예제 #1
0
static int phpdbg_create_array_watchpoint(phpdbg_watchpoint_t *zv_watch) {
	zval *zv = zv_watch->addr.zv;
	phpdbg_watchpoint_t *watch = emalloc(sizeof(phpdbg_watchpoint_t));
	HashTable *ht = HT_FROM_ZVP(zv);

	watch->parent = zv_watch;

	if (!ht) {
		return FAILURE;
	}

	phpdbg_create_ht_watchpoint(ht, watch);

	if (phpdbg_create_watchpoint(watch) == NULL) {
		return SUCCESS;
	}

	if (Z_TYPE_P(zv) == IS_ARRAY) {
		watch->flags |= PHPDBG_WATCH_ARRAY;
	} else {
		watch->flags |= PHPDBG_WATCH_OBJECT;
	}

	phpdbg_add_watch_collision(phpdbg_create_refcounted_watchpoint(watch, Z_COUNTED_P(zv)));

	return SUCCESS;
}
예제 #2
0
static void zend_persist_zval_const(zval *z)
{
	zend_uchar flags;
	void *new_ptr;

	switch (Z_TYPE_P(z)) {
		case IS_STRING:
		case IS_CONSTANT:
			flags = Z_GC_FLAGS_P(z) & ~ (IS_STR_PERSISTENT | IS_STR_INTERNED | IS_STR_PERMANENT);
			zend_accel_memdup_interned_string(Z_STR_P(z));
			Z_GC_FLAGS_P(z) |= flags;
			Z_TYPE_FLAGS_P(z) &= ~(IS_TYPE_REFCOUNTED | IS_TYPE_COPYABLE);
			break;
		case IS_ARRAY:
			new_ptr = zend_shared_alloc_get_xlat_entry(Z_ARR_P(z));
			if (new_ptr) {
				Z_ARR_P(z) = new_ptr;
				Z_TYPE_FLAGS_P(z) = IS_TYPE_IMMUTABLE;
			} else {
				if (Z_IMMUTABLE_P(z)) {
					Z_ARR_P(z) = zend_accel_memdup(Z_ARR_P(z), sizeof(zend_array));
					zend_hash_persist_immutable(Z_ARRVAL_P(z));
				} else {
					GC_REMOVE_FROM_BUFFER(Z_ARR_P(z));
					zend_accel_store(Z_ARR_P(z), sizeof(zend_array));
					zend_hash_persist(Z_ARRVAL_P(z), zend_persist_zval);
					/* make immutable array */
					Z_TYPE_FLAGS_P(z) = IS_TYPE_IMMUTABLE;
					GC_REFCOUNT(Z_COUNTED_P(z)) = 2;
					Z_ARRVAL_P(z)->u.flags &= ~HASH_FLAG_APPLY_PROTECTION;
				}
			}
			break;
		case IS_REFERENCE:
			new_ptr = zend_shared_alloc_get_xlat_entry(Z_REF_P(z));
			if (new_ptr) {
				Z_REF_P(z) = new_ptr;
			} else {
				zend_accel_store(Z_REF_P(z), sizeof(zend_reference));
				zend_persist_zval(Z_REFVAL_P(z));
			}
			break;
		case IS_CONSTANT_AST:
			new_ptr = zend_shared_alloc_get_xlat_entry(Z_AST_P(z));
			if (new_ptr) {
				Z_AST_P(z) = new_ptr;
			} else {
				zend_accel_store(Z_AST_P(z), sizeof(zend_ast_ref));
				Z_ASTVAL_P(z) = zend_persist_ast(Z_ASTVAL_P(z));
			}
			break;
	}
}
예제 #3
0
static void phpdbg_remove_watch_collision(phpdbg_watchpoint_t *watch) {
	phpdbg_watch_collision *cur;
	if ((cur = zend_hash_index_find_ptr(&PHPDBG_G(watch_collisions), (zend_ulong) Z_COUNTED_P(watch->addr.zv)))) {
		if (cur->refs && !--cur->refs) {
			phpdbg_delete_watchpoints_recursive(watch);
		}

