Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/thread.hpp @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
| author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
|---|---|
| date | Mon, 18 Sep 2017 18:49:45 +0200 |
| parents | 3ef45d0a6d77 |
| children |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2015, 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" | |
| 20393 | 43 #include "runtime/thread_ext.hpp" |
| 1972 | 44 #include "runtime/unhandledOops.hpp" |
| 10405 | 45 #include "trace/traceBackend.hpp" |
| 46 #include "trace/traceMacros.hpp" | |
| 1972 | 47 #include "utilities/exceptions.hpp" |
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48 #include "utilities/macros.hpp" |
| 1972 | 49 #include "utilities/top.hpp" |
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50 #if INCLUDE_ALL_GCS |
| 1972 | 51 #include "gc_implementation/g1/dirtyCardQueue.hpp" |
| 52 #include "gc_implementation/g1/satbQueue.hpp" | |
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53 #endif // INCLUDE_ALL_GCS |
| 1972 | 54 #ifdef ZERO |
| 55 #ifdef TARGET_ARCH_zero | |
| 56 # include "stack_zero.hpp" | |
| 57 #endif | |
| 58 #endif | |
| 59 | |
| 0 | 60 class ThreadSafepointState; |
| 61 class ThreadProfiler; | |
| 62 | |
| 63 class JvmtiThreadState; | |
| 64 class JvmtiGetLoadedClassesClosure; | |
| 65 class ThreadStatistics; | |
| 66 class ConcurrentLocksDump; | |
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67 class ParkEvent; |
| 1878 | 68 class Parker; |
| 0 | 69 |
| 70 class ciEnv; | |
| 71 class CompileThread; | |
| 72 class CompileLog; | |
| 73 class CompileTask; | |
| 74 class CompileQueue; | |
| 75 class CompilerCounters; | |
| 76 class vframeArray; | |
| 77 | |
| 78 class DeoptResourceMark; | |
| 79 class jvmtiDeferredLocalVariableSet; | |
| 80 | |
| 81 class GCTaskQueue; | |
| 82 class ThreadClosure; | |
| 83 class IdealGraphPrinter; | |
| 84 | |
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85 class Metadata; |
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86 template <class T, MEMFLAGS F> class ChunkedList; |
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87 typedef ChunkedList<Metadata*, mtInternal> MetadataOnStackBuffer; |
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88 |
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89 DEBUG_ONLY(class ResourceMark;) |
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90 |
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91 class WorkerThread; |
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92 |
| 0 | 93 // Class hierarchy |
| 94 // - Thread | |
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95 // - NamedThread |
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96 // - VMThread |
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97 // - ConcurrentGCThread |
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98 // - WorkerThread |
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99 // - GangWorker |
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100 // - GCTaskThread |
| 0 | 101 // - JavaThread |
| 102 // - WatcherThread | |
| 103 | |
| 104 class Thread: public ThreadShadow { | |
| 105 friend class VMStructs; | |
| 106 private: | |
| 107 // Exception handling | |
| 108 // (Note: _pending_exception and friends are in ThreadShadow) | |
| 109 //oop _pending_exception; // pending exception for current thread | |
| 110 // const char* _exception_file; // file information for exception (debugging only) | |
| 111 // int _exception_line; // line information for exception (debugging only) | |
| 6197 | 112 protected: |
| 0 | 113 // Support for forcing alignment of thread objects for biased locking |
| 114 void* _real_malloc_address; | |
| 115 public: | |
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116 void* operator new(size_t size) throw() { return allocate(size, true); } |
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117 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() { |
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118 return allocate(size, false); } |
| 0 | 119 void operator delete(void* p); |
| 6197 | 120 |
| 121 protected: | |
| 122 static void* allocate(size_t size, bool throw_excpt, MEMFLAGS flags = mtThread); | |
| 0 | 123 private: |
| 124 | |
| 125 // *************************************************************** | |
| 126 // Suspend and resume support | |
| 127 // *************************************************************** | |
| 128 // | |
| 129 // VM suspend/resume no longer exists - it was once used for various | |
| 130 // things including safepoints but was deprecated and finally removed | |
| 131 // in Java 7. Because VM suspension was considered "internal" Java-level | |
| 132 // suspension was considered "external", and this legacy naming scheme | |
| 133 // remains. | |
| 134 // | |
| 135 // External suspend/resume requests come from JVM_SuspendThread, | |
| 136 // JVM_ResumeThread, JVMTI SuspendThread, and finally JVMTI | |
| 137 // ResumeThread. External | |
| 138 // suspend requests cause _external_suspend to be set and external | |
| 139 // resume requests cause _external_suspend to be cleared. | |
| 140 // External suspend requests do not nest on top of other external | |
| 141 // suspend requests. The higher level APIs reject suspend requests | |
| 142 // for already suspended threads. | |
| 143 // | |
| 144 // The external_suspend | |
| 145 // flag is checked by has_special_runtime_exit_condition() and java thread | |
| 146 // will self-suspend when handle_special_runtime_exit_condition() is | |
| 147 // called. Most uses of the _thread_blocked state in JavaThreads are | |
| 148 // considered the same as being externally suspended; if the blocking | |
| 149 // condition lifts, the JavaThread will self-suspend. Other places | |
| 150 // where VM checks for external_suspend include: | |
| 151 // + mutex granting (do not enter monitors when thread is suspended) | |
| 152 // + state transitions from _thread_in_native | |
| 153 // | |
| 154 // In general, java_suspend() does not wait for an external suspend | |
| 155 // request to complete. When it returns, the only guarantee is that | |
| 156 // the _external_suspend field is true. | |
| 157 // | |
| 158 // wait_for_ext_suspend_completion() is used to wait for an external | |
| 159 // suspend request to complete. External suspend requests are usually | |
| 160 // followed by some other interface call that requires the thread to | |
| 161 // be quiescent, e.g., GetCallTrace(). By moving the "wait time" into | |
| 162 // the interface that requires quiescence, we give the JavaThread a | |
| 163 // chance to self-suspend before we need it to be quiescent. This | |
| 164 // improves overall suspend/query performance. | |
| 165 // | |
| 166 // _suspend_flags controls the behavior of java_ suspend/resume. | |
| 167 // It must be set under the protection of SR_lock. Read from the flag is | |
| 168 // OK without SR_lock as long as the value is only used as a hint. | |
| 169 // (e.g., check _external_suspend first without lock and then recheck | |
| 170 // inside SR_lock and finish the suspension) | |
| 171 // | |
| 172 // _suspend_flags is also overloaded for other "special conditions" so | |
| 173 // that a single check indicates whether any special action is needed | |
| 174 // eg. for async exceptions. | |
| 175 // ------------------------------------------------------------------- | |
| 176 // Notes: | |
| 177 // 1. The suspend/resume logic no longer uses ThreadState in OSThread | |
| 178 // but we still update its value to keep other part of the system (mainly | |
| 179 // JVMTI) happy. ThreadState is legacy code (see notes in | |
| 180 // osThread.hpp). | |
| 181 // | |
| 182 // 2. It would be more natural if set_external_suspend() is private and | |
| 183 // part of java_suspend(), but that probably would affect the suspend/query | |
| 184 // performance. Need more investigation on this. | |
| 185 // | |
| 186 | |
| 187 // suspend/resume lock: used for self-suspend | |
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188 Monitor* _SR_lock; |
| 0 | 189 |
| 190 protected: | |
| 191 enum SuspendFlags { | |
| 192 // NOTE: avoid using the sign-bit as cc generates different test code | |
| 193 // when the sign-bit is used, and sometimes incorrectly - see CR 6398077 | |
| 194 | |
| 195 _external_suspend = 0x20000000U, // thread is asked to self suspend | |
| 196 _ext_suspended = 0x40000000U, // thread has self-suspended | |
| 197 _deopt_suspend = 0x10000000U, // thread needs to self suspend for deopt | |
| 198 | |
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199 _has_async_exception = 0x00000001U, // there is a pending async exception |
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200 _critical_native_unlock = 0x00000002U // Must call back to unlock JNI critical lock |
| 0 | 201 }; |
| 202 | |
| 203 // various suspension related flags - atomically updated | |
| 204 // overloaded for async exception checking in check_special_condition_for_native_trans. | |
| 205 volatile uint32_t _suspend_flags; | |
| 206 | |
| 207 private: | |
| 208 int _num_nested_signal; | |
| 209 | |
| 210 public: | |
| 211 void enter_signal_handler() { _num_nested_signal++; } | |
| 212 void leave_signal_handler() { _num_nested_signal--; } | |
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213 bool is_inside_signal_handler() const { return _num_nested_signal > 0; } |
| 0 | 214 |
| 215 private: | |
| 216 // Debug tracing | |
| 217 static void trace(const char* msg, const Thread* const thread) PRODUCT_RETURN; | |
| 218 | |
| 219 // Active_handles points to a block of handles | |
| 220 JNIHandleBlock* _active_handles; | |
| 221 | |
| 222 // One-element thread local free list | |
| 223 JNIHandleBlock* _free_handle_block; | |
| 224 | |
| 225 // Point to the last handle mark | |
| 226 HandleMark* _last_handle_mark; | |
| 227 | |
| 228 // The parity of the last strong_roots iteration in which this thread was | |
| 229 // claimed as a task. | |
| 230 jint _oops_do_parity; | |
| 231 | |
| 232 public: | |
| 233 void set_last_handle_mark(HandleMark* mark) { _last_handle_mark = mark; } | |
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234 HandleMark* last_handle_mark() const { return _last_handle_mark; } |
| 0 | 235 private: |
| 236 | |
| 237 // debug support for checking if code does allow safepoints or not | |
| 238 // GC points in the VM can happen because of allocation, invoking a VM operation, or blocking on | |
| 239 // mutex, or blocking on an object synchronizer (Java locking). | |
| 240 // If !allow_safepoint(), then an assertion failure will happen in any of the above cases | |
| 241 // If !allow_allocation(), then an assertion failure will happen during allocation | |
| 242 // (Hence, !allow_safepoint() => !allow_allocation()). | |
| 243 // | |
| 244 // The two classes No_Safepoint_Verifier and No_Allocation_Verifier are used to set these counters. | |
| 245 // | |
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246 NOT_PRODUCT(int _allow_safepoint_count;) // If 0, thread allow a safepoint to happen |
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247 debug_only (int _allow_allocation_count;) // If 0, the thread is allowed to allocate oops. |
| 0 | 248 |
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249 // Used by SkipGCALot class. |
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250 NOT_PRODUCT(bool _skip_gcalot;) // Should we elide gc-a-lot? |
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251 |
| 0 | 252 friend class No_Alloc_Verifier; |
| 253 friend class No_Safepoint_Verifier; | |
| 254 friend class Pause_No_Safepoint_Verifier; | |
| 255 friend class ThreadLocalStorage; | |
| 256 friend class GC_locker; | |
| 257 | |
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258 ThreadLocalAllocBuffer _tlab; // Thread-local eden |
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259 jlong _allocated_bytes; // Cumulative number of bytes allocated on |
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260 // the Java heap |
| 0 | 261 |
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262 // Thread-local buffer used by MetadataOnStackMark. |
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263 MetadataOnStackBuffer* _metadata_on_stack_buffer; |
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264 |
| 10405 | 265 TRACE_DATA _trace_data; // Thread-local data for tracing |
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266 |
| 20393 | 267 ThreadExt _ext; |
| 268 | |
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269 int _vm_operation_started_count; // VM_Operation support |
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270 int _vm_operation_completed_count; // VM_Operation support |
| 0 | 271 |
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272 ObjectMonitor* _current_pending_monitor; // ObjectMonitor this thread |
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273 // is waiting to lock |
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274 bool _current_pending_monitor_is_from_java; // locking is from Java code |
| 0 | 275 |
| 276 // ObjectMonitor on which this thread called Object.wait() | |
| 277 ObjectMonitor* _current_waiting_monitor; | |
| 278 | |
| 279 // Private thread-local objectmonitor list - a simple cache organized as a SLL. | |
| 280 public: | |
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281 ObjectMonitor* omFreeList; |
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282 int omFreeCount; // length of omFreeList |
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283 int omFreeProvision; // reload chunk size |
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284 ObjectMonitor* omInUseList; // SLL to track monitors in circulation |
| 1587 | 285 int omInUseCount; // length of omInUseList |
| 0 | 286 |
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287 #ifdef ASSERT |
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288 private: |
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289 bool _visited_for_critical_count; |
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290 |
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291 public: |
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292 void set_visited_for_critical_count(bool z) { _visited_for_critical_count = z; } |
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293 bool was_visited_for_critical_count() const { return _visited_for_critical_count; } |
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294 #endif |
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295 |
| 0 | 296 public: |
| 297 enum { | |
| 298 is_definitely_current_thread = true | |
| 299 }; | |
| 300 | |
| 301 // Constructor | |
| 302 Thread(); | |
| 303 virtual ~Thread(); | |
| 304 | |
| 305 // initializtion | |
| 306 void initialize_thread_local_storage(); | |
| 307 | |
| 308 // thread entry point | |
| 309 virtual void run(); | |
| 310 | |
