Mercurial > hg > truffle
annotate src/share/vm/runtime/thread.hpp @ 9126:bc26f978b0ce
HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly
don't use the (wrong) cached value, but ask the runtime on each request.
Fixes regression on xml.* benchmarks @ specjvm2008. The problem was:
After the constructor of Object was deoptimized due to an assumption violation,
it was recompiled again after some time. However, on recompilation, the value
of hasFinalizeSubclass for the class was not updated and it was compiled again
with a, now wrong, assumption, which then triggers deoptimization again.
This was repeated until it hit the recompilation limit (defined by
PerMethodRecompilationCutoff), and therefore only executed by the interpreter
from now on, causing the performance regression.
| author | Bernhard Urban <bernhard.urban@jku.at> |
|---|---|
| date | Mon, 15 Apr 2013 19:54:58 +0200 |
| parents | b9a918201d47 |
| children | 836a62f43af9 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_THREAD_HPP |
| 26 #define SHARE_VM_RUNTIME_THREAD_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "memory/threadLocalAllocBuffer.hpp" | |
| 30 #include "oops/oop.hpp" | |
| 31 #include "prims/jni.h" | |
| 32 #include "prims/jvmtiExport.hpp" | |
| 33 #include "runtime/frame.hpp" | |
| 34 #include "runtime/javaFrameAnchor.hpp" | |
| 35 #include "runtime/jniHandles.hpp" | |
| 36 #include "runtime/mutexLocker.hpp" | |
| 37 #include "runtime/os.hpp" | |
| 38 #include "runtime/osThread.hpp" | |
| 39 #include "runtime/park.hpp" | |
| 40 #include "runtime/safepoint.hpp" | |
| 41 #include "runtime/stubRoutines.hpp" | |
| 42 #include "runtime/threadLocalStorage.hpp" | |
| 43 #include "runtime/unhandledOops.hpp" | |
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44 #include "utilities/macros.hpp" |
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45 |
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46 #if INCLUDE_NMT |
| 6197 | 47 #include "services/memRecorder.hpp" |
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48 #endif // INCLUDE_NMT |
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49 |
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50 #include "trace/tracing.hpp" |
| 1972 | 51 #include "utilities/exceptions.hpp" |
| 52 #include "utilities/top.hpp" | |
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53 #if INCLUDE_ALL_GCS |
| 1972 | 54 #include "gc_implementation/g1/dirtyCardQueue.hpp" |
| 55 #include "gc_implementation/g1/satbQueue.hpp" | |
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56 #endif // INCLUDE_ALL_GCS |
| 1972 | 57 #ifdef ZERO |
| 58 #ifdef TARGET_ARCH_zero | |
| 59 # include "stack_zero.hpp" | |
| 60 #endif | |
| 61 #endif | |
| 62 | |
| 0 | 63 class ThreadSafepointState; |
| 64 class ThreadProfiler; | |
| 65 | |
| 66 class JvmtiThreadState; | |
| 67 class JvmtiGetLoadedClassesClosure; | |
| 68 class ThreadStatistics; | |
| 69 class ConcurrentLocksDump; | |
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70 class ParkEvent; |
| 1878 | 71 class Parker; |
| 0 | 72 |
| 73 class ciEnv; | |
| 74 class CompileThread; | |
| 75 class CompileLog; | |
| 76 class CompileTask; | |
| 77 class CompileQueue; | |
| 78 class CompilerCounters; | |
| 79 class vframeArray; | |
| 80 | |
| 81 class DeoptResourceMark; | |
| 82 class jvmtiDeferredLocalVariableSet; | |
| 83 | |
| 84 class GCTaskQueue; | |
| 85 class ThreadClosure; | |
| 86 class IdealGraphPrinter; | |
| 87 | |
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88 class WorkerThread; |
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89 |
| 0 | 90 // Class hierarchy |
| 91 // - Thread | |
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92 // - NamedThread |
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93 // - VMThread |
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94 // - ConcurrentGCThread |
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95 // - WorkerThread |
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96 // - GangWorker |
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97 // - GCTaskThread |
| 0 | 98 // - JavaThread |
| 99 // - WatcherThread | |
| 100 | |
| 101 class Thread: public ThreadShadow { | |
| 102 friend class VMStructs; | |
| 103 private: | |
| 104 // Exception handling | |
| 105 // (Note: _pending_exception and friends are in ThreadShadow) | |
| 106 //oop _pending_exception; // pending exception for current thread | |
| 107 // const char* _exception_file; // file information for exception (debugging only) | |
| 108 // int _exception_line; // line information for exception (debugging only) | |
| 6197 | 109 protected: |
| 0 | 110 // Support for forcing alignment of thread objects for biased locking |
| 111 void* _real_malloc_address; | |
| 112 public: | |
| 6197 | 113 void* operator new(size_t size) { return allocate(size, true); } |
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114 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) { return allocate(size, false); } |
| 0 | 115 void operator delete(void* p); |
| 6197 | 116 |
| 117 protected: | |
| 118 static void* allocate(size_t size, bool throw_excpt, MEMFLAGS flags = mtThread); | |
| 0 | 119 private: |
| 120 | |
| 121 // *************************************************************** | |
| 122 // Suspend and resume support | |
| 123 // *************************************************************** | |
| 124 // | |
| 125 // VM suspend/resume no longer exists - it was once used for various | |
| 126 // things including safepoints but was deprecated and finally removed | |
| 127 // in Java 7. Because VM suspension was considered "internal" Java-level | |
| 128 // suspension was considered "external", and this legacy naming scheme | |
| 129 // remains. | |
| 130 // | |
| 131 // External suspend/resume requests come from JVM_SuspendThread, | |
| 132 // JVM_ResumeThread, JVMTI SuspendThread, and finally JVMTI | |
| 133 // ResumeThread. External | |
| 134 // suspend requests cause _external_suspend to be set and external | |
| 135 // resume requests cause _external_suspend to be cleared. | |
| 136 // External suspend requests do not nest on top of other external | |
| 137 // suspend requests. The higher level APIs reject suspend requests | |
| 138 // for already suspended threads. | |
| 139 // | |
| 140 // The external_suspend | |
| 141 // flag is checked by has_special_runtime_exit_condition() and java thread | |
| 142 // will self-suspend when handle_special_runtime_exit_condition() is | |
| 143 // called. Most uses of the _thread_blocked state in JavaThreads are | |
| 144 // considered the same as being externally suspended; if the blocking | |
| 145 // condition lifts, the JavaThread will self-suspend. Other places | |
| 146 // where VM checks for external_suspend include: | |
| 147 // + mutex granting (do not enter monitors when thread is suspended) | |
| 148 // + state transitions from _thread_in_native | |
| 149 // | |
| 150 // In general, java_suspend() does not wait for an external suspend | |
| 151 // request to complete. When it returns, the only guarantee is that | |
| 152 // the _external_suspend field is true. | |
| 153 // | |
| 154 // wait_for_ext_suspend_completion() is used to wait for an external | |
| 155 // suspend request to complete. External suspend requests are usually | |
| 156 // followed by some other interface call that requires the thread to | |
| 157 // be quiescent, e.g., GetCallTrace(). By moving the "wait time" into | |
| 158 // the interface that requires quiescence, we give the JavaThread a | |
| 159 // chance to self-suspend before we need it to be quiescent. This | |
| 160 // improves overall suspend/query performance. | |
| 161 // | |
| 162 // _suspend_flags controls the behavior of java_ suspend/resume. | |
| 163 // It must be set under the protection of SR_lock. Read from the flag is | |
| 164 // OK without SR_lock as long as the value is only used as a hint. | |
| 165 // (e.g., check _external_suspend first without lock and then recheck | |
| 166 // inside SR_lock and finish the suspension) | |
| 167 // | |
| 168 // _suspend_flags is also overloaded for other "special conditions" so | |
| 169 // that a single check indicates whether any special action is needed | |
| 170 // eg. for async exceptions. | |
| 171 // ------------------------------------------------------------------- | |
| 172 // Notes: | |
| 173 // 1. The suspend/resume logic no longer uses ThreadState in OSThread | |
| 174 // but we still update its value to keep other part of the system (mainly | |
| 175 // JVMTI) happy. ThreadState is legacy code (see notes in | |
| 176 // osThread.hpp). | |
| 177 // | |
| 178 // 2. It would be more natural if set_external_suspend() is private and | |
| 179 // part of java_suspend(), but that probably would affect the suspend/query | |
| 180 // performance. Need more investigation on this. | |
| 181 // | |
| 182 | |
| 183 // suspend/resume lock: used for self-suspend | |
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184 Monitor* _SR_lock; |
| 0 | 185 |
| 186 protected: | |
| 187 enum SuspendFlags { | |
| 188 // NOTE: avoid using the sign-bit as cc generates different test code | |
| 189 // when the sign-bit is used, and sometimes incorrectly - see CR 6398077 | |
| 190 | |
| 191 _external_suspend = 0x20000000U, // thread is asked to self suspend | |
| 192 _ext_suspended = 0x40000000U, // thread has self-suspended | |
| 193 _deopt_suspend = 0x10000000U, // thread needs to self suspend for deopt | |
| 194 | |
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195 _has_async_exception = 0x00000001U, // there is a pending async exception |
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196 _critical_native_unlock = 0x00000002U // Must call back to unlock JNI critical lock |
| 0 | 197 }; |
| 198 | |
| 199 // various suspension related flags - atomically updated | |
| 200 // overloaded for async exception checking in check_special_condition_for_native_trans. | |
| 201 volatile uint32_t _suspend_flags; | |
| 202 | |
| 203 private: | |
| 204 int _num_nested_signal; | |
| 205 | |
| 206 public: | |
| 207 void enter_signal_handler() { _num_nested_signal++; } | |
| 208 void leave_signal_handler() { _num_nested_signal--; } | |
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209 bool is_inside_signal_handler() const { return _num_nested_signal > 0; } |
| 0 | 210 |
| 211 private: | |
| 212 // Debug tracing | |
| 213 static void trace(const char* msg, const Thread* const thread) PRODUCT_RETURN; | |
| 214 | |
| 215 // Active_handles points to a block of handles | |
| 216 JNIHandleBlock* _active_handles; | |
| 217 | |
| 218 // One-element thread local free list | |
| 219 JNIHandleBlock* _free_handle_block; | |
| 220 | |
| 221 // Point to the last handle mark | |
| 222 HandleMark* _last_handle_mark; | |
| 223 | |
| 224 // The parity of the last strong_roots iteration in which this thread was | |
| 225 // claimed as a task. | |
| 226 jint _oops_do_parity; | |
| 227 | |
| 228 public: | |
| 229 void set_last_handle_mark(HandleMark* mark) { _last_handle_mark = mark; } | |
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230 HandleMark* last_handle_mark() const { return _last_handle_mark; } |
| 0 | 231 private: |
| 232 | |
| 233 // debug support for checking if code does allow safepoints or not | |
| 234 // GC points in the VM can happen because of allocation, invoking a VM operation, or blocking on | |
| 235 // mutex, or blocking on an object synchronizer (Java locking). | |
| 236 // If !allow_safepoint(), then an assertion failure will happen in any of the above cases | |
| 237 // If !allow_allocation(), then an assertion failure will happen during allocation | |
| 238 // (Hence, !allow_safepoint() => !allow_allocation()). | |
| 239 // | |
| 240 // The two classes No_Safepoint_Verifier and No_Allocation_Verifier are used to set these counters. | |
| 241 // | |
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242 NOT_PRODUCT(int _allow_safepoint_count;) // If 0, thread allow a safepoint to happen |
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243 debug_only (int _allow_allocation_count;) // If 0, the thread is allowed to allocate oops. |
| 0 | 244 |
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245 // Used by SkipGCALot class. |
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246 NOT_PRODUCT(bool _skip_gcalot;) // Should we elide gc-a-lot? |
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247 |
| 0 | 248 // Record when GC is locked out via the GC_locker mechanism |
| 249 CHECK_UNHANDLED_OOPS_ONLY(int _gc_locked_out_count;) | |
| 250 | |
| 251 friend class No_Alloc_Verifier; | |
| 252 friend class No_Safepoint_Verifier; | |
| 253 friend class Pause_No_Safepoint_Verifier; | |
| 254 friend class ThreadLocalStorage; | |
| 255 friend class GC_locker; | |
| 256 | |
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257 ThreadLocalAllocBuffer _tlab; // Thread-local eden |
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258 jlong _allocated_bytes; // Cumulative number of bytes allocated on |
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259 // the Java heap |
| 0 | 260 |
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261 TRACE_BUFFER _trace_buffer; // Thread-local buffer for tracing |
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262 |
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263 int _vm_operation_started_count; // VM_Operation support |
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264 int _vm_operation_completed_count; // VM_Operation support |
| 0 | 265 |
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266 ObjectMonitor* _current_pending_monitor; // ObjectMonitor this thread |
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267 // is waiting to lock |
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268 bool _current_pending_monitor_is_from_java; // locking is from Java code |
