Mercurial > hg > truffle
annotate src/share/vm/runtime/thread.hpp @ 6275:957c266d8bc5
Merge with http://hg.openjdk.java.net/hsx/hsx24/hotspot/
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 21 Aug 2012 10:39:19 +0200 |
parents | 120820e30baa d2a62e0f25eb |
children | e522a00b91aa |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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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 | |
1972 | 25 #ifndef SHARE_VM_RUNTIME_THREAD_HPP |
26 #define SHARE_VM_RUNTIME_THREAD_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "memory/threadLocalAllocBuffer.hpp" | |
30 #include "oops/oop.hpp" | |
31 #include "prims/jni.h" | |
32 #include "prims/jvmtiExport.hpp" | |
33 #include "runtime/frame.hpp" | |
34 #include "runtime/javaFrameAnchor.hpp" | |
35 #include "runtime/jniHandles.hpp" | |
36 #include "runtime/mutexLocker.hpp" | |
37 #include "runtime/os.hpp" | |
38 #include "runtime/osThread.hpp" | |
39 #include "runtime/park.hpp" | |
40 #include "runtime/safepoint.hpp" | |
41 #include "runtime/stubRoutines.hpp" | |
42 #include "runtime/threadLocalStorage.hpp" | |
43 #include "runtime/unhandledOops.hpp" | |
6197 | 44 #include "services/memRecorder.hpp" |
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45 #include "trace/tracing.hpp" |
1972 | 46 #include "utilities/exceptions.hpp" |
47 #include "utilities/top.hpp" | |
48 #ifndef SERIALGC | |
49 #include "gc_implementation/g1/dirtyCardQueue.hpp" | |
50 #include "gc_implementation/g1/satbQueue.hpp" | |
51 #endif | |
52 #ifdef ZERO | |
53 #ifdef TARGET_ARCH_zero | |
54 # include "stack_zero.hpp" | |
55 #endif | |
56 #endif | |
57 | |
0 | 58 class ThreadSafepointState; |
59 class ThreadProfiler; | |
60 | |
61 class JvmtiThreadState; | |
62 class JvmtiGetLoadedClassesClosure; | |
63 class ThreadStatistics; | |
64 class ConcurrentLocksDump; | |
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65 class ParkEvent; |
1878 | 66 class Parker; |
0 | 67 |
68 class ciEnv; | |
69 class CompileThread; | |
70 class CompileLog; | |
71 class CompileTask; | |
72 class CompileQueue; | |
73 class CompilerCounters; | |
74 class vframeArray; | |
75 | |
76 class DeoptResourceMark; | |
77 class jvmtiDeferredLocalVariableSet; | |
78 | |
79 class GCTaskQueue; | |
80 class ThreadClosure; | |
81 class IdealGraphPrinter; | |
82 | |
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83 class WorkerThread; |
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84 |
0 | 85 // Class hierarchy |
86 // - Thread | |
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87 // - NamedThread |
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88 // - VMThread |
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89 // - ConcurrentGCThread |
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90 // - WorkerThread |
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91 // - GangWorker |
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92 // - GCTaskThread |
0 | 93 // - JavaThread |
94 // - WatcherThread | |
95 | |
96 class Thread: public ThreadShadow { | |
97 friend class VMStructs; | |
98 private: | |
99 // Exception handling | |
100 // (Note: _pending_exception and friends are in ThreadShadow) | |
101 //oop _pending_exception; // pending exception for current thread | |
102 // const char* _exception_file; // file information for exception (debugging only) | |
103 // int _exception_line; // line information for exception (debugging only) | |
6197 | 104 protected: |
0 | 105 // Support for forcing alignment of thread objects for biased locking |
106 void* _real_malloc_address; | |
107 public: | |
6197 | 108 void* operator new(size_t size) { return allocate(size, true); } |
109 void* operator new(size_t size, std::nothrow_t& nothrow_constant) { return allocate(size, false); } | |
0 | 110 void operator delete(void* p); |
6197 | 111 |
112 protected: | |
113 static void* allocate(size_t size, bool throw_excpt, MEMFLAGS flags = mtThread); | |
0 | 114 private: |
115 | |
116 // *************************************************************** | |
117 // Suspend and resume support | |
118 // *************************************************************** | |
119 // | |
120 // VM suspend/resume no longer exists - it was once used for various | |
121 // things including safepoints but was deprecated and finally removed | |
122 // in Java 7. Because VM suspension was considered "internal" Java-level | |
123 // suspension was considered "external", and this legacy naming scheme | |
124 // remains. | |
125 // | |
126 // External suspend/resume requests come from JVM_SuspendThread, | |
127 // JVM_ResumeThread, JVMTI SuspendThread, and finally JVMTI | |
128 // ResumeThread. External | |
129 // suspend requests cause _external_suspend to be set and external | |
130 // resume requests cause _external_suspend to be cleared. | |
131 // External suspend requests do not nest on top of other external | |
132 // suspend requests. The higher level APIs reject suspend requests | |
133 // for already suspended threads. | |
134 // | |
135 // The external_suspend | |
136 // flag is checked by has_special_runtime_exit_condition() and java thread | |
137 // will self-suspend when handle_special_runtime_exit_condition() is | |
138 // called. Most uses of the _thread_blocked state in JavaThreads are | |
139 // considered the same as being externally suspended; if the blocking | |
140 // condition lifts, the JavaThread will self-suspend. Other places | |
141 // where VM checks for external_suspend include: | |
142 // + mutex granting (do not enter monitors when thread is suspended) | |
143 // + state transitions from _thread_in_native | |
144 // | |
145 // In general, java_suspend() does not wait for an external suspend | |
146 // request to complete. When it returns, the only guarantee is that | |
147 // the _external_suspend field is true. | |
148 // | |
149 // wait_for_ext_suspend_completion() is used to wait for an external | |
150 // suspend request to complete. External suspend requests are usually | |
151 // followed by some other interface call that requires the thread to | |
152 // be quiescent, e.g., GetCallTrace(). By moving the "wait time" into | |
153 // the interface that requires quiescence, we give the JavaThread a | |
154 // chance to self-suspend before we need it to be quiescent. This | |
155 // improves overall suspend/query performance. | |
156 // | |
157 // _suspend_flags controls the behavior of java_ suspend/resume. | |
158 // It must be set under the protection of SR_lock. Read from the flag is | |
159 // OK without SR_lock as long as the value is only used as a hint. | |
160 // (e.g., check _external_suspend first without lock and then recheck | |
161 // inside SR_lock and finish the suspension) | |
162 // | |
163 // _suspend_flags is also overloaded for other "special conditions" so | |
164 // that a single check indicates whether any special action is needed | |
165 // eg. for async exceptions. | |
166 // ------------------------------------------------------------------- | |
167 // Notes: | |
168 // 1. The suspend/resume logic no longer uses ThreadState in OSThread | |
169 // but we still update its value to keep other part of the system (mainly | |
170 // JVMTI) happy. ThreadState is legacy code (see notes in | |
171 // osThread.hpp). | |
172 // | |
173 // 2. It would be more natural if set_external_suspend() is private and | |
174 // part of java_suspend(), but that probably would affect the suspend/query | |
175 // performance. Need more investigation on this. | |
176 // | |
177 | |
178 // suspend/resume lock: used for self-suspend | |
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179 Monitor* _SR_lock; |
0 | 180 |
181 protected: | |
182 enum SuspendFlags { | |
183 // NOTE: avoid using the sign-bit as cc generates different test code | |
184 // when the sign-bit is used, and sometimes incorrectly - see CR 6398077 | |
185 | |
186 _external_suspend = 0x20000000U, // thread is asked to self suspend | |
187 _ext_suspended = 0x40000000U, // thread has self-suspended | |
188 _deopt_suspend = 0x10000000U, // thread needs to self suspend for deopt | |
189 | |
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190 _has_async_exception = 0x00000001U, // there is a pending async exception |
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191 _critical_native_unlock = 0x00000002U // Must call back to unlock JNI critical lock |
0 | 192 }; |
193 | |
194 // various suspension related flags - atomically updated | |
195 // overloaded for async exception checking in check_special_condition_for_native_trans. | |
196 volatile uint32_t _suspend_flags; | |
197 | |
198 private: | |
199 int _num_nested_signal; | |
200 | |
201 public: | |
202 void enter_signal_handler() { _num_nested_signal++; } | |
203 void leave_signal_handler() { _num_nested_signal--; } | |
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204 bool is_inside_signal_handler() const { return _num_nested_signal > 0; } |
0 | 205 |
206 private: | |
207 // Debug tracing | |
208 static void trace(const char* msg, const Thread* const thread) PRODUCT_RETURN; | |
209 | |
210 // Active_handles points to a block of handles | |
211 JNIHandleBlock* _active_handles; | |
212 | |
213 // One-element thread local free list | |
214 JNIHandleBlock* _free_handle_block; | |
215 | |
216 // Point to the last handle mark | |
217 HandleMark* _last_handle_mark; | |
218 | |
219 // The parity of the last strong_roots iteration in which this thread was | |
220 // claimed as a task. | |
221 jint _oops_do_parity; | |
222 | |
223 public: | |
224 void set_last_handle_mark(HandleMark* mark) { _last_handle_mark = mark; } | |
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225 HandleMark* last_handle_mark() const { return _last_handle_mark; } |
0 | 226 private: |
227 | |
228 // debug support for checking if code does allow safepoints or not | |
229 // GC points in the VM can happen because of allocation, invoking a VM operation, or blocking on | |
230 // mutex, or blocking on an object synchronizer (Java locking). | |
231 // If !allow_safepoint(), then an assertion failure will happen in any of the above cases | |
232 // If !allow_allocation(), then an assertion failure will happen during allocation | |
233 // (Hence, !allow_safepoint() => !allow_allocation()). | |
234 // | |
235 // The two classes No_Safepoint_Verifier and No_Allocation_Verifier are used to set these counters. | |
236 // | |
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237 NOT_PRODUCT(int _allow_safepoint_count;) // If 0, thread allow a safepoint to happen |
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238 debug_only (int _allow_allocation_count;) // If 0, the thread is allowed to allocate oops. |
0 | 239 |
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240 // Used by SkipGCALot class. |
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241 NOT_PRODUCT(bool _skip_gcalot;) // Should we elide gc-a-lot? |
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242 |
0 | 243 // Record when GC is locked out via the GC_locker mechanism |
244 CHECK_UNHANDLED_OOPS_ONLY(int _gc_locked_out_count;) | |
245 | |
246 friend class No_Alloc_Verifier; | |
247 friend class No_Safepoint_Verifier; | |
248 friend class Pause_No_Safepoint_Verifier; | |
249 friend class ThreadLocalStorage; | |
250 friend class GC_locker; | |
251 | |
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252 ThreadLocalAllocBuffer _tlab; // Thread-local eden |
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253 jlong _allocated_bytes; // Cumulative number of bytes allocated on |
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254 // the Java heap |
0 | 255 |
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256 TRACE_BUFFER _trace_buffer; // Thread-local buffer for tracing |
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257 |
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258 int _vm_operation_started_count; // VM_Operation support |
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259 int _vm_operation_completed_count; // VM_Operation support |
0 | 260 |
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261 ObjectMonitor* _current_pending_monitor; // ObjectMonitor this thread |
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262 // is waiting to lock |
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263 bool _current_pending_monitor_is_from_java; // locking is from Java code |
0 | 264 |
265 // ObjectMonitor on which this thread called Object.wait() | |
266 ObjectMonitor* _current_waiting_monitor; | |
267 | |
268 // Private thread-local objectmonitor list - a simple cache organized as a SLL. | |
