Enable control flow guard for mono on windows

src/mono/CMakeLists.txt

@@ -272,12 +272,14 @@ elseif(CLR_CMAKE_HOST_OS STREQUAL "windows")
   set(MONO_ZERO_LEN_ARRAY 1)
   set(INTERNAL_ZLIB 1)
   set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>") # statically link VC runtime library
-  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/W4>)     # set warning level 4
-  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/WX>)     # treat warnings as errors
-  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/wd4324>) # 'struct_name' : structure was padded due to __declspec(align())
-  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/EHsc>)   # set exception handling behavior
-  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/FC>)     # use full pathnames in diagnostics
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/W4>)      # set warning level 4
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/WX>)      # treat warnings as errors
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/wd4324>)  # 'struct_name' : structure was padded due to __declspec(align())
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/EHsc>)    # set exception handling behavior
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/FC>)      # use full pathnames in diagnostics
+  add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/GUARD:cf) # Enable control flow guard
   add_link_options(/STACK:0x800000)  # set stack size to 8MB (default is 1MB)
+  add_link_options(/GUARD:cf)
   if(CMAKE_BUILD_TYPE STREQUAL "Release")
     add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/Oi>) # enable intrinsics
     add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/GF>) # enable string pooling