| 0 | 269 |
| 270 // ObjectMonitor on which this thread called Object.wait() | |
| 271 ObjectMonitor* _current_waiting_monitor; | |
| 272 | |
| 273 // Private thread-local objectmonitor list - a simple cache organized as a SLL. | |
| 274 public: | |
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275 ObjectMonitor* omFreeList; |
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276 int omFreeCount; // length of omFreeList |
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277 int omFreeProvision; // reload chunk size |
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278 ObjectMonitor* omInUseList; // SLL to track monitors in circulation |
| 1587 | 279 int omInUseCount; // length of omInUseList |
| 0 | 280 |
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281 #ifdef ASSERT |
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282 private: |
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283 bool _visited_for_critical_count; |
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284 |
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285 public: |
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286 void set_visited_for_critical_count(bool z) { _visited_for_critical_count = z; } |
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287 bool was_visited_for_critical_count() const { return _visited_for_critical_count; } |
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288 #endif |
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289 |
| 0 | 290 public: |
| 291 enum { | |
| 292 is_definitely_current_thread = true | |
| 293 }; | |
| 294 | |
| 295 // Constructor | |
| 296 Thread(); | |
| 297 virtual ~Thread(); | |
| 298 | |
| 299 // initializtion | |
| 300 void initialize_thread_local_storage(); | |
| 301 | |
| 302 // thread entry point | |
| 303 virtual void run(); | |
| 304 | |
| 305 // Testers | |
| 306 virtual bool is_VM_thread() const { return false; } | |
| 307 virtual bool is_Java_thread() const { return false; } | |
| 308 virtual bool is_Compiler_thread() const { return false; } | |
| 309 virtual bool is_hidden_from_external_view() const { return false; } | |
| 310 virtual bool is_jvmti_agent_thread() const { return false; } | |
| 311 // True iff the thread can perform GC operations at a safepoint. | |
| 312 // Generally will be true only of VM thread and parallel GC WorkGang | |
| 313 // threads. | |
| 314 virtual bool is_GC_task_thread() const { return false; } | |
| 315 virtual bool is_Watcher_thread() const { return false; } | |
| 316 virtual bool is_ConcurrentGC_thread() const { return false; } | |
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317 virtual bool is_Named_thread() const { return false; } |
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318 virtual bool is_Worker_thread() const { return false; } |
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319 |
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320 // Casts |
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321 virtual WorkerThread* as_Worker_thread() const { return NULL; } |
| 0 | 322 |
| 323 virtual char* name() const { return (char*)"Unknown thread"; } | |
| 324 | |
| 325 // Returns the current thread | |
| 326 static inline Thread* current(); | |
| 327 | |
| 328 // Common thread operations | |
| 329 static void set_priority(Thread* thread, ThreadPriority priority); | |
| 330 static ThreadPriority get_priority(const Thread* const thread); | |
| 331 static void start(Thread* thread); | |
| 332 static void interrupt(Thread* thr); | |
| 333 static bool is_interrupted(Thread* thr, bool clear_interrupted); | |
| 334 | |
| 4006 | 335 void set_native_thread_name(const char *name) { |
| 336 assert(Thread::current() == this, "set_native_thread_name can only be called on the current thread"); | |
| 337 os::set_native_thread_name(name); | |
| 338 } | |
| 339 | |
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340 ObjectMonitor** omInUseList_addr() { return (ObjectMonitor **)&omInUseList; } |
| 0 | 341 Monitor* SR_lock() const { return _SR_lock; } |
| 342 | |
| 343 bool has_async_exception() const { return (_suspend_flags & _has_async_exception) != 0; } | |
| 344 | |
| 345 void set_suspend_flag(SuspendFlags f) { | |
| 346 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); | |
| 347 uint32_t flags; | |
| 348 do { | |
| 349 flags = _suspend_flags; | |
| 350 } | |
| 351 while (Atomic::cmpxchg((jint)(flags | f), | |
| 352 (volatile jint*)&_suspend_flags, | |
| 353 (jint)flags) != (jint)flags); | |
| 354 } | |
| 355 void clear_suspend_flag(SuspendFlags f) { | |
| 356 assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); | |
| 357 uint32_t flags; | |
| 358 do { | |
| 359 flags = _suspend_flags; | |
| 360 } | |
| 361 while (Atomic::cmpxchg((jint)(flags & ~f), | |
| 362 (volatile jint*)&_suspend_flags, | |
| 363 (jint)flags) != (jint)flags); | |
| 364 } | |
| 365 | |
| 366 void set_has_async_exception() { | |
| 367 set_suspend_flag(_has_async_exception); | |
| 368 } | |
| 369 void clear_has_async_exception() { | |
| 370 clear_suspend_flag(_has_async_exception); | |
| 371 } | |
| 372 | |
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373 bool do_critical_native_unlock() const { return (_suspend_flags & _critical_native_unlock) != 0; } |
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374 |
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375 void set_critical_native_unlock() { |
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376 set_suspend_flag(_critical_native_unlock); |
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377 } |
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378 void clear_critical_native_unlock() { |
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379 clear_suspend_flag(_critical_native_unlock); |
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380 } |
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381 |
| 0 | 382 // Support for Unhandled Oop detection |
| 383 #ifdef CHECK_UNHANDLED_OOPS | |
| 384 private: | |
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385 UnhandledOops* _unhandled_oops; |
| 0 | 386 public: |
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387 UnhandledOops* unhandled_oops() { return _unhandled_oops; } |
| 0 | 388 // Mark oop safe for gc. It may be stack allocated but won't move. |
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389 void allow_unhandled_oop(oop *op) { |
| 0 | 390 if (CheckUnhandledOops) unhandled_oops()->allow_unhandled_oop(op); |
| 391 } | |
| 392 // Clear oops at safepoint so crashes point to unhandled oop violator | |
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393 void clear_unhandled_oops() { |
| 0 | 394 if (CheckUnhandledOops) unhandled_oops()->clear_unhandled_oops(); |
| 395 } | |
| 396 bool is_gc_locked_out() { return _gc_locked_out_count > 0; } | |
| 397 #endif // CHECK_UNHANDLED_OOPS | |
| 398 | |
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399 #ifndef PRODUCT |
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400 bool skip_gcalot() { return _skip_gcalot; } |
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401 void set_skip_gcalot(bool v) { _skip_gcalot = v; } |
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402 #endif |
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403 |
| 0 | 404 public: |
| 405 // Installs a pending exception to be inserted later | |
| 406 static void send_async_exception(oop thread_oop, oop java_throwable); | |
| 407 | |
| 408 // Resource area | |
| 409 ResourceArea* resource_area() const { return _resource_area; } | |
| 410 void set_resource_area(ResourceArea* area) { _resource_area = area; } | |
| 411 | |
| 412 OSThread* osthread() const { return _osthread; } | |
| 413 void set_osthread(OSThread* thread) { _osthread = thread; } | |
| 414 | |
| 415 // JNI handle support | |
| 416 JNIHandleBlock* active_handles() const { return _active_handles; } | |
| 417 void set_active_handles(JNIHandleBlock* block) { _active_handles = block; } | |
| 418 JNIHandleBlock* free_handle_block() const { return _free_handle_block; } | |
| 419 void set_free_handle_block(JNIHandleBlock* block) { _free_handle_block = block; } | |
| 420 | |
| 421 // Internal handle support | |
| 422 HandleArea* handle_area() const { return _handle_area; } | |
| 423 void set_handle_area(HandleArea* area) { _handle_area = area; } | |
| 424 | |
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425 GrowableArray<Metadata*>* metadata_handles() const { return _metadata_handles; } |
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426 void set_metadata_handles(GrowableArray<Metadata*>* handles){ _metadata_handles = handles; } |
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427 |
| 0 | 428 // Thread-Local Allocation Buffer (TLAB) support |
| 429 ThreadLocalAllocBuffer& tlab() { return _tlab; } | |
| 430 void initialize_tlab() { | |
| 431 if (UseTLAB) { | |
| 432 tlab().initialize(); | |
| 433 } | |
| 434 } | |
| 435 | |
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436 jlong allocated_bytes() { return _allocated_bytes; } |
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437 void set_allocated_bytes(jlong value) { _allocated_bytes = value; } |
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438 void incr_allocated_bytes(jlong size) { _allocated_bytes += size; } |
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439 jlong cooked_allocated_bytes() { |
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440 jlong allocated_bytes = OrderAccess::load_acquire(&_allocated_bytes); |
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441 if (UseTLAB) { |
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442 size_t used_bytes = tlab().used_bytes(); |
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443 if ((ssize_t)used_bytes > 0) { |
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444 // More-or-less valid tlab. The load_acquire above should ensure |
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445 // that the result of the add is <= the instantaneous value |
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446 return allocated_bytes + used_bytes; |
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447 } |
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448 } |
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449 return allocated_bytes; |
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450 } |
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451 |
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452 TRACE_BUFFER trace_buffer() { return _trace_buffer; } |
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453 void set_trace_buffer(TRACE_BUFFER buf) { _trace_buffer = buf; } |
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454 |
| 0 | 455 // VM operation support |
| 456 int vm_operation_ticket() { return ++_vm_operation_started_count; } | |
| 457 int vm_operation_completed_count() { return _vm_operation_completed_count; } | |
| 458 void increment_vm_operation_completed_count() { _vm_operation_completed_count++; } | |
| 459 | |
| 460 // For tracking the heavyweight monitor the thread is pending on. | |
| 461 ObjectMonitor* current_pending_monitor() { | |
| 462 return _current_pending_monitor; | |
| 463 } | |
| 464 void set_current_pending_monitor(ObjectMonitor* monitor) { | |
| 465 _current_pending_monitor = monitor; | |
| 466 } | |
| 467 void set_current_pending_monitor_is_from_java(bool from_java) { | |
| 468 _current_pending_monitor_is_from_java = from_java; | |
| 469 } | |
| 470 bool current_pending_monitor_is_from_java() { | |
| 471 return _current_pending_monitor_is_from_java; | |
| 472 } | |
| 473 | |
| 474 // For tracking the ObjectMonitor on which this thread called Object.wait() | |
| 475 ObjectMonitor* current_waiting_monitor() { | |
| 476 return _current_waiting_monitor; | |
| 477 } | |
| 478 void set_current_waiting_monitor(ObjectMonitor* monitor) { | |
| 479 _current_waiting_monitor = monitor; | |
| 480 } | |
| 481 | |
| 482 // GC support | |
| 483 // Apply "f->do_oop" to all root oops in "this". | |
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484 // Apply "cld_f->do_cld" to CLDs that are otherwise not kept alive. |
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485 // Used by JavaThread::oops_do. |
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486 // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames |
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487 virtual void oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf); |
| 0 | 488 |
| 489 // Handles the parallel case for the method below. | |
| 490 private: | |
| 491 bool claim_oops_do_par_case(int collection_parity); | |
| 492 public: | |
| 493 // Requires that "collection_parity" is that of the current strong roots | |
| 494 // iteration. If "is_par" is false, sets the parity of "this" to | |
| 495 // "collection_parity", and returns "true". If "is_par" is true, | |
| 496 // uses an atomic instruction to set the current threads parity to | |
| 497 // "collection_parity", if it is not already. Returns "true" iff the | |
| 498 // calling thread does the update, this indicates that the calling thread | |
| 499 // has claimed the thread's stack as a root groop in the current | |
| 500 // collection. | |
| 501 bool claim_oops_do(bool is_par, int collection_parity) { | |
| 502 if (!is_par) { | |
| 503 _oops_do_parity = collection_parity; | |
| 504 return true; | |
| 505 } else { | |
| 506 return claim_oops_do_par_case(collection_parity); | |
| 507 } | |
| 508 } | |
| 509 | |
| 510 // Sweeper support | |
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511 void nmethods_do(CodeBlobClosure* cf); |
| 0 | 512 |
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513 // jvmtiRedefineClasses support |
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514 void metadata_do(void f(Metadata*)); |
