in this paper, acceptance criteria of steel building code, comprehensive and quick evaluation procedures for x-bracing, are compared to each other parametrically and numerically. for this purpose, it is assumed first that the sample building is designed to meet steel building code and then by introducing transform parameters and using stress ratio of the designed components, acceptance of the d...

Proof-Carrying Code (PCC) enables a computer system to determine, automatically and with certainty, that program code provided by another system is safe to install and execute without requiring interpretation or run-time checking. PCC has applications in any computing system in which the safe, eecient, and dynamic installation of code is needed. The key idea of Proof-Carrying is to attach to th...

Rust is a modern systems language that provides guaranteed memory safety through static analysis. However, Rust includes an escape hatch in the form of “unsafe code,” which the compiler assumes to be memory safe and to preserve crucial pointer aliasing invariants. Unsafe code appears in many data structure implementations and other essential libraries, and bugs in this code can lead to memory s...

We present a language and a program analysis that certifies the safe use of flexible resource management idioms, in particular advance reservation or “block booking” of costly resources. This builds on previous work with resource managers that carry out runtime safety checks, by showing how to assist these with compile-time checks. We give a small ANF-style language with explicit resource manag...

Formal methods can in principle provide the highest levels of assurance of code safety by providing formal proofs as explicit evidence for the assurance claims. However, the proofs are often complex and difficult to relate to the code, in particular if it has been generated automatically. They may also be based on assumptions and reasoning principles that are not justified. This causes concerns...

Dynamic code generation is a technique that generates and executes fragments of executable code during the run-time of an program to reduce the execution time of programs. However, most of currently available dynamic code generation systems have weakness on high-level language support for describing dynamic code fragment. Especially, safety of dynamic composition of code fragments is not suffic...

ion-Carrying Code ? Elvira Albert, Puri Arenas, Germán Puebla, and Manuel Hermenegildo 1 Complutense University of Madrid, {elvira,puri}@sip.ucm.es 2 Technical University of Madrid, {german,herme}@fi.upm.es 3 University of New Mexico, [email protected] Abstract. Abstraction-Carrying Code (ACC) has recently been proposed as a framework for mobile code safety in which the code supplier provides a pro...

One of the major challenges in the design of modular and extensible operating systems is to guarantee safety in the presence of untrusted code. A similar problem arises in the domain of mobile code. One solution, adopted, for example, in the Java Virtual Machine [LY97], is to perform extensive safety checks at run time. In the alternative paradigm of proof-carrying code (PCC) proposed by Necula...

Virtual Machine authors face a difficult choice: to settle for low performance, cheap interpreter, or to write a specialized and costly compiler. One of the methods to bridge the gap between these two distant solutions is to use the existing code-copying technique that reuses chunks of VM’s binary code creating a simple JIT. While simple in principle this technique is not reliable without a com...