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JVMTI Profiler Hack Guide
Contents
Introduction
Martini Framework
Architecture
Martini Runtime is built on top of JVM. The JVM interface component is implemented as the interface between JVM and Martini Runtime by calling JVMTI/JVMPI. It’s responsible for data conversion and interface conversion and also provides rich functionality to inspect JVM state and control the execution of applications such as iterating heap. JVMTI event will be converted to internal event type and passed to Event Manger.
Event Manger component is responsible for dispatching event. Events can be sent from External components (EC, profilers) and internal components.
Martini Framework is instrumentation based profiling framework. It can record method enter/exit event, thread event and heap allocation event. Instead of generating event using JVMTI/JVMPI, Martini framework using bytecode instrumentation technology to generate execution, thread and heap event. Instrumentation Manger is responsible for managing the instrumentation process and it calls instrumentation adaptors to instrument bytecode with specific functionality.