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515 |
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516 // Used by fast lock support |
| 0 | 517 virtual bool is_lock_owned(address adr) const; |
| 518 | |
| 519 // Check if address is in the stack of the thread (not just for locks). | |
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520 // Warning: the method can only be used on the running thread |
| 0 | 521 bool is_in_stack(address adr) const; |
| 522 | |
| 523 // Sets this thread as starting thread. Returns failure if thread | |
| 524 // creation fails due to lack of memory, too many threads etc. | |
| 525 bool set_as_starting_thread(); | |
| 526 | |
| 527 protected: | |
| 528 // OS data associated with the thread | |
| 529 OSThread* _osthread; // Platform-specific thread information | |
| 530 | |
| 531 // Thread local resource area for temporary allocation within the VM | |
| 532 ResourceArea* _resource_area; | |
| 533 | |
| 534 // Thread local handle area for allocation of handles within the VM | |
| 535 HandleArea* _handle_area; | |
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536 GrowableArray<Metadata*>* _metadata_handles; |
| 0 | 537 |
| 538 // Support for stack overflow handling, get_thread, etc. | |
| 539 address _stack_base; | |
| 540 size_t _stack_size; | |
| 541 uintptr_t _self_raw_id; // used by get_thread (mutable) | |
| 542 int _lgrp_id; | |
| 543 | |
| 544 public: | |
| 545 // Stack overflow support | |
| 546 address stack_base() const { assert(_stack_base != NULL,"Sanity check"); return _stack_base; } | |
| 547 | |
| 548 void set_stack_base(address base) { _stack_base = base; } | |
| 549 size_t stack_size() const { return _stack_size; } | |
| 550 void set_stack_size(size_t size) { _stack_size = size; } | |
| 551 void record_stack_base_and_size(); | |
| 552 | |
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553 bool on_local_stack(address adr) const { |
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554 /* QQQ this has knowledge of direction, ought to be a stack method */ |
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555 return (_stack_base >= adr && adr >= (_stack_base - _stack_size)); |
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556 } |
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557 |
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558 uintptr_t self_raw_id() { return _self_raw_id; } |
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559 void set_self_raw_id(uintptr_t value) { _self_raw_id = value; } |
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560 |
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561 int lgrp_id() const { return _lgrp_id; } |
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562 void set_lgrp_id(int value) { _lgrp_id = value; } |
| 0 | 563 |
| 564 // Printing | |
| 565 void print_on(outputStream* st) const; | |
| 566 void print() const { print_on(tty); } | |
| 567 virtual void print_on_error(outputStream* st, char* buf, int buflen) const; | |
| 568 | |
| 569 // Debug-only code | |
| 570 #ifdef ASSERT | |
| 571 private: | |
| 572 // Deadlock detection support for Mutex locks. List of locks own by thread. | |
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573 Monitor* _owned_locks; |
| 0 | 574 // Mutex::set_owner_implementation is the only place where _owned_locks is modified, |
| 575 // thus the friendship | |
| 576 friend class Mutex; | |
| 577 friend class Monitor; | |
| 578 | |
| 579 public: | |
| 580 void print_owned_locks_on(outputStream* st) const; | |
| 581 void print_owned_locks() const { print_owned_locks_on(tty); } | |
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582 Monitor* owned_locks() const { return _owned_locks; } |
| 0 | 583 bool owns_locks() const { return owned_locks() != NULL; } |
| 584 bool owns_locks_but_compiled_lock() const; | |
| 585 | |
| 586 // Deadlock detection | |
| 587 bool allow_allocation() { return _allow_allocation_count == 0; } | |
| 588 #endif | |
| 589 | |
| 590 void check_for_valid_safepoint_state(bool potential_vm_operation) PRODUCT_RETURN; | |
| 591 | |
| 592 private: | |
| 593 volatile int _jvmti_env_iteration_count; | |
| 594 | |
| 595 public: | |
| 596 void entering_jvmti_env_iteration() { ++_jvmti_env_iteration_count; } | |
| 597 void leaving_jvmti_env_iteration() { --_jvmti_env_iteration_count; } | |
| 598 bool is_inside_jvmti_env_iteration() { return _jvmti_env_iteration_count > 0; } | |
| 599 | |
| 600 // Code generation | |
| 601 static ByteSize exception_file_offset() { return byte_offset_of(Thread, _exception_file ); } | |
| 602 static ByteSize exception_line_offset() { return byte_offset_of(Thread, _exception_line ); } | |
| 603 static ByteSize active_handles_offset() { return byte_offset_of(Thread, _active_handles ); } | |
| 604 | |
| 605 static ByteSize stack_base_offset() { return byte_offset_of(Thread, _stack_base ); } | |
| 606 static ByteSize stack_size_offset() { return byte_offset_of(Thread, _stack_size ); } | |
| 607 | |
| 608 #define TLAB_FIELD_OFFSET(name) \ | |
|
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609 static ByteSize tlab_##name##_offset() { return byte_offset_of(Thread, _tlab) + ThreadLocalAllocBuffer::name##_offset(); } |
| 0 | 610 |
| 611 TLAB_FIELD_OFFSET(start) | |
| 612 TLAB_FIELD_OFFSET(end) | |
| 613 TLAB_FIELD_OFFSET(top) | |
| 614 TLAB_FIELD_OFFSET(pf_top) | |
| 615 TLAB_FIELD_OFFSET(size) // desired_size | |
| 616 TLAB_FIELD_OFFSET(refill_waste_limit) | |
| 617 TLAB_FIELD_OFFSET(number_of_refills) | |
| 618 TLAB_FIELD_OFFSET(fast_refill_waste) | |
| 619 TLAB_FIELD_OFFSET(slow_allocations) | |
| 620 | |
| 621 #undef TLAB_FIELD_OFFSET | |
| 622 | |
|
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|
623 static ByteSize allocated_bytes_offset() { return byte_offset_of(Thread, _allocated_bytes ); } |
|
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|
624 |
| 0 | 625 public: |
| 626 volatile intptr_t _Stalled ; | |
| 627 volatile int _TypeTag ; | |
| 628 ParkEvent * _ParkEvent ; // for synchronized() | |
| 629 ParkEvent * _SleepEvent ; // for Thread.sleep | |
| 630 ParkEvent * _MutexEvent ; // for native internal Mutex/Monitor | |
| 631 ParkEvent * _MuxEvent ; // for low-level muxAcquire-muxRelease | |
| 632 int NativeSyncRecursion ; // diagnostic | |
| 633 | |
| 634 volatile int _OnTrap ; // Resume-at IP delta | |
| 635 jint _hashStateW ; // Marsaglia Shift-XOR thread-local RNG | |
| 636 jint _hashStateX ; // thread-specific hashCode generator state | |
| 637 jint _hashStateY ; | |
| 638 jint _hashStateZ ; | |
| 639 void * _schedctl ; | |
| 640 | |
| 641 intptr_t _ScratchA, _ScratchB ; // Scratch locations for fast-path sync code | |
| 642 static ByteSize ScratchA_offset() { return byte_offset_of(Thread, _ScratchA ); } | |
| 643 static ByteSize ScratchB_offset() { return byte_offset_of(Thread, _ScratchB ); } | |
| 644 | |
| 645 volatile jint rng [4] ; // RNG for spin loop | |
| 646 | |
| 647 // Low-level leaf-lock primitives used to implement synchronization | |
| 648 // and native monitor-mutex infrastructure. | |
| 649 // Not for general synchronization use. | |
| 650 static void SpinAcquire (volatile int * Lock, const char * Name) ; | |
| 651 static void SpinRelease (volatile int * Lock) ; | |
| 652 static void muxAcquire (volatile intptr_t * Lock, const char * Name) ; | |
| 653 static void muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) ; | |
| 654 static void muxRelease (volatile intptr_t * Lock) ; | |
| 655 }; | |
| 656 | |
| 657 // Inline implementation of Thread::current() | |
| 658 // Thread::current is "hot" it's called > 128K times in the 1st 500 msecs of | |
| 659 // startup. | |
| 660 // ThreadLocalStorage::thread is warm -- it's called > 16K times in the same | |
| 661 // period. This is inlined in thread_<os_family>.inline.hpp. | |
| 662 | |
| 663 inline Thread* Thread::current() { | |
| 664 #ifdef ASSERT | |
| 665 // This function is very high traffic. Define PARANOID to enable expensive | |
| 666 // asserts. | |
| 667 #ifdef PARANOID | |
| 668 // Signal handler should call ThreadLocalStorage::get_thread_slow() | |
| 669 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 670 assert(t != NULL && !t->is_inside_signal_handler(), | |
| 671 "Don't use Thread::current() inside signal handler"); | |
| 672 #endif | |
| 673 #endif | |
| 674 Thread* thread = ThreadLocalStorage::thread(); | |
| 675 assert(thread != NULL, "just checking"); | |
| 676 return thread; | |
| 677 } | |
| 678 | |
| 679 // Name support for threads. non-JavaThread subclasses with multiple | |
| 680 // uniquely named instances should derive from this. | |
| 681 class NamedThread: public Thread { | |
| 682 friend class VMStructs; | |
| 683 enum { | |
| 684 max_name_len = 64 | |
| 685 }; | |
| 686 private: | |
| 687 char* _name; | |
|
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688 // log JavaThread being processed by oops_do |
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689 JavaThread* _processed_thread; |
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690 |
| 0 | 691 public: |
| 692 NamedThread(); | |
| 693 ~NamedThread(); | |
| 694 // May only be called once per thread. | |
| 695 void set_name(const char* format, ...); | |
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696 virtual bool is_Named_thread() const { return true; } |
| 0 | 697 virtual char* name() const { return _name == NULL ? (char*)"Unknown Thread" : _name; } |
|
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698 JavaThread *processed_thread() { return _processed_thread; } |
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699 void set_processed_thread(JavaThread *thread) { _processed_thread = thread; } |
| 0 | 700 }; |
| 701 | |
| 702 // Worker threads are named and have an id of an assigned work. | |
| 703 class WorkerThread: public NamedThread { | |
| 704 private: | |
| 705 uint _id; | |
| 706 public: | |
|
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707 WorkerThread() : _id(0) { } |
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|
708 virtual bool is_Worker_thread() const { return true; } |
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709 |
|
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|
710 virtual WorkerThread* as_Worker_thread() const { |
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711 assert(is_Worker_thread(), "Dubious cast to WorkerThread*?"); |
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712 return (WorkerThread*) this; |
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713 } |
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|
714 |
|
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|
715 void set_id(uint work_id) { _id = work_id; } |
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|
716 uint id() const { return _id; } |
| 0 | 717 }; |
| 718 | |
| 719 // A single WatcherThread is used for simulating timer interrupts. | |
| 720 class WatcherThread: public Thread { | |
| 721 friend class VMStructs; | |
| 722 public: | |
| 723 virtual void run(); | |
| 724 | |
| 725 private: | |
| 726 static WatcherThread* _watcher_thread; | |
| 727 | |
|
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728 static bool _startable; |
|
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|
729 volatile static bool _should_terminate; // updated without holding lock |
| 0 | 730 public: |
| 731 enum SomeConstants { | |
| 732 delay_interval = 10 // interrupt delay in milliseconds | |
| 733 }; | |
| 734 | |
| 735 // Constructor | |
| 736 WatcherThread(); | |
| 737 | |
| 738 // Tester | |
| 739 bool is_Watcher_thread() const { return true; } | |
| 740 | |
| 741 // Printing | |
| 742 char* name() const { return (char*)"VM Periodic Task Thread"; } | |
| 743 void print_on(outputStream* st) const; | |
| 744 void print() const { print_on(tty); } | |
|
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745 void unpark(); |
| 0 | 746 |
| 747 // Returns the single instance of WatcherThread | |
| 748 static WatcherThread* watcher_thread() { return _watcher_thread; } | |
| 749 | |
| 750 // Create and start the single instance of WatcherThread, or stop it on shutdown | |
| 751 static void start(); | |
| 752 static void stop(); | |
|
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753 // Only allow start once the VM is sufficiently initialized |
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754 // Otherwise the first task to enroll will trigger the start |
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755 static void make_startable(); |
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756 |
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757 private: |
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|
758 int sleep() const; |
| 0 | 759 }; |
| 760 | |
| 761 | |
| 762 class CompilerThread; | |
| 763 | |
| 764 typedef void (*ThreadFunction)(JavaThread*, TRAPS); | |
| 765 | |
| 766 class JavaThread: public Thread { | |
| 767 friend class VMStructs; | |
| 768 private: | |
| 769 JavaThread* _next; // The next thread in the Threads list | |
| 770 oop _threadObj; // The Java level thread object | |
| 771 | |
|
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772 // (thomaswue) Necessary for holding a compilation buffer. |
|
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Doug Simon <doug.simon@oracle.com>
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773 // Moved up from CompilerThread to JavaThread in order to enable code |
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e522a00b91aa
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Doug Simon <doug.simon@oracle.com>
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|
774 // installation from Java application code. |
|
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Various hacks to be able to install machine code from a Java thread.