269 public: | |
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270 ObjectMonitor* omFreeList; |
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271 int omFreeCount; // length of omFreeList |
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272 int omFreeProvision; // reload chunk size |
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273 ObjectMonitor* omInUseList; // SLL to track monitors in circulation |
1587 | 274 int omInUseCount; // length of omInUseList |
0 | 275 |
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276 #ifdef ASSERT |
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277 private: |
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278 bool _visited_for_critical_count; |
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279 |
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280 public: |
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281 void set_visited_for_critical_count(bool z) { _visited_for_critical_count = z; } |
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282 bool was_visited_for_critical_count() const { return _visited_for_critical_count; } |
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283 #endif |
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284 |
0 | 285 public: |
286 enum { | |
287 is_definitely_current_thread = true | |
288 }; | |
289 | |
290 // Constructor | |
291 Thread(); | |
292 virtual ~Thread(); | |
293 | |
294 // initializtion | |
295 void initialize_thread_local_storage(); | |
296 | |
297 // thread entry point | |
298 virtual void run(); | |
299 | |
300 // Testers | |
301 virtual bool is_VM_thread() const { return false; } | |
302 virtual bool is_Java_thread() const { return false; } | |
303 virtual bool is_Compiler_thread() const { return false; } | |
304 virtual bool is_hidden_from_external_view() const { return false; } | |
305 virtual bool is_jvmti_agent_thread() const { return false; } | |
306 // True iff the thread can perform GC operations at a safepoint. | |
307 // Generally will be true only of VM thread and parallel GC WorkGang | |
308 // threads. | |
309 virtual bool is_GC_task_thread() const { return false; } | |
310 virtual bool is_Watcher_thread() const { return false; } | |
311 virtual bool is_ConcurrentGC_thread() const { return false; } | |
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312 virtual bool is_Named_thread() const { return false; } |
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313 virtual bool is_Worker_thread() const { return false; } |
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314 |
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315 // Casts |
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316 virtual WorkerThread* as_Worker_thread() const { return NULL; } |
0 | 317 |
318 virtual char* name() const { return (char*)"Unknown thread"; } | |
319 | |
320 // Returns the current thread | |
321 static inline Thread* current(); | |
322 | |
323 // Common thread operations | |
324 static void set_priority(Thread* thread, ThreadPriority priority); | |
325 static ThreadPriority get_priority(const Thread* const thread); | |
326 static void start(Thread* thread); | |
327 static void interrupt(Thread* thr); | |
328 static bool is_interrupted(Thread* thr, bool clear_interrupted); | |
329 | |
4006 | 330 void set_native_thread_name(const char *name) { |
331 assert(Thread::current() == this, "set_native_thread_name can only be called on the current thread"); | |
332 os::set_native_thread_name(name); | |
333 } | |
334 | |
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335 ObjectMonitor** omInUseList_addr() { return (ObjectMonitor **)&omInUseList; } |
0 | 336 Monitor* SR_lock() const { return _SR_lock; } |
337 | |
338 bool has_async_exception() const { return (_suspend_flags & _has_async_exception) != 0; } | |
339 | |
340 void set_suspend_flag(SuspendFlags f) { | |
341 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); | |
342 uint32_t flags; | |
343 do { | |
344 flags = _suspend_flags; | |
345 } | |
346 while (Atomic::cmpxchg((jint)(flags | f), | |
347 (volatile jint*)&_suspend_flags, | |
348 (jint)flags) != (jint)flags); | |
349 } | |
350 void clear_suspend_flag(SuspendFlags f) { | |
351 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); | |
352 uint32_t flags; | |
353 do { | |
354 flags = _suspend_flags; | |
355 } | |
356 while (Atomic::cmpxchg((jint)(flags & ~f), | |
357 (volatile jint*)&_suspend_flags, | |
358 (jint)flags) != (jint)flags); | |
359 } | |
360 | |
361 void set_has_async_exception() { | |
362 set_suspend_flag(_has_async_exception); | |
363 } | |
364 void clear_has_async_exception() { | |
365 clear_suspend_flag(_has_async_exception); | |
366 } | |
367 | |
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368 bool do_critical_native_unlock() const { return (_suspend_flags & _critical_native_unlock) != 0; } |
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369 |
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370 void set_critical_native_unlock() { |
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371 set_suspend_flag(_critical_native_unlock); |
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372 } |
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373 void clear_critical_native_unlock() { |
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374 clear_suspend_flag(_critical_native_unlock); |
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375 } |
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376 |
0 | 377 // Support for Unhandled Oop detection |
378 #ifdef CHECK_UNHANDLED_OOPS | |
379 private: | |
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380 UnhandledOops* _unhandled_oops; |
0 | 381 public: |
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382 UnhandledOops* unhandled_oops() { return _unhandled_oops; } |
0 | 383 // Mark oop safe for gc. It may be stack allocated but won't move. |
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384 void allow_unhandled_oop(oop *op) { |
0 | 385 if (CheckUnhandledOops) unhandled_oops()->allow_unhandled_oop(op); |
386 } | |
387 // Clear oops at safepoint so crashes point to unhandled oop violator | |
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388 void clear_unhandled_oops() { |
0 | 389 if (CheckUnhandledOops) unhandled_oops()->clear_unhandled_oops(); |
390 } | |
391 bool is_gc_locked_out() { return _gc_locked_out_count > 0; } | |
392 #endif // CHECK_UNHANDLED_OOPS | |
393 | |
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394 #ifndef PRODUCT |
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395 bool skip_gcalot() { return _skip_gcalot; } |
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396 void set_skip_gcalot(bool v) { _skip_gcalot = v; } |
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397 #endif |
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398 |
0 | 399 public: |
400 // Installs a pending exception to be inserted later | |
401 static void send_async_exception(oop thread_oop, oop java_throwable); | |
402 | |
403 // Resource area | |
404 ResourceArea* resource_area() const { return _resource_area; } | |
405 void set_resource_area(ResourceArea* area) { _resource_area = area; } | |
406 | |
407 OSThread* osthread() const { return _osthread; } | |
408 void set_osthread(OSThread* thread) { _osthread = thread; } | |
409 | |
410 // JNI handle support | |
411 JNIHandleBlock* active_handles() const { return _active_handles; } | |
412 void set_active_handles(JNIHandleBlock* block) { _active_handles = block; } | |
413 JNIHandleBlock* free_handle_block() const { return _free_handle_block; } | |
414 void set_free_handle_block(JNIHandleBlock* block) { _free_handle_block = block; } | |
415 | |
416 // Internal handle support | |
417 HandleArea* handle_area() const { return _handle_area; } | |
418 void set_handle_area(HandleArea* area) { _handle_area = area; } | |
419 | |
420 // Thread-Local Allocation Buffer (TLAB) support | |
421 ThreadLocalAllocBuffer& tlab() { return _tlab; } | |
422 void initialize_tlab() { | |
423 if (UseTLAB) { | |
424 tlab().initialize(); | |
425 } | |
426 } | |
427 | |
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428 jlong allocated_bytes() { return _allocated_bytes; } |
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429 void set_allocated_bytes(jlong value) { _allocated_bytes = value; } |
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430 void incr_allocated_bytes(jlong size) { _allocated_bytes += size; } |
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431 jlong cooked_allocated_bytes() { |
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432 jlong allocated_bytes = OrderAccess::load_acquire(&_allocated_bytes); |
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433 if (UseTLAB) { |
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434 size_t used_bytes = tlab().used_bytes(); |
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435 if ((ssize_t)used_bytes > 0) { |
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436 // More-or-less valid tlab. The load_acquire above should ensure |
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437 // that the result of the add is <= the instantaneous value |
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438 return allocated_bytes + used_bytes; |
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439 } |
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440 } |
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441 return allocated_bytes; |
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442 } |
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443 |
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444 TRACE_BUFFER trace_buffer() { return _trace_buffer; } |
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445 void set_trace_buffer(TRACE_BUFFER buf) { _trace_buffer = buf; } |
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446 |
0 | 447 // VM operation support |
448 int vm_operation_ticket() { return ++_vm_operation_started_count; } | |
449 int vm_operation_completed_count() { return _vm_operation_completed_count; } | |
450 void increment_vm_operation_completed_count() { _vm_operation_completed_count++; } | |
451 | |
452 // For tracking the heavyweight monitor the thread is pending on. | |
453 ObjectMonitor* current_pending_monitor() { | |
454 return _current_pending_monitor; | |
455 } | |
456 void set_current_pending_monitor(ObjectMonitor* monitor) { | |
457 _current_pending_monitor = monitor; | |
458 } | |
459 void set_current_pending_monitor_is_from_java(bool from_java) { | |
460 _current_pending_monitor_is_from_java = from_java; | |
461 } | |
462 bool current_pending_monitor_is_from_java() { | |
463 return _current_pending_monitor_is_from_java; | |
464 } | |
465 | |
466 // For tracking the ObjectMonitor on which this thread called Object.wait() | |
467 ObjectMonitor* current_waiting_monitor() { | |
468 return _current_waiting_monitor; | |
469 } | |
470 void set_current_waiting_monitor(ObjectMonitor* monitor) { | |
471 _current_waiting_monitor = monitor; | |
472 } | |
473 | |
474 // GC support | |
475 // Apply "f->do_oop" to all root oops in "this". | |
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476 // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames |
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477 virtual void oops_do(OopClosure* f, CodeBlobClosure* cf); |
0 | 478 |
479 // Handles the parallel case for the method below. | |
480 private: | |
481 bool claim_oops_do_par_case(int collection_parity); | |
482 public: | |
483 // Requires that "collection_parity" is that of the current strong roots | |
484 // iteration. If "is_par" is false, sets the parity of "this" to | |
485 // "collection_parity", and returns "true". If "is_par" is true, | |
486 // uses an atomic instruction to set the current threads parity to | |
487 // "collection_parity", if it is not already. Returns "true" iff the | |
488 // calling thread does the update, this indicates that the calling thread | |
489 // has claimed the thread's stack as a root groop in the current | |
490 // collection. | |
491 bool claim_oops_do(bool is_par, int collection_parity) { | |
492 if (!is_par) { | |
493 _oops_do_parity = collection_parity; | |
494 return true; | |
495 } else { | |
496 return claim_oops_do_par_case(collection_parity); | |
497 } | |
498 } | |
499 | |
500 // Sweeper support | |
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501 void nmethods_do(CodeBlobClosure* cf); |
0 | 502 |
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503 // Used by fast lock support |
0 | 504 virtual bool is_lock_owned(address adr) const; |
505 | |