		zend_hash_del(&cur->watches, watch->str);
		zend_hash_del(&cur->implicit_watches, watch->str);

		if (zend_hash_num_elements(&cur->watches) > 0) {
			cur->watch = Z_PTR_P(zend_hash_get_current_data_ex(&cur->watches, NULL));
		} else if (zend_hash_num_elements(&cur->implicit_watches) > 0) {
			cur->watch = Z_PTR_P(zend_hash_get_current_data_ex(&cur->implicit_watches, NULL));
		} else {
			phpdbg_deactivate_watchpoint(cur->watch);
			phpdbg_remove_watchpoint(cur->watch);

			zend_hash_index_del(&PHPDBG_G(watch_collisions), (zend_ulong) Z_COUNTED_P(watch->addr.zv));
		}
	}
}
예제 #4
0
ZEND_API void zval_internal_ptr_dtor(zval *zval_ptr) /* {{{ */
{
	if (Z_REFCOUNTED_P(zval_ptr)) {
		zend_refcounted *ref = Z_COUNTED_P(zval_ptr);

		if (GC_DELREF(ref) == 0) {
			if (Z_TYPE_P(zval_ptr) == IS_STRING) {
				zend_string *str = (zend_string*)ref;

				CHECK_ZVAL_STRING(str);
				ZEND_ASSERT(!ZSTR_IS_INTERNED(str));
				ZEND_ASSERT((GC_FLAGS(str) & IS_STR_PERSISTENT));
				free(str);
			} else {
				zend_error_noreturn(E_CORE_ERROR, "Internal zval's can't be arrays, objects, resources or reference");
			}
		}
	}
}
예제 #5
0
static phpdbg_watchpoint_t *phpdbg_get_refcount_watch(phpdbg_watchpoint_t *parent) {
	zend_refcounted *ref;
	phpdbg_btree_result *res;

	if (parent->type == WATCH_ON_HASHTABLE) {
		parent = parent->parent;
		if (!parent) {
			return NULL;
		}
	}

	ZEND_ASSERT(parent->type == WATCH_ON_ZVAL);
	ref = Z_COUNTED_P(parent->addr.zv);

	res = phpdbg_btree_find(&PHPDBG_G(watchpoint_tree), (zend_ulong) ref);
	if (res) {
		return res->ptr;
	}
	return NULL;
}
예제 #6
0
static phpdbg_watchpoint_t *phpdbg_create_watchpoint(phpdbg_watchpoint_t *watch) {
	phpdbg_watchpoint_t *ret = watch;

	/* exclude references & refcounted */
	if (!watch->parent || watch->parent->type != WATCH_ON_ZVAL || watch->type == WATCH_ON_HASHTABLE) {
		phpdbg_watchpoint_t *old_watch = zend_hash_find_ptr(&PHPDBG_G(watchpoints), watch->str);

		if (old_watch) {
#define return_and_free_watch(x) { \
	phpdbg_watchpoint_t *ref = phpdbg_get_refcount_watch(old_watch); \
	if (ref) { \
		phpdbg_add_watch_collision(ref); \
	} \
	if (watch != old_watch) { \
		phpdbg_free_watch(watch); \
		efree(watch); \
	} \
	return (x); \
}
			if (watch->flags & PHPDBG_WATCH_RECURSIVE) {
				if (old_watch->flags & PHPDBG_WATCH_RECURSIVE) {
					return_and_free_watch(NULL);
				} else {
					old_watch->flags &= ~(PHPDBG_WATCH_SIMPLE | PHPDBG_WATCH_IMPLICIT);
					old_watch->flags |= PHPDBG_WATCH_RECURSIVE;
					return_and_free_watch(old_watch);
				}
			} else {
				if (!(old_watch->flags & PHPDBG_WATCH_RECURSIVE)) {
					old_watch->flags |= watch->flags & (PHPDBG_WATCH_IMPLICIT | PHPDBG_WATCH_SIMPLE);
				}
				return_and_free_watch(NULL);
			}
		} else {
			if (watch->parent && watch->parent->type == WATCH_ON_HASHTABLE) {
				watch->parent->implicit_ht_count++;
			}
			zend_hash_add_ptr(&PHPDBG_G(watchpoints), watch->str, watch);
		}
	}

