Architecture
The Dynamic Runtime Layer virtual machine consists of the following components:
- The VM core: with its subcomponents concentrates most of the JVM control functions.
- The porting layer: hides platform-specific details from other VM components behind a single interface and is based on the Apache Portable Runtime layer.
- The garbage collector: allocates Java objects in the heap memory and reclaims unreachable objects using various algorithms
- Execution Manager: selects the execution engine for compiling a method, handles profiles and the dynamic recompilation logic.
- Class Library: is a Java standard library.
- The thread manager that handle operating system threading
- The execution engine: consists of the following:
- The just-in-time compiler for compilation and execution of method code.
- The interpreter for easier debugging.
Read more about this topic: Apache Harmony, Last Development Status
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