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src/hotspot/share/compiler/compileBroker.cpp

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   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  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 

  25 #include "cds/cdsConfig.hpp"
  26 #include "classfile/javaClasses.inline.hpp"
  27 #include "classfile/symbolTable.hpp"
  28 #include "classfile/vmClasses.hpp"
  29 #include "classfile/vmSymbols.hpp"

  30 #include "code/codeCache.hpp"
  31 #include "code/codeHeapState.hpp"
  32 #include "code/dependencyContext.hpp"
  33 #include "compiler/compilationLog.hpp"
  34 #include "compiler/compilationMemoryStatistic.hpp"
  35 #include "compiler/compilationPolicy.hpp"
  36 #include "compiler/compileBroker.hpp"
  37 #include "compiler/compileLog.hpp"

  38 #include "compiler/compilerEvent.hpp"
  39 #include "compiler/compilerOracle.hpp"
  40 #include "compiler/directivesParser.hpp"

  41 #include "gc/shared/memAllocator.hpp"
  42 #include "interpreter/linkResolver.hpp"
  43 #include "jfr/jfrEvents.hpp"
  44 #include "jvm.h"
  45 #include "logging/log.hpp"
  46 #include "logging/logStream.hpp"
  47 #include "memory/allocation.inline.hpp"
  48 #include "memory/resourceArea.hpp"
  49 #include "memory/universe.hpp"
  50 #include "oops/method.inline.hpp"
  51 #include "oops/methodData.hpp"
  52 #include "oops/oop.inline.hpp"
  53 #include "prims/jvmtiExport.hpp"
  54 #include "prims/nativeLookup.hpp"
  55 #include "prims/whitebox.hpp"
  56 #include "runtime/atomic.hpp"
  57 #include "runtime/escapeBarrier.hpp"
  58 #include "runtime/globals_extension.hpp"
  59 #include "runtime/handles.inline.hpp"
  60 #include "runtime/init.hpp"
  61 #include "runtime/interfaceSupport.inline.hpp"
  62 #include "runtime/java.hpp"
  63 #include "runtime/javaCalls.hpp"
  64 #include "runtime/jniHandles.inline.hpp"
  65 #include "runtime/os.hpp"
  66 #include "runtime/perfData.hpp"
  67 #include "runtime/safepointVerifiers.hpp"
  68 #include "runtime/sharedRuntime.hpp"
  69 #include "runtime/threads.hpp"
  70 #include "runtime/threadSMR.hpp"
  71 #include "runtime/timerTrace.hpp"
  72 #include "runtime/vframe.inline.hpp"

  73 #include "utilities/debug.hpp"
  74 #include "utilities/dtrace.hpp"
  75 #include "utilities/events.hpp"
  76 #include "utilities/formatBuffer.hpp"
  77 #include "utilities/macros.hpp"

  78 #ifdef COMPILER1
  79 #include "c1/c1_Compiler.hpp"
  80 #endif
  81 #ifdef COMPILER2
  82 #include "opto/c2compiler.hpp"
  83 #endif
  84 #if INCLUDE_JVMCI
  85 #include "jvmci/jvmciEnv.hpp"
  86 #include "jvmci/jvmciRuntime.hpp"
  87 #endif
  88 
  89 #ifdef DTRACE_ENABLED
  90 
  91 // Only bother with this argument setup if dtrace is available
  92 
  93 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)             \
  94   {                                                                      \
  95     Symbol* klass_name = (method)->klass_name();                         \
  96     Symbol* name = (method)->name();                                     \
  97     Symbol* signature = (method)->signature();                           \

 115   }
 116 
 117 #else //  ndef DTRACE_ENABLED
 118 
 119 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
 120 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
 121 
 122 #endif // ndef DTRACE_ENABLED
 123 
 124 bool CompileBroker::_initialized = false;
 125 volatile bool CompileBroker::_should_block = false;
 126 volatile int  CompileBroker::_print_compilation_warning = 0;
 127 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
 128 
 129 // The installed compiler(s)
 130 AbstractCompiler* CompileBroker::_compilers[2];
 131 
 132 // The maximum numbers of compiler threads to be determined during startup.
 133 int CompileBroker::_c1_count = 0;
 134 int CompileBroker::_c2_count = 0;

 135 
 136 // An array of compiler names as Java String objects
 137 jobject* CompileBroker::_compiler1_objects = nullptr;
 138 jobject* CompileBroker::_compiler2_objects = nullptr;

 139 
 140 CompileLog** CompileBroker::_compiler1_logs = nullptr;
 141 CompileLog** CompileBroker::_compiler2_logs = nullptr;

 142 
 143 // These counters are used to assign an unique ID to each compilation.
 144 volatile jint CompileBroker::_compilation_id     = 0;
 145 volatile jint CompileBroker::_osr_compilation_id = 0;
 146 volatile jint CompileBroker::_native_compilation_id = 0;
 147 
 148 // Performance counters
 149 PerfCounter* CompileBroker::_perf_total_compilation = nullptr;
 150 PerfCounter* CompileBroker::_perf_osr_compilation = nullptr;
 151 PerfCounter* CompileBroker::_perf_standard_compilation = nullptr;
 152 
 153 PerfCounter* CompileBroker::_perf_total_bailout_count = nullptr;
 154 PerfCounter* CompileBroker::_perf_total_invalidated_count = nullptr;
 155 PerfCounter* CompileBroker::_perf_total_compile_count = nullptr;
 156 PerfCounter* CompileBroker::_perf_total_osr_compile_count = nullptr;
 157 PerfCounter* CompileBroker::_perf_total_standard_compile_count = nullptr;
 158 
 159 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = nullptr;
 160 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = nullptr;
 161 PerfCounter* CompileBroker::_perf_sum_nmethod_size = nullptr;
 162 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = nullptr;
 163 
 164 PerfStringVariable* CompileBroker::_perf_last_method = nullptr;
 165 PerfStringVariable* CompileBroker::_perf_last_failed_method = nullptr;
 166 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = nullptr;
 167 PerfVariable*       CompileBroker::_perf_last_compile_type = nullptr;
 168 PerfVariable*       CompileBroker::_perf_last_compile_size = nullptr;
 169 PerfVariable*       CompileBroker::_perf_last_failed_type = nullptr;
 170 PerfVariable*       CompileBroker::_perf_last_invalidated_type = nullptr;
 171 
 172 // Timers and counters for generating statistics
 173 elapsedTimer CompileBroker::_t_total_compilation;
 174 elapsedTimer CompileBroker::_t_osr_compilation;
 175 elapsedTimer CompileBroker::_t_standard_compilation;
 176 elapsedTimer CompileBroker::_t_invalidated_compilation;
 177 elapsedTimer CompileBroker::_t_bailedout_compilation;
 178 
 179 uint CompileBroker::_total_bailout_count            = 0;
 180 uint CompileBroker::_total_invalidated_count        = 0;

 181 uint CompileBroker::_total_compile_count            = 0;
 182 uint CompileBroker::_total_osr_compile_count        = 0;
 183 uint CompileBroker::_total_standard_compile_count   = 0;
 184 uint CompileBroker::_total_compiler_stopped_count   = 0;
 185 uint CompileBroker::_total_compiler_restarted_count = 0;
 186 
 187 uint CompileBroker::_sum_osr_bytes_compiled         = 0;
 188 uint CompileBroker::_sum_standard_bytes_compiled    = 0;
 189 uint CompileBroker::_sum_nmethod_size               = 0;
 190 uint CompileBroker::_sum_nmethod_code_size          = 0;
 191 
 192 jlong CompileBroker::_peak_compilation_time        = 0;
 193 
 194 CompilerStatistics CompileBroker::_stats_per_level[CompLevel_full_optimization];


 195 
 196 CompileQueue* CompileBroker::_c2_compile_queue     = nullptr;
 197 CompileQueue* CompileBroker::_c1_compile_queue     = nullptr;


 198 
 199 bool compileBroker_init() {
 200   if (LogEvents) {
 201     CompilationLog::init();
 202   }
 203 
 204   // init directives stack, adding default directive
 205   DirectivesStack::init();
 206 
 207   if (DirectivesParser::has_file()) {
 208     return DirectivesParser::parse_from_flag();
 209   } else if (CompilerDirectivesPrint) {
 210     // Print default directive even when no other was added
 211     DirectivesStack::print(tty);
 212   }
 213 
 214   return true;
 215 }
 216 
 217 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
 218   CompilerThread* thread = CompilerThread::current();
 219   thread->set_task(task);
 220   CompileLog*     log  = thread->log();
 221   thread->timeout()->arm();
 222   if (log != nullptr && !task->is_unloaded())  task->log_task_start(log);
 223 }
 224 
 225 CompileTaskWrapper::~CompileTaskWrapper() {
 226   CompilerThread* thread = CompilerThread::current();
 227   CompileTask* task = thread->task();
 228   CompileLog*  log  = thread->log();

 229   if (log != nullptr && !task->is_unloaded())  task->log_task_done(log);
 230   thread->set_task(nullptr);
 231   thread->set_env(nullptr);
 232   thread->timeout()->disarm();
 233   if (task->is_blocking()) {
 234     bool free_task = false;
 235     {
 236       MutexLocker notifier(thread, CompileTaskWait_lock);
 237       task->mark_complete();
 238 #if INCLUDE_JVMCI
 239       if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
 240         if (!task->has_waiter()) {
 241           // The waiting thread timed out and thus did not delete the task.
 242           free_task = true;
 243         }
 244         task->set_blocking_jvmci_compile_state(nullptr);
 245       }
 246 #endif
 247       if (!free_task) {
 248         // Notify the waiting thread that the compilation has completed
 249         // so that it can free the task.
 250         CompileTaskWait_lock->notify_all();
 251       }
 252     }
 253     if (free_task) {
 254       // The task can only be deleted once the task lock is released.
 255       delete task;
 256     }
 257   } else {
 258     task->mark_complete();
 259 
 260     // By convention, the compiling thread is responsible for deleting
 261     // a non-blocking CompileTask.
 262     delete task;
 263   }
 264 }
 265 
 266 /**
 267  * Check if a CompilerThread can be removed and update count if requested.
 268  */
 269 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
 270   assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
 271   if (!ReduceNumberOfCompilerThreads) return false;
 272 


 273   AbstractCompiler *compiler = ct->compiler();
 274   int compiler_count = compiler->num_compiler_threads();
 275   bool c1 = compiler->is_c1();
 276 
 277   // Keep at least 1 compiler thread of each type.
 278   if (compiler_count < 2) return false;
 279 
 280   // Keep thread alive for at least some time.
 281   if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
 282 
 283 #if INCLUDE_JVMCI
 284   if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
 285     // Handles for JVMCI thread objects may get released concurrently.
 286     if (do_it) {
 287       assert(CompileThread_lock->owner() == ct, "must be holding lock");
 288     } else {
 289       // Skip check if it's the last thread and let caller check again.
 290       return true;
 291     }
 292   }

 299     if (do_it) {
 300       assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
 301       compiler->set_num_compiler_threads(compiler_count - 1);
 302 #if INCLUDE_JVMCI
 303       if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
 304         // Old j.l.Thread object can die when no longer referenced elsewhere.
 305         JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
 306         _compiler2_objects[compiler_count - 1] = nullptr;
 307       }
 308 #endif
 309     }
 310     return true;
 311   }
 312   return false;
 313 }
 314 
 315 /**
 316  * Add a CompileTask to a CompileQueue.
 317  */
 318 void CompileQueue::add(CompileTask* task) {
 319   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 320 
 321   task->set_next(nullptr);
 322   task->set_prev(nullptr);
 323 
 324   if (_last == nullptr) {
 325     // The compile queue is empty.
 326     assert(_first == nullptr, "queue is empty");
 327     _first = task;
 328     _last = task;
 329   } else {
 330     // Append the task to the queue.
 331     assert(_last->next() == nullptr, "not last");
 332     _last->set_next(task);
 333     task->set_prev(_last);
 334     _last = task;
 335   }
 336   ++_size;
 337   ++_total_added;
 338   if (_size > _peak_size) {
 339     _peak_size = _size;
 340   }
 341 
 342   // Mark the method as being in the compile queue.
 343   task->method()->set_queued_for_compilation();
 344 


 345   if (CIPrintCompileQueue) {
 346     print_tty();
 347   }
 348 
 349   if (LogCompilation && xtty != nullptr) {
 350     task->log_task_queued();
 351   }
 352 
 353   if (TrainingData::need_data() && !CDSConfig::is_dumping_final_static_archive()) {
 354     CompileTrainingData* ctd = CompileTrainingData::make(task);
 355     if (ctd != nullptr) {
 356       task->set_training_data(ctd);
 357     }
 358   }
 359 
 360   // Notify CompilerThreads that a task is available.
 361   MethodCompileQueue_lock->notify_all();














































 362 }
 363 
 364 /**
 365  * Empties compilation queue by deleting all compilation tasks.
 366  * Furthermore, the method wakes up all threads that are waiting
 367  * on a compilation task to finish. This can happen if background
 368  * compilation is disabled.
 369  */
 370 void CompileQueue::delete_all() {
 371   MutexLocker mu(MethodCompileQueue_lock);


