Improve interpreter handler table management.
We still have two handlers table:
- the "main" table which holds execution handlers of each instruction,
- the "alternative" table which holds handlers supporting instrumentation
before jumping to the corresponding instruction handler from the "main" table.
Instrumentation holds the index of the handler table the interpreter must use.
This index is represented by the InterpreterHandlerTable enum and is stored in
the Instrumentation::interpreter_handler_table_ field.
Interpreter's current handler table update happens:
- on backward branch
- after invoke
- when throwing exception.
In the case of the backward branch and exception, we only update the table if
any thread's flags is set. This allows to only do one test for handling thread
suspension and handler table update.
This CL also removes the local variable "instrumentation". Every handler which
needs it will get it from Runtime::Current()->GetInstrumentation().
Change-Id: Id886ea7ebf3dac1285f0ca701c098aee7ebaab8d
3 files changed