506 // Check if address is in the stack of the thread (not just for locks). | |
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507 // Warning: the method can only be used on the running thread |
0 | 508 bool is_in_stack(address adr) const; |
509 | |
510 // Sets this thread as starting thread. Returns failure if thread | |
511 // creation fails due to lack of memory, too many threads etc. | |
512 bool set_as_starting_thread(); | |
513 | |
514 protected: | |
515 // OS data associated with the thread | |
516 OSThread* _osthread; // Platform-specific thread information | |
517 | |
518 // Thread local resource area for temporary allocation within the VM | |
519 ResourceArea* _resource_area; | |
520 | |
521 // Thread local handle area for allocation of handles within the VM | |
522 HandleArea* _handle_area; | |
523 | |
524 // Support for stack overflow handling, get_thread, etc. | |
525 address _stack_base; | |
526 size_t _stack_size; | |
527 uintptr_t _self_raw_id; // used by get_thread (mutable) | |
528 int _lgrp_id; | |
529 | |
530 public: | |
531 // Stack overflow support | |
532 address stack_base() const { assert(_stack_base != NULL,"Sanity check"); return _stack_base; } | |
533 | |
534 void set_stack_base(address base) { _stack_base = base; } | |
535 size_t stack_size() const { return _stack_size; } | |
536 void set_stack_size(size_t size) { _stack_size = size; } | |
537 void record_stack_base_and_size(); | |
538 | |
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539 bool on_local_stack(address adr) const { |
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540 /* QQQ this has knowledge of direction, ought to be a stack method */ |
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541 return (_stack_base >= adr && adr >= (_stack_base - _stack_size)); |
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542 } |
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543 |
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544 uintptr_t self_raw_id() { return _self_raw_id; } |
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545 void set_self_raw_id(uintptr_t value) { _self_raw_id = value; } |
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546 |
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547 int lgrp_id() const { return _lgrp_id; } |
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548 void set_lgrp_id(int value) { _lgrp_id = value; } |
0 | 549 |
550 // Printing | |
551 void print_on(outputStream* st) const; | |
552 void print() const { print_on(tty); } | |
553 virtual void print_on_error(outputStream* st, char* buf, int buflen) const; | |
554 | |
555 // Debug-only code | |
556 #ifdef ASSERT | |
557 private: | |
558 // Deadlock detection support for Mutex locks. List of locks own by thread. | |
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559 Monitor* _owned_locks; |
0 | 560 // Mutex::set_owner_implementation is the only place where _owned_locks is modified, |
561 // thus the friendship | |
562 friend class Mutex; | |
563 friend class Monitor; | |
564 | |
565 public: | |
566 void print_owned_locks_on(outputStream* st) const; | |
567 void print_owned_locks() const { print_owned_locks_on(tty); } | |
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568 Monitor* owned_locks() const { return _owned_locks; } |
0 | 569 bool owns_locks() const { return owned_locks() != NULL; } |
570 bool owns_locks_but_compiled_lock() const; | |
571 | |
572 // Deadlock detection | |
573 bool allow_allocation() { return _allow_allocation_count == 0; } | |
574 #endif | |
575 | |
576 void check_for_valid_safepoint_state(bool potential_vm_operation) PRODUCT_RETURN; | |
577 | |
578 private: | |
579 volatile int _jvmti_env_iteration_count; | |
580 | |
581 public: | |
582 void entering_jvmti_env_iteration() { ++_jvmti_env_iteration_count; } | |
583 void leaving_jvmti_env_iteration() { --_jvmti_env_iteration_count; } | |
584 bool is_inside_jvmti_env_iteration() { return _jvmti_env_iteration_count > 0; } | |
585 | |
586 // Code generation | |
587 static ByteSize exception_file_offset() { return byte_offset_of(Thread, _exception_file ); } | |
588 static ByteSize exception_line_offset() { return byte_offset_of(Thread, _exception_line ); } | |
589 static ByteSize active_handles_offset() { return byte_offset_of(Thread, _active_handles ); } | |
590 | |
591 static ByteSize stack_base_offset() { return byte_offset_of(Thread, _stack_base ); } | |
592 static ByteSize stack_size_offset() { return byte_offset_of(Thread, _stack_size ); } | |
593 | |
594 #define TLAB_FIELD_OFFSET(name) \ | |
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595 static ByteSize tlab_##name##_offset() { return byte_offset_of(Thread, _tlab) + ThreadLocalAllocBuffer::name##_offset(); } |
0 | 596 |
597 TLAB_FIELD_OFFSET(start) | |
598 TLAB_FIELD_OFFSET(end) | |
599 TLAB_FIELD_OFFSET(top) | |
600 TLAB_FIELD_OFFSET(pf_top) | |
601 TLAB_FIELD_OFFSET(size) // desired_size | |
602 TLAB_FIELD_OFFSET(refill_waste_limit) | |
603 TLAB_FIELD_OFFSET(number_of_refills) | |
604 TLAB_FIELD_OFFSET(fast_refill_waste) | |
605 TLAB_FIELD_OFFSET(slow_allocations) | |
606 | |
607 #undef TLAB_FIELD_OFFSET | |
608 | |
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609 static ByteSize allocated_bytes_offset() { return byte_offset_of(Thread, _allocated_bytes ); } |
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610 |
0 | 611 public: |
612 volatile intptr_t _Stalled ; | |
613 volatile int _TypeTag ; | |
614 ParkEvent * _ParkEvent ; // for synchronized() | |
615 ParkEvent * _SleepEvent ; // for Thread.sleep | |
616 ParkEvent * _MutexEvent ; // for native internal Mutex/Monitor | |
617 ParkEvent * _MuxEvent ; // for low-level muxAcquire-muxRelease | |
618 int NativeSyncRecursion ; // diagnostic | |
619 | |
620 volatile int _OnTrap ; // Resume-at IP delta | |
621 jint _hashStateW ; // Marsaglia Shift-XOR thread-local RNG | |
622 jint _hashStateX ; // thread-specific hashCode generator state | |
623 jint _hashStateY ; | |
624 jint _hashStateZ ; | |
625 void * _schedctl ; | |
626 | |
627 intptr_t _ScratchA, _ScratchB ; // Scratch locations for fast-path sync code | |
628 static ByteSize ScratchA_offset() { return byte_offset_of(Thread, _ScratchA ); } | |
629 static ByteSize ScratchB_offset() { return byte_offset_of(Thread, _ScratchB ); } | |
630 | |
631 volatile jint rng [4] ; // RNG for spin loop | |
632 | |
633 // Low-level leaf-lock primitives used to implement synchronization | |
634 // and native monitor-mutex infrastructure. | |
635 // Not for general synchronization use. | |
636 static void SpinAcquire (volatile int * Lock, const char * Name) ; | |
637 static void SpinRelease (volatile int * Lock) ; | |
638 static void muxAcquire (volatile intptr_t * Lock, const char * Name) ; | |
639 static void muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) ; | |
640 static void muxRelease (volatile intptr_t * Lock) ; | |
641 }; | |
642 | |
643 // Inline implementation of Thread::current() | |
644 // Thread::current is "hot" it's called > 128K times in the 1st 500 msecs of | |
645 // startup. | |
646 // ThreadLocalStorage::thread is warm -- it's called > 16K times in the same | |
647 // period. This is inlined in thread_<os_family>.inline.hpp. | |
648 | |
649 inline Thread* Thread::current() { | |
650 #ifdef ASSERT | |
651 // This function is very high traffic. Define PARANOID to enable expensive | |
652 // asserts. | |
653 #ifdef PARANOID | |
654 // Signal handler should call ThreadLocalStorage::get_thread_slow() | |
655 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
656 assert(t != NULL && !t->is_inside_signal_handler(), | |
657 "Don't use Thread::current() inside signal handler"); | |
658 #endif | |
659 #endif | |
660 Thread* thread = ThreadLocalStorage::thread(); | |
661 assert(thread != NULL, "just checking"); | |
662 return thread; | |
663 } | |
664 | |
665 // Name support for threads. non-JavaThread subclasses with multiple | |
666 // uniquely named instances should derive from this. | |
667 class NamedThread: public Thread { | |
668 friend class VMStructs; | |
669 enum { | |
670 max_name_len = 64 | |
671 }; | |
672 private: | |
673 char* _name; | |
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674 // log JavaThread being processed by oops_do |
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675 JavaThread* _processed_thread; |
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676 |
0 | 677 public: |
678 NamedThread(); | |
679 ~NamedThread(); | |
680 // May only be called once per thread. | |
681 void set_name(const char* format, ...); | |
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682 virtual bool is_Named_thread() const { return true; } |
0 | 683 virtual char* name() const { return _name == NULL ? (char*)"Unknown Thread" : _name; } |
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684 JavaThread *processed_thread() { return _processed_thread; } |
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685 void set_processed_thread(JavaThread *thread) { _processed_thread = thread; } |
0 | 686 }; |
687 | |
688 // Worker threads are named and have an id of an assigned work. | |
689 class WorkerThread: public NamedThread { | |
690 private: | |
691 uint _id; | |
692 public: | |
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693 WorkerThread() : _id(0) { } |
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694 virtual bool is_Worker_thread() const { return true; } |
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695 |
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696 virtual WorkerThread* as_Worker_thread() const { |
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697 assert(is_Worker_thread(), "Dubious cast to WorkerThread*?"); |
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698 return (WorkerThread*) this; |
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699 } |
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700 |
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701 void set_id(uint work_id) { _id = work_id; } |
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702 uint id() const { return _id; } |
0 | 703 }; |
704 | |
705 // A single WatcherThread is used for simulating timer interrupts. | |
706 class WatcherThread: public Thread { | |
707 friend class VMStructs; | |
708 public: | |
709 virtual void run(); | |
710 | |
711 private: | |
712 static WatcherThread* _watcher_thread; | |
713 | |
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714 volatile static bool _should_terminate; // updated without holding lock |
0 | 715 public: |
716 enum SomeConstants { | |
717 delay_interval = 10 // interrupt delay in milliseconds | |
718 }; | |
719 | |
720 // Constructor | |
721 WatcherThread(); | |
722 | |
723 // Tester | |
724 bool is_Watcher_thread() const { return true; } | |
725 | |
726 // Printing | |
727 char* name() const { return (char*)"VM Periodic Task Thread"; } | |
728 void print_on(outputStream* st) const; | |
729 void print() const { print_on(tty); } | |
730 | |
731 // Returns the single instance of WatcherThread | |
732 static WatcherThread* watcher_thread() { return _watcher_thread; } | |
733 | |
734 // Create and start the single instance of WatcherThread, or stop it on shutdown | |
735 static void start(); | |
736 static void stop(); | |
737 }; | |
738 | |
739 | |
740 class CompilerThread; | |
741 | |
742 typedef void (*ThreadFunction)(JavaThread*, TRAPS); | |
743 | |
744 class JavaThread: public Thread { | |
745 friend class VMStructs; | |
746 private: | |
747 JavaThread* _next; // The next thread in the Threads list | |
748 oop _threadObj; // The Java level thread object | |
749 | |
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750 // (thomaswue) Necessary for holding a compilation buffer and ci environment. Moved from CompilerThread to JavaThread in order to enable code installation from Java application code. |
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751 BufferBlob* _buffer_blob; |
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752 ciEnv* _env; |
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753 bool _is_compiling; |
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754 |
0 | 755 #ifdef ASSERT |
756 private: | |
757 int _java_call_counter; | |
758 | |
759 public: | |
760 int java_call_counter() { return _java_call_counter; } | |
761 void inc_java_call_counter() { _java_call_counter++; } | |
762 void dec_java_call_counter() { | |
763 assert(_java_call_counter > 0, "Invalid nesting of JavaCallWrapper"); | |
764 _java_call_counter--; | |
765 } | |
766 private: // restore original namespace restriction | |
767 #endif // ifdef ASSERT | |
768 | |
769 #ifndef PRODUCT | |
770 public: | |
