Mercurial > hg > truffle
annotate src/share/vm/runtime/stackValue.hpp @ 1764:14197af1010e
Merge
author | never |
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date | Fri, 27 Aug 2010 17:35:08 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2009, 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 | |
25 class StackValue : public ResourceObj { | |
26 private: | |
27 BasicType _type; | |
28 intptr_t _i; // Blank java stack slot value | |
29 Handle _o; // Java stack slot value interpreted as a Handle | |
30 public: | |
31 | |
32 StackValue(intptr_t value) { | |
33 _type = T_INT; | |
34 _i = value; | |
35 } | |
36 | |
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37 StackValue(Handle value, intptr_t scalar_replaced = 0) { |
0 | 38 _type = T_OBJECT; |
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39 _i = scalar_replaced; |
0 | 40 _o = value; |
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41 assert(_i == 0 || _o.is_null(), "not null object should not be marked as scalar replaced"); |
0 | 42 } |
43 | |
44 StackValue() { | |
45 _type = T_CONFLICT; | |
46 _i = 0; | |
47 } | |
48 | |
49 // Only used during deopt- preserve object type. | |
50 StackValue(intptr_t o, BasicType t) { | |
51 assert(t == T_OBJECT, "should not be used"); | |
52 _type = t; | |
53 _i = o; | |
54 } | |
55 | |
56 Handle get_obj() const { | |
57 assert(type() == T_OBJECT, "type check"); | |
58 return _o; | |
59 } | |
60 | |
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61 bool obj_is_scalar_replaced() const { |
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62 assert(type() == T_OBJECT, "type check"); |
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63 return _i != 0; |
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64 } |
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65 |
0 | 66 void set_obj(Handle value) { |
67 assert(type() == T_OBJECT, "type check"); | |
68 _o = value; | |
69 } | |
70 | |
71 intptr_t get_int() const { | |
72 assert(type() == T_INT, "type check"); | |
73 return _i; | |
74 } | |
75 | |
76 // For special case in deopt. | |
77 intptr_t get_int(BasicType t) const { | |
78 assert(t == T_OBJECT && type() == T_OBJECT, "type check"); | |
79 return _i; | |
80 } | |
81 | |
82 void set_int(intptr_t value) { | |
83 assert(type() == T_INT, "type check"); | |
84 _i = value; | |
85 } | |
86 | |
87 BasicType type() const { return _type; } | |
88 | |
89 bool equal(StackValue *value) { | |
90 if (_type != value->_type) return false; | |
91 if (_type == T_OBJECT) | |
92 return (_o == value->_o); | |
93 else { | |
94 assert(_type == T_INT, "sanity check"); | |
95 // [phh] compare only low addressed portions of intptr_t slots | |
96 return (*(int *)&_i == *(int *)&value->_i); | |
97 } | |
98 } | |
99 | |
100 static StackValue* create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv); | |
101 static BasicLock* resolve_monitor_lock(const frame* fr, Location location); | |
102 | |
103 #ifndef PRODUCT | |
104 public: | |
105 // Printing | |
106 void print_on(outputStream* st) const; | |
107 #endif | |
108 }; |