#lockdown Nick.Penwarden
#rb none
==========================
MAJOR FEATURES + CHANGES
==========================
Change 3209340 on 2016/11/23 by Ben.Marsh
Convert UE4 codebase to an "include what you use" model - where every header just includes the dependencies it needs, rather than every source file including large monolithic headers like Engine.h and UnrealEd.h.
Measured full rebuild times around 2x faster using XGE on Windows, and improvements of 25% or more for incremental builds and full rebuilds on most other platforms.
* Every header now includes everything it needs to compile.
* There's a CoreMinimal.h header that gets you a set of ubiquitous types from Core (eg. FString, FName, TArray, FVector, etc...). Most headers now include this first.
* There's a CoreTypes.h header that sets up primitive UE4 types and build macros (int32, PLATFORM_WIN64, etc...). All headers in Core include this first, as does CoreMinimal.h.
* Every .cpp file includes its matching .h file first.
* This helps validate that each header is including everything it needs to compile.
* No engine code includes a monolithic header such as Engine.h or UnrealEd.h any more.
* You will get a warning if you try to include one of these from the engine. They still exist for compatibility with game projects and do not produce warnings when included there.
* There have only been minor changes to our internal games down to accommodate these changes. The intent is for this to be as seamless as possible.
* No engine code explicitly includes a precompiled header any more.
* We still use PCHs, but they're force-included on the compiler command line by UnrealBuildTool instead. This lets us tune what they contain without breaking any existing include dependencies.
* PCHs are generated by a tool to get a statistical amount of coverage for the source files using it, and I've seeded the new shared PCHs to contain any header included by > 15% of source files.
Tool used to generate this transform is at Engine\Source\Programs\IncludeTool.
[CL 3209342 by Ben Marsh in Main branch]
==========================
MAJOR FEATURES + CHANGES
==========================
Change 2836261 on 2016/01/20 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Flush FAsyncPackage cache after pre-load to reduce peak memory usage when async loading (5.5-10x).
Change 2828630 on 2016/01/14 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Adding debug code to catch memory stomps in the async loading buffers that's independent from mallocstomp allocator. Changed the signature of PageProtect functions to be able to read-only protect memory.
Change 2816129 on 2016/01/05 by Steve.Robb@Dev-Core
Fixes for Realloc and alignment logic which caused redundant reallocations and incorrect binning.
Change 2821054 on 2016/01/08 by Steve.Robb@Dev-Core
Further Realloc savings when realigning within a block.
Change 2806820 on 2015/12/17 by Steve.Robb@Dev-Core
New AlignDown function, like Align, but which rounds a value/pointer down to the next alignment instead of up.
Change 2806816 on 2015/12/17 by Steve.Robb@Dev-Core
Sort UHT modules by type to improve iteration times in conjunction with makefiles.
Change 2823235 on 2016/01/11 by Steve.Robb@Dev-Core
UHT error messages about missing GENERATED_BODY() macros updated to represent intended use.
Change 2806815 on 2015/12/17 by Steve.Robb@Dev-Core
Module types split into Game and Engine runtime versions.
Change 2833809 on 2016/01/19 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
StaticLoadObject will now respect LOAD_NoRedirects flag.
Change 2811194 on 2015/12/22 by Bob.Tellez@Z2434_DevCore
#UE4 Prevent loading packages that have a newer LegacyFileVersion since serialization for FCustomVersion is not forward compatible. UE-24443
Change 2806818 on 2015/12/17 by Steve.Robb@Dev-Core
Removal of stats from MallocBinned2, to be readded later.
Change 2807069 on 2015/12/17 by Steve.Robb@Dev-Core
Clarification of some bucket hashing terminology.
Change 2815117 on 2016/01/04 by Steve.Robb@Dev-Core
Fix for a missing root build path on game modules.
Change 2815673 on 2016/01/05 by Steve.Robb@Dev-Core
Move FMalloc verification into a proxy object.
Change 2822873 on 2016/01/11 by Steve.Robb@Dev-Core
Fixes to off-by-one errors and removal of BinnedSizeLimit (assumed to be the same as MAX_POOLED_ALLOCATION_SIZE after OBO fix).
Change 2822923 on 2016/01/11 by Steve.Robb@Dev-Core
Simplification of MemSizeToPoolTable indexing.
Change 2824974 on 2016/01/12 by Steve.Robb@Dev-Core
Assert fixed.
AllocateBlockFromPool's return value made debuggable.
Change 2825241 on 2016/01/12 by Steve.Robb@Dev-Core
UHT now returns an error code on a warning when -warningsaserrors is specified.
Change 2825291 on 2016/01/12 by Steve.Robb@Dev-Core
WarningsAsErrors enabled on UHT, after disabling the hardcoded behavior in CL# 2825241.
Change 2829846 on 2016/01/15 by Steve.Robb@Dev-Core
GitHub #1938 - wrong Max value of enum is used during net serialization
Change 2829914 on 2016/01/15 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Reduce the amount of memory allocated for async cache buffers when guarding against memory stomps.
Change 2829988 on 2016/01/15 by Steve.Robb@Dev-Core
Generalized large pool allocations.
More redundancy removed.
Change 2831935 on 2016/01/18 by Chris.Wood@Chris.Wood.StreamB
Added UserActivity property to crash description in CRP and CR website.
[OR-12043] - Phone Home where crashes occur - pass context info to Crash Reporter
DB column added to db-09 by ColinR matching this change.
Published to server on Jan 18th 2016
Change 2834003 on 2016/01/19 by Chris.Wood@Chris.Wood.StreamB
Added Linux to normal callstack parsing code on CR website
[UE-25527] - Linux CrashReporter is missing information
Published to server on Jan 19th 2016
Change 2835466 on 2016/01/20 by Joe.Conley@Joe.Conley_EGJWD5708_Dev-Core-Minimal
Fix issue for cancelling package loads when there are still packages queued. Call their PackageLoadedDelegate with a "Cancelled" result.
Should solve remaining issue with UE-24062 - "Calling CancelAsyncLoading triggers an assert in FAsyncPackage::DetachLinker()"
- (ULevelStreaming::AsyncLevelLoadComplete was not being called if packages were still queued when cancel was issued)
Change 2836803 on 2016/01/20 by Chris.Wood@Chris.Wood.StreamB
CrashReportWebsite - fix exception thrown when parsing certain callstack formats
Change 2837952 on 2016/01/21 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
Changing FAsyncIORequest to be stored as reference when cancelling IO requests to improve performance.
Change 2838289 on 2016/01/21 by Robert.Manuszewski@Robert.Manuszewski_NCL_Stream1
[CL 2845588 by Robert Manuszewski in Main branch]