771 enum { | |
772 jump_ring_buffer_size = 16 | |
773 }; | |
774 private: // restore original namespace restriction | |
775 #endif | |
776 | |
777 JavaFrameAnchor _anchor; // Encapsulation of current java frame and it state | |
778 | |
779 ThreadFunction _entry_point; | |
780 | |
781 JNIEnv _jni_environment; | |
782 | |
783 // Deopt support | |
784 DeoptResourceMark* _deopt_mark; // Holds special ResourceMark for deoptimization | |
785 | |
786 intptr_t* _must_deopt_id; // id of frame that needs to be deopted once we | |
787 // transition out of native | |
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788 nmethod* _deopt_nmethod; // nmethod that is currently being deoptimized |
0 | 789 vframeArray* _vframe_array_head; // Holds the heap of the active vframeArrays |
790 vframeArray* _vframe_array_last; // Holds last vFrameArray we popped | |
791 // Because deoptimization is lazy we must save jvmti requests to set locals | |
792 // in compiled frames until we deoptimize and we have an interpreter frame. | |
793 // This holds the pointer to array (yeah like there might be more than one) of | |
794 // description of compiled vframes that have locals that need to be updated. | |
795 GrowableArray<jvmtiDeferredLocalVariableSet*>* _deferred_locals_updates; | |
796 | |
797 // Handshake value for fixing 6243940. We need a place for the i2c | |
798 // adapter to store the callee methodOop. This value is NEVER live | |
799 // across a gc point so it does NOT have to be gc'd | |
800 // The handshake is open ended since we can't be certain that it will | |
801 // be NULLed. This is because we rarely ever see the race and end up | |
802 // in handle_wrong_method which is the backend of the handshake. See | |
803 // code in i2c adapters and handle_wrong_method. | |
804 | |
805 methodOop _callee_target; | |
806 | |
807 // Oop results of VM runtime calls | |
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808 oop _vm_result; // Used to pass back an oop result into Java code, GC-preserved |
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809 oop _vm_result_2; // Used to pass back an oop result into Java code, GC-preserved |
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810 |
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811 // See ReduceInitialCardMarks: this holds the precise space interval of |
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812 // the most recent slow path allocation for which compiled code has |
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813 // elided card-marks for performance along the fast-path. |
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814 MemRegion _deferred_card_mark; |
0 | 815 |
816 MonitorChunk* _monitor_chunks; // Contains the off stack monitors | |
817 // allocated during deoptimization | |
818 // and by JNI_MonitorEnter/Exit | |
819 | |
820 // Async. requests support | |
821 enum AsyncRequests { | |
822 _no_async_condition = 0, | |
823 _async_exception, | |
824 _async_unsafe_access_error | |
825 }; | |
826 AsyncRequests _special_runtime_exit_condition; // Enum indicating pending async. request | |
827 oop _pending_async_exception; | |
828 | |
829 // Safepoint support | |
830 public: // Expose _thread_state for SafeFetchInt() | |
831 volatile JavaThreadState _thread_state; | |
832 private: | |
833 ThreadSafepointState *_safepoint_state; // Holds information about a thread during a safepoint | |
834 address _saved_exception_pc; // Saved pc of instruction where last implicit exception happened | |
835 | |
836 // JavaThread termination support | |
837 enum TerminatedTypes { | |
838 _not_terminated = 0xDEAD - 2, | |
839 _thread_exiting, // JavaThread::exit() has been called for this thread | |
840 _thread_terminated, // JavaThread is removed from thread list | |
841 _vm_exited // JavaThread is still executing native code, but VM is terminated | |
842 // only VM_Exit can set _vm_exited | |
843 }; | |
844 | |
845 // In general a JavaThread's _terminated field transitions as follows: | |
846 // | |
847 // _not_terminated => _thread_exiting => _thread_terminated | |
848 // | |
849 // _vm_exited is a special value to cover the case of a JavaThread | |
850 // executing native code after the VM itself is terminated. | |
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851 volatile TerminatedTypes _terminated; |
0 | 852 // suspend/resume support |
853 volatile bool _suspend_equivalent; // Suspend equivalent condition | |
854 jint _in_deopt_handler; // count of deoptimization | |
855 // handlers thread is in | |
856 volatile bool _doing_unsafe_access; // Thread may fault due to unsafe access | |
857 bool _do_not_unlock_if_synchronized; // Do not unlock the receiver of a synchronized method (since it was | |
858 // never locked) when throwing an exception. Used by interpreter only. | |
859 | |
4006 | 860 // JNI attach states: |
861 enum JNIAttachStates { | |
862 _not_attaching_via_jni = 1, // thread is not attaching via JNI | |
863 _attaching_via_jni, // thread is attaching via JNI | |
864 _attached_via_jni // thread has attached via JNI | |
865 }; | |
866 | |
867 // A regular JavaThread's _jni_attach_state is _not_attaching_via_jni. | |
868 // A native thread that is attaching via JNI starts with a value | |
869 // of _attaching_via_jni and transitions to _attached_via_jni. | |
870 volatile JNIAttachStates _jni_attach_state; | |
0 | 871 |
872 public: | |
873 // State of the stack guard pages for this thread. | |
874 enum StackGuardState { | |
875 stack_guard_unused, // not needed | |
876 stack_guard_yellow_disabled,// disabled (temporarily) after stack overflow | |
877 stack_guard_enabled // enabled | |
878 }; | |
879 | |
880 private: | |
881 | |
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882 #ifdef GRAAL |
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883 // graal needs some place to put the dimensions |
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884 jint _graal_multinewarray_storage[256]; |
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885 |
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886 volatile oop _graal_deopt_info; |
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887 address _graal_alternate_call_target; |
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888 #endif |
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889 #ifdef HIGH_LEVEL_INTERPRETER |
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890 bool _high_level_interpreter_in_vm; |
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891 #endif |
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892 |
0 | 893 StackGuardState _stack_guard_state; |
894 | |
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895 nmethod* _scanned_nmethod; // nmethod being scanned by the sweeper |
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896 |
0 | 897 // Compiler exception handling (NOTE: The _exception_oop is *NOT* the same as _pending_exception. It is |
898 // used to temp. parsing values into and out of the runtime system during exception handling for compiled | |
899 // code) | |
900 volatile oop _exception_oop; // Exception thrown in compiled code | |
901 volatile address _exception_pc; // PC where exception happened | |
902 volatile address _exception_handler_pc; // PC for handler of exception | |
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903 volatile int _is_method_handle_return; // true (== 1) if the current exception PC is a MethodHandle call site. |
0 | 904 |
905 // support for JNI critical regions | |
906 jint _jni_active_critical; // count of entries into JNI critical region | |
907 | |
908 // For deadlock detection. | |
909 int _depth_first_number; | |
910 | |
911 // JVMTI PopFrame support | |
912 // This is set to popframe_pending to signal that top Java frame should be popped immediately | |
913 int _popframe_condition; | |
914 | |
915 #ifndef PRODUCT | |
916 int _jmp_ring_index; | |
917 struct { | |
918 // We use intptr_t instead of address so debugger doesn't try and display strings | |
919 intptr_t _target; | |
920 intptr_t _instruction; | |
921 const char* _file; | |
922 int _line; | |
923 } _jmp_ring[ jump_ring_buffer_size ]; | |
924 #endif /* PRODUCT */ | |
925 | |
342 | 926 #ifndef SERIALGC |
927 // Support for G1 barriers | |
928 | |
929 ObjPtrQueue _satb_mark_queue; // Thread-local log for SATB barrier. | |
930 // Set of all such queues. | |
931 static SATBMarkQueueSet _satb_mark_queue_set; | |
932 | |
933 DirtyCardQueue _dirty_card_queue; // Thread-local log for dirty cards. | |
934 // Set of all such queues. | |
935 static DirtyCardQueueSet _dirty_card_queue_set; | |
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936 |
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937 void flush_barrier_queues(); |
342 | 938 #endif // !SERIALGC |
939 | |
0 | 940 friend class VMThread; |
941 friend class ThreadWaitTransition; | |
942 friend class VM_Exit; | |
943 | |
944 void initialize(); // Initialized the instance variables | |
945 | |
946 public: | |
947 // Constructor | |
4006 | 948 JavaThread(bool is_attaching_via_jni = false); // for main thread and JNI attached threads |
0 | 949 JavaThread(ThreadFunction entry_point, size_t stack_size = 0); |
950 ~JavaThread(); | |
951 | |
952 #ifdef ASSERT | |
953 // verify this JavaThread hasn't be published in the Threads::list yet | |
954 void verify_not_published(); | |
955 #endif | |
956 | |
957 //JNI functiontable getter/setter for JVMTI jni function table interception API. | |
958 void set_jni_functions(struct JNINativeInterface_* functionTable) { | |
959 _jni_environment.functions = functionTable; | |
960 } | |
961 struct JNINativeInterface_* get_jni_functions() { | |
962 return (struct JNINativeInterface_ *)_jni_environment.functions; | |
963 } | |
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964 |
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965 bool is_compiling() const { return _is_compiling; } |
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966 void set_compiling(bool b) { _is_compiling = b; } |
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967 |
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968 // Get/set the thread's compilation environment. |
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969 ciEnv* env() { return _env; } |
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970 void set_env(ciEnv* env) { _env = env; } |
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971 |
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972 BufferBlob* get_buffer_blob() { return _buffer_blob; } |
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973 void set_buffer_blob(BufferBlob* b) { _buffer_blob = b; }; |
0 | 974 |
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975 // This function is called at thread creation to allow |
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976 // platform specific thread variables to be initialized. |
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977 void cache_global_variables(); |
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978 |
0 | 979 // Executes Shutdown.shutdown() |
980 void invoke_shutdown_hooks(); | |
981 | |
982 // Cleanup on thread exit | |
983 enum ExitType { | |
984 normal_exit, | |
985 jni_detach | |
986 }; | |
987 void exit(bool destroy_vm, ExitType exit_type = normal_exit); | |
988 | |
989 void cleanup_failed_attach_current_thread(); | |
990 | |
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991 // Track the nmethod currently being scanned by the sweeper |
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992 void set_scanned_nmethod(nmethod* nm) { |
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993 assert(_scanned_nmethod == NULL || nm == NULL, "should reset to NULL before writing a new value"); |
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994 _scanned_nmethod = nm; |
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995 } |
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996 |
0 | 997 // Testers |
998 virtual bool is_Java_thread() const { return true; } | |
999 | |
1000 // Thread chain operations | |
1001 JavaThread* next() const { return _next; } | |
1002 void set_next(JavaThread* p) { _next = p; } | |
1003 | |
1004 // Thread oop. threadObj() can be NULL for initial JavaThread | |
1005 // (or for threads attached via JNI) | |
1006 oop threadObj() const { return _threadObj; } | |
1007 void set_threadObj(oop p) { _threadObj = p; } | |
1008 | |
1009 ThreadPriority java_priority() const; // Read from threadObj() | |
1010 | |
1011 // Prepare thread and add to priority queue. If a priority is | |
1012 // not specified, use the priority of the thread object. Threads_lock | |
