0.8.12.6:

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

diff --git a/src/runtime/gc-internal.h b/src/runtime/gc-internal.h
index 28d0efc..ac8d5bd 100644 (file)
--- a/src/runtime/gc-internal.h
+++ b/src/runtime/gc-internal.h
@@ -60,6 +60,44 @@ lispobj  copy_unboxed_object(lispobj object, int nwords);
 lispobj  copy_large_object(lispobj object, int nwords);
 lispobj  copy_object(lispobj object, int nwords);
 
+lispobj *search_read_only_space(void *pointer);
+lispobj *search_static_space(void *pointer);
+lispobj *search_dynamic_space(void *pointer);
+
+/* Scan an area looking for an object which encloses the given pointer.
+ * Return the object start on success or NULL on failure. */
+static lispobj *
+search_space(lispobj *start, size_t words, lispobj *pointer)
+{
+    while (words > 0) {
+       size_t count = 1;
+       lispobj thing = *start;
+
+       /* If thing is an immediate then this is a cons. */
+       if (is_lisp_pointer(thing)
+           || ((thing & 3) == 0) /* fixnum */
+           || (widetag_of(thing) == BASE_CHAR_WIDETAG)
+           || (widetag_of(thing) == UNBOUND_MARKER_WIDETAG))
+           count = 2;
+       else
+           count = (sizetab[widetag_of(thing)])(start);
+
+       /* Check whether the pointer is within this object. */
+       if ((pointer >= start) && (pointer < (start+count))) {
+           /* found it! */
+           /*FSHOW((stderr,"/found %x in %x %x\n", pointer, start, thing));*/
+           return(start);
+       }
+
+       /* Round up the count. */
+       count = CEILING(count,2);
+
+       start += count;
+       words -= count;
+    }
+    return (NULL);
+}
+
 #ifdef LISP_FEATURE_GENCGC
 #include "gencgc-internal.h"
 #else