Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/thread.hpp @ 6999:679e6584c177
added ScopedDebugValue to add values of interest to hs_err crash logs
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 21 Nov 2012 19:23:43 +0100 |
parents | e522a00b91aa |
children | 291ffc492eb6 |
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" | |
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44 |
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45 #if INCLUDE_NMT |
6197 | 46 #include "services/memRecorder.hpp" |
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47 #endif // INCLUDE_NMT |
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48 |
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49 #include "trace/tracing.hpp" |
1972 | 50 #include "utilities/exceptions.hpp" |
51 #include "utilities/top.hpp" | |
52 #ifndef SERIALGC | |
53 #include "gc_implementation/g1/dirtyCardQueue.hpp" | |
54 #include "gc_implementation/g1/satbQueue.hpp" | |
55 #endif | |
56 #ifdef ZERO | |
57 #ifdef TARGET_ARCH_zero | |
58 # include "stack_zero.hpp" | |
59 #endif | |
60 #endif | |
61 | |
0 | 62 class ThreadSafepointState; |
63 class ThreadProfiler; | |
64 | |
65 class JvmtiThreadState; | |
66 class JvmtiGetLoadedClassesClosure; | |
67 class ThreadStatistics; | |
68 class ConcurrentLocksDump; | |
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69 class ParkEvent; |
1878 | 70 class Parker; |
0 | 71 |
72 class ciEnv; | |
73 class CompileThread; | |
74 class CompileLog; | |
75 class CompileTask; | |
76 class CompileQueue; | |
77 class CompilerCounters; | |
78 class vframeArray; | |
79 | |
80 class DeoptResourceMark; | |
81 class jvmtiDeferredLocalVariableSet; | |
82 | |
83 class GCTaskQueue; | |
84 class ThreadClosure; | |
85 class IdealGraphPrinter; | |
86 | |
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87 class WorkerThread; |
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88 |
0 | 89 // Class hierarchy |
90 // - Thread | |
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91 // - NamedThread |
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92 // - VMThread |
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93 // - ConcurrentGCThread |
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94 // - WorkerThread |
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95 // - GangWorker |
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96 // - GCTaskThread |
0 | 97 // - JavaThread |
98 // - WatcherThread | |
99 | |
100 class Thread: public ThreadShadow { | |
101 friend class VMStructs; | |
102 private: | |
103 // Exception handling | |
104 // (Note: _pending_exception and friends are in ThreadShadow) | |
105 //oop _pending_exception; // pending exception for current thread | |
106 // const char* _exception_file; // file information for exception (debugging only) | |
107 // int _exception_line; // line information for exception (debugging only) | |
6197 | 108 protected: |
0 | 109 // Support for forcing alignment of thread objects for biased locking |
110 void* _real_malloc_address; | |
111 public: | |
6197 | 112 void* operator new(size_t size) { return allocate(size, true); } |
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113 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) { return allocate(size, false); } |
0 | 114 void operator delete(void* p); |
6197 | 115 |
116 protected: | |
117 static void* allocate(size_t size, bool throw_excpt, MEMFLAGS flags = mtThread); | |
0 | 118 private: |
119 | |
120 // *************************************************************** | |
121 // Suspend and resume support | |
122 // *************************************************************** | |
123 // | |
124 // VM suspend/resume no longer exists - it was once used for various | |
125 // things including safepoints but was deprecated and finally removed | |
126 // in Java 7. Because VM suspension was considered "internal" Java-level | |
127 // suspension was considered "external", and this legacy naming scheme | |
128 // remains. | |
129 // | |
130 // External suspend/resume requests come from JVM_SuspendThread, | |
131 // JVM_ResumeThread, JVMTI SuspendThread, and finally JVMTI | |
132 // ResumeThread. External | |
133 // suspend requests cause _external_suspend to be set and external | |
134 // resume requests cause _external_suspend to be cleared. | |
135 // External suspend requests do not nest on top of other external | |
136 // suspend requests. The higher level APIs reject suspend requests | |
137 // for already suspended threads. | |
138 // | |
139 // The external_suspend | |
140 // flag is checked by has_special_runtime_exit_condition() and java thread | |
141 // will self-suspend when handle_special_runtime_exit_condition() is | |
142 // called. Most uses of the _thread_blocked state in JavaThreads are | |
143 // considered the same as being externally suspended; if the blocking | |
144 // condition lifts, the JavaThread will self-suspend. Other places | |
145 // where VM checks for external_suspend include: | |
146 // + mutex granting (do not enter monitors when thread is suspended) | |
147 // + state transitions from _thread_in_native | |
148 // | |
149 // In general, java_suspend() does not wait for an external suspend | |
150 // request to complete. When it returns, the only guarantee is that | |
151 // the _external_suspend field is true. | |
152 // | |
153 // wait_for_ext_suspend_completion() is used to wait for an external | |
154 // suspend request to complete. External suspend requests are usually | |
155 // followed by some other interface call that requires the thread to | |
156 // be quiescent, e.g., GetCallTrace(). By moving the "wait time" into | |
157 // the interface that requires quiescence, we give the JavaThread a | |
158 // chance to self-suspend before we need it to be quiescent. This | |
159 // improves overall suspend/query performance. | |
160 // | |
161 // _suspend_flags controls the behavior of java_ suspend/resume. | |
162 // It must be set under the protection of SR_lock. Read from the flag is | |
163 // OK without SR_lock as long as the value is only used as a hint. | |
164 // (e.g., check _external_suspend first without lock and then recheck | |
165 // inside SR_lock and finish the suspension) | |
166 // | |
167 // _suspend_flags is also overloaded for other "special conditions" so | |
168 // that a single check indicates whether any special action is needed | |
169 // eg. for async exceptions. | |
170 // ------------------------------------------------------------------- | |
171 // Notes: | |
172 // 1. The suspend/resume logic no longer uses ThreadState in OSThread | |
173 // but we still update its value to keep other part of the system (mainly | |
174 // JVMTI) happy. ThreadState is legacy code (see notes in | |
175 // osThread.hpp). | |
176 // | |
177 // 2. It would be more natural if set_external_suspend() is private and | |
178 // part of java_suspend(), but that probably would affect the suspend/query | |
179 // performance. Need more investigation on this. | |
180 // | |
181 | |
182 // suspend/resume lock: used for self-suspend | |
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183 Monitor* _SR_lock; |
0 | 184 |
185 protected: | |
186 enum SuspendFlags { | |
187 // NOTE: avoid using the sign-bit as cc generates different test code | |
188 // when the sign-bit is used, and sometimes incorrectly - see CR 6398077 | |
189 | |
190 _external_suspend = 0x20000000U, // thread is asked to self suspend | |
191 _ext_suspended = 0x40000000U, // thread has self-suspended | |
192 _deopt_suspend = 0x10000000U, // thread needs to self suspend for deopt | |
193 | |
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194 _has_async_exception = 0x00000001U, // there is a pending async exception |
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195 _critical_native_unlock = 0x00000002U // Must call back to unlock JNI critical lock |
0 | 196 }; |
197 | |
198 // various suspension related flags - atomically updated | |
199 // overloaded for async exception checking in check_special_condition_for_native_trans. | |
200 volatile uint32_t _suspend_flags; | |
201 | |
202 private: | |
203 int _num_nested_signal; | |
204 | |
205 public: | |
206 void enter_signal_handler() { _num_nested_signal++; } | |
207 void leave_signal_handler() { _num_nested_signal--; } | |
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208 bool is_inside_signal_handler() const { return _num_nested_signal > 0; } |
0 | 209 |
210 private: | |
211 // Debug tracing | |
212 static void trace(const char* msg, const Thread* const thread) PRODUCT_RETURN; | |
213 | |
214 // Active_handles points to a block of handles | |
215 JNIHandleBlock* _active_handles; | |
216 | |
217 // One-element thread local free list | |
218 JNIHandleBlock* _free_handle_block; | |
219 | |
220 // Point to the last handle mark | |
221 HandleMark* _last_handle_mark; | |
222 | |
223 // The parity of the last strong_roots iteration in which this thread was | |
224 // claimed as a task. | |
225 jint _oops_do_parity; | |
226 | |
227 public: | |
228 void set_last_handle_mark(HandleMark* mark) { _last_handle_mark = mark; } | |
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229 HandleMark* last_handle_mark() const { return _last_handle_mark; } |
0 | 230 private: |
231 | |
232 // debug support for checking if code does allow safepoints or not | |
233 // GC points in the VM can happen because of allocation, invoking a VM operation, or blocking on | |
234 // mutex, or blocking on an object synchronizer (Java locking). | |
235 // If !allow_safepoint(), then an assertion failure will happen in any of the above cases | |
236 // If !allow_allocation(), then an assertion failure will happen during allocation | |
237 // (Hence, !allow_safepoint() => !allow_allocation()). | |
238 // | |
239 // The two classes No_Safepoint_Verifier and No_Allocation_Verifier are used to set these counters. | |
240 // | |
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241 NOT_PRODUCT(int _allow_safepoint_count;) // If 0, thread allow a safepoint to happen |
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242 debug_only (int _allow_allocation_count;) // If 0, the thread is allowed to allocate oops. |
0 | 243 |
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244 // Used by SkipGCALot class. |
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245 NOT_PRODUCT(bool _skip_gcalot;) // Should we elide gc-a-lot? |
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246 |
0 | 247 // Record when GC is locked out via the GC_locker mechanism |
248 CHECK_UNHANDLED_OOPS_ONLY(int _gc_locked_out_count;) | |
249 | |
250 friend class No_Alloc_Verifier; | |
251 friend class No_Safepoint_Verifier; | |
252 friend class Pause_No_Safepoint_Verifier; | |
253 friend class ThreadLocalStorage; | |
254 friend class GC_locker; | |
255 | |
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256 ThreadLocalAllocBuffer _tlab; // Thread-local eden |
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257 jlong _allocated_bytes; // Cumulative number of bytes allocated on |
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258 // the Java heap |
0 | 259 |
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260 TRACE_BUFFER _trace_buffer; // Thread-local buffer for tracing |
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261 |
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262 int _vm_operation_started_count; // VM_Operation support |
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263 int _vm_operation_completed_count; // VM_Operation support |
0 | 264 |
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265 ObjectMonitor* _current_pending_monitor; // ObjectMonitor this thread |
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266 // is waiting to lock |
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267 bool _current_pending_monitor_is_from_java; // locking is from Java code |
0 | 268 |
269 // ObjectMonitor on which this thread called Object.wait() | |
270 ObjectMonitor* _current_waiting_monitor; | |
271 | |
272 // Private thread-local objectmonitor list - a simple cache organized as a SLL. | |
273 public: | |
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274 ObjectMonitor* omFreeList; |
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275 int omFreeCount; // length of omFreeList |
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276 int omFreeProvision; // reload chunk size |
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277 ObjectMonitor* omInUseList; // SLL to track monitors in circulation |
1587 | 278 int omInUseCount; // length of omInUseList |
0 | 279 |
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280 #ifdef ASSERT |
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281 private: |
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282 bool _visited_for_critical_count; |
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283 |
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284 public: |
