From: Ivan Maidanski <ivmai@mail.ru>
Date: Tue, 19 Sep 2017 07:51:24 +0000 (+0300)
Subject: Fix infinite mark_some calls after memory mapping disappeared (Glibc)
X-Git-Tag: v7.4.6~15
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=84b845c7ba95c1f8abeb907c20527bed1da7b9bc;p=gc

Fix infinite mark_some calls after memory mapping disappeared (Glibc)

Issue #179 (bdwgc).

* mark.c [WRAP_MARK_SOME && REGISTER_LIBRARIES_EARLY] (GC_mark_some):
Call GC_cond_register_dynamic_libraries (with the world running)
before GC_invalidate_mark_state().
---

diff --git a/mark.c b/mark.c
index 477928e2..ef78f281 100644
--- a/mark.c
+++ b/mark.c
@@ -565,6 +565,11 @@ handle_ex:
 
       /* We have bad roots on the stack.  Discard mark stack.   */
       /* Rescan from marked objects.  Redetermine roots.        */
+#     ifdef REGISTER_LIBRARIES_EARLY
+        START_WORLD();
+        GC_cond_register_dynamic_libraries();
+        STOP_WORLD();
+#     endif
       GC_invalidate_mark_state();
       scan_ptr = 0;