	phpdbg_store_watchpoint(watch);

	if (watch->parent && watch->parent->type == WATCH_ON_ZVAL && Z_REFCOUNTED_P(watch->parent->addr.zv)) {
		phpdbg_add_watch_collision(phpdbg_create_refcounted_watchpoint(watch, Z_COUNTED_P(watch->parent->addr.zv)));
	}

	if (watch->type == WATCH_ON_ZVAL) {
		if (watch->parent_container) {
			HashTable *ht_watches;
			phpdbg_btree_result *find;
			if (!(find = phpdbg_btree_find(&PHPDBG_G(watch_HashTables), (zend_ulong) watch->parent_container))) {
				phpdbg_watch_ht_info *hti = emalloc(sizeof(*hti));
				hti->dtor = watch->parent_container->pDestructor;
				ht_watches = &hti->watches;
				zend_hash_init(ht_watches, 0, grrrrr, ZVAL_PTR_DTOR, 0);
				phpdbg_btree_insert(&PHPDBG_G(watch_HashTables), (zend_ulong) watch->parent_container, hti);
				watch->parent_container->pDestructor = (dtor_func_t) phpdbg_watch_HashTable_dtor;
			} else {
				ht_watches = &((phpdbg_watch_ht_info *) find->ptr)->watches;
			}
			zend_hash_add_ptr(ht_watches, watch->name_in_parent, watch);
		}

		if (Z_ISREF_P(watch->addr.zv)) {
			ret = phpdbg_create_reference_watch(watch);
		}
	}

	phpdbg_activate_watchpoint(watch);

	return ret;
}
예제 #7
0
static void gc_scan(zend_refcounted *ref, gc_stack *stack)
{
	HashTable *ht = NULL;
	Bucket *p, *end;
	zval *zv;
	GC_STACK_DCL(stack);

tail_call:
	if (GC_REF_CHECK_COLOR(ref, GC_WHITE)) {
		if (GC_REFCOUNT(ref) > 0) {
			if (!GC_REF_CHECK_COLOR(ref, GC_BLACK)) {
				GC_REF_SET_BLACK(ref);
				if (UNEXPECTED(!_stack->next)) {
					gc_stack_next(_stack);
				}
				/* Split stack and reuse the tail */
				_stack->next->prev = NULL;
				gc_scan_black(ref, _stack->next);
				_stack->next->prev = _stack;
			}
		} else {
			if (GC_TYPE(ref) == IS_OBJECT) {
				zend_object *obj = (zend_object*)ref;

				if (EXPECTED(!(OBJ_FLAGS(ref) & IS_OBJ_FREE_CALLED))) {
					int n;
					zval *zv, *end;

					ht = obj->handlers->get_gc(obj, &zv, &n);
					end = zv + n;
					if (EXPECTED(!ht)) {
						if (!n) goto next;
						while (!Z_REFCOUNTED_P(--end)) {
							if (zv == end) goto next;
						}
					}
					while (zv != end) {
						if (Z_REFCOUNTED_P(zv)) {
							ref = Z_COUNTED_P(zv);
							if (GC_REF_CHECK_COLOR(ref, GC_GREY)) {
								GC_REF_SET_COLOR(ref, GC_WHITE);
								GC_STACK_PUSH(ref);
							}
						}
						zv++;
					}
					if (EXPECTED(!ht)) {
						ref = Z_COUNTED_P(zv);
						if (GC_REF_CHECK_COLOR(ref, GC_GREY)) {
							GC_REF_SET_COLOR(ref, GC_WHITE);
							goto tail_call;
						}
						goto next;
					}
				} else {
					goto next;
				}
			} else if (GC_TYPE(ref) == IS_ARRAY) {
				if ((zend_array*)ref == &EG(symbol_table)) {
					GC_REF_SET_BLACK(ref);
					goto next;
				} else {
					ht = (zend_array*)ref;
				}
			} else if (GC_TYPE(ref) == IS_REFERENCE) {
				if (Z_REFCOUNTED(((zend_reference*)ref)->val)) {
					ref = Z_COUNTED(((zend_reference*)ref)->val);
					if (GC_REF_CHECK_COLOR(ref, GC_GREY)) {
						GC_REF_SET_COLOR(ref, GC_WHITE);
						goto tail_call;
					}
				}
				goto next;
			} else {
				goto next;
			}

