Mercurial > hg > truffle
annotate src/share/vm/runtime/thread.hpp @ 6862:8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
Summary: Change the type of various task num fields, parameters etc to unsigned and rename them to be more consistent with the other collectors. Code changes were also reviewed by Vitaly Davidovich.
Reviewed-by: johnc
Contributed-by: Kaushik Srenevasan <kaushik@twitter.com>
| author | johnc |
|---|---|
| date | Sat, 06 Oct 2012 01:17:44 -0700 |
| parents | da91efe96a93 |
| children | fb19af007ffc |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_THREAD_HPP |
| 26 #define SHARE_VM_RUNTIME_THREAD_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "memory/threadLocalAllocBuffer.hpp" | |
| 30 #include "oops/oop.hpp" | |
| 31 #include "prims/jni.h" | |
| 32 #include "prims/jvmtiExport.hpp" | |
| 33 #include "runtime/frame.hpp" | |
| 34 #include "runtime/javaFrameAnchor.hpp" | |
| 35 #include "runtime/jniHandles.hpp" | |
| 36 #include "runtime/mutexLocker.hpp" | |
| 37 #include "runtime/os.hpp" | |
| 38 #include "runtime/osThread.hpp" | |
| 39 #include "runtime/park.hpp" | |
| 40 #include "runtime/safepoint.hpp" | |
| 41 #include "runtime/stubRoutines.hpp" | |
| 42 #include "runtime/threadLocalStorage.hpp" | |
| 43 #include "runtime/unhandledOops.hpp" | |
| 6197 | 44 #include "services/memRecorder.hpp" |
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45 #include "trace/tracing.hpp" |
| 1972 | 46 #include "utilities/exceptions.hpp" |
| 47 #include "utilities/top.hpp" | |
| 48 #ifndef SERIALGC | |
| 49 #include "gc_implementation/g1/dirtyCardQueue.hpp" | |
| 50 #include "gc_implementation/g1/satbQueue.hpp" | |
| 51 #endif | |
| 52 #ifdef ZERO | |
| 53 #ifdef TARGET_ARCH_zero | |
| 54 # include "stack_zero.hpp" | |
| 55 #endif | |
| 56 #endif | |
| 57 | |
| 0 | 58 class ThreadSafepointState; |
| 59 class ThreadProfiler; | |
| 60 | |
| 61 class JvmtiThreadState; | |
| 62 class JvmtiGetLoadedClassesClosure; | |
| 63 class ThreadStatistics; | |
| 64 class ConcurrentLocksDump; | |
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65 class ParkEvent; |
| 1878 | 66 class Parker; |
| 0 | 67 |
| 68 class ciEnv; | |
| 69 class CompileThread; | |
| 70 class CompileLog; | |
| 71 class CompileTask; | |
| 72 class CompileQueue; | |
| 73 class CompilerCounters; | |
| 74 class vframeArray; | |
| 75 | |
| 76 class DeoptResourceMark; | |
| 77 class jvmtiDeferredLocalVariableSet; | |
| 78 | |
| 79 class GCTaskQueue; | |
| 80 class ThreadClosure; | |
| 81 class IdealGraphPrinter; | |
| 82 | |
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83 class WorkerThread; |
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84 |
| 0 | 85 // Class hierarchy |
| 86 // - Thread | |
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87 // - NamedThread |
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88 // - VMThread |
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89 // - ConcurrentGCThread |
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90 // - WorkerThread |
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91 // - GangWorker |
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92 // - GCTaskThread |
| 0 | 93 // - JavaThread |
| 94 // - WatcherThread | |
| 95 | |
| 96 class Thread: public ThreadShadow { | |
| 97 friend class VMStructs; | |
| 98 private: | |
| 99 // Exception handling | |
| 100 // (Note: _pending_exception and friends are in ThreadShadow) | |
| 101 //oop _pending_exception; // pending exception for current thread | |
| 102 // const char* _exception_file; // file information for exception (debugging only) | |
| 103 // int _exception_line; // line information for exception (debugging only) | |
| 6197 | 104 protected: |
| 0 | 105 // Support for forcing alignment of thread objects for biased locking |
| 106 void* _real_malloc_address; | |
| 107 public: | |
| 6197 | 108 void* operator new(size_t size) { return allocate(size, true); } |
| 109 void* operator new(size_t size, std::nothrow_t& nothrow_constant) { return allocate(size, false); } | |
| 0 | 110 void operator delete(void* p); |
| 6197 | 111 |
| 112 protected: | |
| 113 static void* allocate(size_t size, bool throw_excpt, MEMFLAGS flags = mtThread); | |
| 0 | 114 private: |
| 115 | |
| 116 // *************************************************************** | |
| 117 // Suspend and resume support | |
| 118 // *************************************************************** | |
| 119 // | |
| 120 // VM suspend/resume no longer exists - it was once used for various | |
| 121 // things including safepoints but was deprecated and finally removed | |
| 122 // in Java 7. Because VM suspension was considered "internal" Java-level | |
| 123 // suspension was considered "external", and this legacy naming scheme | |
| 124 // remains. | |
| 125 // | |
| 126 // External suspend/resume requests come from JVM_SuspendThread, | |
| 127 // JVM_ResumeThread, JVMTI SuspendThread, and finally JVMTI | |
| 128 // ResumeThread. External | |
| 129 // suspend requests cause _external_suspend to be set and external | |
| 130 // resume requests cause _external_suspend to be cleared. | |
| 131 // External suspend requests do not nest on top of other external | |
| 132 // suspend requests. The higher level APIs reject suspend requests | |
| 133 // for already suspended threads. | |
| 134 // | |
| 135 // The external_suspend | |
| 136 // flag is checked by has_special_runtime_exit_condition() and java thread | |
| 137 // will self-suspend when handle_special_runtime_exit_condition() is | |
| 138 // called. Most uses of the _thread_blocked state in JavaThreads are | |
| 139 // considered the same as being externally suspended; if the blocking | |
| 140 // condition lifts, the JavaThread will self-suspend. Other places | |
| 141 // where VM checks for external_suspend include: | |
| 142 // + mutex granting (do not enter monitors when thread is suspended) | |
| 143 // + state transitions from _thread_in_native | |
| 144 // | |
| 145 // In general, java_suspend() does not wait for an external suspend | |
| 146 // request to complete. When it returns, the only guarantee is that | |
| 147 // the _external_suspend field is true. | |
| 148 // | |
| 149 // wait_for_ext_suspend_completion() is used to wait for an external | |
| 150 // suspend request to complete. External suspend requests are usually | |
| 151 // followed by some other interface call that requires the thread to | |
| 152 // be quiescent, e.g., GetCallTrace(). By moving the "wait time" into | |
| 153 // the interface that requires quiescence, we give the JavaThread a | |
| 154 // chance to self-suspend before we need it to be quiescent. This | |
| 155 // improves overall suspend/query performance. | |
| 156 // | |
| 157 // _suspend_flags controls the behavior of java_ suspend/resume. | |
| 158 // It must be set under the protection of SR_lock. Read from the flag is | |
| 159 // OK without SR_lock as long as the value is only used as a hint. | |
| 160 // (e.g., check _external_suspend first without lock and then recheck | |
| 161 // inside SR_lock and finish the suspension) | |
| 162 // | |
| 163 // _suspend_flags is also overloaded for other "special conditions" so | |
| 164 // that a single check indicates whether any special action is needed | |
| 165 // eg. for async exceptions. | |
| 166 // ------------------------------------------------------------------- | |
| 167 // Notes: | |
| 168 // 1. The suspend/resume logic no longer uses ThreadState in OSThread | |
| 169 // but we still update its value to keep other part of the system (mainly | |
| 170 // JVMTI) happy. ThreadState is legacy code (see notes in | |
| 171 // osThread.hpp). | |
| 172 // | |
| 173 // 2. It would be more natural if set_external_suspend() is private and | |
| 174 // part of java_suspend(), but that probably would affect the suspend/query | |
| 175 // performance. Need more investigation on this. | |
| 176 // | |
| 177 | |
| 178 // suspend/resume lock: used for self-suspend | |
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179 Monitor* _SR_lock; |
| 0 | 180 |
| 181 protected: | |
| 182 enum SuspendFlags { | |
| 183 // NOTE: avoid using the sign-bit as cc generates different test code | |
| 184 // when the sign-bit is used, and sometimes incorrectly - see CR 6398077 | |
| 185 | |
| 186 _external_suspend = 0x20000000U, // thread is asked to self suspend | |
| 187 _ext_suspended = 0x40000000U, // thread has self-suspended | |
| 188 _deopt_suspend = 0x10000000U, // thread needs to self suspend for deopt | |
| 189 | |
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190 _has_async_exception = 0x00000001U, // there is a pending async exception |
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191 _critical_native_unlock = 0x00000002U // Must call back to unlock JNI critical lock |
| 0 | 192 }; |
| 193 | |
| 194 // various suspension related flags - atomically updated | |
| 195 // overloaded for async exception checking in check_special_condition_for_native_trans. | |
| 196 volatile uint32_t _suspend_flags; | |
| 197 | |
| 198 private: | |
| 199 int _num_nested_signal; | |
| 200 | |
| 201 public: | |
| 202 void enter_signal_handler() { _num_nested_signal++; } | |
| 203 void leave_signal_handler() { _num_nested_signal--; } | |
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204 bool is_inside_signal_handler() const { return _num_nested_signal > 0; } |
| 0 | 205 |
| 206 private: | |
| 207 // Debug tracing | |
| 208 static void trace(const char* msg, const Thread* const thread) PRODUCT_RETURN; | |
| 209 | |
| 210 // Active_handles points to a block of handles | |
| 211 JNIHandleBlock* _active_handles; | |
| 212 | |
| 213 // One-element thread local free list | |
| 214 JNIHandleBlock* _free_handle_block; | |
| 215 | |
| 216 // Point to the last handle mark | |
| 217 HandleMark* _last_handle_mark; | |
| 218 | |
| 219 // The parity of the last strong_roots iteration in which this thread was | |
| 220 // claimed as a task. | |
| 221 jint _oops_do_parity; | |
| 222 | |
| 223 public: | |
| 224 void set_last_handle_mark(HandleMark* mark) { _last_handle_mark = mark; } | |
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225 HandleMark* last_handle_mark() const { return _last_handle_mark; } |
| 0 | 226 private: |
| 227 | |
| 228 // debug support for checking if code does allow safepoints or not | |
| 229 // GC points in the VM can happen because of allocation, invoking a VM operation, or blocking on | |
| 230 // mutex, or blocking on an object synchronizer (Java locking). | |
| 231 // If !allow_safepoint(), then an assertion failure will happen in any of the above cases | |
| 232 // If !allow_allocation(), then an assertion failure will happen during allocation | |
| 233 // (Hence, !allow_safepoint() => !allow_allocation()). | |
| 234 // | |
| 235 // The two classes No_Safepoint_Verifier and No_Allocation_Verifier are used to set these counters. | |
| 236 // | |
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237 NOT_PRODUCT(int _allow_safepoint_count;) // If 0, thread allow a safepoint to happen |
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238 debug_only (int _allow_allocation_count;) // If 0, the thread is allowed to allocate oops. |
| 0 | 239 |
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240 // Used by SkipGCALot class. |
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241 NOT_PRODUCT(bool _skip_gcalot;) // Should we elide gc-a-lot? |
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242 |
| 0 | 243 // Record when GC is locked out via the GC_locker mechanism |
| 244 CHECK_UNHANDLED_OOPS_ONLY(int _gc_locked_out_count;) | |
| 245 | |
| 246 friend class No_Alloc_Verifier; | |
| 247 friend class No_Safepoint_Verifier; | |
| 248 friend class Pause_No_Safepoint_Verifier; | |
| 249 friend class ThreadLocalStorage; | |
| 250 friend class GC_locker; | |
| 251 | |
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252 ThreadLocalAllocBuffer _tlab; // Thread-local eden |
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253 jlong _allocated_bytes; // Cumulative number of bytes allocated on |
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254 // the Java heap |
| 0 | 255 |
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256 TRACE_BUFFER _trace_buffer; // Thread-local buffer for tracing |
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257 |
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258 int _vm_operation_started_count; // VM_Operation support |
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259 int _vm_operation_completed_count; // VM_Operation support |
| 0 | 260 |
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261 ObjectMonitor* _current_pending_monitor; // ObjectMonitor this thread |
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262 // is waiting to lock |
