1
|
1 |
/*
|
|
2 |
* Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
|
|
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 |
*
|
|
19 |
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
20 |
* CA 95054 USA or visit www.sun.com if you need additional information or
|
|
21 |
* have any questions.
|
|
22 |
*
|
|
23 |
*/
|
|
24 |
|
|
25 |
// The following classes are used for operations
|
|
26 |
// initiated by a Java thread but that must
|
|
27 |
// take place in the VMThread.
|
|
28 |
|
|
29 |
#define VM_OP_ENUM(type) VMOp_##type,
|
|
30 |
|
|
31 |
// Note: When new VM_XXX comes up, add 'XXX' to the template table.
|
|
32 |
#define VM_OPS_DO(template) \
|
|
33 |
template(Dummy) \
|
|
34 |
template(ThreadStop) \
|
|
35 |
template(ThreadDump) \
|
|
36 |
template(PrintThreads) \
|
|
37 |
template(FindDeadlocks) \
|
|
38 |
template(ForceSafepoint) \
|
|
39 |
template(ForceAsyncSafepoint) \
|
|
40 |
template(Deoptimize) \
|
|
41 |
template(DeoptimizeFrame) \
|
|
42 |
template(DeoptimizeAll) \
|
|
43 |
template(ZombieAll) \
|
|
44 |
template(Verify) \
|
|
45 |
template(PrintJNI) \
|
|
46 |
template(HeapDumper) \
|
|
47 |
template(DeoptimizeTheWorld) \
|
|
48 |
template(GC_HeapInspection) \
|
|
49 |
template(GenCollectFull) \
|
|
50 |
template(GenCollectFullConcurrent) \
|
|
51 |
template(GenCollectForAllocation) \
|
|
52 |
template(ParallelGCFailedAllocation) \
|
|
53 |
template(ParallelGCFailedPermanentAllocation) \
|
|
54 |
template(ParallelGCSystemGC) \
|
|
55 |
template(CMS_Initial_Mark) \
|
|
56 |
template(CMS_Final_Remark) \
|
|
57 |
template(EnableBiasedLocking) \
|
|
58 |
template(RevokeBias) \
|
|
59 |
template(BulkRevokeBias) \
|
|
60 |
template(PopulateDumpSharedSpace) \
|
|
61 |
template(JNIFunctionTableCopier) \
|
|
62 |
template(RedefineClasses) \
|
|
63 |
template(GetOwnedMonitorInfo) \
|
|
64 |
template(GetObjectMonitorUsage) \
|
|
65 |
template(GetCurrentContendedMonitor) \
|
|
66 |
template(GetStackTrace) \
|
|
67 |
template(GetMultipleStackTraces) \
|
|
68 |
template(GetAllStackTraces) \
|
|
69 |
template(GetThreadListStackTraces) \
|
|
70 |
template(GetFrameCount) \
|
|
71 |
template(GetFrameLocation) \
|
|
72 |
template(ChangeBreakpoints) \
|
|
73 |
template(GetOrSetLocal) \
|
|
74 |
template(GetCurrentLocation) \
|
|
75 |
template(EnterInterpOnlyMode) \
|
|
76 |
template(ChangeSingleStep) \
|
|
77 |
template(HeapWalkOperation) \
|
|
78 |
template(HeapIterateOperation) \
|
|
79 |
template(ReportJavaOutOfMemory) \
|
|
80 |
template(Exit) \
|
|
81 |
|
|
82 |
class VM_Operation: public CHeapObj {
|
|
83 |
public:
|
|
84 |
enum Mode {
|
|
85 |
_safepoint, // blocking, safepoint, vm_op C-heap allocated
|
|
86 |
_no_safepoint, // blocking, no safepoint, vm_op C-Heap allocated
|
|
87 |
_concurrent, // non-blocking, no safepoint, vm_op C-Heap allocated
|
|
88 |
_async_safepoint // non-blocking, safepoint, vm_op C-Heap allocated
|
|
89 |
};
|
|
90 |
|
|
91 |
enum VMOp_Type {
|
|
92 |
VM_OPS_DO(VM_OP_ENUM)
|
|
93 |
VMOp_Terminating
|
|
94 |
};
|
|
95 |
|
|
96 |
private:
|
|
97 |
Thread* _calling_thread;
|
|
98 |
ThreadPriority _priority;
|
|
99 |
long _timestamp;
|
|
100 |
VM_Operation* _next;
|
|
101 |
VM_Operation* _prev;
|
|
102 |
|
|
103 |
// The VM operation name array
|
|
104 |
static const char* _names[];
|
|
105 |
|
|
106 |
public:
|
|
107 |
VM_Operation() { _calling_thread = NULL; _next = NULL; _prev = NULL; }
|
|
108 |
virtual ~VM_Operation() {}
|
|
109 |
|
|
110 |
// VM operation support (used by VM thread)
|
|
111 |
Thread* calling_thread() const { return _calling_thread; }
|
|
112 |
ThreadPriority priority() { return _priority; }
|
|
113 |
void set_calling_thread(Thread* thread, ThreadPriority priority);
|
|
114 |
|
|
115 |
long timestamp() const { return _timestamp; }
|
|
116 |
void set_timestamp(long timestamp) { _timestamp = timestamp; }
|
|
117 |
|
|
118 |
// Called by VM thread - does in turn invoke doit(). Do not override this
|
|
119 |
void evaluate();
|
|
120 |
|
|
121 |
// evaluate() is called by the VMThread and in turn calls doit().
