Mercurial > hg > graal-compiler
annotate src/share/vm/prims/jvmtiExtensions.cpp @ 1711:a6bff45449bc
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
author | ysr |
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date | Tue, 10 Aug 2010 14:53:35 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. |
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12 * version 2 for more details (a copy is included in the LICENSE file that | |
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15 * You should have received a copy of the GNU General Public License version | |
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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 # include "incls/_precompiled.incl" | |
26 # include "incls/_jvmtiExtensions.cpp.incl" | |
27 | |
28 // the list of extension functions | |
29 GrowableArray<jvmtiExtensionFunctionInfo*>* JvmtiExtensions::_ext_functions; | |
30 | |
31 // the list of extension events | |
32 GrowableArray<jvmtiExtensionEventInfo*>* JvmtiExtensions::_ext_events; | |
33 | |
34 | |
35 // extension function | |
36 static jvmtiError JNICALL IsClassUnloadingEnabled(const jvmtiEnv* env, jboolean* enabled, ...) { | |
37 if (enabled == NULL) { | |
38 return JVMTI_ERROR_NULL_POINTER; | |
39 } | |
40 *enabled = (jboolean)ClassUnloading; | |
41 return JVMTI_ERROR_NONE; | |
42 } | |
43 | |
44 // register extension functions and events. In this implementation we | |
45 // have a single extension function (to prove the API) that tests if class | |
46 // unloading is enabled or disabled. We also have a single extension event | |
47 // EXT_EVENT_CLASS_UNLOAD which is used to provide the JVMDI_EVENT_CLASS_UNLOAD | |
48 // event. The function and the event are registered here. | |
49 // | |
50 void JvmtiExtensions::register_extensions() { | |
51 _ext_functions = new (ResourceObj::C_HEAP) GrowableArray<jvmtiExtensionFunctionInfo*>(1,true); | |
52 _ext_events = new (ResourceObj::C_HEAP) GrowableArray<jvmtiExtensionEventInfo*>(1,true); | |
53 | |
54 // register our extension function | |
55 static jvmtiParamInfo func_params[] = { | |
56 { (char*)"IsClassUnloadingEnabled", JVMTI_KIND_OUT, JVMTI_TYPE_JBOOLEAN, JNI_FALSE } | |
57 }; | |
58 static jvmtiExtensionFunctionInfo ext_func = { | |
59 (jvmtiExtensionFunction)IsClassUnloadingEnabled, | |
60 (char*)"com.sun.hotspot.functions.IsClassUnloadingEnabled", | |
61 (char*)"Tell if class unloading is enabled (-noclassgc)", | |
62 sizeof(func_params)/sizeof(func_params[0]), | |
63 func_params, | |
64 0, // no non-universal errors | |
65 NULL | |
66 }; | |
67 _ext_functions->append(&ext_func); | |
68 | |
69 // register our extension event | |
70 | |
71 static jvmtiParamInfo event_params[] = { | |
72 { (char*)"JNI Environment", JVMTI_KIND_IN, JVMTI_TYPE_JNIENV, JNI_FALSE }, | |
73 { (char*)"Thread", JVMTI_KIND_IN, JVMTI_TYPE_JTHREAD, JNI_FALSE }, | |
74 { (char*)"Class", JVMTI_KIND_IN, JVMTI_TYPE_JCLASS, JNI_FALSE } | |
75 }; | |
76 static jvmtiExtensionEventInfo ext_event = { | |
77 EXT_EVENT_CLASS_UNLOAD, | |
78 (char*)"com.sun.hotspot.events.ClassUnload", | |
79 (char*)"CLASS_UNLOAD event", | |
80 sizeof(event_params)/sizeof(event_params[0]), | |
81 event_params | |
82 }; | |
83 _ext_events->append(&ext_event); | |
