public GCSimulation(ClrProfilerParser profiler)
{
m_clrProfiler = profiler;
m_relocs = new GrowableArray <Relocation>(256);
Allocs = new GrowableArray <AllocInfo>(100000);
m_clrProfiler.GCStart += new ClrProfilerParser.GCEventHandler(this.GCStart);
m_clrProfiler.GCEnd += new ClrProfilerParser.GCEventHandler(this.GCEnd);
m_clrProfiler.ObjectRangeLive += new ClrProfilerParser.LiveObjectRangeHandler(this.ObjectRangeLive);
m_clrProfiler.ObjectRangeRelocation += new ClrProfilerParser.RelocationEventHandler(this.ObjectRangeRelocation);
// TODO expose the thread information
AllocInfo info = new AllocInfo();
m_clrProfiler.Allocation += delegate(ProfilerAllocID allocId, Address objectAddress, uint threadId)
{
Debug.Assert(allocId != ProfilerAllocID.Null);
info.Size = (int)m_clrProfiler.GetAllocSize(allocId);
info.AllocId = allocId;
var stackId = m_clrProfiler.GetAllocStack(allocId);
info.MsecFromStart = CurrentTimeMSec;
info.ObjectAddress = objectAddress;
Allocs.Add(info);
m_numAllocs++;
};
m_clrProfiler.Tick += delegate(int milliSecondsSinceStart)
{
CurrentTimeMSec = milliSecondsSinceStart;
};
}
// Returns true if 'alloc' survivies.
private bool ApplyRelocsToAlloc(ref AllocInfo alloc)
{
// You survive if your generation is large than the condemed generation.
if (alloc.Generation > m_condemedGeneration)
{
return(true);
}
Debug.Assert(m_areRelocsSorted);
// See if you survived.
int idx = m_lastRelocIdx; // See if you can start where you left off.
if (alloc.ObjectAddress < m_lastRelocRegionEnd)
{
idx = 0; // Nope, start at the begining.
}
while (idx < m_relocs.Count)
{
if (alloc.ObjectAddress < m_relocs[idx].SourceStart)
{
return(false);
}
if (alloc.ObjectAddress < m_relocs[idx].SourceEnd)
{
alloc.ObjectAddress = alloc.ObjectAddress + m_relocs[idx].DiffToTarget;
alloc.Generation = m_promotedToGeneration;
return(true);
}
m_lastRelocRegionEnd = m_relocs[idx].SourceEnd;
idx++;
m_lastRelocIdx = idx;
}
// TODO FIX NOW, not right when we have segments everywhere..
// OK it did not survive the condemed generation, see if it is in a segment that was not condemed
if (m_condemedGeneration < 2)
{
foreach (var gcSegment in m_gcSegments)
{
if (gcSegment.rangeStart <= alloc.ObjectAddress &&
alloc.ObjectAddress < gcSegment.rangeStart + (ulong)gcSegment.rangeLength)
{
// Note rangeGeneration can == 3 for Large object heap, but this still works because we only even look
// for generations less than 2.
return(gcSegment.rangeGeneration > m_condemedGeneration);
}
}
Debug.Assert(false, "Object in no heap segment!");
}
return(false);
}
