified time constraints and quality of result (QoR). The programming model supports "best-effort" semantics, i.e., different executions of the same program may result in "correct" answers of different quality. It is the responsibility of the compiler and runtime system to produce a high-quality answer for the particular network and resource conditions encountered during program execution. Four applications, which exercise different features of the SpatialViews language, are presented to demonstrate the expressiveness of the language and the efficiency of the compiler generated code. The applications are an application that collects and aggregates sensor data in network, an application that performs dynamic service installation, a mobile camera application that supports computation offloading for image understanding, and an augmented-reality (AR) Pacman game. The efficiency of the compiler generated code is verified through simulation and physical measurements. The reported results show that SpatialViews is an expressive and effective language for ad-hoc networks. In addition, compiler optimizations can significantly improve response times and energy consumption.

关键词： Ad-hoc Networks MANET location-awareness service discovery quality of result

来源：评论

学校读者我要写书评

暂无评论

Termination proofs for systems code 06

Termination proofs for systems code

引用

pldi 2006 - 2006 acm sigplan conference on programming language design and implementation

作者： Cook, Byron Podelski, Andreas Rybalchenko, Andrey Microsoft Research Max-Planck-Institut für Informatik Germany Max-Planck-Institut für Informatik EPFL Germany

ISBN: (纸本)1595933204

Program termination is central to the process of ensuring that systems code can always react. We describe a new program termination prover that performs a path-sensitive and context-sensitive program analysis and provides capacity for large program fragments (i.e. more than 20,000 lines of code) together with support for programming language features such as arbitrarily nested loops, pointers, function-pointers, side-effects, etc. We also present experimental results on device driver dispatch routines from the Windows operating system. The most distinguishing aspect of our tool is how it shifts the balance between the two tasks of constructing and respectively checking the termination argument. Checking becomes the hard step. In this paper we show how we solve the corresponding challenge of checking with binary reachability analysis. Copyright © 2006 acm.

关键词： Computer programming

来源：评论

学校读者我要写书评

暂无评论

Improving JavaScript Performance by Deconstructing the Type System 14

Improving JavaScript Performance by Deconstructing the Type ...

引用

35th acm sigplan conference on programming language design and implementation (pldi)

作者： Ahn, Wonsun Choi, Jiho Shull, Thomas Garzaran, Maria J. Torrellas, Josep Univ Illinois Champaign IL 61820 USA

ISBN: (纸本)9781450327848

Increased focus on Java Script performance has resulted in vast performance improvements for many benchmarks. However, for actual code used in websites, the attained improvements often lag far behind those for popular benchmarks. This paper shows that the main reason behind this shortfall is how the compiler understands types. Java Script has no concept of types, but the compiler assigns types to objects anyway for ease of code generation. We examine the way that the Chrome V8 compiler defines types, and identify two design decisions that are the main reasons for the lack of improvement: (1) the inherited prototype object is part of the current object's type definition, and (2) method bindings are also part of the type definition. These requirements make types very unpredictable, which hinders type specialization by the compiler. Hence, we modify V8 to remove these requirements, and use it to compile the Java Script code assembled by JSBench from real websites. On average, we reduce the execution time of JSBench by 36%, and the dynamic instruction count by 49%.

关键词： design languages Performance Java Script Scripting language Dynamic Typing Type Specialization Hidden Class Inline Caching Prototype

来源：评论

学校读者我要写书评

暂无评论

pldi'11 - Proceedings of the 2011 acm conference on programming language design and implementation

PLDI'11 - Proceedings of the 2011 ACM Conference on Programm...

引用

32nd acm conference on programming language design and implementation, pldi 2011

ISBN: (纸本)9781450306638

The proceedings contain 55 papers. The topics discussed include: commutative set: a language extension for implicit parallel programming;the Tao of parallelism in algorithms;data representation synthesis;synthesizing geometry constructions;synthesis of loop-free programs;generalized just-in-time trace compilation using a parallel task farm in a dynamic binary translator;brainy: effective selection of data structures;an SSA-based algorithm for optimal speculative code motion under an execution profile;caisson: a hardware description language for secure information flow;steno: automatic optimization of declarative queries;languages as libraries;automatic CPU-GPU communication management and optimization;automatic compilation of MATLAB programs for synergistic execution on heterogeneous processors;partial-coherence abstractions for relaxed memory models;and probabilistic, modular and scalable inference of typestate specifications.

关键词： Optimal systems

来源：评论

学校读者我要写书评

暂无评论

Memory management with explicit regions

Memory management with explicit regions

引用

Proceedings of the 1998 Annual acm sigplan conference on programming language design and implementation, pldi

作者： Gay, David Aiken, Alex Univ of California Berkeley United States

Much research has been devoted to studies of and algorithms for memory management based on garbage collection or explicit allocation and deallocation. An alternative approach, region-based memory management, has been known for decades, but has not been well-studied. In a region-based system each allocation specifies a region, and memory is reclaimed by destroying a region, freeing all the storage allocated therein. We show that on a suite of allocation-intensive C programs, regions are competitive with malloc/free and sometimes substantially faster. We also show that regions support safe memory management with low overhead. Experience with our benchmarks suggests that modifying many existing programs to use regions is not difficult.