| 311 // Testers | |
| 312 virtual bool is_VM_thread() const { return false; } | |
| 313 virtual bool is_Java_thread() const { return false; } | |
| 314 virtual bool is_Compiler_thread() const { return false; } | |
| 315 virtual bool is_hidden_from_external_view() const { return false; } | |
| 316 virtual bool is_jvmti_agent_thread() const { return false; } | |
| 317 // True iff the thread can perform GC operations at a safepoint. | |
| 318 // Generally will be true only of VM thread and parallel GC WorkGang | |
| 319 // threads. | |
| 320 virtual bool is_GC_task_thread() const { return false; } | |
| 321 virtual bool is_Watcher_thread() const { return false; } | |
| 322 virtual bool is_ConcurrentGC_thread() const { return false; } | |
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323 virtual bool is_Named_thread() const { return false; } |
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324 virtual bool is_Worker_thread() const { return false; } |
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325 |
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326 // Can this thread make Java upcalls |
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327 virtual bool can_call_java() const { return false; } |
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328 |
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329 // Casts |
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330 virtual WorkerThread* as_Worker_thread() const { return NULL; } |
| 0 | 331 |
| 332 virtual char* name() const { return (char*)"Unknown thread"; } | |
| 333 | |
| 334 // Returns the current thread | |
| 335 static inline Thread* current(); | |
| 336 | |
| 337 // Common thread operations | |
| 338 static void set_priority(Thread* thread, ThreadPriority priority); | |
| 339 static ThreadPriority get_priority(const Thread* const thread); | |
| 340 static void start(Thread* thread); | |
| 341 static void interrupt(Thread* thr); | |
| 342 static bool is_interrupted(Thread* thr, bool clear_interrupted); | |
| 343 | |
| 4006 | 344 void set_native_thread_name(const char *name) { |
| 345 assert(Thread::current() == this, "set_native_thread_name can only be called on the current thread"); | |
| 346 os::set_native_thread_name(name); | |
| 347 } | |
| 348 | |
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349 ObjectMonitor** omInUseList_addr() { return (ObjectMonitor **)&omInUseList; } |
| 0 | 350 Monitor* SR_lock() const { return _SR_lock; } |
| 351 | |
| 352 bool has_async_exception() const { return (_suspend_flags & _has_async_exception) != 0; } | |
| 353 | |
| 354 void set_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 void clear_suspend_flag(SuspendFlags f) { | |
| 365 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); | |
| 366 uint32_t flags; | |
| 367 do { | |
| 368 flags = _suspend_flags; | |
| 369 } | |
| 370 while (Atomic::cmpxchg((jint)(flags & ~f), | |
| 371 (volatile jint*)&_suspend_flags, | |
| 372 (jint)flags) != (jint)flags); | |
| 373 } | |
| 374 | |
| 375 void set_has_async_exception() { | |
| 376 set_suspend_flag(_has_async_exception); | |
| 377 } | |
| 378 void clear_has_async_exception() { | |
| 379 clear_suspend_flag(_has_async_exception); | |
| 380 } | |
| 381 | |
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382 bool do_critical_native_unlock() const { return (_suspend_flags & _critical_native_unlock) != 0; } |
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383 |
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384 void set_critical_native_unlock() { |
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385 set_suspend_flag(_critical_native_unlock); |
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386 } |
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387 void clear_critical_native_unlock() { |
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388 clear_suspend_flag(_critical_native_unlock); |
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389 } |
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390 |
| 0 | 391 // Support for Unhandled Oop detection |
| 392 #ifdef CHECK_UNHANDLED_OOPS | |
| 393 private: | |
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394 UnhandledOops* _unhandled_oops; |
| 0 | 395 public: |
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396 UnhandledOops* unhandled_oops() { return _unhandled_oops; } |
| 0 | 397 // Mark oop safe for gc. It may be stack allocated but won't move. |
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398 void allow_unhandled_oop(oop *op) { |
| 0 | 399 if (CheckUnhandledOops) unhandled_oops()->allow_unhandled_oop(op); |
| 400 } | |
| 401 // Clear oops at safepoint so crashes point to unhandled oop violator | |
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402 void clear_unhandled_oops() { |
| 0 | 403 if (CheckUnhandledOops) unhandled_oops()->clear_unhandled_oops(); |
| 404 } | |
| 405 #endif // CHECK_UNHANDLED_OOPS | |
| 406 | |
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407 #ifndef PRODUCT |
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408 bool skip_gcalot() { return _skip_gcalot; } |
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409 void set_skip_gcalot(bool v) { _skip_gcalot = v; } |
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410 #endif |
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411 |
| 0 | 412 public: |
| 413 // Installs a pending exception to be inserted later | |
| 414 static void send_async_exception(oop thread_oop, oop java_throwable); | |
| 415 | |
| 416 // Resource area | |
| 417 ResourceArea* resource_area() const { return _resource_area; } | |
| 418 void set_resource_area(ResourceArea* area) { _resource_area = area; } | |
| 419 | |
| 420 OSThread* osthread() const { return _osthread; } | |
| 421 void set_osthread(OSThread* thread) { _osthread = thread; } | |
| 422 | |
| 423 // JNI handle support | |
| 424 JNIHandleBlock* active_handles() const { return _active_handles; } | |
| 425 void set_active_handles(JNIHandleBlock* block) { _active_handles = block; } | |
| 426 JNIHandleBlock* free_handle_block() const { return _free_handle_block; } | |
| 427 void set_free_handle_block(JNIHandleBlock* block) { _free_handle_block = block; } | |
| 428 | |
| 429 // Internal handle support | |
| 430 HandleArea* handle_area() const { return _handle_area; } | |
| 431 void set_handle_area(HandleArea* area) { _handle_area = area; } | |
| 432 | |
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433 GrowableArray<Metadata*>* metadata_handles() const { return _metadata_handles; } |
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434 void set_metadata_handles(GrowableArray<Metadata*>* handles){ _metadata_handles = handles; } |
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435 |
| 0 | 436 // Thread-Local Allocation Buffer (TLAB) support |
| 437 ThreadLocalAllocBuffer& tlab() { return _tlab; } | |
| 438 void initialize_tlab() { | |
| 439 if (UseTLAB) { | |
| 440 tlab().initialize(); | |
| 441 } | |
| 442 } | |
| 443 | |
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444 jlong allocated_bytes() { return _allocated_bytes; } |
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445 void set_allocated_bytes(jlong value) { _allocated_bytes = value; } |
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446 void incr_allocated_bytes(jlong size) { _allocated_bytes += size; } |
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447 inline jlong cooked_allocated_bytes(); |
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448 |
| 10405 | 449 TRACE_DATA* trace_data() { return &_trace_data; } |
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450 |
| 20393 | 451 const ThreadExt& ext() const { return _ext; } |
| 452 ThreadExt& ext() { return _ext; } | |
| 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 "cld_f->do_cld" to CLDs that are otherwise not kept alive. |
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484 // Used by JavaThread::oops_do. |
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485 // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames |
|
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486 virtual void oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf); |
| 0 | 487 |
| 488 // Handles the parallel case for the method below. | |
| 489 private: | |
| 490 bool claim_oops_do_par_case(int collection_parity); | |
| 491 public: | |
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492 // Requires that "collection_parity" is that of the current roots |
| 0 | 493 // iteration. If "is_par" is false, sets the parity of "this" to |
| 494 // "collection_parity", and returns "true". If "is_par" is true, | |
| 495 // uses an atomic instruction to set the current threads parity to | |
| 496 // "collection_parity", if it is not already. Returns "true" iff the | |
| 497 // calling thread does the update, this indicates that the calling thread | |
| 498 // has claimed the thread's stack as a root groop in the current | |
| 499 // collection. | |
| 500 bool claim_oops_do(bool is_par, int collection_parity) { | |
| 501 if (!is_par) { | |
| 502 _oops_do_parity = collection_parity; | |
| 503 return true; | |
| 504 } else { | |
| 505 return claim_oops_do_par_case(collection_parity); | |
| 506 } | |
| 507 } | |
| 508 | |
| 509 // Sweeper support | |
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510 void nmethods_do(CodeBlobClosure* cf); |
| 0 | 511 |
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512 // jvmtiRedefineClasses support |
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513 void metadata_do(void f(Metadata*)); |
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514 |
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515 // Used by fast lock support |
| 0 | 516 virtual bool is_lock_owned(address adr) const; |
| 517 | |
| 518 // Check if address is in the stack of the thread (not just for locks). | |
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519 // Warning: the method can only be used on the running thread |
| 0 | 520 bool is_in_stack(address adr) const; |
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521 // Check if address is in the usable part of the stack (excludes protected |
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522 // guard pages) |
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523 bool is_in_usable_stack(address adr) const; |
| 0 | 524 |
| 525 // Sets this thread as starting thread. Returns failure if thread | |
| 526 // creation fails due to lack of memory, too many threads etc. | |
| 527 bool set_as_starting_thread(); | |
| 528 | |
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529 void set_metadata_on_stack_buffer(MetadataOnStackBuffer* buffer) { _metadata_on_stack_buffer = buffer; } |
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530 MetadataOnStackBuffer* metadata_on_stack_buffer() const { return _metadata_on_stack_buffer; } |
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531 |
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532 protected: |
| 0 | 533 // OS data associated with the thread |
| 534 OSThread* _osthread; // Platform-specific thread information | |
| 535 | |
| 536 // Thread local resource area for temporary allocation within the VM | |
| 537 ResourceArea* _resource_area; | |
| 538 | |
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539 DEBUG_ONLY(ResourceMark* _current_resource_mark;) |
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540 |
| 0 | 541 // Thread local handle area for allocation of handles within the VM |
| 542 HandleArea* _handle_area; | |
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543 GrowableArray<Metadata*>* _metadata_handles; |
| 0 | 544 |
| 545 // Support for stack overflow handling, get_thread, etc. | |
| 546 address _stack_base; | |
| 547 size_t _stack_size; | |
| 548 uintptr_t _self_raw_id; // used by get_thread (mutable) | |
| 549 int _lgrp_id; | |
| 550 | |
| 551 public: | |
| 552 // Stack overflow support | |
| 553 address stack_base() const { assert(_stack_base != NULL,"Sanity check"); return _stack_base; } | |
| 554 | |
| 555 void set_stack_base(address base) { _stack_base = base; } | |
| 556 size_t stack_size() const { return _stack_size; } | |
| 557 void set_stack_size(size_t size) { _stack_size = size; } | |
| 558 void record_stack_base_and_size(); | |
| 559 | |
|
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560 bool on_local_stack(address adr) const { |
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561 /* QQQ this has knowledge of direction, ought to be a stack method */ |
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562 return (_stack_base >= adr && adr >= (_stack_base - _stack_size)); |
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563 } |
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564 |
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565 uintptr_t self_raw_id() { return _self_raw_id; } |
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566 void set_self_raw_id(uintptr_t value) { _self_raw_id = value; } |
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567 |
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568 int lgrp_id() const { return _lgrp_id; } |
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569 void set_lgrp_id(int value) { _lgrp_id = value; } |
| 0 | 570 |
| 571 // Printing | |
| 572 void print_on(outputStream* st) const; | |
| 573 void print() const { print_on(tty); } | |
| 574 virtual void print_on_error(outputStream* st, char* buf, int buflen) const; | |
| 575 | |
| 576 // Debug-only code | |
| 577 #ifdef ASSERT | |
| 578 private: | |
| 579 // Deadlock detection support for Mutex locks. List of locks own by thread. | |
|
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580 Monitor* _owned_locks; |
| 0 | 581 // Mutex::set_owner_implementation is the only place where _owned_locks is modified, |
| 582 // thus the friendship | |
| 583 friend class Mutex; | |
| 584 friend class Monitor; | |
| 585 | |
| 586 public: | |
| 587 void print_owned_locks_on(outputStream* st) const; | |
| 588 void print_owned_locks() const { print_owned_locks_on(tty); } | |
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589 Monitor* owned_locks() const { return _owned_locks; } |
| 0 | 590 bool owns_locks() const { return owned_locks() != NULL; } |
| 591 bool owns_locks_but_compiled_lock() const; | |
| 592 | |
| 593 // Deadlock detection | |
| 594 bool allow_allocation() { return _allow_allocation_count == 0; } | |
|
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595 ResourceMark* current_resource_mark() { return _current_resource_mark; } |
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596 void set_current_resource_mark(ResourceMark* rm) { _current_resource_mark = rm; } |
| 0 | 597 #endif |
| 598 | |
| 599 void check_for_valid_safepoint_state(bool potential_vm_operation) PRODUCT_RETURN; | |
| 600 | |
| 601 private: | |
| 602 volatile int _jvmti_env_iteration_count; | |
| 603 | |
| 604 public: | |