 372   CompileTask* current = _first;
 373 
 374   // Iterate over all tasks in the compile queue
 375   while (current != nullptr) {
 376     CompileTask* next = current->next();
 377     if (!current->is_blocking()) {
 378       // Non-blocking task. No one is waiting for it, delete it now.
 379       delete current;
 380     } else {
 381       // Blocking task. By convention, it is the waiters responsibility
 382       // to delete the task. We cannot delete it here, because we do not
 383       // coordinate with waiters. We will notify the waiters later.
 384     }
 385     current = next;
 386   }
 387   _first = nullptr;
 388   _last = nullptr;
 389 
 390   // Wake up all blocking task waiters to deal with remaining blocking
 391   // tasks. This is not a performance sensitive path, so we do this
 392   // unconditionally to simplify coding/testing.
 393   {
 394     MonitorLocker ml(Thread::current(), CompileTaskWait_lock);
 395     ml.notify_all();
 396   }
 397 
 398   // Wake up all threads that block on the queue.
 399   MethodCompileQueue_lock->notify_all();
 400 }
 401 
 402 /**
 403  * Get the next CompileTask from a CompileQueue
 404  */
 405 CompileTask* CompileQueue::get(CompilerThread* thread) {
 406   // save methods from RedefineClasses across safepoint
 407   // across MethodCompileQueue_lock below.
 408   methodHandle save_method;
 409 
 410   MonitorLocker locker(MethodCompileQueue_lock);




 411   // If _first is null we have no more compile jobs. There are two reasons for
 412   // having no compile jobs: First, we compiled everything we wanted. Second,
 413   // we ran out of code cache so compilation has been disabled. In the latter
 414   // case we perform code cache sweeps to free memory such that we can re-enable
 415   // compilation.
 416   while (_first == nullptr) {
 417     // Exit loop if compilation is disabled forever
 418     if (CompileBroker::is_compilation_disabled_forever()) {
 419       return nullptr;
 420     }
 421 
 422     AbstractCompiler* compiler = thread->compiler();
 423     guarantee(compiler != nullptr, "Compiler object must exist");
 424     compiler->on_empty_queue(this, thread);
 425     if (_first != nullptr) {
 426       // The call to on_empty_queue may have temporarily unlocked the MCQ lock
 427       // so check again whether any tasks were added to the queue.
 428       break;
 429     }
 430 
















 431     // If there are no compilation tasks and we can compile new jobs
 432     // (i.e., there is enough free space in the code cache) there is
 433     // no need to invoke the GC.
 434     // We need a timed wait here, since compiler threads can exit if compilation
 435     // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
 436     // is not critical and we do not want idle compiler threads to wake up too often.
 437     locker.wait(5*1000);
 438 




 439     if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
 440       // Still nothing to compile. Give caller a chance to stop this thread.
 441       if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
 442     }
 443   }
 444 
 445   if (CompileBroker::is_compilation_disabled_forever()) {
 446     return nullptr;
 447   }
 448 
 449   CompileTask* task;
 450   {
 451     NoSafepointVerifier nsv;
 452     task = CompilationPolicy::select_task(this, thread);
 453     if (task != nullptr) {
 454       task = task->select_for_compilation();
 455     }
 456   }
 457 
 458   if (task != nullptr) {
 459     // Save method pointers across unlock safepoint.  The task is removed from
 460     // the compilation queue, which is walked during RedefineClasses.
 461     Thread* thread = Thread::current();
 462     save_method = methodHandle(thread, task->method());
 463 
 464     remove(task);
 465   }
 466   purge_stale_tasks(); // may temporarily release MCQ lock
 467   return task;
 468 }
 469 
 470 // Clean & deallocate stale compile tasks.
 471 // Temporarily releases MethodCompileQueue lock.
 472 void CompileQueue::purge_stale_tasks() {
 473   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 474   if (_first_stale != nullptr) {
 475     // Stale tasks are purged when MCQ lock is released,
 476     // but _first_stale updates are protected by MCQ lock.
 477     // Once task processing starts and MCQ lock is released,
 478     // other compiler threads can reuse _first_stale.
 479     CompileTask* head = _first_stale;
 480     _first_stale = nullptr;
 481     {
 482       MutexUnlocker ul(MethodCompileQueue_lock);
 483       for (CompileTask* task = head; task != nullptr; ) {
 484         CompileTask* next_task = task->next();
 485         task->set_next(nullptr);
 486         CompileTaskWrapper ctw(task); // Frees the task
 487         task->set_failure_reason("stale task");
 488         task = next_task;
 489       }
 490     }

 491   }
 492 }
 493 
 494 void CompileQueue::remove(CompileTask* task) {
 495   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 496   if (task->prev() != nullptr) {
 497     task->prev()->set_next(task->next());
 498   } else {
 499     // max is the first element
 500     assert(task == _first, "Sanity");
 501     _first = task->next();
 502   }
 503 
 504   if (task->next() != nullptr) {
 505     task->next()->set_prev(task->prev());
 506   } else {
 507     // max is the last element
 508     assert(task == _last, "Sanity");
 509     _last = task->prev();
 510   }
 511   task->set_next(nullptr);
 512   task->set_prev(nullptr);
 513   --_size;
 514   ++_total_removed;
 515 }
 516 
 517 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
 518   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 519   remove(task);
 520 
 521   // Enqueue the task for reclamation (should be done outside MCQ lock)
 522   task->set_next(_first_stale);
 523   task->set_prev(nullptr);
 524   _first_stale = task;
 525 }
 526 
 527 // methods in the compile queue need to be marked as used on the stack
 528 // so that they don't get reclaimed by Redefine Classes
 529 void CompileQueue::mark_on_stack() {
 530   CompileTask* task = _first;
 531   while (task != nullptr) {



 532     task->mark_on_stack();
 533     task = task->next();
 534   }
 535 }
 536 
 537 
 538 CompileQueue* CompileBroker::compile_queue(int comp_level) {
 539   if (is_c2_compile(comp_level)) return _c2_compile_queue;
 540   if (is_c1_compile(comp_level)) return _c1_compile_queue;
 541   return nullptr;
 542 }
 543 
 544 CompileQueue* CompileBroker::c1_compile_queue() {
 545   return _c1_compile_queue;
 546 }
 547 
 548 CompileQueue* CompileBroker::c2_compile_queue() {
 549   return _c2_compile_queue;
 550 }
 551 
 552 void CompileBroker::print_compile_queues(outputStream* st) {
 553   st->print_cr("Current compiles: ");
 554 
 555   char buf[2000];
 556   int buflen = sizeof(buf);
 557   Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
 558 
 559   st->cr();
 560   if (_c1_compile_queue != nullptr) {
 561     _c1_compile_queue->print(st);
 562   }
 563   if (_c2_compile_queue != nullptr) {
 564     _c2_compile_queue->print(st);
 565   }






 566 }
 567 
 568 void CompileQueue::print(outputStream* st) {
 569   assert_locked_or_safepoint(MethodCompileQueue_lock);
 570   st->print_cr("%s:", name());
 571   CompileTask* task = _first;
 572   if (task == nullptr) {
 573     st->print_cr("Empty");
 574   } else {
 575     while (task != nullptr) {
 576       task->print(st, nullptr, true, true);
 577       task = task->next();
 578     }
 579   }
 580   st->cr();
 581 }
 582 
 583 void CompileQueue::print_tty() {
 584   stringStream ss;
 585   // Dump the compile queue into a buffer before locking the tty
 586   print(&ss);
 587   {
 588     ttyLocker ttyl;
 589     tty->print("%s", ss.freeze());

 616       CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
 617     }
 618     first_registration = false;
 619 #endif // COMPILER2
 620   }
 621 }
 622 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
 623 
 624 // ------------------------------------------------------------------
 625 // CompileBroker::compilation_init
 626 //
 627 // Initialize the Compilation object
 628 void CompileBroker::compilation_init(JavaThread* THREAD) {
 629   // No need to initialize compilation system if we do not use it.
 630   if (!UseCompiler) {
 631     return;
 632   }
 633   // Set the interface to the current compiler(s).
 634   _c1_count = CompilationPolicy::c1_count();
 635   _c2_count = CompilationPolicy::c2_count();

 636 
 637 #if INCLUDE_JVMCI
 638   if (EnableJVMCI) {
 639     // This is creating a JVMCICompiler singleton.
 640     JVMCICompiler* jvmci = new JVMCICompiler();
 641 
 642     if (UseJVMCICompiler) {
 643       _compilers[1] = jvmci;
 644       if (FLAG_IS_DEFAULT(JVMCIThreads)) {
 645         if (BootstrapJVMCI) {
 646           // JVMCI will bootstrap so give it more threads
 647           _c2_count = MIN2(32, os::active_processor_count());
 648         }
 649       } else {
 650         _c2_count = JVMCIThreads;
 651       }
 652       if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
 653       } else {
 654 #ifdef COMPILER1
 655         _c1_count = JVMCIHostThreads;

 772     _perf_last_compile_size =
 773              PerfDataManager::create_variable(SUN_CI, "lastSize",
 774                                               PerfData::U_Bytes,
 775                                               (jlong)CompileBroker::no_compile,
 776                                               CHECK);
 777 
 778 
 779     _perf_last_failed_type =
 780              PerfDataManager::create_variable(SUN_CI, "lastFailedType",
 781                                               PerfData::U_None,
 782                                               (jlong)CompileBroker::no_compile,
 783                                               CHECK);
 784 
 785     _perf_last_invalidated_type =
 786          PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
 787                                           PerfData::U_None,
 788                                           (jlong)CompileBroker::no_compile,
 789                                           CHECK);
 790   }
 791 

 792   _initialized = true;
 793 }
 794 





 795 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
 796   CompilationPolicy::replay_training_at_init_loop(thread);
 797 }
 798 
 799 #if defined(ASSERT) && COMPILER2_OR_JVMCI
 800 // Entry for DeoptimizeObjectsALotThread. The threads are started in
 801 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
 802 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
 803     DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
 804     bool enter_single_loop;
 805     {
 806       MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
 807       static int single_thread_count = 0;
 808       enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
 809     }
 810     if (enter_single_loop) {
 811       dt->deoptimize_objects_alot_loop_single();
 812     } else {
 813       dt->deoptimize_objects_alot_loop_all();
 814     }

 938 }
 939 
 940 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
 941   char name_buffer[256];
 942   os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
 943   Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
 944   return JNIHandles::make_global(thread_oop);
 945 }
 946 
 947 static void print_compiler_threads(stringStream& msg) {
 948   if (TraceCompilerThreads) {
 949     tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
 950   }
 951   LogTarget(Debug, jit, thread) lt;
 952   if (lt.is_enabled()) {
 953     LogStream ls(lt);
 954     ls.print_cr("%s", msg.as_string());
 955   }
 956 }
 957 











 958 void CompileBroker::init_compiler_threads() {
 959   // Ensure any exceptions lead to vm_exit_during_initialization.
 960   EXCEPTION_MARK;
 961 #if !defined(ZERO)
 962   assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
 963 #endif // !ZERO
 964   // Initialize the compilation queue
 965   if (_c2_count > 0) {
 966     const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
 967     _c2_compile_queue  = new CompileQueue(name);
 968     _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
 969     _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
 970   }
 971   if (_c1_count > 0) {
 972     _c1_compile_queue  = new CompileQueue("C1 compile queue");
 973     _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
 974     _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
 975   }
 976 












 977   for (int i = 0; i < _c2_count; i++) {
 978     // Create a name for our thread.
 979     jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
 980     _compiler2_objects[i] = thread_handle;
 981     _compiler2_logs[i] = nullptr;
 982 
 983     if (!UseDynamicNumberOfCompilerThreads || i == 0) {
 984       JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
 985       assert(ct != nullptr, "should have been handled for initial thread");
 986       _compilers[1]->set_num_compiler_threads(i + 1);
 987       if (trace_compiler_threads()) {
 988         ResourceMark rm;
 989         ThreadsListHandle tlh;  // name() depends on the TLH.
 990         assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
 991         stringStream msg;
 992         msg.print("Added initial compiler thread %s", ct->name());
 993         print_compiler_threads(msg);
 994       }
 995     }
 996   }
 997 
 998   for (int i = 0; i < _c1_count; i++) {
 999     // Create a name for our thread.
1000     jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1001     _compiler1_objects[i] = thread_handle;
1002     _compiler1_logs[i] = nullptr;
1003 
1004     if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1005       JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1006       assert(ct != nullptr, "should have been handled for initial thread");
1007       _compilers[0]->set_num_compiler_threads(i + 1);
1008       if (trace_compiler_threads()) {
1009         ResourceMark rm;
1010         ThreadsListHandle tlh;  // name() depends on the TLH.
1011         assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1012         stringStream msg;
1013         msg.print("Added initial compiler thread %s", ct->name());
1014         print_compiler_threads(msg);
1015       }




















1016     }
1017   }
1018 
1019   if (UsePerfData) {
1020     PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
1021   }
1022 
1023 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1024   if (DeoptimizeObjectsALot) {
1025     // Initialize and start the object deoptimizer threads
1026     const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1027     for (int count = 0; count < total_count; count++) {
1028       Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1029       jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1030       make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1031     }
1032   }
1033 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1034 }
1035 
1036 void CompileBroker::init_training_replay() {
1037   // Ensure any exceptions lead to vm_exit_during_initialization.
1038   EXCEPTION_MARK;
1039   if (TrainingData::have_data()) {
1040     Handle thread_oop = JavaThread::create_system_thread_object("Training replay thread", CHECK);
1041     jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1042     make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1043   }
1044 }
1045 
1046 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1047 
1048   int old_c2_count = 0, new_c2_count = 0, old_c1_count = 0, new_c1_count = 0;
1049   const int c2_tasks_per_thread = 2, c1_tasks_per_thread = 4;
1050 
1051   // Quick check if we already have enough compiler threads without taking the lock.
1052   // Numbers may change concurrently, so we read them again after we have the lock.
1053   if (_c2_compile_queue != nullptr) {
1054     old_c2_count = get_c2_thread_count();
1055     new_c2_count = MIN2(_c2_count, _c2_compile_queue->size() / c2_tasks_per_thread);
1056   }
1057   if (_c1_compile_queue != nullptr) {
1058     old_c1_count = get_c1_thread_count();
1059     new_c1_count = MIN2(_c1_count, _c1_compile_queue->size() / c1_tasks_per_thread);
1060   }

