oss-fuzz: enable -fstrict-vtable-pointers

Author: LebedevRI

.ci/oss-fuzz.sh

@@ -25,7 +25,12 @@ RAWSPEED_BUILD="$WORK/rawspeed"
 
 ln -f -s /usr/local/bin/lld /usr/bin/ld
 
+CFLAGS="$CFLAGS -flto=thin"
+CXXFLAGS="$CXXFLAGS -flto=thin"
+
 CXXFLAGS="$CXXFLAGS -fforce-emit-vtables"
+# CXXFLAGS="$CXXFLAGS -fwhole-program-vtables" # DOES NOT WORK WITH SANCOV!
+CXXFLAGS="$CXXFLAGS -fstrict-vtable-pointers"
 
 THINLTO_CACHE="$WORK/thinlto-cache"
 LDFLAGS="${LDFLAGS:-} -Wl,--thinlto-cache-dir=\"$THINLTO_CACHE\""

cmake/compiler-flags.cmake

@@ -54,8 +54,8 @@ if(CMAKE_INTERPROCEDURAL_OPTIMIZATION)
   if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
     set(LIST )
     list(APPEND LIST -fforce-emit-vtables)
-    list(APPEND LIST -fno-whole-program-vtables)
-    list(APPEND LIST -fno-strict-vtable-pointers)
+    # list(APPEND LIST -fwhole-program-vtables) # DOES NOT WORK WITH SANCOV!
+    list(APPEND LIST -fstrict-vtable-pointers)
     add_compile_options("$<$<COMPILE_LANGUAGE:C,CXX>:${LIST}>")
   endif()
 endif()