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285 void set_visited_for_critical_count(bool z) { _visited_for_critical_count = z; } |
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286 bool was_visited_for_critical_count() const { return _visited_for_critical_count; } |
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287 #endif |
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288 |
0 | 289 public: |
290 enum { | |
291 is_definitely_current_thread = true | |
292 }; | |
293 | |
294 // Constructor | |
295 Thread(); | |
296 virtual ~Thread(); | |
297 | |
298 // initializtion | |
299 void initialize_thread_local_storage(); | |
300 | |
301 // thread entry point | |
302 virtual void run(); | |
303 | |
304 // Testers | |
305 virtual bool is_VM_thread() const { return false; } | |
306 virtual bool is_Java_thread() const { return false; } | |
307 virtual bool is_Compiler_thread() const { return false; } | |
308 virtual bool is_hidden_from_external_view() const { return false; } | |
309 virtual bool is_jvmti_agent_thread() const { return false; } | |
310 // True iff the thread can perform GC operations at a safepoint. | |
311 // Generally will be true only of VM thread and parallel GC WorkGang | |
312 // threads. | |
313 virtual bool is_GC_task_thread() const { return false; } | |
314 virtual bool is_Watcher_thread() const { return false; } | |
315 virtual bool is_ConcurrentGC_thread() const { return false; } | |
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316 virtual bool is_Named_thread() const { return false; } |
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317 virtual bool is_Worker_thread() const { return false; } |
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318 |
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319 // Casts |
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320 virtual WorkerThread* as_Worker_thread() const { return NULL; } |
0 | 321 |
322 virtual char* name() const { return (char*)"Unknown thread"; } | |
323 | |
324 // Returns the current thread | |
325 static inline Thread* current(); | |
326 | |
327 // Common thread operations | |
328 static void set_priority(Thread* thread, ThreadPriority priority); | |
329 static ThreadPriority get_priority(const Thread* const thread); | |
330 static void start(Thread* thread); | |
331 static void interrupt(Thread* thr); | |
332 static bool is_interrupted(Thread* thr, bool clear_interrupted); | |
333 | |
4006 | 334 void set_native_thread_name(const char *name) { |
335 assert(Thread::current() == this, "set_native_thread_name can only be called on the current thread"); | |
336 os::set_native_thread_name(name); | |
337 } | |
338 | |
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339 ObjectMonitor** omInUseList_addr() { return (ObjectMonitor **)&omInUseList; } |
0 | 340 Monitor* SR_lock() const { return _SR_lock; } |
341 | |
342 bool has_async_exception() const { return (_suspend_flags & _has_async_exception) != 0; } | |
343 | |
344 void set_suspend_flag(SuspendFlags f) { | |
345 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); | |
346 uint32_t flags; | |
347 do { | |
348 flags = _suspend_flags; | |
349 } | |
350 while (Atomic::cmpxchg((jint)(flags | f), | |
351 (volatile jint*)&_suspend_flags, | |
352 (jint)flags) != (jint)flags); | |
353 } | |
354 void clear_suspend_flag(SuspendFlags f) { | |
355 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); | |
356 uint32_t flags; | |
357 do { | |
358 flags = _suspend_flags; | |
359 } | |
360 while (Atomic::cmpxchg((jint)(flags & ~f), | |
361 (volatile jint*)&_suspend_flags, | |
362 (jint)flags) != (jint)flags); | |
363 } | |
364 | |
365 void set_has_async_exception() { | |
366 set_suspend_flag(_has_async_exception); | |
367 } | |
368 void clear_has_async_exception() { | |
369 clear_suspend_flag(_has_async_exception); | |
370 } | |
371 | |
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372 bool do_critical_native_unlock() const { return (_suspend_flags & _critical_native_unlock) != 0; } |
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373 |
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374 void set_critical_native_unlock() { |
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375 set_suspend_flag(_critical_native_unlock); |
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376 } |
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377 void clear_critical_native_unlock() { |
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378 clear_suspend_flag(_critical_native_unlock); |
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379 } |
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380 |
0 | 381 // Support for Unhandled Oop detection |
382 #ifdef CHECK_UNHANDLED_OOPS | |
383 private: | |
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384 UnhandledOops* _unhandled_oops; |
0 | 385 public: |
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386 UnhandledOops* unhandled_oops() { return _unhandled_oops; } |
0 | 387 // Mark oop safe for gc. It may be stack allocated but won't move. |
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388 void allow_unhandled_oop(oop *op) { |
0 | 389 if (CheckUnhandledOops) unhandled_oops()->allow_unhandled_oop(op); |
390 } | |
391 // Clear oops at safepoint so crashes point to unhandled oop violator | |
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392 void clear_unhandled_oops() { |
0 | 393 if (CheckUnhandledOops) unhandled_oops()->clear_unhandled_oops(); |
394 } | |
395 bool is_gc_locked_out() { return _gc_locked_out_count > 0; } | |
396 #endif // CHECK_UNHANDLED_OOPS | |
397 | |
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398 #ifndef PRODUCT |
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399 bool skip_gcalot() { return _skip_gcalot; } |
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400 void set_skip_gcalot(bool v) { _skip_gcalot = v; } |
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401 #endif |
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402 |
0 | 403 public: |
404 // Installs a pending exception to be inserted later | |
405 static void send_async_exception(oop thread_oop, oop java_throwable); | |
406 | |
407 // Resource area | |
408 ResourceArea* resource_area() const { return _resource_area; } | |
409 void set_resource_area(ResourceArea* area) { _resource_area = area; } | |
410 | |
411 OSThread* osthread() const { return _osthread; } | |
412 void set_osthread(OSThread* thread) { _osthread = thread; } | |
413 | |
414 // JNI handle support | |
415 JNIHandleBlock* active_handles() const { return _active_handles; } | |
416 void set_active_handles(JNIHandleBlock* block) { _active_handles = block; } | |
417 JNIHandleBlock* free_handle_block() const { return _free_handle_block; } | |
418 void set_free_handle_block(JNIHandleBlock* block) { _free_handle_block = block; } | |
419 | |
420 // Internal handle support | |
421 HandleArea* handle_area() const { return _handle_area; } | |
422 void set_handle_area(HandleArea* area) { _handle_area = area; } | |
423 | |
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424 GrowableArray<Metadata*>* metadata_handles() const { return _metadata_handles; } |
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425 void set_metadata_handles(GrowableArray<Metadata*>* handles){ _metadata_handles = handles; } |
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426 |
0 | 427 // Thread-Local Allocation Buffer (TLAB) support |
428 ThreadLocalAllocBuffer& tlab() { return _tlab; } | |
429 void initialize_tlab() { | |
430 if (UseTLAB) { | |
431 tlab().initialize(); | |
432 } | |
433 } | |
434 | |
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435 jlong allocated_bytes() { return _allocated_bytes; } |
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436 void set_allocated_bytes(jlong value) { _allocated_bytes = value; } |
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437 void incr_allocated_bytes(jlong size) { _allocated_bytes += size; } |
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438 jlong cooked_allocated_bytes() { |
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439 jlong allocated_bytes = OrderAccess::load_acquire(&_allocated_bytes); |
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440 if (UseTLAB) { |
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441 size_t used_bytes = tlab().used_bytes(); |
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442 if ((ssize_t)used_bytes > 0) { |
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443 // More-or-less valid tlab. The load_acquire above should ensure |
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444 // that the result of the add is <= the instantaneous value |
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445 return allocated_bytes + used_bytes; |
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446 } |
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447 } |
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448 return allocated_bytes; |
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449 } |
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450 |
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451 TRACE_BUFFER trace_buffer() { return _trace_buffer; } |
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452 void set_trace_buffer(TRACE_BUFFER buf) { _trace_buffer = buf; } |
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453 |
0 | 454 // VM operation support |
455 int vm_operation_ticket() { return ++_vm_operation_started_count; } | |
456 int vm_operation_completed_count() { return _vm_operation_completed_count; } | |
457 void increment_vm_operation_completed_count() { _vm_operation_completed_count++; } | |
458 | |
459 // For tracking the heavyweight monitor the thread is pending on. | |
460 ObjectMonitor* current_pending_monitor() { | |
461 return _current_pending_monitor; | |
462 } | |
463 void set_current_pending_monitor(ObjectMonitor* monitor) { | |
464 _current_pending_monitor = monitor; | |
465 } | |
466 void set_current_pending_monitor_is_from_java(bool from_java) { | |
467 _current_pending_monitor_is_from_java = from_java; | |
468 } | |
469 bool current_pending_monitor_is_from_java() { | |
470 return _current_pending_monitor_is_from_java; | |
471 } | |
472 | |
473 // For tracking the ObjectMonitor on which this thread called Object.wait() | |
474 ObjectMonitor* current_waiting_monitor() { | |
475 return _current_waiting_monitor; | |
476 } | |
477 void set_current_waiting_monitor(ObjectMonitor* monitor) { | |
478 _current_waiting_monitor = monitor; | |
479 } | |
480 | |
481 // GC support | |
482 // Apply "f->do_oop" to all root oops in "this". | |
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483 // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames |
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484 virtual void oops_do(OopClosure* f, CodeBlobClosure* cf); |
0 | 485 |
486 // Handles the parallel case for the method below. | |
487 private: | |
488 bool claim_oops_do_par_case(int collection_parity); | |
489 public: | |
490 // Requires that "collection_parity" is that of the current strong roots | |
491 // iteration. If "is_par" is false, sets the parity of "this" to | |
492 // "collection_parity", and returns "true". If "is_par" is true, | |
493 // uses an atomic instruction to set the current threads parity to | |
494 // "collection_parity", if it is not already. Returns "true" iff the | |
495 // calling thread does the update, this indicates that the calling thread | |
496 // has claimed the thread's stack as a root groop in the current | |
497 // collection. | |
498 bool claim_oops_do(bool is_par, int collection_parity) { | |
499 if (!is_par) { | |
500 _oops_do_parity = collection_parity; | |
501 return true; | |
502 } else { | |
503 return claim_oops_do_par_case(collection_parity); | |
504 } | |
505 } | |
506 | |
507 // Sweeper support | |
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508 void nmethods_do(CodeBlobClosure* cf); |
0 | 509 |
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510 // jvmtiRedefineClasses support |
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511 void metadata_do(void f(Metadata*)); |
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512 |
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513 // Used by fast lock support |
0 | 514 virtual bool is_lock_owned(address adr) const; |
515 | |
516 // Check if address is in the stack of the thread (not just for locks). | |
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517 // Warning: the method can only be used on the running thread |
0 | 518 bool is_in_stack(address adr) const; |
519 | |
520 // Sets this thread as starting thread. Returns failure if thread | |
521 // creation fails due to lack of memory, too many threads etc. | |
522 bool set_as_starting_thread(); | |
523 | |
524 protected: | |
525 // OS data associated with the thread | |
526 OSThread* _osthread; // Platform-specific thread information | |
