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package com.oracle.truffle.tools.warmup.impl;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.locks.Lock;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.frame.FrameSlot;
import com.oracle.truffle.api.frame.FrameSlotKind;
import com.oracle.truffle.api.frame.FrameUtil;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.instrumentation.ExecutionEventNode;
class WarmupEstimatorNode extends ExecutionEventNode {
private final List<Long> times;
@CompilerDirectives.CompilationFinal private volatile FrameSlot startSlot;
WarmupEstimatorNode(List<Long> times) {
this.times = times;
}
@Override
protected void onEnter(VirtualFrame frame) {
if (this.startSlot == null) {
CompilerDirectives.transferToInterpreterAndInvalidate();
Lock lock = getLock();
lock.lock();
try {
startSlot = frame.getFrameDescriptor().findOrAddFrameSlot(this, FrameSlotKind.Long);
} finally {
lock.unlock();
}
}
frame.setLong(startSlot, System.nanoTime());
}
@Override
protected void onReturnValue(VirtualFrame frame, Object result) {
if (startSlot != null) {
final long end = System.nanoTime();
record(end - FrameUtil.getLongSafe(frame, startSlot));
}
}
@CompilerDirectives.TruffleBoundary
private synchronized void record(long duration) {
times.add(duration);
}
synchronized List<Long> getTimes() {
return Collections.unmodifiableList(times);
}
}