Tue, 09 Oct 2012 10:09:34 -0700
7197424: update copyright year to match last edit in jdk8 hotspot repository
Summary: Update copyright year to 2012 for relevant files
Reviewed-by: dholmes, coleenp
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_RUNTIME_VM_OPERATIONS_HPP
26 #define SHARE_VM_RUNTIME_VM_OPERATIONS_HPP
28 #include "classfile/javaClasses.hpp"
29 #include "memory/allocation.hpp"
30 #include "oops/oop.hpp"
31 #include "runtime/thread.hpp"
32 #include "utilities/top.hpp"
34 // The following classes are used for operations
35 // initiated by a Java thread but that must
36 // take place in the VMThread.
38 #define VM_OP_ENUM(type) VMOp_##type,
40 // Note: When new VM_XXX comes up, add 'XXX' to the template table.
41 #define VM_OPS_DO(template) \
42 template(Dummy) \
43 template(ThreadStop) \
44 template(ThreadDump) \
45 template(PrintThreads) \
46 template(FindDeadlocks) \
47 template(ForceSafepoint) \
48 template(ForceAsyncSafepoint) \
49 template(Deoptimize) \
50 template(DeoptimizeFrame) \
51 template(DeoptimizeAll) \
52 template(ZombieAll) \
53 template(UnlinkSymbols) \
54 template(HandleFullCodeCache) \
55 template(Verify) \
56 template(PrintJNI) \
57 template(HeapDumper) \
58 template(DeoptimizeTheWorld) \
59 template(CollectForMetadataAllocation) \
60 template(GC_HeapInspection) \
61 template(GenCollectFull) \
62 template(GenCollectFullConcurrent) \
63 template(GenCollectForAllocation) \
64 template(ParallelGCFailedAllocation) \
65 template(ParallelGCSystemGC) \
66 template(CGC_Operation) \
67 template(CMS_Initial_Mark) \
68 template(CMS_Final_Remark) \
69 template(G1CollectFull) \
70 template(G1CollectForAllocation) \
71 template(G1IncCollectionPause) \
72 template(EnableBiasedLocking) \
73 template(RevokeBias) \
74 template(BulkRevokeBias) \
75 template(PopulateDumpSharedSpace) \
76 template(JNIFunctionTableCopier) \
77 template(RedefineClasses) \
78 template(GetOwnedMonitorInfo) \
79 template(GetObjectMonitorUsage) \
80 template(GetCurrentContendedMonitor) \
81 template(GetStackTrace) \
82 template(GetMultipleStackTraces) \
83 template(GetAllStackTraces) \
84 template(GetThreadListStackTraces) \
85 template(GetFrameCount) \
86 template(GetFrameLocation) \
87 template(ChangeBreakpoints) \
88 template(GetOrSetLocal) \
89 template(GetCurrentLocation) \
90 template(EnterInterpOnlyMode) \
91 template(ChangeSingleStep) \
92 template(HeapWalkOperation) \
93 template(HeapIterateOperation) \
94 template(ReportJavaOutOfMemory) \
95 template(JFRCheckpoint) \
96 template(Exit) \
98 class VM_Operation: public CHeapObj<mtInternal> {
99 public:
100 enum Mode {
101 _safepoint, // blocking, safepoint, vm_op C-heap allocated
102 _no_safepoint, // blocking, no safepoint, vm_op C-Heap allocated
103 _concurrent, // non-blocking, no safepoint, vm_op C-Heap allocated
104 _async_safepoint // non-blocking, safepoint, vm_op C-Heap allocated
105 };
107 enum VMOp_Type {
108 VM_OPS_DO(VM_OP_ENUM)
109 VMOp_Terminating
110 };
112 private:
113 Thread* _calling_thread;
114 ThreadPriority _priority;
115 long _timestamp;
116 VM_Operation* _next;
117 VM_Operation* _prev;
119 // The VM operation name array
120 static const char* _names[];
122 public:
123 VM_Operation() { _calling_thread = NULL; _next = NULL; _prev = NULL; }
124 virtual ~VM_Operation() {}
126 // VM operation support (used by VM thread)
127 Thread* calling_thread() const { return _calling_thread; }
128 ThreadPriority priority() { return _priority; }
129 void set_calling_thread(Thread* thread, ThreadPriority priority);
131 long timestamp() const { return _timestamp; }
132 void set_timestamp(long timestamp) { _timestamp = timestamp; }
134 // Called by VM thread - does in turn invoke doit(). Do not override this
135 void evaluate();
137 // evaluate() is called by the VMThread and in turn calls doit().
138 // If the thread invoking VMThread::execute((VM_Operation*) is a JavaThread,
139 // doit_prologue() is called in that thread before transferring control to
140 // the VMThread.
