[clang] Add linker flag "wholearchive" for asan_cxx.

[mpividori]

Summary

We need -wholearchive for asan_cxx, the same than for asan.
Clang Driver will add asan_cxx at the beginning of the arg list that we pass to the linker.
To ensure that all the static libraries are linked to asan_cxx, we force the linker to include the object files in asan_cxx.

This fixes some linker errors when compiling with address sanitizer for MT and passing the static library libFuzzer.

[rnk]

Looks good with suggested changes

lib/Driver/Tools.cpp

11010 ↗

(On Diff #87773)

Make these part of the for loop above.

cfe/trunk/lib/Driver/Tools.cpp

if (TC.getSanitizerArgs().needsSharedAsanRt() ||
               : "-include:__asan_seh_interceptor"));
       // Make sure the linker consider all object files from the dynamic runtime
       // thunk.
       CmdArgs.push_back(Args.MakeArgString(std::string("-wholearchive:") +
           TC.getCompilerRT(Args, "asan_dynamic_runtime_thunk")));
     } else if (DLL) {
       CmdArgs.push_back(TC.getCompilerRTArgString(Args, "asan_dll_thunk"));
     } else {
-      for (const auto &Lib : {"asan", "asan_cxx"})
+      for (const auto &Lib : {"asan", "asan_cxx"}) {
         CmdArgs.push_back(TC.getCompilerRTArgString(Args, Lib));
-      // Make sure the linker consider all object files from the static library.
+        // Make sure the linker consider all object files from the static lib.
         // This is necessary because instrumented dlls need access to all the
         // interface exported by the static lib in the main executable.
         CmdArgs.push_back(Args.MakeArgString(std::string("-wholearchive:") +
-          TC.getCompilerRT(Args, "asan")));
+            TC.getCompilerRT(Args, Lib)));
+      }
     }
   }
 
   Args.AddAllArgValues(CmdArgs, options::OPT__SLASH_link);
 
   if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
                    options::OPT_fno_openmp, false)) {
     CmdArgs.push_back("-nodefaultlib:vcomp.lib");