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