527 | |
528 // Thread local resource area for temporary allocation within the VM | |
529 ResourceArea* _resource_area; | |
530 | |
531 // Thread local handle area for allocation of handles within the VM | |
532 HandleArea* _handle_area; | |
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533 GrowableArray<Metadata*>* _metadata_handles; |
0 | 534 |
535 // Support for stack overflow handling, get_thread, etc. | |
536 address _stack_base; | |
537 size_t _stack_size; | |
538 uintptr_t _self_raw_id; // used by get_thread (mutable) | |
539 int _lgrp_id; | |
540 | |
541 public: | |
542 // Stack overflow support | |
543 address stack_base() const { assert(_stack_base != NULL,"Sanity check"); return _stack_base; } | |
544 | |
545 void set_stack_base(address base) { _stack_base = base; } | |
546 size_t stack_size() const { return _stack_size; } | |
547 void set_stack_size(size_t size) { _stack_size = size; } | |
548 void record_stack_base_and_size(); | |
549 | |
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550 bool on_local_stack(address adr) const { |
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551 /* QQQ this has knowledge of direction, ought to be a stack method */ |
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552 return (_stack_base >= adr && adr >= (_stack_base - _stack_size)); |
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553 } |
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554 |
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555 uintptr_t self_raw_id() { return _self_raw_id; } |
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556 void set_self_raw_id(uintptr_t value) { _self_raw_id = value; } |
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557 |
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558 int lgrp_id() const { return _lgrp_id; } |
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559 void set_lgrp_id(int value) { _lgrp_id = value; } |
0 | 560 |
561 // Printing | |
562 void print_on(outputStream* st) const; | |
563 void print() const { print_on(tty); } | |
564 virtual void print_on_error(outputStream* st, char* buf, int buflen) const; | |
565 | |
566 // Debug-only code | |
567 #ifdef ASSERT | |
568 private: | |
569 // Deadlock detection support for Mutex locks. List of locks own by thread. | |
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570 Monitor* _owned_locks; |
0 | 571 // Mutex::set_owner_implementation is the only place where _owned_locks is modified, |
572 // thus the friendship | |
573 friend class Mutex; | |
574 friend class Monitor; | |
575 | |
576 public: | |
577 void print_owned_locks_on(outputStream* st) const; | |
578 void print_owned_locks() const { print_owned_locks_on(tty); } | |
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579 Monitor* owned_locks() const { return _owned_locks; } |
0 | 580 bool owns_locks() const { return owned_locks() != NULL; } |
581 bool owns_locks_but_compiled_lock() const; | |
582 | |
583 // Deadlock detection | |
584 bool allow_allocation() { return _allow_allocation_count == 0; } | |
585 #endif | |
586 | |
587 void check_for_valid_safepoint_state(bool potential_vm_operation) PRODUCT_RETURN; | |
588 | |
589 private: | |
590 volatile int _jvmti_env_iteration_count; | |
591 | |
592 public: | |
593 void entering_jvmti_env_iteration() { ++_jvmti_env_iteration_count; } | |
594 void leaving_jvmti_env_iteration() { --_jvmti_env_iteration_count; } | |
595 bool is_inside_jvmti_env_iteration() { return _jvmti_env_iteration_count > 0; } | |
596 | |
597 // Code generation | |
598 static ByteSize exception_file_offset() { return byte_offset_of(Thread, _exception_file ); } | |
599 static ByteSize exception_line_offset() { return byte_offset_of(Thread, _exception_line ); } | |
600 static ByteSize active_handles_offset() { return byte_offset_of(Thread, _active_handles ); } | |
601 | |
602 static ByteSize stack_base_offset() { return byte_offset_of(Thread, _stack_base ); } | |
603 static ByteSize stack_size_offset() { return byte_offset_of(Thread, _stack_size ); } | |
604 | |
605 #define TLAB_FIELD_OFFSET(name) \ | |
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606 static ByteSize tlab_##name##_offset() { return byte_offset_of(Thread, _tlab) + ThreadLocalAllocBuffer::name##_offset(); } |
0 | 607 |
608 TLAB_FIELD_OFFSET(start) | |
609 TLAB_FIELD_OFFSET(end) | |
610 TLAB_FIELD_OFFSET(top) | |
611 TLAB_FIELD_OFFSET(pf_top) | |
612 TLAB_FIELD_OFFSET(size) // desired_size | |
613 TLAB_FIELD_OFFSET(refill_waste_limit) | |
614 TLAB_FIELD_OFFSET(number_of_refills) | |
615 TLAB_FIELD_OFFSET(fast_refill_waste) | |
616 TLAB_FIELD_OFFSET(slow_allocations) | |
617 | |
618 #undef TLAB_FIELD_OFFSET | |
619 | |
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620 static ByteSize allocated_bytes_offset() { return byte_offset_of(Thread, _allocated_bytes ); } |
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621 |
0 | 622 public: |
623 volatile intptr_t _Stalled ; | |
624 volatile int _TypeTag ; | |
625 ParkEvent * _ParkEvent ; // for synchronized() | |
626 ParkEvent * _SleepEvent ; // for Thread.sleep | |
627 ParkEvent * _MutexEvent ; // for native internal Mutex/Monitor | |
628 ParkEvent * _MuxEvent ; // for low-level muxAcquire-muxRelease | |
629 int NativeSyncRecursion ; // diagnostic | |
630 | |
631 volatile int _OnTrap ; // Resume-at IP delta | |
632 jint _hashStateW ; // Marsaglia Shift-XOR thread-local RNG | |
633 jint _hashStateX ; // thread-specific hashCode generator state | |
634 jint _hashStateY ; | |
635 jint _hashStateZ ; | |
636 void * _schedctl ; | |
637 | |
638 intptr_t _ScratchA, _ScratchB ; // Scratch locations for fast-path sync code | |
639 static ByteSize ScratchA_offset() { return byte_offset_of(Thread, _ScratchA ); } | |
640 static ByteSize ScratchB_offset() { return byte_offset_of(Thread, _ScratchB ); } | |
641 | |
642 volatile jint rng [4] ; // RNG for spin loop | |
643 | |
644 // Low-level leaf-lock primitives used to implement synchronization | |
645 // and native monitor-mutex infrastructure. | |
646 // Not for general synchronization use. | |
647 static void SpinAcquire (volatile int * Lock, const char * Name) ; | |
648 static void SpinRelease (volatile int * Lock) ; | |
649 static void muxAcquire (volatile intptr_t * Lock, const char * Name) ; | |
650 static void muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) ; | |
651 static void muxRelease (volatile intptr_t * Lock) ; | |
652 }; | |
653 | |
654 // Inline implementation of Thread::current() | |
655 // Thread::current is "hot" it's called > 128K times in the 1st 500 msecs of | |
656 // startup. | |
657 // ThreadLocalStorage::thread is warm -- it's called > 16K times in the same | |
658 // period. This is inlined in thread_<os_family>.inline.hpp. | |
659 | |
660 inline Thread* Thread::current() { | |
661 #ifdef ASSERT | |
662 // This function is very high traffic. Define PARANOID to enable expensive | |
663 // asserts. | |
664 #ifdef PARANOID | |
665 // Signal handler should call ThreadLocalStorage::get_thread_slow() | |
666 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
667 assert(t != NULL && !t->is_inside_signal_handler(), | |
668 "Don't use Thread::current() inside signal handler"); | |
669 #endif | |
670 #endif | |
671 Thread* thread = ThreadLocalStorage::thread(); | |
672 assert(thread != NULL, "just checking"); | |
673 return thread; | |
674 } | |
675 | |
676 // Name support for threads. non-JavaThread subclasses with multiple | |
677 // uniquely named instances should derive from this. | |
678 class NamedThread: public Thread { | |
679 friend class VMStructs; | |
680 enum { | |
681 max_name_len = 64 | |
682 }; | |
683 private: | |
684 char* _name; | |
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685 // log JavaThread being processed by oops_do |
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686 JavaThread* _processed_thread; |
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687 |
0 | 688 public: |
689 NamedThread(); | |
690 ~NamedThread(); | |
691 // May only be called once per thread. | |
692 void set_name(const char* format, ...); | |
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693 virtual bool is_Named_thread() const { return true; } |
0 | 694 virtual char* name() const { return _name == NULL ? (char*)"Unknown Thread" : _name; } |
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695 JavaThread *processed_thread() { return _processed_thread; } |
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696 void set_processed_thread(JavaThread *thread) { _processed_thread = thread; } |
0 | 697 }; |
698 | |
699 // Worker threads are named and have an id of an assigned work. | |
700 class WorkerThread: public NamedThread { | |
701 private: | |
702 uint _id; | |
703 public: | |
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704 WorkerThread() : _id(0) { } |
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705 virtual bool is_Worker_thread() const { return true; } |
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706 |
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707 virtual WorkerThread* as_Worker_thread() const { |
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708 assert(is_Worker_thread(), "Dubious cast to WorkerThread*?"); |
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709 return (WorkerThread*) this; |
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710 } |
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711 |
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712 void set_id(uint work_id) { _id = work_id; } |
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713 uint id() const { return _id; } |
0 | 714 }; |
715 | |
716 // A single WatcherThread is used for simulating timer interrupts. | |
717 class WatcherThread: public Thread { | |
718 friend class VMStructs; | |
719 public: | |
720 virtual void run(); | |
721 | |
722 private: | |
723 static WatcherThread* _watcher_thread; | |
724 | |
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725 static bool _startable; |
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726 volatile static bool _should_terminate; // updated without holding lock |
0 | 727 public: |
728 enum SomeConstants { | |
729 delay_interval = 10 // interrupt delay in milliseconds | |
730 }; | |
731 | |
732 // Constructor | |
733 WatcherThread(); | |
734 | |
735 // Tester | |
736 bool is_Watcher_thread() const { return true; } | |
737 | |
738 // Printing | |
739 char* name() const { return (char*)"VM Periodic Task Thread"; } | |
740 void print_on(outputStream* st) const; | |
741 void print() const { print_on(tty); } | |
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742 void unpark(); |
0 | 743 |
744 // Returns the single instance of WatcherThread | |
745 static WatcherThread* watcher_thread() { return _watcher_thread; } | |
746 | |
747 // Create and start the single instance of WatcherThread, or stop it on shutdown | |
748 static void start(); | |
749 static void stop(); | |
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750 // Only allow start once the VM is sufficiently initialized |
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751 // Otherwise the first task to enroll will trigger the start |
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752 static void make_startable(); |
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753 |
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754 private: |
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755 int sleep() const; |
0 | 756 }; |
757 | |
758 | |
759 class CompilerThread; | |
760 | |
761 typedef void (*ThreadFunction)(JavaThread*, TRAPS); | |
762 | |
763 class JavaThread: public Thread { | |
764 friend class VMStructs; | |
765 private: | |
766 JavaThread* _next; // The next thread in the Threads list | |
767 oop _threadObj; // The Java level thread object | |
768 | |
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769 // (thomaswue) Necessary for holding a compilation buffer and ci environment. |
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770 // Moved up from CompilerThread to JavaThread in order to enable code |
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771 // installation from Java application code. |
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772 BufferBlob* _buffer_blob; |
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773 ciEnv* _env; |
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774 bool _is_compiling; |
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775 |
0 | 776 #ifdef ASSERT |
777 private: | |
778 int _java_call_counter; | |
779 | |
780 public: | |
781 int java_call_counter() { return _java_call_counter; } | |
782 void inc_java_call_counter() { _java_call_counter++; } | |
783 void dec_java_call_counter() { | |
784 assert(_java_call_counter > 0, "Invalid nesting of JavaCallWrapper"); | |
785 _java_call_counter--; | |
786 } | |
787 private: // restore original namespace restriction | |
788 #endif // ifdef ASSERT | |
