support theap for T_OBJECT.

* variable.c: now instance variable space has theap supports.
  obj_ivar_heap_alloc() tries to acquire memory from theap.

* debug_counter.h: add some counters for theap.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65446 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

debug_counter.h

@@ -141,6 +141,7 @@ RB_DEBUG_COUNTER(gc_major_oldmalloc)
  * * [attr]
  *   * _ptr: R?? is not embed.
  *   * _embed: R?? is embed.
+ *   * _transient: R?? uses transient heap.
  * * type specific attr.
  *   * str_shared: str is shared.
  *   * str_nofree:        nofree
@@ -162,8 +163,9 @@ RB_DEBUG_COUNTER(obj_free)
 RB_DEBUG_COUNTER(obj_promote)
 RB_DEBUG_COUNTER(obj_wb_unprotect)
 
-RB_DEBUG_COUNTER(obj_obj_ptr)
 RB_DEBUG_COUNTER(obj_obj_embed)
+RB_DEBUG_COUNTER(obj_obj_transient)
+RB_DEBUG_COUNTER(obj_obj_ptr)
 
 RB_DEBUG_COUNTER(obj_str_ptr)
 RB_DEBUG_COUNTER(obj_str_embed)
@@ -171,8 +173,9 @@ RB_DEBUG_COUNTER(obj_str_shared)
 RB_DEBUG_COUNTER(obj_str_nofree)
 RB_DEBUG_COUNTER(obj_str_fstr)
 
-RB_DEBUG_COUNTER(obj_ary_ptr)
 RB_DEBUG_COUNTER(obj_ary_embed)
+RB_DEBUG_COUNTER(obj_ary_transient)
+RB_DEBUG_COUNTER(obj_ary_ptr)
 
 RB_DEBUG_COUNTER(obj_hash_empty)
 RB_DEBUG_COUNTER(obj_hash_under4)

gc.c

@@ -2215,13 +2215,16 @@ obj_free(rb_objspace_t *objspace, VALUE obj)
 
     switch (BUILTIN_TYPE(obj)) {
       case T_OBJECT:
-	if (!(RANY(obj)->as.basic.flags & ROBJECT_EMBED) &&
+        if ((RANY(obj)->as.basic.flags & ROBJECT_EMBED) ||
-            RANY(obj)->as.object.as.heap.ivptr) {
+            RANY(obj)->as.object.as.heap.ivptr == NULL) {
-	    xfree(RANY(obj)->as.object.as.heap.ivptr);
+            RB_DEBUG_COUNTER_INC(obj_obj_embed);
-	    RB_DEBUG_COUNTER_INC(obj_obj_ptr);
+        }
+        else if (ROBJ_TRANSIENT_P(obj)) {
+            RB_DEBUG_COUNTER_INC(obj_obj_transient);
         }
         else {
-            RB_DEBUG_COUNTER_INC(obj_obj_embed);
+	    xfree(RANY(obj)->as.object.as.heap.ivptr);
+            RB_DEBUG_COUNTER_INC(obj_obj_ptr);
         }
 	break;
       case T_MODULE:
@@ -4717,10 +4720,18 @@ gc_mark_children(rb_objspace_t *objspace, VALUE obj)
 
       case T_OBJECT:
         {
+            const VALUE * const ptr = ROBJECT_IVPTR(obj);
+
+            if (ptr) {
                 uint32_t i, len = ROBJECT_NUMIV(obj);
-	    VALUE *ptr = ROBJECT_IVPTR(obj);
                 for (i  = 0; i < len; i++) {
-		gc_mark(objspace, *ptr++);
+                    gc_mark(objspace, ptr[i]);
+                }
+
+                if (objspace->mark_func_data == NULL &&
+                    ROBJ_TRANSIENT_P(obj)) {
+                    rb_transient_heap_mark(obj, ptr);
+                }
             }
         }
 	break;
@@ -9645,6 +9656,19 @@ rb_raw_obj_info(char *buff, const int buff_size, VALUE obj)
 	    }
 	    break;
 	  }
+          case T_OBJECT:
+            {
+                uint32_t len = ROBJECT_NUMIV(obj);
+
+                if (RANY(obj)->as.basic.flags & ROBJECT_EMBED) {
+                    snprintf(buff, buff_size, "%s (embed) len:%d", buff, len);
+                }
+                else {
+                    VALUE *ptr = ROBJECT_IVPTR(obj);
+                    snprintf(buff, buff_size, "%s len:%d ptr:%p", buff, len, ptr);
+                }
+            }
+            break;
 	  case T_DATA: {
 	    const struct rb_block *block;
 	    const rb_iseq_t *iseq;

internal.h

@@ -1922,6 +1922,9 @@ extern rb_encoding OnigEncodingUTF_8;
 #endif
 
 /* variable.c */
+#define ROBJECT_TRANSIENT_FLAG FL_USER13
+#define ROBJ_TRANSIENT_P(obj) FL_TEST_RAW((obj), ROBJECT_TRANSIENT_FLAG)
+
 void rb_gc_mark_global_tbl(void);
 size_t rb_generic_ivar_memsize(VALUE);
 VALUE rb_search_class_path(VALUE);

variable.c

@@ -22,6 +22,7 @@
 #include "id_table.h"
 #include "debug_counter.h"
 #include "vm_core.h"
+#include "transient_heap.h"
 
 static struct rb_id_table *rb_global_tbl;
 static ID autoload, classpath, tmp_classpath, classid;
@@ -1333,18 +1334,75 @@ generic_ivar_set(VALUE obj, ID id, VALUE val)
     RB_OBJ_WRITTEN(obj, Qundef, val);
 }
 
