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/* NSC -- new Scala compiler
* Copyright 2005-2011 LAMP/EPFL
* @author Paul Phillips
*/
package scala.tools
package util
/** This is a (very) minimal stub for profiling, the purpose
* of which is making it possible to integrate profiling hooks in
* the compiler without creating a dependency on any particular
* profiler. You can specify a profiler class (which must be an
* instance of this class) like so:
*
* // or -Yprofile:phase to profile individual phases
* scalac -Yprofile-class your.profiler.Class -Yprofile:all <files>
*
*/
abstract class Profiling {
def isActive: Boolean
def startProfiling(): Unit
def stopProfiling(): Unit
def captureSnapshot(): Unit
def allocationFreq: Option[Int] // record every Nth allocation
def startRecordingAllocations(): Unit
def stopRecordingAllocations(): Unit
def profile[T](body: => T): T = profileCPU(body)
def profileCPU[T](body: => T): T = {
startProfiling()
val result = body
stopProfiling()
captureSnapshot()
result
}
def profileMem[T](body: => T): T = {
startRecordingAllocations()
val result = body
stopRecordingAllocations()
result
}
/** Advance the current object generation.
*
* Each object on the heap is associated to a generation number. Generations
* start at 1, and are automatically advanced on each snapshot capture.
*/
def advanceGeneration(desc: String = ""): Unit
}
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