789 | |
790 #ifndef PRODUCT | |
791 public: | |
792 enum { | |
793 jump_ring_buffer_size = 16 | |
794 }; | |
795 private: // restore original namespace restriction | |
796 #endif | |
797 | |
798 JavaFrameAnchor _anchor; // Encapsulation of current java frame and it state | |
799 | |
800 ThreadFunction _entry_point; | |
801 | |
802 JNIEnv _jni_environment; | |
803 | |
804 // Deopt support | |
805 DeoptResourceMark* _deopt_mark; // Holds special ResourceMark for deoptimization | |
806 | |
807 intptr_t* _must_deopt_id; // id of frame that needs to be deopted once we | |
808 // transition out of native | |
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809 nmethod* _deopt_nmethod; // nmethod that is currently being deoptimized |
0 | 810 vframeArray* _vframe_array_head; // Holds the heap of the active vframeArrays |
811 vframeArray* _vframe_array_last; // Holds last vFrameArray we popped | |
812 // Because deoptimization is lazy we must save jvmti requests to set locals | |
813 // in compiled frames until we deoptimize and we have an interpreter frame. | |
814 // This holds the pointer to array (yeah like there might be more than one) of | |
815 // description of compiled vframes that have locals that need to be updated. | |
816 GrowableArray<jvmtiDeferredLocalVariableSet*>* _deferred_locals_updates; | |
817 | |
818 // Handshake value for fixing 6243940. We need a place for the i2c | |
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819 // adapter to store the callee Method*. This value is NEVER live |
0 | 820 // across a gc point so it does NOT have to be gc'd |
821 // The handshake is open ended since we can't be certain that it will | |
822 // be NULLed. This is because we rarely ever see the race and end up | |
823 // in handle_wrong_method which is the backend of the handshake. See | |
824 // code in i2c adapters and handle_wrong_method. | |
825 | |
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826 Method* _callee_target; |
0 | 827 |
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828 // Used to pass back results to the interpreter or generated code running Java code. |
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829 oop _vm_result; // oop result is GC-preserved |
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830 Metadata* _vm_result_2; // non-oop result |
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831 |
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832 // See ReduceInitialCardMarks: this holds the precise space interval of |
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833 // the most recent slow path allocation for which compiled code has |
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834 // elided card-marks for performance along the fast-path. |
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835 MemRegion _deferred_card_mark; |
0 | 836 |
837 MonitorChunk* _monitor_chunks; // Contains the off stack monitors | |
838 // allocated during deoptimization | |
839 // and by JNI_MonitorEnter/Exit | |
840 | |
841 // Async. requests support | |
842 enum AsyncRequests { | |
843 _no_async_condition = 0, | |
844 _async_exception, | |
845 _async_unsafe_access_error | |
846 }; | |
847 AsyncRequests _special_runtime_exit_condition; // Enum indicating pending async. request | |
848 oop _pending_async_exception; | |
849 | |
850 // Safepoint support | |
851 public: // Expose _thread_state for SafeFetchInt() | |
852 volatile JavaThreadState _thread_state; | |
853 private: | |
854 ThreadSafepointState *_safepoint_state; // Holds information about a thread during a safepoint | |
855 address _saved_exception_pc; // Saved pc of instruction where last implicit exception happened | |
856 | |
857 // JavaThread termination support | |
858 enum TerminatedTypes { | |
859 _not_terminated = 0xDEAD - 2, | |
860 _thread_exiting, // JavaThread::exit() has been called for this thread | |
861 _thread_terminated, // JavaThread is removed from thread list | |
862 _vm_exited // JavaThread is still executing native code, but VM is terminated | |
863 // only VM_Exit can set _vm_exited | |
864 }; | |
865 | |
866 // In general a JavaThread's _terminated field transitions as follows: | |
867 // | |
868 // _not_terminated => _thread_exiting => _thread_terminated | |
869 // | |
870 // _vm_exited is a special value to cover the case of a JavaThread | |
871 // executing native code after the VM itself is terminated. | |
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872 volatile TerminatedTypes _terminated; |
0 | 873 // suspend/resume support |
874 volatile bool _suspend_equivalent; // Suspend equivalent condition | |
875 jint _in_deopt_handler; // count of deoptimization | |
876 // handlers thread is in | |
877 volatile bool _doing_unsafe_access; // Thread may fault due to unsafe access | |
878 bool _do_not_unlock_if_synchronized; // Do not unlock the receiver of a synchronized method (since it was | |
879 // never locked) when throwing an exception. Used by interpreter only. | |
880 | |
4006 | 881 // JNI attach states: |
882 enum JNIAttachStates { | |
883 _not_attaching_via_jni = 1, // thread is not attaching via JNI | |
884 _attaching_via_jni, // thread is attaching via JNI | |
885 _attached_via_jni // thread has attached via JNI | |
886 }; | |
887 | |
888 // A regular JavaThread's _jni_attach_state is _not_attaching_via_jni. | |
889 // A native thread that is attaching via JNI starts with a value | |
890 // of _attaching_via_jni and transitions to _attached_via_jni. | |
891 volatile JNIAttachStates _jni_attach_state; | |
0 | 892 |
893 public: | |
894 // State of the stack guard pages for this thread. | |
895 enum StackGuardState { | |
896 stack_guard_unused, // not needed | |
897 stack_guard_yellow_disabled,// disabled (temporarily) after stack overflow | |
898 stack_guard_enabled // enabled | |
899 }; | |
900 | |
901 private: | |
902 | |
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903 #ifdef GRAAL |
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904 volatile oop _graal_deopt_info; |
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905 address _graal_alternate_call_target; |
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906 DebugScopedValue* _debug_scope; |
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907 #endif |
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908 #ifdef HIGH_LEVEL_INTERPRETER |
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909 bool _high_level_interpreter_in_vm; |
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910 #endif |
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911 |
0 | 912 StackGuardState _stack_guard_state; |
913 | |
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914 nmethod* _scanned_nmethod; // nmethod being scanned by the sweeper |
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915 |
0 | 916 // Compiler exception handling (NOTE: The _exception_oop is *NOT* the same as _pending_exception. It is |
917 // used to temp. parsing values into and out of the runtime system during exception handling for compiled | |
918 // code) | |
919 volatile oop _exception_oop; // Exception thrown in compiled code | |
920 volatile address _exception_pc; // PC where exception happened | |
921 volatile address _exception_handler_pc; // PC for handler of exception | |
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922 volatile int _is_method_handle_return; // true (== 1) if the current exception PC is a MethodHandle call site. |
0 | 923 |
924 // support for JNI critical regions | |
925 jint _jni_active_critical; // count of entries into JNI critical region | |
926 | |
927 // For deadlock detection. | |
928 int _depth_first_number; | |
929 | |
930 // JVMTI PopFrame support | |
931 // This is set to popframe_pending to signal that top Java frame should be popped immediately | |
932 int _popframe_condition; | |
933 | |
934 #ifndef PRODUCT | |
935 int _jmp_ring_index; | |
936 struct { | |
937 // We use intptr_t instead of address so debugger doesn't try and display strings | |
938 intptr_t _target; | |
939 intptr_t _instruction; | |
940 const char* _file; | |
941 int _line; | |
942 } _jmp_ring[ jump_ring_buffer_size ]; | |
943 #endif /* PRODUCT */ | |
944 | |
342 | 945 #ifndef SERIALGC |
946 // Support for G1 barriers | |
947 | |
948 ObjPtrQueue _satb_mark_queue; // Thread-local log for SATB barrier. | |
949 // Set of all such queues. | |
950 static SATBMarkQueueSet _satb_mark_queue_set; | |
951 | |
952 DirtyCardQueue _dirty_card_queue; // Thread-local log for dirty cards. | |
953 // Set of all such queues. | |
954 static DirtyCardQueueSet _dirty_card_queue_set; | |
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955 |
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956 void flush_barrier_queues(); |
342 | 957 #endif // !SERIALGC |
958 | |
0 | 959 friend class VMThread; |
960 friend class ThreadWaitTransition; | |
961 friend class VM_Exit; | |
962 | |
963 void initialize(); // Initialized the instance variables | |
964 | |
965 public: | |
966 // Constructor | |
4006 | 967 JavaThread(bool is_attaching_via_jni = false); // for main thread and JNI attached threads |
0 | 968 JavaThread(ThreadFunction entry_point, size_t stack_size = 0); |
969 ~JavaThread(); | |
970 | |
971 #ifdef ASSERT | |
972 // verify this JavaThread hasn't be published in the Threads::list yet | |
973 void verify_not_published(); | |
974 #endif | |
975 | |
976 //JNI functiontable getter/setter for JVMTI jni function table interception API. | |
977 void set_jni_functions(struct JNINativeInterface_* functionTable) { | |
978 _jni_environment.functions = functionTable; | |
979 } | |
980 struct JNINativeInterface_* get_jni_functions() { | |
981 return (struct JNINativeInterface_ *)_jni_environment.functions; | |
982 } | |
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983 |
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984 bool is_compiling() const { return _is_compiling; } |
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985 void set_compiling(bool b) { _is_compiling = b; } |
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986 |
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987 // Get/set the thread's compilation environment. |
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988 ciEnv* env() { return _env; } |
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989 void set_env(ciEnv* env) { _env = env; } |
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990 |
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991 BufferBlob* get_buffer_blob() { return _buffer_blob; } |
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992 void set_buffer_blob(BufferBlob* b) { _buffer_blob = b; }; |
0 | 993 |
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994 // This function is called at thread creation to allow |
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995 // platform specific thread variables to be initialized. |
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996 void cache_global_variables(); |
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997 |
0 | 998 // Executes Shutdown.shutdown() |
999 void invoke_shutdown_hooks(); | |
1000 | |
1001 // Cleanup on thread exit | |
1002 enum ExitType { | |
1003 normal_exit, | |
1004 jni_detach | |
1005 }; | |
1006 void exit(bool destroy_vm, ExitType exit_type = normal_exit); | |
1007 | |
1008 void cleanup_failed_attach_current_thread(); | |
1009 | |
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1010 // Track the nmethod currently being scanned by the sweeper |
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1011 void set_scanned_nmethod(nmethod* nm) { |
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1012 assert(_scanned_nmethod == NULL || nm == NULL, "should reset to NULL before writing a new value"); |
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1013 _scanned_nmethod = nm; |
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1014 } |
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1015 |
0 | 1016 // Testers |
1017 virtual bool is_Java_thread() const { return true; } | |
1018 | |
1019 // Thread chain operations | |
1020 JavaThread* next() const { return _next; } | |
1021 void set_next(JavaThread* p) { _next = p; } | |
1022 | |
1023 // Thread oop. threadObj() can be NULL for initial JavaThread | |
1024 // (or for threads attached via JNI) | |
1025 oop threadObj() const { return _threadObj; } | |
1026 void set_threadObj(oop p) { _threadObj = p; } | |
1027 | |
1028 ThreadPriority java_priority() const; // Read from threadObj() | |
1029 | |
1030 // Prepare thread and add to priority queue. If a priority is | |
1031 // not specified, use the priority of the thread object. Threads_lock | |
1032 // must be held while this function is called. | |
1033 void prepare(jobject jni_thread, ThreadPriority prio=NoPriority); | |
1034 | |
1035 void set_saved_exception_pc(address pc) { _saved_exception_pc = pc; } | |
1036 address saved_exception_pc() { return _saved_exception_pc; } | |