1156   }
1157 
1158   CompileThread_lock->unlock();
1159 }
1160 
1161 
1162 /**
1163  * Set the methods on the stack as on_stack so that redefine classes doesn't
1164  * reclaim them. This method is executed at a safepoint.
1165  */
1166 void CompileBroker::mark_on_stack() {
1167   assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1168   // Since we are at a safepoint, we do not need a lock to access
1169   // the compile queues.
1170   if (_c2_compile_queue != nullptr) {
1171     _c2_compile_queue->mark_on_stack();
1172   }
1173   if (_c1_compile_queue != nullptr) {
1174     _c1_compile_queue->mark_on_stack();
1175   }






1176 }
1177 
1178 // ------------------------------------------------------------------
1179 // CompileBroker::compile_method
1180 //
1181 // Request compilation of a method.
1182 void CompileBroker::compile_method_base(const methodHandle& method,
1183                                         int osr_bci,
1184                                         int comp_level,
1185                                         int hot_count,
1186                                         CompileTask::CompileReason compile_reason,

1187                                         bool blocking,
1188                                         Thread* thread) {
1189   guarantee(!method->is_abstract(), "cannot compile abstract methods");
1190   assert(method->method_holder()->is_instance_klass(),
1191          "sanity check");
1192   assert(!method->method_holder()->is_not_initialized(),
1193          "method holder must be initialized");


1194   assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1195 
1196   if (CIPrintRequests) {
1197     tty->print("request: ");
1198     method->print_short_name(tty);
1199     if (osr_bci != InvocationEntryBci) {
1200       tty->print(" osr_bci: %d", osr_bci);
1201     }
1202     tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1203     if (hot_count > 0) {
1204       tty->print(" hot: yes");
1205     }
1206     tty->cr();
1207   }
1208 
1209   // A request has been made for compilation.  Before we do any
1210   // real work, check to see if the method has been compiled
1211   // in the meantime with a definitive result.
1212   if (compilation_is_complete(method, osr_bci, comp_level)) {
1213     return;
1214   }
1215 
1216 #ifndef PRODUCT
1217   if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1218     if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1219       // Positive OSROnlyBCI means only compile that bci.  Negative means don't compile that BCI.
1220       return;
1221     }
1222   }
1223 #endif
1224 
1225   // If this method is already in the compile queue, then
1226   // we do not block the current thread.
1227   if (compilation_is_in_queue(method)) {
1228     // We may want to decay our counter a bit here to prevent
1229     // multiple denied requests for compilation.  This is an
1230     // open compilation policy issue. Note: The other possibility,
1231     // in the case that this is a blocking compile request, is to have
1232     // all subsequent blocking requesters wait for completion of
1233     // ongoing compiles. Note that in this case we'll need a protocol
1234     // for freeing the associated compile tasks. [Or we could have
1235     // a single static monitor on which all these waiters sleep.]
1236     return;
1237   }
1238 
1239   // Tiered policy requires MethodCounters to exist before adding a method to
1240   // the queue. Create if we don't have them yet.
1241   method->get_method_counters(thread);





1242 
1243   // Outputs from the following MutexLocker block:
1244   CompileTask* task     = nullptr;
1245   CompileQueue* queue  = compile_queue(comp_level);
1246 
1247   // Acquire our lock.
1248   {
1249     MutexLocker locker(thread, MethodCompileQueue_lock);
1250 
1251     // Make sure the method has not slipped into the queues since
1252     // last we checked; note that those checks were "fast bail-outs".
1253     // Here we need to be more careful, see 14012000 below.
1254     if (compilation_is_in_queue(method)) {
1255       return;
1256     }
1257 
1258     // We need to check again to see if the compilation has
1259     // completed.  A previous compilation may have registered
1260     // some result.
1261     if (compilation_is_complete(method, osr_bci, comp_level)) {
1262       return;
1263     }
1264 
1265     // We now know that this compilation is not pending, complete,
1266     // or prohibited.  Assign a compile_id to this compilation
1267     // and check to see if it is in our [Start..Stop) range.
1268     int compile_id = assign_compile_id(method, osr_bci);
1269     if (compile_id == 0) {
1270       // The compilation falls outside the allowed range.
1271       return;
1272     }
1273 
1274 #if INCLUDE_JVMCI
1275     if (UseJVMCICompiler && blocking) {
1276       // Don't allow blocking compiles for requests triggered by JVMCI.
1277       if (thread->is_Compiler_thread()) {
1278         blocking = false;
1279       }
1280 
1281       // In libjvmci, JVMCI initialization should not deadlock with other threads

1331     // <RESULT, QUEUE> :
1332     //     <0, 1> : in compile queue, but not yet compiled
1333     //     <1, 1> : compiled but queue bit not cleared
1334     //     <1, 0> : compiled and queue bit cleared
1335     // Because we first check the queue bits then check the result bits,
1336     // we are assured that we cannot introduce a duplicate task.
1337     // Note that if we did the tests in the reverse order (i.e. check
1338     // result then check queued bit), we could get the result bit before
1339     // the compilation completed, and the queue bit after the compilation
1340     // completed, and end up introducing a "duplicate" (redundant) task.
1341     // In that case, the compiler thread should first check if a method
1342     // has already been compiled before trying to compile it.
1343     // NOTE: in the event that there are multiple compiler threads and
1344     // there is de-optimization/recompilation, things will get hairy,
1345     // and in that case it's best to protect both the testing (here) of
1346     // these bits, and their updating (here and elsewhere) under a
1347     // common lock.
1348     task = create_compile_task(queue,
1349                                compile_id, method,
1350                                osr_bci, comp_level,
1351                                hot_count, compile_reason,
1352                                blocking);












1353   }
1354 
1355   if (blocking) {
1356     wait_for_completion(task);
1357   }
1358 }
1359 



















1360 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1361                                        int comp_level,
1362                                        int hot_count,

1363                                        CompileTask::CompileReason compile_reason,
1364                                        TRAPS) {
1365   // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1366   if (!_initialized || comp_level == CompLevel_none) {
1367     return nullptr;
1368   }
1369 







1370   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1371   assert(comp != nullptr, "Ensure we have a compiler");
1372 
1373 #if INCLUDE_JVMCI
1374   if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1375     // JVMCI compilation is not yet initializable.
1376     return nullptr;
1377   }
1378 #endif
1379 
1380   DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1381   // CompileBroker::compile_method can trap and can have pending async exception.
1382   nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_count, compile_reason, directive, THREAD);
1383   DirectivesStack::release(directive);
1384   return nm;
1385 }
1386 
1387 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1388                                          int comp_level,
1389                                          int hot_count,

1390                                          CompileTask::CompileReason compile_reason,
1391                                          DirectiveSet* directive,
1392                                          TRAPS) {
1393 
1394   // make sure arguments make sense
1395   assert(method->method_holder()->is_instance_klass(), "not an instance method");
1396   assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1397   assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1398   assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");



1399   // return quickly if possible






1400 
1401   // lock, make sure that the compilation
1402   // isn't prohibited in a straightforward way.
1403   AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1404   if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1405     return nullptr;
1406   }
1407 
1408   if (osr_bci == InvocationEntryBci) {
1409     // standard compilation
1410     nmethod* method_code = method->code();
1411     if (method_code != nullptr) {
1412       if (compilation_is_complete(method, osr_bci, comp_level)) {
1413         return method_code;
1414       }
1415     }
1416     if (method->is_not_compilable(comp_level)) {
1417       return nullptr;
1418     }
1419   } else {
1420     // osr compilation
1421     // We accept a higher level osr method
1422     nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1423     if (nm != nullptr) return nm;
1424     if (method->is_not_osr_compilable(comp_level)) return nullptr;
1425   }
1426 
1427   assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1428   // some prerequisites that are compiler specific
1429   if (comp->is_c2() || comp->is_jvmci()) {


1430     InternalOOMEMark iom(THREAD);
1431     method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1432     // Resolve all classes seen in the signature of the method
1433     // we are compiling.
1434     Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1435   }
1436 
1437   // If the method is native, do the lookup in the thread requesting
1438   // the compilation. Native lookups can load code, which is not
1439   // permitted during compilation.
1440   //
1441   // Note: A native method implies non-osr compilation which is
1442   //       checked with an assertion at the entry of this method.
1443   if (method->is_native() && !method->is_method_handle_intrinsic()) {
1444     address adr = NativeLookup::lookup(method, THREAD);
1445     if (HAS_PENDING_EXCEPTION) {
1446       // In case of an exception looking up the method, we just forget
1447       // about it. The interpreter will kick-in and throw the exception.
1448       method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1449       CLEAR_PENDING_EXCEPTION;

1464   }
1465 
1466   // do the compilation
1467   if (method->is_native()) {
1468     if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1469       // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1470       // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1471       //
1472       // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1473       // in this case.  If we can't generate one and use it we can not execute the out-of-line method handle calls.
1474       AdapterHandlerLibrary::create_native_wrapper(method);
1475     } else {
1476       return nullptr;
1477     }
1478   } else {
1479     // If the compiler is shut off due to code cache getting full
1480     // fail out now so blocking compiles dont hang the java thread
1481     if (!should_compile_new_jobs()) {
1482       return nullptr;
1483     }
1484     bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles;
1485     compile_method_base(method, osr_bci, comp_level, hot_count, compile_reason, is_blocking, THREAD);


1486   }
1487 
1488   // return requested nmethod
1489   // We accept a higher level osr method
1490   if (osr_bci == InvocationEntryBci) {
1491     return method->code();
1492   }
1493   return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1494 }
1495 
1496 
1497 // ------------------------------------------------------------------
1498 // CompileBroker::compilation_is_complete
1499 //
1500 // See if compilation of this method is already complete.
1501 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1502                                             int                 osr_bci,
1503                                             int                 comp_level) {






1504   bool is_osr = (osr_bci != standard_entry_bci);
1505   if (is_osr) {
1506     if (method->is_not_osr_compilable(comp_level)) {
1507       return true;
1508     } else {
1509       nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1510       return (result != nullptr);
1511     }
1512   } else {
1513     if (method->is_not_compilable(comp_level)) {
1514       return true;
1515     } else {
1516       nmethod* result = method->code();
1517       if (result == nullptr) return false;
1518       return comp_level == result->comp_level();









1519     }
1520   }
1521 }
1522 
1523 
1524 /**
1525  * See if this compilation is already requested.
1526  *
1527  * Implementation note: there is only a single "is in queue" bit
1528  * for each method.  This means that the check below is overly
1529  * conservative in the sense that an osr compilation in the queue
1530  * will block a normal compilation from entering the queue (and vice
1531  * versa).  This can be remedied by a full queue search to disambiguate
1532  * cases.  If it is deemed profitable, this may be done.
1533  */
1534 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1535   return method->queued_for_compilation();
1536 }
1537 
1538 // ------------------------------------------------------------------

1598     if (CIStart <= id && id < CIStop) {
1599       return id;
1600     }
1601   }
1602 
1603   // Method was not in the appropriate compilation range.
1604   method->set_not_compilable_quietly("Not in requested compile id range");
1605   return 0;
1606 #else
1607   // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1608   // only _compilation_id is incremented.
1609   return Atomic::add(&_compilation_id, 1);
1610 #endif
1611 }
1612 
1613 // ------------------------------------------------------------------
1614 // CompileBroker::assign_compile_id_unlocked
1615 //
1616 // Public wrapper for assign_compile_id that acquires the needed locks
1617 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1618   MutexLocker locker(thread, MethodCompileQueue_lock);
1619   return assign_compile_id(method, osr_bci);
1620 }
1621 
1622 // ------------------------------------------------------------------
1623 // CompileBroker::create_compile_task
1624 //
1625 // Create a CompileTask object representing the current request for
1626 // compilation.  Add this task to the queue.
1627 CompileTask* CompileBroker::create_compile_task(CompileQueue*       queue,
1628                                                 int                 compile_id,
1629                                                 const methodHandle& method,
1630                                                 int                 osr_bci,
1631                                                 int                 comp_level,
1632                                                 int                 hot_count,

1633                                                 CompileTask::CompileReason compile_reason,

1634                                                 bool                blocking) {
1635   CompileTask* new_task = new CompileTask(compile_id, method, osr_bci, comp_level,
1636                                           hot_count, compile_reason, blocking);
1637   queue->add(new_task);
1638   return new_task;
1639 }
1640 
1641 #if INCLUDE_JVMCI
1642 // The number of milliseconds to wait before checking if
1643 // JVMCI compilation has made progress.
1644 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1645 
1646 // The number of JVMCI compilation progress checks that must fail
1647 // before unblocking a thread waiting for a blocking compilation.
1648 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1649 
1650 /**
1651  * Waits for a JVMCI compiler to complete a given task. This thread
1652  * waits until either the task completes or it sees no JVMCI compilation
1653  * progress for N consecutive milliseconds where N is
1654  * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1655  * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1656  *
1657  * @return true if this thread needs to delete the task

