--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/stackValue.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,101 @@
+/*
+ * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+class StackValue : public ResourceObj {
+ private:
+ BasicType _type;
+ intptr_t _i; // Blank java stack slot value
+ Handle _o; // Java stack slot value interpreted as a Handle
+ public:
+
+ StackValue(intptr_t value) {
+ _type = T_INT;
+ _i = value;
+ }
+
+ StackValue(Handle value) {
+ _type = T_OBJECT;
+ _o = value;
+ }
+
+ StackValue() {
+ _type = T_CONFLICT;
+ _i = 0;
+ }
+
+ // Only used during deopt- preserve object type.
+ StackValue(intptr_t o, BasicType t) {
+ assert(t == T_OBJECT, "should not be used");
+ _type = t;
+ _i = o;
+ }
+
+ Handle get_obj() const {
+ assert(type() == T_OBJECT, "type check");
+ return _o;
+ }
+
+ void set_obj(Handle value) {
+ assert(type() == T_OBJECT, "type check");
+ _o = value;
+ }
+
+ intptr_t get_int() const {
+ assert(type() == T_INT, "type check");
+ return _i;
+ }
+
+ // For special case in deopt.
+ intptr_t get_int(BasicType t) const {
+ assert(t == T_OBJECT && type() == T_OBJECT, "type check");
+ return _i;
+ }
+
+ void set_int(intptr_t value) {
+ assert(type() == T_INT, "type check");
+ _i = value;
+ }
+
+ BasicType type() const { return _type; }
+
+ bool equal(StackValue *value) {
+ if (_type != value->_type) return false;
+ if (_type == T_OBJECT)
+ return (_o == value->_o);
+ else {
+ assert(_type == T_INT, "sanity check");
+ // [phh] compare only low addressed portions of intptr_t slots
+ return (*(int *)&_i == *(int *)&value->_i);
+ }
+ }
+
+ static StackValue* create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv);
+ static BasicLock* resolve_monitor_lock(const frame* fr, Location location);
+
+#ifndef PRODUCT
+ public:
+ // Printing
+ void print_on(outputStream* st) const;
+#endif
+};