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263 bool _current_pending_monitor_is_from_java; // locking is from Java code |
| 0 | 264 |
| 265 // ObjectMonitor on which this thread called Object.wait() | |
| 266 ObjectMonitor* _current_waiting_monitor; | |
| 267 | |
| 268 // Private thread-local objectmonitor list - a simple cache organized as a SLL. | |
| 269 public: | |
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270 ObjectMonitor* omFreeList; |
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271 int omFreeCount; // length of omFreeList |
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272 int omFreeProvision; // reload chunk size |
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273 ObjectMonitor* omInUseList; // SLL to track monitors in circulation |
| 1587 | 274 int omInUseCount; // length of omInUseList |
| 0 | 275 |
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276 #ifdef ASSERT |
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277 private: |
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278 bool _visited_for_critical_count; |
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279 |
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280 public: |
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281 void set_visited_for_critical_count(bool z) { _visited_for_critical_count = z; } |
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282 bool was_visited_for_critical_count() const { return _visited_for_critical_count; } |
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283 #endif |
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284 |
| 0 | 285 public: |
| 286 enum { | |
| 287 is_definitely_current_thread = true | |
| 288 }; | |
| 289 | |
| 290 // Constructor | |
| 291 Thread(); | |
| 292 virtual ~Thread(); | |
| 293 | |
| 294 // initializtion | |
| 295 void initialize_thread_local_storage(); | |
| 296 | |
| 297 // thread entry point | |
| 298 virtual void run(); | |
| 299 | |
| 300 // Testers | |
| 301 virtual bool is_VM_thread() const { return false; } | |
| 302 virtual bool is_Java_thread() const { return false; } | |
| 303 virtual bool is_Compiler_thread() const { return false; } | |
| 304 virtual bool is_hidden_from_external_view() const { return false; } | |
| 305 virtual bool is_jvmti_agent_thread() const { return false; } | |
| 306 // True iff the thread can perform GC operations at a safepoint. | |
| 307 // Generally will be true only of VM thread and parallel GC WorkGang | |
| 308 // threads. | |
| 309 virtual bool is_GC_task_thread() const { return false; } | |
| 310 virtual bool is_Watcher_thread() const { return false; } | |
| 311 virtual bool is_ConcurrentGC_thread() const { return false; } | |
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312 virtual bool is_Named_thread() const { return false; } |
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313 virtual bool is_Worker_thread() const { return false; } |
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314 |
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315 // Casts |
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316 virtual WorkerThread* as_Worker_thread() const { return NULL; } |
| 0 | 317 |
| 318 virtual char* name() const { return (char*)"Unknown thread"; } | |
| 319 | |
| 320 // Returns the current thread | |
| 321 static inline Thread* current(); | |
| 322 | |
| 323 // Common thread operations | |
| 324 static void set_priority(Thread* thread, ThreadPriority priority); | |
| 325 static ThreadPriority get_priority(const Thread* const thread); | |
| 326 static void start(Thread* thread); | |
| 327 static void interrupt(Thread* thr); | |
| 328 static bool is_interrupted(Thread* thr, bool clear_interrupted); | |
| 329 | |
| 4006 | 330 void set_native_thread_name(const char *name) { |
| 331 assert(Thread::current() == this, "set_native_thread_name can only be called on the current thread"); | |
| 332 os::set_native_thread_name(name); | |
| 333 } | |
| 334 | |
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335 ObjectMonitor** omInUseList_addr() { return (ObjectMonitor **)&omInUseList; } |
| 0 | 336 Monitor* SR_lock() const { return _SR_lock; } |
| 337 | |
| 338 bool has_async_exception() const { return (_suspend_flags & _has_async_exception) != 0; } | |
| 339 | |
| 340 void set_suspend_flag(SuspendFlags f) { | |
| 341 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); | |
| 342 uint32_t flags; | |
| 343 do { | |
| 344 flags = _suspend_flags; | |
| 345 } | |
| 346 while (Atomic::cmpxchg((jint)(flags | f), | |
| 347 (volatile jint*)&_suspend_flags, | |
| 348 (jint)flags) != (jint)flags); | |
| 349 } | |
| 350 void clear_suspend_flag(SuspendFlags f) { | |
| 351 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); | |
| 352 uint32_t flags; | |
| 353 do { | |
| 354 flags = _suspend_flags; | |
| 355 } | |
| 356 while (Atomic::cmpxchg((jint)(flags & ~f), | |
| 357 (volatile jint*)&_suspend_flags, | |
| 358 (jint)flags) != (jint)flags); | |
| 359 } | |
| 360 | |
| 361 void set_has_async_exception() { | |
| 362 set_suspend_flag(_has_async_exception); | |
| 363 } | |
| 364 void clear_has_async_exception() { | |
| 365 clear_suspend_flag(_has_async_exception); | |
| 366 } | |
| 367 | |
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368 bool do_critical_native_unlock() const { return (_suspend_flags & _critical_native_unlock) != 0; } |
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369 |
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370 void set_critical_native_unlock() { |
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371 set_suspend_flag(_critical_native_unlock); |
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372 } |
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373 void clear_critical_native_unlock() { |
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374 clear_suspend_flag(_critical_native_unlock); |
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375 } |
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376 |
| 0 | 377 // Support for Unhandled Oop detection |
| 378 #ifdef CHECK_UNHANDLED_OOPS | |
| 379 private: | |
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380 UnhandledOops* _unhandled_oops; |
| 0 | 381 public: |
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382 UnhandledOops* unhandled_oops() { return _unhandled_oops; } |
| 0 | 383 // Mark oop safe for gc. It may be stack allocated but won't move. |
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384 void allow_unhandled_oop(oop *op) { |
| 0 | 385 if (CheckUnhandledOops) unhandled_oops()->allow_unhandled_oop(op); |
| 386 } | |
| 387 // Clear oops at safepoint so crashes point to unhandled oop violator | |
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388 void clear_unhandled_oops() { |
| 0 | 389 if (CheckUnhandledOops) unhandled_oops()->clear_unhandled_oops(); |
| 390 } | |
| 391 bool is_gc_locked_out() { return _gc_locked_out_count > 0; } | |
| 392 #endif // CHECK_UNHANDLED_OOPS | |
| 393 | |
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394 #ifndef PRODUCT |
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395 bool skip_gcalot() { return _skip_gcalot; } |
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396 void set_skip_gcalot(bool v) { _skip_gcalot = v; } |
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397 #endif |
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398 |
| 0 | 399 public: |
| 400 // Installs a pending exception to be inserted later | |
| 401 static void send_async_exception(oop thread_oop, oop java_throwable); | |
| 402 | |
| 403 // Resource area | |
| 404 ResourceArea* resource_area() const { return _resource_area; } | |
| 405 void set_resource_area(ResourceArea* area) { _resource_area = area; } | |
| 406 | |
| 407 OSThread* osthread() const { return _osthread; } | |
| 408 void set_osthread(OSThread* thread) { _osthread = thread; } | |
| 409 | |
| 410 // JNI handle support | |
| 411 JNIHandleBlock* active_handles() const { return _active_handles; } | |
| 412 void set_active_handles(JNIHandleBlock* block) { _active_handles = block; } | |
| 413 JNIHandleBlock* free_handle_block() const { return _free_handle_block; } | |
| 414 void set_free_handle_block(JNIHandleBlock* block) { _free_handle_block = block; } | |
| 415 | |
| 416 // Internal handle support | |
| 417 HandleArea* handle_area() const { return _handle_area; } | |
| 418 void set_handle_area(HandleArea* area) { _handle_area = area; } | |
| 419 | |
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420 GrowableArray<Metadata*>* metadata_handles() const { return _metadata_handles; } |
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421 void set_metadata_handles(GrowableArray<Metadata*>* handles){ _metadata_handles = handles; } |
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422 |
| 0 | 423 // Thread-Local Allocation Buffer (TLAB) support |
| 424 ThreadLocalAllocBuffer& tlab() { return _tlab; } | |
| 425 void initialize_tlab() { | |
| 426 if (UseTLAB) { | |
| 427 tlab().initialize(); | |
| 428 } | |
| 429 } | |
| 430 | |
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431 jlong allocated_bytes() { return _allocated_bytes; } |
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432 void set_allocated_bytes(jlong value) { _allocated_bytes = value; } |
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433 void incr_allocated_bytes(jlong size) { _allocated_bytes += size; } |
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434 jlong cooked_allocated_bytes() { |
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435 jlong allocated_bytes = OrderAccess::load_acquire(&_allocated_bytes); |
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436 if (UseTLAB) { |
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437 size_t used_bytes = tlab().used_bytes(); |
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438 if ((ssize_t)used_bytes > 0) { |
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439 // More-or-less valid tlab. The load_acquire above should ensure |
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440 // that the result of the add is <= the instantaneous value |
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441 return allocated_bytes + used_bytes; |
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442 } |
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443 } |
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444 return allocated_bytes; |
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445 } |
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446 |
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447 TRACE_BUFFER trace_buffer() { return _trace_buffer; } |
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448 void set_trace_buffer(TRACE_BUFFER buf) { _trace_buffer = buf; } |
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449 |
| 0 | 450 // VM operation support |
| 451 int vm_operation_ticket() { return ++_vm_operation_started_count; } | |
| 452 int vm_operation_completed_count() { return _vm_operation_completed_count; } | |
| 453 void increment_vm_operation_completed_count() { _vm_operation_completed_count++; } | |
| 454 | |
| 455 // For tracking the heavyweight monitor the thread is pending on. | |
| 456 ObjectMonitor* current_pending_monitor() { | |
| 457 return _current_pending_monitor; | |
| 458 } | |
| 459 void set_current_pending_monitor(ObjectMonitor* monitor) { | |
| 460 _current_pending_monitor = monitor; | |
| 461 } | |
| 462 void set_current_pending_monitor_is_from_java(bool from_java) { | |
| 463 _current_pending_monitor_is_from_java = from_java; | |
| 464 } | |
| 465 bool current_pending_monitor_is_from_java() { | |
| 466 return _current_pending_monitor_is_from_java; | |
| 467 } | |
| 468 | |
| 469 // For tracking the ObjectMonitor on which this thread called Object.wait() | |
| 470 ObjectMonitor* current_waiting_monitor() { | |
| 471 return _current_waiting_monitor; | |
| 472 } | |
| 473 void set_current_waiting_monitor(ObjectMonitor* monitor) { | |
| 474 _current_waiting_monitor = monitor; | |
| 475 } | |
| 476 | |
| 477 // GC support | |
| 478 // Apply "f->do_oop" to all root oops in "this". | |
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479 // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames |
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480 virtual void oops_do(OopClosure* f, CodeBlobClosure* cf); |
| 0 | 481 |
| 482 // Handles the parallel case for the method below. | |
| 483 private: | |
| 484 bool claim_oops_do_par_case(int collection_parity); | |
| 485 public: | |
| 486 // Requires that "collection_parity" is that of the current strong roots | |
| 487 // iteration. If "is_par" is false, sets the parity of "this" to | |
| 488 // "collection_parity", and returns "true". If "is_par" is true, | |
| 489 // uses an atomic instruction to set the current threads parity to | |
