New API function to clear GC exclusion table

(part of commit 8b95edbd6 from Unity-Technologies/bdwgc)

* include/gc.h (GC_clear_exclusion_table): Declare new API function.
* mark_rts.c (GC_clear_exclusion_table): Implement.
* tests/test.c [!PCR && !GC_WIN32_THREADS && !GC_PTHREADS] (main): Call
GC_clear_exclusion_table.

1 files changed, 5 insertions, 0 deletions

diff --git a/mark_rts.c b/mark_rts.c
index a3fd4181..edc806a0 100644
--- a/mark_rts.c
+++ b/mark_rts.c
@@ -534,6 +534,11 @@ struct exclusion GC_excl_table[MAX_EXCLUSIONS];
 
 STATIC size_t GC_excl_table_entries = 0;/* Number of entries in use.      */
 
+GC_API void GC_CALL GC_clear_exclusion_table(void)
+{
+    GC_excl_table_entries = 0;
+}
+
 /* Return the first exclusion range that includes an address >= start_addr */
 /* Assumes the exclusion table contains at least one entry (namely the     */
 /* GC data structures).                                                    */