Blogs (28) >>
ECOOP 2016
Sun 17 - Fri 22 July 2016 Rome, Italy

Modern software systems are not built from scratch. They use functionality provided by libraries. These libraries evolve and often upgrades are deployed without the systems being recompiled. In Java, this process is particularly error-prone due to the mismatch between source and binary compatibility, and the lack of API stability in many popular libraries. We propose a novel approach to mitigate this problem based on the use of \texttt{invokedynamic} instructions for cross-component method invocations. The dispatch mechanism of \texttt{invokedynamic} is used to provide on-the-fly signature adaptation. We show how this idea can be used to construct a Java compiler that produces more resilient bytecode. We present the dynamo compiler, a proof-of-concept implemented as \texttt{javac} post compiler, and evaluate our approach using several benchmark examples and two case studies showing how the use of the dynamo compiler can prevent certain types of linkage and stack overflow errors that have been observed in real-world systems.