/// <summary>
/// Saves the local stack traces (saved by calls to <see cref="TryAddStackTraceForDesyncLog"/>) around the area
/// where a desync occurred to disk, and sends a packet to the arbiter (via the host) to make it do the same
/// </summary>
/// <param name="local">The local client's opinion, to dump the stacks from</param>
/// <param name="remote">A remote client's opinion, used to find where the desync occurred</param>
private void SaveStackTracesToDisk(ClientSyncOpinion local, ClientSyncOpinion remote)
{
Log.Message($"Saving {local.desyncStackTraces.Count} traces to disk");
//Find the length of whichever stack trace is shorter.
int diffAt = -1;
int count = Math.Min(local.desyncStackTraceHashes.Count, remote.desyncStackTraceHashes.Count);
//Find the point at which the hashes differ - this is where the desync occurred.
for (int i = 0; i < count; i++)
{
if (local.desyncStackTraceHashes[i] != remote.desyncStackTraceHashes[i])
{
diffAt = i;
break;
}
}
if (diffAt == -1)
{
diffAt = count;
}
//Dump the stack traces to disk
File.WriteAllText("local_traces.txt", local.GetFormattedStackTracesForRange(diffAt - 40, diffAt + 40));
//Trigger a call to ClientConnection#HandleDebug on the arbiter instance so that arbiter_traces.txt is saved too
Multiplayer.Client.Send(Packets.Client_Debug, local.startTick, diffAt - 40, diffAt + 40);
}
/// <summary>
/// Get a nicely formatted string containing local stack traces (saved by calls to <see cref="TryAddStackTraceForDesyncLog"/>)
/// around the area where a desync occurred
/// </summary>
/// <param name="dumpFrom">The client's opinion to dump the stacks from</param>
/// <param name="compareTo">Another client's opinion, used to find where the desync occurred</param>
/// <returns></returns>
private string GetDesyncStackTraces(ClientSyncOpinion dumpFrom, ClientSyncOpinion compareTo, out int diffAt)
{
//Find the length of whichever stack trace is shorter.
diffAt = -1;
int count = Math.Min(dumpFrom.desyncStackTraceHashes.Count, compareTo.desyncStackTraceHashes.Count);
//Find the point at which the hashes differ - this is where the desync occurred.
for (int i = 0; i < count; i++)
{
if (dumpFrom.desyncStackTraceHashes[i] != compareTo.desyncStackTraceHashes[i])
{
diffAt = i;
break;
}
}
if (diffAt == -1)
{
diffAt = count;
}
return(dumpFrom.GetFormattedStackTracesForRange(diffAt - 40, diffAt + 40, diffAt));
}