			if (!ht->nNumUsed) goto next;
			p = ht->arData;
			end = p + ht->nNumUsed;
			while (1) {
				end--;
				zv = &end->val;
				if (Z_TYPE_P(zv) == IS_INDIRECT) {
					zv = Z_INDIRECT_P(zv);
				}
				if (Z_REFCOUNTED_P(zv)) {
					break;
				}
				if (p == end) goto next;
			}
			while (p != end) {
				zv = &p->val;
				if (Z_TYPE_P(zv) == IS_INDIRECT) {
					zv = Z_INDIRECT_P(zv);
				}
				if (Z_REFCOUNTED_P(zv)) {
					ref = Z_COUNTED_P(zv);
					if (GC_REF_CHECK_COLOR(ref, GC_GREY)) {
						GC_REF_SET_COLOR(ref, GC_WHITE);
						GC_STACK_PUSH(ref);
					}
				}
				p++;
			}
			zv = &p->val;
			if (Z_TYPE_P(zv) == IS_INDIRECT) {
				zv = Z_INDIRECT_P(zv);
			}
			ref = Z_COUNTED_P(zv);
			if (GC_REF_CHECK_COLOR(ref, GC_GREY)) {
				GC_REF_SET_COLOR(ref, GC_WHITE);
				goto tail_call;
			}
		}
	}

next:
	ref = GC_STACK_POP();
	if (ref) {
		goto tail_call;
	}
}
예제 #8
0
static void gc_mark_grey(zend_refcounted *ref, gc_stack *stack)
{
	HashTable *ht = NULL;
	Bucket *p, *end;
	zval *zv;
	GC_STACK_DCL(stack);

	do {
		GC_BENCH_INC(zval_marked_grey);

		if (GC_TYPE(ref) == IS_OBJECT) {
			zend_object *obj = (zend_object*)ref;

			if (EXPECTED(!(OBJ_FLAGS(ref) & IS_OBJ_FREE_CALLED))) {
				int n;
				zval *zv, *end;

				ht = obj->handlers->get_gc(obj, &zv, &n);
				end = zv + n;
				if (EXPECTED(!ht)) {
					if (!n) goto next;
					while (!Z_REFCOUNTED_P(--end)) {
						if (zv == end) goto next;
					}
				}
				while (zv != end) {
					if (Z_REFCOUNTED_P(zv)) {
						ref = Z_COUNTED_P(zv);
						GC_DELREF(ref);
						if (!GC_REF_CHECK_COLOR(ref, GC_GREY)) {
							GC_REF_SET_COLOR(ref, GC_GREY);
							GC_STACK_PUSH(ref);
						}
					}
					zv++;
				}
				if (EXPECTED(!ht)) {
					ref = Z_COUNTED_P(zv);
					GC_DELREF(ref);
					if (!GC_REF_CHECK_COLOR(ref, GC_GREY)) {
						GC_REF_SET_COLOR(ref, GC_GREY);
						continue;
					}
					goto next;
				}
			} else {
				goto next;
			}
		} else if (GC_TYPE(ref) == IS_ARRAY) {
			if (((zend_array*)ref) == &EG(symbol_table)) {
				GC_REF_SET_BLACK(ref);
				goto next;
			} else {
				ht = (zend_array*)ref;
			}
		} else if (GC_TYPE(ref) == IS_REFERENCE) {
			if (Z_REFCOUNTED(((zend_reference*)ref)->val)) {
				ref = Z_COUNTED(((zend_reference*)ref)->val);
				GC_DELREF(ref);
				if (!GC_REF_CHECK_COLOR(ref, GC_GREY)) {
					GC_REF_SET_COLOR(ref, GC_GREY);
					continue;
				}
			}
			goto next;
		} else {
			goto next;
		}