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|
775 BufferBlob* _buffer_blob; |
| 0 | 776 #ifdef ASSERT |
| 777 private: | |
| 778 int _java_call_counter; | |
| 779 | |
| 780 public: | |
| 781 int java_call_counter() { return _java_call_counter; } | |
| 782 void inc_java_call_counter() { _java_call_counter++; } | |
| 783 void dec_java_call_counter() { | |
| 784 assert(_java_call_counter > 0, "Invalid nesting of JavaCallWrapper"); | |
| 785 _java_call_counter--; | |
| 786 } | |
| 787 private: // restore original namespace restriction | |
| 788 #endif // ifdef ASSERT | |
| 789 | |
| 790 #ifndef PRODUCT | |
| 791 public: | |
| 792 enum { | |
| 793 jump_ring_buffer_size = 16 | |
| 794 }; | |
| 795 private: // restore original namespace restriction | |
| 796 #endif | |
| 797 | |
| 798 JavaFrameAnchor _anchor; // Encapsulation of current java frame and it state | |
| 799 | |
| 800 ThreadFunction _entry_point; | |
| 801 | |
| 802 JNIEnv _jni_environment; | |
| 803 | |
| 804 // Deopt support | |
| 805 DeoptResourceMark* _deopt_mark; // Holds special ResourceMark for deoptimization | |
| 806 | |
| 807 intptr_t* _must_deopt_id; // id of frame that needs to be deopted once we | |
| 808 // transition out of native | |
|
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809 nmethod* _deopt_nmethod; // nmethod that is currently being deoptimized |
| 0 | 810 vframeArray* _vframe_array_head; // Holds the heap of the active vframeArrays |
| 811 vframeArray* _vframe_array_last; // Holds last vFrameArray we popped | |
| 812 // Because deoptimization is lazy we must save jvmti requests to set locals | |
| 813 // in compiled frames until we deoptimize and we have an interpreter frame. | |
| 814 // This holds the pointer to array (yeah like there might be more than one) of | |
| 815 // description of compiled vframes that have locals that need to be updated. | |
| 816 GrowableArray<jvmtiDeferredLocalVariableSet*>* _deferred_locals_updates; | |
| 817 | |
| 818 // Handshake value for fixing 6243940. We need a place for the i2c | |
|
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819 // adapter to store the callee Method*. This value is NEVER live |
| 0 | 820 // across a gc point so it does NOT have to be gc'd |
| 821 // The handshake is open ended since we can't be certain that it will | |
| 822 // be NULLed. This is because we rarely ever see the race and end up | |
| 823 // in handle_wrong_method which is the backend of the handshake. See | |
| 824 // code in i2c adapters and handle_wrong_method. | |
| 825 | |
|
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826 Method* _callee_target; |
| 0 | 827 |
|
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828 // Used to pass back results to the interpreter or generated code running Java code. |
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829 oop _vm_result; // oop result is GC-preserved |
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830 Metadata* _vm_result_2; // non-oop result |
|
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831 |
|
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832 // See ReduceInitialCardMarks: this holds the precise space interval of |
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833 // the most recent slow path allocation for which compiled code has |
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834 // elided card-marks for performance along the fast-path. |
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|
835 MemRegion _deferred_card_mark; |
| 0 | 836 |
| 837 MonitorChunk* _monitor_chunks; // Contains the off stack monitors | |
| 838 // allocated during deoptimization | |
| 839 // and by JNI_MonitorEnter/Exit | |
| 840 | |
| 841 // Async. requests support | |
| 842 enum AsyncRequests { | |
| 843 _no_async_condition = 0, | |
| 844 _async_exception, | |
| 845 _async_unsafe_access_error | |
| 846 }; | |
| 847 AsyncRequests _special_runtime_exit_condition; // Enum indicating pending async. request | |
| 848 oop _pending_async_exception; | |
| 849 | |
| 850 // Safepoint support | |
| 851 public: // Expose _thread_state for SafeFetchInt() | |
| 852 volatile JavaThreadState _thread_state; | |
| 853 private: | |
| 854 ThreadSafepointState *_safepoint_state; // Holds information about a thread during a safepoint | |
| 855 address _saved_exception_pc; // Saved pc of instruction where last implicit exception happened | |
| 856 | |
| 857 // JavaThread termination support | |
| 858 enum TerminatedTypes { | |
| 859 _not_terminated = 0xDEAD - 2, | |
| 860 _thread_exiting, // JavaThread::exit() has been called for this thread | |
| 861 _thread_terminated, // JavaThread is removed from thread list | |
| 862 _vm_exited // JavaThread is still executing native code, but VM is terminated | |
| 863 // only VM_Exit can set _vm_exited | |
| 864 }; | |
| 865 | |
| 866 // In general a JavaThread's _terminated field transitions as follows: | |
| 867 // | |
| 868 // _not_terminated => _thread_exiting => _thread_terminated | |
| 869 // | |
| 870 // _vm_exited is a special value to cover the case of a JavaThread | |
| 871 // executing native code after the VM itself is terminated. | |
|
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kamg
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|
872 volatile TerminatedTypes _terminated; |
| 0 | 873 // suspend/resume support |
| 874 volatile bool _suspend_equivalent; // Suspend equivalent condition | |
| 875 jint _in_deopt_handler; // count of deoptimization | |
| 876 // handlers thread is in | |
| 877 volatile bool _doing_unsafe_access; // Thread may fault due to unsafe access | |
| 878 bool _do_not_unlock_if_synchronized; // Do not unlock the receiver of a synchronized method (since it was | |
| 879 // never locked) when throwing an exception. Used by interpreter only. | |
| 880 | |
| 4006 | 881 // JNI attach states: |
| 882 enum JNIAttachStates { | |
| 883 _not_attaching_via_jni = 1, // thread is not attaching via JNI | |
| 884 _attaching_via_jni, // thread is attaching via JNI | |
| 885 _attached_via_jni // thread has attached via JNI | |
| 886 }; | |
| 887 | |
| 888 // A regular JavaThread's _jni_attach_state is _not_attaching_via_jni. | |
| 889 // A native thread that is attaching via JNI starts with a value | |
| 890 // of _attaching_via_jni and transitions to _attached_via_jni. | |
| 891 volatile JNIAttachStates _jni_attach_state; | |
| 0 | 892 |
| 893 public: | |
| 894 // State of the stack guard pages for this thread. | |
| 895 enum StackGuardState { | |
| 896 stack_guard_unused, // not needed | |
| 897 stack_guard_yellow_disabled,// disabled (temporarily) after stack overflow | |
| 898 stack_guard_enabled // enabled | |
| 899 }; | |
| 900 | |
| 901 private: | |
| 902 | |
|
5747
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added basic high-level interpreter support to HotSpot
Christian Haeubl <haeubl@ssw.jku.at>
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diff
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|
903 #ifdef GRAAL |
|
4993
897b7d18bebc
added RiCompiledMethod.execute and the required VM infrastructure
Lukas Stadler <lukas.stadler@jku.at>
parents:
4970
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|
904 address _graal_alternate_call_target; |
|
5747
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added basic high-level interpreter support to HotSpot
Christian Haeubl <haeubl@ssw.jku.at>
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|
905 #endif |
| 0 | 906 StackGuardState _stack_guard_state; |
| 907 | |
|
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Make NMethodSweeper work on any JavaThread
Gilles Duboscq <gilles.m.duboscq@gmail.com>
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|
908 nmethod* _scanned_nmethod; // nmethod being scanned by the sweeper |
|
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|
909 |
| 0 | 910 // Compiler exception handling (NOTE: The _exception_oop is *NOT* the same as _pending_exception. It is |
| 911 // used to temp. parsing values into and out of the runtime system during exception handling for compiled | |
| 912 // code) | |
| 913 volatile oop _exception_oop; // Exception thrown in compiled code | |
| 914 volatile address _exception_pc; // PC where exception happened | |
| 915 volatile address _exception_handler_pc; // PC for handler of exception | |
|
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6941529: SharedRuntime::raw_exception_handler_for_return_address must reset thread MethodHandle flag
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diff
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|
916 volatile int _is_method_handle_return; // true (== 1) if the current exception PC is a MethodHandle call site. |
| 0 | 917 |
| 918 // support for compilation | |
| 919 bool _is_compiling; // is true if a compilation is active inthis thread (one compilation per thread possible) | |
| 920 | |
| 921 // support for JNI critical regions | |
| 922 jint _jni_active_critical; // count of entries into JNI critical region | |
| 923 | |
| 924 // For deadlock detection. | |
| 925 int _depth_first_number; | |
| 926 | |
| 927 // JVMTI PopFrame support | |
| 928 // This is set to popframe_pending to signal that top Java frame should be popped immediately | |
| 929 int _popframe_condition; | |
| 930 | |
| 931 #ifndef PRODUCT | |
| 932 int _jmp_ring_index; | |
| 933 struct { | |
| 934 // We use intptr_t instead of address so debugger doesn't try and display strings | |
| 935 intptr_t _target; | |
| 936 intptr_t _instruction; | |
| 937 const char* _file; | |
| 938 int _line; | |
| 939 } _jmp_ring[ jump_ring_buffer_size ]; | |
| 940 #endif /* PRODUCT */ | |
| 941 | |
|
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942 #if INCLUDE_ALL_GCS |
| 342 | 943 // Support for G1 barriers |
| 944 | |
| 945 ObjPtrQueue _satb_mark_queue; // Thread-local log for SATB barrier. | |
| 946 // Set of all such queues. | |
| 947 static SATBMarkQueueSet _satb_mark_queue_set; | |
| 948 | |
| 949 DirtyCardQueue _dirty_card_queue; // Thread-local log for dirty cards. | |
| 950 // Set of all such queues. | |
| 951 static DirtyCardQueueSet _dirty_card_queue_set; | |
|
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952 |
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953 void flush_barrier_queues(); |
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954 #endif // INCLUDE_ALL_GCS |
| 342 | 955 |
| 0 | 956 friend class VMThread; |
| 957 friend class ThreadWaitTransition; | |
| 958 friend class VM_Exit; | |
| 959 | |
| 960 void initialize(); // Initialized the instance variables | |
| 961 | |
| 962 public: | |
| 963 // Constructor | |
| 4006 | 964 JavaThread(bool is_attaching_via_jni = false); // for main thread and JNI attached threads |
| 0 | 965 JavaThread(ThreadFunction entry_point, size_t stack_size = 0); |
| 966 ~JavaThread(); | |
| 967 | |
| 968 #ifdef ASSERT | |
| 969 // verify this JavaThread hasn't be published in the Threads::list yet | |
| 970 void verify_not_published(); | |
| 971 #endif | |
| 972 | |
| 973 //JNI functiontable getter/setter for JVMTI jni function table interception API. | |
| 974 void set_jni_functions(struct JNINativeInterface_* functionTable) { | |
| 975 _jni_environment.functions = functionTable; | |
| 976 } | |
| 977 struct JNINativeInterface_* get_jni_functions() { | |
| 978 return (struct JNINativeInterface_ *)_jni_environment.functions; | |
| 979 } | |
| 980 | |
|
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981 |
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982 BufferBlob* get_buffer_blob() { return _buffer_blob; } |
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983 void set_buffer_blob(BufferBlob* b) { _buffer_blob = b; }; |
| 0 | 984 |
|
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985 // This function is called at thread creation to allow |
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986 // platform specific thread variables to be initialized. |
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987 void cache_global_variables(); |
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988 |
| 0 | 989 // Executes Shutdown.shutdown() |
| 990 void invoke_shutdown_hooks(); | |
| 991 | |
| 992 // Cleanup on thread exit | |
| 993 enum ExitType { | |
| 994 normal_exit, | |
| 995 jni_detach | |
| 996 }; | |
| 997 void exit(bool destroy_vm, ExitType exit_type = normal_exit); | |
| 998 | |
| 999 void cleanup_failed_attach_current_thread(); | |
| 1000 | |
|
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1001 // Track the nmethod currently being scanned by the sweeper |
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1002 void set_scanned_nmethod(nmethod* nm) { |
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1003 assert(_scanned_nmethod == NULL || nm == NULL, "should reset to NULL before writing a new value"); |
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1004 _scanned_nmethod = nm; |
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1005 } |
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1006 |
| 0 | 1007 // Testers |
| 1008 virtual bool is_Java_thread() const { return true; } | |
| 1009 | |
| 1010 // compilation | |
| 1011 void set_is_compiling(bool f) { _is_compiling = f; } | |
| 1012 bool is_compiling() const { return _is_compiling; } | |
| 1013 | |
| 1014 // Thread chain operations | |
