org.jikesrvm.adaptive.recompilation.instrumentation
Class InsertMethodInvocationCounter

java.lang.Object
  org.jikesrvm.compilers.opt.driver.CompilerPhase
      org.jikesrvm.adaptive.recompilation.instrumentation.InsertMethodInvocationCounter

public class InsertMethodInvocationCounter
extends CompilerPhase

An CompilerPhase that inserts a method invocation counter on the first basic block of the method. It uses a InstrumentedEventCounterManager to obtain the space to put the counters.

Note: one counter data, (MethodInvocationCounterData) is shared across all methods, and is initialized at boot time. This is unlike other kinds of instrumentation (such as basic block counters) where a separate data object is maintained for each method.

InsertMethodInvocationCounter

public InsertMethodInvocationCounter()

newExecution

public CompilerPhase newExecution(IR ir)

Return this instance of this phase. This phase contains no per-compilation instance fields.

Overrides:

newExecution in class CompilerPhase

Parameters:

ir - not used

Returns:

this

shouldPerform

public final boolean shouldPerform(OptOptions options)

Description copied from class: CompilerPhase

This method determines if the phase should be run, based on the Options object it is passed. By default, phases are always performed. Subclasses should override this method if they only want to be performed conditionally.

Overrides:

shouldPerform in class CompilerPhase

Parameters:

options - the compiler options for the compilation

Returns:

true if the phase should be performed

getName

public final String getName()

Specified by:

getName in class CompilerPhase

Returns:

a String which is the name of the phase.

perform

public final void perform(IR ir)

Insert basic block counters

Specified by:

perform in class CompilerPhase

Parameters:

ir - the governing IR