| 490 // "collection_parity", if it is not already. Returns "true" iff the | |
| 491 // calling thread does the update, this indicates that the calling thread | |
| 492 // has claimed the thread's stack as a root groop in the current | |
| 493 // collection. | |
| 494 bool claim_oops_do(bool is_par, int collection_parity) { | |
| 495 if (!is_par) { | |
| 496 _oops_do_parity = collection_parity; | |
| 497 return true; | |
| 498 } else { | |
| 499 return claim_oops_do_par_case(collection_parity); | |
| 500 } | |
| 501 } | |
| 502 | |
| 503 // Sweeper support | |
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504 void nmethods_do(CodeBlobClosure* cf); |
| 0 | 505 |
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506 // jvmtiRedefineClasses support |
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507 void metadata_do(void f(Metadata*)); |
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508 |
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509 // Used by fast lock support |
| 0 | 510 virtual bool is_lock_owned(address adr) const; |
| 511 | |
| 512 // Check if address is in the stack of the thread (not just for locks). | |
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513 // Warning: the method can only be used on the running thread |
| 0 | 514 bool is_in_stack(address adr) const; |
| 515 | |
| 516 // Sets this thread as starting thread. Returns failure if thread | |
| 517 // creation fails due to lack of memory, too many threads etc. | |
| 518 bool set_as_starting_thread(); | |
| 519 | |
| 520 protected: | |
| 521 // OS data associated with the thread | |
| 522 OSThread* _osthread; // Platform-specific thread information | |
| 523 | |
| 524 // Thread local resource area for temporary allocation within the VM | |
| 525 ResourceArea* _resource_area; | |
| 526 | |
| 527 // Thread local handle area for allocation of handles within the VM | |
| 528 HandleArea* _handle_area; | |
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529 GrowableArray<Metadata*>* _metadata_handles; |
| 0 | 530 |
| 531 // Support for stack overflow handling, get_thread, etc. | |
| 532 address _stack_base; | |
| 533 size_t _stack_size; | |
| 534 uintptr_t _self_raw_id; // used by get_thread (mutable) | |
| 535 int _lgrp_id; | |
| 536 | |
| 537 public: | |
| 538 // Stack overflow support | |
| 539 address stack_base() const { assert(_stack_base != NULL,"Sanity check"); return _stack_base; } | |
| 540 | |
| 541 void set_stack_base(address base) { _stack_base = base; } | |
| 542 size_t stack_size() const { return _stack_size; } | |
| 543 void set_stack_size(size_t size) { _stack_size = size; } | |
| 544 void record_stack_base_and_size(); | |
| 545 | |
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546 bool on_local_stack(address adr) const { |
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547 /* QQQ this has knowledge of direction, ought to be a stack method */ |
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548 return (_stack_base >= adr && adr >= (_stack_base - _stack_size)); |
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549 } |
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550 |
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551 uintptr_t self_raw_id() { return _self_raw_id; } |
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552 void set_self_raw_id(uintptr_t value) { _self_raw_id = value; } |
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553 |
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554 int lgrp_id() const { return _lgrp_id; } |
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555 void set_lgrp_id(int value) { _lgrp_id = value; } |
| 0 | 556 |
| 557 // Printing | |
| 558 void print_on(outputStream* st) const; | |
| 559 void print() const { print_on(tty); } | |
| 560 virtual void print_on_error(outputStream* st, char* buf, int buflen) const; | |
| 561 | |
| 562 // Debug-only code | |
| 563 #ifdef ASSERT | |
| 564 private: | |
| 565 // Deadlock detection support for Mutex locks. List of locks own by thread. | |
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566 Monitor* _owned_locks; |
| 0 | 567 // Mutex::set_owner_implementation is the only place where _owned_locks is modified, |
| 568 // thus the friendship | |
| 569 friend class Mutex; | |
| 570 friend class Monitor; | |
| 571 | |
| 572 public: | |
| 573 void print_owned_locks_on(outputStream* st) const; | |
| 574 void print_owned_locks() const { print_owned_locks_on(tty); } | |
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575 Monitor* owned_locks() const { return _owned_locks; } |
| 0 | 576 bool owns_locks() const { return owned_locks() != NULL; } |
| 577 bool owns_locks_but_compiled_lock() const; | |
| 578 | |
| 579 // Deadlock detection | |
| 580 bool allow_allocation() { return _allow_allocation_count == 0; } | |
| 581 #endif | |
| 582 | |
| 583 void check_for_valid_safepoint_state(bool potential_vm_operation) PRODUCT_RETURN; | |
| 584 | |
| 585 private: | |
| 586 volatile int _jvmti_env_iteration_count; | |
| 587 | |
| 588 public: | |
| 589 void entering_jvmti_env_iteration() { ++_jvmti_env_iteration_count; } | |
| 590 void leaving_jvmti_env_iteration() { --_jvmti_env_iteration_count; } | |
| 591 bool is_inside_jvmti_env_iteration() { return _jvmti_env_iteration_count > 0; } | |
| 592 | |
| 593 // Code generation | |
| 594 static ByteSize exception_file_offset() { return byte_offset_of(Thread, _exception_file ); } | |
| 595 static ByteSize exception_line_offset() { return byte_offset_of(Thread, _exception_line ); } | |
| 596 static ByteSize active_handles_offset() { return byte_offset_of(Thread, _active_handles ); } | |
| 597 | |
| 598 static ByteSize stack_base_offset() { return byte_offset_of(Thread, _stack_base ); } | |
| 599 static ByteSize stack_size_offset() { return byte_offset_of(Thread, _stack_size ); } | |
| 600 | |
| 601 #define TLAB_FIELD_OFFSET(name) \ | |
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602 static ByteSize tlab_##name##_offset() { return byte_offset_of(Thread, _tlab) + ThreadLocalAllocBuffer::name##_offset(); } |
| 0 | 603 |
| 604 TLAB_FIELD_OFFSET(start) | |
| 605 TLAB_FIELD_OFFSET(end) | |
| 606 TLAB_FIELD_OFFSET(top) | |
| 607 TLAB_FIELD_OFFSET(pf_top) | |
| 608 TLAB_FIELD_OFFSET(size) // desired_size | |
| 609 TLAB_FIELD_OFFSET(refill_waste_limit) | |
| 610 TLAB_FIELD_OFFSET(number_of_refills) | |
| 611 TLAB_FIELD_OFFSET(fast_refill_waste) | |
| 612 TLAB_FIELD_OFFSET(slow_allocations) | |
| 613 | |
| 614 #undef TLAB_FIELD_OFFSET | |
| 615 | |
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616 static ByteSize allocated_bytes_offset() { return byte_offset_of(Thread, _allocated_bytes ); } |
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617 |
| 0 | 618 public: |
| 619 volatile intptr_t _Stalled ; | |
| 620 volatile int _TypeTag ; | |
| 621 ParkEvent * _ParkEvent ; // for synchronized() | |
| 622 ParkEvent * _SleepEvent ; // for Thread.sleep | |
| 623 ParkEvent * _MutexEvent ; // for native internal Mutex/Monitor | |
| 624 ParkEvent * _MuxEvent ; // for low-level muxAcquire-muxRelease | |
| 625 int NativeSyncRecursion ; // diagnostic | |
| 626 | |
| 627 volatile int _OnTrap ; // Resume-at IP delta | |
| 628 jint _hashStateW ; // Marsaglia Shift-XOR thread-local RNG | |
| 629 jint _hashStateX ; // thread-specific hashCode generator state | |
| 630 jint _hashStateY ; | |
| 631 jint _hashStateZ ; | |
| 632 void * _schedctl ; | |
| 633 | |
| 634 intptr_t _ScratchA, _ScratchB ; // Scratch locations for fast-path sync code | |
| 635 static ByteSize ScratchA_offset() { return byte_offset_of(Thread, _ScratchA ); } | |
| 636 static ByteSize ScratchB_offset() { return byte_offset_of(Thread, _ScratchB ); } | |
| 637 | |
| 638 volatile jint rng [4] ; // RNG for spin loop | |
| 639 | |
| 640 // Low-level leaf-lock primitives used to implement synchronization | |
| 641 // and native monitor-mutex infrastructure. | |
| 642 // Not for general synchronization use. | |
| 643 static void SpinAcquire (volatile int * Lock, const char * Name) ; | |
| 644 static void SpinRelease (volatile int * Lock) ; | |
| 645 static void muxAcquire (volatile intptr_t * Lock, const char * Name) ; | |
| 646 static void muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) ; | |
| 647 static void muxRelease (volatile intptr_t * Lock) ; | |
| 648 }; | |
| 649 | |
| 650 // Inline implementation of Thread::current() | |
| 651 // Thread::current is "hot" it's called > 128K times in the 1st 500 msecs of | |
| 652 // startup. | |
| 653 // ThreadLocalStorage::thread is warm -- it's called > 16K times in the same | |
| 654 // period. This is inlined in thread_<os_family>.inline.hpp. | |
| 655 | |
| 656 inline Thread* Thread::current() { | |
| 657 #ifdef ASSERT | |
| 658 // This function is very high traffic. Define PARANOID to enable expensive | |
| 659 // asserts. | |
| 660 #ifdef PARANOID | |
| 661 // Signal handler should call ThreadLocalStorage::get_thread_slow() | |
| 662 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 663 assert(t != NULL && !t->is_inside_signal_handler(), | |
| 664 "Don't use Thread::current() inside signal handler"); | |
| 665 #endif | |
| 666 #endif | |
| 667 Thread* thread = ThreadLocalStorage::thread(); | |
| 668 assert(thread != NULL, "just checking"); | |
| 669 return thread; | |
| 670 } | |
| 671 | |
| 672 // Name support for threads. non-JavaThread subclasses with multiple | |
| 673 // uniquely named instances should derive from this. | |
| 674 class NamedThread: public Thread { | |
| 675 friend class VMStructs; | |
| 676 enum { | |
| 677 max_name_len = 64 | |
| 678 }; | |
| 679 private: | |
| 680 char* _name; | |
|
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681 // log JavaThread being processed by oops_do |
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682 JavaThread* _processed_thread; |
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683 |
| 0 | 684 public: |
| 685 NamedThread(); | |
| 686 ~NamedThread(); | |
| 687 // May only be called once per thread. | |
| 688 void set_name(const char* format, ...); | |
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689 virtual bool is_Named_thread() const { return true; } |
| 0 | 690 virtual char* name() const { return _name == NULL ? (char*)"Unknown Thread" : _name; } |
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691 JavaThread *processed_thread() { return _processed_thread; } |
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692 void set_processed_thread(JavaThread *thread) { _processed_thread = thread; } |
| 0 | 693 }; |
| 694 | |
| 695 // Worker threads are named and have an id of an assigned work. | |
| 696 class WorkerThread: public NamedThread { | |
| 697 private: | |
| 698 uint _id; | |
| 699 public: | |
|
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700 WorkerThread() : _id(0) { } |
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701 virtual bool is_Worker_thread() const { return true; } |
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702 |
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703 virtual WorkerThread* as_Worker_thread() const { |
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704 assert(is_Worker_thread(), "Dubious cast to WorkerThread*?"); |
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705 return (WorkerThread*) this; |
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706 } |
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707 |
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708 void set_id(uint work_id) { _id = work_id; } |
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709 uint id() const { return _id; } |
| 0 | 710 }; |
| 711 | |
| 712 // A single WatcherThread is used for simulating timer interrupts. | |
| 713 class WatcherThread: public Thread { | |
| 714 friend class VMStructs; | |
| 715 public: | |
| 716 virtual void run(); | |
| 717 | |
| 718 private: | |
| 719 static WatcherThread* _watcher_thread; | |
| 720 | |
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721 volatile static bool _should_terminate; // updated without holding lock |
| 0 | 722 public: |
| 723 enum SomeConstants { | |
| 724 delay_interval = 10 // interrupt delay in milliseconds | |
| 725 }; | |
| 726 | |
| 727 // Constructor | |
| 728 WatcherThread(); | |
| 729 | |
| 730 // Tester | |
| 731 bool is_Watcher_thread() const { return true; } | |
| 732 | |
| 733 // Printing | |
| 734 char* name() const { return (char*)"VM Periodic Task Thread"; } | |
| 735 void print_on(outputStream* st) const; | |
| 736 void print() const { print_on(tty); } | |
| 737 | |
| 738 // Returns the single instance of WatcherThread | |
| 739 static WatcherThread* watcher_thread() { return _watcher_thread; } | |
| 740 | |
| 741 // Create and start the single instance of WatcherThread, or stop it on shutdown | |
| 742 static void start(); | |
| 743 static void stop(); | |
| 744 }; | |
| 745 | |
| 746 | |