| 605 void entering_jvmti_env_iteration() { ++_jvmti_env_iteration_count; } | |
| 606 void leaving_jvmti_env_iteration() { --_jvmti_env_iteration_count; } | |
| 607 bool is_inside_jvmti_env_iteration() { return _jvmti_env_iteration_count > 0; } | |
| 608 | |
| 609 // Code generation | |
| 610 static ByteSize exception_file_offset() { return byte_offset_of(Thread, _exception_file ); } | |
| 611 static ByteSize exception_line_offset() { return byte_offset_of(Thread, _exception_line ); } | |
| 612 static ByteSize active_handles_offset() { return byte_offset_of(Thread, _active_handles ); } | |
| 613 | |
| 614 static ByteSize stack_base_offset() { return byte_offset_of(Thread, _stack_base ); } | |
| 615 static ByteSize stack_size_offset() { return byte_offset_of(Thread, _stack_size ); } | |
| 616 | |
| 617 #define TLAB_FIELD_OFFSET(name) \ | |
|
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618 static ByteSize tlab_##name##_offset() { return byte_offset_of(Thread, _tlab) + ThreadLocalAllocBuffer::name##_offset(); } |
| 0 | 619 |
| 620 TLAB_FIELD_OFFSET(start) | |
| 621 TLAB_FIELD_OFFSET(end) | |
| 622 TLAB_FIELD_OFFSET(top) | |
| 623 TLAB_FIELD_OFFSET(pf_top) | |
| 624 TLAB_FIELD_OFFSET(size) // desired_size | |
| 625 TLAB_FIELD_OFFSET(refill_waste_limit) | |
| 626 TLAB_FIELD_OFFSET(number_of_refills) | |
| 627 TLAB_FIELD_OFFSET(fast_refill_waste) | |
| 628 TLAB_FIELD_OFFSET(slow_allocations) | |
| 629 | |
| 630 #undef TLAB_FIELD_OFFSET | |
| 631 | |
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632 static ByteSize allocated_bytes_offset() { return byte_offset_of(Thread, _allocated_bytes ); } |
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633 |
| 0 | 634 public: |
| 635 volatile intptr_t _Stalled ; | |
| 636 volatile int _TypeTag ; | |
| 637 ParkEvent * _ParkEvent ; // for synchronized() | |
| 638 ParkEvent * _SleepEvent ; // for Thread.sleep | |
| 639 ParkEvent * _MutexEvent ; // for native internal Mutex/Monitor | |
| 640 ParkEvent * _MuxEvent ; // for low-level muxAcquire-muxRelease | |
| 641 int NativeSyncRecursion ; // diagnostic | |
| 642 | |
| 643 volatile int _OnTrap ; // Resume-at IP delta | |
| 644 jint _hashStateW ; // Marsaglia Shift-XOR thread-local RNG | |
| 645 jint _hashStateX ; // thread-specific hashCode generator state | |
| 646 jint _hashStateY ; | |
| 647 jint _hashStateZ ; | |
| 648 void * _schedctl ; | |
| 649 | |
| 650 | |
| 651 volatile jint rng [4] ; // RNG for spin loop | |
| 652 | |
| 653 // Low-level leaf-lock primitives used to implement synchronization | |
| 654 // and native monitor-mutex infrastructure. | |
| 655 // Not for general synchronization use. | |
| 656 static void SpinAcquire (volatile int * Lock, const char * Name) ; | |
| 657 static void SpinRelease (volatile int * Lock) ; | |
| 658 static void muxAcquire (volatile intptr_t * Lock, const char * Name) ; | |
| 659 static void muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) ; | |
| 660 static void muxRelease (volatile intptr_t * Lock) ; | |
| 661 }; | |
| 662 | |
| 663 // Inline implementation of Thread::current() | |
| 664 // Thread::current is "hot" it's called > 128K times in the 1st 500 msecs of | |
| 665 // startup. | |
| 666 // ThreadLocalStorage::thread is warm -- it's called > 16K times in the same | |
| 667 // period. This is inlined in thread_<os_family>.inline.hpp. | |
| 668 | |
| 669 inline Thread* Thread::current() { | |
| 670 #ifdef ASSERT | |
| 671 // This function is very high traffic. Define PARANOID to enable expensive | |
| 672 // asserts. | |
| 673 #ifdef PARANOID | |
| 674 // Signal handler should call ThreadLocalStorage::get_thread_slow() | |
| 675 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 676 assert(t != NULL && !t->is_inside_signal_handler(), | |
| 677 "Don't use Thread::current() inside signal handler"); | |
| 678 #endif | |
| 679 #endif | |
| 680 Thread* thread = ThreadLocalStorage::thread(); | |
| 681 assert(thread != NULL, "just checking"); | |
| 682 return thread; | |
| 683 } | |
| 684 | |
| 685 // Name support for threads. non-JavaThread subclasses with multiple | |
| 686 // uniquely named instances should derive from this. | |
| 687 class NamedThread: public Thread { | |
| 688 friend class VMStructs; | |
| 689 enum { | |
| 690 max_name_len = 64 | |
| 691 }; | |
| 692 private: | |
| 693 char* _name; | |
|
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694 // log JavaThread being processed by oops_do |
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695 JavaThread* _processed_thread; |
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696 |
| 0 | 697 public: |
| 698 NamedThread(); | |
| 699 ~NamedThread(); | |
| 700 // May only be called once per thread. | |
|
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701 void set_name(const char* format, ...) ATTRIBUTE_PRINTF(2, 3); |
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702 virtual bool is_Named_thread() const { return true; } |
| 0 | 703 virtual char* name() const { return _name == NULL ? (char*)"Unknown Thread" : _name; } |
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704 JavaThread *processed_thread() { return _processed_thread; } |
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705 void set_processed_thread(JavaThread *thread) { _processed_thread = thread; } |
| 0 | 706 }; |
| 707 | |
| 708 // Worker threads are named and have an id of an assigned work. | |
| 709 class WorkerThread: public NamedThread { | |
| 710 private: | |
| 711 uint _id; | |
| 712 public: | |
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713 WorkerThread() : _id(0) { } |
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714 virtual bool is_Worker_thread() const { return true; } |
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715 |
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716 virtual WorkerThread* as_Worker_thread() const { |
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717 assert(is_Worker_thread(), "Dubious cast to WorkerThread*?"); |
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718 return (WorkerThread*) this; |
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719 } |
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720 |
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721 void set_id(uint work_id) { _id = work_id; } |
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722 uint id() const { return _id; } |
| 0 | 723 }; |
| 724 | |
| 725 // A single WatcherThread is used for simulating timer interrupts. | |
| 726 class WatcherThread: public Thread { | |
| 727 friend class VMStructs; | |
| 728 public: | |
| 729 virtual void run(); | |
| 730 | |
| 731 private: | |
| 732 static WatcherThread* _watcher_thread; | |
| 733 | |
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734 static bool _startable; |
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735 volatile static bool _should_terminate; // updated without holding lock |
| 11151 | 736 |
| 737 os::WatcherThreadCrashProtection* _crash_protection; | |
| 0 | 738 public: |
| 739 enum SomeConstants { | |
| 740 delay_interval = 10 // interrupt delay in milliseconds | |
| 741 }; | |
| 742 | |
| 743 // Constructor | |
| 744 WatcherThread(); | |
| 745 | |
| 746 // Tester | |
| 747 bool is_Watcher_thread() const { return true; } | |
| 748 | |
| 749 // Printing | |
| 750 char* name() const { return (char*)"VM Periodic Task Thread"; } | |
| 751 void print_on(outputStream* st) const; | |
| 752 void print() const { print_on(tty); } | |
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753 void unpark(); |
| 0 | 754 |
| 755 // Returns the single instance of WatcherThread | |
| 756 static WatcherThread* watcher_thread() { return _watcher_thread; } | |
| 757 | |
| 758 // Create and start the single instance of WatcherThread, or stop it on shutdown | |
| 759 static void start(); | |
| 760 static void stop(); | |
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761 // Only allow start once the VM is sufficiently initialized |
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762 // Otherwise the first task to enroll will trigger the start |
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763 static void make_startable(); |
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764 |
| 11151 | 765 void set_crash_protection(os::WatcherThreadCrashProtection* crash_protection) { |
| 766 assert(Thread::current()->is_Watcher_thread(), "Can only be set by WatcherThread"); | |
| 767 _crash_protection = crash_protection; | |
| 768 } | |
| 769 | |
| 770 bool has_crash_protection() const { return _crash_protection != NULL; } | |
| 771 os::WatcherThreadCrashProtection* crash_protection() const { return _crash_protection; } | |
| 772 | |
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773 private: |
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774 int sleep() const; |
| 0 | 775 }; |
| 776 | |
| 777 | |
| 778 class CompilerThread; | |
| 779 | |
| 780 typedef void (*ThreadFunction)(JavaThread*, TRAPS); | |
| 781 | |
| 782 class JavaThread: public Thread { | |
| 783 friend class VMStructs; | |
| 784 private: | |
| 785 JavaThread* _next; // The next thread in the Threads list | |
| 786 oop _threadObj; // The Java level thread object | |
| 787 | |
| 788 #ifdef ASSERT | |
| 789 private: | |
| 790 int _java_call_counter; | |
| 791 | |
| 792 public: | |
| 793 int java_call_counter() { return _java_call_counter; } | |
| 794 void inc_java_call_counter() { _java_call_counter++; } | |
| 795 void dec_java_call_counter() { | |
| 796 assert(_java_call_counter > 0, "Invalid nesting of JavaCallWrapper"); | |
| 797 _java_call_counter--; | |
| 798 } | |
| 799 private: // restore original namespace restriction | |
| 800 #endif // ifdef ASSERT | |
| 801 | |
| 802 #ifndef PRODUCT | |
| 803 public: | |
| 804 enum { | |
| 805 jump_ring_buffer_size = 16 | |
| 806 }; | |
| 807 private: // restore original namespace restriction | |
| 808 #endif | |
| 809 | |
| 810 JavaFrameAnchor _anchor; // Encapsulation of current java frame and it state | |
| 811 | |
| 812 ThreadFunction _entry_point; | |
| 813 | |
| 814 JNIEnv _jni_environment; | |
| 815 | |
| 816 // Deopt support | |
| 817 DeoptResourceMark* _deopt_mark; // Holds special ResourceMark for deoptimization | |
| 818 | |
| 819 intptr_t* _must_deopt_id; // id of frame that needs to be deopted once we | |
| 820 // transition out of native | |
|
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821 nmethod* _deopt_nmethod; // nmethod that is currently being deoptimized |
| 0 | 822 vframeArray* _vframe_array_head; // Holds the heap of the active vframeArrays |
| 823 vframeArray* _vframe_array_last; // Holds last vFrameArray we popped | |
| 824 // Because deoptimization is lazy we must save jvmti requests to set locals | |
| 825 // in compiled frames until we deoptimize and we have an interpreter frame. | |
| 826 // This holds the pointer to array (yeah like there might be more than one) of | |
| 827 // description of compiled vframes that have locals that need to be updated. | |
| 828 GrowableArray<jvmtiDeferredLocalVariableSet*>* _deferred_locals_updates; | |
| 829 | |
| 830 // Handshake value for fixing 6243940. We need a place for the i2c | |
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831 // adapter to store the callee Method*. This value is NEVER live |
| 0 | 832 // across a gc point so it does NOT have to be gc'd |
| 833 // The handshake is open ended since we can't be certain that it will | |
| 834 // be NULLed. This is because we rarely ever see the race and end up | |
| 835 // in handle_wrong_method which is the backend of the handshake. See | |
| 836 // code in i2c adapters and handle_wrong_method. | |
| 837 | |
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838 Method* _callee_target; |
| 0 | 839 |
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840 // Used to pass back results to the interpreter or generated code running Java code. |
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841 oop _vm_result; // oop result is GC-preserved |
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842 Metadata* _vm_result_2; // non-oop result |
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843 |
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844 // See ReduceInitialCardMarks: this holds the precise space interval of |
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845 // the most recent slow path allocation for which compiled code has |
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846 // elided card-marks for performance along the fast-path. |
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847 MemRegion _deferred_card_mark; |
| 0 | 848 |
| 849 MonitorChunk* _monitor_chunks; // Contains the off stack monitors | |
| 850 // allocated during deoptimization | |
| 851 // and by JNI_MonitorEnter/Exit | |
| 852 | |
| 853 // Async. requests support | |
| 854 enum AsyncRequests { | |
| 855 _no_async_condition = 0, | |
| 856 _async_exception, | |
| 857 _async_unsafe_access_error | |
| 858 }; | |
| 859 AsyncRequests _special_runtime_exit_condition; // Enum indicating pending async. request | |
| 860 oop _pending_async_exception; | |
| 861 | |
| 862 // Safepoint support | |
| 863 public: // Expose _thread_state for SafeFetchInt() | |
| 864 volatile JavaThreadState _thread_state; | |
| 865 private: | |
| 866 ThreadSafepointState *_safepoint_state; // Holds information about a thread during a safepoint | |
| 867 address _saved_exception_pc; // Saved pc of instruction where last implicit exception happened | |
| 868 | |
| 869 // JavaThread termination support | |
| 870 enum TerminatedTypes { | |
| 871 _not_terminated = 0xDEAD - 2, | |
| 872 _thread_exiting, // JavaThread::exit() has been called for this thread | |
| 873 _thread_terminated, // JavaThread is removed from thread list | |
| 874 _vm_exited // JavaThread is still executing native code, but VM is terminated | |
| 875 // only VM_Exit can set _vm_exited | |
| 876 }; | |
| 877 | |
| 878 // In general a JavaThread's _terminated field transitions as follows: | |
| 879 // | |
| 880 // _not_terminated => _thread_exiting => _thread_terminated | |
| 881 // | |
| 882 // _vm_exited is a special value to cover the case of a JavaThread | |
| 883 // executing native code after the VM itself is terminated. | |
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884 volatile TerminatedTypes _terminated; |
| 0 | 885 // suspend/resume support |
| 886 volatile bool _suspend_equivalent; // Suspend equivalent condition | |
| 887 jint _in_deopt_handler; // count of deoptimization | |
| 888 // handlers thread is in | |
| 889 volatile bool _doing_unsafe_access; // Thread may fault due to unsafe access | |
| 890 bool _do_not_unlock_if_synchronized; // Do not unlock the receiver of a synchronized method (since it was | |
| 891 // never locked) when throwing an exception. Used by interpreter only. | |
| 892 | |
| 4006 | 893 // JNI attach states: |
| 894 enum JNIAttachStates { | |
