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annotate src/share/vm/runtime/stubCodeGenerator.hpp @ 4724:0841c0ec2ed6
7123810: new hotspot build - hs23-b10
Reviewed-by: jcoomes
author | amurillo |
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date | Fri, 23 Dec 2011 15:29:34 -0800 |
parents | f8c9417e3571 |
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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_STUBCODEGENERATOR_HPP |
26 #define SHARE_VM_RUNTIME_STUBCODEGENERATOR_HPP | |
27 | |
28 #include "asm/assembler.hpp" | |
29 #include "memory/allocation.hpp" | |
30 | |
0 | 31 // All the basic framework for stubcode generation/debugging/printing. |
32 | |
33 | |
34 // A StubCodeDesc describes a piece of generated code (usually stubs). | |
35 // This information is mainly useful for debugging and printing. | |
36 // Currently, code descriptors are simply chained in a linked list, | |
37 // this may have to change if searching becomes too slow. | |
38 | |
39 class StubCodeDesc: public CHeapObj { | |
40 protected: | |
41 static StubCodeDesc* _list; // the list of all descriptors | |
42 static int _count; // length of list | |
43 | |
44 StubCodeDesc* _next; // the next element in the linked list | |
45 const char* _group; // the group to which the stub code belongs | |
46 const char* _name; // the name assigned to the stub code | |
47 int _index; // serial number assigned to the stub | |
48 address _begin; // points to the first byte of the stub code (included) | |
49 address _end; // points to the first byte after the stub code (excluded) | |
50 | |
51 void set_end(address end) { | |
52 assert(_begin <= end, "begin & end not properly ordered"); | |
53 _end = end; | |
54 } | |
55 | |
56 void set_begin(address begin) { | |
57 assert(begin >= _begin, "begin may not decrease"); | |
58 assert(_end == NULL || begin <= _end, "begin & end not properly ordered"); | |
59 _begin = begin; | |
60 } | |
61 | |
62 friend class StubCodeMark; | |
63 friend class StubCodeGenerator; | |
64 | |
65 public: | |
66 static StubCodeDesc* desc_for(address pc); // returns the code descriptor for the code containing pc or NULL | |
67 static StubCodeDesc* desc_for_index(int); // returns the code descriptor for the index or NULL | |
68 static const char* name_for(address pc); // returns the name of the code containing pc or NULL | |
69 | |
70 StubCodeDesc(const char* group, const char* name, address begin) { | |
71 assert(name != NULL, "no name specified"); | |
72 _next = _list; | |
73 _group = group; | |
74 _name = name; | |
75 _index = ++_count; // (never zero) | |
76 _begin = begin; | |
77 _end = NULL; | |
78 _list = this; | |
79 }; | |
80 | |
81 const char* group() const { return _group; } | |
82 const char* name() const { return _name; } | |
83 int index() const { return _index; } | |
84 address begin() const { return _begin; } | |
85 address end() const { return _end; } | |
86 int size_in_bytes() const { return _end - _begin; } | |
87 bool contains(address pc) const { return _begin <= pc && pc < _end; } | |
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88 void print_on(outputStream* st) const; |
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89 void print() const { print_on(tty); } |
0 | 90 }; |
91 | |
92 // The base class for all stub-generating code generators. | |
93 // Provides utility functions. | |
94 | |
95 class StubCodeGenerator: public StackObj { | |
96 protected: | |
97 MacroAssembler* _masm; | |
98 | |
99 StubCodeDesc* _first_stub; | |
100 StubCodeDesc* _last_stub; | |
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101 bool _print_code; |
0 | 102 |
103 public: | |
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104 StubCodeGenerator(CodeBuffer* code, bool print_code = false); |
0 | 105 ~StubCodeGenerator(); |
106 | |
107 MacroAssembler* assembler() const { return _masm; } | |
108 | |
109 virtual void stub_prolog(StubCodeDesc* cdesc); // called by StubCodeMark constructor | |
110 virtual void stub_epilog(StubCodeDesc* cdesc); // called by StubCodeMark destructor | |
111 }; | |
112 | |
113 | |
114 // Stack-allocated helper class used to assciate a stub code with a name. | |
115 // All stub code generating functions that use a StubCodeMark will be registered | |
116 // in the global StubCodeDesc list and the generated stub code can be identified | |
117 // later via an address pointing into it. | |
118 | |
119 class StubCodeMark: public StackObj { | |
120 protected: | |
121 StubCodeGenerator* _cgen; | |
122 StubCodeDesc* _cdesc; | |
123 | |
124 public: | |
125 StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name); | |
126 ~StubCodeMark(); | |
127 | |
128 }; | |
1972 | 129 |
130 #endif // SHARE_VM_RUNTIME_STUBCODEGENERATOR_HPP |