Mercurial > hg > graal-compiler
diff src/share/vm/runtime/stackValue.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | b109e761e927 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/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 +};