84 } | |
85 | |
86 | |
87 // return the list of extension functions | |
88 | |
89 jvmtiError JvmtiExtensions::get_functions(JvmtiEnv* env, | |
90 jint* extension_count_ptr, | |
91 jvmtiExtensionFunctionInfo** extensions) | |
92 { | |
93 guarantee(_ext_functions != NULL, "registration not done"); | |
94 | |
95 ResourceTracker rt(env); | |
96 | |
97 jvmtiExtensionFunctionInfo* ext_funcs; | |
98 jvmtiError err = rt.allocate(_ext_functions->length() * | |
99 sizeof(jvmtiExtensionFunctionInfo), | |
100 (unsigned char**)&ext_funcs); | |
101 if (err != JVMTI_ERROR_NONE) { | |
102 return err; | |
103 } | |
104 | |
105 for (int i=0; i<_ext_functions->length(); i++ ) { | |
106 ext_funcs[i].func = _ext_functions->at(i)->func; | |
107 | |
108 char *id = _ext_functions->at(i)->id; | |
109 err = rt.allocate(strlen(id)+1, (unsigned char**)&(ext_funcs[i].id)); | |
110 if (err != JVMTI_ERROR_NONE) { | |
111 return err; | |
112 } | |
113 strcpy(ext_funcs[i].id, id); | |
114 | |
115 char *desc = _ext_functions->at(i)->short_description; | |
116 err = rt.allocate(strlen(desc)+1, | |
117 (unsigned char**)&(ext_funcs[i].short_description)); | |
118 if (err != JVMTI_ERROR_NONE) { | |
119 return err; | |
120 } | |
121 strcpy(ext_funcs[i].short_description, desc); | |
122 | |
123 // params | |
124 | |
125 jint param_count = _ext_functions->at(i)->param_count; | |
126 | |
127 ext_funcs[i].param_count = param_count; | |
128 if (param_count == 0) { | |
129 ext_funcs[i].params = NULL; | |
130 } else { | |
131 err = rt.allocate(param_count*sizeof(jvmtiParamInfo), | |
132 (unsigned char**)&(ext_funcs[i].params)); | |
133 if (err != JVMTI_ERROR_NONE) { | |
134 return err; | |
135 } | |
136 jvmtiParamInfo* src_params = _ext_functions->at(i)->params; | |
137 jvmtiParamInfo* dst_params = ext_funcs[i].params; | |
138 | |
139 for (int j=0; j<param_count; j++) { | |
140 err = rt.allocate(strlen(src_params[j].name)+1, | |
141 (unsigned char**)&(dst_params[j].name)); | |
142 if (err != JVMTI_ERROR_NONE) { | |
143 return err; | |
144 } | |
145 strcpy(dst_params[j].name, src_params[j].name); | |
146 | |
147 dst_params[j].kind = src_params[j].kind; | |
148 dst_params[j].base_type = src_params[j].base_type; | |
149 dst_params[j].null_ok = src_params[j].null_ok; | |
150 } | |
151 } | |
152 | |
153 // errors | |
154 | |
155 jint error_count = _ext_functions->at(i)->error_count; | |
156 ext_funcs[i].error_count = error_count; | |
157 if (error_count == 0) { | |
158 ext_funcs[i].errors = NULL; | |
159 } else { | |
160 err = rt.allocate(error_count*sizeof(jvmtiError), | |
161 (unsigned char**)&(ext_funcs[i].errors)); | |
162 if (err != JVMTI_ERROR_NONE) { | |
163 return err; | |
164 } | |
165 memcpy(ext_funcs[i].errors, _ext_functions->at(i)->errors, | |
166 error_count*sizeof(jvmtiError)); | |
167 } | |
168 } | |
169 | |
170 *extension_count_ptr = _ext_functions->length(); | |
171 *extensions = ext_funcs; | |
172 return JVMTI_ERROR_NONE; | |
173 } | |
174 | |
175 | |
176 // return the list of extension events | |
177 | |
178 jvmtiError JvmtiExtensions::get_events(JvmtiEnv* env, | |
179 jint* extension_count_ptr, | |
180 jvmtiExtensionEventInfo** extensions) | |
181 { | |
182 guarantee(_ext_events != NULL, "registration not done"); | |
