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annotate src/share/vm/prims/jvmtiEventController.hpp @ 1657:1a1ce2076047
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author | ysr |
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date | Fri, 16 Jul 2010 10:09:15 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved. |
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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 #ifndef _JAVA_JVMTI_EVENT_CONTROLLER_H_ | |
26 #define _JAVA_JVMTI_EVENT_CONTROLLER_H_ | |
27 | |
28 // forward declaration | |
29 class JvmtiEventControllerPrivate; | |
30 class JvmtiEventController; | |
31 class JvmtiEnvThreadState; | |
32 class JvmtiFramePop; | |
33 class JvmtiEnvBase; | |
34 | |
35 | |
36 // Extension event support | |
37 // | |
38 // jvmtiExtEvent is the extensions equivalent of jvmtiEvent | |
39 // jvmtiExtCallbacks is the extensions equivalent of jvmtiEventCallbacks | |
40 | |
41 // Extension events start JVMTI_MIN_EVENT_TYPE_VAL-1 and work towards 0. | |
42 typedef enum { | |
43 EXT_EVENT_CLASS_UNLOAD = JVMTI_MIN_EVENT_TYPE_VAL-1, | |
44 EXT_MIN_EVENT_TYPE_VAL = EXT_EVENT_CLASS_UNLOAD, | |
45 EXT_MAX_EVENT_TYPE_VAL = EXT_EVENT_CLASS_UNLOAD | |
46 } jvmtiExtEvent; | |
47 | |
48 typedef struct { | |
49 jvmtiExtensionEvent ClassUnload; | |
50 } jvmtiExtEventCallbacks; | |
51 | |
52 | |
53 // The complete range of events is EXT_MIN_EVENT_TYPE_VAL to | |
54 // JVMTI_MAX_EVENT_TYPE_VAL (inclusive and contiguous). | |
55 const int TOTAL_MIN_EVENT_TYPE_VAL = EXT_MIN_EVENT_TYPE_VAL; | |
56 const int TOTAL_MAX_EVENT_TYPE_VAL = JVMTI_MAX_EVENT_TYPE_VAL; | |
57 | |
58 | |
59 /////////////////////////////////////////////////////////////// | |
60 // | |
61 // JvmtiEventEnabled | |
62 // | |
63 // Utility class | |
64 // | |
65 // A boolean array indexed by event_type, used as an internal | |
66 // data structure to track what JVMTI event types are enabled. | |
67 // Used for user set enabling and disabling (globally and on a | |
68 // per thread basis), and for computed merges across environments, | |
69 // threads and the VM as a whole. | |
70 // | |
71 // for inlines see jvmtiEventController_inline.hpp | |
72 // | |
73 | |
74 class JvmtiEventEnabled VALUE_OBJ_CLASS_SPEC { | |
75 private: | |
76 friend class JvmtiEventControllerPrivate; | |
77 jlong _enabled_bits; | |
78 #ifndef PRODUCT | |
79 enum { | |
80 JEE_INIT_GUARD = 0xEAD0 | |
81 } _init_guard; | |
82 #endif | |
83 static jlong bit_for(jvmtiEvent event_type); | |
84 jlong get_bits(); | |
85 void set_bits(jlong bits); | |
86 public: | |
87 JvmtiEventEnabled(); | |
88 void clear(); | |
89 bool is_enabled(jvmtiEvent event_type); | |
90 void set_enabled(jvmtiEvent event_type, bool enabled); | |
91 }; | |
92 | |
93 | |
94 /////////////////////////////////////////////////////////////// | |
95 // | |
96 // JvmtiEnvThreadEventEnable | |
97 // | |
98 // JvmtiEventController data specific to a particular environment and thread. | |
99 // | |
100 // for inlines see jvmtiEventController_inline.hpp | |
101 // | |
102 | |
103 class JvmtiEnvThreadEventEnable VALUE_OBJ_CLASS_SPEC { | |
104 private: | |
105 friend class JvmtiEventControllerPrivate; | |
106 JvmtiEventEnabled _event_user_enabled; | |
107 JvmtiEventEnabled _event_enabled; | |
108 | |
109 public: | |
110 JvmtiEnvThreadEventEnable(); | |
111 ~JvmtiEnvThreadEventEnable(); | |
112 bool is_enabled(jvmtiEvent event_type); | |
113 void set_user_enabled(jvmtiEvent event_type, bool enabled); | |
114 }; | |
115 | |
116 | |
117 /////////////////////////////////////////////////////////////// | |
118 // | |
119 // JvmtiThreadEventEnable | |
120 // | |
121 // JvmtiEventController data specific to a particular thread. | |
122 // | |
123 // for inlines see jvmtiEventController_inline.hpp | |
124 // | |
125 | |
126 class JvmtiThreadEventEnable VALUE_OBJ_CLASS_SPEC { | |
127 private: | |
128 friend class JvmtiEventControllerPrivate; | |
129 JvmtiEventEnabled _event_enabled; | |
130 | |
131 public: | |
132 JvmtiThreadEventEnable(); | |
133 ~JvmtiThreadEventEnable(); | |
134 bool is_enabled(jvmtiEvent event_type); | |
135 }; | |
