Refine comparisons to GC_greatest_plausible_heap_addr

GC_greatest_plausible_heap_addr should always be greater (strictly)
than any address of a heap object.

* backgraph.c (add_back_edges): Check that pointer is strictly less
than GC_greatest_plausible_heap_addr (instead of less or equal).
* dbg_mlc.c [KEEP_BACK_PTRS && ALIGNMENT==1] (GC_get_back_ptr_info):
Likewise.
* include/gc/gc_mark.h (GC_MARK_AND_PUSH): Likewise.
* malloc.c (GC_malloc_kind_global): Likewise.
* typd_mlc.c (GC_typed_mark_proc): Likewise.
* include/gc/gc_mark.h (GC_greatest_plausible_heap_addr): Refine
comment (that any object address is strictly less).
* mark.c (GC_mark_from): Allow descr in assertions to be equal to
GC_greatest_plausible_heap_addr-GC_least_plausible_heap_addr; reformat
comment.

1 files changed, 1 insertions, 1 deletions

diff --git a/typd_mlc.c b/typd_mlc.c
index 1a497972..108e328a 100644
--- a/typd_mlc.c
+++ b/typd_mlc.c
@@ -178,7 +178,7 @@ STATIC mse * GC_typed_mark_proc(word * addr, mse * mark_stack_ptr,
 
             LOAD_WORD_OR_CONTINUE(current, current_p);
             FIXUP_POINTER(current);
-            if (current >= (word)least_ha && current <= (word)greatest_ha) {
+            if (current >= (word)least_ha && current < (word)greatest_ha) {
                 PUSH_CONTENTS((ptr_t)current, mark_stack_ptr,
                               mark_stack_limit, current_p);
             }