| 747 class CompilerThread; | |
| 748 | |
| 749 typedef void (*ThreadFunction)(JavaThread*, TRAPS); | |
| 750 | |
| 751 class JavaThread: public Thread { | |
| 752 friend class VMStructs; | |
| 753 private: | |
| 754 JavaThread* _next; // The next thread in the Threads list | |
| 755 oop _threadObj; // The Java level thread object | |
| 756 | |
| 757 #ifdef ASSERT | |
| 758 private: | |
| 759 int _java_call_counter; | |
| 760 | |
| 761 public: | |
| 762 int java_call_counter() { return _java_call_counter; } | |
| 763 void inc_java_call_counter() { _java_call_counter++; } | |
| 764 void dec_java_call_counter() { | |
| 765 assert(_java_call_counter > 0, "Invalid nesting of JavaCallWrapper"); | |
| 766 _java_call_counter--; | |
| 767 } | |
| 768 private: // restore original namespace restriction | |
| 769 #endif // ifdef ASSERT | |
| 770 | |
| 771 #ifndef PRODUCT | |
| 772 public: | |
| 773 enum { | |
| 774 jump_ring_buffer_size = 16 | |
| 775 }; | |
| 776 private: // restore original namespace restriction | |
| 777 #endif | |
| 778 | |
| 779 JavaFrameAnchor _anchor; // Encapsulation of current java frame and it state | |
| 780 | |
| 781 ThreadFunction _entry_point; | |
| 782 | |
| 783 JNIEnv _jni_environment; | |
| 784 | |
| 785 // Deopt support | |
| 786 DeoptResourceMark* _deopt_mark; // Holds special ResourceMark for deoptimization | |
| 787 | |
| 788 intptr_t* _must_deopt_id; // id of frame that needs to be deopted once we | |
| 789 // transition out of native | |
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790 nmethod* _deopt_nmethod; // nmethod that is currently being deoptimized |
| 0 | 791 vframeArray* _vframe_array_head; // Holds the heap of the active vframeArrays |
| 792 vframeArray* _vframe_array_last; // Holds last vFrameArray we popped | |
| 793 // Because deoptimization is lazy we must save jvmti requests to set locals | |
| 794 // in compiled frames until we deoptimize and we have an interpreter frame. | |
| 795 // This holds the pointer to array (yeah like there might be more than one) of | |
| 796 // description of compiled vframes that have locals that need to be updated. | |
| 797 GrowableArray<jvmtiDeferredLocalVariableSet*>* _deferred_locals_updates; | |
| 798 | |
| 799 // Handshake value for fixing 6243940. We need a place for the i2c | |
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800 // adapter to store the callee Method*. This value is NEVER live |
| 0 | 801 // across a gc point so it does NOT have to be gc'd |
| 802 // The handshake is open ended since we can't be certain that it will | |
| 803 // be NULLed. This is because we rarely ever see the race and end up | |
| 804 // in handle_wrong_method which is the backend of the handshake. See | |
| 805 // code in i2c adapters and handle_wrong_method. | |
| 806 | |
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807 Method* _callee_target; |
| 0 | 808 |
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809 // Used to pass back results to the interpreter or generated code running Java code. |
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810 oop _vm_result; // oop result is GC-preserved |
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811 Metadata* _vm_result_2; // non-oop result |
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812 |
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813 // See ReduceInitialCardMarks: this holds the precise space interval of |
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814 // the most recent slow path allocation for which compiled code has |
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815 // elided card-marks for performance along the fast-path. |
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816 MemRegion _deferred_card_mark; |
| 0 | 817 |
| 818 MonitorChunk* _monitor_chunks; // Contains the off stack monitors | |
| 819 // allocated during deoptimization | |
| 820 // and by JNI_MonitorEnter/Exit | |
| 821 | |
| 822 // Async. requests support | |
| 823 enum AsyncRequests { | |
| 824 _no_async_condition = 0, | |
| 825 _async_exception, | |
| 826 _async_unsafe_access_error | |
| 827 }; | |
| 828 AsyncRequests _special_runtime_exit_condition; // Enum indicating pending async. request | |
| 829 oop _pending_async_exception; | |
| 830 | |
| 831 // Safepoint support | |
| 832 public: // Expose _thread_state for SafeFetchInt() | |
| 833 volatile JavaThreadState _thread_state; | |
| 834 private: | |
| 835 ThreadSafepointState *_safepoint_state; // Holds information about a thread during a safepoint | |
| 836 address _saved_exception_pc; // Saved pc of instruction where last implicit exception happened | |
| 837 | |
| 838 // JavaThread termination support | |
| 839 enum TerminatedTypes { | |
| 840 _not_terminated = 0xDEAD - 2, | |
| 841 _thread_exiting, // JavaThread::exit() has been called for this thread | |
| 842 _thread_terminated, // JavaThread is removed from thread list | |
| 843 _vm_exited // JavaThread is still executing native code, but VM is terminated | |
| 844 // only VM_Exit can set _vm_exited | |
| 845 }; | |
| 846 | |
| 847 // In general a JavaThread's _terminated field transitions as follows: | |
| 848 // | |
| 849 // _not_terminated => _thread_exiting => _thread_terminated | |
| 850 // | |
| 851 // _vm_exited is a special value to cover the case of a JavaThread | |
| 852 // executing native code after the VM itself is terminated. | |
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853 volatile TerminatedTypes _terminated; |
| 0 | 854 // suspend/resume support |
| 855 volatile bool _suspend_equivalent; // Suspend equivalent condition | |
| 856 jint _in_deopt_handler; // count of deoptimization | |
| 857 // handlers thread is in | |
| 858 volatile bool _doing_unsafe_access; // Thread may fault due to unsafe access | |
| 859 bool _do_not_unlock_if_synchronized; // Do not unlock the receiver of a synchronized method (since it was | |
| 860 // never locked) when throwing an exception. Used by interpreter only. | |
| 861 | |
| 4006 | 862 // JNI attach states: |
| 863 enum JNIAttachStates { | |
| 864 _not_attaching_via_jni = 1, // thread is not attaching via JNI | |
| 865 _attaching_via_jni, // thread is attaching via JNI | |
| 866 _attached_via_jni // thread has attached via JNI | |
| 867 }; | |
| 868 | |
| 869 // A regular JavaThread's _jni_attach_state is _not_attaching_via_jni. | |
| 870 // A native thread that is attaching via JNI starts with a value | |
| 871 // of _attaching_via_jni and transitions to _attached_via_jni. | |
| 872 volatile JNIAttachStates _jni_attach_state; | |
| 0 | 873 |
| 874 public: | |
| 875 // State of the stack guard pages for this thread. | |
| 876 enum StackGuardState { | |
| 877 stack_guard_unused, // not needed | |
| 878 stack_guard_yellow_disabled,// disabled (temporarily) after stack overflow | |
| 879 stack_guard_enabled // enabled | |
| 880 }; | |
| 881 | |
| 882 private: | |
| 883 | |
| 884 StackGuardState _stack_guard_state; | |
| 885 | |
| 886 // Compiler exception handling (NOTE: The _exception_oop is *NOT* the same as _pending_exception. It is | |
| 887 // used to temp. parsing values into and out of the runtime system during exception handling for compiled | |
| 888 // code) | |
| 889 volatile oop _exception_oop; // Exception thrown in compiled code | |
| 890 volatile address _exception_pc; // PC where exception happened | |
| 891 volatile address _exception_handler_pc; // PC for handler of exception | |
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892 volatile int _is_method_handle_return; // true (== 1) if the current exception PC is a MethodHandle call site. |
| 0 | 893 |
| 894 // support for compilation | |
| 895 bool _is_compiling; // is true if a compilation is active inthis thread (one compilation per thread possible) | |
| 896 | |
| 897 // support for JNI critical regions | |
| 898 jint _jni_active_critical; // count of entries into JNI critical region | |
| 899 | |
| 900 // For deadlock detection. | |
| 901 int _depth_first_number; | |
| 902 | |
| 903 // JVMTI PopFrame support | |
| 904 // This is set to popframe_pending to signal that top Java frame should be popped immediately | |
| 905 int _popframe_condition; | |
| 906 | |
| 907 #ifndef PRODUCT | |
| 908 int _jmp_ring_index; | |
| 909 struct { | |
| 910 // We use intptr_t instead of address so debugger doesn't try and display strings | |
| 911 intptr_t _target; | |
| 912 intptr_t _instruction; | |
| 913 const char* _file; | |
| 914 int _line; | |
| 915 } _jmp_ring[ jump_ring_buffer_size ]; | |
| 916 #endif /* PRODUCT */ | |
| 917 | |
| 342 | 918 #ifndef SERIALGC |
| 919 // Support for G1 barriers | |
| 920 | |
| 921 ObjPtrQueue _satb_mark_queue; // Thread-local log for SATB barrier. | |
| 922 // Set of all such queues. | |
| 923 static SATBMarkQueueSet _satb_mark_queue_set; | |
| 924 | |
| 925 DirtyCardQueue _dirty_card_queue; // Thread-local log for dirty cards. | |
| 926 // Set of all such queues. | |
| 927 static DirtyCardQueueSet _dirty_card_queue_set; | |
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928 |
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929 void flush_barrier_queues(); |
| 342 | 930 #endif // !SERIALGC |
| 931 | |
| 0 | 932 friend class VMThread; |
| 933 friend class ThreadWaitTransition; | |
| 934 friend class VM_Exit; | |
| 935 | |
| 936 void initialize(); // Initialized the instance variables | |
| 937 | |
| 938 public: | |
| 939 // Constructor | |
| 4006 | 940 JavaThread(bool is_attaching_via_jni = false); // for main thread and JNI attached threads |
| 0 | 941 JavaThread(ThreadFunction entry_point, size_t stack_size = 0); |
| 942 ~JavaThread(); | |
| 943 | |
| 944 #ifdef ASSERT | |
| 945 // verify this JavaThread hasn't be published in the Threads::list yet | |
| 946 void verify_not_published(); | |
| 947 #endif | |
| 948 | |
| 949 //JNI functiontable getter/setter for JVMTI jni function table interception API. | |
| 950 void set_jni_functions(struct JNINativeInterface_* functionTable) { | |
| 951 _jni_environment.functions = functionTable; | |
| 952 } | |
| 953 struct JNINativeInterface_* get_jni_functions() { | |
| 954 return (struct JNINativeInterface_ *)_jni_environment.functions; | |
| 955 } | |
| 956 | |
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957 // This function is called at thread creation to allow |
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958 // platform specific thread variables to be initialized. |
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959 void cache_global_variables(); |
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960 |
| 0 | 961 // Executes Shutdown.shutdown() |
| 962 void invoke_shutdown_hooks(); | |
| 963 | |
| 964 // Cleanup on thread exit | |
| 965 enum ExitType { | |
| 966 normal_exit, | |
| 967 jni_detach | |
| 968 }; | |
| 969 void exit(bool destroy_vm, ExitType exit_type = normal_exit); | |
| 970 | |
| 971 void cleanup_failed_attach_current_thread(); | |
| 972 | |
| 973 // Testers | |
| 974 virtual bool is_Java_thread() const { return true; } | |
| 975 | |
| 976 // compilation | |
| 977 void set_is_compiling(bool f) { _is_compiling = f; } | |
| 978 bool is_compiling() const { return _is_compiling; } | |
| 979 | |
| 980 // Thread chain operations | |
| 981 JavaThread* next() const { return _next; } | |
| 982 void set_next(JavaThread* p) { _next = p; } | |
| 983 | |
| 984 // Thread oop. threadObj() can be NULL for initial JavaThread | |
| 985 // (or for threads attached via JNI) | |
| 986 oop threadObj() const { return _threadObj; } | |
| 987 void set_threadObj(oop p) { _threadObj = p; } | |
| 988 | |
| 989 ThreadPriority java_priority() const; // Read from threadObj() | |
| 990 | |
| 991 // Prepare thread and add to priority queue. If a priority is | |
| 992 // not specified, use the priority of the thread object. Threads_lock | |
| 993 // must be held while this function is called. | |
| 994 void prepare(jobject jni_thread, ThreadPriority prio=NoPriority); | |
| 995 | |
| 996 void set_saved_exception_pc(address pc) { _saved_exception_pc = pc; } | |
| 997 address saved_exception_pc() { return _saved_exception_pc; } | |
| 998 | |
| 999 | |
| 1000 ThreadFunction entry_point() const { return _entry_point; } | |
| 1001 | |
| 1002 // Allocates a new Java level thread object for this thread. thread_name may be NULL. | |
| 1003 void allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS); | |
| 1004 | |
| 1005 // Last frame anchor routines | |
| 1006 | |
| 1007 JavaFrameAnchor* frame_anchor(void) { return &_anchor; } | |
| 1008 | |
| 1009 // last_Java_sp | |
| 1010 bool has_last_Java_frame() const { return _anchor.has_last_Java_frame(); } | |
| 1011 intptr_t* last_Java_sp() const { return _anchor.last_Java_sp(); } | |
| 1012 | |
| 1013 // last_Java_pc | |
| 1014 | |
| 1015 address last_Java_pc(void) { return _anchor.last_Java_pc(); } | |
| 1016 | |
| 1017 // Safepoint support | |