		if (!ht->nNumUsed) goto next;
		p = ht->arData;
		end = p + ht->nNumUsed;
		while (1) {
			end--;
			zv = &end->val;
			if (Z_TYPE_P(zv) == IS_INDIRECT) {
				zv = Z_INDIRECT_P(zv);
			}
			if (Z_REFCOUNTED_P(zv)) {
				break;
			}
			if (p == end) goto next;
		}
		while (p != end) {
			zv = &p->val;
			if (Z_TYPE_P(zv) == IS_INDIRECT) {
				zv = Z_INDIRECT_P(zv);
			}
			if (Z_REFCOUNTED_P(zv)) {
				ref = Z_COUNTED_P(zv);
				GC_DELREF(ref);
				if (!GC_REF_CHECK_COLOR(ref, GC_GREY)) {
					GC_REF_SET_COLOR(ref, GC_GREY);
					GC_STACK_PUSH(ref);
				}
			}
			p++;
		}
		zv = &p->val;
		if (Z_TYPE_P(zv) == IS_INDIRECT) {
			zv = Z_INDIRECT_P(zv);
		}
		ref = Z_COUNTED_P(zv);
		GC_DELREF(ref);
		if (!GC_REF_CHECK_COLOR(ref, GC_GREY)) {
			GC_REF_SET_COLOR(ref, GC_GREY);
			continue;
		}

next:
		ref = GC_STACK_POP();
	} while (ref);
}
예제 #9
0
static void gc_remove_nested_data_from_buffer(zend_refcounted *ref, gc_root_buffer *root)
{
	HashTable *ht = NULL;
	Bucket *p, *end;
	zval *zv;

tail_call:
	if (root ||
	    (GC_REF_ADDRESS(ref) != 0 &&
	     GC_REF_CHECK_COLOR(ref, GC_BLACK))) {
		GC_TRACE_REF(ref, "removing from buffer");
		if (root) {
			gc_remove_from_roots(root);
			GC_REF_SET_INFO(ref, 0);
			root = NULL;
		} else {
			GC_REMOVE_FROM_BUFFER(ref);
		}

		if (GC_TYPE(ref) == IS_OBJECT) {
			zend_object *obj = (zend_object*)ref;

			if (EXPECTED(!(OBJ_FLAGS(ref) & IS_OBJ_FREE_CALLED))) {
				int n;
				zval *zv, *end;

				ht = obj->handlers->get_gc(obj, &zv, &n);
				end = zv + n;
				if (EXPECTED(!ht)) {
					if (!n) return;
					while (!Z_REFCOUNTED_P(--end)) {
						if (zv == end) return;
					}
				}
				while (zv != end) {
					if (Z_REFCOUNTED_P(zv)) {
						ref = Z_COUNTED_P(zv);
						gc_remove_nested_data_from_buffer(ref, NULL);
					}
					zv++;
				}
				if (EXPECTED(!ht)) {
					ref = Z_COUNTED_P(zv);
					goto tail_call;
				}
			} else {
				return;
			}
		} else if (GC_TYPE(ref) == IS_ARRAY) {
			ht = (zend_array*)ref;
		} else if (GC_TYPE(ref) == IS_REFERENCE) {
			if (Z_REFCOUNTED(((zend_reference*)ref)->val)) {
				ref = Z_COUNTED(((zend_reference*)ref)->val);
				goto tail_call;
			}
			return;
		} else {
			return;
		}

