private void StepDecoder()
{
ulong pos = m_ReadPos;
ulong maxpos = m_WritePos;
if (m_SeenStringRollback > 0)
{
m_SeenStrings.RemoveRange(m_SeenStrings.Count - m_SeenStringRollback, m_SeenStringRollback);
m_SeenStringRollback = 0;
}
if (m_SeenStackRollback > 0)
{
m_SeenStacks.RemoveRange(m_SeenStacks.Count - m_SeenStackRollback, m_SeenStackRollback);
m_SeenStackRollback = 0;
}
while (pos < maxpos)
{
if (!ReadUnsigned(out m_CurrCode, ref pos))
{
return;
}
if (!Enum.IsDefined(typeof(EventCode), (EventCode)m_CurrCode))
{
throw new IOException(String.Format("Bad event code {0} at pos {1}\n", m_CurrCode, pos - 1));
}
if (!ReadUnsigned(out m_CurrScope, ref pos))
{
return;
}
if (0 != m_CurrScope)
{
if (!ReadStringIndex(out m_CurrScopeDataIndex, ref pos))
{
return;
}
}
else
{
m_CurrScopeDataIndex = -1;
}
ulong timestamp;
if (!ReadUnsigned(out timestamp, ref pos))
{
return;
}
// Only commit after the whole thing read successfully, as the UI thread could sample the
// timestamp at any time to put in a trace marker.
m_CurrTimestamp = timestamp;
if (!ReadBackTraceIndex(out m_CurrBackTraceIndex, ref pos))
{
return;
}
switch ((EventCode)m_CurrCode)
{
case EventCode.BeginStream:
string pname;
ulong ptrsize;
ulong magic;
ulong timer_freq;
ulong well_known_address;
if (!ReadUnsigned(out magic, ref pos))
{
return;
}
if (magic != StreamMagic)
{
throw new IOException(String.Format("Bad stream magic {0:x8}, expected {1:x8}", magic, StreamMagic));
}
if (!ReadString(out pname, ref pos))
{
return;
}
if (!ReadUnsigned(out ptrsize, ref pos))
{
return;
}
if (!ReadUnsigned(out timer_freq, ref pos))
{
return;
}
if (!ReadUnsigned(out well_known_address, ref pos))
{
return;
}
MetaData.PlatformName = pname;
MetaData.PointerSizeBytes = (int)ptrsize;
MetaData.TimerFrequency = timer_freq;
MetaData.MemTraceInitCommonAddress = well_known_address;
// Nothing written.
break;
case EventCode.EndStream:
// Nothing written.
break;
case EventCode.ModuleDump:
{
List <ModuleInfo> tmp = new List <ModuleInfo>();
for (; ;)
{
ulong ctrl;
if (!ReadUnsigned(out ctrl, ref pos))
{
return;
}
if (0 == ctrl)
{
break;
}
string modname;
ulong modbase;
ulong modsize;
if (!ReadString(out modname, ref pos))
{
return;
}
if (!ReadUnsigned(out modbase, ref pos))
{
return;
}
if (!ReadUnsigned(out modsize, ref pos))
{
return;
}
if (modname.EndsWith(".exe", StringComparison.InvariantCultureIgnoreCase))
{
MetaData.ExecutableName = Path.GetFileNameWithoutExtension(modname);
}
tmp.Add(new ModuleInfo {
BaseAddress = modbase, SizeBytes = modsize, Name = modname
});
}
// We got all of it. Commit.
MetaData.Modules = tmp;
}
// Nothing written.
break;
case EventCode.Mark:
{
string name;
if (!ReadString(out name, ref pos))
{
return;
}
MetaData.AddMark(new TraceMark {
Name = name, TimeStamp = m_CurrTimestamp
});
}
// Nothing written.
