boehm-gc: revert all CACAO-specific modifications; this is now an exact copy of the...

[cacao.git] / src / mm / boehm-gc / obj_map.c

diff --git a/src/mm/boehm-gc/obj_map.c b/src/mm/boehm-gc/obj_map.c
index 81782b2cc764b6414b61320d21f529ebccced388..8198a7e5a6b7ef5a1d7bd8d21bbbe5b53f8a029a 100644 (file)
--- a/src/mm/boehm-gc/obj_map.c
+++ b/src/mm/boehm-gc/obj_map.c
@@ -18,132 +18,73 @@
  * and fast location of object start locations on machines (such as SPARC)
  * with slow division.
  */
-
-#include "config.h"
  
 # include "private/gc_priv.h"
 
-map_entry_type * GC_invalid_map = 0;
-
-/* Invalidate the object map associated with a block.  Free blocks     */
-/* are identified by invalid maps.                                     */
-void GC_invalidate_map(hhdr)
-hdr *hhdr;
-{
-    register int displ;
-    
-    if (GC_invalid_map == 0) {
-        GC_invalid_map = (map_entry_type *)GC_scratch_alloc(MAP_SIZE);
-        if (GC_invalid_map == 0) {
-            GC_err_printf0(
-               "Cant initialize GC_invalid_map: insufficient memory\n");
-            EXIT();
-        }
-        for (displ = 0; displ < HBLKSIZE; displ++) {
-            MAP_ENTRY(GC_invalid_map, displ) = OBJ_INVALID;
-        }
-    }
-    hhdr -> hb_map = GC_invalid_map;
-}
-
 /* Consider pointers that are offset bytes displaced from the beginning */
 /* of an object to be valid.                                            */
 
-# if defined(__STDC__) || defined(__cplusplus)
-    void GC_register_displacement(GC_word offset)
-# else
-    void GC_register_displacement(offset) 
-    GC_word offset;
-# endif
+GC_API void GC_CALL GC_register_displacement(size_t offset)
 {
     DCL_LOCK_STATE;
     
-    DISABLE_SIGNALS();
     LOCK();
     GC_register_displacement_inner(offset);
     UNLOCK();
-    ENABLE_SIGNALS();
 }
 
-void GC_register_displacement_inner(offset) 
-word offset;
+void GC_register_displacement_inner(size_t offset) 
 {
-    register unsigned i;
-    word map_entry = BYTES_TO_WORDS(offset);
-    
     if (offset >= VALID_OFFSET_SZ) {
         ABORT("Bad argument to GC_register_displacement");
     }
-    if (map_entry > MAX_OFFSET) map_entry = OFFSET_TOO_BIG;
     if (!GC_valid_offsets[offset]) {
       GC_valid_offsets[offset] = TRUE;
       GC_modws_valid_offsets[offset % sizeof(word)] = TRUE;
-      if (!GC_all_interior_pointers) {
-        for (i = 0; i <= MAXOBJSZ; i++) {
-          if (GC_obj_map[i] != 0) {
-             if (i == 0) {
-               GC_obj_map[i][offset] = (map_entry_type)map_entry;
-             } else {
-               register unsigned j;
-               register unsigned lb = WORDS_TO_BYTES(i);
-               
-               if (offset < lb) {
-                 for (j = offset; j < HBLKSIZE; j += lb) {
-                   GC_obj_map[i][j] = (map_entry_type)map_entry;
-                 }
-               }
-             }
-          }
-       }
-      }
     }
 }
 
-
-/* Add a heap block map for objects of size sz to obj_map.     */
-/* Return FALSE on failure.                                    */
-GC_bool GC_add_map_entry(sz)
-word sz;
+#ifdef MARK_BIT_PER_GRANULE
+/* Add a heap block map for objects of size granules to obj_map.       */
+/* Return FALSE on failure.                                            */
+/* A size of 0 granules is used for large objects.                     */
+GC_bool GC_add_map_entry(size_t granules)
 {
-    register unsigned obj_start;
-    register unsigned displ;
-    register map_entry_type * new_map;
-    word map_entry;
+    unsigned displ;
+    short * new_map;
     
-    if (sz > MAXOBJSZ) sz = 0;
-    if (GC_obj_map[sz] != 0) {
+    if (granules > BYTES_TO_GRANULES(MAXOBJBYTES)) granules = 0;
+    if (GC_obj_map[granules] != 0) {
         return(TRUE);
     }
-    new_map = (map_entry_type *)GC_scratch_alloc(MAP_SIZE);
+    new_map = (short *)GC_scratch_alloc(MAP_LEN * sizeof(short));
     if (new_map == 0) return(FALSE);
-#   ifdef PRINTSTATS
-        GC_printf1("Adding block map for size %lu\n", (unsigned long)sz);
-#   endif
-    for (displ = 0; displ < HBLKSIZE; displ++) {
-        MAP_ENTRY(new_map,displ) = OBJ_INVALID;
-    }
-    if (sz == 0) {
-        for(displ = 0; displ <= HBLKSIZE; displ++) {
-            if (OFFSET_VALID(displ)) {
-               map_entry = BYTES_TO_WORDS(displ);
-               if (map_entry > MAX_OFFSET) map_entry = OFFSET_TOO_BIG;
-                MAP_ENTRY(new_map,displ) = (map_entry_type)map_entry;
-            }
-        }
+    if (GC_print_stats)
+        GC_log_printf("Adding block map for size of %u granules (%u bytes)\n",
+                 (unsigned)granules, (unsigned)(GRANULES_TO_BYTES(granules)));
+    if (granules == 0) {
+      for (displ = 0; displ < BYTES_TO_GRANULES(HBLKSIZE); displ++) {
+        new_map[displ] = 1;  /* Nonzero to get us out of marker fast path. */
+      }
     } else {
-        for (obj_start = 0;
-             obj_start + WORDS_TO_BYTES(sz) <= HBLKSIZE;
-             obj_start += WORDS_TO_BYTES(sz)) {
-             for (displ = 0; displ < WORDS_TO_BYTES(sz); displ++) {
-                 if (OFFSET_VALID(displ)) {
-                    map_entry = BYTES_TO_WORDS(displ);
-                    if (map_entry > MAX_OFFSET) map_entry = OFFSET_TOO_BIG;
-                     MAP_ENTRY(new_map, obj_start + displ) =
-                                               (map_entry_type)map_entry;
-                 }
-             }
-        }
+      for (displ = 0; displ < BYTES_TO_GRANULES(HBLKSIZE); displ++) {
+       new_map[displ] = (short)(displ % granules);
+      }
     }
-    GC_obj_map[sz] = new_map;
+    GC_obj_map[granules] = new_map;
     return(TRUE);
 }
+#endif
+
+static GC_bool offsets_initialized = FALSE;
+
+void GC_initialize_offsets(void)
+{
+    if (!offsets_initialized) {
+      int i;
+      if (GC_all_interior_pointers) {
+       for (i = 0; i < VALID_OFFSET_SZ; ++i) GC_valid_offsets[i] = TRUE;
+      }
+      offsets_initialized = TRUE;
+    }
+}