1037 | |
1038 | |
1039 ThreadFunction entry_point() const { return _entry_point; } | |
1040 | |
1041 // Allocates a new Java level thread object for this thread. thread_name may be NULL. | |
1042 void allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS); | |
1043 | |
1044 // Last frame anchor routines | |
1045 | |
1046 JavaFrameAnchor* frame_anchor(void) { return &_anchor; } | |
1047 | |
1048 // last_Java_sp | |
1049 bool has_last_Java_frame() const { return _anchor.has_last_Java_frame(); } | |
1050 intptr_t* last_Java_sp() const { return _anchor.last_Java_sp(); } | |
1051 | |
1052 // last_Java_pc | |
1053 | |
1054 address last_Java_pc(void) { return _anchor.last_Java_pc(); } | |
1055 | |
1056 // Safepoint support | |
1057 JavaThreadState thread_state() const { return _thread_state; } | |
1058 void set_thread_state(JavaThreadState s) { _thread_state=s; } | |
1059 ThreadSafepointState *safepoint_state() const { return _safepoint_state; } | |
1060 void set_safepoint_state(ThreadSafepointState *state) { _safepoint_state = state; } | |
1061 bool is_at_poll_safepoint() { return _safepoint_state->is_at_poll_safepoint(); } | |
1062 | |
1063 // thread has called JavaThread::exit() or is terminated | |
1064 bool is_exiting() { return _terminated == _thread_exiting || is_terminated(); } | |
1065 // thread is terminated (no longer on the threads list); we compare | |
1066 // against the two non-terminated values so that a freed JavaThread | |
1067 // will also be considered terminated. | |
1068 bool is_terminated() { return _terminated != _not_terminated && _terminated != _thread_exiting; } | |
1069 void set_terminated(TerminatedTypes t) { _terminated = t; } | |
1070 // special for Threads::remove() which is static: | |
1071 void set_terminated_value() { _terminated = _thread_terminated; } | |
1072 void block_if_vm_exited(); | |
1073 | |
1074 bool doing_unsafe_access() { return _doing_unsafe_access; } | |
1075 void set_doing_unsafe_access(bool val) { _doing_unsafe_access = val; } | |
1076 | |
1077 bool do_not_unlock_if_synchronized() { return _do_not_unlock_if_synchronized; } | |
1078 void set_do_not_unlock_if_synchronized(bool val) { _do_not_unlock_if_synchronized = val; } | |
1079 | |
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1080 #if INCLUDE_NMT |
6197 | 1081 // native memory tracking |
1082 inline MemRecorder* get_recorder() const { return (MemRecorder*)_recorder; } | |
1083 inline void set_recorder(MemRecorder* rc) { _recorder = (volatile MemRecorder*)rc; } | |
1084 | |
1085 private: | |
1086 // per-thread memory recorder | |
1087 volatile MemRecorder* _recorder; | |
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1088 #endif // INCLUDE_NMT |
0 | 1089 |
1090 // Suspend/resume support for JavaThread | |
1091 private: | |
1092 void set_ext_suspended() { set_suspend_flag (_ext_suspended); } | |
1093 void clear_ext_suspended() { clear_suspend_flag(_ext_suspended); } | |
1094 | |
1095 public: | |
1096 void java_suspend(); | |
1097 void java_resume(); | |
1098 int java_suspend_self(); | |
1099 | |
1100 void check_and_wait_while_suspended() { | |
1101 assert(JavaThread::current() == this, "sanity check"); | |
1102 | |
1103 bool do_self_suspend; | |
1104 do { | |
1105 // were we externally suspended while we were waiting? | |
1106 do_self_suspend = handle_special_suspend_equivalent_condition(); | |
1107 if (do_self_suspend) { | |
1108 // don't surprise the thread that suspended us by returning | |
1109 java_suspend_self(); | |
1110 set_suspend_equivalent(); | |
1111 } | |
1112 } while (do_self_suspend); | |
1113 } | |
1114 static void check_safepoint_and_suspend_for_native_trans(JavaThread *thread); | |
1115 // Check for async exception in addition to safepoint and suspend request. | |
1116 static void check_special_condition_for_native_trans(JavaThread *thread); | |
1117 | |
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1118 // Same as check_special_condition_for_native_trans but finishes the |
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1119 // transition into thread_in_Java mode so that it can potentially |
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1120 // block. |
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1121 static void check_special_condition_for_native_trans_and_transition(JavaThread *thread); |
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1122 |
0 | 1123 bool is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits); |
1124 bool is_ext_suspend_completed_with_lock(uint32_t *bits) { | |
1125 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1126 // Warning: is_ext_suspend_completed() may temporarily drop the | |
1127 // SR_lock to allow the thread to reach a stable thread state if | |
1128 // it is currently in a transient thread state. | |
1129 return is_ext_suspend_completed(false /*!called_by_wait */, | |
1130 SuspendRetryDelay, bits); | |
1131 } | |
1132 | |
1133 // We cannot allow wait_for_ext_suspend_completion() to run forever or | |
1134 // we could hang. SuspendRetryCount and SuspendRetryDelay are normally | |
1135 // passed as the count and delay parameters. Experiments with specific | |
1136 // calls to wait_for_ext_suspend_completion() can be done by passing | |
1137 // other values in the code. Experiments with all calls can be done | |
1138 // via the appropriate -XX options. | |
1139 bool wait_for_ext_suspend_completion(int count, int delay, uint32_t *bits); | |
1140 | |
1141 void set_external_suspend() { set_suspend_flag (_external_suspend); } | |
1142 void clear_external_suspend() { clear_suspend_flag(_external_suspend); } | |
1143 | |
1144 void set_deopt_suspend() { set_suspend_flag (_deopt_suspend); } | |
1145 void clear_deopt_suspend() { clear_suspend_flag(_deopt_suspend); } | |
1146 bool is_deopt_suspend() { return (_suspend_flags & _deopt_suspend) != 0; } | |
1147 | |
1148 bool is_external_suspend() const { | |
1149 return (_suspend_flags & _external_suspend) != 0; | |
1150 } | |
1151 // Whenever a thread transitions from native to vm/java it must suspend | |
1152 // if external|deopt suspend is present. | |
1153 bool is_suspend_after_native() const { | |
1154 return (_suspend_flags & (_external_suspend | _deopt_suspend) ) != 0; | |
1155 } | |
1156 | |
1157 // external suspend request is completed | |
1158 bool is_ext_suspended() const { | |
1159 return (_suspend_flags & _ext_suspended) != 0; | |
1160 } | |
1161 | |
1162 bool is_external_suspend_with_lock() const { | |
1163 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1164 return is_external_suspend(); | |
1165 } | |
1166 | |
1167 // Special method to handle a pending external suspend request | |
1168 // when a suspend equivalent condition lifts. | |
1169 bool handle_special_suspend_equivalent_condition() { | |
1170 assert(is_suspend_equivalent(), | |
1171 "should only be called in a suspend equivalence condition"); | |
1172 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1173 bool ret = is_external_suspend(); | |
1174 if (!ret) { | |
1175 // not about to self-suspend so clear suspend equivalence | |
1176 clear_suspend_equivalent(); | |
1177 } | |
1178 // implied else: | |
1179 // We have a pending external suspend request so we leave the | |
1180 // suspend_equivalent flag set until java_suspend_self() sets | |
1181 // the ext_suspended flag and clears the suspend_equivalent | |
1182 // flag. This insures that wait_for_ext_suspend_completion() | |
1183 // will return consistent values. | |
1184 return ret; | |
1185 } | |
1186 | |
1187 // utility methods to see if we are doing some kind of suspension | |
1188 bool is_being_ext_suspended() const { | |
1189 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1190 return is_ext_suspended() || is_external_suspend(); | |
1191 } | |
1192 | |
1193 bool is_suspend_equivalent() const { return _suspend_equivalent; } | |
1194 | |
1195 void set_suspend_equivalent() { _suspend_equivalent = true; }; | |
1196 void clear_suspend_equivalent() { _suspend_equivalent = false; }; | |
1197 | |
1198 // Thread.stop support | |
1199 void send_thread_stop(oop throwable); | |
1200 AsyncRequests clear_special_runtime_exit_condition() { | |
1201 AsyncRequests x = _special_runtime_exit_condition; | |
1202 _special_runtime_exit_condition = _no_async_condition; | |
1203 return x; | |
1204 } | |
1205 | |
1206 // Are any async conditions present? | |
1207 bool has_async_condition() { return (_special_runtime_exit_condition != _no_async_condition); } | |
1208 | |
1209 void check_and_handle_async_exceptions(bool check_unsafe_error = true); | |
1210 | |
1211 // these next two are also used for self-suspension and async exception support | |
1212 void handle_special_runtime_exit_condition(bool check_asyncs = true); | |
1213 | |
1214 // Return true if JavaThread has an asynchronous condition or | |
1215 // if external suspension is requested. | |
1216 bool has_special_runtime_exit_condition() { | |
1217 // We call is_external_suspend() last since external suspend should | |
1218 // be less common. Because we don't use is_external_suspend_with_lock | |
1219 // it is possible that we won't see an asynchronous external suspend | |
1220 // request that has just gotten started, i.e., SR_lock grabbed but | |
1221 // _external_suspend field change either not made yet or not visible | |
1222 // yet. However, this is okay because the request is asynchronous and | |
1223 // we will see the new flag value the next time through. It's also | |
1224 // possible that the external suspend request is dropped after | |
1225 // we have checked is_external_suspend(), we will recheck its value | |
1226 // under SR_lock in java_suspend_self(). | |
1227 return (_special_runtime_exit_condition != _no_async_condition) || | |
1228 is_external_suspend() || is_deopt_suspend(); | |
1229 } | |
1230 | |
1231 void set_pending_unsafe_access_error() { _special_runtime_exit_condition = _async_unsafe_access_error; } | |
1232 | |
1233 void set_pending_async_exception(oop e) { | |
1234 _pending_async_exception = e; | |
1235 _special_runtime_exit_condition = _async_exception; | |
1236 set_has_async_exception(); | |
1237 } | |
1238 | |
1239 // Fast-locking support | |
1240 bool is_lock_owned(address adr) const; | |
1241 | |
1242 // Accessors for vframe array top | |
1243 // The linked list of vframe arrays are sorted on sp. This means when we | |
1244 // unpack the head must contain the vframe array to unpack. | |
1245 void set_vframe_array_head(vframeArray* value) { _vframe_array_head = value; } | |
1246 vframeArray* vframe_array_head() const { return _vframe_array_head; } | |
1247 | |
1248 // Side structure for defering update of java frame locals until deopt occurs | |
1249 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred_locals() const { return _deferred_locals_updates; } | |
1250 void set_deferred_locals(GrowableArray<jvmtiDeferredLocalVariableSet *>* vf) { _deferred_locals_updates = vf; } | |
1251 | |
1252 // These only really exist to make debugging deopt problems simpler | |
1253 | |
1254 void set_vframe_array_last(vframeArray* value) { _vframe_array_last = value; } | |
1255 vframeArray* vframe_array_last() const { return _vframe_array_last; } | |
1256 | |
1257 // The special resourceMark used during deoptimization | |
1258 | |
1259 void set_deopt_mark(DeoptResourceMark* value) { _deopt_mark = value; } | |
1260 DeoptResourceMark* deopt_mark(void) { return _deopt_mark; } | |
1261 | |
1262 intptr_t* must_deopt_id() { return _must_deopt_id; } | |
1263 void set_must_deopt_id(intptr_t* id) { _must_deopt_id = id; } | |
1264 void clear_must_deopt_id() { _must_deopt_id = NULL; } | |
1265 | |
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1266 void set_deopt_nmethod(nmethod* nm) { _deopt_nmethod = nm; } |
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1267 nmethod* deopt_nmethod() { return _deopt_nmethod; } |
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1268 |
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1269 Method* callee_target() const { return _callee_target; } |
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1270 void set_callee_target (Method* x) { _callee_target = x; } |
0 | 1271 |
1272 // Oop results of vm runtime calls | |
1273 oop vm_result() const { return _vm_result; } | |
1274 void set_vm_result (oop x) { _vm_result = x; } | |
1275 | |
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1276 Metadata* vm_result_2() const { return _vm_result_2; } |
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1277 void set_vm_result_2 (Metadata* x) { _vm_result_2 = x; } |
0 | 1278 |
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1279 MemRegion deferred_card_mark() const { return _deferred_card_mark; } |
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1280 void set_deferred_card_mark(MemRegion mr) { _deferred_card_mark = mr; } |
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1281 |
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1282 #ifdef GRAAL |
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1283 oop graal_deopt_info() const { return _graal_deopt_info; } |
