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annotate src/share/vm/runtime/java.hpp @ 3109:3664989976e2
Merge
author | Gilles Duboscq <gilles.duboscq@oracle.com> |
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date | Fri, 01 Jul 2011 12:57:10 +0200 |
parents | 3582bf76420e |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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_JAVA_HPP |
26 #define SHARE_VM_RUNTIME_JAVA_HPP | |
27 | |
28 #include "runtime/os.hpp" | |
29 | |
0 | 30 // Register function to be called by before_exit |
31 extern "C" { void register_on_exit_function(void (*func)(void)) ;} | |
32 | |
33 // Execute code before all handles are released and thread is killed; prologue to vm_exit | |
34 extern void before_exit(JavaThread * thread); | |
35 | |
36 // Forced VM exit (i.e, internal error or JVM_Exit) | |
37 extern void vm_exit(int code); | |
38 | |
39 // Wrapper for ::exit() | |
40 extern void vm_direct_exit(int code); | |
41 | |
42 // Shutdown the VM but do not exit the process | |
43 extern void vm_shutdown(); | |
44 // Shutdown the VM and abort the process | |
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45 extern void vm_abort(bool dump_core=true); |
0 | 46 |
47 // Trigger any necessary notification of the VM being shutdown | |
48 extern void notify_vm_shutdown(); | |
49 | |
50 // VM exit if error occurs during initialization of VM | |
51 extern void vm_exit_during_initialization(Handle exception); | |
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52 extern void vm_exit_during_initialization(Symbol* exception_name, const char* message); |
0 | 53 extern void vm_exit_during_initialization(const char* error, const char* message = NULL); |
54 extern void vm_shutdown_during_initialization(const char* error, const char* message = NULL); | |
55 | |
242 | 56 /** |
57 * Discovering the JDK_Version during initialization is tricky when the | |
58 * running JDK is less than JDK6. For JDK6 and greater, a "GetVersion" | |
59 * function exists in libjava.so and we simply call it during the | |
60 * 'initialize()' call to find the version. For JDKs with version < 6, no | |
61 * such call exists and we have to probe the JDK in order to determine | |
62 * the exact version. This probing cannot happen during late in | |
63 * the VM initialization process so there's a period of time during | |
64 * initialization when we don't know anything about the JDK version other than | |
65 * that it less than version 6. This is the "partially initialized" time, | |
66 * when we can answer only certain version queries (such as, is the JDK | |
67 * version greater than 5? Answer: no). Once the JDK probing occurs, we | |
68 * know the version and are considered fully initialized. | |
69 */ | |
70 class JDK_Version VALUE_OBJ_CLASS_SPEC { | |
0 | 71 friend class VMStructs; |
242 | 72 friend class Universe; |
73 friend void JDK_Version_init(); | |
0 | 74 private: |
242 | 75 |
76 static JDK_Version _current; | |
77 | |
78 // In this class, we promote the minor version of release to be the | |
79 // major version for releases >= 5 in anticipation of the JDK doing the | |
80 // same thing. For example, we represent "1.5.0" as major version 5 (we | |
81 // drop the leading 1 and use 5 as the 'major'). | |
82 | |
83 uint8_t _major; | |
84 uint8_t _minor; | |
85 uint8_t _micro; | |
86 uint8_t _update; | |
87 uint8_t _special; | |
88 uint8_t _build; | |
89 | |
90 // If partially initialized, the above fields are invalid and we know | |
91 // that we're less than major version 6. | |
92 bool _partially_initialized; | |
93 | |
94 bool _thread_park_blocker; | |
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95 bool _post_vm_init_hook_enabled; |
242 | 96 |
97 bool is_valid() const { | |
98 return (_major != 0 || _partially_initialized); | |
99 } | |
100 | |
101 // initializes or partially initializes the _current static field | |
102 static void initialize(); | |
103 | |
104 // Completes initialization for a pre-JDK6 version. | |
105 static void fully_initialize(uint8_t major, uint8_t minor = 0, | |
106 uint8_t micro = 0, uint8_t update = 0); | |
0 | 107 |
108 public: | |
242 | 109 |
110 // Returns true if the the current version has only been partially initialized | |
111 static bool is_partially_initialized() { | |
112 return _current._partially_initialized; | |
113 } | |
114 | |
115 JDK_Version() : _major(0), _minor(0), _micro(0), _update(0), | |