1013 // must be held while this function is called. | |
1014 void prepare(jobject jni_thread, ThreadPriority prio=NoPriority); | |
1015 | |
1016 void set_saved_exception_pc(address pc) { _saved_exception_pc = pc; } | |
1017 address saved_exception_pc() { return _saved_exception_pc; } | |
1018 | |
1019 | |
1020 ThreadFunction entry_point() const { return _entry_point; } | |
1021 | |
1022 // Allocates a new Java level thread object for this thread. thread_name may be NULL. | |
1023 void allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS); | |
1024 | |
1025 // Last frame anchor routines | |
1026 | |
1027 JavaFrameAnchor* frame_anchor(void) { return &_anchor; } | |
1028 | |
1029 // last_Java_sp | |
1030 bool has_last_Java_frame() const { return _anchor.has_last_Java_frame(); } | |
1031 intptr_t* last_Java_sp() const { return _anchor.last_Java_sp(); } | |
1032 | |
1033 // last_Java_pc | |
1034 | |
1035 address last_Java_pc(void) { return _anchor.last_Java_pc(); } | |
1036 | |
1037 // Safepoint support | |
1038 JavaThreadState thread_state() const { return _thread_state; } | |
1039 void set_thread_state(JavaThreadState s) { _thread_state=s; } | |
1040 ThreadSafepointState *safepoint_state() const { return _safepoint_state; } | |
1041 void set_safepoint_state(ThreadSafepointState *state) { _safepoint_state = state; } | |
1042 bool is_at_poll_safepoint() { return _safepoint_state->is_at_poll_safepoint(); } | |
1043 | |
1044 // thread has called JavaThread::exit() or is terminated | |
1045 bool is_exiting() { return _terminated == _thread_exiting || is_terminated(); } | |
1046 // thread is terminated (no longer on the threads list); we compare | |
1047 // against the two non-terminated values so that a freed JavaThread | |
1048 // will also be considered terminated. | |
1049 bool is_terminated() { return _terminated != _not_terminated && _terminated != _thread_exiting; } | |
1050 void set_terminated(TerminatedTypes t) { _terminated = t; } | |
1051 // special for Threads::remove() which is static: | |
1052 void set_terminated_value() { _terminated = _thread_terminated; } | |
1053 void block_if_vm_exited(); | |
1054 | |
1055 bool doing_unsafe_access() { return _doing_unsafe_access; } | |
1056 void set_doing_unsafe_access(bool val) { _doing_unsafe_access = val; } | |
1057 | |
1058 bool do_not_unlock_if_synchronized() { return _do_not_unlock_if_synchronized; } | |
1059 void set_do_not_unlock_if_synchronized(bool val) { _do_not_unlock_if_synchronized = val; } | |
1060 | |
6197 | 1061 // native memory tracking |
1062 inline MemRecorder* get_recorder() const { return (MemRecorder*)_recorder; } | |
1063 inline void set_recorder(MemRecorder* rc) { _recorder = (volatile MemRecorder*)rc; } | |
1064 | |
1065 private: | |
1066 // per-thread memory recorder | |
1067 volatile MemRecorder* _recorder; | |
0 | 1068 |
1069 // Suspend/resume support for JavaThread | |
1070 private: | |
1071 void set_ext_suspended() { set_suspend_flag (_ext_suspended); } | |
1072 void clear_ext_suspended() { clear_suspend_flag(_ext_suspended); } | |
1073 | |
1074 public: | |
1075 void java_suspend(); | |
1076 void java_resume(); | |
1077 int java_suspend_self(); | |
1078 | |
1079 void check_and_wait_while_suspended() { | |
1080 assert(JavaThread::current() == this, "sanity check"); | |
1081 | |
1082 bool do_self_suspend; | |
1083 do { | |
1084 // were we externally suspended while we were waiting? | |
1085 do_self_suspend = handle_special_suspend_equivalent_condition(); | |
1086 if (do_self_suspend) { | |
1087 // don't surprise the thread that suspended us by returning | |
1088 java_suspend_self(); | |
1089 set_suspend_equivalent(); | |
1090 } | |
1091 } while (do_self_suspend); | |
1092 } | |
1093 static void check_safepoint_and_suspend_for_native_trans(JavaThread *thread); | |
1094 // Check for async exception in addition to safepoint and suspend request. | |
1095 static void check_special_condition_for_native_trans(JavaThread *thread); | |
1096 | |
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1097 // Same as check_special_condition_for_native_trans but finishes the |
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1098 // transition into thread_in_Java mode so that it can potentially |
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1099 // block. |
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1100 static void check_special_condition_for_native_trans_and_transition(JavaThread *thread); |
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1101 |
0 | 1102 bool is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits); |
1103 bool is_ext_suspend_completed_with_lock(uint32_t *bits) { | |
1104 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1105 // Warning: is_ext_suspend_completed() may temporarily drop the | |
1106 // SR_lock to allow the thread to reach a stable thread state if | |
1107 // it is currently in a transient thread state. | |
1108 return is_ext_suspend_completed(false /*!called_by_wait */, | |
1109 SuspendRetryDelay, bits); | |
1110 } | |
1111 | |
1112 // We cannot allow wait_for_ext_suspend_completion() to run forever or | |
1113 // we could hang. SuspendRetryCount and SuspendRetryDelay are normally | |
1114 // passed as the count and delay parameters. Experiments with specific | |
1115 // calls to wait_for_ext_suspend_completion() can be done by passing | |
1116 // other values in the code. Experiments with all calls can be done | |
1117 // via the appropriate -XX options. | |
1118 bool wait_for_ext_suspend_completion(int count, int delay, uint32_t *bits); | |
1119 | |
1120 void set_external_suspend() { set_suspend_flag (_external_suspend); } | |
1121 void clear_external_suspend() { clear_suspend_flag(_external_suspend); } | |
1122 | |
1123 void set_deopt_suspend() { set_suspend_flag (_deopt_suspend); } | |
1124 void clear_deopt_suspend() { clear_suspend_flag(_deopt_suspend); } | |
1125 bool is_deopt_suspend() { return (_suspend_flags & _deopt_suspend) != 0; } | |
1126 | |
1127 bool is_external_suspend() const { | |
1128 return (_suspend_flags & _external_suspend) != 0; | |
1129 } | |
1130 // Whenever a thread transitions from native to vm/java it must suspend | |
1131 // if external|deopt suspend is present. | |
1132 bool is_suspend_after_native() const { | |
1133 return (_suspend_flags & (_external_suspend | _deopt_suspend) ) != 0; | |
1134 } | |
1135 | |
1136 // external suspend request is completed | |
1137 bool is_ext_suspended() const { | |
1138 return (_suspend_flags & _ext_suspended) != 0; | |
1139 } | |
1140 | |
1141 bool is_external_suspend_with_lock() const { | |
1142 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1143 return is_external_suspend(); | |
1144 } | |
1145 | |
1146 // Special method to handle a pending external suspend request | |
1147 // when a suspend equivalent condition lifts. | |
1148 bool handle_special_suspend_equivalent_condition() { | |
1149 assert(is_suspend_equivalent(), | |
1150 "should only be called in a suspend equivalence condition"); | |
1151 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1152 bool ret = is_external_suspend(); | |
1153 if (!ret) { | |
1154 // not about to self-suspend so clear suspend equivalence | |
1155 clear_suspend_equivalent(); | |
1156 } | |
1157 // implied else: | |
1158 // We have a pending external suspend request so we leave the | |
1159 // suspend_equivalent flag set until java_suspend_self() sets | |
1160 // the ext_suspended flag and clears the suspend_equivalent | |
1161 // flag. This insures that wait_for_ext_suspend_completion() | |
1162 // will return consistent values. | |
1163 return ret; | |
1164 } | |
1165 | |
1166 // utility methods to see if we are doing some kind of suspension | |
1167 bool is_being_ext_suspended() const { | |
1168 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1169 return is_ext_suspended() || is_external_suspend(); | |
1170 } | |
1171 | |
1172 bool is_suspend_equivalent() const { return _suspend_equivalent; } | |
1173 | |
1174 void set_suspend_equivalent() { _suspend_equivalent = true; }; | |
1175 void clear_suspend_equivalent() { _suspend_equivalent = false; }; | |
1176 | |
1177 // Thread.stop support | |
1178 void send_thread_stop(oop throwable); | |
1179 AsyncRequests clear_special_runtime_exit_condition() { | |
1180 AsyncRequests x = _special_runtime_exit_condition; | |
1181 _special_runtime_exit_condition = _no_async_condition; | |
1182 return x; | |
1183 } | |
1184 | |
1185 // Are any async conditions present? | |
1186 bool has_async_condition() { return (_special_runtime_exit_condition != _no_async_condition); } | |
1187 | |
1188 void check_and_handle_async_exceptions(bool check_unsafe_error = true); | |
1189 | |
1190 // these next two are also used for self-suspension and async exception support | |
1191 void handle_special_runtime_exit_condition(bool check_asyncs = true); | |
1192 | |
1193 // Return true if JavaThread has an asynchronous condition or | |
1194 // if external suspension is requested. | |
1195 bool has_special_runtime_exit_condition() { | |
1196 // We call is_external_suspend() last since external suspend should | |
1197 // be less common. Because we don't use is_external_suspend_with_lock | |
1198 // it is possible that we won't see an asynchronous external suspend | |
1199 // request that has just gotten started, i.e., SR_lock grabbed but | |
1200 // _external_suspend field change either not made yet or not visible | |
1201 // yet. However, this is okay because the request is asynchronous and | |
1202 // we will see the new flag value the next time through. It's also | |
1203 // possible that the external suspend request is dropped after | |
1204 // we have checked is_external_suspend(), we will recheck its value | |
1205 // under SR_lock in java_suspend_self(). | |
1206 return (_special_runtime_exit_condition != _no_async_condition) || | |
1207 is_external_suspend() || is_deopt_suspend(); | |
1208 } | |
1209 | |
1210 void set_pending_unsafe_access_error() { _special_runtime_exit_condition = _async_unsafe_access_error; } | |
1211 | |
1212 void set_pending_async_exception(oop e) { | |
1213 _pending_async_exception = e; | |
1214 _special_runtime_exit_condition = _async_exception; | |
1215 set_has_async_exception(); | |
1216 } | |
1217 | |
1218 // Fast-locking support | |
1219 bool is_lock_owned(address adr) const; | |
1220 | |
1221 // Accessors for vframe array top | |
1222 // The linked list of vframe arrays are sorted on sp. This means when we | |
1223 // unpack the head must contain the vframe array to unpack. | |
1224 void set_vframe_array_head(vframeArray* value) { _vframe_array_head = value; } | |
1225 vframeArray* vframe_array_head() const { return _vframe_array_head; } | |
1226 | |
1227 // Side structure for defering update of java frame locals until deopt occurs | |
1228 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred_locals() const { return _deferred_locals_updates; } | |
1229 void set_deferred_locals(GrowableArray<jvmtiDeferredLocalVariableSet *>* vf) { _deferred_locals_updates = vf; } | |
1230 | |
1231 // These only really exist to make debugging deopt problems simpler | |
1232 | |
1233 void set_vframe_array_last(vframeArray* value) { _vframe_array_last = value; } | |
1234 vframeArray* vframe_array_last() const { return _vframe_array_last; } | |
1235 | |
1236 // The special resourceMark used during deoptimization | |
1237 | |
1238 void set_deopt_mark(DeoptResourceMark* value) { _deopt_mark = value; } | |
1239 DeoptResourceMark* deopt_mark(void) { return _deopt_mark; } | |
1240 | |
1241 intptr_t* must_deopt_id() { return _must_deopt_id; } | |
1242 void set_must_deopt_id(intptr_t* id) { _must_deopt_id = id; } | |
1243 void clear_must_deopt_id() { _must_deopt_id = NULL; } | |
1244 | |
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1245 void set_deopt_nmethod(nmethod* nm) { _deopt_nmethod = nm; } |
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1246 nmethod* deopt_nmethod() { return _deopt_nmethod; } |
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1247 |
0 | 1248 methodOop callee_target() const { return _callee_target; } |
1249 void set_callee_target (methodOop x) { _callee_target = x; } | |
1250 | |
1251 // Oop results of vm runtime calls | |
1252 oop vm_result() const { return _vm_result; } | |
1253 void set_vm_result (oop x) { _vm_result = x; } | |
1254 | |
1255 oop vm_result_2() const { return _vm_result_2; } | |
1256 void set_vm_result_2 (oop x) { _vm_result_2 = x; } | |
1257 | |
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1258 MemRegion deferred_card_mark() const { return _deferred_card_mark; } |
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1259 void set_deferred_card_mark(MemRegion mr) { _deferred_card_mark = mr; } |
