Dynamic Verification of C/C++11 Concurrency over Multi Copy Atomics

by   Sanjana Singh, et al.

We investigate the problem of runtime analysis of C11 programs under Multi-Copy-Atomic semantics (MCA). Under MCA, one can analyze program outcomes solely through interleaving and reordering of thread events. As a result, obtaining intuitive explanations of program outcomes becomes straightforward. Newer versions of ARM (ARMv8 and later), Alpha, and Intel's x-86 support MCA. Our tests reveal that state-of-the-art dynamic verification techniques that analyze program executions under the C11 memory model generate safety property violations that can be interpreted as false alarms under MCA semantics. Sorting the true from false violations puts an undesirable burden on the user. In this work, we provide a dynamic verification technique (MoCA) to analyze C11 program executions which are permitted under the MCA model. We design a happens-before relation and introduce coherence rules to capture precisely those C11 program executions which are allowed under the MCA model. MoCA's exploration of the state-space is based on the state-of-the-art dynamic verification algorithm, source-DPOR. Our experiments validate that MoCA captures all coherent C11 program executions, and is precise for the MCA model.



There are no comments yet.


page 1

page 2

page 3

page 4


Dynamic Verification with Observational Equivalence of C/C++ Concurrency

Program executions under relaxed memory model (rmm) semantics are signif...

Logical Characterization of Coherent Uninterpreted Programs

An uninterpreted program (UP) is a program whose semantics is defined ov...

Teaching Design by Contract using Snap!

With the progress in deductive program verification research, new tools ...

What's Decidable About Program Verification Modulo Axioms?

We consider the decidability of the verification problem of programs mod...

Robust Safety for Move

A program that maintains key safety properties even when interacting wit...

Different Maps for Different Uses. A Program Transformation for Intermediate Verification Languages

In theorem prover or SMT solver based verification, the program to be ve...

Deductive Verification via the Debug Adapter Protocol

We propose a conceptual integration of deductive program verification in...
This week in AI

Get the week's most popular data science and artificial intelligence research sent straight to your inbox every Saturday.