183 | |
184 ResourceTracker rt(env); | |
185 | |
186 jvmtiExtensionEventInfo* ext_events; | |
187 jvmtiError err = rt.allocate(_ext_events->length() * sizeof(jvmtiExtensionEventInfo), | |
188 (unsigned char**)&ext_events); | |
189 if (err != JVMTI_ERROR_NONE) { | |
190 return err; | |
191 } | |
192 | |
193 for (int i=0; i<_ext_events->length(); i++ ) { | |
194 ext_events[i].extension_event_index = _ext_events->at(i)->extension_event_index; | |
195 | |
196 char *id = _ext_events->at(i)->id; | |
197 err = rt.allocate(strlen(id)+1, (unsigned char**)&(ext_events[i].id)); | |
198 if (err != JVMTI_ERROR_NONE) { | |
199 return err; | |
200 } | |
201 strcpy(ext_events[i].id, id); | |
202 | |
203 char *desc = _ext_events->at(i)->short_description; | |
204 err = rt.allocate(strlen(desc)+1, | |
205 (unsigned char**)&(ext_events[i].short_description)); | |
206 if (err != JVMTI_ERROR_NONE) { | |
207 return err; | |
208 } | |
209 strcpy(ext_events[i].short_description, desc); | |
210 | |
211 // params | |
212 | |
213 jint param_count = _ext_events->at(i)->param_count; | |
214 | |
215 ext_events[i].param_count = param_count; | |
216 if (param_count == 0) { | |
217 ext_events[i].params = NULL; | |
218 } else { | |
219 err = rt.allocate(param_count*sizeof(jvmtiParamInfo), | |
220 (unsigned char**)&(ext_events[i].params)); | |
221 if (err != JVMTI_ERROR_NONE) { | |
222 return err; | |
223 } | |
224 jvmtiParamInfo* src_params = _ext_events->at(i)->params; | |
225 jvmtiParamInfo* dst_params = ext_events[i].params; | |
226 | |
227 for (int j=0; j<param_count; j++) { | |
228 err = rt.allocate(strlen(src_params[j].name)+1, | |
229 (unsigned char**)&(dst_params[j].name)); | |
230 if (err != JVMTI_ERROR_NONE) { | |
231 return err; | |
232 } | |
233 strcpy(dst_params[j].name, src_params[j].name); | |
234 | |
235 dst_params[j].kind = src_params[j].kind; | |
236 dst_params[j].base_type = src_params[j].base_type; | |
237 dst_params[j].null_ok = src_params[j].null_ok; | |
238 } | |
239 } | |
240 } | |
241 | |
242 *extension_count_ptr = _ext_events->length(); | |
243 *extensions = ext_events; | |
244 return JVMTI_ERROR_NONE; | |
245 } | |
246 | |
247 // set callback for an extension event and enable/disable it. | |
248 | |
249 jvmtiError JvmtiExtensions::set_event_callback(JvmtiEnv* env, | |
250 jint extension_event_index, | |
251 jvmtiExtensionEvent callback) | |
252 { | |
253 guarantee(_ext_events != NULL, "registration not done"); | |
254 | |
255 jvmtiExtensionEventInfo* event = NULL; | |
256 | |
257 // if there are extension events registered then validate that the | |
258 // extension_event_index matches one of the registered events. | |
259 if (_ext_events != NULL) { | |
260 for (int i=0; i<_ext_events->length(); i++ ) { | |
261 if (_ext_events->at(i)->extension_event_index == extension_event_index) { | |
262 event = _ext_events->at(i); | |
263 break; | |
264 } | |
265 } | |
266 } | |
267 | |
268 // invalid event index | |
269 if (event == NULL) { | |
270 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
271 } | |
272 | |
273 JvmtiEventController::set_extension_event_callback(env, extension_event_index, | |
274 callback); | |
275 | |
276 return JVMTI_ERROR_NONE; | |
277 } |