From: Ivan Maidanski <ivmai@mail.ru>
Date: Wed, 16 Aug 2017 22:39:16 +0000 (+0300)
Subject: Fix visibility of __asan_default_options in case of shared library
X-Git-Tag: v7.6.2~92
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6a89654d67bfb1f43d4f6ceb19ce9720bc2d96f6;p=gc

Fix visibility of __asan_default_options in case of shared library
(fix commit ce75cf1)

* os_dep.c [ADDRESS_SANITIZER && (UNIX_LIKE || NEED_FIND_LIMIT
|| MPROTECT_VDB)] (__asan_default_options): Do not define if
CUSTOM_ASAN_DEF_OPTIONS is defined; export it (use GC_API).
---

diff --git a/os_dep.c b/os_dep.c
index 03ba6bf8..cce2e6b0 100644
--- a/os_dep.c
+++ b/os_dep.c
@@ -507,9 +507,11 @@ GC_INNER char * GC_get_maps(void)
 #endif /* NETBSD */
 
 #if defined(ADDRESS_SANITIZER) && (defined(UNIX_LIKE) \
-                    || defined(NEED_FIND_LIMIT) || defined(MPROTECT_VDB))
+                    || defined(NEED_FIND_LIMIT) || defined(MPROTECT_VDB)) \
+    && !defined(CUSTOM_ASAN_DEF_OPTIONS)
   /* To tell ASan to allow GC to use its own SIGBUS/SEGV handlers.      */
-  const char *__asan_default_options(void)
+  /* The function is exported just to be visible to ASan library.       */
+  GC_API const char *__asan_default_options(void)
   {
     return "allow_user_segv_handler=1";
   }