| 1015 JavaThread* next() const { return _next; } | |
| 1016 void set_next(JavaThread* p) { _next = p; } | |
| 1017 | |
| 1018 // Thread oop. threadObj() can be NULL for initial JavaThread | |
| 1019 // (or for threads attached via JNI) | |
| 1020 oop threadObj() const { return _threadObj; } | |
| 1021 void set_threadObj(oop p) { _threadObj = p; } | |
| 1022 | |
| 1023 ThreadPriority java_priority() const; // Read from threadObj() | |
| 1024 | |
| 1025 // Prepare thread and add to priority queue. If a priority is | |
| 1026 // not specified, use the priority of the thread object. Threads_lock | |
| 1027 // must be held while this function is called. | |
| 1028 void prepare(jobject jni_thread, ThreadPriority prio=NoPriority); | |
| 1029 | |
| 1030 void set_saved_exception_pc(address pc) { _saved_exception_pc = pc; } | |
| 1031 address saved_exception_pc() { return _saved_exception_pc; } | |
| 1032 | |
| 1033 | |
| 1034 ThreadFunction entry_point() const { return _entry_point; } | |
| 1035 | |
| 1036 // Allocates a new Java level thread object for this thread. thread_name may be NULL. | |
| 1037 void allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS); | |
| 1038 | |
| 1039 // Last frame anchor routines | |
| 1040 | |
| 1041 JavaFrameAnchor* frame_anchor(void) { return &_anchor; } | |
| 1042 | |
| 1043 // last_Java_sp | |
| 1044 bool has_last_Java_frame() const { return _anchor.has_last_Java_frame(); } | |
| 1045 intptr_t* last_Java_sp() const { return _anchor.last_Java_sp(); } | |
| 1046 | |
| 1047 // last_Java_pc | |
| 1048 | |
| 1049 address last_Java_pc(void) { return _anchor.last_Java_pc(); } | |
| 1050 | |
| 1051 // Safepoint support | |
| 1052 JavaThreadState thread_state() const { return _thread_state; } | |
| 1053 void set_thread_state(JavaThreadState s) { _thread_state=s; } | |
| 1054 ThreadSafepointState *safepoint_state() const { return _safepoint_state; } | |
| 1055 void set_safepoint_state(ThreadSafepointState *state) { _safepoint_state = state; } | |
| 1056 bool is_at_poll_safepoint() { return _safepoint_state->is_at_poll_safepoint(); } | |
| 1057 | |
| 1058 // thread has called JavaThread::exit() or is terminated | |
| 1059 bool is_exiting() { return _terminated == _thread_exiting || is_terminated(); } | |
| 1060 // thread is terminated (no longer on the threads list); we compare | |
| 1061 // against the two non-terminated values so that a freed JavaThread | |
| 1062 // will also be considered terminated. | |
| 1063 bool is_terminated() { return _terminated != _not_terminated && _terminated != _thread_exiting; } | |
| 1064 void set_terminated(TerminatedTypes t) { _terminated = t; } | |
| 1065 // special for Threads::remove() which is static: | |
| 1066 void set_terminated_value() { _terminated = _thread_terminated; } | |
| 1067 void block_if_vm_exited(); | |
| 1068 | |
| 1069 bool doing_unsafe_access() { return _doing_unsafe_access; } | |
| 1070 void set_doing_unsafe_access(bool val) { _doing_unsafe_access = val; } | |
| 1071 | |
| 1072 bool do_not_unlock_if_synchronized() { return _do_not_unlock_if_synchronized; } | |
| 1073 void set_do_not_unlock_if_synchronized(bool val) { _do_not_unlock_if_synchronized = val; } | |
| 1074 | |
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1075 #if INCLUDE_NMT |
| 6197 | 1076 // native memory tracking |
| 1077 inline MemRecorder* get_recorder() const { return (MemRecorder*)_recorder; } | |
| 1078 inline void set_recorder(MemRecorder* rc) { _recorder = (volatile MemRecorder*)rc; } | |
| 1079 | |
| 1080 private: | |
| 1081 // per-thread memory recorder | |
| 1082 volatile MemRecorder* _recorder; | |
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1083 #endif // INCLUDE_NMT |
| 0 | 1084 |
| 1085 // Suspend/resume support for JavaThread | |
| 1086 private: | |
| 1087 void set_ext_suspended() { set_suspend_flag (_ext_suspended); } | |
| 1088 void clear_ext_suspended() { clear_suspend_flag(_ext_suspended); } | |
| 1089 | |
| 1090 public: | |
| 1091 void java_suspend(); | |
| 1092 void java_resume(); | |
| 1093 int java_suspend_self(); | |
| 1094 | |
| 1095 void check_and_wait_while_suspended() { | |
| 1096 assert(JavaThread::current() == this, "sanity check"); | |
| 1097 | |
| 1098 bool do_self_suspend; | |
| 1099 do { | |
| 1100 // were we externally suspended while we were waiting? | |
| 1101 do_self_suspend = handle_special_suspend_equivalent_condition(); | |
| 1102 if (do_self_suspend) { | |
| 1103 // don't surprise the thread that suspended us by returning | |
| 1104 java_suspend_self(); | |
| 1105 set_suspend_equivalent(); | |
| 1106 } | |
| 1107 } while (do_self_suspend); | |
| 1108 } | |
| 1109 static void check_safepoint_and_suspend_for_native_trans(JavaThread *thread); | |
| 1110 // Check for async exception in addition to safepoint and suspend request. | |
| 1111 static void check_special_condition_for_native_trans(JavaThread *thread); | |
| 1112 | |
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1113 // Same as check_special_condition_for_native_trans but finishes the |
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1114 // transition into thread_in_Java mode so that it can potentially |
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1115 // block. |
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1116 static void check_special_condition_for_native_trans_and_transition(JavaThread *thread); |
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1117 |
| 0 | 1118 bool is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits); |
| 1119 bool is_ext_suspend_completed_with_lock(uint32_t *bits) { | |
| 1120 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1121 // Warning: is_ext_suspend_completed() may temporarily drop the | |
| 1122 // SR_lock to allow the thread to reach a stable thread state if | |
| 1123 // it is currently in a transient thread state. | |
| 1124 return is_ext_suspend_completed(false /*!called_by_wait */, | |
| 1125 SuspendRetryDelay, bits); | |
| 1126 } | |
| 1127 | |
| 1128 // We cannot allow wait_for_ext_suspend_completion() to run forever or | |
| 1129 // we could hang. SuspendRetryCount and SuspendRetryDelay are normally | |
| 1130 // passed as the count and delay parameters. Experiments with specific | |
| 1131 // calls to wait_for_ext_suspend_completion() can be done by passing | |
| 1132 // other values in the code. Experiments with all calls can be done | |
| 1133 // via the appropriate -XX options. | |
| 1134 bool wait_for_ext_suspend_completion(int count, int delay, uint32_t *bits); | |
| 1135 | |
| 1136 void set_external_suspend() { set_suspend_flag (_external_suspend); } | |
| 1137 void clear_external_suspend() { clear_suspend_flag(_external_suspend); } | |
| 1138 | |
| 1139 void set_deopt_suspend() { set_suspend_flag (_deopt_suspend); } | |
| 1140 void clear_deopt_suspend() { clear_suspend_flag(_deopt_suspend); } | |
| 1141 bool is_deopt_suspend() { return (_suspend_flags & _deopt_suspend) != 0; } | |
| 1142 | |
| 1143 bool is_external_suspend() const { | |
| 1144 return (_suspend_flags & _external_suspend) != 0; | |
| 1145 } | |
| 1146 // Whenever a thread transitions from native to vm/java it must suspend | |
| 1147 // if external|deopt suspend is present. | |
| 1148 bool is_suspend_after_native() const { | |
| 1149 return (_suspend_flags & (_external_suspend | _deopt_suspend) ) != 0; | |
| 1150 } | |
| 1151 | |
| 1152 // external suspend request is completed | |
| 1153 bool is_ext_suspended() const { | |
| 1154 return (_suspend_flags & _ext_suspended) != 0; | |
| 1155 } | |
| 1156 | |
| 1157 bool is_external_suspend_with_lock() const { | |
| 1158 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1159 return is_external_suspend(); | |
| 1160 } | |
| 1161 | |
| 1162 // Special method to handle a pending external suspend request | |
| 1163 // when a suspend equivalent condition lifts. | |
| 1164 bool handle_special_suspend_equivalent_condition() { | |
| 1165 assert(is_suspend_equivalent(), | |
| 1166 "should only be called in a suspend equivalence condition"); | |
| 1167 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1168 bool ret = is_external_suspend(); | |
| 1169 if (!ret) { | |
| 1170 // not about to self-suspend so clear suspend equivalence | |
| 1171 clear_suspend_equivalent(); | |
| 1172 } | |
| 1173 // implied else: | |
| 1174 // We have a pending external suspend request so we leave the | |
| 1175 // suspend_equivalent flag set until java_suspend_self() sets | |
| 1176 // the ext_suspended flag and clears the suspend_equivalent | |
| 1177 // flag. This insures that wait_for_ext_suspend_completion() | |
| 1178 // will return consistent values. | |
| 1179 return ret; | |
| 1180 } | |
| 1181 | |
| 1182 // utility methods to see if we are doing some kind of suspension | |
| 1183 bool is_being_ext_suspended() const { | |
| 1184 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1185 return is_ext_suspended() || is_external_suspend(); | |
| 1186 } | |
| 1187 | |
| 1188 bool is_suspend_equivalent() const { return _suspend_equivalent; } | |
| 1189 | |
| 1190 void set_suspend_equivalent() { _suspend_equivalent = true; }; | |
| 1191 void clear_suspend_equivalent() { _suspend_equivalent = false; }; | |
| 1192 | |
| 1193 // Thread.stop support | |
| 1194 void send_thread_stop(oop throwable); | |
| 1195 AsyncRequests clear_special_runtime_exit_condition() { | |
| 1196 AsyncRequests x = _special_runtime_exit_condition; | |
| 1197 _special_runtime_exit_condition = _no_async_condition; | |
| 1198 return x; | |
| 1199 } | |
| 1200 | |
| 1201 // Are any async conditions present? | |
| 1202 bool has_async_condition() { return (_special_runtime_exit_condition != _no_async_condition); } | |
| 1203 | |
| 1204 void check_and_handle_async_exceptions(bool check_unsafe_error = true); | |
| 1205 | |
| 1206 // these next two are also used for self-suspension and async exception support | |
| 1207 void handle_special_runtime_exit_condition(bool check_asyncs = true); | |
| 1208 | |
| 1209 // Return true if JavaThread has an asynchronous condition or | |
| 1210 // if external suspension is requested. | |
| 1211 bool has_special_runtime_exit_condition() { | |
| 1212 // We call is_external_suspend() last since external suspend should | |
| 1213 // be less common. Because we don't use is_external_suspend_with_lock | |
| 1214 // it is possible that we won't see an asynchronous external suspend | |
| 1215 // request that has just gotten started, i.e., SR_lock grabbed but | |
| 1216 // _external_suspend field change either not made yet or not visible | |
| 1217 // yet. However, this is okay because the request is asynchronous and | |
| 1218 // we will see the new flag value the next time through. It's also | |
| 1219 // possible that the external suspend request is dropped after | |
| 1220 // we have checked is_external_suspend(), we will recheck its value | |
| 1221 // under SR_lock in java_suspend_self(). | |
| 1222 return (_special_runtime_exit_condition != _no_async_condition) || | |
| 1223 is_external_suspend() || is_deopt_suspend(); | |
| 1224 } | |
| 1225 | |
| 1226 void set_pending_unsafe_access_error() { _special_runtime_exit_condition = _async_unsafe_access_error; } | |
| 1227 | |
| 1228 void set_pending_async_exception(oop e) { | |
| 1229 _pending_async_exception = e; | |
| 1230 _special_runtime_exit_condition = _async_exception; | |
| 1231 set_has_async_exception(); | |
| 1232 } | |
| 1233 | |
| 1234 // Fast-locking support | |
| 1235 bool is_lock_owned(address adr) const; | |
| 1236 | |
| 1237 // Accessors for vframe array top | |
| 1238 // The linked list of vframe arrays are sorted on sp. This means when we | |
| 1239 // unpack the head must contain the vframe array to unpack. | |
| 1240 void set_vframe_array_head(vframeArray* value) { _vframe_array_head = value; } | |
| 1241 vframeArray* vframe_array_head() const { return _vframe_array_head; } | |
| 1242 | |
| 1243 // Side structure for defering update of java frame locals until deopt occurs | |
| 1244 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred_locals() const { return _deferred_locals_updates; } | |
| 1245 void set_deferred_locals(GrowableArray<jvmtiDeferredLocalVariableSet *>* vf) { _deferred_locals_updates = vf; } | |
| 1246 | |
| 1247 // These only really exist to make debugging deopt problems simpler | |
| 1248 | |
| 1249 void set_vframe_array_last(vframeArray* value) { _vframe_array_last = value; } | |
| 1250 vframeArray* vframe_array_last() const { return _vframe_array_last; } | |
| 1251 | |
| 1252 // The special resourceMark used during deoptimization | |
| 1253 | |
| 1254 void set_deopt_mark(DeoptResourceMark* value) { _deopt_mark = value; } | |
| 1255 DeoptResourceMark* deopt_mark(void) { return _deopt_mark; } | |
| 1256 | |
| 1257 intptr_t* must_deopt_id() { return _must_deopt_id; } | |
| 1258 void set_must_deopt_id(intptr_t* id) { _must_deopt_id = id; } | |
| 1259 void clear_must_deopt_id() { _must_deopt_id = NULL; } | |
| 1260 | |
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1261 void set_deopt_nmethod(nmethod* nm) { _deopt_nmethod = nm; } |
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1262 nmethod* deopt_nmethod() { return _deopt_nmethod; } |
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1264 Method* callee_target() const { return _callee_target; } |
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1265 void set_callee_target (Method* x) { _callee_target = x; } |