break;
case EventCode.AddressAllocate:
{
ulong addr, size;
int name_index;
if (!ReadUnsigned(out addr, ref pos))
{
return;
}
if (!ReadUnsigned(out size, ref pos))
{
return;
}
if (!ReadStringIndex(out name_index, ref pos))
{
return;
}
if (!m_AddressCreateEvents.ContainsKey(addr))
{
m_AddressCreateEvents[addr] = m_Out.BaseStream.Position;
BeginOutEvent();
m_Out.Write(addr);
m_Out.Write(size);
m_Out.Write(name_index);
}
else
{
MetaData.AddWarning("Attempt to allocate already allocated virtual address {0:x16}", addr);
}
}
break;
case EventCode.AddressFree:
{
ulong addr;
if (!ReadUnsigned(out addr, ref pos))
{
return;
}
// Handle sloppy runtime code reporting frees multiple times :(
if (m_AddressCreateEvents.ContainsKey(addr))
{
BeginOutEvent();
m_Out.Write(addr);
m_Out.Write(m_AddressCreateEvents[addr]);
m_AddressCreateEvents.Remove(addr);
}
else
{
MetaData.AddWarning("Attempt to free non-allocated virtual address {0:x16}", addr);
}
}
break;
case EventCode.VirtualCommit:
case EventCode.VirtualDecommit:
{
ulong addr, size;
if (!ReadUnsigned(out addr, ref pos))
{
return;
}
if (!ReadUnsigned(out size, ref pos))
{
return;
}
BeginOutEvent();
m_Out.Write(addr);
m_Out.Write(size);
}
break;
case EventCode.HeapCreate:
{
ulong id;
int str_index;
if (!ReadUnsigned(out id, ref pos))
{
return;
}
if (!ReadStringIndex(out str_index, ref pos))
{
return;
}
m_HeapCreateEvents[id] = m_Out.BaseStream.Position;
BeginOutEvent();
m_Out.Write(id);
m_Out.Write(str_index);
}
break;
case EventCode.HeapDestroy:
{
ulong id;
if (!ReadUnsigned(out id, ref pos))
{
return;
}
if (m_HeapCreateEvents.ContainsKey(id))
{
BeginOutEvent();
m_Out.Write(id);
m_Out.Write(m_HeapCreateEvents[id]);
m_HeapCreateEvents.Remove(id);
}
else
{
MetaData.AddWarning("Attempt to destroy non-existing heap id={0:x16}", id);
}
}
break;
case EventCode.HeapAddCore:
case EventCode.HeapRemoveCore:
{
ulong id, addr, size;
if (!ReadUnsigned(out id, ref pos))
{
return;
}
if (!ReadUnsigned(out addr, ref pos))
{
return;
}
if (!ReadUnsigned(out size, ref pos))
{
return;
}
BeginOutEvent();
m_Out.Write(id);
m_Out.Write(addr);
m_Out.Write(size);
}
break;
case EventCode.HeapAllocate:
{
ulong addr, size, heap_id;
if (!ReadUnsigned(out heap_id, ref pos))
{
return;
}
if (!ReadUnsigned(out addr, ref pos))
{
return;
}
if (!ReadUnsigned(out size, ref pos))
{
return;
}
var key = new AllocationKey {
HeapId = heap_id, Address = addr
};
if (!m_AllocCreateEvents.ContainsKey(key))
{
m_AllocCreateEvents[key] = m_Out.BaseStream.Position;
BeginOutEvent();
m_Out.Write((uint)heap_id);
m_Out.Write(addr);
m_Out.Write(size);
}
else
{
MetaData.AddWarning("Attempt to allocate already-allocated address {0:x16} size {0:x16}", addr, size);
}
}
break;
case EventCode.HeapReallocate:
{
ulong heap_id, old_addr, new_addr, new_size;
if (!ReadUnsigned(out heap_id, ref pos))
{
return;
}
if (!ReadUnsigned(out old_addr, ref pos))
{
return;
}
if (!ReadUnsigned(out new_addr, ref pos))
{
return;
}
if (!ReadUnsigned(out new_size, ref pos))
{
return;
}
long npos = m_Out.BaseStream.Position;
var key = new AllocationKey {
HeapId = heap_id, Address = old_addr
};
if (m_AllocCreateEvents.ContainsKey(key))
{
BeginOutEvent();
m_Out.Write((uint)heap_id);
m_Out.Write(old_addr);
m_Out.Write(new_addr);
m_Out.Write(new_size);
m_Out.Write(m_AllocCreateEvents[key]);
m_AllocCreateEvents.Remove(key);
var new_key = new AllocationKey {
HeapId = heap_id, Address = new_addr
};
m_AllocCreateEvents[new_key] = npos;
}
else
{
MetaData.AddWarning("Attempt to reallocate non-allocated address {0:x16}", old_addr);
}
break;
}
case EventCode.HeapFree:
{
ulong addr, heap_id;
if (!ReadUnsigned(out heap_id, ref pos))
{
return;
}
if (!ReadUnsigned(out addr, ref pos))
{
return;
}
if (addr != 0)
{
var key = new AllocationKey {
HeapId = heap_id, Address = addr
};
if (m_AllocCreateEvents.ContainsKey(key))
{
BeginOutEvent();
m_Out.Write((uint)heap_id);
m_Out.Write(addr);
m_Out.Write(m_AllocCreateEvents[key]);
m_AllocCreateEvents.Remove(key);
}
else
{
MetaData.AddWarning("Attempt to free non-allocated address {0:x16}", addr);
}
}
}
break;
default:
throw new IOException(String.Format("Unexpected event code {0}", m_CurrCode));
}
// Commit data decoded so far
m_ReadPos = pos;
m_SeenStringRollback = 0;
m_SeenStackRollback = 0;
MetaData.MaxTimeStamp = m_CurrTimestamp;
++MetaData.EventCount;
}
}