1771  * compiler threads can start compiling.
1772  */
1773 bool CompileBroker::init_compiler_runtime() {
1774   CompilerThread* thread = CompilerThread::current();
1775   AbstractCompiler* comp = thread->compiler();
1776   // Final sanity check - the compiler object must exist
1777   guarantee(comp != nullptr, "Compiler object must exist");
1778 
1779   {
1780     // Must switch to native to allocate ci_env
1781     ThreadToNativeFromVM ttn(thread);
1782     ciEnv ci_env((CompileTask*)nullptr);
1783     // Cache Jvmti state
1784     ci_env.cache_jvmti_state();
1785     // Cache DTrace flags
1786     ci_env.cache_dtrace_flags();
1787 
1788     // Switch back to VM state to do compiler initialization
1789     ThreadInVMfromNative tv(thread);
1790 
1791     // Perform per-thread and global initializations
1792     comp->initialize();
1793   }
1794 
1795   if (comp->is_failed()) {
1796     disable_compilation_forever();
1797     // If compiler initialization failed, no compiler thread that is specific to a
1798     // particular compiler runtime will ever start to compile methods.
1799     shutdown_compiler_runtime(comp, thread);
1800     return false;
1801   }
1802 
1803   // C1 specific check
1804   if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
1805     warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1806     return false;
1807   }
1808 
1809   return true;
1810 }
1811 
1812 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
1813   BufferBlob* blob = thread->get_buffer_blob();
1814   if (blob != nullptr) {
1815     blob->purge();
1816     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1817     CodeCache::free(blob);
1818   }
1819 }
1820 
1821 /**
1822  * If C1 and/or C2 initialization failed, we shut down all compilation.
1823  * We do this to keep things simple. This can be changed if it ever turns
1824  * out to be a problem.
1825  */
1826 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1827   free_buffer_blob_if_allocated(thread);
1828 


1829   if (comp->should_perform_shutdown()) {
1830     // There are two reasons for shutting down the compiler
1831     // 1) compiler runtime initialization failed
1832     // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1833     warning("%s initialization failed. Shutting down all compilers", comp->name());
1834 
1835     // Only one thread per compiler runtime object enters here
1836     // Set state to shut down
1837     comp->set_shut_down();
1838 
1839     // Delete all queued compilation tasks to make compiler threads exit faster.
1840     if (_c1_compile_queue != nullptr) {
1841       _c1_compile_queue->delete_all();
1842     }
1843 
1844     if (_c2_compile_queue != nullptr) {
1845       _c2_compile_queue->delete_all();
1846     }
1847 
1848     // Set flags so that we continue execution with using interpreter only.

1852     // We could delete compiler runtimes also. However, there are references to
1853     // the compiler runtime(s) (e.g.,  nmethod::is_compiled_by_c1()) which then
1854     // fail. This can be done later if necessary.
1855   }
1856 }
1857 
1858 /**
1859  * Helper function to create new or reuse old CompileLog.
1860  */
1861 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1862   if (!LogCompilation) return nullptr;
1863 
1864   AbstractCompiler *compiler = ct->compiler();
1865   bool c1 = compiler->is_c1();
1866   jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1867   assert(compiler_objects != nullptr, "must be initialized at this point");
1868   CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1869   assert(logs != nullptr, "must be initialized at this point");
1870   int count = c1 ? _c1_count : _c2_count;
1871 





1872   // Find Compiler number by its threadObj.
1873   oop compiler_obj = ct->threadObj();
1874   int compiler_number = 0;
1875   bool found = false;
1876   for (; compiler_number < count; compiler_number++) {
1877     if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
1878       found = true;
1879       break;
1880     }
1881   }
1882   assert(found, "Compiler must exist at this point");
1883 
1884   // Determine pointer for this thread's log.
1885   CompileLog** log_ptr = &logs[compiler_number];
1886 
1887   // Return old one if it exists.
1888   CompileLog* log = *log_ptr;
1889   if (log != nullptr) {
1890     ct->init_log(log);
1891     return log;

1933   if (!thread->init_compilation_timeout()) {
1934     return;
1935   }
1936 
1937   // If compiler thread/runtime initialization fails, exit the compiler thread
1938   if (!init_compiler_runtime()) {
1939     return;
1940   }
1941 
1942   thread->start_idle_timer();
1943 
1944   // Poll for new compilation tasks as long as the JVM runs. Compilation
1945   // should only be disabled if something went wrong while initializing the
1946   // compiler runtimes. This, in turn, should not happen. The only known case
1947   // when compiler runtime initialization fails is if there is not enough free
1948   // space in the code cache to generate the necessary stubs, etc.
1949   while (!is_compilation_disabled_forever()) {
1950     // We need this HandleMark to avoid leaking VM handles.
1951     HandleMark hm(thread);
1952 


1953     CompileTask* task = queue->get(thread);
1954     if (task == nullptr) {
1955       if (UseDynamicNumberOfCompilerThreads) {
1956         // Access compiler_count under lock to enforce consistency.
1957         MutexLocker only_one(CompileThread_lock);
1958         if (can_remove(thread, true)) {
1959           if (trace_compiler_threads()) {
1960             ResourceMark rm;
1961             stringStream msg;
1962             msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1963                       thread->name(), thread->idle_time_millis());
1964             print_compiler_threads(msg);
1965           }
1966 
1967           // Notify compiler that the compiler thread is about to stop
1968           thread->compiler()->stopping_compiler_thread(thread);
1969 
1970           free_buffer_blob_if_allocated(thread);
1971           return; // Stop this thread.
1972         }
1973       }
1974     } else {
1975       // Assign the task to the current thread.  Mark this compilation
1976       // thread as active for the profiler.
1977       // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1978       // occurs after fetching the compile task off the queue.
1979       CompileTaskWrapper ctw(task);
1980       methodHandle method(thread, task->method());
1981 
1982       // Never compile a method if breakpoints are present in it
1983       if (method()->number_of_breakpoints() == 0) {
1984         // Compile the method.
1985         if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1986           invoke_compiler_on_method(task);
1987           thread->start_idle_timer();
1988         } else {
1989           // After compilation is disabled, remove remaining methods from queue
1990           method->clear_queued_for_compilation();

1991           task->set_failure_reason("compilation is disabled");
1992         }
1993       } else {
1994         task->set_failure_reason("breakpoints are present");
1995       }
1996 
1997       if (UseDynamicNumberOfCompilerThreads) {


1998         possibly_add_compiler_threads(thread);
1999         assert(!thread->has_pending_exception(), "should have been handled");
2000       }
2001     }
2002   }
2003 
2004   // Shut down compiler runtime
2005   shutdown_compiler_runtime(thread->compiler(), thread);
2006 }
2007 
2008 // ------------------------------------------------------------------
2009 // CompileBroker::init_compiler_thread_log
2010 //
2011 // Set up state required by +LogCompilation.
2012 void CompileBroker::init_compiler_thread_log() {
2013     CompilerThread* thread = CompilerThread::current();
2014     char  file_name[4*K];
2015     FILE* fp = nullptr;
2016     intx thread_id = os::current_thread_id();
2017     for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {

2173 
2174 // Acquires Compilation_lock and waits for it to be notified
2175 // as long as WhiteBox::compilation_locked is true.
2176 static void whitebox_lock_compilation() {
2177   MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2178   while (WhiteBox::compilation_locked) {
2179     locker.wait();
2180   }
2181 }
2182 
2183 // ------------------------------------------------------------------
2184 // CompileBroker::invoke_compiler_on_method
2185 //
2186 // Compile a method.
2187 //
2188 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2189   task->print_ul();
2190   elapsedTimer time;
2191 
2192   DirectiveSet* directive = task->directive();
2193   if (directive->PrintCompilationOption) {
2194     ResourceMark rm;
2195     task->print_tty();
2196   }
2197 
2198   CompilerThread* thread = CompilerThread::current();
2199   ResourceMark rm(thread);
2200 
2201   if (CompilationLog::log() != nullptr) {
2202     CompilationLog::log()->log_compile(thread, task);
2203   }
2204 
2205   // Common flags.
2206   int compile_id = task->compile_id();
2207   int osr_bci = task->osr_bci();
2208   bool is_osr = (osr_bci != standard_entry_bci);
2209   bool should_log = (thread->log() != nullptr);
2210   bool should_break = false;

2211   const int task_level = task->comp_level();
2212   AbstractCompiler* comp = task->compiler();
2213   {
2214     // create the handle inside it's own block so it can't
2215     // accidentally be referenced once the thread transitions to
2216     // native.  The NoHandleMark before the transition should catch
2217     // any cases where this occurs in the future.
2218     methodHandle method(thread, task->method());
2219 
2220     assert(!method->is_native(), "no longer compile natives");
2221 
2222     // Update compile information when using perfdata.
2223     if (UsePerfData) {
2224       update_compile_perf_data(thread, method, is_osr);
2225     }
2226 
2227     DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2228   }
2229 
2230   should_break = directive->BreakAtCompileOption || task->check_break_at_flags();

2335 
2336     if (comp == nullptr) {
2337       ci_env.record_method_not_compilable("no compiler");
2338     } else if (!ci_env.failing()) {
2339       if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2340         whitebox_lock_compilation();
2341       }
2342       comp->compile_method(&ci_env, target, osr_bci, true, directive);
2343 
2344       /* Repeat compilation without installing code for profiling purposes */
2345       int repeat_compilation_count = directive->RepeatCompilationOption;
2346       while (repeat_compilation_count > 0) {
2347         ResourceMark rm(thread);
2348         task->print_ul("NO CODE INSTALLED");
2349         comp->compile_method(&ci_env, target, osr_bci, false, directive);
2350         repeat_compilation_count--;
2351       }
2352     }
2353 
2354 
2355     if (!ci_env.failing() && !task->is_success()) {
2356       assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2357       assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2358       // The compiler elected, without comment, not to register a result.
2359       // Do not attempt further compilations of this method.
2360       ci_env.record_method_not_compilable("compile failed");
2361     }
2362 
2363     // Copy this bit to the enclosing block:
2364     compilable = ci_env.compilable();
2365 
2366     if (ci_env.failing()) {
2367       // Duplicate the failure reason string, so that it outlives ciEnv
2368       failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2369       failure_reason_on_C_heap = true;
2370       retry_message = ci_env.retry_message();
2371       ci_env.report_failure(failure_reason);
2372     }
2373 
2374     if (ci_env.failing()) {
2375       handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2376     }
2377     if (event.should_commit()) {
2378       post_compilation_event(event, task);
2379     }
2380   }
2381 
2382   if (failure_reason != nullptr) {
2383     task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2384     if (CompilationLog::log() != nullptr) {
2385       CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2386     }
2387     if (PrintCompilation || directive->PrintCompilationOption) {
2388       FormatBufferResource msg = retry_message != nullptr ?
2389         FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2390         FormatBufferResource("COMPILE SKIPPED: %s",      failure_reason);
2391       task->print(tty, msg);
2392     }
2393   }
2394 

2395   DirectivesStack::release(directive);
2396 
2397   methodHandle method(thread, task->method());
2398 
2399   DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2400 
2401   collect_statistics(thread, time, task);
2402 
2403   if (PrintCompilation && PrintCompilation2) {
2404     tty->print("%7d ", (int) tty->time_stamp().milliseconds());  // print timestamp
2405     tty->print("%4d ", compile_id);    // print compilation number
2406     tty->print("%s ", (is_osr ? "%" : " "));
2407     if (task->is_success()) {
2408       tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2409     }
2410     tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2411   }
2412 
2413   Log(compilation, codecache) log;
2414   if (log.is_debug()) {
2415     LogStream ls(log.debug());
2416     codecache_print(&ls, /* detailed= */ false);
2417   }
2418   if (PrintCodeCacheOnCompilation) {
2419     codecache_print(/* detailed= */ false);
2420   }
2421   // Disable compilation, if required.
2422   switch (compilable) {
2423   case ciEnv::MethodCompilable_never:
2424     if (is_osr)
2425       method->set_not_osr_compilable_quietly("MethodCompilable_never");
2426     else
2427       method->set_not_compilable_quietly("MethodCompilable_never");
2428     break;
2429   case ciEnv::MethodCompilable_not_at_tier:
2430     if (is_osr)
2431       method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2432     else
2433       method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2434     break;
2435   }
2436 
2437   // Note that the queued_for_compilation bits are cleared without
2438   // protection of a mutex. [They were set by the requester thread,
2439   // when adding the task to the compile queue -- at which time the
2440   // compile queue lock was held. Subsequently, we acquired the compile
2441   // queue lock to get this task off the compile queue; thus (to belabour
2442   // the point somewhat) our clearing of the bits must be occurring
2443   // only after the setting of the bits. See also 14012000 above.
2444   method->clear_queued_for_compilation();






2445 }
2446 
2447 /**
2448  * The CodeCache is full. Print warning and disable compilation.
2449  * Schedule code cache cleaning so compilation can continue later.
2450  * This function needs to be called only from CodeCache::allocate(),
2451  * since we currently handle a full code cache uniformly.
2452  */
2453 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2454   UseInterpreter = true;
2455   if (UseCompiler || AlwaysCompileLoopMethods ) {
2456     if (xtty != nullptr) {
2457       stringStream s;
2458       // Dump code cache state into a buffer before locking the tty,
2459       // because log_state() will use locks causing lock conflicts.
2460       CodeCache::log_state(&s);
2461       // Lock to prevent tearing
2462       ttyLocker ttyl;
2463       xtty->begin_elem("code_cache_full");
2464       xtty->print("%s", s.freeze());