141 // If doit_prologue() returns true the VM operation will proceed, and
142 // doit_epilogue() will be called by the JavaThread once the VM operation
143 // completes. If doit_prologue() returns false the VM operation is cancelled.
144 virtual void doit() = 0;
145 virtual bool doit_prologue() { return true; };
146 virtual void doit_epilogue() {}; // Note: Not called if mode is: _concurrent
148 // Type test
149 virtual bool is_methodCompiler() const { return false; }
151 // Linking
152 VM_Operation *next() const { return _next; }
153 VM_Operation *prev() const { return _prev; }
154 void set_next(VM_Operation *next) { _next = next; }
155 void set_prev(VM_Operation *prev) { _prev = prev; }
157 // Configuration. Override these appropriatly in subclasses.
158 virtual VMOp_Type type() const = 0;
159 virtual Mode evaluation_mode() const { return _safepoint; }
160 virtual bool allow_nested_vm_operations() const { return false; }
161 virtual bool is_cheap_allocated() const { return false; }
162 virtual void oops_do(OopClosure* f) { /* do nothing */ };
164 // CAUTION: <don't hang yourself with following rope>
165 // If you override these methods, make sure that the evaluation
166 // of these methods is race-free and non-blocking, since these
167 // methods may be evaluated either by the mutators or by the
168 // vm thread, either concurrently with mutators or with the mutators
169 // stopped. In other words, taking locks is verboten, and if there
170 // are any races in evaluating the conditions, they'd better be benign.
171 virtual bool evaluate_at_safepoint() const {
172 return evaluation_mode() == _safepoint ||
173 evaluation_mode() == _async_safepoint;
174 }
175 virtual bool evaluate_concurrently() const {
176 return evaluation_mode() == _concurrent ||
177 evaluation_mode() == _async_safepoint;
178 }
180 // Debugging
181 void print_on_error(outputStream* st) const;
182 const char* name() const { return _names[type()]; }
183 static const char* name(int type) {
184 assert(type >= 0 && type < VMOp_Terminating, "invalid VM operation type");
185 return _names[type];
186 }
187 #ifndef PRODUCT
188 void print_on(outputStream* st) const { print_on_error(st); }
189 #endif
190 };
192 class VM_ThreadStop: public VM_Operation {
193 private:
194 oop _thread; // The Thread that the Throwable is thrown against
195 oop _throwable; // The Throwable thrown at the target Thread
196 public:
197 // All oops are passed as JNI handles, since there is no guarantee that a GC might happen before the
198 // VM operation is executed.
199 VM_ThreadStop(oop thread, oop throwable) {
200 _thread = thread;
201 _throwable = throwable;
202 }
203 VMOp_Type type() const { return VMOp_ThreadStop; }
204 oop target_thread() const { return _thread; }
205 oop throwable() const { return _throwable;}
206 void doit();
207 // We deoptimize if top-most frame is compiled - this might require a C2I adapter to be generated
208 bool allow_nested_vm_operations() const { return true; }
209 Mode evaluation_mode() const { return _async_safepoint; }
210 bool is_cheap_allocated() const { return true; }
212 // GC support
213 void oops_do(OopClosure* f) {
214 f->do_oop(&_thread); f->do_oop(&_throwable);
215 }
216 };
218 // dummy vm op, evaluated just to force a safepoint
219 class VM_ForceSafepoint: public VM_Operation {
220 public:
221 VM_ForceSafepoint() {}
222 void doit() {}
223 VMOp_Type type() const { return VMOp_ForceSafepoint; }
224 };
226 // dummy vm op, evaluated just to force a safepoint
227 class VM_ForceAsyncSafepoint: public VM_Operation {
228 public:
229 VM_ForceAsyncSafepoint() {}
230 void doit() {}
231 VMOp_Type type() const { return VMOp_ForceAsyncSafepoint; }
232 Mode evaluation_mode() const { return _async_safepoint; }
233 bool is_cheap_allocated() const { return true; }
234 };
236 class VM_Deoptimize: public VM_Operation {
237 public:
238 VM_Deoptimize() {}
239 VMOp_Type type() const { return VMOp_Deoptimize; }
240 void doit();
241 bool allow_nested_vm_operations() const { return true; }
242 };
245 // Deopt helper that can deoptimize frames in threads other than the
246 // current thread. Only used through Deoptimization::deoptimize_frame.