| 895 _not_attaching_via_jni = 1, // thread is not attaching via JNI | |
| 896 _attaching_via_jni, // thread is attaching via JNI | |
| 897 _attached_via_jni // thread has attached via JNI | |
| 898 }; | |
| 899 | |
| 900 // A regular JavaThread's _jni_attach_state is _not_attaching_via_jni. | |
| 901 // A native thread that is attaching via JNI starts with a value | |
| 902 // of _attaching_via_jni and transitions to _attached_via_jni. | |
| 903 volatile JNIAttachStates _jni_attach_state; | |
| 0 | 904 |
| 905 public: | |
| 906 // State of the stack guard pages for this thread. | |
| 907 enum StackGuardState { | |
| 908 stack_guard_unused, // not needed | |
| 909 stack_guard_yellow_disabled,// disabled (temporarily) after stack overflow | |
| 910 stack_guard_enabled // enabled | |
| 911 }; | |
| 912 | |
| 913 private: | |
| 914 | |
| 22298 | 915 #if INCLUDE_JVMCI |
|
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916 // The _pending_* fields below are used to communicate extra information |
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917 // from an uncommon trap in JVMCI compiled code to the uncommon trap handler. |
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918 |
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919 // Communicates the DeoptReason and DeoptAction of the uncommon trap |
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|
920 int _pending_deoptimization; |
|
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|
921 |
|
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|
922 // Specifies whether the uncommon trap is to bci 0 of a synchronized method |
|
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|
923 // before the monitor has been acquired. |
|
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|
924 bool _pending_monitorenter; |
|
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|
925 |
|
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|
926 // Specifies if the DeoptReason for the last uncommon trap was Reason_transfer_to_interpreter |
|
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Doug Simon <doug.simon@oracle.com>
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diff
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|
927 bool _pending_transfer_to_interpreter; |
|
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|
928 |
|
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|
929 // Guard for re-entrant call to JVMCIRuntime::adjust_comp_level |
|
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|
930 bool _adjusting_comp_level; |
|
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|
931 |
|
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|
932 // An object that JVMCI compiled code can use to further describe and |
|
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Doug Simon <doug.simon@oracle.com>
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|
933 // uniquely identify the speculative optimization guarded by the uncommon trap |
|
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|
934 oop _pending_failed_speculation; |
|
24505bf61633
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|
935 |
|
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|
936 // These fields are mutually exclusive in terms of live ranges. |
|
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|
937 union { |
|
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|
938 // Communicates the pc at which the most recent implicit exception occurred |
|
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|
939 // from the signal handler to a deoptimization stub. |
|
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|
940 address _implicit_exception_pc; |
|
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|
941 |
|
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|
942 // Communicates an alternative call target to an i2c stub from a JavaCall . |
|
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|
943 address _alternate_call_target; |
|
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944 } _jvmci; |
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945 |
|
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|
946 // Support for high precision, thread sensitive counters in JVMCI compiled code. |
|
21559
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Doug Simon <doug.simon@oracle.com>
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|
947 jlong* _jvmci_counters; |
|
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948 |
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|
949 public: |
|
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|
950 static jlong* _jvmci_old_thread_counters; |
|
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|
951 static void collect_counters(typeArrayOop array); |
|
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|
952 private: |
| 22298 | 953 #endif |
| 0 | 954 |
|
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955 nmethod* _scanned_nmethod; // nmethod being scanned by the sweeper |
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956 |
|
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|
957 StackGuardState _stack_guard_state; |
|
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958 |
|
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|
959 // Precompute the limit of the stack as used in stack overflow checks. |
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960 // We load it from here to simplify the stack overflow check in assembly. |
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|
961 address _stack_overflow_limit; |
| 0 | 962 |
| 963 // Compiler exception handling (NOTE: The _exception_oop is *NOT* the same as _pending_exception. It is | |
| 964 // used to temp. parsing values into and out of the runtime system during exception handling for compiled | |
| 965 // code) | |
| 966 volatile oop _exception_oop; // Exception thrown in compiled code | |
| 967 volatile address _exception_pc; // PC where exception happened | |
| 968 volatile address _exception_handler_pc; // PC for handler of exception | |
|
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969 volatile int _is_method_handle_return; // true (== 1) if the current exception PC is a MethodHandle call site. |
| 0 | 970 |
|
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|
971 private: |
| 0 | 972 // support for JNI critical regions |
| 973 jint _jni_active_critical; // count of entries into JNI critical region | |
| 974 | |
|
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975 // Checked JNI: function name requires exception check |
|
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976 char* _pending_jni_exception_check_fn; |
|
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|
977 |
| 0 | 978 // For deadlock detection. |
| 979 int _depth_first_number; | |
| 980 | |
| 981 // JVMTI PopFrame support | |
| 982 // This is set to popframe_pending to signal that top Java frame should be popped immediately | |
| 983 int _popframe_condition; | |
| 984 | |
|
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|
985 // If reallocation of scalar replaced objects fails, we throw OOM |
|
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|
986 // and during exception propagation, pop the top |
|
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987 // _frames_to_pop_failed_realloc frames, the ones that reference |
|
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|
988 // failed reallocations. |
|
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|
989 int _frames_to_pop_failed_realloc; |
|
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|
990 |
| 0 | 991 #ifndef PRODUCT |
| 992 int _jmp_ring_index; | |
| 993 struct { | |
| 994 // We use intptr_t instead of address so debugger doesn't try and display strings | |
| 995 intptr_t _target; | |
| 996 intptr_t _instruction; | |
| 997 const char* _file; | |
| 998 int _line; | |
| 999 } _jmp_ring[ jump_ring_buffer_size ]; | |
| 1000 #endif /* PRODUCT */ | |
| 1001 | |
|
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|
1002 #if INCLUDE_ALL_GCS |
| 342 | 1003 // Support for G1 barriers |
| 1004 | |
| 1005 ObjPtrQueue _satb_mark_queue; // Thread-local log for SATB barrier. | |
| 1006 // Set of all such queues. | |
| 1007 static SATBMarkQueueSet _satb_mark_queue_set; | |
| 1008 | |
| 1009 DirtyCardQueue _dirty_card_queue; // Thread-local log for dirty cards. | |
| 1010 // Set of all such queues. | |
| 1011 static DirtyCardQueueSet _dirty_card_queue_set; | |
|
441
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1012 |
|
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|
1013 void flush_barrier_queues(); |
|
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|
1014 #endif // INCLUDE_ALL_GCS |
| 342 | 1015 |
| 0 | 1016 friend class VMThread; |
| 1017 friend class ThreadWaitTransition; | |
| 1018 friend class VM_Exit; | |
| 1019 | |
| 1020 void initialize(); // Initialized the instance variables | |
| 1021 | |
| 1022 public: | |
| 1023 // Constructor | |
| 4006 | 1024 JavaThread(bool is_attaching_via_jni = false); // for main thread and JNI attached threads |
| 0 | 1025 JavaThread(ThreadFunction entry_point, size_t stack_size = 0); |
| 1026 ~JavaThread(); | |
| 1027 | |
| 1028 #ifdef ASSERT | |
| 1029 // verify this JavaThread hasn't be published in the Threads::list yet | |
| 1030 void verify_not_published(); | |
| 1031 #endif | |
| 1032 | |
| 1033 //JNI functiontable getter/setter for JVMTI jni function table interception API. | |
| 1034 void set_jni_functions(struct JNINativeInterface_* functionTable) { | |
| 1035 _jni_environment.functions = functionTable; | |
| 1036 } | |
| 1037 struct JNINativeInterface_* get_jni_functions() { | |
| 1038 return (struct JNINativeInterface_ *)_jni_environment.functions; | |
| 1039 } | |
| 1040 | |
|
1681
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diff
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|
1041 // This function is called at thread creation to allow |
|
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diff
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|
1042 // platform specific thread variables to be initialized. |
|
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|
1043 void cache_global_variables(); |
|
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|
1044 |
| 0 | 1045 // Executes Shutdown.shutdown() |
| 1046 void invoke_shutdown_hooks(); | |
| 1047 | |
| 1048 // Cleanup on thread exit | |
| 1049 enum ExitType { | |
| 1050 normal_exit, | |
| 1051 jni_detach | |
| 1052 }; | |
| 1053 void exit(bool destroy_vm, ExitType exit_type = normal_exit); | |
| 1054 | |
| 1055 void cleanup_failed_attach_current_thread(); | |
| 1056 | |
|
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|
1057 // Track the nmethod currently being scanned by the sweeper |
|
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1058 void set_scanned_nmethod(nmethod* nm) { |
|
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1059 assert(_scanned_nmethod == NULL || nm == NULL, "should reset to NULL before writing a new value"); |
|
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1060 _scanned_nmethod = nm; |
|
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1061 } |
|
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1062 |
| 0 | 1063 // Testers |
| 1064 virtual bool is_Java_thread() const { return true; } | |
|
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|
1065 virtual bool can_call_java() const { return true; } |
| 0 | 1066 |
| 1067 // Thread chain operations | |
| 1068 JavaThread* next() const { return _next; } | |
| 1069 void set_next(JavaThread* p) { _next = p; } | |
| 1070 | |
| 1071 // Thread oop. threadObj() can be NULL for initial JavaThread | |
| 1072 // (or for threads attached via JNI) | |
| 1073 oop threadObj() const { return _threadObj; } | |
| 1074 void set_threadObj(oop p) { _threadObj = p; } | |
| 1075 | |
| 1076 ThreadPriority java_priority() const; // Read from threadObj() | |
| 1077 | |
| 1078 // Prepare thread and add to priority queue. If a priority is | |
| 1079 // not specified, use the priority of the thread object. Threads_lock | |
| 1080 // must be held while this function is called. | |
| 1081 void prepare(jobject jni_thread, ThreadPriority prio=NoPriority); | |
| 20393 | 1082 void prepare_ext(); |
| 0 | 1083 |
| 1084 void set_saved_exception_pc(address pc) { _saved_exception_pc = pc; } | |
| 1085 address saved_exception_pc() { return _saved_exception_pc; } | |
| 1086 | |
| 1087 | |
| 1088 ThreadFunction entry_point() const { return _entry_point; } | |
| 1089 | |
| 1090 // Allocates a new Java level thread object for this thread. thread_name may be NULL. | |
| 1091 void allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS); | |
| 1092 | |
| 1093 // Last frame anchor routines | |
| 1094 | |
|
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1095 JavaFrameAnchor* frame_anchor(void) { return &_anchor; } |
| 0 | 1096 |
| 1097 // last_Java_sp | |
|
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|
1098 bool has_last_Java_frame() const { return _anchor.has_last_Java_frame(); } |
|
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|
1099 intptr_t* last_Java_sp() const { return _anchor.last_Java_sp(); } |
| 0 | 1100 |
| 1101 // last_Java_pc | |
| 1102 | |
|
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|
1103 address last_Java_pc(void) { return _anchor.last_Java_pc(); } |
| 0 | 1104 |
| 1105 // Safepoint support | |
|
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|
1106 #ifndef PPC64 |
|
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|
1107 JavaThreadState thread_state() const { return _thread_state; } |
|
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1108 void set_thread_state(JavaThreadState s) { _thread_state = s; } |
|
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|
1109 #else |
|
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|
1110 // Use membars when accessing volatile _thread_state. See |
|
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|
1111 // Threads::create_vm() for size checks. |
|
20197
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|
1112 inline JavaThreadState thread_state() const; |
|
ce8f6bb717c9
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1113 inline void set_thread_state(JavaThreadState s); |
|
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|
1114 #endif |
|
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|
1115 ThreadSafepointState *safepoint_state() const { return _safepoint_state; } |
| 0 | 1116 void set_safepoint_state(ThreadSafepointState *state) { _safepoint_state = state; } |
| 1117 bool is_at_poll_safepoint() { return _safepoint_state->is_at_poll_safepoint(); } | |
| 1118 | |
| 1119 // thread has called JavaThread::exit() or is terminated | |
| 1120 bool is_exiting() { return _terminated == _thread_exiting || is_terminated(); } | |
| 1121 // thread is terminated (no longer on the threads list); we compare | |