		if (!ht->nNumUsed) return;
		p = ht->arData;
		end = p + ht->nNumUsed;
		while (1) {
			end--;
			zv = &end->val;
			if (Z_TYPE_P(zv) == IS_INDIRECT) {
				zv = Z_INDIRECT_P(zv);
			}
			if (Z_REFCOUNTED_P(zv)) {
				break;
			}
			if (p == end) return;
		}
		while (p != end) {
			zv = &p->val;
			if (Z_TYPE_P(zv) == IS_INDIRECT) {
				zv = Z_INDIRECT_P(zv);
			}
			if (Z_REFCOUNTED_P(zv)) {
				ref = Z_COUNTED_P(zv);
				gc_remove_nested_data_from_buffer(ref, NULL);
			}
			p++;
		}
		zv = &p->val;
		if (Z_TYPE_P(zv) == IS_INDIRECT) {
			zv = Z_INDIRECT_P(zv);
		}
		ref = Z_COUNTED_P(zv);
		goto tail_call;
	}
}
예제 #10
0
static int gc_collect_white(zend_refcounted *ref, uint32_t *flags, gc_stack *stack)
{
	int count = 0;
	HashTable *ht = NULL;
	Bucket *p, *end;
	zval *zv;
	GC_STACK_DCL(stack);

	do {
		/* don't count references for compatibility ??? */
		if (GC_TYPE(ref) != IS_REFERENCE) {
			count++;
		}

		if (GC_TYPE(ref) == IS_OBJECT) {
			zend_object *obj = (zend_object*)ref;

			if (EXPECTED(!(OBJ_FLAGS(ref) & IS_OBJ_FREE_CALLED))) {
				int n;
				zval *zv, *end;

				/* optimization: color is GC_BLACK (0) */
				if (!GC_INFO(ref)) {
					gc_add_garbage(ref);
				}
				if (obj->handlers->dtor_obj != zend_objects_destroy_object ||
						obj->ce->destructor != NULL) {
					*flags |= GC_HAS_DESTRUCTORS;
				}
				ht = obj->handlers->get_gc(obj, &zv, &n);
				end = zv + n;
				if (EXPECTED(!ht)) {
					if (!n) goto next;
					while (!Z_REFCOUNTED_P(--end)) {
						/* count non-refcounted for compatibility ??? */
						if (Z_TYPE_P(zv) != IS_UNDEF) {
							count++;
						}
						if (zv == end) goto next;
					}
				}
				while (zv != end) {
					if (Z_REFCOUNTED_P(zv)) {
						ref = Z_COUNTED_P(zv);
						GC_ADDREF(ref);
						if (GC_REF_CHECK_COLOR(ref, GC_WHITE)) {
							GC_REF_SET_BLACK(ref);
							GC_STACK_PUSH(ref);
						}
					/* count non-refcounted for compatibility ??? */
					} else if (Z_TYPE_P(zv) != IS_UNDEF) {
						count++;
					}
					zv++;
				}
				if (EXPECTED(!ht)) {
					ref = Z_COUNTED_P(zv);
					GC_ADDREF(ref);
					if (GC_REF_CHECK_COLOR(ref, GC_WHITE)) {
						GC_REF_SET_BLACK(ref);
						continue;
					}
					goto next;
				}
			} else {
				goto next;
			}
		} else if (GC_TYPE(ref) == IS_ARRAY) {
			/* optimization: color is GC_BLACK (0) */
			if (!GC_INFO(ref)) {
				gc_add_garbage(ref);
			}
			ht = (zend_array*)ref;
		} else if (GC_TYPE(ref) == IS_REFERENCE) {
			if (Z_REFCOUNTED(((zend_reference*)ref)->val)) {
				ref = Z_COUNTED(((zend_reference*)ref)->val);
				GC_ADDREF(ref);
				if (GC_REF_CHECK_COLOR(ref, GC_WHITE)) {
					GC_REF_SET_BLACK(ref);
					continue;
				}
			}
			goto next;
		} else {
			goto next;
		}

