Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/runtime/stackValue.hpp
src/share/vm/runtime/stackValue.hpp
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| 1 /* | |
| 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #ifndef SHARE_VM_RUNTIME_STACKVALUE_HPP | |
| 26 #define SHARE_VM_RUNTIME_STACKVALUE_HPP | |
| 27 | |
| 28 #include "code/location.hpp" | |
| 29 #include "runtime/handles.hpp" | |
| 30 #include "utilities/top.hpp" | |
| 31 | |
| 32 class StackValue : public ResourceObj { | |
| 33 private: | |
| 34 BasicType _type; | |
| 35 intptr_t _i; // Blank java stack slot value | |
| 36 Handle _o; // Java stack slot value interpreted as a Handle | |
| 37 public: | |
| 38 | |
| 39 StackValue(intptr_t value) { | |
| 40 _type = T_INT; | |
| 41 _i = value; | |
| 42 } | |
| 43 | |
| 44 StackValue(Handle value, intptr_t scalar_replaced = 0) { | |
| 45 _type = T_OBJECT; | |
| 46 _i = scalar_replaced; | |
| 47 _o = value; | |
| 48 assert(_i == 0 || _o.is_null(), "not null object should not be marked as scalar replaced"); | |
| 49 } | |
| 50 | |
| 51 StackValue() { | |
| 52 _type = T_CONFLICT; | |
| 53 _i = 0; | |
| 54 } | |
| 55 | |
| 56 // Only used during deopt- preserve object type. | |
| 57 StackValue(intptr_t o, BasicType t) { | |
| 58 assert(t == T_OBJECT, "should not be used"); | |
| 59 _type = t; | |
| 60 _i = o; | |
| 61 } | |
| 62 | |
| 63 Handle get_obj() const { | |
| 64 assert(type() == T_OBJECT, "type check"); | |
| 65 return _o; | |
| 66 } | |
| 67 | |
| 68 bool obj_is_scalar_replaced() const { | |
| 69 assert(type() == T_OBJECT, "type check"); | |
| 70 return _i != 0; | |
| 71 } | |
| 72 | |
| 73 void set_obj(Handle value) { | |
| 74 assert(type() == T_OBJECT, "type check"); | |
| 75 _o = value; | |
| 76 } | |
| 77 | |
| 78 intptr_t get_int() const { | |
| 79 assert(type() == T_INT, "type check"); | |
| 80 return _i; | |
| 81 } | |
| 82 | |
| 83 // For special case in deopt. | |
| 84 intptr_t get_int(BasicType t) const { | |
| 85 assert(t == T_OBJECT && type() == T_OBJECT, "type check"); | |
| 86 return _i; | |
| 87 } | |
| 88 | |
| 89 void set_int(intptr_t value) { | |
| 90 assert(type() == T_INT, "type check"); | |
| 91 _i = value; | |
| 92 } | |
| 93 | |
| 94 BasicType type() const { return _type; } | |
| 95 | |
| 96 bool equal(StackValue *value) { | |
| 97 if (_type != value->_type) return false; | |
| 98 if (_type == T_OBJECT) | |
| 99 return (_o == value->_o); | |
| 100 else { | |
| 101 assert(_type == T_INT, "sanity check"); | |
| 102 // [phh] compare only low addressed portions of intptr_t slots | |
| 103 return (*(int *)&_i == *(int *)&value->_i); | |
| 104 } | |
| 105 } | |
| 106 | |
| 107 static StackValue* create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv); | |
| 108 static BasicLock* resolve_monitor_lock(const frame* fr, Location location); | |
| 109 | |
| 110 #ifndef PRODUCT | |
| 111 public: | |
| 112 // Printing | |
| 113 void print_on(outputStream* st) const; | |
| 114 #endif | |
| 115 }; | |
| 116 | |
| 117 #endif // SHARE_VM_RUNTIME_STACKVALUE_HPP |