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1284 void set_graal_deopt_info(oop o) { _graal_deopt_info = o; } |
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1285 |
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1286 void set_graal_alternate_call_target(address a) { _graal_alternate_call_target = a; } |
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1287 |
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1288 DebugScopedValue* debug_scope() const { return _debug_scope; } |
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1289 void set_debug_scope(DebugScopedValue* ds) { _debug_scope = ds; } |
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1290 #endif |
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1291 #ifdef HIGH_LEVEL_INTERPRETER |
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1292 bool high_level_interpreter_in_vm() { return _high_level_interpreter_in_vm; } |
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1293 void set_high_level_interpreter_in_vm(bool value) { _high_level_interpreter_in_vm = value; } |
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1294 #endif |
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1295 |
0 | 1296 // Exception handling for compiled methods |
1297 oop exception_oop() const { return _exception_oop; } | |
1298 address exception_pc() const { return _exception_pc; } | |
1299 address exception_handler_pc() const { return _exception_handler_pc; } | |
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1300 bool is_method_handle_return() const { return _is_method_handle_return == 1; } |
0 | 1301 |
1302 void set_exception_oop(oop o) { _exception_oop = o; } | |
1303 void set_exception_pc(address a) { _exception_pc = a; } | |
1304 void set_exception_handler_pc(address a) { _exception_handler_pc = a; } | |
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1305 void set_is_method_handle_return(bool value) { _is_method_handle_return = value ? 1 : 0; } |
0 | 1306 |
1307 // Stack overflow support | |
1308 inline size_t stack_available(address cur_sp); | |
1309 address stack_yellow_zone_base() | |
1310 { return (address)(stack_base() - (stack_size() - (stack_red_zone_size() + stack_yellow_zone_size()))); } | |
1311 size_t stack_yellow_zone_size() | |
1312 { return StackYellowPages * os::vm_page_size(); } | |
1313 address stack_red_zone_base() | |
1314 { return (address)(stack_base() - (stack_size() - stack_red_zone_size())); } | |
1315 size_t stack_red_zone_size() | |
1316 { return StackRedPages * os::vm_page_size(); } | |
1317 bool in_stack_yellow_zone(address a) | |
1318 { return (a <= stack_yellow_zone_base()) && (a >= stack_red_zone_base()); } | |
1319 bool in_stack_red_zone(address a) | |
1320 { return (a <= stack_red_zone_base()) && (a >= (address)((intptr_t)stack_base() - stack_size())); } | |
1321 | |
1322 void create_stack_guard_pages(); | |
1323 void remove_stack_guard_pages(); | |
1324 | |
1325 void enable_stack_yellow_zone(); | |
1326 void disable_stack_yellow_zone(); | |
1327 void enable_stack_red_zone(); | |
1328 void disable_stack_red_zone(); | |
1329 | |
1330 inline bool stack_yellow_zone_disabled(); | |
1331 inline bool stack_yellow_zone_enabled(); | |
1332 | |
1333 // Attempt to reguard the stack after a stack overflow may have occurred. | |
1334 // Returns true if (a) guard pages are not needed on this thread, (b) the | |
1335 // pages are already guarded, or (c) the pages were successfully reguarded. | |
1336 // Returns false if there is not enough stack space to reguard the pages, in | |
1337 // which case the caller should unwind a frame and try again. The argument | |
1338 // should be the caller's (approximate) sp. | |
1339 bool reguard_stack(address cur_sp); | |
1340 // Similar to above but see if current stackpoint is out of the guard area | |
1341 // and reguard if possible. | |
1342 bool reguard_stack(void); | |
1343 | |
1344 // Misc. accessors/mutators | |
1345 void set_do_not_unlock(void) { _do_not_unlock_if_synchronized = true; } | |
1346 void clr_do_not_unlock(void) { _do_not_unlock_if_synchronized = false; } | |
1347 bool do_not_unlock(void) { return _do_not_unlock_if_synchronized; } | |
1348 | |
1349 #ifndef PRODUCT | |
1350 void record_jump(address target, address instr, const char* file, int line); | |
1351 #endif /* PRODUCT */ | |
1352 | |
1353 // For assembly stub generation | |
1354 static ByteSize threadObj_offset() { return byte_offset_of(JavaThread, _threadObj ); } | |
1355 #ifndef PRODUCT | |
1356 static ByteSize jmp_ring_index_offset() { return byte_offset_of(JavaThread, _jmp_ring_index ); } | |
1357 static ByteSize jmp_ring_offset() { return byte_offset_of(JavaThread, _jmp_ring ); } | |
1358 #endif /* PRODUCT */ | |
1359 static ByteSize jni_environment_offset() { return byte_offset_of(JavaThread, _jni_environment ); } | |
1360 static ByteSize last_Java_sp_offset() { | |
1361 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_sp_offset(); | |
1362 } | |
1363 static ByteSize last_Java_pc_offset() { | |
1364 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_pc_offset(); | |
1365 } | |
1366 static ByteSize frame_anchor_offset() { | |
1367 return byte_offset_of(JavaThread, _anchor); | |
1368 } | |
1369 static ByteSize callee_target_offset() { return byte_offset_of(JavaThread, _callee_target ); } | |
1370 static ByteSize vm_result_offset() { return byte_offset_of(JavaThread, _vm_result ); } | |
1371 static ByteSize vm_result_2_offset() { return byte_offset_of(JavaThread, _vm_result_2 ); } | |
1372 static ByteSize thread_state_offset() { return byte_offset_of(JavaThread, _thread_state ); } | |
1373 static ByteSize saved_exception_pc_offset() { return byte_offset_of(JavaThread, _saved_exception_pc ); } | |
1374 static ByteSize osthread_offset() { return byte_offset_of(JavaThread, _osthread ); } | |
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1375 #ifdef GRAAL |
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1376 static ByteSize graal_deopt_info_offset() { return byte_offset_of(JavaThread, _graal_deopt_info ); } |
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1377 static ByteSize graal_alternate_call_target_offset() { return byte_offset_of(JavaThread, _graal_alternate_call_target); } |
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1378 #endif |
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1379 #ifdef HIGH_LEVEL_INTERPRETER |
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1380 static ByteSize high_level_interpreter_in_vm_offset() { return byte_offset_of(JavaThread, _high_level_interpreter_in_vm); } |
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1381 #endif |
0 | 1382 static ByteSize exception_oop_offset() { return byte_offset_of(JavaThread, _exception_oop ); } |
1383 static ByteSize exception_pc_offset() { return byte_offset_of(JavaThread, _exception_pc ); } | |
1384 static ByteSize exception_handler_pc_offset() { return byte_offset_of(JavaThread, _exception_handler_pc); } | |
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1385 static ByteSize is_method_handle_return_offset() { return byte_offset_of(JavaThread, _is_method_handle_return); } |
0 | 1386 static ByteSize stack_guard_state_offset() { return byte_offset_of(JavaThread, _stack_guard_state ); } |
1387 static ByteSize suspend_flags_offset() { return byte_offset_of(JavaThread, _suspend_flags ); } | |
1388 | |
1389 static ByteSize do_not_unlock_if_synchronized_offset() { return byte_offset_of(JavaThread, _do_not_unlock_if_synchronized); } | |
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1390 static ByteSize should_post_on_exceptions_flag_offset() { |
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1391 return byte_offset_of(JavaThread, _should_post_on_exceptions_flag); |
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1392 } |
0 | 1393 |
342 | 1394 #ifndef SERIALGC |
1395 static ByteSize satb_mark_queue_offset() { return byte_offset_of(JavaThread, _satb_mark_queue); } | |
1396 static ByteSize dirty_card_queue_offset() { return byte_offset_of(JavaThread, _dirty_card_queue); } | |
1397 #endif // !SERIALGC | |
1398 | |
0 | 1399 // Returns the jni environment for this thread |
1400 JNIEnv* jni_environment() { return &_jni_environment; } | |
1401 | |
1402 static JavaThread* thread_from_jni_environment(JNIEnv* env) { | |
1403 JavaThread *thread_from_jni_env = (JavaThread*)((intptr_t)env - in_bytes(jni_environment_offset())); | |
1404 // Only return NULL if thread is off the thread list; starting to | |
1405 // exit should not return NULL. | |
1406 if (thread_from_jni_env->is_terminated()) { | |
1407 thread_from_jni_env->block_if_vm_exited(); | |
1408 return NULL; | |
1409 } else { | |
1410 return thread_from_jni_env; | |
1411 } | |
1412 } | |
1413 | |
1414 // JNI critical regions. These can nest. | |
1415 bool in_critical() { return _jni_active_critical > 0; } | |
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1416 bool in_last_critical() { return _jni_active_critical == 1; } |
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1417 void enter_critical() { assert(Thread::current() == this || |
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1418 Thread::current()->is_VM_thread() && SafepointSynchronize::is_synchronizing(), |
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1419 "this must be current thread or synchronizing"); |
0 | 1420 _jni_active_critical++; } |
1421 void exit_critical() { assert(Thread::current() == this, | |
1422 "this must be current thread"); | |
1423 _jni_active_critical--; | |
1424 assert(_jni_active_critical >= 0, | |
1425 "JNI critical nesting problem?"); } | |
1426 | |
1427 // For deadlock detection | |
1428 int depth_first_number() { return _depth_first_number; } | |
1429 void set_depth_first_number(int dfn) { _depth_first_number = dfn; } | |
1430 | |
1431 private: | |
1432 void set_monitor_chunks(MonitorChunk* monitor_chunks) { _monitor_chunks = monitor_chunks; } | |
1433 | |
1434 public: | |
1435 MonitorChunk* monitor_chunks() const { return _monitor_chunks; } | |
1436 void add_monitor_chunk(MonitorChunk* chunk); | |
1437 void remove_monitor_chunk(MonitorChunk* chunk); | |
1438 bool in_deopt_handler() const { return _in_deopt_handler > 0; } | |
1439 void inc_in_deopt_handler() { _in_deopt_handler++; } | |
1440 void dec_in_deopt_handler() { | |
1441 assert(_in_deopt_handler > 0, "mismatched deopt nesting"); | |
1442 if (_in_deopt_handler > 0) { // robustness | |
1443 _in_deopt_handler--; | |
1444 } | |
1445 } | |
1446 | |
1447 private: | |
1448 void set_entry_point(ThreadFunction entry_point) { _entry_point = entry_point; } | |
1449 | |
1450 public: | |
1451 | |
1452 // Frame iteration; calls the function f for all frames on the stack | |
1453 void frames_do(void f(frame*, const RegisterMap*)); | |
1454 | |
1455 // Memory operations | |
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1456 void oops_do(OopClosure* f, CodeBlobClosure* cf); |
0 | 1457 |
1458 // Sweeper operations | |
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1459 void nmethods_do(CodeBlobClosure* cf); |
0 | 1460 |
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1461 // RedefineClasses Support |
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1462 void metadata_do(void f(Metadata*)); |
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1463 |
0 | 1464 // Memory management operations |
1465 void gc_epilogue(); | |
1466 void gc_prologue(); | |
1467 | |
1468 // Misc. operations | |
1469 char* name() const { return (char*)get_thread_name(); } | |
1470 void print_on(outputStream* st) const; | |
1471 void print() const { print_on(tty); } | |
1472 void print_value(); | |
1473 void print_thread_state_on(outputStream* ) const PRODUCT_RETURN; | |
1474 void print_thread_state() const PRODUCT_RETURN; | |
1475 void print_on_error(outputStream* st, char* buf, int buflen) const; | |
1476 void verify(); | |
1477 const char* get_thread_name() const; | |
1478 private: | |
1479 // factor out low-level mechanics for use in both normal and error cases | |
1480 const char* get_thread_name_string(char* buf = NULL, int buflen = 0) const; | |
1481 public: | |
1482 const char* get_threadgroup_name() const; | |
1483 const char* get_parent_name() const; | |
1484 | |
1485 // Accessing frames | |
1486 frame last_frame() { | |
1487 _anchor.make_walkable(this); | |
1488 return pd_last_frame(); | |
1489 } | |
1490 javaVFrame* last_java_vframe(RegisterMap* reg_map); | |
1491 | |
1492 // Returns method at 'depth' java or native frames down the stack | |
1493 // Used for security checks | |
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1494 Klass* security_get_caller_class(int depth); |
0 | 1495 |
1496 // Print stack trace in external format | |
1497 void print_stack_on(outputStream* st); | |
1498 void print_stack() { print_stack_on(tty); } | |
1499 | |
1500 // Print stack traces in various internal formats | |
1501 void trace_stack() PRODUCT_RETURN; | |
