Mercurial > hg > truffle
annotate src/share/vm/runtime/stackValue.hpp @ 6862:8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
Summary: Change the type of various task num fields, parameters etc to unsigned and rename them to be more consistent with the other collectors. Code changes were also reviewed by Vitaly Davidovich.
Reviewed-by: johnc
Contributed-by: Kaushik Srenevasan <kaushik@twitter.com>
| author | johnc |
|---|---|
| date | Sat, 06 Oct 2012 01:17:44 -0700 |
| parents | f95d63e2154a |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 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 | |
| 0 | 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 | |
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44 StackValue(Handle value, intptr_t scalar_replaced = 0) { |
| 0 | 45 _type = T_OBJECT; |
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46 _i = scalar_replaced; |
| 0 | 47 _o = value; |
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48 assert(_i == 0 || _o.is_null(), "not null object should not be marked as scalar replaced"); |
| 0 | 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 | |
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68 bool obj_is_scalar_replaced() const { |
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69 assert(type() == T_OBJECT, "type check"); |
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70 return _i != 0; |
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71 } |
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72 |
| 0 | 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 }; | |
| 1972 | 116 |
| 117 #endif // SHARE_VM_RUNTIME_STACKVALUE_HPP |