| 1122 // against the two non-terminated values so that a freed JavaThread | |
| 1123 // will also be considered terminated. | |
| 1124 bool is_terminated() { return _terminated != _not_terminated && _terminated != _thread_exiting; } | |
| 1125 void set_terminated(TerminatedTypes t) { _terminated = t; } | |
| 1126 // special for Threads::remove() which is static: | |
| 1127 void set_terminated_value() { _terminated = _thread_terminated; } | |
| 1128 void block_if_vm_exited(); | |
| 1129 | |
| 1130 bool doing_unsafe_access() { return _doing_unsafe_access; } | |
| 1131 void set_doing_unsafe_access(bool val) { _doing_unsafe_access = val; } | |
| 1132 | |
| 1133 bool do_not_unlock_if_synchronized() { return _do_not_unlock_if_synchronized; } | |
| 1134 void set_do_not_unlock_if_synchronized(bool val) { _do_not_unlock_if_synchronized = val; } | |
| 1135 | |
| 1136 // Suspend/resume support for JavaThread | |
| 1137 private: | |
| 1138 void set_ext_suspended() { set_suspend_flag (_ext_suspended); } | |
| 1139 void clear_ext_suspended() { clear_suspend_flag(_ext_suspended); } | |
| 1140 | |
| 1141 public: | |
| 1142 void java_suspend(); | |
| 1143 void java_resume(); | |
| 1144 int java_suspend_self(); | |
| 1145 | |
| 1146 void check_and_wait_while_suspended() { | |
| 1147 assert(JavaThread::current() == this, "sanity check"); | |
| 1148 | |
| 1149 bool do_self_suspend; | |
| 1150 do { | |
| 1151 // were we externally suspended while we were waiting? | |
| 1152 do_self_suspend = handle_special_suspend_equivalent_condition(); | |
| 1153 if (do_self_suspend) { | |
| 1154 // don't surprise the thread that suspended us by returning | |
| 1155 java_suspend_self(); | |
| 1156 set_suspend_equivalent(); | |
| 1157 } | |
| 1158 } while (do_self_suspend); | |
| 1159 } | |
| 1160 static void check_safepoint_and_suspend_for_native_trans(JavaThread *thread); | |
| 1161 // Check for async exception in addition to safepoint and suspend request. | |
| 1162 static void check_special_condition_for_native_trans(JavaThread *thread); | |
| 1163 | |
|
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1164 // Same as check_special_condition_for_native_trans but finishes the |
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1165 // transition into thread_in_Java mode so that it can potentially |
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1166 // block. |
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1167 static void check_special_condition_for_native_trans_and_transition(JavaThread *thread); |
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1168 |
| 0 | 1169 bool is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits); |
| 1170 bool is_ext_suspend_completed_with_lock(uint32_t *bits) { | |
| 1171 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1172 // Warning: is_ext_suspend_completed() may temporarily drop the | |
| 1173 // SR_lock to allow the thread to reach a stable thread state if | |
| 1174 // it is currently in a transient thread state. | |
| 1175 return is_ext_suspend_completed(false /*!called_by_wait */, | |
| 1176 SuspendRetryDelay, bits); | |
| 1177 } | |
| 1178 | |
| 1179 // We cannot allow wait_for_ext_suspend_completion() to run forever or | |
| 1180 // we could hang. SuspendRetryCount and SuspendRetryDelay are normally | |
| 1181 // passed as the count and delay parameters. Experiments with specific | |
| 1182 // calls to wait_for_ext_suspend_completion() can be done by passing | |
| 1183 // other values in the code. Experiments with all calls can be done | |
| 1184 // via the appropriate -XX options. | |
| 1185 bool wait_for_ext_suspend_completion(int count, int delay, uint32_t *bits); | |
| 1186 | |
| 1187 void set_external_suspend() { set_suspend_flag (_external_suspend); } | |
| 1188 void clear_external_suspend() { clear_suspend_flag(_external_suspend); } | |
| 1189 | |
| 1190 void set_deopt_suspend() { set_suspend_flag (_deopt_suspend); } | |
| 1191 void clear_deopt_suspend() { clear_suspend_flag(_deopt_suspend); } | |
| 1192 bool is_deopt_suspend() { return (_suspend_flags & _deopt_suspend) != 0; } | |
| 1193 | |
| 1194 bool is_external_suspend() const { | |
| 1195 return (_suspend_flags & _external_suspend) != 0; | |
| 1196 } | |
| 1197 // Whenever a thread transitions from native to vm/java it must suspend | |
| 1198 // if external|deopt suspend is present. | |
| 1199 bool is_suspend_after_native() const { | |
| 1200 return (_suspend_flags & (_external_suspend | _deopt_suspend) ) != 0; | |
| 1201 } | |
| 1202 | |
| 1203 // external suspend request is completed | |
| 1204 bool is_ext_suspended() const { | |
| 1205 return (_suspend_flags & _ext_suspended) != 0; | |
| 1206 } | |
| 1207 | |
| 1208 bool is_external_suspend_with_lock() const { | |
| 1209 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1210 return is_external_suspend(); | |
| 1211 } | |
| 1212 | |
| 1213 // Special method to handle a pending external suspend request | |
| 1214 // when a suspend equivalent condition lifts. | |
| 1215 bool handle_special_suspend_equivalent_condition() { | |
| 1216 assert(is_suspend_equivalent(), | |
| 1217 "should only be called in a suspend equivalence condition"); | |
| 1218 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1219 bool ret = is_external_suspend(); | |
| 1220 if (!ret) { | |
| 1221 // not about to self-suspend so clear suspend equivalence | |
| 1222 clear_suspend_equivalent(); | |
| 1223 } | |
| 1224 // implied else: | |
| 1225 // We have a pending external suspend request so we leave the | |
| 1226 // suspend_equivalent flag set until java_suspend_self() sets | |
| 1227 // the ext_suspended flag and clears the suspend_equivalent | |
| 1228 // flag. This insures that wait_for_ext_suspend_completion() | |
| 1229 // will return consistent values. | |
| 1230 return ret; | |
| 1231 } | |
| 1232 | |
| 1233 // utility methods to see if we are doing some kind of suspension | |
| 1234 bool is_being_ext_suspended() const { | |
| 1235 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1236 return is_ext_suspended() || is_external_suspend(); | |
| 1237 } | |
| 1238 | |
| 1239 bool is_suspend_equivalent() const { return _suspend_equivalent; } | |
| 1240 | |
| 1241 void set_suspend_equivalent() { _suspend_equivalent = true; }; | |
| 1242 void clear_suspend_equivalent() { _suspend_equivalent = false; }; | |
| 1243 | |
| 1244 // Thread.stop support | |
| 1245 void send_thread_stop(oop throwable); | |
| 1246 AsyncRequests clear_special_runtime_exit_condition() { | |
| 1247 AsyncRequests x = _special_runtime_exit_condition; | |
| 1248 _special_runtime_exit_condition = _no_async_condition; | |
| 1249 return x; | |
| 1250 } | |
| 1251 | |
| 1252 // Are any async conditions present? | |
| 1253 bool has_async_condition() { return (_special_runtime_exit_condition != _no_async_condition); } | |
| 1254 | |
| 1255 void check_and_handle_async_exceptions(bool check_unsafe_error = true); | |
| 1256 | |
| 1257 // these next two are also used for self-suspension and async exception support | |
| 1258 void handle_special_runtime_exit_condition(bool check_asyncs = true); | |
| 1259 | |
| 1260 // Return true if JavaThread has an asynchronous condition or | |
| 1261 // if external suspension is requested. | |
| 1262 bool has_special_runtime_exit_condition() { | |
| 1263 // We call is_external_suspend() last since external suspend should | |
| 1264 // be less common. Because we don't use is_external_suspend_with_lock | |
| 1265 // it is possible that we won't see an asynchronous external suspend | |
| 1266 // request that has just gotten started, i.e., SR_lock grabbed but | |
| 1267 // _external_suspend field change either not made yet or not visible | |
| 1268 // yet. However, this is okay because the request is asynchronous and | |
| 1269 // we will see the new flag value the next time through. It's also | |
| 1270 // possible that the external suspend request is dropped after | |
| 1271 // we have checked is_external_suspend(), we will recheck its value | |
| 1272 // under SR_lock in java_suspend_self(). | |
| 1273 return (_special_runtime_exit_condition != _no_async_condition) || | |
| 1274 is_external_suspend() || is_deopt_suspend(); | |
| 1275 } | |
| 1276 | |
| 1277 void set_pending_unsafe_access_error() { _special_runtime_exit_condition = _async_unsafe_access_error; } | |
| 1278 | |
| 1279 void set_pending_async_exception(oop e) { | |
| 1280 _pending_async_exception = e; | |
| 1281 _special_runtime_exit_condition = _async_exception; | |
| 1282 set_has_async_exception(); | |
| 1283 } | |
| 1284 | |
| 1285 // Fast-locking support | |
| 1286 bool is_lock_owned(address adr) const; | |
| 1287 | |
| 1288 // Accessors for vframe array top | |
| 1289 // The linked list of vframe arrays are sorted on sp. This means when we | |
| 1290 // unpack the head must contain the vframe array to unpack. | |
| 1291 void set_vframe_array_head(vframeArray* value) { _vframe_array_head = value; } | |
| 1292 vframeArray* vframe_array_head() const { return _vframe_array_head; } | |
| 1293 | |
| 1294 // Side structure for defering update of java frame locals until deopt occurs | |
| 1295 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred_locals() const { return _deferred_locals_updates; } | |
| 1296 void set_deferred_locals(GrowableArray<jvmtiDeferredLocalVariableSet *>* vf) { _deferred_locals_updates = vf; } | |
| 1297 | |
| 1298 // These only really exist to make debugging deopt problems simpler | |
| 1299 | |
| 1300 void set_vframe_array_last(vframeArray* value) { _vframe_array_last = value; } | |
| 1301 vframeArray* vframe_array_last() const { return _vframe_array_last; } | |
| 1302 | |
| 1303 // The special resourceMark used during deoptimization | |
| 1304 | |
| 1305 void set_deopt_mark(DeoptResourceMark* value) { _deopt_mark = value; } | |
| 1306 DeoptResourceMark* deopt_mark(void) { return _deopt_mark; } | |
| 1307 | |
| 1308 intptr_t* must_deopt_id() { return _must_deopt_id; } | |
| 1309 void set_must_deopt_id(intptr_t* id) { _must_deopt_id = id; } | |
| 1310 void clear_must_deopt_id() { _must_deopt_id = NULL; } | |
| 1311 | |
|
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1312 void set_deopt_nmethod(nmethod* nm) { _deopt_nmethod = nm; } |
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1313 nmethod* deopt_nmethod() { return _deopt_nmethod; } |
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1314 |
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1315 Method* callee_target() const { return _callee_target; } |
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1316 void set_callee_target (Method* x) { _callee_target = x; } |
| 0 | 1317 |
| 1318 // Oop results of vm runtime calls | |
| 1319 oop vm_result() const { return _vm_result; } | |
| 1320 void set_vm_result (oop x) { _vm_result = x; } | |
| 1321 | |
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1322 Metadata* vm_result_2() const { return _vm_result_2; } |
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1323 void set_vm_result_2 (Metadata* x) { _vm_result_2 = x; } |
| 0 | 1324 |
|
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1325 MemRegion deferred_card_mark() const { return _deferred_card_mark; } |
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1326 void set_deferred_card_mark(MemRegion mr) { _deferred_card_mark = mr; } |
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1327 |
| 22298 | 1328 #if INCLUDE_JVMCI |
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1329 int pending_deoptimization() const { return _pending_deoptimization; } |
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1330 oop pending_failed_speculation() const { return _pending_failed_speculation; } |
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1331 bool adjusting_comp_level() const { return _adjusting_comp_level; } |
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1332 void set_adjusting_comp_level(bool b) { _adjusting_comp_level = b; } |
|
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1333 bool has_pending_monitorenter() const { return _pending_monitorenter; } |
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1334 void set_pending_monitorenter(bool b) { _pending_monitorenter = b; } |
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1335 void set_pending_deoptimization(int reason) { _pending_deoptimization = reason; } |
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1336 void set_pending_failed_speculation(oop failed_speculation) { _pending_failed_speculation = failed_speculation; } |
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1337 void set_pending_transfer_to_interpreter(bool b) { _pending_transfer_to_interpreter = b; } |
|
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1338 void set_jvmci_alternate_call_target(address a) { assert(_jvmci._alternate_call_target == NULL, "must be"); _jvmci._alternate_call_target = a; } |
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1339 void set_jvmci_implicit_exception_pc(address a) { assert(_jvmci._implicit_exception_pc == NULL, "must be"); _jvmci._implicit_exception_pc = a; } |
|
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1340 #endif |
|
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1341 |
| 0 | 1342 // Exception handling for compiled methods |
| 1343 oop exception_oop() const { return _exception_oop; } | |
| 1344 address exception_pc() const { return _exception_pc; } | |
| 1345 address exception_handler_pc() const { return _exception_handler_pc; } | |
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1346 bool is_method_handle_return() const { return _is_method_handle_return == 1; } |
| 0 | 1347 |
|
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1348 void set_exception_oop(oop o) { (void)const_cast<oop&>(_exception_oop = o); } |
| 0 | 1349 void set_exception_pc(address a) { _exception_pc = a; } |
| 1350 void set_exception_handler_pc(address a) { _exception_handler_pc = a; } | |
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1351 void set_is_method_handle_return(bool value) { _is_method_handle_return = value ? 1 : 0; } |
| 0 | 1352 |
|
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1353 void clear_exception_oop_and_pc() { |
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1354 set_exception_oop(NULL); |
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1355 set_exception_pc(NULL); |
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1356 } |
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1357 |
| 0 | 1358 // Stack overflow support |
| 1359 inline size_t stack_available(address cur_sp); | |
| 1360 address stack_yellow_zone_base() | |
| 1361 { return (address)(stack_base() - (stack_size() - (stack_red_zone_size() + stack_yellow_zone_size()))); } | |
| 1362 size_t stack_yellow_zone_size() | |
| 1363 { return StackYellowPages * os::vm_page_size(); } | |
| 1364 address stack_red_zone_base() | |
| 1365 { return (address)(stack_base() - (stack_size() - stack_red_zone_size())); } | |
| 1366 size_t stack_red_zone_size() | |