| 0 | 1266 |
| 1267 // Oop results of vm runtime calls | |
| 1268 oop vm_result() const { return _vm_result; } | |
| 1269 void set_vm_result (oop x) { _vm_result = x; } | |
| 1270 | |
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1271 Metadata* vm_result_2() const { return _vm_result_2; } |
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1272 void set_vm_result_2 (Metadata* x) { _vm_result_2 = x; } |
| 0 | 1273 |
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1274 MemRegion deferred_card_mark() const { return _deferred_card_mark; } |
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1275 void set_deferred_card_mark(MemRegion mr) { _deferred_card_mark = mr; } |
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1276 |
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1277 #ifdef GRAAL |
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1278 void set_graal_alternate_call_target(address a) { _graal_alternate_call_target = a; } |
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1279 #endif |
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1280 |
| 0 | 1281 // Exception handling for compiled methods |
| 1282 oop exception_oop() const { return _exception_oop; } | |
| 1283 address exception_pc() const { return _exception_pc; } | |
| 1284 address exception_handler_pc() const { return _exception_handler_pc; } | |
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1285 bool is_method_handle_return() const { return _is_method_handle_return == 1; } |
| 0 | 1286 |
| 1287 void set_exception_oop(oop o) { _exception_oop = o; } | |
| 1288 void set_exception_pc(address a) { _exception_pc = a; } | |
| 1289 void set_exception_handler_pc(address a) { _exception_handler_pc = a; } | |
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1290 void set_is_method_handle_return(bool value) { _is_method_handle_return = value ? 1 : 0; } |
| 0 | 1291 |
| 1292 // Stack overflow support | |
| 1293 inline size_t stack_available(address cur_sp); | |
| 1294 address stack_yellow_zone_base() | |
| 1295 { return (address)(stack_base() - (stack_size() - (stack_red_zone_size() + stack_yellow_zone_size()))); } | |
| 1296 size_t stack_yellow_zone_size() | |
| 1297 { return StackYellowPages * os::vm_page_size(); } | |
| 1298 address stack_red_zone_base() | |
| 1299 { return (address)(stack_base() - (stack_size() - stack_red_zone_size())); } | |
| 1300 size_t stack_red_zone_size() | |
| 1301 { return StackRedPages * os::vm_page_size(); } | |
| 1302 bool in_stack_yellow_zone(address a) | |
| 1303 { return (a <= stack_yellow_zone_base()) && (a >= stack_red_zone_base()); } | |
| 1304 bool in_stack_red_zone(address a) | |
| 1305 { return (a <= stack_red_zone_base()) && (a >= (address)((intptr_t)stack_base() - stack_size())); } | |
| 1306 | |
| 1307 void create_stack_guard_pages(); | |
| 1308 void remove_stack_guard_pages(); | |
| 1309 | |
| 1310 void enable_stack_yellow_zone(); | |
| 1311 void disable_stack_yellow_zone(); | |
| 1312 void enable_stack_red_zone(); | |
| 1313 void disable_stack_red_zone(); | |
| 1314 | |
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1315 inline bool stack_guard_zone_unused(); |
| 0 | 1316 inline bool stack_yellow_zone_disabled(); |
| 1317 inline bool stack_yellow_zone_enabled(); | |
| 1318 | |
| 1319 // Attempt to reguard the stack after a stack overflow may have occurred. | |
| 1320 // Returns true if (a) guard pages are not needed on this thread, (b) the | |
| 1321 // pages are already guarded, or (c) the pages were successfully reguarded. | |
| 1322 // Returns false if there is not enough stack space to reguard the pages, in | |
| 1323 // which case the caller should unwind a frame and try again. The argument | |
| 1324 // should be the caller's (approximate) sp. | |
| 1325 bool reguard_stack(address cur_sp); | |
| 1326 // Similar to above but see if current stackpoint is out of the guard area | |
| 1327 // and reguard if possible. | |
| 1328 bool reguard_stack(void); | |
| 1329 | |
| 1330 // Misc. accessors/mutators | |
| 1331 void set_do_not_unlock(void) { _do_not_unlock_if_synchronized = true; } | |
| 1332 void clr_do_not_unlock(void) { _do_not_unlock_if_synchronized = false; } | |
| 1333 bool do_not_unlock(void) { return _do_not_unlock_if_synchronized; } | |
| 1334 | |
| 1335 #ifndef PRODUCT | |
| 1336 void record_jump(address target, address instr, const char* file, int line); | |
| 1337 #endif /* PRODUCT */ | |
| 1338 | |
| 1339 // For assembly stub generation | |
| 1340 static ByteSize threadObj_offset() { return byte_offset_of(JavaThread, _threadObj ); } | |
| 1341 #ifndef PRODUCT | |
| 1342 static ByteSize jmp_ring_index_offset() { return byte_offset_of(JavaThread, _jmp_ring_index ); } | |
| 1343 static ByteSize jmp_ring_offset() { return byte_offset_of(JavaThread, _jmp_ring ); } | |
| 1344 #endif /* PRODUCT */ | |
| 1345 static ByteSize jni_environment_offset() { return byte_offset_of(JavaThread, _jni_environment ); } | |
| 1346 static ByteSize last_Java_sp_offset() { | |
| 1347 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_sp_offset(); | |
| 1348 } | |
| 1349 static ByteSize last_Java_pc_offset() { | |
| 1350 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_pc_offset(); | |
| 1351 } | |
| 1352 static ByteSize frame_anchor_offset() { | |
| 1353 return byte_offset_of(JavaThread, _anchor); | |
| 1354 } | |
| 1355 static ByteSize callee_target_offset() { return byte_offset_of(JavaThread, _callee_target ); } | |
| 1356 static ByteSize vm_result_offset() { return byte_offset_of(JavaThread, _vm_result ); } | |
| 1357 static ByteSize vm_result_2_offset() { return byte_offset_of(JavaThread, _vm_result_2 ); } | |
| 1358 static ByteSize thread_state_offset() { return byte_offset_of(JavaThread, _thread_state ); } | |
| 1359 static ByteSize saved_exception_pc_offset() { return byte_offset_of(JavaThread, _saved_exception_pc ); } | |
| 1360 static ByteSize osthread_offset() { return byte_offset_of(JavaThread, _osthread ); } | |
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1361 #ifdef GRAAL |
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1362 static ByteSize graal_alternate_call_target_offset() { return byte_offset_of(JavaThread, _graal_alternate_call_target); } |
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1363 #endif |
| 0 | 1364 static ByteSize exception_oop_offset() { return byte_offset_of(JavaThread, _exception_oop ); } |
| 1365 static ByteSize exception_pc_offset() { return byte_offset_of(JavaThread, _exception_pc ); } | |
| 1366 static ByteSize exception_handler_pc_offset() { return byte_offset_of(JavaThread, _exception_handler_pc); } | |
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1367 static ByteSize is_method_handle_return_offset() { return byte_offset_of(JavaThread, _is_method_handle_return); } |
| 0 | 1368 static ByteSize stack_guard_state_offset() { return byte_offset_of(JavaThread, _stack_guard_state ); } |
| 1369 static ByteSize suspend_flags_offset() { return byte_offset_of(JavaThread, _suspend_flags ); } | |
| 1370 | |
| 1371 static ByteSize do_not_unlock_if_synchronized_offset() { return byte_offset_of(JavaThread, _do_not_unlock_if_synchronized); } | |
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1372 static ByteSize should_post_on_exceptions_flag_offset() { |
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1373 return byte_offset_of(JavaThread, _should_post_on_exceptions_flag); |
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1374 } |
| 0 | 1375 |
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1376 #if INCLUDE_ALL_GCS |
| 342 | 1377 static ByteSize satb_mark_queue_offset() { return byte_offset_of(JavaThread, _satb_mark_queue); } |
| 1378 static ByteSize dirty_card_queue_offset() { return byte_offset_of(JavaThread, _dirty_card_queue); } | |
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1379 #endif // INCLUDE_ALL_GCS |
| 342 | 1380 |
| 0 | 1381 // Returns the jni environment for this thread |
| 1382 JNIEnv* jni_environment() { return &_jni_environment; } | |
| 1383 | |
| 1384 static JavaThread* thread_from_jni_environment(JNIEnv* env) { | |
| 1385 JavaThread *thread_from_jni_env = (JavaThread*)((intptr_t)env - in_bytes(jni_environment_offset())); | |
| 1386 // Only return NULL if thread is off the thread list; starting to | |
| 1387 // exit should not return NULL. | |
| 1388 if (thread_from_jni_env->is_terminated()) { | |
| 1389 thread_from_jni_env->block_if_vm_exited(); | |
| 1390 return NULL; | |
| 1391 } else { | |
| 1392 return thread_from_jni_env; | |
| 1393 } | |
| 1394 } | |
| 1395 | |
| 1396 // JNI critical regions. These can nest. | |
| 1397 bool in_critical() { return _jni_active_critical > 0; } | |
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1398 bool in_last_critical() { return _jni_active_critical == 1; } |
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1399 void enter_critical() { assert(Thread::current() == this || |
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1400 Thread::current()->is_VM_thread() && SafepointSynchronize::is_synchronizing(), |
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1401 "this must be current thread or synchronizing"); |
| 0 | 1402 _jni_active_critical++; } |
| 1403 void exit_critical() { assert(Thread::current() == this, | |
| 1404 "this must be current thread"); | |
| 1405 _jni_active_critical--; | |
| 1406 assert(_jni_active_critical >= 0, | |
| 1407 "JNI critical nesting problem?"); } | |
| 1408 | |
| 1409 // For deadlock detection | |
| 1410 int depth_first_number() { return _depth_first_number; } | |
| 1411 void set_depth_first_number(int dfn) { _depth_first_number = dfn; } | |
| 1412 | |
| 1413 private: | |
| 1414 void set_monitor_chunks(MonitorChunk* monitor_chunks) { _monitor_chunks = monitor_chunks; } | |
| 1415 | |
| 1416 public: | |
| 1417 MonitorChunk* monitor_chunks() const { return _monitor_chunks; } | |
| 1418 void add_monitor_chunk(MonitorChunk* chunk); | |
| 1419 void remove_monitor_chunk(MonitorChunk* chunk); | |
| 1420 bool in_deopt_handler() const { return _in_deopt_handler > 0; } | |
| 1421 void inc_in_deopt_handler() { _in_deopt_handler++; } | |
| 1422 void dec_in_deopt_handler() { | |
| 1423 assert(_in_deopt_handler > 0, "mismatched deopt nesting"); | |
| 1424 if (_in_deopt_handler > 0) { // robustness | |
| 1425 _in_deopt_handler--; | |
| 1426 } | |
| 1427 } | |
| 1428 | |
| 1429 private: | |
| 1430 void set_entry_point(ThreadFunction entry_point) { _entry_point = entry_point; } | |
| 1431 | |
| 1432 public: | |
| 1433 | |
| 1434 // Frame iteration; calls the function f for all frames on the stack | |
| 1435 void frames_do(void f(frame*, const RegisterMap*)); | |
| 1436 | |
| 1437 // Memory operations | |
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1438 void oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf); |
| 0 | 1439 |
| 1440 // Sweeper operations | |
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1441 void nmethods_do(CodeBlobClosure* cf); |
| 0 | 1442 |
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1443 // RedefineClasses Support |
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1444 void metadata_do(void f(Metadata*)); |
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1445 |
| 0 | 1446 // Memory management operations |
| 1447 void gc_epilogue(); | |
| 1448 void gc_prologue(); | |
| 1449 | |
| 1450 // Misc. operations | |
| 1451 char* name() const { return (char*)get_thread_name(); } | |
| 1452 void print_on(outputStream* st) const; | |
| 1453 void print() const { print_on(tty); } | |
| 1454 void print_value(); | |
| 1455 void print_thread_state_on(outputStream* ) const PRODUCT_RETURN; | |
| 1456 void print_thread_state() const PRODUCT_RETURN; | |
| 1457 void print_on_error(outputStream* st, char* buf, int buflen) const; | |
| 1458 void verify(); | |
| 1459 const char* get_thread_name() const; | |
| 1460 private: | |
| 1461 // factor out low-level mechanics for use in both normal and error cases | |
| 1462 const char* get_thread_name_string(char* buf = NULL, int buflen = 0) const; | |
| 1463 public: | |
| 1464 const char* get_threadgroup_name() const; | |
| 1465 const char* get_parent_name() const; | |
| 1466 | |
| 1467 // Accessing frames | |
| 1468 frame last_frame() { | |
| 1469 _anchor.make_walkable(this); | |
| 1470 return pd_last_frame(); | |
| 1471 } | |
| 1472 javaVFrame* last_java_vframe(RegisterMap* reg_map); | |
| 1473 | |
| 1474 // Returns method at 'depth' java or native frames down the stack | |
| 1475 // Used for security checks | |
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1476 Klass* security_get_caller_class(int depth); |
| 0 | 1477 |
| 1478 // Print stack trace in external format | |
| 1479 void print_stack_on(outputStream* st); | |
| 1480 void print_stack() { print_stack_on(tty); } | |
| 1481 | |
| 1482 // Print stack traces in various internal formats | |
| 1483 void trace_stack() PRODUCT_RETURN; | |
| 1484 void trace_stack_from(vframe* start_vf) PRODUCT_RETURN; | |
| 1485 void trace_frames() PRODUCT_RETURN; | |
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1486 void trace_oops() PRODUCT_RETURN; |
| 0 | 1487 |
|
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1488 // Print an annotated view of the stack frames |