247 class VM_DeoptimizeFrame: public VM_Operation {
248 friend class Deoptimization;
250 private:
251 JavaThread* _thread;
252 intptr_t* _id;
253 VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id);
255 public:
256 VMOp_Type type() const { return VMOp_DeoptimizeFrame; }
257 void doit();
258 bool allow_nested_vm_operations() const { return true; }
259 };
261 class VM_HandleFullCodeCache: public VM_Operation {
262 private:
263 bool _is_full;
264 public:
265 VM_HandleFullCodeCache(bool is_full) { _is_full = is_full; }
266 VMOp_Type type() const { return VMOp_HandleFullCodeCache; }
267 void doit();
268 bool allow_nested_vm_operations() const { return true; }
269 };
271 #ifndef PRODUCT
272 class VM_DeoptimizeAll: public VM_Operation {
273 private:
274 KlassHandle _dependee;
275 public:
276 VM_DeoptimizeAll() {}
277 VMOp_Type type() const { return VMOp_DeoptimizeAll; }
278 void doit();
279 bool allow_nested_vm_operations() const { return true; }
280 };
283 class VM_ZombieAll: public VM_Operation {
284 public:
285 VM_ZombieAll() {}
286 VMOp_Type type() const { return VMOp_ZombieAll; }
287 void doit();
288 bool allow_nested_vm_operations() const { return true; }
289 };
290 #endif // PRODUCT
292 class VM_UnlinkSymbols: public VM_Operation {
293 public:
294 VM_UnlinkSymbols() {}
295 VMOp_Type type() const { return VMOp_UnlinkSymbols; }
296 void doit();
297 bool allow_nested_vm_operations() const { return true; }
298 };
300 class VM_Verify: public VM_Operation {
301 private:
302 KlassHandle _dependee;
303 public:
304 VM_Verify() {}
305 VMOp_Type type() const { return VMOp_Verify; }
306 void doit();
307 };
310 class VM_PrintThreads: public VM_Operation {
311 private:
312 outputStream* _out;
313 bool _print_concurrent_locks;
314 public:
315 VM_PrintThreads() { _out = tty; _print_concurrent_locks = PrintConcurrentLocks; }
316 VM_PrintThreads(outputStream* out, bool print_concurrent_locks) { _out = out; _print_concurrent_locks = print_concurrent_locks; }
317 VMOp_Type type() const { return VMOp_PrintThreads; }
318 void doit();
319 bool doit_prologue();
320 void doit_epilogue();
321 };
323 class VM_PrintJNI: public VM_Operation {
324 private:
325 outputStream* _out;
326 public:
327 VM_PrintJNI() { _out = tty; }
328 VM_PrintJNI(outputStream* out) { _out = out; }
329 VMOp_Type type() const { return VMOp_PrintJNI; }
330 void doit();
331 };
333 class DeadlockCycle;
334 class VM_FindDeadlocks: public VM_Operation {
335 private:
336 bool _concurrent_locks;
337 DeadlockCycle* _deadlocks;
338 outputStream* _out;
340 public:
341 VM_FindDeadlocks(bool concurrent_locks) : _concurrent_locks(concurrent_locks), _out(NULL), _deadlocks(NULL) {};
342 VM_FindDeadlocks(outputStream* st) : _concurrent_locks(true), _out(st), _deadlocks(NULL) {};
343 ~VM_FindDeadlocks();
345 DeadlockCycle* result() { return _deadlocks; };
346 VMOp_Type type() const { return VMOp_FindDeadlocks; }
347 void doit();
348 bool doit_prologue();
349 };
351 class ThreadDumpResult;
352 class ThreadSnapshot;
353 class ThreadConcurrentLocks;
355 class VM_ThreadDump : public VM_Operation {
356 private:
357 ThreadDumpResult* _result;
358 int _num_threads;
359 GrowableArray<instanceHandle>* _threads;
360 int _max_depth;
361 bool _with_locked_monitors;
362 bool _with_locked_synchronizers;
364 ThreadSnapshot* snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl);
366 public:
367 VM_ThreadDump(ThreadDumpResult* result,
368 int max_depth, // -1 indicates entire stack
369 bool with_locked_monitors,
370 bool with_locked_synchronizers);
372 VM_ThreadDump(ThreadDumpResult* result,
373 GrowableArray<instanceHandle>* threads,
374 int num_threads, // -1 indicates entire stack
375 int max_depth,
376 bool with_locked_monitors,
377 bool with_locked_synchronizers);
379 VMOp_Type type() const { return VMOp_ThreadDump; }
380 void doit();
381 bool doit_prologue();
382 void doit_epilogue();
383 };
386 class VM_Exit: public VM_Operation {
387 private:
388 int _exit_code;
389 static volatile bool _vm_exited;
390 static Thread * _shutdown_thread;
391 static void wait_if_vm_exited();
392 public:
393 VM_Exit(int exit_code) {
394 _exit_code = exit_code;
395 }
396 static int wait_for_threads_in_native_to_block();
397 static int set_vm_exited();
398 static bool vm_exited() { return _vm_exited; }
399 static void block_if_vm_exited() {
400 if (_vm_exited) {
401 wait_if_vm_exited();
402 }
403 }
404 VMOp_Type type() const { return VMOp_Exit; }
405 void doit();
406 };
408 #endif // SHARE_VM_RUNTIME_VM_OPERATIONS_HPP