		if (!ht->nNumUsed) goto next;
		p = ht->arData;
		end = p + ht->nNumUsed;
		while (1) {
			end--;
			zv = &end->val;
			if (Z_TYPE_P(zv) == IS_INDIRECT) {
				zv = Z_INDIRECT_P(zv);
			}
			if (Z_REFCOUNTED_P(zv)) {
				break;
			}
			/* count non-refcounted for compatibility ??? */
			if (Z_TYPE_P(zv) != IS_UNDEF) {
				count++;
			}
			if (p == end) goto next;
		}
		while (p != end) {
			zv = &p->val;
			if (Z_TYPE_P(zv) == IS_INDIRECT) {
				zv = Z_INDIRECT_P(zv);
			}
			if (Z_REFCOUNTED_P(zv)) {
				ref = Z_COUNTED_P(zv);
				GC_ADDREF(ref);
				if (GC_REF_CHECK_COLOR(ref, GC_WHITE)) {
					GC_REF_SET_BLACK(ref);
					GC_STACK_PUSH(ref);
				}
				/* count non-refcounted for compatibility ??? */
			} else if (Z_TYPE_P(zv) != IS_UNDEF) {
				count++;
			}
			p++;
		}
		zv = &p->val;
		if (Z_TYPE_P(zv) == IS_INDIRECT) {
			zv = Z_INDIRECT_P(zv);
		}
		ref = Z_COUNTED_P(zv);
		GC_ADDREF(ref);
		if (GC_REF_CHECK_COLOR(ref, GC_WHITE)) {
			GC_REF_SET_BLACK(ref);
			continue;
		}

next:
		ref = GC_STACK_POP();
	} while (ref);

	return count;
}
예제 #11
0
파일: apc_cache.c 프로젝트: Cum6upck/apcu
/* {{{ my_copy_zval */
static APC_HOTSPOT void my_copy_zval(zval* dst, const zval* src, apc_context_t* ctxt)
{
    apc_pool* pool = ctxt->pool;

    assert(dst != NULL);
    assert(src != NULL);

	memcpy(dst, src, sizeof(zval));
	
	if (Z_REFCOUNTED_P(src)) {
		if (zend_hash_num_elements(&ctxt->copied)) {
            zval *rc = zend_hash_index_find(
                    &ctxt->copied, (uintptr_t) Z_COUNTED_P(src));
            if (rc) {
				ZVAL_COPY(dst, rc);
				return;
            }
		}
	}

    switch (Z_TYPE_P(src)) {
    case IS_RESOURCE:
    case IS_TRUE:
    case IS_FALSE:
    case IS_LONG:
    case IS_DOUBLE:
    case IS_NULL:
        break;

	case IS_REFERENCE:
		Z_REF_P(dst) = my_copy_reference(Z_REF_P(src), ctxt);
	break;

	case IS_INDIRECT:
		my_copy_zval(dst, Z_INDIRECT_P(src), ctxt);
	break;

    case IS_CONSTANT:
    case IS_STRING:	
		if (ctxt->copy == APC_COPY_OUT) {
			ZVAL_DUP(dst, src);
		} else {
			Z_TYPE_INFO_P(dst) = IS_STRING_EX;
			Z_STR_P(dst) = apc_pstrcpy(Z_STR_P(src), pool);
		}
        break;

    case IS_ARRAY:
        if(ctxt->serializer == NULL) {
			Z_ARRVAL_P(dst) = my_copy_hashtable(Z_ARRVAL_P(src), ctxt);
            break;
        }

		/* break intentionally omitted */

    case IS_OBJECT:
        if(ctxt->copy == APC_COPY_IN) {
            dst = my_serialize_object(dst, src, ctxt);
        } else dst = my_unserialize_object(dst, src, ctxt);
        break;

    case IS_CALLABLE:
        /* XXX implement this */
        assert(0);
        break;

    default:
        assert(0);
    }

	if (Z_REFCOUNTED_P(dst) && ctxt->copied.nTableSize) {
		zend_hash_index_update(&ctxt->copied, (uintptr_t) Z_COUNTED_P(src), dst);
	}
}