| 1018 JavaThreadState thread_state() const { return _thread_state; } | |
| 1019 void set_thread_state(JavaThreadState s) { _thread_state=s; } | |
| 1020 ThreadSafepointState *safepoint_state() const { return _safepoint_state; } | |
| 1021 void set_safepoint_state(ThreadSafepointState *state) { _safepoint_state = state; } | |
| 1022 bool is_at_poll_safepoint() { return _safepoint_state->is_at_poll_safepoint(); } | |
| 1023 | |
| 1024 // thread has called JavaThread::exit() or is terminated | |
| 1025 bool is_exiting() { return _terminated == _thread_exiting || is_terminated(); } | |
| 1026 // thread is terminated (no longer on the threads list); we compare | |
| 1027 // against the two non-terminated values so that a freed JavaThread | |
| 1028 // will also be considered terminated. | |
| 1029 bool is_terminated() { return _terminated != _not_terminated && _terminated != _thread_exiting; } | |
| 1030 void set_terminated(TerminatedTypes t) { _terminated = t; } | |
| 1031 // special for Threads::remove() which is static: | |
| 1032 void set_terminated_value() { _terminated = _thread_terminated; } | |
| 1033 void block_if_vm_exited(); | |
| 1034 | |
| 1035 bool doing_unsafe_access() { return _doing_unsafe_access; } | |
| 1036 void set_doing_unsafe_access(bool val) { _doing_unsafe_access = val; } | |
| 1037 | |
| 1038 bool do_not_unlock_if_synchronized() { return _do_not_unlock_if_synchronized; } | |
| 1039 void set_do_not_unlock_if_synchronized(bool val) { _do_not_unlock_if_synchronized = val; } | |
| 1040 | |
| 6197 | 1041 // native memory tracking |
| 1042 inline MemRecorder* get_recorder() const { return (MemRecorder*)_recorder; } | |
| 1043 inline void set_recorder(MemRecorder* rc) { _recorder = (volatile MemRecorder*)rc; } | |
| 1044 | |
| 1045 private: | |
| 1046 // per-thread memory recorder | |
| 1047 volatile MemRecorder* _recorder; | |
| 0 | 1048 |
| 1049 // Suspend/resume support for JavaThread | |
| 1050 private: | |
| 1051 void set_ext_suspended() { set_suspend_flag (_ext_suspended); } | |
| 1052 void clear_ext_suspended() { clear_suspend_flag(_ext_suspended); } | |
| 1053 | |
| 1054 public: | |
| 1055 void java_suspend(); | |
| 1056 void java_resume(); | |
| 1057 int java_suspend_self(); | |
| 1058 | |
| 1059 void check_and_wait_while_suspended() { | |
| 1060 assert(JavaThread::current() == this, "sanity check"); | |
| 1061 | |
| 1062 bool do_self_suspend; | |
| 1063 do { | |
| 1064 // were we externally suspended while we were waiting? | |
| 1065 do_self_suspend = handle_special_suspend_equivalent_condition(); | |
| 1066 if (do_self_suspend) { | |
| 1067 // don't surprise the thread that suspended us by returning | |
| 1068 java_suspend_self(); | |
| 1069 set_suspend_equivalent(); | |
| 1070 } | |
| 1071 } while (do_self_suspend); | |
| 1072 } | |
| 1073 static void check_safepoint_and_suspend_for_native_trans(JavaThread *thread); | |
| 1074 // Check for async exception in addition to safepoint and suspend request. | |
| 1075 static void check_special_condition_for_native_trans(JavaThread *thread); | |
| 1076 | |
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1077 // Same as check_special_condition_for_native_trans but finishes the |
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1078 // transition into thread_in_Java mode so that it can potentially |
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1079 // block. |
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1080 static void check_special_condition_for_native_trans_and_transition(JavaThread *thread); |
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1081 |
| 0 | 1082 bool is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits); |
| 1083 bool is_ext_suspend_completed_with_lock(uint32_t *bits) { | |
| 1084 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1085 // Warning: is_ext_suspend_completed() may temporarily drop the | |
| 1086 // SR_lock to allow the thread to reach a stable thread state if | |
| 1087 // it is currently in a transient thread state. | |
| 1088 return is_ext_suspend_completed(false /*!called_by_wait */, | |
| 1089 SuspendRetryDelay, bits); | |
| 1090 } | |
| 1091 | |
| 1092 // We cannot allow wait_for_ext_suspend_completion() to run forever or | |
| 1093 // we could hang. SuspendRetryCount and SuspendRetryDelay are normally | |
| 1094 // passed as the count and delay parameters. Experiments with specific | |
| 1095 // calls to wait_for_ext_suspend_completion() can be done by passing | |
| 1096 // other values in the code. Experiments with all calls can be done | |
| 1097 // via the appropriate -XX options. | |
| 1098 bool wait_for_ext_suspend_completion(int count, int delay, uint32_t *bits); | |
| 1099 | |
| 1100 void set_external_suspend() { set_suspend_flag (_external_suspend); } | |
| 1101 void clear_external_suspend() { clear_suspend_flag(_external_suspend); } | |
| 1102 | |
| 1103 void set_deopt_suspend() { set_suspend_flag (_deopt_suspend); } | |
| 1104 void clear_deopt_suspend() { clear_suspend_flag(_deopt_suspend); } | |
| 1105 bool is_deopt_suspend() { return (_suspend_flags & _deopt_suspend) != 0; } | |
| 1106 | |
| 1107 bool is_external_suspend() const { | |
| 1108 return (_suspend_flags & _external_suspend) != 0; | |
| 1109 } | |
| 1110 // Whenever a thread transitions from native to vm/java it must suspend | |
| 1111 // if external|deopt suspend is present. | |
| 1112 bool is_suspend_after_native() const { | |
| 1113 return (_suspend_flags & (_external_suspend | _deopt_suspend) ) != 0; | |
| 1114 } | |
| 1115 | |
| 1116 // external suspend request is completed | |
| 1117 bool is_ext_suspended() const { | |
| 1118 return (_suspend_flags & _ext_suspended) != 0; | |
| 1119 } | |
| 1120 | |
| 1121 bool is_external_suspend_with_lock() const { | |
| 1122 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1123 return is_external_suspend(); | |
| 1124 } | |
| 1125 | |
| 1126 // Special method to handle a pending external suspend request | |
| 1127 // when a suspend equivalent condition lifts. | |
| 1128 bool handle_special_suspend_equivalent_condition() { | |
| 1129 assert(is_suspend_equivalent(), | |
| 1130 "should only be called in a suspend equivalence condition"); | |
| 1131 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1132 bool ret = is_external_suspend(); | |
| 1133 if (!ret) { | |
| 1134 // not about to self-suspend so clear suspend equivalence | |
| 1135 clear_suspend_equivalent(); | |
| 1136 } | |
| 1137 // implied else: | |
| 1138 // We have a pending external suspend request so we leave the | |
| 1139 // suspend_equivalent flag set until java_suspend_self() sets | |
| 1140 // the ext_suspended flag and clears the suspend_equivalent | |
| 1141 // flag. This insures that wait_for_ext_suspend_completion() | |
| 1142 // will return consistent values. | |
| 1143 return ret; | |
| 1144 } | |
| 1145 | |
| 1146 // utility methods to see if we are doing some kind of suspension | |
| 1147 bool is_being_ext_suspended() const { | |
| 1148 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1149 return is_ext_suspended() || is_external_suspend(); | |
| 1150 } | |
| 1151 | |
| 1152 bool is_suspend_equivalent() const { return _suspend_equivalent; } | |
| 1153 | |
| 1154 void set_suspend_equivalent() { _suspend_equivalent = true; }; | |
| 1155 void clear_suspend_equivalent() { _suspend_equivalent = false; }; | |
| 1156 | |
| 1157 // Thread.stop support | |
| 1158 void send_thread_stop(oop throwable); | |
| 1159 AsyncRequests clear_special_runtime_exit_condition() { | |
| 1160 AsyncRequests x = _special_runtime_exit_condition; | |
| 1161 _special_runtime_exit_condition = _no_async_condition; | |
| 1162 return x; | |
| 1163 } | |
| 1164 | |
| 1165 // Are any async conditions present? | |
| 1166 bool has_async_condition() { return (_special_runtime_exit_condition != _no_async_condition); } | |
| 1167 | |
| 1168 void check_and_handle_async_exceptions(bool check_unsafe_error = true); | |
| 1169 | |
| 1170 // these next two are also used for self-suspension and async exception support | |
| 1171 void handle_special_runtime_exit_condition(bool check_asyncs = true); | |
| 1172 | |
| 1173 // Return true if JavaThread has an asynchronous condition or | |
| 1174 // if external suspension is requested. | |
| 1175 bool has_special_runtime_exit_condition() { | |
| 1176 // We call is_external_suspend() last since external suspend should | |
| 1177 // be less common. Because we don't use is_external_suspend_with_lock | |
| 1178 // it is possible that we won't see an asynchronous external suspend | |
| 1179 // request that has just gotten started, i.e., SR_lock grabbed but | |
| 1180 // _external_suspend field change either not made yet or not visible | |
| 1181 // yet. However, this is okay because the request is asynchronous and | |
| 1182 // we will see the new flag value the next time through. It's also | |
| 1183 // possible that the external suspend request is dropped after | |
| 1184 // we have checked is_external_suspend(), we will recheck its value | |
| 1185 // under SR_lock in java_suspend_self(). | |
| 1186 return (_special_runtime_exit_condition != _no_async_condition) || | |
| 1187 is_external_suspend() || is_deopt_suspend(); | |
| 1188 } | |
| 1189 | |
| 1190 void set_pending_unsafe_access_error() { _special_runtime_exit_condition = _async_unsafe_access_error; } | |
| 1191 | |
| 1192 void set_pending_async_exception(oop e) { | |
| 1193 _pending_async_exception = e; | |
| 1194 _special_runtime_exit_condition = _async_exception; | |
| 1195 set_has_async_exception(); | |
| 1196 } | |
| 1197 | |
| 1198 // Fast-locking support | |
| 1199 bool is_lock_owned(address adr) const; | |
| 1200 | |
| 1201 // Accessors for vframe array top | |
| 1202 // The linked list of vframe arrays are sorted on sp. This means when we | |
| 1203 // unpack the head must contain the vframe array to unpack. | |
| 1204 void set_vframe_array_head(vframeArray* value) { _vframe_array_head = value; } | |
| 1205 vframeArray* vframe_array_head() const { return _vframe_array_head; } | |
| 1206 | |
| 1207 // Side structure for defering update of java frame locals until deopt occurs | |
| 1208 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred_locals() const { return _deferred_locals_updates; } | |
| 1209 void set_deferred_locals(GrowableArray<jvmtiDeferredLocalVariableSet *>* vf) { _deferred_locals_updates = vf; } | |
| 1210 | |
| 1211 // These only really exist to make debugging deopt problems simpler | |
| 1212 | |
| 1213 void set_vframe_array_last(vframeArray* value) { _vframe_array_last = value; } | |
| 1214 vframeArray* vframe_array_last() const { return _vframe_array_last; } | |
| 1215 | |
| 1216 // The special resourceMark used during deoptimization | |
| 1217 | |
| 1218 void set_deopt_mark(DeoptResourceMark* value) { _deopt_mark = value; } | |
| 1219 DeoptResourceMark* deopt_mark(void) { return _deopt_mark; } | |
| 1220 | |
| 1221 intptr_t* must_deopt_id() { return _must_deopt_id; } | |
| 1222 void set_must_deopt_id(intptr_t* id) { _must_deopt_id = id; } | |
| 1223 void clear_must_deopt_id() { _must_deopt_id = NULL; } | |
| 1224 | |
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1225 void set_deopt_nmethod(nmethod* nm) { _deopt_nmethod = nm; } |
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1226 nmethod* deopt_nmethod() { return _deopt_nmethod; } |
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1227 |
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1228 Method* callee_target() const { return _callee_target; } |
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1229 void set_callee_target (Method* x) { _callee_target = x; } |
| 0 | 1230 |
| 1231 // Oop results of vm runtime calls | |
| 1232 oop vm_result() const { return _vm_result; } | |
| 1233 void set_vm_result (oop x) { _vm_result = x; } | |
| 1234 | |
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1235 Metadata* vm_result_2() const { return _vm_result_2; } |
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1236 void set_vm_result_2 (Metadata* x) { _vm_result_2 = x; } |
| 0 | 1237 |
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1238 MemRegion deferred_card_mark() const { return _deferred_card_mark; } |
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1239 void set_deferred_card_mark(MemRegion mr) { _deferred_card_mark = mr; } |
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1240 |
| 0 | 1241 // Exception handling for compiled methods |
| 1242 oop exception_oop() const { return _exception_oop; } | |
| 1243 address exception_pc() const { return _exception_pc; } | |
| 1244 address exception_handler_pc() const { return _exception_handler_pc; } | |
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1245 bool is_method_handle_return() const { return _is_method_handle_return == 1; } |
| 0 | 1246 |
| 1247 void set_exception_oop(oop o) { _exception_oop = o; } | |