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1260 |
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1261 #ifdef GRAAL |
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1262 oop graal_deopt_info() const { return _graal_deopt_info; } |
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1263 void set_graal_deopt_info(oop o) { _graal_deopt_info = o; } |
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1264 |
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1265 void set_graal_alternate_call_target(address a) { _graal_alternate_call_target = a; } |
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1266 #endif |
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1267 #ifdef HIGH_LEVEL_INTERPRETER |
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1268 bool high_level_interpreter_in_vm() { return _high_level_interpreter_in_vm; } |
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1269 void set_high_level_interpreter_in_vm(bool value) { _high_level_interpreter_in_vm = value; } |
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1270 #endif |
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1271 |
0 | 1272 // Exception handling for compiled methods |
1273 oop exception_oop() const { return _exception_oop; } | |
1274 address exception_pc() const { return _exception_pc; } | |
1275 address exception_handler_pc() const { return _exception_handler_pc; } | |
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1276 bool is_method_handle_return() const { return _is_method_handle_return == 1; } |
0 | 1277 |
1278 void set_exception_oop(oop o) { _exception_oop = o; } | |
1279 void set_exception_pc(address a) { _exception_pc = a; } | |
1280 void set_exception_handler_pc(address a) { _exception_handler_pc = a; } | |
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1281 void set_is_method_handle_return(bool value) { _is_method_handle_return = value ? 1 : 0; } |
0 | 1282 |
1283 // Stack overflow support | |
1284 inline size_t stack_available(address cur_sp); | |
1285 address stack_yellow_zone_base() | |
1286 { return (address)(stack_base() - (stack_size() - (stack_red_zone_size() + stack_yellow_zone_size()))); } | |
1287 size_t stack_yellow_zone_size() | |
1288 { return StackYellowPages * os::vm_page_size(); } | |
1289 address stack_red_zone_base() | |
1290 { return (address)(stack_base() - (stack_size() - stack_red_zone_size())); } | |
1291 size_t stack_red_zone_size() | |
1292 { return StackRedPages * os::vm_page_size(); } | |
1293 bool in_stack_yellow_zone(address a) | |
1294 { return (a <= stack_yellow_zone_base()) && (a >= stack_red_zone_base()); } | |
1295 bool in_stack_red_zone(address a) | |
1296 { return (a <= stack_red_zone_base()) && (a >= (address)((intptr_t)stack_base() - stack_size())); } | |
1297 | |
1298 void create_stack_guard_pages(); | |
1299 void remove_stack_guard_pages(); | |
1300 | |
1301 void enable_stack_yellow_zone(); | |
1302 void disable_stack_yellow_zone(); | |
1303 void enable_stack_red_zone(); | |
1304 void disable_stack_red_zone(); | |
1305 | |
1306 inline bool stack_yellow_zone_disabled(); | |
1307 inline bool stack_yellow_zone_enabled(); | |
1308 | |
1309 // Attempt to reguard the stack after a stack overflow may have occurred. | |
1310 // Returns true if (a) guard pages are not needed on this thread, (b) the | |
1311 // pages are already guarded, or (c) the pages were successfully reguarded. | |
1312 // Returns false if there is not enough stack space to reguard the pages, in | |
1313 // which case the caller should unwind a frame and try again. The argument | |
1314 // should be the caller's (approximate) sp. | |
1315 bool reguard_stack(address cur_sp); | |
1316 // Similar to above but see if current stackpoint is out of the guard area | |
1317 // and reguard if possible. | |
1318 bool reguard_stack(void); | |
1319 | |
1320 // Misc. accessors/mutators | |
1321 void set_do_not_unlock(void) { _do_not_unlock_if_synchronized = true; } | |
1322 void clr_do_not_unlock(void) { _do_not_unlock_if_synchronized = false; } | |
1323 bool do_not_unlock(void) { return _do_not_unlock_if_synchronized; } | |
1324 | |
1325 #ifndef PRODUCT | |
1326 void record_jump(address target, address instr, const char* file, int line); | |
1327 #endif /* PRODUCT */ | |
1328 | |
1329 // For assembly stub generation | |
1330 static ByteSize threadObj_offset() { return byte_offset_of(JavaThread, _threadObj ); } | |
1331 #ifndef PRODUCT | |
1332 static ByteSize jmp_ring_index_offset() { return byte_offset_of(JavaThread, _jmp_ring_index ); } | |
1333 static ByteSize jmp_ring_offset() { return byte_offset_of(JavaThread, _jmp_ring ); } | |
1334 #endif /* PRODUCT */ | |
1335 static ByteSize jni_environment_offset() { return byte_offset_of(JavaThread, _jni_environment ); } | |
1336 static ByteSize last_Java_sp_offset() { | |
1337 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_sp_offset(); | |
1338 } | |
1339 static ByteSize last_Java_pc_offset() { | |
1340 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_pc_offset(); | |
1341 } | |
1342 static ByteSize frame_anchor_offset() { | |
1343 return byte_offset_of(JavaThread, _anchor); | |
1344 } | |
1345 static ByteSize callee_target_offset() { return byte_offset_of(JavaThread, _callee_target ); } | |
1346 static ByteSize vm_result_offset() { return byte_offset_of(JavaThread, _vm_result ); } | |
1347 static ByteSize vm_result_2_offset() { return byte_offset_of(JavaThread, _vm_result_2 ); } | |
1348 static ByteSize thread_state_offset() { return byte_offset_of(JavaThread, _thread_state ); } | |
1349 static ByteSize saved_exception_pc_offset() { return byte_offset_of(JavaThread, _saved_exception_pc ); } | |
1350 static ByteSize osthread_offset() { return byte_offset_of(JavaThread, _osthread ); } | |
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1351 #ifdef GRAAL |
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1352 static ByteSize graal_deopt_info_offset() { return byte_offset_of(JavaThread, _graal_deopt_info ); } |
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1353 static ByteSize graal_alternate_call_target_offset() { return byte_offset_of(JavaThread, _graal_alternate_call_target); } |
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1354 static ByteSize graal_multinewarray_storage_offset() { return byte_offset_of(JavaThread, _graal_multinewarray_storage); } |
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1355 #endif |
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1356 #ifdef HIGH_LEVEL_INTERPRETER |
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1357 static ByteSize high_level_interpreter_in_vm_offset() { return byte_offset_of(JavaThread, _high_level_interpreter_in_vm); } |
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1358 #endif |
0 | 1359 static ByteSize exception_oop_offset() { return byte_offset_of(JavaThread, _exception_oop ); } |
1360 static ByteSize exception_pc_offset() { return byte_offset_of(JavaThread, _exception_pc ); } | |
1361 static ByteSize exception_handler_pc_offset() { return byte_offset_of(JavaThread, _exception_handler_pc); } | |
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1362 static ByteSize is_method_handle_return_offset() { return byte_offset_of(JavaThread, _is_method_handle_return); } |
0 | 1363 static ByteSize stack_guard_state_offset() { return byte_offset_of(JavaThread, _stack_guard_state ); } |
1364 static ByteSize suspend_flags_offset() { return byte_offset_of(JavaThread, _suspend_flags ); } | |
1365 | |
1366 static ByteSize do_not_unlock_if_synchronized_offset() { return byte_offset_of(JavaThread, _do_not_unlock_if_synchronized); } | |
1213
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1367 static ByteSize should_post_on_exceptions_flag_offset() { |
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1368 return byte_offset_of(JavaThread, _should_post_on_exceptions_flag); |
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1369 } |
0 | 1370 |
342 | 1371 #ifndef SERIALGC |
1372 static ByteSize satb_mark_queue_offset() { return byte_offset_of(JavaThread, _satb_mark_queue); } | |
1373 static ByteSize dirty_card_queue_offset() { return byte_offset_of(JavaThread, _dirty_card_queue); } | |
1374 #endif // !SERIALGC | |
1375 | |
0 | 1376 // Returns the jni environment for this thread |
1377 JNIEnv* jni_environment() { return &_jni_environment; } | |
1378 | |
1379 static JavaThread* thread_from_jni_environment(JNIEnv* env) { | |
1380 JavaThread *thread_from_jni_env = (JavaThread*)((intptr_t)env - in_bytes(jni_environment_offset())); | |
1381 // Only return NULL if thread is off the thread list; starting to | |
1382 // exit should not return NULL. | |
1383 if (thread_from_jni_env->is_terminated()) { | |
1384 thread_from_jni_env->block_if_vm_exited(); | |
1385 return NULL; | |
1386 } else { | |
1387 return thread_from_jni_env; | |
1388 } | |
1389 } | |
1390 | |
1391 // JNI critical regions. These can nest. | |
1392 bool in_critical() { return _jni_active_critical > 0; } | |
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1393 bool in_last_critical() { return _jni_active_critical == 1; } |
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1394 void enter_critical() { assert(Thread::current() == this || |
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1395 Thread::current()->is_VM_thread() && SafepointSynchronize::is_synchronizing(), |
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1396 "this must be current thread or synchronizing"); |
0 | 1397 _jni_active_critical++; } |
1398 void exit_critical() { assert(Thread::current() == this, | |
1399 "this must be current thread"); | |
1400 _jni_active_critical--; | |
1401 assert(_jni_active_critical >= 0, | |
1402 "JNI critical nesting problem?"); } | |
1403 | |
1404 // For deadlock detection | |
1405 int depth_first_number() { return _depth_first_number; } | |
1406 void set_depth_first_number(int dfn) { _depth_first_number = dfn; } | |
1407 | |
1408 private: | |
1409 void set_monitor_chunks(MonitorChunk* monitor_chunks) { _monitor_chunks = monitor_chunks; } | |
1410 | |
1411 public: | |
1412 MonitorChunk* monitor_chunks() const { return _monitor_chunks; } | |
1413 void add_monitor_chunk(MonitorChunk* chunk); | |
1414 void remove_monitor_chunk(MonitorChunk* chunk); | |
1415 bool in_deopt_handler() const { return _in_deopt_handler > 0; } | |
1416 void inc_in_deopt_handler() { _in_deopt_handler++; } | |
1417 void dec_in_deopt_handler() { | |
1418 assert(_in_deopt_handler > 0, "mismatched deopt nesting"); | |
1419 if (_in_deopt_handler > 0) { // robustness | |
1420 _in_deopt_handler--; | |
1421 } | |
1422 } | |
1423 | |
1424 private: | |
1425 void set_entry_point(ThreadFunction entry_point) { _entry_point = entry_point; } | |
1426 | |
1427 public: | |
1428 | |
1429 // Frame iteration; calls the function f for all frames on the stack | |
1430 void frames_do(void f(frame*, const RegisterMap*)); | |
1431 | |
1432 // Memory operations | |
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1433 void oops_do(OopClosure* f, CodeBlobClosure* cf); |
0 | 1434 |
1435 // Sweeper operations | |
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1436 void nmethods_do(CodeBlobClosure* cf); |
0 | 1437 |
1438 // Memory management operations | |
1439 void gc_epilogue(); | |
1440 void gc_prologue(); | |
1441 | |
1442 // Misc. operations | |
1443 char* name() const { return (char*)get_thread_name(); } | |
1444 void print_on(outputStream* st) const; | |
1445 void print() const { print_on(tty); } | |
1446 void print_value(); | |
1447 void print_thread_state_on(outputStream* ) const PRODUCT_RETURN; | |
1448 void print_thread_state() const PRODUCT_RETURN; | |
1449 void print_on_error(outputStream* st, char* buf, int buflen) const; | |
1450 void verify(); | |
1451 const char* get_thread_name() const; | |
1452 private: | |
1453 // factor out low-level mechanics for use in both normal and error cases | |
1454 const char* get_thread_name_string(char* buf = NULL, int buflen = 0) const; | |
1455 public: | |
1456 const char* get_threadgroup_name() const; | |
1457 const char* get_parent_name() const; | |
1458 | |
1459 // Accessing frames | |
1460 frame last_frame() { | |
1461 _anchor.make_walkable(this); | |
1462 return pd_last_frame(); | |
1463 } | |
1464 javaVFrame* last_java_vframe(RegisterMap* reg_map); | |
1465 | |
1466 // Returns method at 'depth' java or native frames down the stack | |
1467 // Used for security checks | |
1468 klassOop security_get_caller_class(int depth); | |
1469 | |
1470 // Print stack trace in external format | |
1471 void print_stack_on(outputStream* st); | |
1472 void print_stack() { print_stack_on(tty); } | |
1473 | |