116 _special(0), _build(0), _partially_initialized(false), | |
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117 _thread_park_blocker(false), _post_vm_init_hook_enabled(false) {} |
0 | 118 |
242 | 119 JDK_Version(uint8_t major, uint8_t minor = 0, uint8_t micro = 0, |
120 uint8_t update = 0, uint8_t special = 0, uint8_t build = 0, | |
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121 bool thread_park_blocker = false, bool post_vm_init_hook_enabled = false) : |
242 | 122 _major(major), _minor(minor), _micro(micro), _update(update), |
123 _special(special), _build(build), _partially_initialized(false), | |
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124 _thread_park_blocker(thread_park_blocker), |
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125 _post_vm_init_hook_enabled(post_vm_init_hook_enabled) {} |
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126 |
242 | 127 // Returns the current running JDK version |
128 static JDK_Version current() { return _current; } | |
129 | |
130 // Factory methods for convenience | |
131 static JDK_Version jdk(uint8_t m) { | |
132 return JDK_Version(m); | |
133 } | |
134 | |
135 static JDK_Version jdk_update(uint8_t major, uint8_t update_number) { | |
136 return JDK_Version(major, 0, 0, update_number); | |
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137 } |
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138 |
242 | 139 uint8_t major_version() const { return _major; } |
140 uint8_t minor_version() const { return _minor; } | |
141 uint8_t micro_version() const { return _micro; } | |
142 uint8_t update_version() const { return _update; } | |
143 uint8_t special_update_version() const { return _special; } | |
144 uint8_t build_number() const { return _build; } | |
145 | |
146 bool supports_thread_park_blocker() const { | |
147 return _thread_park_blocker; | |
148 } | |
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149 bool post_vm_init_hook_enabled() const { |
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150 return _post_vm_init_hook_enabled; |
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151 } |
242 | 152 |
153 // Performs a full ordering comparison using all fields (update, build, etc.) | |
154 int compare(const JDK_Version& other) const; | |
155 | |
156 /** | |
157 * Performs comparison using only the major version, returning negative | |
158 * if the major version of 'this' is less than the parameter, 0 if it is | |
159 * equal, and a positive value if it is greater. | |
160 */ | |
161 int compare_major(int version) const { | |
162 if (_partially_initialized) { | |
163 if (version >= 6) { | |
164 return -1; | |
165 } else { | |
166 assert(false, "Can't make this comparison during init time"); | |
167 return -1; // conservative | |
168 } | |
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169 } else { |
242 | 170 return major_version() - version; |
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171 } |
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172 } |
0 | 173 |
242 | 174 void to_string(char* buffer, size_t buflen) const; |
175 | |
176 // Convenience methods for queries on the current major/minor version | |
177 static bool is_jdk12x_version() { | |
178 return current().compare_major(2) == 0; | |
179 } | |
180 | |
181 static bool is_jdk13x_version() { | |
182 return current().compare_major(3) == 0; | |
183 } | |
184 | |
185 static bool is_jdk14x_version() { | |
186 return current().compare_major(4) == 0; | |
187 } | |
188 | |
189 static bool is_jdk15x_version() { | |
190 return current().compare_major(5) == 0; | |
191 } | |
192 | |
193 static bool is_jdk16x_version() { | |
194 return current().compare_major(6) == 0; | |
195 } | |
196 | |
197 static bool is_jdk17x_version() { | |
198 return current().compare_major(7) == 0; | |
199 } | |
200 | |
201 static bool is_gte_jdk13x_version() { | |
202 return current().compare_major(3) >= 0; | |
203 } | |
0 | 204 |
205 static bool is_gte_jdk14x_version() { | |
242 | 206 return current().compare_major(4) >= 0; |
0 | 207 } |
242 | 208 |
209 static bool is_gte_jdk15x_version() { | |
210 return current().compare_major(5) >= 0; | |
211 } | |
212 | |
0 | 213 static bool is_gte_jdk16x_version() { |
242 | 214 return current().compare_major(6) >= 0; |
0 | 215 } |
216 | |
217 static bool is_gte_jdk17x_version() { | |
242 | 218 return current().compare_major(7) >= 0; |
0 | 219 } |
220 }; | |
1972 | 221 |
222 #endif // SHARE_VM_RUNTIME_JAVA_HPP |