| 1248 void set_exception_pc(address a) { _exception_pc = a; } | |
| 1249 void set_exception_handler_pc(address a) { _exception_handler_pc = a; } | |
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1250 void set_is_method_handle_return(bool value) { _is_method_handle_return = value ? 1 : 0; } |
| 0 | 1251 |
| 1252 // Stack overflow support | |
| 1253 inline size_t stack_available(address cur_sp); | |
| 1254 address stack_yellow_zone_base() | |
| 1255 { return (address)(stack_base() - (stack_size() - (stack_red_zone_size() + stack_yellow_zone_size()))); } | |
| 1256 size_t stack_yellow_zone_size() | |
| 1257 { return StackYellowPages * os::vm_page_size(); } | |
| 1258 address stack_red_zone_base() | |
| 1259 { return (address)(stack_base() - (stack_size() - stack_red_zone_size())); } | |
| 1260 size_t stack_red_zone_size() | |
| 1261 { return StackRedPages * os::vm_page_size(); } | |
| 1262 bool in_stack_yellow_zone(address a) | |
| 1263 { return (a <= stack_yellow_zone_base()) && (a >= stack_red_zone_base()); } | |
| 1264 bool in_stack_red_zone(address a) | |
| 1265 { return (a <= stack_red_zone_base()) && (a >= (address)((intptr_t)stack_base() - stack_size())); } | |
| 1266 | |
| 1267 void create_stack_guard_pages(); | |
| 1268 void remove_stack_guard_pages(); | |
| 1269 | |
| 1270 void enable_stack_yellow_zone(); | |
| 1271 void disable_stack_yellow_zone(); | |
| 1272 void enable_stack_red_zone(); | |
| 1273 void disable_stack_red_zone(); | |
| 1274 | |
| 1275 inline bool stack_yellow_zone_disabled(); | |
| 1276 inline bool stack_yellow_zone_enabled(); | |
| 1277 | |
| 1278 // Attempt to reguard the stack after a stack overflow may have occurred. | |
| 1279 // Returns true if (a) guard pages are not needed on this thread, (b) the | |
| 1280 // pages are already guarded, or (c) the pages were successfully reguarded. | |
| 1281 // Returns false if there is not enough stack space to reguard the pages, in | |
| 1282 // which case the caller should unwind a frame and try again. The argument | |
| 1283 // should be the caller's (approximate) sp. | |
| 1284 bool reguard_stack(address cur_sp); | |
| 1285 // Similar to above but see if current stackpoint is out of the guard area | |
| 1286 // and reguard if possible. | |
| 1287 bool reguard_stack(void); | |
| 1288 | |
| 1289 // Misc. accessors/mutators | |
| 1290 void set_do_not_unlock(void) { _do_not_unlock_if_synchronized = true; } | |
| 1291 void clr_do_not_unlock(void) { _do_not_unlock_if_synchronized = false; } | |
| 1292 bool do_not_unlock(void) { return _do_not_unlock_if_synchronized; } | |
| 1293 | |
| 1294 #ifndef PRODUCT | |
| 1295 void record_jump(address target, address instr, const char* file, int line); | |
| 1296 #endif /* PRODUCT */ | |
| 1297 | |
| 1298 // For assembly stub generation | |
| 1299 static ByteSize threadObj_offset() { return byte_offset_of(JavaThread, _threadObj ); } | |
| 1300 #ifndef PRODUCT | |
| 1301 static ByteSize jmp_ring_index_offset() { return byte_offset_of(JavaThread, _jmp_ring_index ); } | |
| 1302 static ByteSize jmp_ring_offset() { return byte_offset_of(JavaThread, _jmp_ring ); } | |
| 1303 #endif /* PRODUCT */ | |
| 1304 static ByteSize jni_environment_offset() { return byte_offset_of(JavaThread, _jni_environment ); } | |
| 1305 static ByteSize last_Java_sp_offset() { | |
| 1306 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_sp_offset(); | |
| 1307 } | |
| 1308 static ByteSize last_Java_pc_offset() { | |
| 1309 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_pc_offset(); | |
| 1310 } | |
| 1311 static ByteSize frame_anchor_offset() { | |
| 1312 return byte_offset_of(JavaThread, _anchor); | |
| 1313 } | |
| 1314 static ByteSize callee_target_offset() { return byte_offset_of(JavaThread, _callee_target ); } | |
| 1315 static ByteSize vm_result_offset() { return byte_offset_of(JavaThread, _vm_result ); } | |
| 1316 static ByteSize vm_result_2_offset() { return byte_offset_of(JavaThread, _vm_result_2 ); } | |
| 1317 static ByteSize thread_state_offset() { return byte_offset_of(JavaThread, _thread_state ); } | |
| 1318 static ByteSize saved_exception_pc_offset() { return byte_offset_of(JavaThread, _saved_exception_pc ); } | |
| 1319 static ByteSize osthread_offset() { return byte_offset_of(JavaThread, _osthread ); } | |
| 1320 static ByteSize exception_oop_offset() { return byte_offset_of(JavaThread, _exception_oop ); } | |
| 1321 static ByteSize exception_pc_offset() { return byte_offset_of(JavaThread, _exception_pc ); } | |
| 1322 static ByteSize exception_handler_pc_offset() { return byte_offset_of(JavaThread, _exception_handler_pc); } | |
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1323 static ByteSize is_method_handle_return_offset() { return byte_offset_of(JavaThread, _is_method_handle_return); } |
| 0 | 1324 static ByteSize stack_guard_state_offset() { return byte_offset_of(JavaThread, _stack_guard_state ); } |
| 1325 static ByteSize suspend_flags_offset() { return byte_offset_of(JavaThread, _suspend_flags ); } | |
| 1326 | |
| 1327 static ByteSize do_not_unlock_if_synchronized_offset() { return byte_offset_of(JavaThread, _do_not_unlock_if_synchronized); } | |
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1328 static ByteSize should_post_on_exceptions_flag_offset() { |
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1329 return byte_offset_of(JavaThread, _should_post_on_exceptions_flag); |
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1330 } |
| 0 | 1331 |
| 342 | 1332 #ifndef SERIALGC |
| 1333 static ByteSize satb_mark_queue_offset() { return byte_offset_of(JavaThread, _satb_mark_queue); } | |
| 1334 static ByteSize dirty_card_queue_offset() { return byte_offset_of(JavaThread, _dirty_card_queue); } | |
| 1335 #endif // !SERIALGC | |
| 1336 | |
| 0 | 1337 // Returns the jni environment for this thread |
| 1338 JNIEnv* jni_environment() { return &_jni_environment; } | |
| 1339 | |
| 1340 static JavaThread* thread_from_jni_environment(JNIEnv* env) { | |
| 1341 JavaThread *thread_from_jni_env = (JavaThread*)((intptr_t)env - in_bytes(jni_environment_offset())); | |
| 1342 // Only return NULL if thread is off the thread list; starting to | |
| 1343 // exit should not return NULL. | |
| 1344 if (thread_from_jni_env->is_terminated()) { | |
| 1345 thread_from_jni_env->block_if_vm_exited(); | |
| 1346 return NULL; | |
| 1347 } else { | |
| 1348 return thread_from_jni_env; | |
| 1349 } | |
| 1350 } | |
| 1351 | |
| 1352 // JNI critical regions. These can nest. | |
| 1353 bool in_critical() { return _jni_active_critical > 0; } | |
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1354 bool in_last_critical() { return _jni_active_critical == 1; } |
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1355 void enter_critical() { assert(Thread::current() == this || |
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1356 Thread::current()->is_VM_thread() && SafepointSynchronize::is_synchronizing(), |
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1357 "this must be current thread or synchronizing"); |
| 0 | 1358 _jni_active_critical++; } |
| 1359 void exit_critical() { assert(Thread::current() == this, | |
| 1360 "this must be current thread"); | |
| 1361 _jni_active_critical--; | |
| 1362 assert(_jni_active_critical >= 0, | |
| 1363 "JNI critical nesting problem?"); } | |
| 1364 | |
| 1365 // For deadlock detection | |
| 1366 int depth_first_number() { return _depth_first_number; } | |
| 1367 void set_depth_first_number(int dfn) { _depth_first_number = dfn; } | |
| 1368 | |
| 1369 private: | |
| 1370 void set_monitor_chunks(MonitorChunk* monitor_chunks) { _monitor_chunks = monitor_chunks; } | |
| 1371 | |
| 1372 public: | |
| 1373 MonitorChunk* monitor_chunks() const { return _monitor_chunks; } | |
| 1374 void add_monitor_chunk(MonitorChunk* chunk); | |
| 1375 void remove_monitor_chunk(MonitorChunk* chunk); | |
| 1376 bool in_deopt_handler() const { return _in_deopt_handler > 0; } | |
| 1377 void inc_in_deopt_handler() { _in_deopt_handler++; } | |
| 1378 void dec_in_deopt_handler() { | |
| 1379 assert(_in_deopt_handler > 0, "mismatched deopt nesting"); | |
| 1380 if (_in_deopt_handler > 0) { // robustness | |
| 1381 _in_deopt_handler--; | |
| 1382 } | |
| 1383 } | |
| 1384 | |
| 1385 private: | |
| 1386 void set_entry_point(ThreadFunction entry_point) { _entry_point = entry_point; } | |
| 1387 | |
| 1388 public: | |
| 1389 | |
| 1390 // Frame iteration; calls the function f for all frames on the stack | |
| 1391 void frames_do(void f(frame*, const RegisterMap*)); | |
| 1392 | |
| 1393 // Memory operations | |
|
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1394 void oops_do(OopClosure* f, CodeBlobClosure* cf); |
| 0 | 1395 |
| 1396 // Sweeper operations | |
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1397 void nmethods_do(CodeBlobClosure* cf); |
| 0 | 1398 |
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1399 // RedefineClasses Support |
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1400 void metadata_do(void f(Metadata*)); |
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1401 |
| 0 | 1402 // Memory management operations |
| 1403 void gc_epilogue(); | |
| 1404 void gc_prologue(); | |
| 1405 | |
| 1406 // Misc. operations | |
| 1407 char* name() const { return (char*)get_thread_name(); } | |
| 1408 void print_on(outputStream* st) const; | |
| 1409 void print() const { print_on(tty); } | |
| 1410 void print_value(); | |
| 1411 void print_thread_state_on(outputStream* ) const PRODUCT_RETURN; | |
| 1412 void print_thread_state() const PRODUCT_RETURN; | |
| 1413 void print_on_error(outputStream* st, char* buf, int buflen) const; | |
| 1414 void verify(); | |
| 1415 const char* get_thread_name() const; | |
| 1416 private: | |
| 1417 // factor out low-level mechanics for use in both normal and error cases | |
| 1418 const char* get_thread_name_string(char* buf = NULL, int buflen = 0) const; | |
| 1419 public: | |
| 1420 const char* get_threadgroup_name() const; | |
| 1421 const char* get_parent_name() const; | |
| 1422 | |
| 1423 // Accessing frames | |
| 1424 frame last_frame() { | |
| 1425 _anchor.make_walkable(this); | |
| 1426 return pd_last_frame(); | |
| 1427 } | |
| 1428 javaVFrame* last_java_vframe(RegisterMap* reg_map); | |
| 1429 | |
| 1430 // Returns method at 'depth' java or native frames down the stack | |
| 1431 // Used for security checks | |
|
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1432 Klass* security_get_caller_class(int depth); |
| 0 | 1433 |
| 1434 // Print stack trace in external format | |
| 1435 void print_stack_on(outputStream* st); | |
| 1436 void print_stack() { print_stack_on(tty); } | |
| 1437 | |
| 1438 // Print stack traces in various internal formats | |
| 1439 void trace_stack() PRODUCT_RETURN; | |
| 1440 void trace_stack_from(vframe* start_vf) PRODUCT_RETURN; | |
| 1441 void trace_frames() PRODUCT_RETURN; | |
|
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1442 void trace_oops() PRODUCT_RETURN; |
| 0 | 1443 |
|
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1444 // Print an annotated view of the stack frames |
|
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1445 void print_frame_layout(int depth = 0, bool validate_only = false) NOT_DEBUG_RETURN; |
|
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1446 void validate_frame_layout() { |
|
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1447 print_frame_layout(0, true); |
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1448 } |
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1449 |
| 0 | 1450 // Returns the number of stack frames on the stack |
| 1451 int depth() const; | |
| 1452 | |
| 1453 // Function for testing deoptimization | |
| 1454 void deoptimize(); | |
| 1455 void make_zombies(); | |
| 1456 | |
| 1457 void deoptimized_wrt_marked_nmethods(); | |
| 1458 | |
| 1459 // Profiling operation (see fprofile.cpp) | |
| 1460 public: | |
| 1461 bool profile_last_Java_frame(frame* fr); | |
| 1462 | |
| 1463 private: | |
| 1464 ThreadProfiler* _thread_profiler; | |
| 1465 private: | |
| 1466 friend class FlatProfiler; // uses both [gs]et_thread_profiler. | |
| 1467 friend class FlatProfilerTask; // uses get_thread_profiler. | |
| 1468 friend class ThreadProfilerMark; // uses get_thread_profiler. | |
| 1469 ThreadProfiler* get_thread_profiler() { return _thread_profiler; } | |
| 1470 ThreadProfiler* set_thread_profiler(ThreadProfiler* tp) { | |
| 1471 ThreadProfiler* result = _thread_profiler; | |
| 1472 _thread_profiler = tp; | |
| 1473 return result; | |
| 1474 } | |
| 1475 | |
| 6197 | 1476 // NMT (Native memory tracking) support. |
| 1477 // This flag helps NMT to determine if this JavaThread will be blocked | |
| 1478 // at safepoint. If not, ThreadCritical is needed for writing memory records. | |
| 1479 // JavaThread is only safepoint visible when it is in Threads' thread list, | |