1474 // Print stack traces in various internal formats | |
1475 void trace_stack() PRODUCT_RETURN; | |
1476 void trace_stack_from(vframe* start_vf) PRODUCT_RETURN; | |
1477 void trace_frames() PRODUCT_RETURN; | |
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1478 void trace_oops() PRODUCT_RETURN; |
0 | 1479 |
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1480 // Print an annotated view of the stack frames |
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1481 void print_frame_layout(int depth = 0, bool validate_only = false) NOT_DEBUG_RETURN; |
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1482 void validate_frame_layout() { |
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1483 print_frame_layout(0, true); |
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1484 } |
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1485 |
0 | 1486 // Returns the number of stack frames on the stack |
1487 int depth() const; | |
1488 | |
1489 // Function for testing deoptimization | |
1490 void deoptimize(); | |
1491 void make_zombies(); | |
1492 | |
1493 void deoptimized_wrt_marked_nmethods(); | |
1494 | |
1495 // Profiling operation (see fprofile.cpp) | |
1496 public: | |
1497 bool profile_last_Java_frame(frame* fr); | |
1498 | |
1499 private: | |
1500 ThreadProfiler* _thread_profiler; | |
1501 private: | |
1502 friend class FlatProfiler; // uses both [gs]et_thread_profiler. | |
1503 friend class FlatProfilerTask; // uses get_thread_profiler. | |
1504 friend class ThreadProfilerMark; // uses get_thread_profiler. | |
1505 ThreadProfiler* get_thread_profiler() { return _thread_profiler; } | |
1506 ThreadProfiler* set_thread_profiler(ThreadProfiler* tp) { | |
1507 ThreadProfiler* result = _thread_profiler; | |
1508 _thread_profiler = tp; | |
1509 return result; | |
1510 } | |
1511 | |
6197 | 1512 // NMT (Native memory tracking) support. |
1513 // This flag helps NMT to determine if this JavaThread will be blocked | |
1514 // at safepoint. If not, ThreadCritical is needed for writing memory records. | |
1515 // JavaThread is only safepoint visible when it is in Threads' thread list, | |
1516 // it is not visible until it is added to the list and becomes invisible | |
1517 // once it is removed from the list. | |
1518 public: | |
1519 bool is_safepoint_visible() const { return _safepoint_visible; } | |
1520 void set_safepoint_visible(bool visible) { _safepoint_visible = visible; } | |
1521 private: | |
1522 bool _safepoint_visible; | |
1523 | |
0 | 1524 // Static operations |
1525 public: | |
1526 // Returns the running thread as a JavaThread | |
1527 static inline JavaThread* current(); | |
1528 | |
1529 // Returns the active Java thread. Do not use this if you know you are calling | |
1530 // from a JavaThread, as it's slower than JavaThread::current. If called from | |
1531 // the VMThread, it also returns the JavaThread that instigated the VMThread's | |
1532 // operation. You may not want that either. | |
1533 static JavaThread* active(); | |
1534 | |
1535 inline CompilerThread* as_CompilerThread(); | |
1536 | |
1537 public: | |
1538 virtual void run(); | |
1539 void thread_main_inner(); | |
1540 | |
1541 private: | |
1542 // PRIVILEGED STACK | |
1543 PrivilegedElement* _privileged_stack_top; | |
1544 GrowableArray<oop>* _array_for_gc; | |
1545 public: | |
1546 | |
1547 // Returns the privileged_stack information. | |
1548 PrivilegedElement* privileged_stack_top() const { return _privileged_stack_top; } | |
1549 void set_privileged_stack_top(PrivilegedElement *e) { _privileged_stack_top = e; } | |
1550 void register_array_for_gc(GrowableArray<oop>* array) { _array_for_gc = array; } | |
1551 | |
1552 public: | |
1553 // Thread local information maintained by JVMTI. | |
1554 void set_jvmti_thread_state(JvmtiThreadState *value) { _jvmti_thread_state = value; } | |
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1555 // A JvmtiThreadState is lazily allocated. This jvmti_thread_state() |
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1556 // getter is used to get this JavaThread's JvmtiThreadState if it has |
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1557 // one which means NULL can be returned. JvmtiThreadState::state_for() |
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1558 // is used to get the specified JavaThread's JvmtiThreadState if it has |
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1559 // one or it allocates a new JvmtiThreadState for the JavaThread and |
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1560 // returns it. JvmtiThreadState::state_for() will return NULL only if |
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1561 // the specified JavaThread is exiting. |
0 | 1562 JvmtiThreadState *jvmti_thread_state() const { return _jvmti_thread_state; } |
1563 static ByteSize jvmti_thread_state_offset() { return byte_offset_of(JavaThread, _jvmti_thread_state); } | |
1564 void set_jvmti_get_loaded_classes_closure(JvmtiGetLoadedClassesClosure* value) { _jvmti_get_loaded_classes_closure = value; } | |
1565 JvmtiGetLoadedClassesClosure* get_jvmti_get_loaded_classes_closure() const { return _jvmti_get_loaded_classes_closure; } | |
1566 | |
1567 // JVMTI PopFrame support | |
1568 // Setting and clearing popframe_condition | |
1569 // All of these enumerated values are bits. popframe_pending | |
1570 // indicates that a PopFrame() has been requested and not yet been | |
1571 // completed. popframe_processing indicates that that PopFrame() is in | |
1572 // the process of being completed. popframe_force_deopt_reexecution_bit | |
1573 // indicates that special handling is required when returning to a | |
1574 // deoptimized caller. | |
1575 enum PopCondition { | |
1576 popframe_inactive = 0x00, | |
1577 popframe_pending_bit = 0x01, | |
1578 popframe_processing_bit = 0x02, | |
1579 popframe_force_deopt_reexecution_bit = 0x04 | |
1580 }; | |
1581 PopCondition popframe_condition() { return (PopCondition) _popframe_condition; } | |
1582 void set_popframe_condition(PopCondition c) { _popframe_condition = c; } | |
1583 void set_popframe_condition_bit(PopCondition c) { _popframe_condition |= c; } | |
1584 void clear_popframe_condition() { _popframe_condition = popframe_inactive; } | |
1585 static ByteSize popframe_condition_offset() { return byte_offset_of(JavaThread, _popframe_condition); } | |
1586 bool has_pending_popframe() { return (popframe_condition() & popframe_pending_bit) != 0; } | |
1587 bool popframe_forcing_deopt_reexecution() { return (popframe_condition() & popframe_force_deopt_reexecution_bit) != 0; } | |
1588 void clear_popframe_forcing_deopt_reexecution() { _popframe_condition &= ~popframe_force_deopt_reexecution_bit; } | |
1589 #ifdef CC_INTERP | |
1590 bool pop_frame_pending(void) { return ((_popframe_condition & popframe_pending_bit) != 0); } | |
1591 void clr_pop_frame_pending(void) { _popframe_condition = popframe_inactive; } | |
1592 bool pop_frame_in_process(void) { return ((_popframe_condition & popframe_processing_bit) != 0); } | |
1593 void set_pop_frame_in_process(void) { _popframe_condition |= popframe_processing_bit; } | |
1594 void clr_pop_frame_in_process(void) { _popframe_condition &= ~popframe_processing_bit; } | |
1595 #endif | |
1596 | |
1597 private: | |
1598 // Saved incoming arguments to popped frame. | |
1599 // Used only when popped interpreted frame returns to deoptimized frame. | |
1600 void* _popframe_preserved_args; | |
1601 int _popframe_preserved_args_size; | |
1602 | |
1603 public: | |
1604 void popframe_preserve_args(ByteSize size_in_bytes, void* start); | |
1605 void* popframe_preserved_args(); | |
1606 ByteSize popframe_preserved_args_size(); | |
1607 WordSize popframe_preserved_args_size_in_words(); | |
1608 void popframe_free_preserved_args(); | |
1609 | |
1610 | |
1611 private: | |
1612 JvmtiThreadState *_jvmti_thread_state; | |
1613 JvmtiGetLoadedClassesClosure* _jvmti_get_loaded_classes_closure; | |
1614 | |
1615 // Used by the interpreter in fullspeed mode for frame pop, method | |
1616 // entry, method exit and single stepping support. This field is | |
1617 // only set to non-zero by the VM_EnterInterpOnlyMode VM operation. | |
1618 // It can be set to zero asynchronously (i.e., without a VM operation | |
1619 // or a lock) so we have to be very careful. | |
1620 int _interp_only_mode; | |
1621 | |
1622 public: | |
1623 // used by the interpreter for fullspeed debugging support (see above) | |
1624 static ByteSize interp_only_mode_offset() { return byte_offset_of(JavaThread, _interp_only_mode); } | |
1625 bool is_interp_only_mode() { return (_interp_only_mode != 0); } | |
1626 int get_interp_only_mode() { return _interp_only_mode; } | |
1627 void increment_interp_only_mode() { ++_interp_only_mode; } | |
1628 void decrement_interp_only_mode() { --_interp_only_mode; } | |
1629 | |
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1630 // support for cached flag that indicates whether exceptions need to be posted for this thread |
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1631 // if this is false, we can avoid deoptimizing when events are thrown |
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1632 // this gets set to reflect whether jvmtiExport::post_exception_throw would actually do anything |
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1633 private: |
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1634 int _should_post_on_exceptions_flag; |
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1635 |
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1636 public: |
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1637 int should_post_on_exceptions_flag() { return _should_post_on_exceptions_flag; } |
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1638 void set_should_post_on_exceptions_flag(int val) { _should_post_on_exceptions_flag = val; } |
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1639 |
0 | 1640 private: |
1641 ThreadStatistics *_thread_stat; | |
1642 | |
1643 public: | |
1644 ThreadStatistics* get_thread_stat() const { return _thread_stat; } | |
1645 | |
1646 // Return a blocker object for which this thread is blocked parking. | |
1647 oop current_park_blocker(); | |
1648 | |
1649 private: | |
1650 static size_t _stack_size_at_create; | |
1651 | |
1652 public: | |
1653 static inline size_t stack_size_at_create(void) { | |
1654 return _stack_size_at_create; | |
1655 } | |
1656 static inline void set_stack_size_at_create(size_t value) { | |
1657 _stack_size_at_create = value; | |
1658 } | |
1659 | |
342 | 1660 #ifndef SERIALGC |
1661 // SATB marking queue support | |
1662 ObjPtrQueue& satb_mark_queue() { return _satb_mark_queue; } | |
1663 static SATBMarkQueueSet& satb_mark_queue_set() { | |
1664 return _satb_mark_queue_set; | |
1665 } | |
1666 | |
1667 // Dirty card queue support | |
1668 DirtyCardQueue& dirty_card_queue() { return _dirty_card_queue; } | |
1669 static DirtyCardQueueSet& dirty_card_queue_set() { | |
1670 return _dirty_card_queue_set; | |
1671 } | |
1672 #endif // !SERIALGC | |
1673 | |
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1674 // This method initializes the SATB and dirty card queues before a |
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1675 // JavaThread is added to the Java thread list. Right now, we don't |
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1676 // have to do anything to the dirty card queue (it should have been |
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1677 // activated when the thread was created), but we have to activate |
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1678 // the SATB queue if the thread is created while a marking cycle is |
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1679 // in progress. The activation / de-activation of the SATB queues at |
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1680 // the beginning / end of a marking cycle is done during safepoints |
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1681 // so we have to make sure this method is called outside one to be |
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1682 // able to safely read the active field of the SATB queue set. Right |
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1683 // now, it is called just before the thread is added to the Java |
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1684 // thread list in the Threads::add() method. That method is holding |
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1685 // the Threads_lock which ensures we are outside a safepoint. We |
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1686 // cannot do the obvious and set the active field of the SATB queue |