2537 // CompileBroker::collect_statistics
2538 //
2539 // Collect statistics about the compilation.
2540 
2541 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2542   bool success = task->is_success();
2543   methodHandle method (thread, task->method());
2544   int compile_id = task->compile_id();
2545   bool is_osr = (task->osr_bci() != standard_entry_bci);
2546   const int comp_level = task->comp_level();
2547   CompilerCounters* counters = thread->counters();
2548 
2549   MutexLocker locker(CompileStatistics_lock);
2550 
2551   // _perf variables are production performance counters which are
2552   // updated regardless of the setting of the CITime and CITimeEach flags
2553   //
2554 
2555   // account all time, including bailouts and failures in this counter;
2556   // C1 and C2 counters are counting both successful and unsuccessful compiles
2557   _t_total_compilation.add(time);
2558 
2559   // Update compilation times. Used by the implementation of JFR CompilerStatistics
2560   // and java.lang.management.CompilationMXBean.
2561   _perf_total_compilation->inc(time.ticks());
2562   _peak_compilation_time = MAX2(time.milliseconds(), _peak_compilation_time);
2563 
2564   if (!success) {
2565     _total_bailout_count++;
2566     if (UsePerfData) {
2567       _perf_last_failed_method->set_value(counters->current_method());
2568       _perf_last_failed_type->set_value(counters->compile_type());
2569       _perf_total_bailout_count->inc();
2570     }
2571     _t_bailedout_compilation.add(time);











2572   } else if (!task->is_success()) {
2573     if (UsePerfData) {
2574       _perf_last_invalidated_method->set_value(counters->current_method());
2575       _perf_last_invalidated_type->set_value(counters->compile_type());
2576       _perf_total_invalidated_count->inc();
2577     }
2578     _total_invalidated_count++;
2579     _t_invalidated_compilation.add(time);











2580   } else {
2581     // Compilation succeeded
2582     if (CITime) {
2583       int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2584       if (is_osr) {
2585         _t_osr_compilation.add(time);
2586         _sum_osr_bytes_compiled += bytes_compiled;
2587       } else {
2588         _t_standard_compilation.add(time);
2589         _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2590       }
2591 
2592       // Collect statistic per compilation level
2593       if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {









2594         CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2595         if (is_osr) {
2596           stats->_osr.update(time, bytes_compiled);
2597         } else {
2598           stats->_standard.update(time, bytes_compiled);
2599         }
2600         stats->_nmethods_size += task->nm_total_size();
2601         stats->_nmethods_code_size += task->nm_insts_size();
2602       } else {
2603         assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2604       }
2605 
2606       // Collect statistic per compiler
2607       AbstractCompiler* comp = compiler(comp_level);
2608       if (comp) {
2609         CompilerStatistics* stats = comp->stats();
2610         if (is_osr) {
2611           stats->_osr.update(time, bytes_compiled);
2612         } else {
2613           stats->_standard.update(time, bytes_compiled);
2614         }
2615         stats->_nmethods_size += task->nm_total_size();
2616         stats->_nmethods_code_size += task->nm_insts_size();
2617       } else { // if (!comp)
2618         assert(false, "Compiler object must exist");
2619       }
2620     }
2621 
2622     if (UsePerfData) {
2623       // save the name of the last method compiled
2624       _perf_last_method->set_value(counters->current_method());
2625       _perf_last_compile_type->set_value(counters->compile_type());
2626       _perf_last_compile_size->set_value(method->code_size() +
2627                                          task->num_inlined_bytecodes());
2628       if (is_osr) {
2629         _perf_osr_compilation->inc(time.ticks());
2630         _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2631       } else {
2632         _perf_standard_compilation->inc(time.ticks());
2633         _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2634       }
2635     }
2636 
2637     if (CITimeEach) {

2660       _total_standard_compile_count++;
2661     }
2662   }
2663   // set the current method for the thread to null
2664   if (UsePerfData) counters->set_current_method("");
2665 }
2666 
2667 const char* CompileBroker::compiler_name(int comp_level) {
2668   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2669   if (comp == nullptr) {
2670     return "no compiler";
2671   } else {
2672     return (comp->name());
2673   }
2674 }
2675 
2676 jlong CompileBroker::total_compilation_ticks() {
2677   return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2678 }
2679 


















2680 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
2681   tty->print_cr("  %s {speed: %6.3f bytes/s; standard: %6.3f s, %u bytes, %u methods; osr: %6.3f s, %u bytes, %u methods; nmethods_size: %u bytes; nmethods_code_size: %u bytes}",
2682                 name, stats->bytes_per_second(),
2683                 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2684                 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2685                 stats->_nmethods_size, stats->_nmethods_code_size);
2686 }
2687 











































































































2688 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2689   if (per_compiler) {
2690     if (aggregate) {
2691       tty->cr();
2692       tty->print_cr("Individual compiler times (for compiled methods only)");
2693       tty->print_cr("------------------------------------------------");
2694       tty->cr();
2695     }
2696     for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2697       AbstractCompiler* comp = _compilers[i];
2698       if (comp != nullptr) {
2699         print_times(comp->name(), comp->stats());
2700       }
2701     }



2702     if (aggregate) {
2703       tty->cr();
2704       tty->print_cr("Individual compilation Tier times (for compiled methods only)");
2705       tty->print_cr("------------------------------------------------");
2706       tty->cr();
2707     }
2708     char tier_name[256];
2709     for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
2710       CompilerStatistics* stats = &_stats_per_level[tier-1];
2711       os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
2712       print_times(tier_name, stats);
2713     }







2714   }
2715 
2716   if (!aggregate) {
2717     return;
2718   }
2719 
2720   elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2721   elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2722   elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2723 
2724   uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2725   uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2726 
2727   uint standard_compile_count = CompileBroker::_total_standard_compile_count;
2728   uint osr_compile_count = CompileBroker::_total_osr_compile_count;
2729   uint total_compile_count = CompileBroker::_total_compile_count;
2730   uint total_bailout_count = CompileBroker::_total_bailout_count;
2731   uint total_invalidated_count = CompileBroker::_total_invalidated_count;
2732 
2733   uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;

2735 
2736   tty->cr();
2737   tty->print_cr("Accumulated compiler times");
2738   tty->print_cr("----------------------------------------------------------");
2739                //0000000000111111111122222222223333333333444444444455555555556666666666
2740                //0123456789012345678901234567890123456789012345678901234567890123456789
2741   tty->print_cr("  Total compilation time   : %7.3f s", total_compilation.seconds());
2742   tty->print_cr("    Standard compilation   : %7.3f s, Average : %2.3f s",
2743                 standard_compilation.seconds(),
2744                 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
2745   tty->print_cr("    Bailed out compilation : %7.3f s, Average : %2.3f s",
2746                 CompileBroker::_t_bailedout_compilation.seconds(),
2747                 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
2748   tty->print_cr("    On stack replacement   : %7.3f s, Average : %2.3f s",
2749                 osr_compilation.seconds(),
2750                 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
2751   tty->print_cr("    Invalidated            : %7.3f s, Average : %2.3f s",
2752                 CompileBroker::_t_invalidated_compilation.seconds(),
2753                 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
2754 




2755   AbstractCompiler *comp = compiler(CompLevel_simple);
2756   if (comp != nullptr) {
2757     tty->cr();
2758     comp->print_timers();
2759   }
2760   comp = compiler(CompLevel_full_optimization);
2761   if (comp != nullptr) {
2762     tty->cr();
2763     comp->print_timers();
2764   }
2765 #if INCLUDE_JVMCI
2766   if (EnableJVMCI) {
2767     JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
2768     if (jvmci_comp != nullptr && jvmci_comp != comp) {
2769       tty->cr();
2770       jvmci_comp->print_timers();
2771     }
2772   }
2773 #endif
2774 

   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  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "cds/aotLinkedClassBulkLoader.hpp"
  26 #include "cds/cdsConfig.hpp"
  27 #include "classfile/javaClasses.inline.hpp"
  28 #include "classfile/symbolTable.hpp"
  29 #include "classfile/vmClasses.hpp"
  30 #include "classfile/vmSymbols.hpp"
  31 #include "code/aotCodeCache.hpp"
  32 #include "code/codeCache.hpp"
  33 #include "code/codeHeapState.hpp"
  34 #include "code/dependencyContext.hpp"
  35 #include "compiler/compilationLog.hpp"
  36 #include "compiler/compilationMemoryStatistic.hpp"
  37 #include "compiler/compilationPolicy.hpp"
  38 #include "compiler/compileBroker.hpp"
  39 #include "compiler/compileLog.hpp"
  40 #include "compiler/compilerDefinitions.inline.hpp"
  41 #include "compiler/compilerEvent.hpp"
  42 #include "compiler/compilerOracle.hpp"
  43 #include "compiler/directivesParser.hpp"
  44 #include "compiler/recompilationPolicy.hpp"
  45 #include "gc/shared/memAllocator.hpp"
  46 #include "interpreter/linkResolver.hpp"
  47 #include "jfr/jfrEvents.hpp"
  48 #include "jvm.h"
  49 #include "logging/log.hpp"
  50 #include "logging/logStream.hpp"
  51 #include "memory/allocation.inline.hpp"
  52 #include "memory/resourceArea.hpp"
  53 #include "memory/universe.hpp"
  54 #include "oops/method.inline.hpp"
  55 #include "oops/methodData.hpp"
  56 #include "oops/oop.inline.hpp"
  57 #include "prims/jvmtiExport.hpp"
  58 #include "prims/nativeLookup.hpp"
  59 #include "prims/whitebox.hpp"
  60 #include "runtime/atomic.hpp"
  61 #include "runtime/escapeBarrier.hpp"
  62 #include "runtime/globals_extension.hpp"
  63 #include "runtime/handles.inline.hpp"
  64 #include "runtime/init.hpp"
  65 #include "runtime/interfaceSupport.inline.hpp"
  66 #include "runtime/java.hpp"
  67 #include "runtime/javaCalls.hpp"
  68 #include "runtime/jniHandles.inline.hpp"
  69 #include "runtime/os.hpp"
  70 #include "runtime/perfData.hpp"
  71 #include "runtime/safepointVerifiers.hpp"
  72 #include "runtime/sharedRuntime.hpp"
  73 #include "runtime/threads.hpp"
  74 #include "runtime/threadSMR.inline.hpp"
  75 #include "runtime/timerTrace.hpp"
  76 #include "runtime/vframe.inline.hpp"
  77 #include "services/management.hpp"
  78 #include "utilities/debug.hpp"
  79 #include "utilities/dtrace.hpp"
  80 #include "utilities/events.hpp"
  81 #include "utilities/formatBuffer.hpp"
  82 #include "utilities/macros.hpp"
  83 #include "utilities/nonblockingQueue.inline.hpp"
  84 #ifdef COMPILER1
  85 #include "c1/c1_Compiler.hpp"
  86 #endif
  87 #ifdef COMPILER2
  88 #include "opto/c2compiler.hpp"
  89 #endif
  90 #if INCLUDE_JVMCI
  91 #include "jvmci/jvmciEnv.hpp"
  92 #include "jvmci/jvmciRuntime.hpp"
  93 #endif
  94 
  95 #ifdef DTRACE_ENABLED
  96 
  97 // Only bother with this argument setup if dtrace is available
  98 
  99 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)             \
 100   {                                                                      \
 101     Symbol* klass_name = (method)->klass_name();                         \
 102     Symbol* name = (method)->name();                                     \
 103     Symbol* signature = (method)->signature();                           \

