Toward Efficient Strong Memory Model Support for the Java Platform via Hybrid Synchronization
Aritra Sengupta, Man Cao, Michael D. Bond, Milind V. Kulkarni · 2015
The Java memory model provides strong behavior guarantees for data-race-free executions. However, it provides very weak guarantees for racy executions, leading to unexpected, unintuitive behaviors. This paper focuses on how to provide a memory model, called statically bounded region serializability (SBRS), that is substantially stronger than the Java memory model. Our prior work introduces SBRS, as well as compiler and runtime support for enforcing SBRS called EnfoRSer. EnfoRSer modifies the dynamic compiler to insert instrumentation to acquire a lock on each object accessed by the program. For most programs, EnfoRSer's primary run-time cost is executing this instrumentation at essentially every memory access.