|
|
122 |
// If the thread invoking VMThread::execute((VM_Operation*) is a JavaThread,
|
|
123 |
// doit_prologue() is called in that thread before transferring control to
|
|
124 |
// the VMThread.
|
|
125 |
// If doit_prologue() returns true the VM operation will proceed, and
|
|
126 |
// doit_epilogue() will be called by the JavaThread once the VM operation
|
|
127 |
// completes. If doit_prologue() returns false the VM operation is cancelled.
|
|
128 |
virtual void doit() = 0;
|
|
129 |
virtual bool doit_prologue() { return true; };
|
|
130 |
virtual void doit_epilogue() {}; // Note: Not called if mode is: _concurrent
|
|
131 |
|
|
132 |
// Type test
|
|
133 |
virtual bool is_methodCompiler() const { return false; }
|
|
134 |
|
|
135 |
// Linking
|
|
136 |
VM_Operation *next() const { return _next; }
|
|
137 |
VM_Operation *prev() const { return _prev; }
|
|
138 |
void set_next(VM_Operation *next) { _next = next; }
|
|
139 |
void set_prev(VM_Operation *prev) { _prev = prev; }
|
|
140 |
|
|
141 |
// Configuration. Override these appropriatly in subclasses.
|
|
142 |
virtual VMOp_Type type() const = 0;
|
|
143 |
virtual Mode evaluation_mode() const { return _safepoint; }
|
|
144 |
virtual bool allow_nested_vm_operations() const { return false; }
|
|
145 |
virtual bool is_cheap_allocated() const { return false; }
|
|
146 |
virtual void oops_do(OopClosure* f) { /* do nothing */ };
|
|
147 |
|
|
148 |
// CAUTION: <don't hang yourself with following rope>
|
|
149 |
// If you override these methods, make sure that the evaluation
|
|
150 |
// of these methods is race-free and non-blocking, since these
|
|
151 |
// methods may be evaluated either by the mutators or by the
|
|
152 |
// vm thread, either concurrently with mutators or with the mutators
|
|
153 |
// stopped. In other words, taking locks is verboten, and if there
|
|
154 |
// are any races in evaluating the conditions, they'd better be benign.
|
|
155 |
virtual bool evaluate_at_safepoint() const {
|
|
156 |
return evaluation_mode() == _safepoint ||
|
|
157 |
evaluation_mode() == _async_safepoint;
|
|
158 |
}
|
|
159 |
virtual bool evaluate_concurrently() const {
|
|
160 |
return evaluation_mode() == _concurrent ||
|
|
161 |
evaluation_mode() == _async_safepoint;
|
|
162 |
}
|
|
163 |
|
|
164 |
// Debugging
|
|
165 |
void print_on_error(outputStream* st) const;
|
|
166 |
const char* name() const { return _names[type()]; }
|
|
167 |
static const char* name(int type) {
|
|
168 |
assert(type >= 0 && type < VMOp_Terminating, "invalid VM operation type");
|
|
169 |
return _names[type];
|
|
170 |
}
|
|
171 |
#ifndef PRODUCT
|
|
172 |
void print_on(outputStream* st) const { print_on_error(st); }
|
|
173 |
#endif
|
|
174 |
};
|
|
175 |
|
|
176 |
class VM_ThreadStop: public VM_Operation {
|
|
177 |
private:
|
|
178 |
oop _thread; // The Thread that the Throwable is thrown against
|
|
179 |
oop _throwable; // The Throwable thrown at the target Thread
|
|
180 |
public:
|
|
181 |
// All oops are passed as JNI handles, since there is no guarantee that a GC might happen before the
|
|
182 |
// VM operation is executed.