 121   }
 122 
 123 #else //  ndef DTRACE_ENABLED
 124 
 125 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
 126 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
 127 
 128 #endif // ndef DTRACE_ENABLED
 129 
 130 bool CompileBroker::_initialized = false;
 131 volatile bool CompileBroker::_should_block = false;
 132 volatile int  CompileBroker::_print_compilation_warning = 0;
 133 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
 134 
 135 // The installed compiler(s)
 136 AbstractCompiler* CompileBroker::_compilers[2];
 137 
 138 // The maximum numbers of compiler threads to be determined during startup.
 139 int CompileBroker::_c1_count = 0;
 140 int CompileBroker::_c2_count = 0;
 141 int CompileBroker::_ac_count = 0;
 142 
 143 // An array of compiler names as Java String objects
 144 jobject* CompileBroker::_compiler1_objects = nullptr;
 145 jobject* CompileBroker::_compiler2_objects = nullptr;
 146 jobject* CompileBroker::_ac_objects = nullptr;
 147 
 148 CompileLog** CompileBroker::_compiler1_logs = nullptr;
 149 CompileLog** CompileBroker::_compiler2_logs = nullptr;
 150 CompileLog** CompileBroker::_ac_logs = nullptr;
 151 
 152 // These counters are used to assign an unique ID to each compilation.
 153 volatile jint CompileBroker::_compilation_id     = 0;
 154 volatile jint CompileBroker::_osr_compilation_id = 0;
 155 volatile jint CompileBroker::_native_compilation_id = 0;
 156 
 157 // Performance counters
 158 PerfCounter* CompileBroker::_perf_total_compilation = nullptr;
 159 PerfCounter* CompileBroker::_perf_osr_compilation = nullptr;
 160 PerfCounter* CompileBroker::_perf_standard_compilation = nullptr;
 161 
 162 PerfCounter* CompileBroker::_perf_total_bailout_count = nullptr;
 163 PerfCounter* CompileBroker::_perf_total_invalidated_count = nullptr;
 164 PerfCounter* CompileBroker::_perf_total_compile_count = nullptr;
 165 PerfCounter* CompileBroker::_perf_total_osr_compile_count = nullptr;
 166 PerfCounter* CompileBroker::_perf_total_standard_compile_count = nullptr;
 167 
 168 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = nullptr;
 169 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = nullptr;
 170 PerfCounter* CompileBroker::_perf_sum_nmethod_size = nullptr;
 171 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = nullptr;
 172 
 173 PerfStringVariable* CompileBroker::_perf_last_method = nullptr;
 174 PerfStringVariable* CompileBroker::_perf_last_failed_method = nullptr;
 175 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = nullptr;
 176 PerfVariable*       CompileBroker::_perf_last_compile_type = nullptr;
 177 PerfVariable*       CompileBroker::_perf_last_compile_size = nullptr;
 178 PerfVariable*       CompileBroker::_perf_last_failed_type = nullptr;
 179 PerfVariable*       CompileBroker::_perf_last_invalidated_type = nullptr;
 180 
 181 // Timers and counters for generating statistics
 182 elapsedTimer CompileBroker::_t_total_compilation;
 183 elapsedTimer CompileBroker::_t_osr_compilation;
 184 elapsedTimer CompileBroker::_t_standard_compilation;
 185 elapsedTimer CompileBroker::_t_invalidated_compilation;
 186 elapsedTimer CompileBroker::_t_bailedout_compilation;
 187 
 188 uint CompileBroker::_total_bailout_count            = 0;
 189 uint CompileBroker::_total_invalidated_count        = 0;
 190 uint CompileBroker::_total_not_entrant_count        = 0;
 191 uint CompileBroker::_total_compile_count            = 0;
 192 uint CompileBroker::_total_osr_compile_count        = 0;
 193 uint CompileBroker::_total_standard_compile_count   = 0;
 194 uint CompileBroker::_total_compiler_stopped_count   = 0;
 195 uint CompileBroker::_total_compiler_restarted_count = 0;
 196 
 197 uint CompileBroker::_sum_osr_bytes_compiled         = 0;
 198 uint CompileBroker::_sum_standard_bytes_compiled    = 0;
 199 uint CompileBroker::_sum_nmethod_size               = 0;
 200 uint CompileBroker::_sum_nmethod_code_size          = 0;
 201 
 202 jlong CompileBroker::_peak_compilation_time        = 0;
 203 
 204 CompilerStatistics CompileBroker::_stats_per_level[CompLevel_full_optimization];
 205 CompilerStatistics CompileBroker::_aot_stats;
 206 CompilerStatistics CompileBroker::_aot_stats_per_level[CompLevel_full_optimization + 1];
 207 
 208 CompileQueue* CompileBroker::_c2_compile_queue     = nullptr;
 209 CompileQueue* CompileBroker::_c1_compile_queue     = nullptr;
 210 CompileQueue* CompileBroker::_ac1_compile_queue    = nullptr;
 211 CompileQueue* CompileBroker::_ac2_compile_queue    = nullptr;
 212 
 213 bool compileBroker_init() {
 214   if (LogEvents) {
 215     CompilationLog::init();
 216   }
 217 
 218   // init directives stack, adding default directive
 219   DirectivesStack::init();
 220 
 221   if (DirectivesParser::has_file()) {
 222     return DirectivesParser::parse_from_flag();
 223   } else if (CompilerDirectivesPrint) {
 224     // Print default directive even when no other was added
 225     DirectivesStack::print(tty);
 226   }
 227 
 228   return true;
 229 }
 230 
 231 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
 232   CompilerThread* thread = CompilerThread::current();
 233   thread->set_task(task);
 234   CompileLog*     log  = thread->log();
 235   thread->timeout()->arm();
 236   if (log != nullptr && !task->is_unloaded())  task->log_task_start(log);
 237 }
 238 
 239 CompileTaskWrapper::~CompileTaskWrapper() {
 240   CompilerThread* thread = CompilerThread::current();
 241   CompileTask* task = thread->task();
 242   CompileLog*  log  = thread->log();
 243   AbstractCompiler* comp = thread->compiler();
 244   if (log != nullptr && !task->is_unloaded())  task->log_task_done(log);
 245   thread->set_task(nullptr);
 246   thread->set_env(nullptr);
 247   thread->timeout()->disarm();
 248   if (task->is_blocking()) {
 249     bool free_task = false;
 250     {
 251       MutexLocker notifier(thread, CompileTaskWait_lock);
 252       task->mark_complete();
 253 #if INCLUDE_JVMCI
 254       if (comp->is_jvmci()) {
 255         if (!task->has_waiter()) {
 256           // The waiting thread timed out and thus did not delete the task.
 257           free_task = true;
 258         }
 259         task->set_blocking_jvmci_compile_state(nullptr);
 260       }
 261 #endif
 262       if (!free_task) {
 263         // Notify the waiting thread that the compilation has completed
 264         // so that it can free the task.
 265         CompileTaskWait_lock->notify_all();
 266       }
 267     }
 268     if (free_task) {
 269       // The task can only be deleted once the task lock is released.
 270       delete task;
 271     }
 272   } else {
 273     task->mark_complete();
 274 
 275     // By convention, the compiling thread is responsible for deleting
 276     // a non-blocking CompileTask.
 277     delete task;
 278   }
 279 }
 280 
 281 /**
 282  * Check if a CompilerThread can be removed and update count if requested.
 283  */
 284 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
 285   assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
 286   if (!ReduceNumberOfCompilerThreads) return false;
 287 
 288   if (RecompilationPolicy::have_recompilation_work()) return false;
 289 
 290   AbstractCompiler *compiler = ct->compiler();
 291   int compiler_count = compiler->num_compiler_threads();
 292   bool c1 = compiler->is_c1();
 293 
 294   // Keep at least 1 compiler thread of each type.
 295   if (compiler_count < 2) return false;
 296 
 297   // Keep thread alive for at least some time.
 298   if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
 299 
 300 #if INCLUDE_JVMCI
 301   if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
 302     // Handles for JVMCI thread objects may get released concurrently.
 303     if (do_it) {
 304       assert(CompileThread_lock->owner() == ct, "must be holding lock");
 305     } else {
 306       // Skip check if it's the last thread and let caller check again.
 307       return true;
 308     }
 309   }

 316     if (do_it) {
 317       assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
 318       compiler->set_num_compiler_threads(compiler_count - 1);
 319 #if INCLUDE_JVMCI
 320       if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
 321         // Old j.l.Thread object can die when no longer referenced elsewhere.
 322         JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
 323         _compiler2_objects[compiler_count - 1] = nullptr;
 324       }
 325 #endif
 326     }
 327     return true;
 328   }
 329   return false;
 330 }
 331 
 332 /**
 333  * Add a CompileTask to a CompileQueue.
 334  */
 335 void CompileQueue::add(CompileTask* task) {
 336   assert(_lock->owned_by_self(), "must own lock");
 337 
 338   task->set_next(nullptr);
 339   task->set_prev(nullptr);
 340 
 341   if (_last == nullptr) {
 342     // The compile queue is empty.
 343     assert(_first == nullptr, "queue is empty");
 344     _first = task;
 345     _last = task;
 346   } else {
 347     // Append the task to the queue.
 348     assert(_last->next() == nullptr, "not last");
 349     _last->set_next(task);
 350     task->set_prev(_last);
 351     _last = task;
 352   }
 353   ++_size;
 354   ++_total_added;
 355   if (_size > _peak_size) {
 356     _peak_size = _size;
 357   }
 358 
 359   // Mark the method as being in the compile queue.
 360   task->method()->set_queued_for_compilation();
 361 
 362   task->mark_queued(os::elapsed_counter());
 363 
 364   if (CIPrintCompileQueue) {
 365     print_tty();
 366   }
 367 
 368   if (LogCompilation && xtty != nullptr) {
 369     task->log_task_queued();
 370   }
 371 
 372   if (TrainingData::need_data() && !CDSConfig::is_dumping_final_static_archive()) {
 373     CompileTrainingData* ctd = CompileTrainingData::make(task);
 374     if (ctd != nullptr) {
 375       task->set_training_data(ctd);
 376     }
 377   }
 378 
 379   // Notify CompilerThreads that a task is available.
 380   _lock->notify_all();
 381 }
 382 
 383 void CompileQueue::add_pending(CompileTask* task) {
 384   assert(_lock->owned_by_self() == false, "must NOT own lock");
 385   assert(UseLockFreeCompileQueues, "");
 386   task->method()->set_queued_for_compilation();
 387   _queue.push(*task);
 388   // FIXME: additional coordination needed? e.g., is it possible for compiler thread to block w/o processing pending tasks?
 389   if (is_empty()) {
 390     MutexLocker ml(_lock);
 391     _lock->notify_all();
 392   }
 393 }
 394 
 395 static bool process_pending(CompileTask* task) {
 396 //  guarantee(task->method()->queued_for_compilation(), "");
 397   if (task->is_unloaded()) {
 398     return true; // unloaded
 399   }
 400   task->method()->set_queued_for_compilation(); // FIXME
 401   if (task->method()->pending_queue_processed()) {
 402     return true; // already queued
 403   }
 404   // Mark the method as being in the compile queue.
 405   task->method()->set_pending_queue_processed();
 406   if (CompileBroker::compilation_is_complete(task->method(), task->osr_bci(), task->comp_level(),
 407                                              task->requires_online_compilation(), task->compile_reason())) {
 408     return true; // already compiled
 409   }
 410   return false; // active
 411 }
 412 
 413 void CompileQueue::transfer_pending() {
 414   assert(_lock->owned_by_self(), "must own lock");
 415 
 416   CompileTask* task;
 417   while ((task = _queue.pop()) != nullptr) {
 418     bool is_stale = process_pending(task);
 419     if (is_stale) {
 420       task->set_next(_first_stale);
 421       task->set_prev(nullptr);
 422       _first_stale = task;
 423     } else {
 424       add(task);
 425     }
 426   }
 427 }
 428 
 429 /**
 430  * Empties compilation queue by deleting all compilation tasks.
 431  * Furthermore, the method wakes up all threads that are waiting
 432  * on a compilation task to finish. This can happen if background
 433  * compilation is disabled.
 434  */
 435 void CompileQueue::delete_all() {
 436   MutexLocker mu(_lock);
 437   transfer_pending();
 438 
 439   CompileTask* current = _first;
 440 
 441   // Iterate over all tasks in the compile queue
 442   while (current != nullptr) {
 443     CompileTask* next = current->next();
 444     if (!current->is_blocking()) {
 445       // Non-blocking task. No one is waiting for it, delete it now.
 446       delete current;
 447     } else {
 448       // Blocking task. By convention, it is the waiters responsibility
 449       // to delete the task. We cannot delete it here, because we do not
 450       // coordinate with waiters. We will notify the waiters later.
 451     }
 452     current = next;
 453   }
 454   _first = nullptr;
 455   _last = nullptr;
 456 
 457   // Wake up all blocking task waiters to deal with remaining blocking
 458   // tasks. This is not a performance sensitive path, so we do this
 459   // unconditionally to simplify coding/testing.
 460   {
 461     MonitorLocker ml(Thread::current(), CompileTaskWait_lock);
 462     ml.notify_all();
 463   }
 464 
 465   // Wake up all threads that block on the queue.
 466   _lock->notify_all();
 467 }
 468 
 469 /**
 470  * Get the next CompileTask from a CompileQueue
 471  */
 472 CompileTask* CompileQueue::get(CompilerThread* thread) {
 473   // save methods from RedefineClasses across safepoint
 474   // across compile queue lock below.
 475   methodHandle save_method;
 476 
 477   MonitorLocker locker(_lock);
 478   transfer_pending();
 479 
 480   RecompilationPolicy::sample_load_average();
 481 
 482   // If _first is null we have no more compile jobs. There are two reasons for
 483   // having no compile jobs: First, we compiled everything we wanted. Second,
 484   // we ran out of code cache so compilation has been disabled. In the latter
 485   // case we perform code cache sweeps to free memory such that we can re-enable
 486   // compilation.
 487   while (_first == nullptr) {
 488     // Exit loop if compilation is disabled forever
 489     if (CompileBroker::is_compilation_disabled_forever()) {
 490       return nullptr;
 491     }
 492 
 493     AbstractCompiler* compiler = thread->compiler();
 494     guarantee(compiler != nullptr, "Compiler object must exist");
 495     compiler->on_empty_queue(this, thread);
 496     if (_first != nullptr) {
 497       // The call to on_empty_queue may have temporarily unlocked the MCQ lock
 498       // so check again whether any tasks were added to the queue.
 499       break;
 500     }
 501 
 502     // If we have added stale tasks, there might be waiters that want
 503     // the notification these tasks have failed. Normally, this would
 504     // be done by a compiler thread that would perform the purge at
 505     // the end of some compilation. But, if compile queue is empty,
 506     // there is no guarantee compilers would run and do the purge.
 507     // Do the purge here and now to unblock the waiters.
 508     // Perform this until we run out of stale tasks.
 509     while (_first_stale != nullptr) {
 510       purge_stale_tasks();
 511     }
 512     if (_first != nullptr) {
 513       // Purge stale tasks may have transferred some new tasks,
 514       // so check again.
 515       break;
 516     }
 517 
 518     // If there are no compilation tasks and we can compile new jobs
 519     // (i.e., there is enough free space in the code cache) there is
 520     // no need to invoke the GC.
 521     // We need a timed wait here, since compiler threads can exit if compilation
 522     // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
 523     // is not critical and we do not want idle compiler threads to wake up too often.
 524     locker.wait(5*1000);
 525 
 526     transfer_pending(); // reacquired lock
 527 
 528     if (RecompilationPolicy::have_recompilation_work()) return nullptr;
 529 
 530     if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
 531       // Still nothing to compile. Give caller a chance to stop this thread.
 532       if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
 533     }
 534   }
 535 
 536   if (CompileBroker::is_compilation_disabled_forever()) {
 537     return nullptr;
 538   }
 539 
 540   CompileTask* task;
 541   {
 542     NoSafepointVerifier nsv;
 543     task = CompilationPolicy::select_task(this, thread);
 544     if (task != nullptr) {
 545       task = task->select_for_compilation();
 546     }
 547   }
 548 
 549   if (task != nullptr) {
 550     // Save method pointers across unlock safepoint.  The task is removed from
 551     // the compilation queue, which is walked during RedefineClasses.
 552     Thread* thread = Thread::current();
 553     save_method = methodHandle(thread, task->method());
 554 
 555     remove(task);
 556   }
 557   purge_stale_tasks(); // may temporarily release MCQ lock
 558   return task;
 559 }
 560 
 561 // Clean & deallocate stale compile tasks.
 562 // Temporarily releases MethodCompileQueue lock.
 563 void CompileQueue::purge_stale_tasks() {
 564   assert(_lock->owned_by_self(), "must own lock");
 565   if (_first_stale != nullptr) {
 566     // Stale tasks are purged when MCQ lock is released,
 567     // but _first_stale updates are protected by MCQ lock.
 568     // Once task processing starts and MCQ lock is released,
 569     // other compiler threads can reuse _first_stale.
 570     CompileTask* head = _first_stale;
 571     _first_stale = nullptr;
 572     {
 573       MutexUnlocker ul(_lock);
 574       for (CompileTask* task = head; task != nullptr; ) {
 575         CompileTask* next_task = task->next();
 576         task->set_next(nullptr);
 577         CompileTaskWrapper ctw(task); // Frees the task
 578         task->set_failure_reason("stale task");
 579         task = next_task;
 580       }
 581     }
 582     transfer_pending(); // transfer pending after reacquiring MCQ lock
 583   }
 584 }
 585 
 586 void CompileQueue::remove(CompileTask* task) {
 587   assert(_lock->owned_by_self(), "must own lock");
 588   if (task->prev() != nullptr) {
 589     task->prev()->set_next(task->next());
 590   } else {
 591     // max is the first element
 592     assert(task == _first, "Sanity");
 593     _first = task->next();
 594   }
 595 
 596   if (task->next() != nullptr) {
 597     task->next()->set_prev(task->prev());
 598   } else {
 599     // max is the last element
 600     assert(task == _last, "Sanity");
 601     _last = task->prev();
 602   }
 603   task->set_next(nullptr);
 604   task->set_prev(nullptr);
 605   --_size;
 606   ++_total_removed;
 607 }
 608 
 609 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
 610   assert(_lock->owned_by_self(), "must own lock");
 611   remove(task);
 612 
 613   // Enqueue the task for reclamation (should be done outside MCQ lock)
 614   task->set_next(_first_stale);
 615   task->set_prev(nullptr);
 616   _first_stale = task;
 617 }
 618 
 619 // methods in the compile queue need to be marked as used on the stack
 620 // so that they don't get reclaimed by Redefine Classes
 621 void CompileQueue::mark_on_stack() {
 622   for (CompileTask* task = _first; task != nullptr; task = task->next()) {
 623     task->mark_on_stack();
 624   }
 625   for (CompileTask* task = _queue.first(); !_queue.is_end(task); task = task->next()) {
 626     assert(task != nullptr, "");
 627     task->mark_on_stack();

