Date: 28 Feb 2003

Building Certified Libraries for PCC: Dynamic Storage Allocation

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Abstract

Proof-Carrying Code (PCC) allows a code producer to provide to a host a program along with its formal safety proof. The proof attests a certain safety policy enforced by the code, and can be mechanically checked by the host. While this language-based approach to code certification is very general in principle, existing PCC systems have only focused on programs whose safety proofs can be automatically generated. As a result, many low-level system libraries (e.g., memory management) have not yet been handled. In this paper, we explore a complementary approach in which general properties and program correctness are semiautomatically certified. In particular, we introduce a low-level language CAP for building certified programs and present a certified library for dynamic storage allocation.

This research is based on work supported in part by DARPA OASIS grant F30602-99- 1-0519, NSF grant CCR-9901011, and NSF ITR grant CCR-0081590. Any opinions, findings, and conclusions contained in this document are those of the authors and do not reflect the views of these agencies.