1502 void trace_stack_from(vframe* start_vf) PRODUCT_RETURN; | |
1503 void trace_frames() PRODUCT_RETURN; | |
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1504 void trace_oops() PRODUCT_RETURN; |
0 | 1505 |
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1506 // Print an annotated view of the stack frames |
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1507 void print_frame_layout(int depth = 0, bool validate_only = false) NOT_DEBUG_RETURN; |
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1508 void validate_frame_layout() { |
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1509 print_frame_layout(0, true); |
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1510 } |
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1511 |
0 | 1512 // Returns the number of stack frames on the stack |
1513 int depth() const; | |
1514 | |
1515 // Function for testing deoptimization | |
1516 void deoptimize(); | |
1517 void make_zombies(); | |
1518 | |
1519 void deoptimized_wrt_marked_nmethods(); | |
1520 | |
1521 // Profiling operation (see fprofile.cpp) | |
1522 public: | |
1523 bool profile_last_Java_frame(frame* fr); | |
1524 | |
1525 private: | |
1526 ThreadProfiler* _thread_profiler; | |
1527 private: | |
1528 friend class FlatProfiler; // uses both [gs]et_thread_profiler. | |
1529 friend class FlatProfilerTask; // uses get_thread_profiler. | |
1530 friend class ThreadProfilerMark; // uses get_thread_profiler. | |
1531 ThreadProfiler* get_thread_profiler() { return _thread_profiler; } | |
1532 ThreadProfiler* set_thread_profiler(ThreadProfiler* tp) { | |
1533 ThreadProfiler* result = _thread_profiler; | |
1534 _thread_profiler = tp; | |
1535 return result; | |
1536 } | |
1537 | |
6197 | 1538 // NMT (Native memory tracking) support. |
1539 // This flag helps NMT to determine if this JavaThread will be blocked | |
1540 // at safepoint. If not, ThreadCritical is needed for writing memory records. | |
1541 // JavaThread is only safepoint visible when it is in Threads' thread list, | |
1542 // it is not visible until it is added to the list and becomes invisible | |
1543 // once it is removed from the list. | |
1544 public: | |
1545 bool is_safepoint_visible() const { return _safepoint_visible; } | |
1546 void set_safepoint_visible(bool visible) { _safepoint_visible = visible; } | |
1547 private: | |
1548 bool _safepoint_visible; | |
1549 | |
0 | 1550 // Static operations |
1551 public: | |
1552 // Returns the running thread as a JavaThread | |
1553 static inline JavaThread* current(); | |
1554 | |
1555 // Returns the active Java thread. Do not use this if you know you are calling | |
1556 // from a JavaThread, as it's slower than JavaThread::current. If called from | |
1557 // the VMThread, it also returns the JavaThread that instigated the VMThread's | |
1558 // operation. You may not want that either. | |
1559 static JavaThread* active(); | |
1560 | |
1561 inline CompilerThread* as_CompilerThread(); | |
1562 | |
1563 public: | |
1564 virtual void run(); | |
1565 void thread_main_inner(); | |
1566 | |
1567 private: | |
1568 // PRIVILEGED STACK | |
1569 PrivilegedElement* _privileged_stack_top; | |
1570 GrowableArray<oop>* _array_for_gc; | |
1571 public: | |
1572 | |
1573 // Returns the privileged_stack information. | |
1574 PrivilegedElement* privileged_stack_top() const { return _privileged_stack_top; } | |
1575 void set_privileged_stack_top(PrivilegedElement *e) { _privileged_stack_top = e; } | |
1576 void register_array_for_gc(GrowableArray<oop>* array) { _array_for_gc = array; } | |
1577 | |
1578 public: | |
1579 // Thread local information maintained by JVMTI. | |
1580 void set_jvmti_thread_state(JvmtiThreadState *value) { _jvmti_thread_state = value; } | |
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1581 // A JvmtiThreadState is lazily allocated. This jvmti_thread_state() |
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1582 // getter is used to get this JavaThread's JvmtiThreadState if it has |
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1583 // one which means NULL can be returned. JvmtiThreadState::state_for() |
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1584 // is used to get the specified JavaThread's JvmtiThreadState if it has |
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1585 // one or it allocates a new JvmtiThreadState for the JavaThread and |
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1586 // returns it. JvmtiThreadState::state_for() will return NULL only if |
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1587 // the specified JavaThread is exiting. |
0 | 1588 JvmtiThreadState *jvmti_thread_state() const { return _jvmti_thread_state; } |
1589 static ByteSize jvmti_thread_state_offset() { return byte_offset_of(JavaThread, _jvmti_thread_state); } | |
1590 void set_jvmti_get_loaded_classes_closure(JvmtiGetLoadedClassesClosure* value) { _jvmti_get_loaded_classes_closure = value; } | |
1591 JvmtiGetLoadedClassesClosure* get_jvmti_get_loaded_classes_closure() const { return _jvmti_get_loaded_classes_closure; } | |
1592 | |
1593 // JVMTI PopFrame support | |
1594 // Setting and clearing popframe_condition | |
1595 // All of these enumerated values are bits. popframe_pending | |
1596 // indicates that a PopFrame() has been requested and not yet been | |
1597 // completed. popframe_processing indicates that that PopFrame() is in | |
1598 // the process of being completed. popframe_force_deopt_reexecution_bit | |
1599 // indicates that special handling is required when returning to a | |
1600 // deoptimized caller. | |
1601 enum PopCondition { | |
1602 popframe_inactive = 0x00, | |
1603 popframe_pending_bit = 0x01, | |
1604 popframe_processing_bit = 0x02, | |
1605 popframe_force_deopt_reexecution_bit = 0x04 | |
1606 }; | |
1607 PopCondition popframe_condition() { return (PopCondition) _popframe_condition; } | |
1608 void set_popframe_condition(PopCondition c) { _popframe_condition = c; } | |
1609 void set_popframe_condition_bit(PopCondition c) { _popframe_condition |= c; } | |
1610 void clear_popframe_condition() { _popframe_condition = popframe_inactive; } | |
1611 static ByteSize popframe_condition_offset() { return byte_offset_of(JavaThread, _popframe_condition); } | |
1612 bool has_pending_popframe() { return (popframe_condition() & popframe_pending_bit) != 0; } | |
1613 bool popframe_forcing_deopt_reexecution() { return (popframe_condition() & popframe_force_deopt_reexecution_bit) != 0; } | |
1614 void clear_popframe_forcing_deopt_reexecution() { _popframe_condition &= ~popframe_force_deopt_reexecution_bit; } | |
1615 #ifdef CC_INTERP | |
1616 bool pop_frame_pending(void) { return ((_popframe_condition & popframe_pending_bit) != 0); } | |
1617 void clr_pop_frame_pending(void) { _popframe_condition = popframe_inactive; } | |
1618 bool pop_frame_in_process(void) { return ((_popframe_condition & popframe_processing_bit) != 0); } | |
1619 void set_pop_frame_in_process(void) { _popframe_condition |= popframe_processing_bit; } | |
1620 void clr_pop_frame_in_process(void) { _popframe_condition &= ~popframe_processing_bit; } | |
1621 #endif | |
1622 | |
1623 private: | |
1624 // Saved incoming arguments to popped frame. | |
1625 // Used only when popped interpreted frame returns to deoptimized frame. | |
1626 void* _popframe_preserved_args; | |
1627 int _popframe_preserved_args_size; | |
1628 | |
1629 public: | |
1630 void popframe_preserve_args(ByteSize size_in_bytes, void* start); | |
1631 void* popframe_preserved_args(); | |
1632 ByteSize popframe_preserved_args_size(); | |
1633 WordSize popframe_preserved_args_size_in_words(); | |
1634 void popframe_free_preserved_args(); | |
1635 | |
1636 | |
1637 private: | |
1638 JvmtiThreadState *_jvmti_thread_state; | |
1639 JvmtiGetLoadedClassesClosure* _jvmti_get_loaded_classes_closure; | |
1640 | |
1641 // Used by the interpreter in fullspeed mode for frame pop, method | |
1642 // entry, method exit and single stepping support. This field is | |
1643 // only set to non-zero by the VM_EnterInterpOnlyMode VM operation. | |
1644 // It can be set to zero asynchronously (i.e., without a VM operation | |
1645 // or a lock) so we have to be very careful. | |
1646 int _interp_only_mode; | |
1647 | |
1648 public: | |
1649 // used by the interpreter for fullspeed debugging support (see above) | |
1650 static ByteSize interp_only_mode_offset() { return byte_offset_of(JavaThread, _interp_only_mode); } | |
1651 bool is_interp_only_mode() { return (_interp_only_mode != 0); } | |
1652 int get_interp_only_mode() { return _interp_only_mode; } | |
1653 void increment_interp_only_mode() { ++_interp_only_mode; } | |
1654 void decrement_interp_only_mode() { --_interp_only_mode; } | |
1655 | |
1213
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1656 // support for cached flag that indicates whether exceptions need to be posted for this thread |
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1657 // if this is false, we can avoid deoptimizing when events are thrown |
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1658 // this gets set to reflect whether jvmtiExport::post_exception_throw would actually do anything |
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1659 private: |
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1660 int _should_post_on_exceptions_flag; |
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1661 |
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1662 public: |
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1663 int should_post_on_exceptions_flag() { return _should_post_on_exceptions_flag; } |
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1664 void set_should_post_on_exceptions_flag(int val) { _should_post_on_exceptions_flag = val; } |
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1665 |
0 | 1666 private: |
1667 ThreadStatistics *_thread_stat; | |
1668 | |
1669 public: | |
1670 ThreadStatistics* get_thread_stat() const { return _thread_stat; } | |
1671 | |
1672 // Return a blocker object for which this thread is blocked parking. | |
1673 oop current_park_blocker(); | |
1674 | |
1675 private: | |
1676 static size_t _stack_size_at_create; | |
1677 | |
1678 public: | |
1679 static inline size_t stack_size_at_create(void) { | |
1680 return _stack_size_at_create; | |
1681 } | |
1682 static inline void set_stack_size_at_create(size_t value) { | |
1683 _stack_size_at_create = value; | |
1684 } | |
1685 | |
342 | 1686 #ifndef SERIALGC |
1687 // SATB marking queue support | |
1688 ObjPtrQueue& satb_mark_queue() { return _satb_mark_queue; } | |
1689 static SATBMarkQueueSet& satb_mark_queue_set() { | |
1690 return _satb_mark_queue_set; | |
1691 } | |
1692 | |
1693 // Dirty card queue support | |
1694 DirtyCardQueue& dirty_card_queue() { return _dirty_card_queue; } | |
1695 static DirtyCardQueueSet& dirty_card_queue_set() { | |
1696 return _dirty_card_queue_set; | |
1697 } | |
1698 #endif // !SERIALGC | |
1699 | |
1842
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1700 // This method initializes the SATB and dirty card queues before a |
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1701 // JavaThread is added to the Java thread list. Right now, we don't |
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1702 // have to do anything to the dirty card queue (it should have been |
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1703 // activated when the thread was created), but we have to activate |
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1704 // the SATB queue if the thread is created while a marking cycle is |
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1705 // in progress. The activation / de-activation of the SATB queues at |
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1706 // the beginning / end of a marking cycle is done during safepoints |
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1707 // so we have to make sure this method is called outside one to be |
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1708 // able to safely read the active field of the SATB queue set. Right |
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1709 // now, it is called just before the thread is added to the Java |
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1710 // thread list in the Threads::add() method. That method is holding |
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1711 // the Threads_lock which ensures we are outside a safepoint. We |
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1712 // cannot do the obvious and set the active field of the SATB queue |
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1713 // when the thread is created given that, in some cases, safepoints |
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1714 // might happen between the JavaThread constructor being called and the |
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1715 // thread being added to the Java thread list (an example of this is |