 628   }
 629 }
 630 
 631 
 632 CompileQueue* CompileBroker::compile_queue(int comp_level, bool is_aot) {
 633   if (is_c2_compile(comp_level)) return ((is_aot  && (_ac_count > 0)) ? _ac2_compile_queue : _c2_compile_queue);
 634   if (is_c1_compile(comp_level)) return ((is_aot && (_ac_count > 0)) ? _ac1_compile_queue : _c1_compile_queue);
 635   return nullptr;
 636 }
 637 
 638 CompileQueue* CompileBroker::c1_compile_queue() {
 639   return _c1_compile_queue;
 640 }
 641 
 642 CompileQueue* CompileBroker::c2_compile_queue() {
 643   return _c2_compile_queue;
 644 }
 645 
 646 void CompileBroker::print_compile_queues(outputStream* st) {
 647   st->print_cr("Current compiles: ");
 648 
 649   char buf[2000];
 650   int buflen = sizeof(buf);
 651   Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
 652 
 653   st->cr();
 654   if (_c1_compile_queue != nullptr) {
 655     _c1_compile_queue->print(st);
 656   }
 657   if (_c2_compile_queue != nullptr) {
 658     _c2_compile_queue->print(st);
 659   }
 660   if (_ac1_compile_queue != nullptr) {
 661     _ac1_compile_queue->print(st);
 662   }
 663   if (_ac2_compile_queue != nullptr) {
 664     _ac2_compile_queue->print(st);
 665   }
 666 }
 667 
 668 void CompileQueue::print(outputStream* st) {
 669   assert_locked_or_safepoint(_lock);
 670   st->print_cr("%s:", name());
 671   CompileTask* task = _first;
 672   if (task == nullptr) {
 673     st->print_cr("Empty");
 674   } else {
 675     while (task != nullptr) {
 676       task->print(st, nullptr, true, true);
 677       task = task->next();
 678     }
 679   }
 680   st->cr();
 681 }
 682 
 683 void CompileQueue::print_tty() {
 684   stringStream ss;
 685   // Dump the compile queue into a buffer before locking the tty
 686   print(&ss);
 687   {
 688     ttyLocker ttyl;
 689     tty->print("%s", ss.freeze());

 716       CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
 717     }
 718     first_registration = false;
 719 #endif // COMPILER2
 720   }
 721 }
 722 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
 723 
 724 // ------------------------------------------------------------------
 725 // CompileBroker::compilation_init
 726 //
 727 // Initialize the Compilation object
 728 void CompileBroker::compilation_init(JavaThread* THREAD) {
 729   // No need to initialize compilation system if we do not use it.
 730   if (!UseCompiler) {
 731     return;
 732   }
 733   // Set the interface to the current compiler(s).
 734   _c1_count = CompilationPolicy::c1_count();
 735   _c2_count = CompilationPolicy::c2_count();
 736   _ac_count = CompilationPolicy::ac_count();
 737 
 738 #if INCLUDE_JVMCI
 739   if (EnableJVMCI) {
 740     // This is creating a JVMCICompiler singleton.
 741     JVMCICompiler* jvmci = new JVMCICompiler();
 742 
 743     if (UseJVMCICompiler) {
 744       _compilers[1] = jvmci;
 745       if (FLAG_IS_DEFAULT(JVMCIThreads)) {
 746         if (BootstrapJVMCI) {
 747           // JVMCI will bootstrap so give it more threads
 748           _c2_count = MIN2(32, os::active_processor_count());
 749         }
 750       } else {
 751         _c2_count = JVMCIThreads;
 752       }
 753       if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
 754       } else {
 755 #ifdef COMPILER1
 756         _c1_count = JVMCIHostThreads;

 873     _perf_last_compile_size =
 874              PerfDataManager::create_variable(SUN_CI, "lastSize",
 875                                               PerfData::U_Bytes,
 876                                               (jlong)CompileBroker::no_compile,
 877                                               CHECK);
 878 
 879 
 880     _perf_last_failed_type =
 881              PerfDataManager::create_variable(SUN_CI, "lastFailedType",
 882                                               PerfData::U_None,
 883                                               (jlong)CompileBroker::no_compile,
 884                                               CHECK);
 885 
 886     _perf_last_invalidated_type =
 887          PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
 888                                           PerfData::U_None,
 889                                           (jlong)CompileBroker::no_compile,
 890                                           CHECK);
 891   }
 892 
 893   log_info(aot, codecache, init)("CompileBroker is initialized");
 894   _initialized = true;
 895 }
 896 
 897 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
 898   Handle thread_oop = JavaThread::create_system_thread_object(name, CHECK_NH);
 899   return thread_oop;
 900 }
 901 
 902 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
 903   CompilationPolicy::replay_training_at_init_loop(thread);
 904 }
 905 
 906 #if defined(ASSERT) && COMPILER2_OR_JVMCI
 907 // Entry for DeoptimizeObjectsALotThread. The threads are started in
 908 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
 909 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
 910     DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
 911     bool enter_single_loop;
 912     {
 913       MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
 914       static int single_thread_count = 0;
 915       enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
 916     }
 917     if (enter_single_loop) {
 918       dt->deoptimize_objects_alot_loop_single();
 919     } else {
 920       dt->deoptimize_objects_alot_loop_all();
 921     }

1045 }
1046 
1047 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
1048   char name_buffer[256];
1049   os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
1050   Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
1051   return JNIHandles::make_global(thread_oop);
1052 }
1053 
1054 static void print_compiler_threads(stringStream& msg) {
1055   if (TraceCompilerThreads) {
1056     tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
1057   }
1058   LogTarget(Debug, jit, thread) lt;
1059   if (lt.is_enabled()) {
1060     LogStream ls(lt);
1061     ls.print_cr("%s", msg.as_string());
1062   }
1063 }
1064 
1065 static void print_compiler_thread(JavaThread *ct) {
1066   if (trace_compiler_threads()) {
1067     ResourceMark rm;
1068     ThreadsListHandle tlh;  // name() depends on the TLH.
1069     assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1070     stringStream msg;
1071     msg.print("Added initial compiler thread %s", ct->name());
1072     print_compiler_threads(msg);
1073   }
1074 }
1075 
1076 void CompileBroker::init_compiler_threads() {
1077   // Ensure any exceptions lead to vm_exit_during_initialization.
1078   EXCEPTION_MARK;
1079 #if !defined(ZERO)
1080   assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
1081 #endif // !ZERO
1082   // Initialize the compilation queue
1083   if (_c2_count > 0) {
1084     const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
1085     _c2_compile_queue  = new CompileQueue(name, MethodCompileQueueC2_lock);
1086     _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
1087     _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
1088   }
1089   if (_c1_count > 0) {
1090     _c1_compile_queue  = new CompileQueue("C1 compile queue", MethodCompileQueueC1_lock);
1091     _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
1092     _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
1093   }
1094 
1095   if (_ac_count > 0) {
1096     if (_c1_count > 0) { // C1 is present
1097       _ac1_compile_queue  = new CompileQueue("C1 AOT code compile queue", MethodCompileQueueSC1_lock);
1098     }
1099     if (_c2_count > 0) { // C2 is present
1100       _ac2_compile_queue  = new CompileQueue("C2 AOT code compile queue", MethodCompileQueueSC2_lock);
1101     }
1102     _ac_objects = NEW_C_HEAP_ARRAY(jobject, _ac_count, mtCompiler);
1103     _ac_logs = NEW_C_HEAP_ARRAY(CompileLog*, _ac_count, mtCompiler);
1104   }
1105   char name_buffer[256];
1106 
1107   for (int i = 0; i < _c2_count; i++) {
1108     // Create a name for our thread.
1109     jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
1110     _compiler2_objects[i] = thread_handle;
1111     _compiler2_logs[i] = nullptr;
1112 
1113     if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1114       JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
1115       assert(ct != nullptr, "should have been handled for initial thread");
1116       _compilers[1]->set_num_compiler_threads(i + 1);
1117       print_compiler_thread(ct);







1118     }
1119   }
1120 
1121   for (int i = 0; i < _c1_count; i++) {
1122     // Create a name for our thread.
1123     jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1124     _compiler1_objects[i] = thread_handle;
1125     _compiler1_logs[i] = nullptr;
1126 
1127     if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1128       JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1129       assert(ct != nullptr, "should have been handled for initial thread");
1130       _compilers[0]->set_num_compiler_threads(i + 1);
1131       print_compiler_thread(ct);
1132     }
1133   }
1134 
1135   if (_ac_count > 0) {
1136     int i = 0;
1137     if (_c1_count > 0) { // C1 is present
1138       os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d AOT code caching CompilerThread", 1);
1139       Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1140       jobject thread_handle = JNIHandles::make_global(thread_oop);
1141       _ac_objects[i] = thread_handle;
1142       _ac_logs[i] = nullptr;
1143       i++;
1144 
1145       JavaThread *ct = make_thread(compiler_t, thread_handle, _ac1_compile_queue, _compilers[0], THREAD);
1146       assert(ct != nullptr, "should have been handled for initial thread");
1147       print_compiler_thread(ct);
1148     }
1149     if (_c2_count > 0) { // C2 is present
1150       os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d AOT code caching CompilerThread", 2);
1151       Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1152       jobject thread_handle = JNIHandles::make_global(thread_oop);
1153       _ac_objects[i] = thread_handle;
1154       _ac_logs[i] = nullptr;
1155 
1156       JavaThread *ct = make_thread(compiler_t, thread_handle, _ac2_compile_queue, _compilers[1], THREAD);
1157       assert(ct != nullptr, "should have been handled for initial thread");
1158       print_compiler_thread(ct);
1159     }
1160   }
1161 
1162   if (UsePerfData) {
1163     PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
1164   }
1165 
1166 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1167   if (DeoptimizeObjectsALot) {
1168     // Initialize and start the object deoptimizer threads
1169     const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1170     for (int count = 0; count < total_count; count++) {
1171       Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1172       jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1173       make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1174     }
1175   }
1176 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1177 }
1178 
1179 void CompileBroker::init_training_replay() {
1180   // Ensure any exceptions lead to vm_exit_during_initialization.
1181   EXCEPTION_MARK;
1182   if (TrainingData::have_data()) {
1183     Handle thread_oop = create_thread_oop("Training replay thread", CHECK);
1184     jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1185     make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1186   }
1187 }
1188 
1189 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1190 
1191   int old_c2_count = 0, new_c2_count = 0, old_c1_count = 0, new_c1_count = 0;
1192   const int c2_tasks_per_thread = 2, c1_tasks_per_thread = 4;
1193 
1194   // Quick check if we already have enough compiler threads without taking the lock.
1195   // Numbers may change concurrently, so we read them again after we have the lock.
1196   if (_c2_compile_queue != nullptr) {
1197     old_c2_count = get_c2_thread_count();
1198     new_c2_count = MIN2(_c2_count, _c2_compile_queue->size() / c2_tasks_per_thread);
1199   }
1200   if (_c1_compile_queue != nullptr) {
1201     old_c1_count = get_c1_thread_count();
1202     new_c1_count = MIN2(_c1_count, _c1_compile_queue->size() / c1_tasks_per_thread);
1203   }