|
|
183 |
VM_ThreadStop(oop thread, oop throwable) {
|
|
184 |
_thread = thread;
|
|
185 |
_throwable = throwable;
|
|
186 |
}
|
|
187 |
VMOp_Type type() const { return VMOp_ThreadStop; }
|
|
188 |
oop target_thread() const { return _thread; }
|
|
189 |
oop throwable() const { return _throwable;}
|
|
190 |
void doit();
|
|
191 |
// We deoptimize if top-most frame is compiled - this might require a C2I adapter to be generated
|
|
192 |
bool allow_nested_vm_operations() const { return true; }
|
|
193 |
Mode evaluation_mode() const { return _async_safepoint; }
|
|
194 |
bool is_cheap_allocated() const { return true; }
|
|
195 |
|
|
196 |
// GC support
|
|
197 |
void oops_do(OopClosure* f) {
|
|
198 |
f->do_oop(&_thread); f->do_oop(&_throwable);
|
|
199 |
}
|
|
200 |
};
|
|
201 |
|
|
202 |
// dummy vm op, evaluated just to force a safepoint
|
|
203 |
class VM_ForceSafepoint: public VM_Operation {
|
|
204 |
public:
|
|
205 |
VM_ForceSafepoint() {}
|
|
206 |
void doit() {}
|
|
207 |
VMOp_Type type() const { return VMOp_ForceSafepoint; }
|
|
208 |
};
|
|
209 |
|
|
210 |
// dummy vm op, evaluated just to force a safepoint
|
|
211 |
class VM_ForceAsyncSafepoint: public VM_Operation {
|
|
212 |
public:
|
|
213 |
VM_ForceAsyncSafepoint() {}
|
|
214 |
void doit() {}
|
|
215 |
VMOp_Type type() const { return VMOp_ForceAsyncSafepoint; }
|
|
216 |
Mode evaluation_mode() const { return _async_safepoint; }
|
|
217 |
bool is_cheap_allocated() const { return true; }
|
|
218 |
};
|
|
219 |
|
|
220 |
class VM_Deoptimize: public VM_Operation {
|
|
221 |
public:
|
|
222 |
VM_Deoptimize() {}
|
|
223 |
VMOp_Type type() const { return VMOp_Deoptimize; }
|
|
224 |
void doit();
|
|
225 |
bool allow_nested_vm_operations() const { return true; }
|
|
226 |
};
|
|
227 |
|
|
228 |
class VM_DeoptimizeFrame: public VM_Operation {
|
|
229 |
private:
|
|
230 |
JavaThread* _thread;
|
|
231 |
intptr_t* _id;
|
|
232 |
public:
|
|
233 |
VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id);
|
|
234 |
VMOp_Type type() const { return VMOp_DeoptimizeFrame; }
|
|
235 |
void doit();
|
|
236 |
bool allow_nested_vm_operations() const { return true; }
|
|
237 |
};
|
|
238 |
|
|
239 |
#ifndef PRODUCT
|
|
240 |
class VM_DeoptimizeAll: public VM_Operation {
|
|
241 |
private:
|
|
242 |
KlassHandle _dependee;
|
|
243 |
public:
|
|
244 |
VM_DeoptimizeAll() {}
|
|
245 |
VMOp_Type type() const { return VMOp_DeoptimizeAll; }
|
|
246 |
void doit();
|
|
247 |
bool allow_nested_vm_operations() const { return true; }
|
|
248 |
};
|
|
249 |
|
|
250 |
|
|
251 |
class VM_ZombieAll: public VM_Operation {
|
|
252 |
public:
|
|
253 |
VM_ZombieAll() {}
|
|
254 |
VMOp_Type type() const { return VMOp_ZombieAll; }
|
|
255 |
void doit();
|
|
256 |
bool allow_nested_vm_operations() const { return true; }
|
|
257 |
};
|
|
258 |
#endif // PRODUCT
|
|
259 |
|
|
260 |
class VM_Verify: public VM_Operation {
|
|
261 |
private:
|
|
262 |
KlassHandle _dependee;
|
|
263 |
public:
|
|
264 |
VM_Verify() {}
|
|
265 |
VMOp_Type type() const { return VMOp_Verify; }
|
|
266 |
void doit();
|
|
267 |
};
|
|
268 |
|
|
269 |
|
|
270 |
class VM_PrintThreads: public VM_Operation {
|
|
271 |
private:
|
|
272 |
outputStream* _out;
|
|
273 |
bool _print_concurrent_locks;
|
|
274 |
public:
|
|
275 |