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1489 void print_frame_layout(int depth = 0, bool validate_only = false) NOT_DEBUG_RETURN; |
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1490 void validate_frame_layout() { |
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1491 print_frame_layout(0, true); |
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1492 } |
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1493 |
| 0 | 1494 // Returns the number of stack frames on the stack |
| 1495 int depth() const; | |
| 1496 | |
| 1497 // Function for testing deoptimization | |
| 1498 void deoptimize(); | |
| 1499 void make_zombies(); | |
| 1500 | |
| 1501 void deoptimized_wrt_marked_nmethods(); | |
| 1502 | |
| 1503 // Profiling operation (see fprofile.cpp) | |
| 1504 public: | |
| 1505 bool profile_last_Java_frame(frame* fr); | |
| 1506 | |
| 1507 private: | |
| 1508 ThreadProfiler* _thread_profiler; | |
| 1509 private: | |
| 1510 friend class FlatProfiler; // uses both [gs]et_thread_profiler. | |
| 1511 friend class FlatProfilerTask; // uses get_thread_profiler. | |
| 1512 friend class ThreadProfilerMark; // uses get_thread_profiler. | |
| 1513 ThreadProfiler* get_thread_profiler() { return _thread_profiler; } | |
| 1514 ThreadProfiler* set_thread_profiler(ThreadProfiler* tp) { | |
| 1515 ThreadProfiler* result = _thread_profiler; | |
| 1516 _thread_profiler = tp; | |
| 1517 return result; | |
| 1518 } | |
| 1519 | |
| 6197 | 1520 // NMT (Native memory tracking) support. |
| 1521 // This flag helps NMT to determine if this JavaThread will be blocked | |
| 1522 // at safepoint. If not, ThreadCritical is needed for writing memory records. | |
| 1523 // JavaThread is only safepoint visible when it is in Threads' thread list, | |
| 1524 // it is not visible until it is added to the list and becomes invisible | |
| 1525 // once it is removed from the list. | |
| 1526 public: | |
| 1527 bool is_safepoint_visible() const { return _safepoint_visible; } | |
| 1528 void set_safepoint_visible(bool visible) { _safepoint_visible = visible; } | |
| 1529 private: | |
| 1530 bool _safepoint_visible; | |
| 1531 | |
| 0 | 1532 // Static operations |
| 1533 public: | |
| 1534 // Returns the running thread as a JavaThread | |
| 1535 static inline JavaThread* current(); | |
| 1536 | |
| 1537 // Returns the active Java thread. Do not use this if you know you are calling | |
| 1538 // from a JavaThread, as it's slower than JavaThread::current. If called from | |
| 1539 // the VMThread, it also returns the JavaThread that instigated the VMThread's | |
| 1540 // operation. You may not want that either. | |
| 1541 static JavaThread* active(); | |
| 1542 | |
| 1543 inline CompilerThread* as_CompilerThread(); | |
| 1544 | |
| 1545 public: | |
| 1546 virtual void run(); | |
| 1547 void thread_main_inner(); | |
| 1548 | |
| 1549 private: | |
| 1550 // PRIVILEGED STACK | |
| 1551 PrivilegedElement* _privileged_stack_top; | |
| 1552 GrowableArray<oop>* _array_for_gc; | |
| 1553 public: | |
| 1554 | |
| 1555 // Returns the privileged_stack information. | |
| 1556 PrivilegedElement* privileged_stack_top() const { return _privileged_stack_top; } | |
| 1557 void set_privileged_stack_top(PrivilegedElement *e) { _privileged_stack_top = e; } | |
| 1558 void register_array_for_gc(GrowableArray<oop>* array) { _array_for_gc = array; } | |
| 1559 | |
| 1560 public: | |
| 1561 // Thread local information maintained by JVMTI. | |
| 1562 void set_jvmti_thread_state(JvmtiThreadState *value) { _jvmti_thread_state = value; } | |
|
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1563 // A JvmtiThreadState is lazily allocated. This jvmti_thread_state() |
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1564 // getter is used to get this JavaThread's JvmtiThreadState if it has |
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1565 // one which means NULL can be returned. JvmtiThreadState::state_for() |
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1566 // is used to get the specified JavaThread's JvmtiThreadState if it has |
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1567 // one or it allocates a new JvmtiThreadState for the JavaThread and |
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1568 // returns it. JvmtiThreadState::state_for() will return NULL only if |
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1569 // the specified JavaThread is exiting. |
| 0 | 1570 JvmtiThreadState *jvmti_thread_state() const { return _jvmti_thread_state; } |
| 1571 static ByteSize jvmti_thread_state_offset() { return byte_offset_of(JavaThread, _jvmti_thread_state); } | |
| 1572 void set_jvmti_get_loaded_classes_closure(JvmtiGetLoadedClassesClosure* value) { _jvmti_get_loaded_classes_closure = value; } | |
| 1573 JvmtiGetLoadedClassesClosure* get_jvmti_get_loaded_classes_closure() const { return _jvmti_get_loaded_classes_closure; } | |
| 1574 | |
| 1575 // JVMTI PopFrame support | |
| 1576 // Setting and clearing popframe_condition | |
| 1577 // All of these enumerated values are bits. popframe_pending | |
| 1578 // indicates that a PopFrame() has been requested and not yet been | |
| 1579 // completed. popframe_processing indicates that that PopFrame() is in | |
| 1580 // the process of being completed. popframe_force_deopt_reexecution_bit | |
| 1581 // indicates that special handling is required when returning to a | |
| 1582 // deoptimized caller. | |
| 1583 enum PopCondition { | |
| 1584 popframe_inactive = 0x00, | |
| 1585 popframe_pending_bit = 0x01, | |
| 1586 popframe_processing_bit = 0x02, | |
| 1587 popframe_force_deopt_reexecution_bit = 0x04 | |
| 1588 }; | |
| 1589 PopCondition popframe_condition() { return (PopCondition) _popframe_condition; } | |
| 1590 void set_popframe_condition(PopCondition c) { _popframe_condition = c; } | |
| 1591 void set_popframe_condition_bit(PopCondition c) { _popframe_condition |= c; } | |
| 1592 void clear_popframe_condition() { _popframe_condition = popframe_inactive; } | |
| 1593 static ByteSize popframe_condition_offset() { return byte_offset_of(JavaThread, _popframe_condition); } | |
| 1594 bool has_pending_popframe() { return (popframe_condition() & popframe_pending_bit) != 0; } | |
| 1595 bool popframe_forcing_deopt_reexecution() { return (popframe_condition() & popframe_force_deopt_reexecution_bit) != 0; } | |
| 1596 void clear_popframe_forcing_deopt_reexecution() { _popframe_condition &= ~popframe_force_deopt_reexecution_bit; } | |
| 1597 #ifdef CC_INTERP | |
| 1598 bool pop_frame_pending(void) { return ((_popframe_condition & popframe_pending_bit) != 0); } | |
| 1599 void clr_pop_frame_pending(void) { _popframe_condition = popframe_inactive; } | |
| 1600 bool pop_frame_in_process(void) { return ((_popframe_condition & popframe_processing_bit) != 0); } | |
| 1601 void set_pop_frame_in_process(void) { _popframe_condition |= popframe_processing_bit; } | |
| 1602 void clr_pop_frame_in_process(void) { _popframe_condition &= ~popframe_processing_bit; } | |
| 1603 #endif | |
| 1604 | |
| 1605 private: | |
| 1606 // Saved incoming arguments to popped frame. | |
| 1607 // Used only when popped interpreted frame returns to deoptimized frame. | |
| 1608 void* _popframe_preserved_args; | |
| 1609 int _popframe_preserved_args_size; | |
| 1610 | |
| 1611 public: | |
| 1612 void popframe_preserve_args(ByteSize size_in_bytes, void* start); | |
| 1613 void* popframe_preserved_args(); | |
| 1614 ByteSize popframe_preserved_args_size(); | |
| 1615 WordSize popframe_preserved_args_size_in_words(); | |
| 1616 void popframe_free_preserved_args(); | |
| 1617 | |
| 1618 | |
| 1619 private: | |
| 1620 JvmtiThreadState *_jvmti_thread_state; | |
| 1621 JvmtiGetLoadedClassesClosure* _jvmti_get_loaded_classes_closure; | |
| 1622 | |
| 1623 // Used by the interpreter in fullspeed mode for frame pop, method | |
| 1624 // entry, method exit and single stepping support. This field is | |
| 1625 // only set to non-zero by the VM_EnterInterpOnlyMode VM operation. | |
| 1626 // It can be set to zero asynchronously (i.e., without a VM operation | |
| 1627 // or a lock) so we have to be very careful. | |
| 1628 int _interp_only_mode; | |
| 1629 | |
| 1630 public: | |
| 1631 // used by the interpreter for fullspeed debugging support (see above) | |
| 1632 static ByteSize interp_only_mode_offset() { return byte_offset_of(JavaThread, _interp_only_mode); } | |
| 1633 bool is_interp_only_mode() { return (_interp_only_mode != 0); } | |
| 1634 int get_interp_only_mode() { return _interp_only_mode; } | |
| 1635 void increment_interp_only_mode() { ++_interp_only_mode; } | |
| 1636 void decrement_interp_only_mode() { --_interp_only_mode; } | |
| 1637 | |
|
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1638 // support for cached flag that indicates whether exceptions need to be posted for this thread |
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1639 // if this is false, we can avoid deoptimizing when events are thrown |
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1640 // this gets set to reflect whether jvmtiExport::post_exception_throw would actually do anything |
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1641 private: |
|
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1642 int _should_post_on_exceptions_flag; |
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1643 |
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1644 public: |
|
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1645 int should_post_on_exceptions_flag() { return _should_post_on_exceptions_flag; } |
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1646 void set_should_post_on_exceptions_flag(int val) { _should_post_on_exceptions_flag = val; } |
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|
1647 |
| 0 | 1648 private: |
| 1649 ThreadStatistics *_thread_stat; | |
| 1650 | |
| 1651 public: | |
| 1652 ThreadStatistics* get_thread_stat() const { return _thread_stat; } | |
| 1653 | |
| 1654 // Return a blocker object for which this thread is blocked parking. | |
| 1655 oop current_park_blocker(); | |
| 1656 | |
| 1657 private: | |
| 1658 static size_t _stack_size_at_create; | |
| 1659 | |
| 1660 public: | |
| 1661 static inline size_t stack_size_at_create(void) { | |
| 1662 return _stack_size_at_create; | |
| 1663 } | |
| 1664 static inline void set_stack_size_at_create(size_t value) { | |
| 1665 _stack_size_at_create = value; | |
| 1666 } | |
| 1667 | |
|
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1668 #if INCLUDE_ALL_GCS |
| 342 | 1669 // SATB marking queue support |
| 1670 ObjPtrQueue& satb_mark_queue() { return _satb_mark_queue; } | |
| 1671 static SATBMarkQueueSet& satb_mark_queue_set() { | |
| 1672 return _satb_mark_queue_set; | |
| 1673 } | |
| 1674 | |
| 1675 // Dirty card queue support | |
| 1676 DirtyCardQueue& dirty_card_queue() { return _dirty_card_queue; } | |
| 1677 static DirtyCardQueueSet& dirty_card_queue_set() { | |
| 1678 return _dirty_card_queue_set; | |
| 1679 } | |
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1680 #endif // INCLUDE_ALL_GCS |
| 342 | 1681 |
|
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1682 // This method initializes the SATB and dirty card queues before a |
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1683 // JavaThread is added to the Java thread list. Right now, we don't |
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1684 // have to do anything to the dirty card queue (it should have been |
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|
1685 // activated when the thread was created), but we have to activate |
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1686 // the SATB queue if the thread is created while a marking cycle is |
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1687 // in progress. The activation / de-activation of the SATB queues at |
|
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1688 // the beginning / end of a marking cycle is done during safepoints |
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1689 // so we have to make sure this method is called outside one to be |
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1690 // able to safely read the active field of the SATB queue set. Right |
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1691 // now, it is called just before the thread is added to the Java |
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1692 // thread list in the Threads::add() method. That method is holding |
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1693 // the Threads_lock which ensures we are outside a safepoint. We |
|
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1694 // cannot do the obvious and set the active field of the SATB queue |
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1695 // when the thread is created given that, in some cases, safepoints |
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1696 // might happen between the JavaThread constructor being called and the |
|
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1697 // thread being added to the Java thread list (an example of this is |
|
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1698 // when the structure for the DestroyJavaVM thread is created). |
|
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1699 #if INCLUDE_ALL_GCS |
|
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1700 void initialize_queues(); |