| 1367 { return StackRedPages * os::vm_page_size(); } | |
| 1368 bool in_stack_yellow_zone(address a) | |
| 1369 { return (a <= stack_yellow_zone_base()) && (a >= stack_red_zone_base()); } | |
| 1370 bool in_stack_red_zone(address a) | |
| 1371 { return (a <= stack_red_zone_base()) && (a >= (address)((intptr_t)stack_base() - stack_size())); } | |
| 1372 | |
| 1373 void create_stack_guard_pages(); | |
| 1374 void remove_stack_guard_pages(); | |
| 1375 | |
| 1376 void enable_stack_yellow_zone(); | |
| 1377 void disable_stack_yellow_zone(); | |
| 1378 void enable_stack_red_zone(); | |
| 1379 void disable_stack_red_zone(); | |
| 1380 | |
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1381 inline bool stack_guard_zone_unused(); |
| 0 | 1382 inline bool stack_yellow_zone_disabled(); |
| 1383 inline bool stack_yellow_zone_enabled(); | |
| 1384 | |
| 1385 // Attempt to reguard the stack after a stack overflow may have occurred. | |
| 1386 // Returns true if (a) guard pages are not needed on this thread, (b) the | |
| 1387 // pages are already guarded, or (c) the pages were successfully reguarded. | |
| 1388 // Returns false if there is not enough stack space to reguard the pages, in | |
| 1389 // which case the caller should unwind a frame and try again. The argument | |
| 1390 // should be the caller's (approximate) sp. | |
| 1391 bool reguard_stack(address cur_sp); | |
| 1392 // Similar to above but see if current stackpoint is out of the guard area | |
| 1393 // and reguard if possible. | |
| 1394 bool reguard_stack(void); | |
| 1395 | |
|
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1396 address stack_overflow_limit() { return _stack_overflow_limit; } |
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1397 void set_stack_overflow_limit() { |
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1398 _stack_overflow_limit = _stack_base - _stack_size + |
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1399 ((StackShadowPages + |
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1400 StackYellowPages + |
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1401 StackRedPages) * os::vm_page_size()); |
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1402 } |
|
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1403 |
| 0 | 1404 // Misc. accessors/mutators |
| 1405 void set_do_not_unlock(void) { _do_not_unlock_if_synchronized = true; } | |
| 1406 void clr_do_not_unlock(void) { _do_not_unlock_if_synchronized = false; } | |
| 1407 bool do_not_unlock(void) { return _do_not_unlock_if_synchronized; } | |
| 1408 | |
| 1409 #ifndef PRODUCT | |
| 1410 void record_jump(address target, address instr, const char* file, int line); | |
| 1411 #endif /* PRODUCT */ | |
| 1412 | |
| 1413 // For assembly stub generation | |
| 1414 static ByteSize threadObj_offset() { return byte_offset_of(JavaThread, _threadObj ); } | |
| 1415 #ifndef PRODUCT | |
| 1416 static ByteSize jmp_ring_index_offset() { return byte_offset_of(JavaThread, _jmp_ring_index ); } | |
| 1417 static ByteSize jmp_ring_offset() { return byte_offset_of(JavaThread, _jmp_ring ); } | |
| 1418 #endif /* PRODUCT */ | |
| 1419 static ByteSize jni_environment_offset() { return byte_offset_of(JavaThread, _jni_environment ); } | |
| 1420 static ByteSize last_Java_sp_offset() { | |
| 1421 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_sp_offset(); | |
| 1422 } | |
| 1423 static ByteSize last_Java_pc_offset() { | |
| 1424 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_pc_offset(); | |
| 1425 } | |
| 1426 static ByteSize frame_anchor_offset() { | |
| 1427 return byte_offset_of(JavaThread, _anchor); | |
| 1428 } | |
| 1429 static ByteSize callee_target_offset() { return byte_offset_of(JavaThread, _callee_target ); } | |
| 1430 static ByteSize vm_result_offset() { return byte_offset_of(JavaThread, _vm_result ); } | |
| 1431 static ByteSize vm_result_2_offset() { return byte_offset_of(JavaThread, _vm_result_2 ); } | |
| 1432 static ByteSize thread_state_offset() { return byte_offset_of(JavaThread, _thread_state ); } | |
| 1433 static ByteSize saved_exception_pc_offset() { return byte_offset_of(JavaThread, _saved_exception_pc ); } | |
| 1434 static ByteSize osthread_offset() { return byte_offset_of(JavaThread, _osthread ); } | |
| 22298 | 1435 #if INCLUDE_JVMCI |
|
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1436 static ByteSize pending_deoptimization_offset() { return byte_offset_of(JavaThread, _pending_deoptimization); } |
|
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1437 static ByteSize pending_monitorenter_offset() { return byte_offset_of(JavaThread, _pending_monitorenter); } |
|
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|
1438 static ByteSize pending_failed_speculation_offset() { return byte_offset_of(JavaThread, _pending_failed_speculation); } |
|
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|
1439 static ByteSize jvmci_alternate_call_target_offset() { return byte_offset_of(JavaThread, _jvmci._alternate_call_target); } |
|
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|
1440 static ByteSize jvmci_implicit_exception_pc_offset() { return byte_offset_of(JavaThread, _jvmci._implicit_exception_pc); } |
|
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1441 static ByteSize jvmci_counters_offset() { return byte_offset_of(JavaThread, _jvmci_counters ); } |
| 22298 | 1442 #endif |
| 0 | 1443 static ByteSize exception_oop_offset() { return byte_offset_of(JavaThread, _exception_oop ); } |
| 1444 static ByteSize exception_pc_offset() { return byte_offset_of(JavaThread, _exception_pc ); } | |
| 1445 static ByteSize exception_handler_pc_offset() { return byte_offset_of(JavaThread, _exception_handler_pc); } | |
|
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1446 static ByteSize stack_overflow_limit_offset() { return byte_offset_of(JavaThread, _stack_overflow_limit); } |
|
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1447 static ByteSize is_method_handle_return_offset() { return byte_offset_of(JavaThread, _is_method_handle_return); } |
| 0 | 1448 static ByteSize stack_guard_state_offset() { return byte_offset_of(JavaThread, _stack_guard_state ); } |
| 1449 static ByteSize suspend_flags_offset() { return byte_offset_of(JavaThread, _suspend_flags ); } | |
| 1450 | |
| 1451 static ByteSize do_not_unlock_if_synchronized_offset() { return byte_offset_of(JavaThread, _do_not_unlock_if_synchronized); } | |
|
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|
1452 static ByteSize should_post_on_exceptions_flag_offset() { |
|
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1453 return byte_offset_of(JavaThread, _should_post_on_exceptions_flag); |
|
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|
1454 } |
| 0 | 1455 |
|
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|
1456 #if INCLUDE_ALL_GCS |
| 342 | 1457 static ByteSize satb_mark_queue_offset() { return byte_offset_of(JavaThread, _satb_mark_queue); } |
| 1458 static ByteSize dirty_card_queue_offset() { return byte_offset_of(JavaThread, _dirty_card_queue); } | |
|
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1459 #endif // INCLUDE_ALL_GCS |
| 342 | 1460 |
| 0 | 1461 // Returns the jni environment for this thread |
| 1462 JNIEnv* jni_environment() { return &_jni_environment; } | |
| 1463 | |
| 1464 static JavaThread* thread_from_jni_environment(JNIEnv* env) { | |
| 1465 JavaThread *thread_from_jni_env = (JavaThread*)((intptr_t)env - in_bytes(jni_environment_offset())); | |
| 1466 // Only return NULL if thread is off the thread list; starting to | |
| 1467 // exit should not return NULL. | |
| 1468 if (thread_from_jni_env->is_terminated()) { | |
| 1469 thread_from_jni_env->block_if_vm_exited(); | |
| 1470 return NULL; | |
| 1471 } else { | |
| 1472 return thread_from_jni_env; | |
| 1473 } | |
| 1474 } | |
| 1475 | |
| 1476 // JNI critical regions. These can nest. | |
| 1477 bool in_critical() { return _jni_active_critical > 0; } | |
|
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|
1478 bool in_last_critical() { return _jni_active_critical == 1; } |
|
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|
1479 void enter_critical() { assert(Thread::current() == this || |
|
0382d2b469b2
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|
1480 Thread::current()->is_VM_thread() && SafepointSynchronize::is_synchronizing(), |
|
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|
1481 "this must be current thread or synchronizing"); |
| 0 | 1482 _jni_active_critical++; } |
| 1483 void exit_critical() { assert(Thread::current() == this, | |
| 1484 "this must be current thread"); | |
| 1485 _jni_active_critical--; | |
| 1486 assert(_jni_active_critical >= 0, | |
| 1487 "JNI critical nesting problem?"); } | |
| 1488 | |
|
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d68158e12cea
8043224: -Xcheck:jni improvements to exception checking and excessive local refs
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|
1489 // Checked JNI, is the programmer required to check for exceptions, specify which function name |
|
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|
1490 bool is_pending_jni_exception_check() const { return _pending_jni_exception_check_fn != NULL; } |
|
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|
1491 void clear_pending_jni_exception_check() { _pending_jni_exception_check_fn = NULL; } |
|
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|
1492 const char* get_pending_jni_exception_check() const { return _pending_jni_exception_check_fn; } |
|
d68158e12cea
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|
1493 void set_pending_jni_exception_check(const char* fn_name) { _pending_jni_exception_check_fn = (char*) fn_name; } |
|
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|
1494 |
| 0 | 1495 // For deadlock detection |
| 1496 int depth_first_number() { return _depth_first_number; } | |
| 1497 void set_depth_first_number(int dfn) { _depth_first_number = dfn; } | |
| 1498 | |
| 1499 private: | |
| 1500 void set_monitor_chunks(MonitorChunk* monitor_chunks) { _monitor_chunks = monitor_chunks; } | |
| 1501 | |
| 1502 public: | |
| 1503 MonitorChunk* monitor_chunks() const { return _monitor_chunks; } | |
| 1504 void add_monitor_chunk(MonitorChunk* chunk); | |
| 1505 void remove_monitor_chunk(MonitorChunk* chunk); | |
| 1506 bool in_deopt_handler() const { return _in_deopt_handler > 0; } | |
| 1507 void inc_in_deopt_handler() { _in_deopt_handler++; } | |
| 1508 void dec_in_deopt_handler() { | |
| 1509 assert(_in_deopt_handler > 0, "mismatched deopt nesting"); | |
| 1510 if (_in_deopt_handler > 0) { // robustness | |
| 1511 _in_deopt_handler--; | |
| 1512 } | |
| 1513 } | |
| 1514 | |
| 1515 private: | |
| 1516 void set_entry_point(ThreadFunction entry_point) { _entry_point = entry_point; } | |
| 1517 | |
| 1518 public: | |
| 1519 | |
| 1520 // Frame iteration; calls the function f for all frames on the stack | |
| 1521 void frames_do(void f(frame*, const RegisterMap*)); | |
| 1522 | |
| 1523 // Memory operations | |
|
20259
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8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do
stefank
parents:
20197
diff
changeset
|
1524 void oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf); |
| 0 | 1525 |
| 1526 // Sweeper operations | |
|
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6863023: need non-perm oops in code cache for JSR 292
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844
diff
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|
1527 void nmethods_do(CodeBlobClosure* cf); |
| 0 | 1528 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6197
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|
1529 // RedefineClasses Support |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
1530 void metadata_do(void f(Metadata*)); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1531 |
| 0 | 1532 // Memory management operations |
| 1533 void gc_epilogue(); | |
| 1534 void gc_prologue(); | |
| 1535 | |
| 1536 // Misc. operations | |
| 1537 char* name() const { return (char*)get_thread_name(); } | |
| 1538 void print_on(outputStream* st) const; | |
| 1539 void print() const { print_on(tty); } | |
| 1540 void print_value(); | |
| 1541 void print_thread_state_on(outputStream* ) const PRODUCT_RETURN; | |
| 1542 void print_thread_state() const PRODUCT_RETURN; | |
| 1543 void print_on_error(outputStream* st, char* buf, int buflen) const; | |
| 1544 void verify(); | |
| 1545 const char* get_thread_name() const; | |
| 1546 private: | |
| 1547 // factor out low-level mechanics for use in both normal and error cases | |
| 1548 const char* get_thread_name_string(char* buf = NULL, int buflen = 0) const; | |
| 1549 public: | |
| 1550 const char* get_threadgroup_name() const; | |
| 1551 const char* get_parent_name() const; | |
| 1552 | |
| 1553 // Accessing frames | |
| 1554 frame last_frame() { | |
| 1555 _anchor.make_walkable(this); | |
| 1556 return pd_last_frame(); | |
| 1557 } | |
| 1558 javaVFrame* last_java_vframe(RegisterMap* reg_map); | |
| 1559 | |
| 1560 // Returns method at 'depth' java or native frames down the stack | |
| 1561 // Used for security checks | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6197
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|
1562 Klass* security_get_caller_class(int depth); |
| 0 | 1563 |
| 1564 // Print stack trace in external format | |
| 1565 void print_stack_on(outputStream* st); | |
| 1566 void print_stack() { print_stack_on(tty); } | |
| 1567 | |
| 1568 // Print stack traces in various internal formats | |
| 1569 void trace_stack() PRODUCT_RETURN; | |
| 1570 void trace_stack_from(vframe* start_vf) PRODUCT_RETURN; | |
| 1571 void trace_frames() PRODUCT_RETURN; | |
|
3908
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
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|
1572 void trace_oops() PRODUCT_RETURN; |
| 0 | 1573 |
|
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2195
diff
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|
1574 // Print an annotated view of the stack frames |
|
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
1575 void print_frame_layout(int depth = 0, bool validate_only = false) NOT_DEBUG_RETURN; |
|
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2195
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changeset
|
1576 void validate_frame_layout() { |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
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2195
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|
1577 print_frame_layout(0, true); |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2195
diff
changeset
|
1578 } |
|
2e038ad0c1d0
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never
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2195
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changeset
|
1579 |
| 0 | 1580 // Returns the number of stack frames on the stack |
| 1581 int depth() const; | |
| 1582 | |
