avrora.sim.util
Class RangeProfiler

java.lang.Object
  avrora.sim.util.RangeProfiler

public class RangeProfiler

extends java.lang.Object

The RangeProfiler class implements a probe that can be used to profile a range of addresses in the program. It maintains a simple array of long that stores the count for each instruction in the specified range. It is more space efficient than the ProgramProfiler since it only stores the count for the range specified instead of for the entire program.

See Also:

Counter, ProgramProfiler

Field Summary

int	high_addr The high_addr stores the highest address in the range.
long[]	icount The itime field stores the invocation count for each instruction in the range.
int	low_addr The low_addr stores the lowest address in the range.
Program	program The program field stores a reference to the program being profiled.

Constructor Summary

RangeProfiler(Program p, int low, int high)
The constructor for the program profiler constructs the required internal state to store the invocation counts of each instruction.

Method Summary

void	fireAfter(Instr i, int address, State state) The fireAfter() method is called after the probed instruction executes.
void	fireBefore(Instr i, int address, State state) The fireBefore() method is called before the probed instruction executes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

program

public final Program program

The program field stores a reference to the program being profiled.

low_addr

public final int low_addr

The low_addr stores the lowest address in the range.

high_addr

public final int high_addr

The high_addr stores the highest address in the range.

icount

public final long[] icount

The itime field stores the invocation count for each instruction in the range. It is indexed by byte addresses, with expr 0 corresponding to the lowest address in the range (low_addr). at program.getInstr(addr).

Constructor Detail

RangeProfiler

public RangeProfiler(Program p,
                     int low,
                     int high)

The constructor for the program profiler constructs the required internal state to store the invocation counts of each instruction.

Parameters:

p - the program to profile

low - the low address in the range

high - the high address in the range

Method Detail

fireBefore

public void fireBefore(Instr i,
                       int address,
                       State state)

The fireBefore() method is called before the probed instruction executes. In the implementation of the range profiler, it simply increments the count of the instruction at the specified address if that address is in the given range.

Parameters:

i - the instruction being probed

address - the address at which this instruction resides

state - the state of the simulation

fireAfter

public void fireAfter(Instr i,
                      int address,
                      State state)

The fireAfter() method is called after the probed instruction executes. In the implementation of the range profiler, it does nothing.

Parameters:

i - the instruction being probed

address - the address at which this instruction resides

state - the state of the simulation