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comparison src/share/vm/prims/jvmtiImpl.cpp @ 1878:fa83ab460c54

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6988353: refactor contended sync subsystem Summary: reduce complexity by factoring synchronizer.cpp Reviewed-by: dholmes, never, coleenp
author acorn
date Fri, 22 Oct 2010 15:59:34 -0400
parents c18cbe5936b8
children 5caa30ea147b
comparison
equal deleted inserted replaced
1874:75ab0162aa84 1878:fa83ab460c54
23 */ 23 */
24 24
25 # include "incls/_precompiled.incl" 25 # include "incls/_precompiled.incl"
26 # include "incls/_jvmtiImpl.cpp.incl" 26 # include "incls/_jvmtiImpl.cpp.incl"
27 27
28 GrowableArray<JvmtiRawMonitor*> *JvmtiPendingMonitors::_monitors = new (ResourceObj::C_HEAP) GrowableArray<JvmtiRawMonitor*>(1,true);
29
30 void JvmtiPendingMonitors::transition_raw_monitors() {
31 assert((Threads::number_of_threads()==1),
32 "Java thread has not created yet or more than one java thread \
33 is running. Raw monitor transition will not work");
34 JavaThread *current_java_thread = JavaThread::current();
35 assert(current_java_thread->thread_state() == _thread_in_vm, "Must be in vm");
36 {
37 ThreadBlockInVM __tbivm(current_java_thread);
38 for(int i=0; i< count(); i++) {
39 JvmtiRawMonitor *rmonitor = monitors()->at(i);
40 int r = rmonitor->raw_enter(current_java_thread);
41 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
42 }
43 }
44 // pending monitors are converted to real monitor so delete them all.
45 dispose();
46 }
47
48 // 28 //
49 // class JvmtiAgentThread 29 // class JvmtiAgentThread
50 // 30 //
51 // JavaThread used to wrap a thread started by an agent 31 // JavaThread used to wrap a thread started by an agent
52 // using the JVMTI method RunAgentThread. 32 // using the JVMTI method RunAgentThread.
213 // recompute the new cache value after GC 193 // recompute the new cache value after GC
214 for (int i=0; i<len; i++) { 194 for (int i=0; i<len; i++) {
215 _cache[i] = _elements->at(i)->getCacheValue(); 195 _cache[i] = _elements->at(i)->getCacheValue();
216 } 196 }
217 } 197 }
218
219
220 //
221 // class JvmtiRawMonitor
222 //
223
224 JvmtiRawMonitor::JvmtiRawMonitor(const char *name) {
225 #ifdef ASSERT
226 _name = strcpy(NEW_C_HEAP_ARRAY(char, strlen(name) + 1), name);
227 #else
228 _name = NULL;
229 #endif
230 _magic = JVMTI_RM_MAGIC;
231 }
232
233 JvmtiRawMonitor::~JvmtiRawMonitor() {
234 #ifdef ASSERT
235 FreeHeap(_name);
236 #endif
237 _magic = 0;
238 }
239
240
241 bool
242 JvmtiRawMonitor::is_valid() {
243 int value = 0;
244
245 // This object might not be a JvmtiRawMonitor so we can't assume
246 // the _magic field is properly aligned. Get the value in a safe
247 // way and then check against JVMTI_RM_MAGIC.
248
249 switch (sizeof(_magic)) {
250 case 2:
251 value = Bytes::get_native_u2((address)&_magic);
252 break;
253
254 case 4:
255 value = Bytes::get_native_u4((address)&_magic);
256 break;
257
258 case 8:
259 value = Bytes::get_native_u8((address)&_magic);
260 break;
261
262 default:
263 guarantee(false, "_magic field is an unexpected size");
264 }
265
266 return value == JVMTI_RM_MAGIC;
267 }
268
269 198
270 // 199 //
271 // class JvmtiBreakpoint 200 // class JvmtiBreakpoint
272 // 201 //
273 202