| 1583 // Function for testing deoptimization | |
| 1584 void deoptimize(); | |
| 1585 void make_zombies(); | |
| 1586 | |
| 1587 void deoptimized_wrt_marked_nmethods(); | |
| 1588 | |
| 1589 // Profiling operation (see fprofile.cpp) | |
| 1590 public: | |
| 1591 bool profile_last_Java_frame(frame* fr); | |
| 1592 | |
| 1593 private: | |
| 1594 ThreadProfiler* _thread_profiler; | |
| 1595 private: | |
| 1596 friend class FlatProfiler; // uses both [gs]et_thread_profiler. | |
| 1597 friend class FlatProfilerTask; // uses get_thread_profiler. | |
| 1598 friend class ThreadProfilerMark; // uses get_thread_profiler. | |
| 1599 ThreadProfiler* get_thread_profiler() { return _thread_profiler; } | |
| 1600 ThreadProfiler* set_thread_profiler(ThreadProfiler* tp) { | |
| 1601 ThreadProfiler* result = _thread_profiler; | |
| 1602 _thread_profiler = tp; | |
| 1603 return result; | |
| 1604 } | |
| 1605 | |
| 1606 public: | |
| 1607 // Returns the running thread as a JavaThread | |
| 1608 static inline JavaThread* current(); | |
| 1609 | |
| 1610 // Returns the active Java thread. Do not use this if you know you are calling | |
| 1611 // from a JavaThread, as it's slower than JavaThread::current. If called from | |
| 1612 // the VMThread, it also returns the JavaThread that instigated the VMThread's | |
| 1613 // operation. You may not want that either. | |
| 1614 static JavaThread* active(); | |
| 1615 | |
| 1616 inline CompilerThread* as_CompilerThread(); | |
| 1617 | |
| 1618 public: | |
| 1619 virtual void run(); | |
| 1620 void thread_main_inner(); | |
| 1621 | |
| 1622 private: | |
| 1623 // PRIVILEGED STACK | |
| 1624 PrivilegedElement* _privileged_stack_top; | |
| 1625 GrowableArray<oop>* _array_for_gc; | |
| 1626 public: | |
| 1627 | |
| 1628 // Returns the privileged_stack information. | |
| 1629 PrivilegedElement* privileged_stack_top() const { return _privileged_stack_top; } | |
| 1630 void set_privileged_stack_top(PrivilegedElement *e) { _privileged_stack_top = e; } | |
| 1631 void register_array_for_gc(GrowableArray<oop>* array) { _array_for_gc = array; } | |
| 1632 | |
| 1633 public: | |
| 1634 // Thread local information maintained by JVMTI. | |
| 1635 void set_jvmti_thread_state(JvmtiThreadState *value) { _jvmti_thread_state = value; } | |
|
609
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6800721: 3/4 JavaThread::jvmti_thread_state() and JvmtiThreadState::state_for() robustness
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|
1636 // A JvmtiThreadState is lazily allocated. This jvmti_thread_state() |
|
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|
1637 // getter is used to get this JavaThread's JvmtiThreadState if it has |
|
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6800721: 3/4 JavaThread::jvmti_thread_state() and JvmtiThreadState::state_for() robustness
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|
1638 // one which means NULL can be returned. JvmtiThreadState::state_for() |
|
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|
1639 // is used to get the specified JavaThread's JvmtiThreadState if it has |
|
ea20d7ce26b0
6800721: 3/4 JavaThread::jvmti_thread_state() and JvmtiThreadState::state_for() robustness
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|
1640 // one or it allocates a new JvmtiThreadState for the JavaThread and |
|
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|
1641 // returns it. JvmtiThreadState::state_for() will return NULL only if |
|
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|
1642 // the specified JavaThread is exiting. |
| 0 | 1643 JvmtiThreadState *jvmti_thread_state() const { return _jvmti_thread_state; } |
| 1644 static ByteSize jvmti_thread_state_offset() { return byte_offset_of(JavaThread, _jvmti_thread_state); } | |
| 1645 void set_jvmti_get_loaded_classes_closure(JvmtiGetLoadedClassesClosure* value) { _jvmti_get_loaded_classes_closure = value; } | |
| 1646 JvmtiGetLoadedClassesClosure* get_jvmti_get_loaded_classes_closure() const { return _jvmti_get_loaded_classes_closure; } | |
| 1647 | |
| 1648 // JVMTI PopFrame support | |
| 1649 // Setting and clearing popframe_condition | |
| 1650 // All of these enumerated values are bits. popframe_pending | |
| 1651 // indicates that a PopFrame() has been requested and not yet been | |
| 1652 // completed. popframe_processing indicates that that PopFrame() is in | |
| 1653 // the process of being completed. popframe_force_deopt_reexecution_bit | |
| 1654 // indicates that special handling is required when returning to a | |
| 1655 // deoptimized caller. | |
| 1656 enum PopCondition { | |
| 1657 popframe_inactive = 0x00, | |
| 1658 popframe_pending_bit = 0x01, | |
| 1659 popframe_processing_bit = 0x02, | |
| 1660 popframe_force_deopt_reexecution_bit = 0x04 | |
| 1661 }; | |
| 1662 PopCondition popframe_condition() { return (PopCondition) _popframe_condition; } | |
| 1663 void set_popframe_condition(PopCondition c) { _popframe_condition = c; } | |
| 1664 void set_popframe_condition_bit(PopCondition c) { _popframe_condition |= c; } | |
| 1665 void clear_popframe_condition() { _popframe_condition = popframe_inactive; } | |
| 1666 static ByteSize popframe_condition_offset() { return byte_offset_of(JavaThread, _popframe_condition); } | |
| 1667 bool has_pending_popframe() { return (popframe_condition() & popframe_pending_bit) != 0; } | |
| 1668 bool popframe_forcing_deopt_reexecution() { return (popframe_condition() & popframe_force_deopt_reexecution_bit) != 0; } | |
| 1669 void clear_popframe_forcing_deopt_reexecution() { _popframe_condition &= ~popframe_force_deopt_reexecution_bit; } | |
| 1670 #ifdef CC_INTERP | |
| 1671 bool pop_frame_pending(void) { return ((_popframe_condition & popframe_pending_bit) != 0); } | |
| 1672 void clr_pop_frame_pending(void) { _popframe_condition = popframe_inactive; } | |
| 1673 bool pop_frame_in_process(void) { return ((_popframe_condition & popframe_processing_bit) != 0); } | |
| 1674 void set_pop_frame_in_process(void) { _popframe_condition |= popframe_processing_bit; } | |
| 1675 void clr_pop_frame_in_process(void) { _popframe_condition &= ~popframe_processing_bit; } | |
| 1676 #endif | |
| 1677 | |
|
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6898462: The escape analysis with G1 cause crash assertion src/share/vm/runtime/vframeArray.cpp:94
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20619
diff
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|
1678 int frames_to_pop_failed_realloc() const { return _frames_to_pop_failed_realloc; } |
|
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1679 void set_frames_to_pop_failed_realloc(int nb) { _frames_to_pop_failed_realloc = nb; } |
|
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|
1680 void dec_frames_to_pop_failed_realloc() { _frames_to_pop_failed_realloc--; } |
|
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|
1681 |
| 0 | 1682 private: |
| 1683 // Saved incoming arguments to popped frame. | |
| 1684 // Used only when popped interpreted frame returns to deoptimized frame. | |
| 1685 void* _popframe_preserved_args; | |
| 1686 int _popframe_preserved_args_size; | |
| 1687 | |
| 1688 public: | |
| 1689 void popframe_preserve_args(ByteSize size_in_bytes, void* start); | |
| 1690 void* popframe_preserved_args(); | |
| 1691 ByteSize popframe_preserved_args_size(); | |
| 1692 WordSize popframe_preserved_args_size_in_words(); | |
| 1693 void popframe_free_preserved_args(); | |
| 1694 | |
| 1695 | |
| 1696 private: | |
| 1697 JvmtiThreadState *_jvmti_thread_state; | |
| 1698 JvmtiGetLoadedClassesClosure* _jvmti_get_loaded_classes_closure; | |
| 1699 | |
| 1700 // Used by the interpreter in fullspeed mode for frame pop, method | |
| 1701 // entry, method exit and single stepping support. This field is | |
| 1702 // only set to non-zero by the VM_EnterInterpOnlyMode VM operation. | |
| 1703 // It can be set to zero asynchronously (i.e., without a VM operation | |
| 1704 // or a lock) so we have to be very careful. | |
| 1705 int _interp_only_mode; | |
| 1706 | |
| 1707 public: | |
| 1708 // used by the interpreter for fullspeed debugging support (see above) | |
| 1709 static ByteSize interp_only_mode_offset() { return byte_offset_of(JavaThread, _interp_only_mode); } | |
| 1710 bool is_interp_only_mode() { return (_interp_only_mode != 0); } | |
| 1711 int get_interp_only_mode() { return _interp_only_mode; } | |
| 1712 void increment_interp_only_mode() { ++_interp_only_mode; } | |
| 1713 void decrement_interp_only_mode() { --_interp_only_mode; } | |
| 1714 | |
|
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1715 // support for cached flag that indicates whether exceptions need to be posted for this thread |
|
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|
1716 // if this is false, we can avoid deoptimizing when events are thrown |
|
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|
1717 // this gets set to reflect whether jvmtiExport::post_exception_throw would actually do anything |
|
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|
1718 private: |
|
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|
1719 int _should_post_on_exceptions_flag; |
|
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|
1720 |
|
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|
1721 public: |
|
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|
1722 int should_post_on_exceptions_flag() { return _should_post_on_exceptions_flag; } |
|
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|
1723 void set_should_post_on_exceptions_flag(int val) { _should_post_on_exceptions_flag = val; } |
|
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|
1724 |
| 0 | 1725 private: |
| 1726 ThreadStatistics *_thread_stat; | |
| 1727 | |
| 1728 public: | |
| 1729 ThreadStatistics* get_thread_stat() const { return _thread_stat; } | |
| 1730 | |
| 1731 // Return a blocker object for which this thread is blocked parking. | |
| 1732 oop current_park_blocker(); | |
| 1733 | |
| 1734 private: | |
| 1735 static size_t _stack_size_at_create; | |
| 1736 | |
| 1737 public: | |
| 1738 static inline size_t stack_size_at_create(void) { | |
| 1739 return _stack_size_at_create; | |
| 1740 } | |
| 1741 static inline void set_stack_size_at_create(size_t value) { | |
| 1742 _stack_size_at_create = value; | |
| 1743 } | |
| 1744 | |
|
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|
1745 #if INCLUDE_ALL_GCS |
| 342 | 1746 // SATB marking queue support |
| 1747 ObjPtrQueue& satb_mark_queue() { return _satb_mark_queue; } | |
| 1748 static SATBMarkQueueSet& satb_mark_queue_set() { | |
| 1749 return _satb_mark_queue_set; | |
| 1750 } | |
| 1751 | |
| 1752 // Dirty card queue support | |
| 1753 DirtyCardQueue& dirty_card_queue() { return _dirty_card_queue; } | |
| 1754 static DirtyCardQueueSet& dirty_card_queue_set() { | |
| 1755 return _dirty_card_queue_set; | |
| 1756 } | |
|
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|
1757 #endif // INCLUDE_ALL_GCS |
| 342 | 1758 |
|
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|
1759 // This method initializes the SATB and dirty card queues before a |
|
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|
1760 // JavaThread is added to the Java thread list. Right now, we don't |
|
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|
1761 // have to do anything to the dirty card queue (it should have been |
|
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|
1762 // activated when the thread was created), but we have to activate |
|
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|
1763 // the SATB queue if the thread is created while a marking cycle is |
|
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|
1764 // in progress. The activation / de-activation of the SATB queues at |
|
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|
1765 // the beginning / end of a marking cycle is done during safepoints |
|
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1766 // so we have to make sure this method is called outside one to be |
|
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1767 // able to safely read the active field of the SATB queue set. Right |
|
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|
1768 // now, it is called just before the thread is added to the Java |
|
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1769 // thread list in the Threads::add() method. That method is holding |
|
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|
1770 // the Threads_lock which ensures we are outside a safepoint. We |
|
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|
1771 // cannot do the obvious and set the active field of the SATB queue |
|
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1772 // when the thread is created given that, in some cases, safepoints |
|
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|
1773 // might happen between the JavaThread constructor being called and the |
|
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1774 // thread being added to the Java thread list (an example of this is |
|
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|
1775 // when the structure for the DestroyJavaVM thread is created). |
|
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1776 #if INCLUDE_ALL_GCS |
|
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|
1777 void initialize_queues(); |
|
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1778 #else // INCLUDE_ALL_GCS |
|
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|
1779 void initialize_queues() { } |
|
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1780 #endif // INCLUDE_ALL_GCS |
|
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|
1781 |
| 0 | 1782 // Machine dependent stuff |
| 1972 | 1783 #ifdef TARGET_OS_ARCH_linux_x86 |
| 1784 # include "thread_linux_x86.hpp" | |
| 1785 #endif | |
| 1786 #ifdef TARGET_OS_ARCH_linux_sparc | |
| 1787 # include "thread_linux_sparc.hpp" | |
| 1788 #endif | |
| 1789 #ifdef TARGET_OS_ARCH_linux_zero | |
| 1790 # include "thread_linux_zero.hpp" | |
| 1791 #endif | |
| 1792 #ifdef TARGET_OS_ARCH_solaris_x86 | |
| 1793 # include "thread_solaris_x86.hpp" | |
| 1794 #endif | |
| 1795 #ifdef TARGET_OS_ARCH_solaris_sparc | |
| 1796 # include "thread_solaris_sparc.hpp" | |
| 1797 #endif | |
| 1798 #ifdef TARGET_OS_ARCH_windows_x86 | |
| 1799 # include "thread_windows_x86.hpp" | |
| 1800 #endif | |
|
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1801 #ifdef TARGET_OS_ARCH_linux_arm |
|
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1802 # include "thread_linux_arm.hpp" |
|
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1803 #endif |
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1804 #ifdef TARGET_OS_ARCH_linux_ppc |
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1805 # include "thread_linux_ppc.hpp" |
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1806 #endif |
| 14411 | 1807 #ifdef TARGET_OS_ARCH_aix_ppc |
