You've already forked UnrealEngineUWP
mirror of
https://github.com/izzy2lost/UnrealEngineUWP.git
synced 2026-03-26 18:15:20 -07:00
43d162234f
Previously any events traced while Trace allocates memory to trace events into were dropped because there was nowhere to write these events. This change splits memory allocation into two functions, one that will capture and send events when safe to do so, and one that doesn't capture events at all. For that latter, the capture is moved out to where allocating trace buffers happens so that captured events can be added to the buffer just allocated. This ensure order is maintained and that serials are ascending on a thread. Partial buffers; prior to this change, aux-data that was larger than available space in a buffer would be fragmented across multiple buffers. Buffers that started in the middle of aux-data were marked partial as there was no way for analysis to interpret the stream from this point. As it is now possible that allocation-traced events will be written into the buffer before it's made available, each fragment is preceded with a aux-data header. This makes the stream recoverable from any buffer and negates the need for having partial buffers at all. As aux-data can now be constructed of two or more aux-data events for a single field of an event, analysis needs to be aware of this and defragment these events. Late connect; analysis of a stream can now start with aux-data/terminal events with no corresponding owning event. This is fine; they get skipped over in DispatchEvents(). It is a deliberate choice to have a limited amount of redirected-buffer space to capture allocation-traced events. There needs to be enough space remaining in the new buffer to trace the outer event. Some platforms also have a limited amount of stack per thread. The Writer_AddPageToPool() in Writer_InitializePool() didn't do anything and was removed. GInitialized was set to early and subvert the reliance on static initialisation guarantees #rnx #jira UE-157559 #jira UE-161280 #preflight 632057f3bc40358fa290f403 [CL 21980603 by Martin Ridgers in ue5-main branch]