Tue, 24 Dec 2013 11:48:39 -0800
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov
1 /*
2 * Copyright (c) 1997, 2013, 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(Verify) \
55 template(PrintJNI) \
56 template(HeapDumper) \
57 template(DeoptimizeTheWorld) \
58 template(CollectForMetadataAllocation) \
59 template(GC_HeapInspection) \
60 template(GenCollectFull) \
61 template(GenCollectFullConcurrent) \
62 template(GenCollectForAllocation) \
63 template(ParallelGCFailedAllocation) \
64 template(ParallelGCSystemGC) \
65 template(CGC_Operation) \
66 template(CMS_Initial_Mark) \
67 template(CMS_Final_Remark) \
68 template(G1CollectFull) \
69 template(G1CollectForAllocation) \
70 template(G1IncCollectionPause) \
71 template(EnableBiasedLocking) \
72 template(RevokeBias) \
73 template(BulkRevokeBias) \
74 template(PopulateDumpSharedSpace) \
75 template(JNIFunctionTableCopier) \
76 template(RedefineClasses) \
77 template(GetOwnedMonitorInfo) \
78 template(GetObjectMonitorUsage) \
79 template(GetCurrentContendedMonitor) \
80 template(GetStackTrace) \
81 template(GetMultipleStackTraces) \
82 template(GetAllStackTraces) \
83 template(GetThreadListStackTraces) \
84 template(GetFrameCount) \
85 template(GetFrameLocation) \
86 template(ChangeBreakpoints) \
87 template(GetOrSetLocal) \
88 template(GetCurrentLocation) \
89 template(EnterInterpOnlyMode) \
90 template(ChangeSingleStep) \
91 template(HeapWalkOperation) \
92 template(HeapIterateOperation) \
93 template(ReportJavaOutOfMemory) \
94 template(JFRCheckpoint) \
95 template(Exit) \
96 template(LinuxDllLoad) \
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 static const char* mode_to_string(Mode mode);
182 // Debugging
183 void print_on_error(outputStream* st) const;
184 const char* name() const { return _names[type()]; }
185 static const char* name(int type) {
186 assert(type >= 0 && type < VMOp_Terminating, "invalid VM operation type");
187 return _names[type];
188 }
189 #ifndef PRODUCT
190 void print_on(outputStream* st) const { print_on_error(st); }
191 #endif
192 };
194 class VM_ThreadStop: public VM_Operation {
195 private:
196 oop _thread; // The Thread that the Throwable is thrown against
197 oop _throwable; // The Throwable thrown at the target Thread
198 public:
199 // All oops are passed as JNI handles, since there is no guarantee that a GC might happen before the
200 // VM operation is executed.
201 VM_ThreadStop(oop thread, oop throwable) {
202 _thread = thread;
203 _throwable = throwable;
204 }
205 VMOp_Type type() const { return VMOp_ThreadStop; }
206 oop target_thread() const { return _thread; }
207 oop throwable() const { return _throwable;}
208 void doit();
209 // We deoptimize if top-most frame is compiled - this might require a C2I adapter to be generated
210 bool allow_nested_vm_operations() const { return true; }
211 Mode evaluation_mode() const { return _async_safepoint; }
212 bool is_cheap_allocated() const { return true; }
214 // GC support
215 void oops_do(OopClosure* f) {
216 f->do_oop(&_thread); f->do_oop(&_throwable);
217 }
218 };
220 // dummy vm op, evaluated just to force a safepoint
221 class VM_ForceSafepoint: public VM_Operation {
222 public:
223 VM_ForceSafepoint() {}
224 void doit() {}
225 VMOp_Type type() const { return VMOp_ForceSafepoint; }
226 };
228 // dummy vm op, evaluated just to force a safepoint
229 class VM_ForceAsyncSafepoint: public VM_Operation {
230 public:
231 VM_ForceAsyncSafepoint() {}
232 void doit() {}
233 VMOp_Type type() const { return VMOp_ForceAsyncSafepoint; }
234 Mode evaluation_mode() const { return _async_safepoint; }
235 bool is_cheap_allocated() const { return true; }
236 };
238 class VM_Deoptimize: public VM_Operation {
239 public:
240 VM_Deoptimize() {}
241 VMOp_Type type() const { return VMOp_Deoptimize; }
242 void doit();
243 bool allow_nested_vm_operations() const { return true; }
244 };
247 // Deopt helper that can deoptimize frames in threads other than the
248 // current thread. Only used through Deoptimization::deoptimize_frame.
