Workaround TSan false positives in add_to_black_list_normal/stack

* blacklst.c (GC_add_to_black_list_normal, GC_add_to_black_list_stack):
Call set_pht_entry_from_index_concurrent() instead of
set_pht_entry_from_index().
* include/private/gc_priv.h [PARALLEL_MARK && THREAD_SANITIZER]
(set_pht_entry_from_index_concurrent): New macro (use AO_or).
* include/private/gc_priv.h [!PARALLEL_MARK || !THREAD_SANITIZER]
(set_pht_entry_from_index_concurrent): Define to
set_pht_entry_from_index.

1 files changed, 2 insertions, 2 deletions

diff --git a/blacklst.c b/blacklst.c
index c06fbdde..23d6a319 100644
--- a/blacklst.c
+++ b/blacklst.c
@@ -193,7 +193,7 @@ GC_INNER void GC_unpromote_black_lists(void)
           GC_print_blacklisted_ptr(p, source, "normal");
         }
 #     endif
-      set_pht_entry_from_index(GC_incomplete_normal_bl, index);
+      set_pht_entry_from_index_concurrent(GC_incomplete_normal_bl, index);
     } /* else this is probably just an interior pointer to an allocated */
       /* object, and isn't worth black listing.                         */
   }
@@ -214,7 +214,7 @@ GC_INNER void GC_unpromote_black_lists(void)
         GC_print_blacklisted_ptr(p, source, "stack");
       }
 #   endif
-    set_pht_entry_from_index(GC_incomplete_stack_bl, index);
+    set_pht_entry_from_index_concurrent(GC_incomplete_stack_bl, index);
   }
 }