Polymorphic Endpoint Types for Copyless Message Passing

Polymorphic Types for Leak Detection in a Session-Oriented Functional Language

Copyless message passing is a communication paradigm in which only pointers are exchanged between sender and receiver processes. Because of its nature, this paradigm requires that messages are treated as linear resources. Yet, even linear type systems leave room for scenarios where apparently well-typed programs may leak memory. In this work we develop a polymorphic type system for leak-free co...

Typing Copyless Message Passing

We present a calculus that models a form of process interaction based on copyless message passing, in the style of Singularity OS. The calculus is equipped with a type system ensuring that well-typed processes are free from memory faults, memory leaks, and communication errors. The type system is essentially linear, but we show that linearity alone is inadequate, because it leaves room for scen...

Separation Logic - Expressiveness and Copyless Message-Passing

Heaps and Hops

This dissertation is about the specification and verification of copyless message-passing programs, a particular kind of concurrent programs that communicate by message passing. Instead of copying messages over channels, processes exchange pointers into a shared memory where the actual contents of messages are stored. Channels are themselves objects in the heap that can be communicated, thus ac...

Tracking Heaps That Hop with Heap-Hop

Heap-Hop is a program prover for concurrent heap-manipulating programs that use Hoare monitors and message-passing synchronization. Programs are annotated with pre and post-conditions and loop invariants, written in a fragment of separation logic. Communications are governed by a form of session types called contracts. Heap-Hop can prove safety and race-freedom and, thanks to contracts, absence...