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1716 // when the structure for the DestroyJavaVM thread is created). |
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1717 #ifndef SERIALGC |
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1718 void initialize_queues(); |
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1719 #else // !SERIALGC |
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1720 void initialize_queues() { } |
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1721 #endif // !SERIALGC |
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1722 |
0 | 1723 // Machine dependent stuff |
1972 | 1724 #ifdef TARGET_OS_ARCH_linux_x86 |
1725 # include "thread_linux_x86.hpp" | |
1726 #endif | |
1727 #ifdef TARGET_OS_ARCH_linux_sparc | |
1728 # include "thread_linux_sparc.hpp" | |
1729 #endif | |
1730 #ifdef TARGET_OS_ARCH_linux_zero | |
1731 # include "thread_linux_zero.hpp" | |
1732 #endif | |
1733 #ifdef TARGET_OS_ARCH_solaris_x86 | |
1734 # include "thread_solaris_x86.hpp" | |
1735 #endif | |
1736 #ifdef TARGET_OS_ARCH_solaris_sparc | |
1737 # include "thread_solaris_sparc.hpp" | |
1738 #endif | |
1739 #ifdef TARGET_OS_ARCH_windows_x86 | |
1740 # include "thread_windows_x86.hpp" | |
1741 #endif | |
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1742 #ifdef TARGET_OS_ARCH_linux_arm |
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1743 # include "thread_linux_arm.hpp" |
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1744 #endif |
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1745 #ifdef TARGET_OS_ARCH_linux_ppc |
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1746 # include "thread_linux_ppc.hpp" |
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1747 #endif |
3960 | 1748 #ifdef TARGET_OS_ARCH_bsd_x86 |
1749 # include "thread_bsd_x86.hpp" | |
1750 #endif | |
1751 #ifdef TARGET_OS_ARCH_bsd_zero | |
1752 # include "thread_bsd_zero.hpp" | |
1753 #endif | |
1972 | 1754 |
0 | 1755 |
1756 public: | |
1757 void set_blocked_on_compilation(bool value) { | |
1758 _blocked_on_compilation = value; | |
1759 } | |
1760 | |
1761 bool blocked_on_compilation() { | |
1762 return _blocked_on_compilation; | |
1763 } | |
1764 protected: | |
1765 bool _blocked_on_compilation; | |
1766 | |
1767 | |
1768 // JSR166 per-thread parker | |
1769 private: | |
1770 Parker* _parker; | |
1771 public: | |
1772 Parker* parker() { return _parker; } | |
1773 | |
1774 // Biased locking support | |
1775 private: | |
1776 GrowableArray<MonitorInfo*>* _cached_monitor_info; | |
1777 public: | |
1778 GrowableArray<MonitorInfo*>* cached_monitor_info() { return _cached_monitor_info; } | |
1779 void set_cached_monitor_info(GrowableArray<MonitorInfo*>* info) { _cached_monitor_info = info; } | |
1780 | |
1781 // clearing/querying jni attach status | |
4006 | 1782 bool is_attaching_via_jni() const { return _jni_attach_state == _attaching_via_jni; } |
1783 bool has_attached_via_jni() const { return is_attaching_via_jni() || _jni_attach_state == _attached_via_jni; } | |
1784 void set_done_attaching_via_jni() { _jni_attach_state = _attached_via_jni; OrderAccess::fence(); } | |
342 | 1785 private: |
1786 // This field is used to determine if a thread has claimed | |
1787 // a par_id: it is -1 if the thread has not claimed a par_id; | |
1788 // otherwise its value is the par_id that has been claimed. | |
1789 int _claimed_par_id; | |
1790 public: | |
1791 int get_claimed_par_id() { return _claimed_par_id; } | |
1792 void set_claimed_par_id(int id) { _claimed_par_id = id;} | |
0 | 1793 }; |
1794 | |
1795 // Inline implementation of JavaThread::current | |
1796 inline JavaThread* JavaThread::current() { | |
1797 Thread* thread = ThreadLocalStorage::thread(); | |
1798 assert(thread != NULL && thread->is_Java_thread(), "just checking"); | |
1799 return (JavaThread*)thread; | |
1800 } | |
1801 | |
1802 inline CompilerThread* JavaThread::as_CompilerThread() { | |
1803 assert(is_Compiler_thread(), "just checking"); | |
1804 return (CompilerThread*)this; | |
1805 } | |
1806 | |
1807 inline bool JavaThread::stack_yellow_zone_disabled() { | |
1808 return _stack_guard_state == stack_guard_yellow_disabled; | |
1809 } | |
1810 | |
1811 inline bool JavaThread::stack_yellow_zone_enabled() { | |
1812 #ifdef ASSERT | |
1813 if (os::uses_stack_guard_pages()) { | |
1814 assert(_stack_guard_state != stack_guard_unused, "guard pages must be in use"); | |
1815 } | |
1816 #endif | |
1817 return _stack_guard_state == stack_guard_enabled; | |
1818 } | |
1819 | |
1820 inline size_t JavaThread::stack_available(address cur_sp) { | |
1821 // This code assumes java stacks grow down | |
1822 address low_addr; // Limit on the address for deepest stack depth | |
1823 if ( _stack_guard_state == stack_guard_unused) { | |
1824 low_addr = stack_base() - stack_size(); | |
1825 } else { | |
1826 low_addr = stack_yellow_zone_base(); | |
1827 } | |
1828 return cur_sp > low_addr ? cur_sp - low_addr : 0; | |
1829 } | |
1830 | |
1831 // A thread used for Compilation. | |
1832 class CompilerThread : public JavaThread { | |
1833 friend class VMStructs; | |
1834 private: | |
1835 CompilerCounters* _counters; | |
1836 | |
1837 CompileLog* _log; | |
1838 CompileTask* _task; | |
1839 CompileQueue* _queue; | |
1840 | |
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1841 |
0 | 1842 public: |
1843 | |
1844 static CompilerThread* current(); | |
1845 | |
1846 CompilerThread(CompileQueue* queue, CompilerCounters* counters); | |
1847 | |
1848 bool is_Compiler_thread() const { return true; } | |
1849 // Hide this compiler thread from external view. | |
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1850 // (thomaswue) For Graal, the compiler thread should be visible. |
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1851 bool is_hidden_from_external_view() const { |
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1852 #ifdef GRAAL |
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1853 return !DebugGraal; |
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1854 #else |
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1855 return true; |
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1856 #endif |
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1857 } |
0 | 1858 |
1859 CompileQueue* queue() { return _queue; } | |
1860 CompilerCounters* counters() { return _counters; } | |
1861 | |
1862 // Get/set the thread's logging information | |
1863 CompileLog* log() { return _log; } | |
1864 void init_log(CompileLog* log) { | |
1865 // Set once, for good. | |
1866 assert(_log == NULL, "set only once"); | |
1867 _log = log; | |
1868 } | |
1869 | |
1870 #ifndef PRODUCT | |
1871 private: | |
1872 IdealGraphPrinter *_ideal_graph_printer; | |
1873 public: | |
1874 IdealGraphPrinter *ideal_graph_printer() { return _ideal_graph_printer; } | |
1875 void set_ideal_graph_printer(IdealGraphPrinter *n) { _ideal_graph_printer = n; } | |
1876 #endif | |
1877 | |
1878 // Get/set the thread's current task | |
1879 CompileTask* task() { return _task; } | |
1880 void set_task(CompileTask* task) { _task = task; } | |
1881 }; | |
1882 | |
1883 inline CompilerThread* CompilerThread::current() { | |
1884 return JavaThread::current()->as_CompilerThread(); | |
1885 } | |
1886 | |
1887 | |
1888 // The active thread queue. It also keeps track of the current used | |
1889 // thread priorities. | |
1890 class Threads: AllStatic { | |
1891 friend class VMStructs; | |
1892 private: | |
1893 static JavaThread* _thread_list; | |
1894 static int _number_of_threads; | |
1895 static int _number_of_non_daemon_threads; | |
1896 static int _return_code; | |
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1897 #ifdef ASSERT |
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1898 static bool _vm_complete; |
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1899 #endif |
0 | 1900 |
1901 public: | |
1902 // Thread management | |
1903 // force_daemon is a concession to JNI, where we may need to add a | |
1904 // thread to the thread list before allocating its thread object | |
1905 static void add(JavaThread* p, bool force_daemon = false); | |
1906 static void remove(JavaThread* p); | |
1907 static bool includes(JavaThread* p); | |
1908 static JavaThread* first() { return _thread_list; } | |
1909 static void threads_do(ThreadClosure* tc); | |
1910 | |
1911 // Initializes the vm and creates the vm thread | |
1912 static jint create_vm(JavaVMInitArgs* args, bool* canTryAgain); | |
1913 static void convert_vm_init_libraries_to_agents(); | |
1914 static void create_vm_init_libraries(); | |
1915 static void create_vm_init_agents(); | |
1916 static void shutdown_vm_agents(); | |
1917 static bool destroy_vm(); | |
1918 // Supported VM versions via JNI | |
1919 // Includes JNI_VERSION_1_1 | |
1920 static jboolean is_supported_jni_version_including_1_1(jint version); | |
1921 // Does not include JNI_VERSION_1_1 | |
1922 static jboolean is_supported_jni_version(jint version); | |
1923 | |
1924 // Garbage collection | |
1925 static void follow_other_roots(void f(oop*)); | |
1926 | |
1927 // Apply "f->do_oop" to all root oops in all threads. | |
1928 // This version may only be called by sequential code. | |
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1929 static void oops_do(OopClosure* f, CodeBlobClosure* cf); |
0 | 1930 // This version may be called by sequential or parallel code. |
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1931 static void possibly_parallel_oops_do(OopClosure* f, CodeBlobClosure* cf); |
0 | 1932 // This creates a list of GCTasks, one per thread. |
1933 static void create_thread_roots_tasks(GCTaskQueue* q); | |
1934 // This creates a list of GCTasks, one per thread, for marking objects. | |
1935 static void create_thread_roots_marking_tasks(GCTaskQueue* q); | |
1936 | |
1937 // Apply "f->do_oop" to roots in all threads that | |
1938 // are part of compiled frames | |
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1939 static void compiled_frame_oops_do(OopClosure* f, CodeBlobClosure* cf); |
0 | 1940 |
1941 static void convert_hcode_pointers(); | |
1942 static void restore_hcode_pointers(); | |
1943 | |
1944 // Sweeper | |
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1945 static void nmethods_do(CodeBlobClosure* cf); |
0 | 1946 |
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1947 // RedefineClasses support |
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1948 static void metadata_do(void f(Metadata*)); |
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1949 |
0 | 1950 static void gc_epilogue(); |
1951 static void gc_prologue(); | |
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1952 #ifdef ASSERT |
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1953 static bool is_vm_complete() { return _vm_complete; } |
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1954 #endif |
0 | 1955 |
1956 // Verification | |
1957 static void verify(); | |
1958 static void print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks); | |
1959 static void print(bool print_stacks, bool internal_format) { | |
1960 // this function is only used by debug.cpp | |
1961 print_on(tty, print_stacks, internal_format, false /* no concurrent lock printed */); | |
1962 } | |
1963 static void print_on_error(outputStream* st, Thread* current, char* buf, int buflen); | |
1964 | |
1965 // Get Java threads that are waiting to enter a monitor. If doLock | |
1966 // is true, then Threads_lock is grabbed as needed. Otherwise, the | |
1967 // VM needs to be at a safepoint. | |
1968 static GrowableArray<JavaThread*>* get_pending_threads(int count, | |
1969 address monitor, bool doLock); | |
1970 | |
1971 // Get owning Java thread from the monitor's owner field. If doLock | |
1972 // is true, then Threads_lock is grabbed as needed. Otherwise, the | |
1973 // VM needs to be at a safepoint. | |
1974 static JavaThread *owning_thread_from_monitor_owner(address owner, | |
1975 bool doLock); | |
1976 | |
1977 // Number of threads on the active threads list | |
1978 static int number_of_threads() { return _number_of_threads; } | |
1979 // Number of non-daemon threads on the active threads list | |
1980 static int number_of_non_daemon_threads() { return _number_of_non_daemon_threads; } | |
1981 | |
1982 // Deoptimizes all frames tied to marked nmethods | |
1983 static void deoptimized_wrt_marked_nmethods(); | |
1984 | |
1985 }; | |
1986 | |
1987 | |
1988 // Thread iterator | |
1989 class ThreadClosure: public StackObj { | |
1990 public: | |
1991 virtual void do_thread(Thread* thread) = 0; | |
1992 }; | |
1993 | |
1994 class SignalHandlerMark: public StackObj { | |
1995 private: | |
1996 Thread* _thread; | |
1997 public: | |
1998 SignalHandlerMark(Thread* t) { | |
1999 _thread = t; | |
2000 if (_thread) _thread->enter_signal_handler(); | |
2001 } | |
2002 ~SignalHandlerMark() { | |
2003 if (_thread) _thread->leave_signal_handler(); | |
2004 _thread = NULL; | |
2005 } | |
2006 }; | |
2007 | |
1972 | 2008 |
2009 #endif // SHARE_VM_RUNTIME_THREAD_HPP |