249 class VM_DeoptimizeFrame: public VM_Operation {
250 friend class Deoptimization;
252 private:
253 JavaThread* _thread;
254 intptr_t* _id;
255 VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id);
257 public:
258 VMOp_Type type() const { return VMOp_DeoptimizeFrame; }
259 void doit();
260 bool allow_nested_vm_operations() const { return true; }
261 };
263 #ifndef PRODUCT
264 class VM_DeoptimizeAll: public VM_Operation {
265 private:
266 KlassHandle _dependee;
267 public:
268 VM_DeoptimizeAll() {}
269 VMOp_Type type() const { return VMOp_DeoptimizeAll; }
270 void doit();
271 bool allow_nested_vm_operations() const { return true; }
272 };
275 class VM_ZombieAll: public VM_Operation {
276 public:
277 VM_ZombieAll() {}
278 VMOp_Type type() const { return VMOp_ZombieAll; }
279 void doit();
280 bool allow_nested_vm_operations() const { return true; }
281 };
282 #endif // PRODUCT
284 class VM_UnlinkSymbols: public VM_Operation {
285 public:
286 VM_UnlinkSymbols() {}
287 VMOp_Type type() const { return VMOp_UnlinkSymbols; }
288 void doit();
289 bool allow_nested_vm_operations() const { return true; }
290 };
292 class VM_Verify: public VM_Operation {
293 private:
294 bool _silent;
295 public:
296 VM_Verify(bool silent = VerifySilently) : _silent(silent) {}
297 VMOp_Type type() const { return VMOp_Verify; }
298 void doit();
299 };
302 class VM_PrintThreads: public VM_Operation {
303 private:
304 outputStream* _out;
305 bool _print_concurrent_locks;
306 public:
307 VM_PrintThreads() { _out = tty; _print_concurrent_locks = PrintConcurrentLocks; }
308 VM_PrintThreads(outputStream* out, bool print_concurrent_locks) { _out = out; _print_concurrent_locks = print_concurrent_locks; }
309 VMOp_Type type() const { return VMOp_PrintThreads; }
310 void doit();
311 bool doit_prologue();
312 void doit_epilogue();
313 };
315 class VM_PrintJNI: public VM_Operation {
316 private:
317 outputStream* _out;
318 public:
319 VM_PrintJNI() { _out = tty; }
320 VM_PrintJNI(outputStream* out) { _out = out; }
321 VMOp_Type type() const { return VMOp_PrintJNI; }
322 void doit();
323 };
325 class DeadlockCycle;
326 class VM_FindDeadlocks: public VM_Operation {
327 private:
328 bool _concurrent_locks;
329 DeadlockCycle* _deadlocks;
330 outputStream* _out;
332 public:
333 VM_FindDeadlocks(bool concurrent_locks) : _concurrent_locks(concurrent_locks), _out(NULL), _deadlocks(NULL) {};
334 VM_FindDeadlocks(outputStream* st) : _concurrent_locks(true), _out(st), _deadlocks(NULL) {};
335 ~VM_FindDeadlocks();
337 DeadlockCycle* result() { return _deadlocks; };
338 VMOp_Type type() const { return VMOp_FindDeadlocks; }
339 void doit();
340 bool doit_prologue();
341 };
343 class ThreadDumpResult;
344 class ThreadSnapshot;
345 class ThreadConcurrentLocks;
347 class VM_ThreadDump : public VM_Operation {
348 private:
349 ThreadDumpResult* _result;
350 int _num_threads;
351 GrowableArray<instanceHandle>* _threads;
352 int _max_depth;
353 bool _with_locked_monitors;
354 bool _with_locked_synchronizers;
356 ThreadSnapshot* snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl);
358 public:
359 VM_ThreadDump(ThreadDumpResult* result,
360 int max_depth, // -1 indicates entire stack
361 bool with_locked_monitors,
362 bool with_locked_synchronizers);
364 VM_ThreadDump(ThreadDumpResult* result,
365 GrowableArray<instanceHandle>* threads,
366 int num_threads, // -1 indicates entire stack
367 int max_depth,
368 bool with_locked_monitors,
369 bool with_locked_synchronizers);
371 VMOp_Type type() const { return VMOp_ThreadDump; }
372 void doit();
373 bool doit_prologue();
374 void doit_epilogue();
375 };
378 class VM_Exit: public VM_Operation {
379 private:
380 int _exit_code;
381 static volatile bool _vm_exited;
382 static Thread * _shutdown_thread;
383 static void wait_if_vm_exited();
384 public:
385 VM_Exit(int exit_code) {
386 _exit_code = exit_code;
387 }
388 static int wait_for_threads_in_native_to_block();
389 static int set_vm_exited();
390 static bool vm_exited() { return _vm_exited; }
391 static void block_if_vm_exited() {
392 if (_vm_exited) {
393 wait_if_vm_exited();
394 }
395 }
396 VMOp_Type type() const { return VMOp_Exit; }
397 void doit();
398 };
400 #endif // SHARE_VM_RUNTIME_VM_OPERATIONS_HPP