Improve multithreading of mmaps_generator (#25625)

* Build/Misc: Add a few *San CMake flags

Add the following flags for the related tools:
- MSAN for Memory Sanitizer
- UBSAN for Undefined Behavior Sanitizer
- TSAN for Thread Sanitizer

* Remove unused parameter

* Fix UBSan reported issue

* Disable G3D buffer pools when using Thread Sanitizer as it has its custom locking mechanisms

* Code cleanup

* Move threads from maps to tiles

* Move tile building logic to TileBuilder class

* Fix memory leak in TileBuilder

* Fix build

* Store TileBuilder as raw pointer for now, it will be changed later on to use modern C++ constructs

* Fix crash on shutdown

* Revert pvs-studio change

* Fix generating 1 single tile not closing the program

2 files changed, 68 insertions, 1 deletions

diff --git a/cmake/compiler/clang/settings.cmake b/cmake/compiler/clang/settings.cmake
index 2bd16a57579..896dd0ef157 100644
--- a/cmake/compiler/clang/settings.cmake
+++ b/cmake/compiler/clang/settings.cmake
@@ -74,7 +74,53 @@ if(ASAN)
       -fsanitize-recover=address
       -fsanitize-address-use-after-scope)
 
-  message(STATUS "Clang: Enabled Address Sanitizer")
+  message(STATUS "Clang: Enabled Address Sanitizer ASan")
+endif()
+
+if(MSAN)
+  target_compile_options(trinity-compile-option-interface
+    INTERFACE
+      -fno-omit-frame-pointer
+      -fsanitize=memory
+      -fsanitize-memory-track-origins
+      -mllvm
+      -msan-keep-going=1)
+
+  target_link_options(trinity-compile-option-interface
+    INTERFACE
+      -fno-omit-frame-pointer
+      -fsanitize=memory
+      -fsanitize-memory-track-origins)
+
+  message(STATUS "Clang: Enabled Memory Sanitizer MSan")
+endif()
+
+if(UBSAN)
+  target_compile_options(trinity-compile-option-interface
+    INTERFACE
+      -fno-omit-frame-pointer
+      -fsanitize=undefined)
+
+  target_link_options(trinity-compile-option-interface
+    INTERFACE
+      -fno-omit-frame-pointer
+      -fsanitize=undefined)
+
+  message(STATUS "Clang: Enabled Undefined Behavior Sanitizer UBSan")
+endif()
+
+if(TSAN)
+  target_compile_options(trinity-compile-option-interface
+    INTERFACE
+      -fno-omit-frame-pointer
+      -fsanitize=thread)
+
+  target_link_options(trinity-compile-option-interface
+    INTERFACE
+      -fno-omit-frame-pointer
+      -fsanitize=thread)
+
+  message(STATUS "Clang: Enabled Thread Sanitizer TSan")
 endif()
 
 # -Wno-narrowing needed to suppress a warning in g3d
diff --git a/cmake/showoptions.cmake b/cmake/showoptions.cmake
index f9bfa1f33fa..004e28e308e 100644
--- a/cmake/showoptions.cmake
+++ b/cmake/showoptions.cmake
@@ -122,6 +122,27 @@ if(ASAN)
   add_definitions(-DASAN)
 endif()
 
+if(MSAN)
+  message("")
+  message(" *** MSAN - WARNING!")
+  message(" *** Please note that this is for DEBUGGING WITH MEMORY SANITIZER only!")
+  add_definitions(-DMSAN)
+endif()
+
+if(UBSAN)
+  message("")
+  message(" *** UBSAN - WARNING!")
+  message(" *** Please note that this is for DEBUGGING WITH UNDEFINED BEHAVIOR SANITIZER only!")
+  add_definitions(-DUBSAN)
+endif()
+
+if(TSAN)
+  message("")
+  message(" *** TSAN - WARNING!")
+  message(" *** Please note that this is for DEBUGGING WITH THREAD SANITIZER only!")
+  add_definitions(-DTSAN -DNO_BUFFERPOOL)
+endif()
+
 if(PERFORMANCE_PROFILING)
   message("")
   message(" *** PERFORMANCE_PROFILING - WARNING!")