VM_PrintThreads() { _out = tty; _print_concurrent_locks = PrintConcurrentLocks; }
|
|
276 |
VM_PrintThreads(outputStream* out, bool print_concurrent_locks) { _out = out; _print_concurrent_locks = print_concurrent_locks; }
|
|
277 |
VMOp_Type type() const { return VMOp_PrintThreads; }
|
|
278 |
void doit();
|
|
279 |
bool doit_prologue();
|
|
280 |
void doit_epilogue();
|
|
281 |
};
|
|
282 |
|
|
283 |
class VM_PrintJNI: public VM_Operation {
|
|
284 |
private:
|
|
285 |
outputStream* _out;
|
|
286 |
public:
|
|
287 |
VM_PrintJNI() { _out = tty; }
|
|
288 |
VM_PrintJNI(outputStream* out) { _out = out; }
|
|
289 |
VMOp_Type type() const { return VMOp_PrintJNI; }
|
|
290 |
void doit();
|
|
291 |
};
|
|
292 |
|
|
293 |
class DeadlockCycle;
|
|
294 |
class VM_FindDeadlocks: public VM_Operation {
|
|
295 |
private:
|
|
296 |
bool _concurrent_locks;
|
|
297 |
DeadlockCycle* _deadlocks;
|
|
298 |
outputStream* _out;
|
|
299 |
|
|
300 |
public:
|
|
301 |
VM_FindDeadlocks(bool concurrent_locks) : _concurrent_locks(concurrent_locks), _out(NULL), _deadlocks(NULL) {};
|
|
302 |
VM_FindDeadlocks(outputStream* st) : _concurrent_locks(true), _out(st), _deadlocks(NULL) {};
|
|
303 |
~VM_FindDeadlocks();
|
|
304 |
|
|
305 |
DeadlockCycle* result() { return _deadlocks; };
|
|
306 |
VMOp_Type type() const { return VMOp_FindDeadlocks; }
|
|
307 |
void doit();
|
|
308 |
bool doit_prologue();
|
|
309 |
};
|
|
310 |
|
|
311 |
class ThreadDumpResult;
|
|
312 |
class ThreadSnapshot;
|
|
313 |
class ThreadConcurrentLocks;
|
|
314 |
|
|
315 |
class VM_ThreadDump : public VM_Operation {
|
|
316 |
private:
|
|
317 |
ThreadDumpResult* _result;
|
|
318 |
int _num_threads;
|
|
319 |
GrowableArray<instanceHandle>* _threads;
|
|
320 |
int _max_depth;
|
|
321 |
bool _with_locked_monitors;
|
|
322 |
bool _with_locked_synchronizers;
|
|
323 |
|
|
324 |
ThreadSnapshot* snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl);
|
|
325 |
|
|
326 |
public:
|
|
327 |
VM_ThreadDump(ThreadDumpResult* result,
|
|
328 |
int max_depth, // -1 indicates entire stack
|
|
329 |
bool with_locked_monitors,
|
|
330 |
bool with_locked_synchronizers);
|
|
331 |
|
|
332 |
VM_ThreadDump(ThreadDumpResult* result,
|
|
333 |
GrowableArray<instanceHandle>* threads,
|
|
334 |
int num_threads, // -1 indicates entire stack
|
|
335 |
int max_depth,
|
|
336 |
bool with_locked_monitors,
|
|
337 |
bool with_locked_synchronizers);
|
|
338 |
|
|
339 |
VMOp_Type type() const { return VMOp_ThreadDump; }
|
|
340 |
void doit();
|
|
341 |
bool doit_prologue();
|
|
342 |
void doit_epilogue();
|
|
343 |
};
|
|
344 |
|
|
345 |
|
|
346 |
class VM_Exit: public VM_Operation {
|
|
347 |
private:
|
|
348 |
int _exit_code;
|
|
349 |
static volatile bool _vm_exited;
|
|
350 |
static Thread * _shutdown_thread;
|
|
351 |
static void wait_if_vm_exited();
|
|
352 |
public:
|
|
353 |
VM_Exit(int exit_code) {
|
|
354 |
_exit_code = exit_code;
|
|
355 |
}
|
|
356 |
static int wait_for_threads_in_native_to_block();
|
|
357 |
static int set_vm_exited();
|
|
358 |
static bool vm_exited() { return _vm_exited; }
|
|
359 |
static void block_if_vm_exited() {
|
|
360 |
if (_vm_exited) {
|
|
361 |
wait_if_vm_exited();
|
|
362 |
}
|
|
363 |
}
|
|
364 |
VMOp_Type type() const { return VMOp_Exit; }
|
|
365 |
void doit();
|
|
366 |
};
|