1.0.32.18: additional allocation information

[sbcl.git] / src / runtime / gencgc-internal.h

diff --git a/src/runtime/gencgc-internal.h b/src/runtime/gencgc-internal.h
index f828987..cdaa456 100644 (file)
--- a/src/runtime/gencgc-internal.h
+++ b/src/runtime/gencgc-internal.h
@@ -66,10 +66,14 @@ struct page {
          * OSes). This is useful for re-scavenging pages that are
          * written during a GC. */
         write_protected_cleared :1,
-        /* the region the page is allocated to: 0 for a free page; 1
-         * for boxed objects; 2 for unboxed objects. If the page is
-         * free the following slots are invalid (well the bytes_used
-         * must be 0). */
+        /*  000 free
+         *  10? boxed data
+         *  11? boxed code
+         *  01? unboxed data
+         *  ??1 open region
+         *
+         * If the page is free the following slots are invalid, except
+         * for the bytes_used which must be zero. */
         allocated :3,
         /* If this page should not be moved during a GC then this flag
          * is set. It's only valid during a GC for allocated pages. */
@@ -102,22 +106,25 @@ void sniff_code_object(struct code *code, unsigned long displacement);
 void gencgc_apply_code_fixups(struct code *old_code, struct code *new_code);
 
 long update_dynamic_space_free_pointer(void);
-void gc_alloc_update_page_tables(int unboxed,
-                                 struct alloc_region *alloc_region);
+void gc_alloc_update_page_tables(int page_type_flag, struct alloc_region *alloc_region);
 void gc_alloc_update_all_page_tables(void);
 void gc_set_region_empty(struct alloc_region *region);
 
 /*
  * predicates
  */
+
 static inline boolean
 space_matches_p(lispobj obj, generation_index_t space)
 {
-    page_index_t page_index=(void*)obj - (void *)DYNAMIC_SPACE_START;
-    return ((page_index >= 0)
-            && ((page_index =
-                 ((unsigned long)page_index)/PAGE_BYTES) < page_table_pages)
-            && (page_table[page_index].gen == space));
+    if (obj >= DYNAMIC_SPACE_START) {
+        page_index_t page_index=((pointer_sized_uint_t)obj
+                                 - DYNAMIC_SPACE_START) / PAGE_BYTES;
+        return ((page_index < page_table_pages) &&
+                (page_table[page_index].gen == space));
+    } else {
+        return 0;
+    }
 }
 
 static inline boolean