136 | |
137 | |
138 /////////////////////////////////////////////////////////////// | |
139 // | |
140 // JvmtiEnvEventEnable | |
141 // | |
142 // JvmtiEventController data specific to a particular environment. | |
143 // | |
144 // for inlines see jvmtiEventController_inline.hpp | |
145 // | |
146 | |
147 class JvmtiEnvEventEnable VALUE_OBJ_CLASS_SPEC { | |
148 private: | |
149 friend class JvmtiEventControllerPrivate; | |
150 | |
151 // user set global event enablement indexed by jvmtiEvent | |
152 JvmtiEventEnabled _event_user_enabled; | |
153 | |
154 // this flag indicates the presence (true) or absence (false) of event callbacks | |
155 // it is indexed by jvmtiEvent | |
156 JvmtiEventEnabled _event_callback_enabled; | |
157 | |
158 // indexed by jvmtiEvent true if enabled globally or on any thread. | |
159 // True only if there is a callback for it. | |
160 JvmtiEventEnabled _event_enabled; | |
161 | |
162 public: | |
163 JvmtiEnvEventEnable(); | |
164 ~JvmtiEnvEventEnable(); | |
165 bool is_enabled(jvmtiEvent event_type); | |
166 void set_user_enabled(jvmtiEvent event_type, bool enabled); | |
167 }; | |
168 | |
169 | |
170 /////////////////////////////////////////////////////////////// | |
171 // | |
172 // JvmtiEventController | |
173 // | |
174 // The class is the access point for all actions that change | |
175 // which events are active, this include: | |
176 // enabling and disabling events | |
177 // changing the callbacks/eventhook (they may be null) | |
178 // setting and clearing field watchpoints | |
179 // setting frame pops | |
180 // encountering frame pops | |
181 // | |
182 // for inlines see jvmtiEventController_inline.hpp | |
183 // | |
184 | |
185 class JvmtiEventController : AllStatic { | |
186 private: | |
187 friend class JvmtiEventControllerPrivate; | |
188 | |
189 // for all environments, global array indexed by jvmtiEvent | |
190 static JvmtiEventEnabled _universal_global_event_enabled; | |
191 | |
192 public: | |
193 static bool is_enabled(jvmtiEvent event_type); | |
194 | |
195 // events that can ONLY be enabled/disabled globally (can't toggle on individual threads). | |
196 static bool is_global_event(jvmtiEvent event_type); | |
197 | |
198 // is the event_type valid? | |
199 // to do: check against valid event array | |
200 static bool is_valid_event_type(jvmtiEvent event_type) { | |
201 return ((int)event_type >= TOTAL_MIN_EVENT_TYPE_VAL) | |
202 && ((int)event_type <= TOTAL_MAX_EVENT_TYPE_VAL); | |
203 } | |
204 | |
205 // Use (thread == NULL) to enable/disable an event globally. | |
206 // Use (thread != NULL) to enable/disable an event for a particular thread. | |
207 // thread is ignored for events that can only be specified globally | |
208 static void set_user_enabled(JvmtiEnvBase *env, JavaThread *thread, | |
209 jvmtiEvent event_type, bool enabled); | |
210 | |
211 // Setting callbacks changes computed enablement and must be done | |
212 // at a safepoint otherwise a NULL callback could be attempted | |
213 static void set_event_callbacks(JvmtiEnvBase *env, | |
214 const jvmtiEventCallbacks* callbacks, | |
215 jint size_of_callbacks); | |
216 | |
217 // Sets the callback function for a single extension event and enables | |
218 // (or disables it). | |
219 static void set_extension_event_callback(JvmtiEnvBase* env, | |
220 jint extension_event_index, | |
221 jvmtiExtensionEvent callback); | |
222 | |
223 static void set_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop); | |
224 static void clear_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop); | |
225 static void clear_to_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop); | |
226 | |
227 static void change_field_watch(jvmtiEvent event_type, bool added); | |
228 | |
229 static void thread_started(JavaThread *thread); | |
230 static void thread_ended(JavaThread *thread); | |
231 | |
232 static void env_initialize(JvmtiEnvBase *env); | |
233 static void env_dispose(JvmtiEnvBase *env); | |
234 | |
235 static void vm_start(); | |
236 static void vm_init(); | |
237 static void vm_death(); | |
238 }; | |
239 | |
240 #endif /* _JAVA_JVMTI_EVENT_CONTROLLER_H_ */ |