关键词： Computer systems programming

来源：评论

学校读者我要写书评

暂无评论

Unfold/fold transformations and loop optimization of logic programs 88

Unfold/fold transformations and loop optimization of logic p...

引用

acm sigplan conference on programming language design and implementation, pldi 1988

作者： Debray, Saumya K. Department of Computer Science University of Arizona TucsonAZ85721 United States

ISBN: (纸本)0897912691

Programs typically spend much of their execution time in loops. This makes the generation of efficient code for loops essential for good performance. Loop optimization of logic programming languages is complicated by the fact that such languages lack the iterative constructs of traditional languages, and instead use recursion to express loops. In this paper, we examine the application of unfold/fold transformations to three kinds of loop optimization for logic programming languages: recursion removal, loop fusion and code motion out of loops. We describe simple unfold/fold transformation sequences for these optimizations that can be automated relatively easily. In the process, we show that the properties of unification and logical variables can sometimes be used to generalize, from traditional languages, the conditions under which these optimizations may be carried out. Our experience suggests that such source-level transformations may he used as an effective tool for the optimization of logic programs. © 1988 acm.

关键词： Logic programming

来源：评论

学校读者我要写书评

暂无评论

Test-Driven Synthesis 14

Test-Driven Synthesis

引用

35th acm sigplan conference on programming language design and implementation (pldi)

作者： Perelman, Daniel Gulwani, Sumit Grossman, Dan Provost, Peter Univ Washington Seattle WA 98195 USA Microsoft Corp Mountain View CA USA

ISBN: (纸本)9781450327848

programming-by-example technologies empower end-users to create simple programs merely by providing input/output examples. Existing systems are designed around solvers specialized for a specific set of data types or domain-specific language (DSL). We present a program synthesizer which can be parameterized by an arbitrary DSL that may contain conditionals and loops and therefore is able to synthesize programs in any domain. In order to use our synthesizer, the user provides a sequence of increasingly sophisticated input/output examples along with an expert-written DSL definition. These two inputs correspond to the two key ideas that allow our synthesizer to work in arbitrary domains. First, we developed a novel iterative synthesis technique inspired by test-driven development-which also gives our technique the name of test-driven synthesis-where the input/output examples are consumed one at a time as the program is refined. Second, the DSL allows our system to take an efficient component-based approach to enumerating possible programs. We present applications of our synthesis methodology to end-user programming for transformations over strings, XML, and table layouts. We compare our synthesizer on these applications to state-of-the-art DSL-specific synthesizers as well to the general purpose synthesizer Sketch.

关键词： languages Experimentation program synthesis end-user programming test driven development

来源：评论

学校读者我要写书评

暂无评论

Reticle: A Virtual Machine for programming Modern FPGAs 2021

Reticle: A Virtual Machine for Programming Modern FPGAs

引用

42nd acm sigplan International conference on programming language design and implementation (pldi)

作者： Vega, Luis McMahan, Joseph Sampson, Adrian Grossman, Dan Ceze, Luis Univ Washington Seattle WA 98195 USA Cornell Univ Ithaca NY 14853 USA

ISBN: (纸本)9781450383912

Modern field-programmable gate arrays (FPGAs) have recently powered high-profile efficiency gains in systems from datacenters to embedded devices by offering ensembles of heterogeneous, reconfigurable hardware units. programming stacks for FPGAs, however, are stuck in the past-they are based on traditional hardware languages, which were appropriate when FPGAs were simple, homogeneous fabrics of basic programmable primitives. We describe Reticle, a new low-level abstraction for FPGA programming that, unlike existing languages, explicitly represents the special-purpose units available on a particular FPGA device. Reticle has two levels: a portable intermediate language and a target-specific assembly language. We show how to use a standard instruction selection approach to lower intermediate programs to assembly programs, which can be both faster and more effective than the complex metaheuristics that existing FPGA toolchains use. We use Reticle to implement linear algebra operators and coroutines and find that Reticle compilation runs up to 100 times faster than current approaches while producing comparable or better run-time and utilization.

关键词： compilers FPGAs

来源：评论

学校读者我要写书评

暂无评论

VESTA: Power Modeling with language Runtime Events

引用

PROCEEDINGS OF THE acm ON programming languageS-PacmPL 2024年第PLDI期8卷 621-646页

作者： Raskind, Joseph Babakol, Timur Mahmoud, Khaled Liu, Yu David SUNY Binghamton Binghamton NY 13902 USA

Power modeling is an essential building block for computer systems in support of energy optimization, energy profiling, and energy-aware application development. We introduce VESTA, a novel approach to modeling the power consumption of applications with one key insight: language runtime events are often correlated with a sustained level of power consumption. When compared with the established approach of power modeling based on hardware performance counters (HPCs), VESTA has the benefit of solely requiring application-scoped information and enabling a higher level of explainability, while achieving comparable or even higher precision. Through experiments performed on 37 real-world applications on the Java Virtual Machine (JVM), we find the power model built by VESTA is capable of predicting energy consumption with a mean absolute percentage error of 1.56%, while the monitoring of language runtime events incurs small performance and energy overhead.

关键词： power modeling language runtimes Java virtual machines BPF

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：