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view src/share/vm/runtime/stackValue.hpp @ 10405:f2110083203d
8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
author | sla |
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date | Mon, 10 Jun 2013 11:30:51 +0200 |
parents | f95d63e2154a |
children |
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/* * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_RUNTIME_STACKVALUE_HPP #define SHARE_VM_RUNTIME_STACKVALUE_HPP #include "code/location.hpp" #include "runtime/handles.hpp" #include "utilities/top.hpp" 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, intptr_t scalar_replaced = 0) { _type = T_OBJECT; _i = scalar_replaced; _o = value; assert(_i == 0 || _o.is_null(), "not null object should not be marked as scalar replaced"); } 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; } bool obj_is_scalar_replaced() const { assert(type() == T_OBJECT, "type check"); return _i != 0; } 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 }; #endif // SHARE_VM_RUNTIME_STACKVALUE_HPP