-VALUE
+static VALUE *
-rb_ivar_set(VALUE obj, ID id, VALUE val)
+obj_ivar_heap_alloc(VALUE obj, size_t newsize)
+{
+    VALUE *newptr = rb_transient_heap_alloc(obj, sizeof(VALUE) * newsize);
+
+    if (newptr != NULL) {
+        FL_SET_RAW(obj, ROBJECT_TRANSIENT_FLAG);
+    }
+    else {
+        FL_UNSET_RAW(obj, ROBJECT_TRANSIENT_FLAG);
+        newptr = ALLOC_N(VALUE, newsize);
+    }
+    return newptr;
+}
+
+static VALUE *
+obj_ivar_heap_realloc(VALUE obj, int32_t len, size_t newsize)
+{
+    VALUE *newptr;
+    int i;
+
+    if (ROBJ_TRANSIENT_P(obj)) {
+        const VALUE *orig_ptr = ROBJECT(obj)->as.heap.ivptr;
+        if ((newptr = obj_ivar_heap_alloc(obj, newsize)) != NULL) {
+            /* ok */
+        }
+        else {
+            newptr = ALLOC_N(VALUE, newsize);
+            FL_UNSET_RAW(obj, ROBJECT_TRANSIENT_FLAG);
+        }
+        ROBJECT(obj)->as.heap.ivptr = newptr;
+        for (i=0; i<(int)len; i++) {
+            newptr[i] = orig_ptr[i];
+        }
+    }
+    else {
+        REALLOC_N(ROBJECT(obj)->as.heap.ivptr, VALUE, newsize);
+        newptr = ROBJECT(obj)->as.heap.ivptr;
+    }
+
+    return newptr;
+}
+
+void
+rb_obj_transient_heap_evacuate(VALUE obj, int promote)
+{
+    if (ROBJ_TRANSIENT_P(obj)) {
+        uint32_t len = ROBJECT_NUMIV(obj);
+        const VALUE *old_ptr = ROBJECT_IVPTR(obj);
+        VALUE *new_ptr;
+
+        if (promote) {
+            new_ptr = ALLOC_N(VALUE, len);
+            FL_UNSET_RAW(obj, ROBJECT_TRANSIENT_FLAG);
+        }
+        else {
+            new_ptr = obj_ivar_heap_alloc(obj, len);
+        }
+        MEMCPY(new_ptr, old_ptr, VALUE, len);
+        ROBJECT(obj)->as.heap.ivptr = new_ptr;
+    }
+}
+
+static VALUE
+obj_ivar_set(VALUE obj, ID id, VALUE val)
 {
     struct ivar_update ivup;
     uint32_t i, len;
 
-    RB_DEBUG_COUNTER_INC(ivar_set_base);
-
-    rb_check_frozen(obj);
-
-    switch (BUILTIN_TYPE(obj)) {
-      case T_OBJECT:
     ivup.iv_extended = 0;
     ivup.u.iv_index_tbl = iv_index_tbl_make(obj);
     iv_index_tbl_extend(&ivup, id);
@@ -1363,23 +1421,37 @@ rb_ivar_set(VALUE obj, ID id, VALUE val)
             uint32_t newsize = iv_index_tbl_newsize(&ivup);
 
             if (RBASIC(obj)->flags & ROBJECT_EMBED) {
-                    newptr = ALLOC_N(VALUE, newsize);
+                newptr = obj_ivar_heap_alloc(obj, newsize);
+                // newptr = ALLOC_N(VALUE, newsize);
                 MEMCPY(newptr, ptr, VALUE, len);
                 RBASIC(obj)->flags &= ~ROBJECT_EMBED;
                 ROBJECT(obj)->as.heap.ivptr = newptr;
             }
             else {
-                    REALLOC_N(ROBJECT(obj)->as.heap.ivptr, VALUE, newsize);
+                newptr = obj_ivar_heap_realloc(obj, len, newsize);
-                    newptr = ROBJECT(obj)->as.heap.ivptr;
             }
-                for (; len < newsize; len++)
+            for (; len < newsize; len++) {
                 newptr[len] = Qundef;
+            }
             ROBJECT(obj)->as.heap.numiv = newsize;
             ROBJECT(obj)->as.heap.iv_index_tbl = ivup.u.iv_index_tbl;
         }
     }
     RB_OBJ_WRITE(obj, &ROBJECT_IVPTR(obj)[ivup.index], val);
-	break;
+
+    return val;
+}
+
+VALUE
+rb_ivar_set(VALUE obj, ID id, VALUE val)
+{
+    RB_DEBUG_COUNTER_INC(ivar_set_base);
+
+    rb_check_frozen(obj);
+
+    switch (BUILTIN_TYPE(obj)) {
+      case T_OBJECT:
+        return obj_ivar_set(obj, id, val);
       case T_CLASS:
       case T_MODULE:
 	if (!RCLASS_IV_TBL(obj)) RCLASS_IV_TBL(obj) = st_init_numtable();