|
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1701 #else // INCLUDE_ALL_GCS |
|
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1702 void initialize_queues() { } |
|
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1703 #endif // INCLUDE_ALL_GCS |
|
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1704 |
| 0 | 1705 // Machine dependent stuff |
| 1972 | 1706 #ifdef TARGET_OS_ARCH_linux_x86 |
| 1707 # include "thread_linux_x86.hpp" | |
| 1708 #endif | |
| 1709 #ifdef TARGET_OS_ARCH_linux_sparc | |
| 1710 # include "thread_linux_sparc.hpp" | |
| 1711 #endif | |
| 1712 #ifdef TARGET_OS_ARCH_linux_zero | |
| 1713 # include "thread_linux_zero.hpp" | |
| 1714 #endif | |
| 1715 #ifdef TARGET_OS_ARCH_solaris_x86 | |
| 1716 # include "thread_solaris_x86.hpp" | |
| 1717 #endif | |
| 1718 #ifdef TARGET_OS_ARCH_solaris_sparc | |
| 1719 # include "thread_solaris_sparc.hpp" | |
| 1720 #endif | |
| 1721 #ifdef TARGET_OS_ARCH_windows_x86 | |
| 1722 # include "thread_windows_x86.hpp" | |
| 1723 #endif | |
|
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1724 #ifdef TARGET_OS_ARCH_linux_arm |
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1725 # include "thread_linux_arm.hpp" |
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1726 #endif |
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1727 #ifdef TARGET_OS_ARCH_linux_ppc |
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1728 # include "thread_linux_ppc.hpp" |
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1729 #endif |
| 3960 | 1730 #ifdef TARGET_OS_ARCH_bsd_x86 |
| 1731 # include "thread_bsd_x86.hpp" | |
| 1732 #endif | |
| 1733 #ifdef TARGET_OS_ARCH_bsd_zero | |
| 1734 # include "thread_bsd_zero.hpp" | |
| 1735 #endif | |
| 1972 | 1736 |
| 0 | 1737 |
| 1738 public: | |
| 1739 void set_blocked_on_compilation(bool value) { | |
| 1740 _blocked_on_compilation = value; | |
| 1741 } | |
| 1742 | |
| 1743 bool blocked_on_compilation() { | |
| 1744 return _blocked_on_compilation; | |
| 1745 } | |
| 1746 protected: | |
| 1747 bool _blocked_on_compilation; | |
| 1748 | |
| 1749 | |
| 1750 // JSR166 per-thread parker | |
| 1751 private: | |
| 1752 Parker* _parker; | |
| 1753 public: | |
| 1754 Parker* parker() { return _parker; } | |
| 1755 | |
| 1756 // Biased locking support | |
| 1757 private: | |
| 1758 GrowableArray<MonitorInfo*>* _cached_monitor_info; | |
| 1759 public: | |
| 1760 GrowableArray<MonitorInfo*>* cached_monitor_info() { return _cached_monitor_info; } | |
| 1761 void set_cached_monitor_info(GrowableArray<MonitorInfo*>* info) { _cached_monitor_info = info; } | |
| 1762 | |
| 1763 // clearing/querying jni attach status | |
| 4006 | 1764 bool is_attaching_via_jni() const { return _jni_attach_state == _attaching_via_jni; } |
| 1765 bool has_attached_via_jni() const { return is_attaching_via_jni() || _jni_attach_state == _attached_via_jni; } | |
| 1766 void set_done_attaching_via_jni() { _jni_attach_state = _attached_via_jni; OrderAccess::fence(); } | |
| 342 | 1767 private: |
| 1768 // This field is used to determine if a thread has claimed | |
| 1769 // a par_id: it is -1 if the thread has not claimed a par_id; | |
| 1770 // otherwise its value is the par_id that has been claimed. | |
| 1771 int _claimed_par_id; | |
| 1772 public: | |
| 1773 int get_claimed_par_id() { return _claimed_par_id; } | |
| 1774 void set_claimed_par_id(int id) { _claimed_par_id = id;} | |
| 0 | 1775 }; |
| 1776 | |
| 1777 // Inline implementation of JavaThread::current | |
| 1778 inline JavaThread* JavaThread::current() { | |
| 1779 Thread* thread = ThreadLocalStorage::thread(); | |
| 1780 assert(thread != NULL && thread->is_Java_thread(), "just checking"); | |
| 1781 return (JavaThread*)thread; | |
| 1782 } | |
| 1783 | |
| 1784 inline CompilerThread* JavaThread::as_CompilerThread() { | |
| 1785 assert(is_Compiler_thread(), "just checking"); | |
| 1786 return (CompilerThread*)this; | |
| 1787 } | |
| 1788 | |
|
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1789 inline bool JavaThread::stack_guard_zone_unused() { |
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1790 return _stack_guard_state == stack_guard_unused; |
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1791 } |
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1792 |
| 0 | 1793 inline bool JavaThread::stack_yellow_zone_disabled() { |
| 1794 return _stack_guard_state == stack_guard_yellow_disabled; | |
| 1795 } | |
| 1796 | |
| 1797 inline bool JavaThread::stack_yellow_zone_enabled() { | |
| 1798 #ifdef ASSERT | |
| 1799 if (os::uses_stack_guard_pages()) { | |
| 1800 assert(_stack_guard_state != stack_guard_unused, "guard pages must be in use"); | |
| 1801 } | |
| 1802 #endif | |
| 1803 return _stack_guard_state == stack_guard_enabled; | |
| 1804 } | |
| 1805 | |
| 1806 inline size_t JavaThread::stack_available(address cur_sp) { | |
| 1807 // This code assumes java stacks grow down | |
| 1808 address low_addr; // Limit on the address for deepest stack depth | |
| 1809 if ( _stack_guard_state == stack_guard_unused) { | |
| 1810 low_addr = stack_base() - stack_size(); | |
| 1811 } else { | |
| 1812 low_addr = stack_yellow_zone_base(); | |
| 1813 } | |
| 1814 return cur_sp > low_addr ? cur_sp - low_addr : 0; | |
| 1815 } | |
| 1816 | |
| 1817 // A thread used for Compilation. | |
| 1818 class CompilerThread : public JavaThread { | |
| 1819 friend class VMStructs; | |
| 1820 private: | |
| 1821 CompilerCounters* _counters; | |
| 1822 | |
| 1823 ciEnv* _env; | |
| 1824 CompileLog* _log; | |
| 1825 CompileTask* _task; | |
| 1826 CompileQueue* _queue; | |
| 1827 | |
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1828 |
| 0 | 1829 public: |
| 1830 | |
| 1831 static CompilerThread* current(); | |
| 1832 | |
| 1833 CompilerThread(CompileQueue* queue, CompilerCounters* counters); | |
| 1834 | |
| 1835 bool is_Compiler_thread() const { return true; } | |
| 1836 // Hide this compiler thread from external view. | |
| 1837 bool is_hidden_from_external_view() const { return true; } | |
| 1838 | |
| 1839 CompileQueue* queue() { return _queue; } | |
| 1840 CompilerCounters* counters() { return _counters; } | |
| 1841 | |
| 1842 // Get/set the thread's compilation environment. | |
| 1843 ciEnv* env() { return _env; } | |
| 1844 void set_env(ciEnv* env) { _env = env; } | |
| 1845 | |
| 1846 // Get/set the thread's logging information | |
| 1847 CompileLog* log() { return _log; } | |
| 1848 void init_log(CompileLog* log) { | |
| 1849 // Set once, for good. | |
| 1850 assert(_log == NULL, "set only once"); | |
| 1851 _log = log; | |
| 1852 } | |
| 1853 | |
| 1854 #ifndef PRODUCT | |
| 1855 private: | |
| 1856 IdealGraphPrinter *_ideal_graph_printer; | |
| 1857 public: | |
| 1858 IdealGraphPrinter *ideal_graph_printer() { return _ideal_graph_printer; } | |
| 1859 void set_ideal_graph_printer(IdealGraphPrinter *n) { _ideal_graph_printer = n; } | |
| 1860 #endif | |
| 1861 | |
| 1862 // Get/set the thread's current task | |
| 1863 CompileTask* task() { return _task; } | |
| 1864 void set_task(CompileTask* task) { _task = task; } | |
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1865 |
| 0 | 1866 }; |
| 1867 | |
| 1868 inline CompilerThread* CompilerThread::current() { | |
| 1869 return JavaThread::current()->as_CompilerThread(); | |
| 1870 } | |
| 1871 | |
| 1872 | |
| 1873 // The active thread queue. It also keeps track of the current used | |
| 1874 // thread priorities. | |
| 1875 class Threads: AllStatic { | |
| 1876 friend class VMStructs; | |
| 1877 private: | |
| 1878 static JavaThread* _thread_list; | |
| 1879 static int _number_of_threads; | |
| 1880 static int _number_of_non_daemon_threads; | |
| 1881 static int _return_code; | |
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1882 #ifdef ASSERT |
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1883 static bool _vm_complete; |
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1884 #endif |
| 0 | 1885 |
| 1886 public: | |
| 1887 // Thread management | |
| 1888 // force_daemon is a concession to JNI, where we may need to add a | |
| 1889 // thread to the thread list before allocating its thread object | |
| 1890 static void add(JavaThread* p, bool force_daemon = false); | |
| 1891 static void remove(JavaThread* p); | |
| 1892 static bool includes(JavaThread* p); | |
| 1893 static JavaThread* first() { return _thread_list; } | |
| 1894 static void threads_do(ThreadClosure* tc); | |
| 1895 | |
| 1896 // Initializes the vm and creates the vm thread | |
| 1897 static jint create_vm(JavaVMInitArgs* args, bool* canTryAgain); | |
| 1898 static void convert_vm_init_libraries_to_agents(); | |
| 1899 static void create_vm_init_libraries(); | |
| 1900 static void create_vm_init_agents(); | |
| 1901 static void shutdown_vm_agents(); | |
| 1902 static bool destroy_vm(); | |
| 1903 // Supported VM versions via JNI | |
| 1904 // Includes JNI_VERSION_1_1 | |
| 1905 static jboolean is_supported_jni_version_including_1_1(jint version); | |
| 1906 // Does not include JNI_VERSION_1_1 | |
| 1907 static jboolean is_supported_jni_version(jint version); | |
| 1908 | |
| 1909 // Garbage collection | |
| 1910 static void follow_other_roots(void f(oop*)); | |
| 1911 | |
| 1912 // Apply "f->do_oop" to all root oops in all threads. | |
| 1913 // This version may only be called by sequential code. | |
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1914 static void oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf); |
| 0 | 1915 // This version may be called by sequential or parallel code. |
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1916 static void possibly_parallel_oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf); |
| 0 | 1917 // This creates a list of GCTasks, one per thread. |
| 1918 static void create_thread_roots_tasks(GCTaskQueue* q); | |
| 1919 // This creates a list of GCTasks, one per thread, for marking objects. | |
| 1920 static void create_thread_roots_marking_tasks(GCTaskQueue* q); | |
| 1921 | |
| 1922 // Apply "f->do_oop" to roots in all threads that | |
| 1923 // are part of compiled frames | |
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1924 static void compiled_frame_oops_do(OopClosure* f, CodeBlobClosure* cf); |
| 0 | 1925 |
| 1926 static void convert_hcode_pointers(); | |
| 1927 static void restore_hcode_pointers(); | |
| 1928 | |
| 1929 // Sweeper | |
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1930 static void nmethods_do(CodeBlobClosure* cf); |
| 0 | 1931 |
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1932 // RedefineClasses support |
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1933 static void metadata_do(void f(Metadata*)); |
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1934 |
| 0 | 1935 static void gc_epilogue(); |
| 1936 static void gc_prologue(); | |
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1937 #ifdef ASSERT |
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1938 static bool is_vm_complete() { return _vm_complete; } |
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1939 #endif |
| 0 | 1940 |
| 1941 // Verification | |
| 1942 static void verify(); | |
| 1943 static void print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks); | |
| 1944 static void print(bool print_stacks, bool internal_format) { | |
| 1945 // this function is only used by debug.cpp | |
| 1946 print_on(tty, print_stacks, internal_format, false /* no concurrent lock printed */); | |
| 1947 } | |
| 1948 static void print_on_error(outputStream* st, Thread* current, char* buf, int buflen); | |
| 1949 | |
| 1950 // Get Java threads that are waiting to enter a monitor. If doLock | |
| 1951 // is true, then Threads_lock is grabbed as needed. Otherwise, the | |
| 1952 // VM needs to be at a safepoint. | |
| 1953 static GrowableArray<JavaThread*>* get_pending_threads(int count, | |
| 1954 address monitor, bool doLock); | |
| 1955 | |
| 1956 // Get owning Java thread from the monitor's owner field. If doLock | |
| 1957 // is true, then Threads_lock is grabbed as needed. Otherwise, the | |
| 1958 // VM needs to be at a safepoint. | |
| 1959 static JavaThread *owning_thread_from_monitor_owner(address owner, | |
| 1960 bool doLock); | |
| 1961 | |
| 1962 // Number of threads on the active threads list | |
| 1963 static int number_of_threads() { return _number_of_threads; } | |
| 1964 // Number of non-daemon threads on the active threads list | |
| 1965 static int number_of_non_daemon_threads() { return _number_of_non_daemon_threads; } | |
| 1966 | |
| 1967 // Deoptimizes all frames tied to marked nmethods | |
| 1968 static void deoptimized_wrt_marked_nmethods(); | |
| 1969 | |
| 1970 }; | |
| 1971 | |
| 1972 | |
| 1973 // Thread iterator | |
| 1974 class ThreadClosure: public StackObj { | |
| 1975 public: | |
| 1976 virtual void do_thread(Thread* thread) = 0; | |
| 1977 }; | |
| 1978 | |
| 1979 class SignalHandlerMark: public StackObj { | |
| 1980 private: | |
| 1981 Thread* _thread; | |
| 1982 public: | |
| 1983 SignalHandlerMark(Thread* t) { | |
| 1984 _thread = t; | |
| 1985 if (_thread) _thread->enter_signal_handler(); | |
| 1986 } | |
| 1987 ~SignalHandlerMark() { | |
| 1988 if (_thread) _thread->leave_signal_handler(); | |
| 1989 _thread = NULL; | |
| 1990 } | |
| 1991 }; | |
| 1992 | |
| 1972 | 1993 |
| 1994 #endif // SHARE_VM_RUNTIME_THREAD_HPP |