Replace embedded libgc with Unity fork of recent Boehm (bdwgc) (#16832)

* Initial commit to migrate libgc to bdwgc.

* Fix submodule url

* Don't force Boehm as runtime wrapper. Was just for testing locally.

* Build bdwgc as single object file. Helps with performance.

* Bump bdwgc submodule.

* Attempt to fix windows MSVC based build.

* Remove any references to GC_INSIDE_DLL as we manually managed threads on Windows.

* Allow building boehm on Windows amd64.

* Allow building boehm with msvc.

* Bump bdwgc to fix line endings

* Use LF for sh, am, m4, and ac files in bdwgc

* Bump bdwgc & libatomic_ops with fix for cygwin

* Bump bdwgc to fix mono-boehm being generated as libtool wrapper script.

* Link the static boehm library.

* Revert "Link the static boehm library."

This reverts commit 1f90d81d08308a61c890743cd79d8f6bb791bc99.

* Use --export-all-symbols on cygwin/mingw to fix issues with boehm causing mono symbols not to be exported.

* Fix

1 files changed, 4 insertions, 133 deletions

diff --git a/msvc/libgc.targets b/msvc/libgc.targets
index 2dfb0bbb30f..4f997363ce8 100644
--- a/msvc/libgc.targets
+++ b/msvc/libgc.targets
@@ -3,148 +3,19 @@
   <PropertyGroup>
     <ExcludeFromWindowsBuild>true</ExcludeFromWindowsBuild>
     <ExcludeBoehmGCFromBuild>true</ExcludeBoehmGCFromBuild>
-    <ExcludeBoehmGCFromBuild Condition="'$(MONO_TARGET_GC)'=='boehm' And '$(Platform)'=='Win32'">false</ExcludeBoehmGCFromBuild>
+    <ExcludeBoehmGCFromBuild Condition="'$(MONO_TARGET_GC)'=='boehm'">false</ExcludeBoehmGCFromBuild>
   </PropertyGroup>
   <ItemGroup Label="libmonogc_la_sources">
-    <ClCompile Include="$(MonoSourceLocation)\libgc\allchblk.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\alloc.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\blacklst.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\checksums.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\dbg_mlc.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\dyn_load.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\finalize.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\gc_dlopen.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\gcj_mlc.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\headers.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\malloc.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\mallocx.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\mark.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\mark_rts.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\misc.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\new_hblk.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\obj_map.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\os_dep.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\pcr_interface.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\ptr_chck.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\real_malloc.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\reclaim.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\solaris_pthreads.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\solaris_threads.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\specific.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\stubborn.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\typd_mlc.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\backgraph.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\win32_threads.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\pthread_support.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\pthread_stop_world.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\darwin_stop_world.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\openbsd_stop_world.c">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-      <ExcludedFromBuild>$(ExcludeFromWindowsBuild)</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="$(MonoSourceLocation)\libgc\mach_dep.c">
+    <ClCompile Include="$(MonoSourceLocation)\external\bdwgc\extra\gc.c">
       <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
-    <ClInclude Include="$(MonoSourceLocation)\libgc\include\private\gcconfig.h">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClInclude>
-    <ClInclude Include="$(MonoSourceLocation)\libgc\include\private\gc_priv.h">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClInclude>
-    <ClInclude Include="$(MonoSourceLocation)\libgc\include\private\gc_hdrs.h">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClInclude>
-    <ClInclude Include="$(MonoSourceLocation)\libgc\include\gc.h">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClInclude>
-    <ClInclude Include="$(MonoSourceLocation)\libgc\include\gc_gcj.h">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClInclude>
-    <ClInclude Include="$(MonoSourceLocation)\libgc\include\gc_mark.h">
-      <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
-    </ClInclude>
-    <ClInclude Include="$(MonoSourceLocation)\libgc\include\private\gc_locks.h">
+    <ClInclude Include="$(MonoSourceLocation)\external\bdwgc\include\gc.h">
       <ExcludedFromBuild>$(ExcludeBoehmGCFromBuild)</ExcludedFromBuild>
     </ClInclude>
   </ItemGroup>
   <ItemGroup>
-    <None Include="$(MonoSourceLocation)\libgc\Makefile.am" />
+    <None Include="$(MonoSourceLocation)\external\bdwgc\Makefile.am" />
   </ItemGroup>
 </Project>
\ No newline at end of file