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1687 // when the thread is created given that, in some cases, safepoints |
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1688 // might happen between the JavaThread constructor being called and the |
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1689 // thread being added to the Java thread list (an example of this is |
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1690 // when the structure for the DestroyJavaVM thread is created). |
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1691 #ifndef SERIALGC |
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1692 void initialize_queues(); |
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1693 #else // !SERIALGC |
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1694 void initialize_queues() { } |
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1695 #endif // !SERIALGC |
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1696 |
0 | 1697 // Machine dependent stuff |
1972 | 1698 #ifdef TARGET_OS_ARCH_linux_x86 |
1699 # include "thread_linux_x86.hpp" | |
1700 #endif | |
1701 #ifdef TARGET_OS_ARCH_linux_sparc | |
1702 # include "thread_linux_sparc.hpp" | |
1703 #endif | |
1704 #ifdef TARGET_OS_ARCH_linux_zero | |
1705 # include "thread_linux_zero.hpp" | |
1706 #endif | |
1707 #ifdef TARGET_OS_ARCH_solaris_x86 | |
1708 # include "thread_solaris_x86.hpp" | |
1709 #endif | |
1710 #ifdef TARGET_OS_ARCH_solaris_sparc | |
1711 # include "thread_solaris_sparc.hpp" | |
1712 #endif | |
1713 #ifdef TARGET_OS_ARCH_windows_x86 | |
1714 # include "thread_windows_x86.hpp" | |
1715 #endif | |
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1716 #ifdef TARGET_OS_ARCH_linux_arm |
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1717 # include "thread_linux_arm.hpp" |
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1718 #endif |
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1719 #ifdef TARGET_OS_ARCH_linux_ppc |
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1720 # include "thread_linux_ppc.hpp" |
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1721 #endif |
3960 | 1722 #ifdef TARGET_OS_ARCH_bsd_x86 |
1723 # include "thread_bsd_x86.hpp" | |
1724 #endif | |
1725 #ifdef TARGET_OS_ARCH_bsd_zero | |
1726 # include "thread_bsd_zero.hpp" | |
1727 #endif | |
1972 | 1728 |
0 | 1729 |
1730 public: | |
1731 void set_blocked_on_compilation(bool value) { | |
1732 _blocked_on_compilation = value; | |
1733 } | |
1734 | |
1735 bool blocked_on_compilation() { | |
1736 return _blocked_on_compilation; | |
1737 } | |
1738 protected: | |
1739 bool _blocked_on_compilation; | |
1740 | |
1741 | |
1742 // JSR166 per-thread parker | |
1743 private: | |
1744 Parker* _parker; | |
1745 public: | |
1746 Parker* parker() { return _parker; } | |
1747 | |
1748 // Biased locking support | |
1749 private: | |
1750 GrowableArray<MonitorInfo*>* _cached_monitor_info; | |
1751 public: | |
1752 GrowableArray<MonitorInfo*>* cached_monitor_info() { return _cached_monitor_info; } | |
1753 void set_cached_monitor_info(GrowableArray<MonitorInfo*>* info) { _cached_monitor_info = info; } | |
1754 | |
1755 // clearing/querying jni attach status | |
4006 | 1756 bool is_attaching_via_jni() const { return _jni_attach_state == _attaching_via_jni; } |
1757 bool has_attached_via_jni() const { return is_attaching_via_jni() || _jni_attach_state == _attached_via_jni; } | |
1758 void set_done_attaching_via_jni() { _jni_attach_state = _attached_via_jni; OrderAccess::fence(); } | |
342 | 1759 private: |
1760 // This field is used to determine if a thread has claimed | |
1761 // a par_id: it is -1 if the thread has not claimed a par_id; | |
1762 // otherwise its value is the par_id that has been claimed. | |
1763 int _claimed_par_id; | |
1764 public: | |
1765 int get_claimed_par_id() { return _claimed_par_id; } | |
1766 void set_claimed_par_id(int id) { _claimed_par_id = id;} | |
0 | 1767 }; |
1768 | |
1769 // Inline implementation of JavaThread::current | |
1770 inline JavaThread* JavaThread::current() { | |
1771 Thread* thread = ThreadLocalStorage::thread(); | |
1772 assert(thread != NULL && thread->is_Java_thread(), "just checking"); | |
1773 return (JavaThread*)thread; | |
1774 } | |
1775 | |
1776 inline CompilerThread* JavaThread::as_CompilerThread() { | |
1777 assert(is_Compiler_thread(), "just checking"); | |
1778 return (CompilerThread*)this; | |
1779 } | |
1780 | |
1781 inline bool JavaThread::stack_yellow_zone_disabled() { | |
1782 return _stack_guard_state == stack_guard_yellow_disabled; | |
1783 } | |
1784 | |
1785 inline bool JavaThread::stack_yellow_zone_enabled() { | |
1786 #ifdef ASSERT | |
1787 if (os::uses_stack_guard_pages()) { | |
1788 assert(_stack_guard_state != stack_guard_unused, "guard pages must be in use"); | |
1789 } | |
1790 #endif | |
1791 return _stack_guard_state == stack_guard_enabled; | |
1792 } | |
1793 | |
1794 inline size_t JavaThread::stack_available(address cur_sp) { | |
1795 // This code assumes java stacks grow down | |
1796 address low_addr; // Limit on the address for deepest stack depth | |
1797 if ( _stack_guard_state == stack_guard_unused) { | |
1798 low_addr = stack_base() - stack_size(); | |
1799 } else { | |
1800 low_addr = stack_yellow_zone_base(); | |
1801 } | |
1802 return cur_sp > low_addr ? cur_sp - low_addr : 0; | |
1803 } | |
1804 | |
1805 // A thread used for Compilation. | |
1806 class CompilerThread : public JavaThread { | |
1807 friend class VMStructs; | |
1808 private: | |
1809 CompilerCounters* _counters; | |
1810 | |
1811 CompileLog* _log; | |
1812 CompileTask* _task; | |
1813 CompileQueue* _queue; | |
1814 | |
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0 | 1816 public: |
1817 | |
1818 static CompilerThread* current(); | |
1819 | |
1820 CompilerThread(CompileQueue* queue, CompilerCounters* counters); | |
1821 | |
1822 bool is_Compiler_thread() const { return true; } | |
1823 // Hide this compiler thread from external view. | |
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1824 // (thomaswue) For Graal, the compiler thread should be visible. |
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1825 bool is_hidden_from_external_view() const { |
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1826 #ifdef GRAAL |
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1827 return !DebugGraal; |
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1828 #else |
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1829 return true; |
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1830 #endif |
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1831 } |
0 | 1832 |
1833 CompileQueue* queue() { return _queue; } | |
1834 CompilerCounters* counters() { return _counters; } | |
1835 | |
1836 // Get/set the thread's logging information | |
1837 CompileLog* log() { return _log; } | |
1838 void init_log(CompileLog* log) { | |
1839 // Set once, for good. | |
1840 assert(_log == NULL, "set only once"); | |
1841 _log = log; | |
1842 } | |
1843 | |
1844 #ifndef PRODUCT | |
1845 private: | |
1846 IdealGraphPrinter *_ideal_graph_printer; | |
1847 public: | |
1848 IdealGraphPrinter *ideal_graph_printer() { return _ideal_graph_printer; } | |
1849 void set_ideal_graph_printer(IdealGraphPrinter *n) { _ideal_graph_printer = n; } | |
1850 #endif | |
1851 | |
1852 // Get/set the thread's current task | |
1853 CompileTask* task() { return _task; } | |
1854 void set_task(CompileTask* task) { _task = task; } | |
1855 }; | |
1856 | |
1857 inline CompilerThread* CompilerThread::current() { | |
1858 return JavaThread::current()->as_CompilerThread(); | |
1859 } | |
1860 | |
1861 | |
1862 // The active thread queue. It also keeps track of the current used | |
1863 // thread priorities. | |
1864 class Threads: AllStatic { | |
1865 friend class VMStructs; | |
1866 private: | |
1867 static JavaThread* _thread_list; | |
1868 static int _number_of_threads; | |
1869 static int _number_of_non_daemon_threads; | |
1870 static int _return_code; | |
1871 | |
1872 public: | |
1873 // Thread management | |
1874 // force_daemon is a concession to JNI, where we may need to add a | |
1875 // thread to the thread list before allocating its thread object | |
1876 static void add(JavaThread* p, bool force_daemon = false); | |
1877 static void remove(JavaThread* p); | |
1878 static bool includes(JavaThread* p); | |
1879 static JavaThread* first() { return _thread_list; } | |
1880 static void threads_do(ThreadClosure* tc); | |
1881 | |
1882 // Initializes the vm and creates the vm thread | |
1883 static jint create_vm(JavaVMInitArgs* args, bool* canTryAgain); | |
1884 static void convert_vm_init_libraries_to_agents(); | |
1885 static void create_vm_init_libraries(); | |
1886 static void create_vm_init_agents(); | |
1887 static void shutdown_vm_agents(); | |
1888 static bool destroy_vm(); | |
1889 // Supported VM versions via JNI | |
1890 // Includes JNI_VERSION_1_1 | |
1891 static jboolean is_supported_jni_version_including_1_1(jint version); | |
1892 // Does not include JNI_VERSION_1_1 | |
1893 static jboolean is_supported_jni_version(jint version); | |
1894 | |
1895 // Garbage collection | |
1896 static void follow_other_roots(void f(oop*)); | |
1897 | |
1898 // Apply "f->do_oop" to all root oops in all threads. | |
1899 // This version may only be called by sequential code. | |
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1900 static void oops_do(OopClosure* f, CodeBlobClosure* cf); |
0 | 1901 // This version may be called by sequential or parallel code. |
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1902 static void possibly_parallel_oops_do(OopClosure* f, CodeBlobClosure* cf); |
0 | 1903 // This creates a list of GCTasks, one per thread. |
1904 static void create_thread_roots_tasks(GCTaskQueue* q); | |
1905 // This creates a list of GCTasks, one per thread, for marking objects. | |
1906 static void create_thread_roots_marking_tasks(GCTaskQueue* q); | |
1907 | |
1908 // Apply "f->do_oop" to roots in all threads that | |
1909 // are part of compiled frames | |
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1910 static void compiled_frame_oops_do(OopClosure* f, CodeBlobClosure* cf); |
0 | 1911 |
1912 static void convert_hcode_pointers(); | |
1913 static void restore_hcode_pointers(); | |
1914 | |
1915 // Sweeper | |
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1916 static void nmethods_do(CodeBlobClosure* cf); |
0 | 1917 |
1918 static void gc_epilogue(); | |
1919 static void gc_prologue(); | |
1920 | |
1921 // Verification | |
1922 static void verify(); | |
1923 static void print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks); | |
1924 static void print(bool print_stacks, bool internal_format) { | |
1925 // this function is only used by debug.cpp | |
1926 print_on(tty, print_stacks, internal_format, false /* no concurrent lock printed */); | |
1927 } | |
1928 static void print_on_error(outputStream* st, Thread* current, char* buf, int buflen); | |
1929 | |
1930 // Get Java threads that are waiting to enter a monitor. If doLock | |
1931 // is true, then Threads_lock is grabbed as needed. Otherwise, the | |
1932 // VM needs to be at a safepoint. | |
1933 static GrowableArray<JavaThread*>* get_pending_threads(int count, | |
1934 address monitor, bool doLock); | |
1935 | |
1936 // Get owning Java thread from the monitor's owner field. If doLock | |
1937 // is true, then Threads_lock is grabbed as needed. Otherwise, the | |
1938 // VM needs to be at a safepoint. | |
1939 static JavaThread *owning_thread_from_monitor_owner(address owner, | |
1940 bool doLock); | |
1941 | |
1942 // Number of threads on the active threads list | |
1943 static int number_of_threads() { return _number_of_threads; } | |
1944 // Number of non-daemon threads on the active threads list | |
1945 static int number_of_non_daemon_threads() { return _number_of_non_daemon_threads; } | |
1946 | |
1947 // Deoptimizes all frames tied to marked nmethods | |
1948 static void deoptimized_wrt_marked_nmethods(); | |
1949 | |
1950 }; | |
1951 | |
1952 | |
1953 // Thread iterator | |
1954 class ThreadClosure: public StackObj { | |
1955 public: | |
1956 virtual void do_thread(Thread* thread) = 0; | |
1957 }; | |
1958 | |
1959 class SignalHandlerMark: public StackObj { | |
1960 private: | |
1961 Thread* _thread; | |
1962 public: | |
1963 SignalHandlerMark(Thread* t) { | |
1964 _thread = t; | |
1965 if (_thread) _thread->enter_signal_handler(); | |
1966 } | |
1967 ~SignalHandlerMark() { | |
1968 if (_thread) _thread->leave_signal_handler(); | |
1969 _thread = NULL; | |
1970 } | |
1971 }; | |
1972 | |
1972 | 1973 |
1974 #endif // SHARE_VM_RUNTIME_THREAD_HPP |