| 1480 // it is not visible until it is added to the list and becomes invisible | |
| 1481 // once it is removed from the list. | |
| 1482 public: | |
| 1483 bool is_safepoint_visible() const { return _safepoint_visible; } | |
| 1484 void set_safepoint_visible(bool visible) { _safepoint_visible = visible; } | |
| 1485 private: | |
| 1486 bool _safepoint_visible; | |
| 1487 | |
| 0 | 1488 // Static operations |
| 1489 public: | |
| 1490 // Returns the running thread as a JavaThread | |
| 1491 static inline JavaThread* current(); | |
| 1492 | |
| 1493 // Returns the active Java thread. Do not use this if you know you are calling | |
| 1494 // from a JavaThread, as it's slower than JavaThread::current. If called from | |
| 1495 // the VMThread, it also returns the JavaThread that instigated the VMThread's | |
| 1496 // operation. You may not want that either. | |
| 1497 static JavaThread* active(); | |
| 1498 | |
| 1499 inline CompilerThread* as_CompilerThread(); | |
| 1500 | |
| 1501 public: | |
| 1502 virtual void run(); | |
| 1503 void thread_main_inner(); | |
| 1504 | |
| 1505 private: | |
| 1506 // PRIVILEGED STACK | |
| 1507 PrivilegedElement* _privileged_stack_top; | |
| 1508 GrowableArray<oop>* _array_for_gc; | |
| 1509 public: | |
| 1510 | |
| 1511 // Returns the privileged_stack information. | |
| 1512 PrivilegedElement* privileged_stack_top() const { return _privileged_stack_top; } | |
| 1513 void set_privileged_stack_top(PrivilegedElement *e) { _privileged_stack_top = e; } | |
| 1514 void register_array_for_gc(GrowableArray<oop>* array) { _array_for_gc = array; } | |
| 1515 | |
| 1516 public: | |
| 1517 // Thread local information maintained by JVMTI. | |
| 1518 void set_jvmti_thread_state(JvmtiThreadState *value) { _jvmti_thread_state = value; } | |
|
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1519 // A JvmtiThreadState is lazily allocated. This jvmti_thread_state() |
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1520 // getter is used to get this JavaThread's JvmtiThreadState if it has |
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1521 // one which means NULL can be returned. JvmtiThreadState::state_for() |
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1522 // is used to get the specified JavaThread's JvmtiThreadState if it has |
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1523 // one or it allocates a new JvmtiThreadState for the JavaThread and |
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1524 // returns it. JvmtiThreadState::state_for() will return NULL only if |
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1525 // the specified JavaThread is exiting. |
| 0 | 1526 JvmtiThreadState *jvmti_thread_state() const { return _jvmti_thread_state; } |
| 1527 static ByteSize jvmti_thread_state_offset() { return byte_offset_of(JavaThread, _jvmti_thread_state); } | |
| 1528 void set_jvmti_get_loaded_classes_closure(JvmtiGetLoadedClassesClosure* value) { _jvmti_get_loaded_classes_closure = value; } | |
| 1529 JvmtiGetLoadedClassesClosure* get_jvmti_get_loaded_classes_closure() const { return _jvmti_get_loaded_classes_closure; } | |
| 1530 | |
| 1531 // JVMTI PopFrame support | |
| 1532 // Setting and clearing popframe_condition | |
| 1533 // All of these enumerated values are bits. popframe_pending | |
| 1534 // indicates that a PopFrame() has been requested and not yet been | |
| 1535 // completed. popframe_processing indicates that that PopFrame() is in | |
| 1536 // the process of being completed. popframe_force_deopt_reexecution_bit | |
| 1537 // indicates that special handling is required when returning to a | |
| 1538 // deoptimized caller. | |
| 1539 enum PopCondition { | |
| 1540 popframe_inactive = 0x00, | |
| 1541 popframe_pending_bit = 0x01, | |
| 1542 popframe_processing_bit = 0x02, | |
| 1543 popframe_force_deopt_reexecution_bit = 0x04 | |
| 1544 }; | |
| 1545 PopCondition popframe_condition() { return (PopCondition) _popframe_condition; } | |
| 1546 void set_popframe_condition(PopCondition c) { _popframe_condition = c; } | |
| 1547 void set_popframe_condition_bit(PopCondition c) { _popframe_condition |= c; } | |
| 1548 void clear_popframe_condition() { _popframe_condition = popframe_inactive; } | |
| 1549 static ByteSize popframe_condition_offset() { return byte_offset_of(JavaThread, _popframe_condition); } | |
| 1550 bool has_pending_popframe() { return (popframe_condition() & popframe_pending_bit) != 0; } | |
| 1551 bool popframe_forcing_deopt_reexecution() { return (popframe_condition() & popframe_force_deopt_reexecution_bit) != 0; } | |
| 1552 void clear_popframe_forcing_deopt_reexecution() { _popframe_condition &= ~popframe_force_deopt_reexecution_bit; } | |
| 1553 #ifdef CC_INTERP | |
| 1554 bool pop_frame_pending(void) { return ((_popframe_condition & popframe_pending_bit) != 0); } | |
| 1555 void clr_pop_frame_pending(void) { _popframe_condition = popframe_inactive; } | |
| 1556 bool pop_frame_in_process(void) { return ((_popframe_condition & popframe_processing_bit) != 0); } | |
| 1557 void set_pop_frame_in_process(void) { _popframe_condition |= popframe_processing_bit; } | |
| 1558 void clr_pop_frame_in_process(void) { _popframe_condition &= ~popframe_processing_bit; } | |
| 1559 #endif | |
| 1560 | |
| 1561 private: | |
| 1562 // Saved incoming arguments to popped frame. | |
| 1563 // Used only when popped interpreted frame returns to deoptimized frame. | |
| 1564 void* _popframe_preserved_args; | |
| 1565 int _popframe_preserved_args_size; | |
| 1566 | |
| 1567 public: | |
| 1568 void popframe_preserve_args(ByteSize size_in_bytes, void* start); | |
| 1569 void* popframe_preserved_args(); | |
| 1570 ByteSize popframe_preserved_args_size(); | |
| 1571 WordSize popframe_preserved_args_size_in_words(); | |
| 1572 void popframe_free_preserved_args(); | |
| 1573 | |
| 1574 | |
| 1575 private: | |
| 1576 JvmtiThreadState *_jvmti_thread_state; | |
| 1577 JvmtiGetLoadedClassesClosure* _jvmti_get_loaded_classes_closure; | |
| 1578 | |
| 1579 // Used by the interpreter in fullspeed mode for frame pop, method | |
| 1580 // entry, method exit and single stepping support. This field is | |
| 1581 // only set to non-zero by the VM_EnterInterpOnlyMode VM operation. | |
| 1582 // It can be set to zero asynchronously (i.e., without a VM operation | |
| 1583 // or a lock) so we have to be very careful. | |
| 1584 int _interp_only_mode; | |
| 1585 | |
| 1586 public: | |
| 1587 // used by the interpreter for fullspeed debugging support (see above) | |
| 1588 static ByteSize interp_only_mode_offset() { return byte_offset_of(JavaThread, _interp_only_mode); } | |
| 1589 bool is_interp_only_mode() { return (_interp_only_mode != 0); } | |
| 1590 int get_interp_only_mode() { return _interp_only_mode; } | |
| 1591 void increment_interp_only_mode() { ++_interp_only_mode; } | |
| 1592 void decrement_interp_only_mode() { --_interp_only_mode; } | |
| 1593 | |
|
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1594 // support for cached flag that indicates whether exceptions need to be posted for this thread |
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1595 // if this is false, we can avoid deoptimizing when events are thrown |
|
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1596 // this gets set to reflect whether jvmtiExport::post_exception_throw would actually do anything |
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1597 private: |
|
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1598 int _should_post_on_exceptions_flag; |
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1599 |
|
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1600 public: |
|
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1601 int should_post_on_exceptions_flag() { return _should_post_on_exceptions_flag; } |
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1602 void set_should_post_on_exceptions_flag(int val) { _should_post_on_exceptions_flag = val; } |
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1603 |
| 0 | 1604 private: |
| 1605 ThreadStatistics *_thread_stat; | |
| 1606 | |
| 1607 public: | |
| 1608 ThreadStatistics* get_thread_stat() const { return _thread_stat; } | |
| 1609 | |
| 1610 // Return a blocker object for which this thread is blocked parking. | |
| 1611 oop current_park_blocker(); | |
| 1612 | |
| 1613 private: | |
| 1614 static size_t _stack_size_at_create; | |
| 1615 | |
| 1616 public: | |
| 1617 static inline size_t stack_size_at_create(void) { | |
| 1618 return _stack_size_at_create; | |
| 1619 } | |
| 1620 static inline void set_stack_size_at_create(size_t value) { | |
| 1621 _stack_size_at_create = value; | |
| 1622 } | |
| 1623 | |
| 342 | 1624 #ifndef SERIALGC |
| 1625 // SATB marking queue support | |
| 1626 ObjPtrQueue& satb_mark_queue() { return _satb_mark_queue; } | |
| 1627 static SATBMarkQueueSet& satb_mark_queue_set() { | |
| 1628 return _satb_mark_queue_set; | |
| 1629 } | |
| 1630 | |
| 1631 // Dirty card queue support | |
| 1632 DirtyCardQueue& dirty_card_queue() { return _dirty_card_queue; } | |
| 1633 static DirtyCardQueueSet& dirty_card_queue_set() { | |
| 1634 return _dirty_card_queue_set; | |
| 1635 } | |
| 1636 #endif // !SERIALGC | |
| 1637 | |
|
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1638 // This method initializes the SATB and dirty card queues before a |
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1639 // JavaThread is added to the Java thread list. Right now, we don't |
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1640 // have to do anything to the dirty card queue (it should have been |
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1641 // activated when the thread was created), but we have to activate |
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1642 // the SATB queue if the thread is created while a marking cycle is |
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|
1643 // in progress. The activation / de-activation of the SATB queues at |
|
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1644 // the beginning / end of a marking cycle is done during safepoints |
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1645 // so we have to make sure this method is called outside one to be |
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|
1646 // able to safely read the active field of the SATB queue set. Right |
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|
1647 // now, it is called just before the thread is added to the Java |
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|
1648 // thread list in the Threads::add() method. That method is holding |
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|
1649 // the Threads_lock which ensures we are outside a safepoint. We |
|
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|
1650 // cannot do the obvious and set the active field of the SATB queue |
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|
1651 // when the thread is created given that, in some cases, safepoints |
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1652 // might happen between the JavaThread constructor being called and the |
|
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1653 // thread being added to the Java thread list (an example of this is |
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1654 // when the structure for the DestroyJavaVM thread is created). |
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1655 #ifndef SERIALGC |
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1656 void initialize_queues(); |
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1657 #else // !SERIALGC |
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1658 void initialize_queues() { } |
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1659 #endif // !SERIALGC |
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1660 |
| 0 | 1661 // Machine dependent stuff |
| 1972 | 1662 #ifdef TARGET_OS_ARCH_linux_x86 |
| 1663 # include "thread_linux_x86.hpp" | |
| 1664 #endif | |
| 1665 #ifdef TARGET_OS_ARCH_linux_sparc | |
| 1666 # include "thread_linux_sparc.hpp" | |
| 1667 #endif | |
| 1668 #ifdef TARGET_OS_ARCH_linux_zero | |
| 1669 # include "thread_linux_zero.hpp" | |
| 1670 #endif | |
| 1671 #ifdef TARGET_OS_ARCH_solaris_x86 | |
| 1672 # include "thread_solaris_x86.hpp" | |
| 1673 #endif | |
| 1674 #ifdef TARGET_OS_ARCH_solaris_sparc | |
| 1675 # include "thread_solaris_sparc.hpp" | |
| 1676 #endif | |
| 1677 #ifdef TARGET_OS_ARCH_windows_x86 | |
| 1678 # include "thread_windows_x86.hpp" | |
| 1679 #endif | |
|
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1680 #ifdef TARGET_OS_ARCH_linux_arm |
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1681 # include "thread_linux_arm.hpp" |
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1682 #endif |
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1683 #ifdef TARGET_OS_ARCH_linux_ppc |