| 1808 # include "thread_aix_ppc.hpp" | |
| 1809 #endif | |
| 3960 | 1810 #ifdef TARGET_OS_ARCH_bsd_x86 |
| 1811 # include "thread_bsd_x86.hpp" | |
| 1812 #endif | |
| 1813 #ifdef TARGET_OS_ARCH_bsd_zero | |
| 1814 # include "thread_bsd_zero.hpp" | |
| 1815 #endif | |
| 1972 | 1816 |
| 0 | 1817 |
| 1818 public: | |
| 1819 void set_blocked_on_compilation(bool value) { | |
| 1820 _blocked_on_compilation = value; | |
| 1821 } | |
| 1822 | |
| 1823 bool blocked_on_compilation() { | |
| 1824 return _blocked_on_compilation; | |
| 1825 } | |
| 1826 protected: | |
| 1827 bool _blocked_on_compilation; | |
| 1828 | |
| 1829 | |
| 1830 // JSR166 per-thread parker | |
| 1831 private: | |
| 1832 Parker* _parker; | |
| 1833 public: | |
| 1834 Parker* parker() { return _parker; } | |
| 1835 | |
| 1836 // Biased locking support | |
| 1837 private: | |
| 1838 GrowableArray<MonitorInfo*>* _cached_monitor_info; | |
| 1839 public: | |
| 1840 GrowableArray<MonitorInfo*>* cached_monitor_info() { return _cached_monitor_info; } | |
| 1841 void set_cached_monitor_info(GrowableArray<MonitorInfo*>* info) { _cached_monitor_info = info; } | |
| 1842 | |
| 1843 // clearing/querying jni attach status | |
| 4006 | 1844 bool is_attaching_via_jni() const { return _jni_attach_state == _attaching_via_jni; } |
| 1845 bool has_attached_via_jni() const { return is_attaching_via_jni() || _jni_attach_state == _attached_via_jni; } | |
|
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1846 inline void set_done_attaching_via_jni(); |
| 342 | 1847 private: |
| 1848 // This field is used to determine if a thread has claimed | |
|
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1849 // a par_id: it is UINT_MAX if the thread has not claimed a par_id; |
| 342 | 1850 // otherwise its value is the par_id that has been claimed. |
|
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1851 uint _claimed_par_id; |
| 342 | 1852 public: |
|
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1853 uint get_claimed_par_id() { return _claimed_par_id; } |
|
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1854 void set_claimed_par_id(uint id) { _claimed_par_id = id;} |
| 0 | 1855 }; |
| 1856 | |
| 1857 // Inline implementation of JavaThread::current | |
| 1858 inline JavaThread* JavaThread::current() { | |
| 1859 Thread* thread = ThreadLocalStorage::thread(); | |
| 1860 assert(thread != NULL && thread->is_Java_thread(), "just checking"); | |
| 1861 return (JavaThread*)thread; | |
| 1862 } | |
| 1863 | |
| 1864 inline CompilerThread* JavaThread::as_CompilerThread() { | |
| 1865 assert(is_Compiler_thread(), "just checking"); | |
| 1866 return (CompilerThread*)this; | |
| 1867 } | |
| 1868 | |
|
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1869 inline bool JavaThread::stack_guard_zone_unused() { |
|
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1870 return _stack_guard_state == stack_guard_unused; |
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1871 } |
|
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|
1872 |
| 0 | 1873 inline bool JavaThread::stack_yellow_zone_disabled() { |
| 1874 return _stack_guard_state == stack_guard_yellow_disabled; | |
| 1875 } | |
| 1876 | |
| 1877 inline bool JavaThread::stack_yellow_zone_enabled() { | |
| 1878 #ifdef ASSERT | |
| 1879 if (os::uses_stack_guard_pages()) { | |
| 1880 assert(_stack_guard_state != stack_guard_unused, "guard pages must be in use"); | |
| 1881 } | |
| 1882 #endif | |
| 1883 return _stack_guard_state == stack_guard_enabled; | |
| 1884 } | |
| 1885 | |
| 1886 inline size_t JavaThread::stack_available(address cur_sp) { | |
| 1887 // This code assumes java stacks grow down | |
| 1888 address low_addr; // Limit on the address for deepest stack depth | |
| 1889 if ( _stack_guard_state == stack_guard_unused) { | |
| 1890 low_addr = stack_base() - stack_size(); | |
| 1891 } else { | |
| 1892 low_addr = stack_yellow_zone_base(); | |
| 1893 } | |
| 1894 return cur_sp > low_addr ? cur_sp - low_addr : 0; | |
| 1895 } | |
| 1896 | |
| 1897 // A thread used for Compilation. | |
| 1898 class CompilerThread : public JavaThread { | |
| 1899 friend class VMStructs; | |
| 1900 private: | |
| 1901 CompilerCounters* _counters; | |
| 1902 | |
|
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1903 ciEnv* _env; |
|
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1904 CompileLog* _log; |
|
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1905 CompileTask* _task; |
|
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|
1906 CompileQueue* _queue; |
|
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|
1907 BufferBlob* _buffer_blob; |
| 0 | 1908 |
|
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|
1909 nmethod* _scanned_nmethod; // nmethod being scanned by the sweeper |
|
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|
1910 AbstractCompiler* _compiler; |
|
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|
1911 |
| 0 | 1912 public: |
| 1913 | |
| 1914 static CompilerThread* current(); | |
| 1915 | |
| 1916 CompilerThread(CompileQueue* queue, CompilerCounters* counters); | |
| 1917 | |
| 1918 bool is_Compiler_thread() const { return true; } | |
|
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1919 |
|
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1920 #if INCLUDE_JVMCI |
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|
1921 virtual bool can_call_java() const; |
|
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|
1922 #else |
|
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|
1923 virtual bool can_call_java() const { return false; } |
|
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|
1924 #endif |
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|
1925 |
|
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|
1926 // Hide native compiler threads from external view. |
|
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|
1927 bool is_hidden_from_external_view() const { return !can_call_java(); } |
| 0 | 1928 |
|
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1929 void set_compiler(AbstractCompiler* c) { _compiler = c; } |
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1930 AbstractCompiler* compiler() const { return _compiler; } |
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1931 |
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1932 CompileQueue* queue() const { return _queue; } |
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1933 CompilerCounters* counters() const { return _counters; } |
| 0 | 1934 |
| 1935 // Get/set the thread's compilation environment. | |
| 1936 ciEnv* env() { return _env; } | |
| 1937 void set_env(ciEnv* env) { _env = env; } | |
| 1938 | |
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1939 BufferBlob* get_buffer_blob() const { return _buffer_blob; } |
| 1584 | 1940 void set_buffer_blob(BufferBlob* b) { _buffer_blob = b; }; |
| 1941 | |
| 0 | 1942 // Get/set the thread's logging information |
| 1943 CompileLog* log() { return _log; } | |
| 1944 void init_log(CompileLog* log) { | |
| 1945 // Set once, for good. | |
| 1946 assert(_log == NULL, "set only once"); | |
| 1947 _log = log; | |
| 1948 } | |
| 1949 | |
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1950 // GC support |
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1951 // Apply "f->do_oop" to all root oops in "this". |
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1952 // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames |
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1953 void oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf); |
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1954 |
| 0 | 1955 #ifndef PRODUCT |
| 1956 private: | |
| 1957 IdealGraphPrinter *_ideal_graph_printer; | |
| 1958 public: | |
| 1959 IdealGraphPrinter *ideal_graph_printer() { return _ideal_graph_printer; } | |
| 1960 void set_ideal_graph_printer(IdealGraphPrinter *n) { _ideal_graph_printer = n; } | |
| 1961 #endif | |
| 1962 | |
| 1963 // Get/set the thread's current task | |
| 1964 CompileTask* task() { return _task; } | |
| 1965 void set_task(CompileTask* task) { _task = task; } | |
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1966 |
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1967 // Track the nmethod currently being scanned by the sweeper |
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1968 void set_scanned_nmethod(nmethod* nm) { |
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1969 assert(_scanned_nmethod == NULL || nm == NULL, "should reset to NULL before writing a new value"); |
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1970 _scanned_nmethod = nm; |
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1971 } |
| 0 | 1972 }; |
| 1973 | |
| 1974 inline CompilerThread* CompilerThread::current() { | |
| 1975 return JavaThread::current()->as_CompilerThread(); | |
| 1976 } | |
| 1977 | |
| 1978 | |
| 1979 // The active thread queue. It also keeps track of the current used | |
| 1980 // thread priorities. | |
| 1981 class Threads: AllStatic { | |
| 1982 friend class VMStructs; | |
| 1983 private: | |
| 1984 static JavaThread* _thread_list; | |
| 1985 static int _number_of_threads; | |
| 1986 static int _number_of_non_daemon_threads; | |
| 1987 static int _return_code; | |
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1988 #ifdef ASSERT |
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1989 static bool _vm_complete; |
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1990 #endif |
| 0 | 1991 |
| 1992 public: | |
| 1993 // Thread management | |
| 1994 // force_daemon is a concession to JNI, where we may need to add a | |
| 1995 // thread to the thread list before allocating its thread object | |
| 1996 static void add(JavaThread* p, bool force_daemon = false); | |
| 1997 static void remove(JavaThread* p); | |
| 1998 static bool includes(JavaThread* p); | |
| 1999 static JavaThread* first() { return _thread_list; } | |
| 2000 static void threads_do(ThreadClosure* tc); | |
| 2001 | |
| 2002 // Initializes the vm and creates the vm thread | |
| 2003 static jint create_vm(JavaVMInitArgs* args, bool* canTryAgain); | |
| 2004 static void convert_vm_init_libraries_to_agents(); | |
| 2005 static void create_vm_init_libraries(); | |
| 2006 static void create_vm_init_agents(); | |
| 2007 static void shutdown_vm_agents(); | |
| 2008 static bool destroy_vm(); | |
| 2009 // Supported VM versions via JNI | |
| 2010 // Includes JNI_VERSION_1_1 | |
| 2011 static jboolean is_supported_jni_version_including_1_1(jint version); | |
| 2012 // Does not include JNI_VERSION_1_1 | |
| 2013 static jboolean is_supported_jni_version(jint version); | |
| 2014 | |
| 2015 // Garbage collection | |
| 2016 static void follow_other_roots(void f(oop*)); | |
| 2017 | |
| 2018 // Apply "f->do_oop" to all root oops in all threads. | |
| 2019 // This version may only be called by sequential code. | |
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2020 static void oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf); |
| 0 | 2021 // This version may be called by sequential or parallel code. |
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2022 static void possibly_parallel_oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf); |
| 0 | 2023 // This creates a list of GCTasks, one per thread. |
| 2024 static void create_thread_roots_tasks(GCTaskQueue* q); | |
| 2025 // This creates a list of GCTasks, one per thread, for marking objects. | |
| 2026 static void create_thread_roots_marking_tasks(GCTaskQueue* q); | |
| 2027 | |
| 2028 // Apply "f->do_oop" to roots in all threads that | |
| 2029 // are part of compiled frames | |
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2030 static void compiled_frame_oops_do(OopClosure* f, CodeBlobClosure* cf); |
| 0 | 2031 |
| 2032 static void convert_hcode_pointers(); | |
| 2033 static void restore_hcode_pointers(); | |
| 2034 | |
| 2035 // Sweeper | |
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2036 static void nmethods_do(CodeBlobClosure* cf); |
| 0 | 2037 |
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2038 // RedefineClasses support |
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2039 static void metadata_do(void f(Metadata*)); |
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2040 |
| 0 | 2041 static void gc_epilogue(); |
| 2042 static void gc_prologue(); | |
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2043 #ifdef ASSERT |
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2044 static bool is_vm_complete() { return _vm_complete; } |
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2045 #endif |
| 0 | 2046 |
| 2047 // Verification | |
| 2048 static void verify(); | |
| 2049 static void print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks); | |
| 2050 static void print(bool print_stacks, bool internal_format) { | |
| 2051 // this function is only used by debug.cpp | |
| 2052 print_on(tty, print_stacks, internal_format, false /* no concurrent lock printed */); | |
| 2053 } | |
| 2054 static void print_on_error(outputStream* st, Thread* current, char* buf, int buflen); | |
| 2055 | |
| 2056 // Get Java threads that are waiting to enter a monitor. If doLock | |
| 2057 // is true, then Threads_lock is grabbed as needed. Otherwise, the | |
| 2058 // VM needs to be at a safepoint. | |
| 2059 static GrowableArray<JavaThread*>* get_pending_threads(int count, | |
| 2060 address monitor, bool doLock); | |
| 2061 | |
| 2062 // Get owning Java thread from the monitor's owner field. If doLock | |
| 2063 // is true, then Threads_lock is grabbed as needed. Otherwise, the | |
| 2064 // VM needs to be at a safepoint. | |
| 2065 static JavaThread *owning_thread_from_monitor_owner(address owner, | |
| 2066 bool doLock); | |
| 2067 | |
| 2068 // Number of threads on the active threads list | |
| 2069 static int number_of_threads() { return _number_of_threads; } | |
| 2070 // Number of non-daemon threads on the active threads list | |
| 2071 static int number_of_non_daemon_threads() { return _number_of_non_daemon_threads; } | |
| 2072 | |
| 2073 // Deoptimizes all frames tied to marked nmethods | |
| 2074 static void deoptimized_wrt_marked_nmethods(); | |
| 2075 | |
| 20393 | 2076 static JavaThread* find_java_thread_from_java_tid(jlong java_tid); |
| 2077 | |
| 0 | 2078 }; |
| 2079 | |
| 2080 | |
| 2081 // Thread iterator | |
| 2082 class ThreadClosure: public StackObj { | |
| 2083 public: | |
| 2084 virtual void do_thread(Thread* thread) = 0; | |
| 2085 }; | |
| 2086 | |
| 2087 class SignalHandlerMark: public StackObj { | |
| 2088 private: | |
| 2089 Thread* _thread; | |
| 2090 public: | |
| 2091 SignalHandlerMark(Thread* t) { | |
| 2092 _thread = t; | |
| 2093 if (_thread) _thread->enter_signal_handler(); | |
| 2094 } | |
| 2095 ~SignalHandlerMark() { | |
| 2096 if (_thread) _thread->leave_signal_handler(); | |
| 2097 _thread = NULL; | |
| 2098 } | |
| 2099 }; | |
| 2100 | |
| 1972 | 2101 |
| 2102 #endif // SHARE_VM_RUNTIME_THREAD_HPP |