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1684 # include "thread_linux_ppc.hpp" |
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1685 #endif |
| 3960 | 1686 #ifdef TARGET_OS_ARCH_bsd_x86 |
| 1687 # include "thread_bsd_x86.hpp" | |
| 1688 #endif | |
| 1689 #ifdef TARGET_OS_ARCH_bsd_zero | |
| 1690 # include "thread_bsd_zero.hpp" | |
| 1691 #endif | |
| 1972 | 1692 |
| 0 | 1693 |
| 1694 public: | |
| 1695 void set_blocked_on_compilation(bool value) { | |
| 1696 _blocked_on_compilation = value; | |
| 1697 } | |
| 1698 | |
| 1699 bool blocked_on_compilation() { | |
| 1700 return _blocked_on_compilation; | |
| 1701 } | |
| 1702 protected: | |
| 1703 bool _blocked_on_compilation; | |
| 1704 | |
| 1705 | |
| 1706 // JSR166 per-thread parker | |
| 1707 private: | |
| 1708 Parker* _parker; | |
| 1709 public: | |
| 1710 Parker* parker() { return _parker; } | |
| 1711 | |
| 1712 // Biased locking support | |
| 1713 private: | |
| 1714 GrowableArray<MonitorInfo*>* _cached_monitor_info; | |
| 1715 public: | |
| 1716 GrowableArray<MonitorInfo*>* cached_monitor_info() { return _cached_monitor_info; } | |
| 1717 void set_cached_monitor_info(GrowableArray<MonitorInfo*>* info) { _cached_monitor_info = info; } | |
| 1718 | |
| 1719 // clearing/querying jni attach status | |
| 4006 | 1720 bool is_attaching_via_jni() const { return _jni_attach_state == _attaching_via_jni; } |
| 1721 bool has_attached_via_jni() const { return is_attaching_via_jni() || _jni_attach_state == _attached_via_jni; } | |
| 1722 void set_done_attaching_via_jni() { _jni_attach_state = _attached_via_jni; OrderAccess::fence(); } | |
| 342 | 1723 private: |
| 1724 // This field is used to determine if a thread has claimed | |
| 1725 // a par_id: it is -1 if the thread has not claimed a par_id; | |
| 1726 // otherwise its value is the par_id that has been claimed. | |
| 1727 int _claimed_par_id; | |
| 1728 public: | |
| 1729 int get_claimed_par_id() { return _claimed_par_id; } | |
| 1730 void set_claimed_par_id(int id) { _claimed_par_id = id;} | |
| 0 | 1731 }; |
| 1732 | |
| 1733 // Inline implementation of JavaThread::current | |
| 1734 inline JavaThread* JavaThread::current() { | |
| 1735 Thread* thread = ThreadLocalStorage::thread(); | |
| 1736 assert(thread != NULL && thread->is_Java_thread(), "just checking"); | |
| 1737 return (JavaThread*)thread; | |
| 1738 } | |
| 1739 | |
| 1740 inline CompilerThread* JavaThread::as_CompilerThread() { | |
| 1741 assert(is_Compiler_thread(), "just checking"); | |
| 1742 return (CompilerThread*)this; | |
| 1743 } | |
| 1744 | |
| 1745 inline bool JavaThread::stack_yellow_zone_disabled() { | |
| 1746 return _stack_guard_state == stack_guard_yellow_disabled; | |
| 1747 } | |
| 1748 | |
| 1749 inline bool JavaThread::stack_yellow_zone_enabled() { | |
| 1750 #ifdef ASSERT | |
| 1751 if (os::uses_stack_guard_pages()) { | |
| 1752 assert(_stack_guard_state != stack_guard_unused, "guard pages must be in use"); | |
| 1753 } | |
| 1754 #endif | |
| 1755 return _stack_guard_state == stack_guard_enabled; | |
| 1756 } | |
| 1757 | |
| 1758 inline size_t JavaThread::stack_available(address cur_sp) { | |
| 1759 // This code assumes java stacks grow down | |
| 1760 address low_addr; // Limit on the address for deepest stack depth | |
| 1761 if ( _stack_guard_state == stack_guard_unused) { | |
| 1762 low_addr = stack_base() - stack_size(); | |
| 1763 } else { | |
| 1764 low_addr = stack_yellow_zone_base(); | |
| 1765 } | |
| 1766 return cur_sp > low_addr ? cur_sp - low_addr : 0; | |
| 1767 } | |
| 1768 | |
| 1769 // A thread used for Compilation. | |
| 1770 class CompilerThread : public JavaThread { | |
| 1771 friend class VMStructs; | |
| 1772 private: | |
| 1773 CompilerCounters* _counters; | |
| 1774 | |
| 1775 ciEnv* _env; | |
| 1776 CompileLog* _log; | |
| 1777 CompileTask* _task; | |
| 1778 CompileQueue* _queue; | |
| 1584 | 1779 BufferBlob* _buffer_blob; |
| 0 | 1780 |
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1781 nmethod* _scanned_nmethod; // nmethod being scanned by the sweeper |
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1782 |
| 0 | 1783 public: |
| 1784 | |
| 1785 static CompilerThread* current(); | |
| 1786 | |
| 1787 CompilerThread(CompileQueue* queue, CompilerCounters* counters); | |
| 1788 | |
| 1789 bool is_Compiler_thread() const { return true; } | |
| 1790 // Hide this compiler thread from external view. | |
| 1791 bool is_hidden_from_external_view() const { return true; } | |
| 1792 | |
| 1793 CompileQueue* queue() { return _queue; } | |
| 1794 CompilerCounters* counters() { return _counters; } | |
| 1795 | |
| 1796 // Get/set the thread's compilation environment. | |
| 1797 ciEnv* env() { return _env; } | |
| 1798 void set_env(ciEnv* env) { _env = env; } | |
| 1799 | |
| 1584 | 1800 BufferBlob* get_buffer_blob() { return _buffer_blob; } |
| 1801 void set_buffer_blob(BufferBlob* b) { _buffer_blob = b; }; | |
| 1802 | |
| 0 | 1803 // Get/set the thread's logging information |
| 1804 CompileLog* log() { return _log; } | |
| 1805 void init_log(CompileLog* log) { | |
| 1806 // Set once, for good. | |
| 1807 assert(_log == NULL, "set only once"); | |
| 1808 _log = log; | |
| 1809 } | |
| 1810 | |
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1811 // GC support |
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1812 // Apply "f->do_oop" to all root oops in "this". |
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1813 // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames |
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1814 void oops_do(OopClosure* f, CodeBlobClosure* cf); |
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1815 |
| 0 | 1816 #ifndef PRODUCT |
| 1817 private: | |
| 1818 IdealGraphPrinter *_ideal_graph_printer; | |
| 1819 public: | |
| 1820 IdealGraphPrinter *ideal_graph_printer() { return _ideal_graph_printer; } | |
| 1821 void set_ideal_graph_printer(IdealGraphPrinter *n) { _ideal_graph_printer = n; } | |
| 1822 #endif | |
| 1823 | |
| 1824 // Get/set the thread's current task | |
| 1825 CompileTask* task() { return _task; } | |
| 1826 void set_task(CompileTask* task) { _task = task; } | |
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1827 |
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1828 // Track the nmethod currently being scanned by the sweeper |
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1829 void set_scanned_nmethod(nmethod* nm) { |
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1830 assert(_scanned_nmethod == NULL || nm == NULL, "should reset to NULL before writing a new value"); |
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1831 _scanned_nmethod = nm; |
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1832 } |
| 0 | 1833 }; |
| 1834 | |
| 1835 inline CompilerThread* CompilerThread::current() { | |
| 1836 return JavaThread::current()->as_CompilerThread(); | |
| 1837 } | |
| 1838 | |
| 1839 | |
| 1840 // The active thread queue. It also keeps track of the current used | |
| 1841 // thread priorities. | |
| 1842 class Threads: AllStatic { | |
| 1843 friend class VMStructs; | |
| 1844 private: | |
| 1845 static JavaThread* _thread_list; | |
| 1846 static int _number_of_threads; | |
| 1847 static int _number_of_non_daemon_threads; | |
| 1848 static int _return_code; | |
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1849 #ifdef ASSERT |
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1850 static bool _vm_complete; |
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1851 #endif |
| 0 | 1852 |
| 1853 public: | |
| 1854 // Thread management | |
| 1855 // force_daemon is a concession to JNI, where we may need to add a | |
| 1856 // thread to the thread list before allocating its thread object | |
| 1857 static void add(JavaThread* p, bool force_daemon = false); | |
| 1858 static void remove(JavaThread* p); | |
| 1859 static bool includes(JavaThread* p); | |
| 1860 static JavaThread* first() { return _thread_list; } | |
| 1861 static void threads_do(ThreadClosure* tc); | |
| 1862 | |
| 1863 // Initializes the vm and creates the vm thread | |
| 1864 static jint create_vm(JavaVMInitArgs* args, bool* canTryAgain); | |
| 1865 static void convert_vm_init_libraries_to_agents(); | |
| 1866 static void create_vm_init_libraries(); | |
| 1867 static void create_vm_init_agents(); | |
| 1868 static void shutdown_vm_agents(); | |
| 1869 static bool destroy_vm(); | |
| 1870 // Supported VM versions via JNI | |
| 1871 // Includes JNI_VERSION_1_1 | |
| 1872 static jboolean is_supported_jni_version_including_1_1(jint version); | |
| 1873 // Does not include JNI_VERSION_1_1 | |
| 1874 static jboolean is_supported_jni_version(jint version); | |
| 1875 | |
| 1876 // Garbage collection | |
| 1877 static void follow_other_roots(void f(oop*)); | |
| 1878 | |
| 1879 // Apply "f->do_oop" to all root oops in all threads. | |
| 1880 // This version may only be called by sequential code. | |
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1881 static void oops_do(OopClosure* f, CodeBlobClosure* cf); |
| 0 | 1882 // This version may be called by sequential or parallel code. |
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1883 static void possibly_parallel_oops_do(OopClosure* f, CodeBlobClosure* cf); |
| 0 | 1884 // This creates a list of GCTasks, one per thread. |
| 1885 static void create_thread_roots_tasks(GCTaskQueue* q); | |
| 1886 // This creates a list of GCTasks, one per thread, for marking objects. | |
| 1887 static void create_thread_roots_marking_tasks(GCTaskQueue* q); | |
| 1888 | |
| 1889 // Apply "f->do_oop" to roots in all threads that | |
| 1890 // are part of compiled frames | |
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1891 static void compiled_frame_oops_do(OopClosure* f, CodeBlobClosure* cf); |
| 0 | 1892 |
| 1893 static void convert_hcode_pointers(); | |
| 1894 static void restore_hcode_pointers(); | |
| 1895 | |
| 1896 // Sweeper | |
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1897 static void nmethods_do(CodeBlobClosure* cf); |
| 0 | 1898 |
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1899 // RedefineClasses support |
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1900 static void metadata_do(void f(Metadata*)); |
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1901 |
| 0 | 1902 static void gc_epilogue(); |
| 1903 static void gc_prologue(); | |
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1904 #ifdef ASSERT |
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1905 static bool is_vm_complete() { return _vm_complete; } |
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1906 #endif |
| 0 | 1907 |
| 1908 // Verification | |
| 1909 static void verify(); | |
| 1910 static void print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks); | |
| 1911 static void print(bool print_stacks, bool internal_format) { | |
| 1912 // this function is only used by debug.cpp | |
| 1913 print_on(tty, print_stacks, internal_format, false /* no concurrent lock printed */); | |
| 1914 } | |
| 1915 static void print_on_error(outputStream* st, Thread* current, char* buf, int buflen); | |
| 1916 | |
| 1917 // Get Java threads that are waiting to enter a monitor. If doLock | |
| 1918 // is true, then Threads_lock is grabbed as needed. Otherwise, the | |
| 1919 // VM needs to be at a safepoint. | |
| 1920 static GrowableArray<JavaThread*>* get_pending_threads(int count, | |
| 1921 address monitor, bool doLock); | |
| 1922 | |
| 1923 // Get owning Java thread from the monitor's owner field. If doLock | |
| 1924 // is true, then Threads_lock is grabbed as needed. Otherwise, the | |
| 1925 // VM needs to be at a safepoint. | |
| 1926 static JavaThread *owning_thread_from_monitor_owner(address owner, | |
| 1927 bool doLock); | |
| 1928 | |
| 1929 // Number of threads on the active threads list | |
| 1930 static int number_of_threads() { return _number_of_threads; } | |
| 1931 // Number of non-daemon threads on the active threads list | |
| 1932 static int number_of_non_daemon_threads() { return _number_of_non_daemon_threads; } | |
| 1933 | |
| 1934 // Deoptimizes all frames tied to marked nmethods | |
| 1935 static void deoptimized_wrt_marked_nmethods(); | |
| 1936 | |
| 1937 }; | |
| 1938 | |
| 1939 | |
| 1940 // Thread iterator | |
| 1941 class ThreadClosure: public StackObj { | |
| 1942 public: | |
| 1943 virtual void do_thread(Thread* thread) = 0; | |
| 1944 }; | |
| 1945 | |
| 1946 class SignalHandlerMark: public StackObj { | |
| 1947 private: | |
| 1948 Thread* _thread; | |
| 1949 public: | |
| 1950 SignalHandlerMark(Thread* t) { | |
| 1951 _thread = t; | |
| 1952 if (_thread) _thread->enter_signal_handler(); | |
| 1953 } | |
| 1954 ~SignalHandlerMark() { | |
| 1955 if (_thread) _thread->leave_signal_handler(); | |
| 1956 _thread = NULL; | |
| 1957 } | |
| 1958 }; | |
| 1959 | |
| 1972 | 1960 |
| 1961 #endif // SHARE_VM_RUNTIME_THREAD_HPP |