1299   }
1300 
1301   CompileThread_lock->unlock();
1302 }
1303 
1304 
1305 /**
1306  * Set the methods on the stack as on_stack so that redefine classes doesn't
1307  * reclaim them. This method is executed at a safepoint.
1308  */
1309 void CompileBroker::mark_on_stack() {
1310   assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1311   // Since we are at a safepoint, we do not need a lock to access
1312   // the compile queues.
1313   if (_c2_compile_queue != nullptr) {
1314     _c2_compile_queue->mark_on_stack();
1315   }
1316   if (_c1_compile_queue != nullptr) {
1317     _c1_compile_queue->mark_on_stack();
1318   }
1319   if (_ac1_compile_queue != nullptr) {
1320     _ac1_compile_queue->mark_on_stack();
1321   }
1322   if (_ac2_compile_queue != nullptr) {
1323     _ac2_compile_queue->mark_on_stack();
1324   }
1325 }
1326 
1327 // ------------------------------------------------------------------
1328 // CompileBroker::compile_method
1329 //
1330 // Request compilation of a method.
1331 void CompileBroker::compile_method_base(const methodHandle& method,
1332                                         int osr_bci,
1333                                         int comp_level,
1334                                         int hot_count,
1335                                         CompileTask::CompileReason compile_reason,
1336                                         bool requires_online_compilation,
1337                                         bool blocking,
1338                                         Thread* thread) {
1339   guarantee(!method->is_abstract(), "cannot compile abstract methods");
1340   assert(method->method_holder()->is_instance_klass(),
1341          "sanity check");
1342   assert(!method->method_holder()->is_not_initialized()   ||
1343          compile_reason == CompileTask::Reason_Preload    ||
1344          compile_reason == CompileTask::Reason_Precompile ||
1345          compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1346   assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1347 
1348   if (CIPrintRequests) {
1349     tty->print("request: ");
1350     method->print_short_name(tty);
1351     if (osr_bci != InvocationEntryBci) {
1352       tty->print(" osr_bci: %d", osr_bci);
1353     }
1354     tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1355     if (hot_count > 0) {
1356       tty->print(" hot: yes");
1357     }
1358     tty->cr();
1359   }
1360 
1361   // A request has been made for compilation.  Before we do any
1362   // real work, check to see if the method has been compiled
1363   // in the meantime with a definitive result.
1364   if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1365     return;
1366   }
1367 
1368 #ifndef PRODUCT
1369   if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1370     if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1371       // Positive OSROnlyBCI means only compile that bci.  Negative means don't compile that BCI.
1372       return;
1373     }
1374   }
1375 #endif
1376 
1377   // If this method is already in the compile queue, then
1378   // we do not block the current thread.
1379   if (compilation_is_in_queue(method)) {
1380     // We may want to decay our counter a bit here to prevent
1381     // multiple denied requests for compilation.  This is an
1382     // open compilation policy issue. Note: The other possibility,
1383     // in the case that this is a blocking compile request, is to have
1384     // all subsequent blocking requesters wait for completion of
1385     // ongoing compiles. Note that in this case we'll need a protocol
1386     // for freeing the associated compile tasks. [Or we could have
1387     // a single static monitor on which all these waiters sleep.]
1388     return;
1389   }
1390 
1391   // Tiered policy requires MethodCounters to exist before adding a method to
1392   // the queue. Create if we don't have them yet.
1393   if (compile_reason != CompileTask::Reason_Preload) {
1394     method->get_method_counters(thread);
1395   }
1396 
1397   AOTCodeEntry* aot_code_entry = find_aot_code_entry(method, osr_bci, comp_level, compile_reason, requires_online_compilation);
1398   bool is_aot = (aot_code_entry != nullptr);
1399 
1400   // Outputs from the following MutexLocker block:
1401   CompileTask* task = nullptr;
1402   CompileQueue* queue = compile_queue(comp_level, is_aot);
1403 
1404   // Acquire our lock.
1405   {
1406     ConditionalMutexLocker locker(thread, queue->lock(), !UseLockFreeCompileQueues);
1407 
1408     // Make sure the method has not slipped into the queues since
1409     // last we checked; note that those checks were "fast bail-outs".
1410     // Here we need to be more careful, see 14012000 below.
1411     if (compilation_is_in_queue(method)) {
1412       return;
1413     }
1414 
1415     // We need to check again to see if the compilation has
1416     // completed.  A previous compilation may have registered
1417     // some result.
1418     if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1419       return;
1420     }
1421 
1422     // We now know that this compilation is not pending, complete,
1423     // or prohibited.  Assign a compile_id to this compilation
1424     // and check to see if it is in our [Start..Stop) range.
1425     int compile_id = assign_compile_id(method, osr_bci);
1426     if (compile_id == 0) {
1427       // The compilation falls outside the allowed range.
1428       return;
1429     }
1430 
1431 #if INCLUDE_JVMCI
1432     if (UseJVMCICompiler && blocking) {
1433       // Don't allow blocking compiles for requests triggered by JVMCI.
1434       if (thread->is_Compiler_thread()) {
1435         blocking = false;
1436       }
1437 
1438       // In libjvmci, JVMCI initialization should not deadlock with other threads

1488     // <RESULT, QUEUE> :
1489     //     <0, 1> : in compile queue, but not yet compiled
1490     //     <1, 1> : compiled but queue bit not cleared
1491     //     <1, 0> : compiled and queue bit cleared
1492     // Because we first check the queue bits then check the result bits,
1493     // we are assured that we cannot introduce a duplicate task.
1494     // Note that if we did the tests in the reverse order (i.e. check
1495     // result then check queued bit), we could get the result bit before
1496     // the compilation completed, and the queue bit after the compilation
1497     // completed, and end up introducing a "duplicate" (redundant) task.
1498     // In that case, the compiler thread should first check if a method
1499     // has already been compiled before trying to compile it.
1500     // NOTE: in the event that there are multiple compiler threads and
1501     // there is de-optimization/recompilation, things will get hairy,
1502     // and in that case it's best to protect both the testing (here) of
1503     // these bits, and their updating (here and elsewhere) under a
1504     // common lock.
1505     task = create_compile_task(queue,
1506                                compile_id, method,
1507                                osr_bci, comp_level,
1508                                hot_count, aot_code_entry, compile_reason,
1509                                requires_online_compilation, blocking);
1510 
1511     if (task->is_aot_load() && (_ac_count > 0)) {
1512       // Put it on AOT code caching queue
1513       queue = is_c1_compile(comp_level) ? _ac1_compile_queue : _ac2_compile_queue;
1514     }
1515 
1516     if (UseLockFreeCompileQueues) {
1517       assert(queue->lock()->owned_by_self() == false, "");
1518       queue->add_pending(task);
1519     } else {
1520       queue->add(task);
1521     }
1522   }
1523 
1524   if (blocking) {
1525     wait_for_completion(task);
1526   }
1527 }
1528 
1529 AOTCodeEntry* CompileBroker::find_aot_code_entry(const methodHandle& method, int osr_bci, int comp_level,
1530                                         CompileTask::CompileReason compile_reason,
1531                                         bool requires_online_compilation) {
1532   if (requires_online_compilation || compile_reason == CompileTask::Reason_Whitebox) {
1533     return nullptr; // Need normal JIT compilation
1534   }
1535   AOTCodeEntry* aot_code_entry = nullptr;
1536   if (osr_bci == InvocationEntryBci && AOTCodeCache::is_using_code()) {
1537     // Check for AOT preload code first.
1538     if (compile_reason == CompileTask::Reason_Preload) {
1539       aot_code_entry = method->aot_code_entry();
1540       assert(aot_code_entry != nullptr && aot_code_entry->for_preload(), "sanity");
1541     } else {
1542       aot_code_entry = AOTCodeCache::find_code_entry(method, comp_level);
1543     }
1544   }
1545   return aot_code_entry;
1546 }
1547 
1548 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1549                                        int comp_level,
1550                                        int hot_count,
1551                                        bool requires_online_compilation,
1552                                        CompileTask::CompileReason compile_reason,
1553                                        TRAPS) {
1554   // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1555   if (!_initialized || comp_level == CompLevel_none) {
1556     return nullptr;
1557   }
1558 
1559 #if INCLUDE_JVMCI
1560   if (EnableJVMCI && UseJVMCICompiler &&
1561       comp_level == CompLevel_full_optimization && !AOTLinkedClassBulkLoader::class_preloading_finished()) {
1562     return nullptr;
1563   }
1564 #endif
1565 
1566   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1567   assert(comp != nullptr, "Ensure we have a compiler");
1568 
1569 #if INCLUDE_JVMCI
1570   if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1571     // JVMCI compilation is not yet initializable.
1572     return nullptr;
1573   }
1574 #endif
1575 
1576   DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1577   // CompileBroker::compile_method can trap and can have pending async exception.
1578   nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_count, requires_online_compilation, compile_reason, directive, THREAD);
1579   DirectivesStack::release(directive);
1580   return nm;
1581 }
1582 
1583 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1584                                          int comp_level,
1585                                          int hot_count,
1586                                          bool requires_online_compilation,
1587                                          CompileTask::CompileReason compile_reason,
1588                                          DirectiveSet* directive,
1589                                          TRAPS) {
1590 
1591   // make sure arguments make sense
1592   assert(method->method_holder()->is_instance_klass(), "not an instance method");
1593   assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1594   assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1595   assert(!method->method_holder()->is_not_initialized()   ||
1596          compile_reason == CompileTask::Reason_Preload    ||
1597          compile_reason == CompileTask::Reason_Precompile ||
1598          compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1599   // return quickly if possible
1600   bool aot_compilation = (PrecompileCode && PrecompileOnlyAndExit) ||
1601                          CDSConfig::is_dumping_aot_code();
1602   if (aot_compilation && !CompileTask::reason_is_precompile(compile_reason)) {
1603     // Skip normal compilations when compiling AOT code
1604     return nullptr;
1605   }
1606 
1607   // lock, make sure that the compilation
1608   // isn't prohibited in a straightforward way.
1609   AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1610   if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1611     return nullptr;
1612   }
1613 
1614   if (osr_bci == InvocationEntryBci) {
1615     // standard compilation
1616     nmethod* method_code = method->code();
1617     if (method_code != nullptr) {
1618       if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1619         return method_code;
1620       }
1621     }
1622     if (method->is_not_compilable(comp_level)) {
1623       return nullptr;
1624     }
1625   } else {
1626     // osr compilation
1627     // We accept a higher level osr method
1628     nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1629     if (nm != nullptr) return nm;
1630     if (method->is_not_osr_compilable(comp_level)) return nullptr;
1631   }
1632 
1633   assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1634   // some prerequisites that are compiler specific
1635   if (compile_reason != CompileTask::Reason_Preload &&
1636       !CompileTask::reason_is_precompile(compile_reason) &&
1637      (comp->is_c2() || comp->is_jvmci())) {
1638     InternalOOMEMark iom(THREAD);
1639     method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1640     // Resolve all classes seen in the signature of the method
1641     // we are compiling.
1642     Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1643   }
1644 
1645   // If the method is native, do the lookup in the thread requesting
1646   // the compilation. Native lookups can load code, which is not
1647   // permitted during compilation.
1648   //
1649   // Note: A native method implies non-osr compilation which is
1650   //       checked with an assertion at the entry of this method.
1651   if (method->is_native() && !method->is_method_handle_intrinsic()) {
1652     address adr = NativeLookup::lookup(method, THREAD);
1653     if (HAS_PENDING_EXCEPTION) {
1654       // In case of an exception looking up the method, we just forget
1655       // about it. The interpreter will kick-in and throw the exception.
1656       method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1657       CLEAR_PENDING_EXCEPTION;

1672   }
1673 
1674   // do the compilation
1675   if (method->is_native()) {
1676     if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1677       // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1678       // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1679       //
1680       // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1681       // in this case.  If we can't generate one and use it we can not execute the out-of-line method handle calls.
1682       AdapterHandlerLibrary::create_native_wrapper(method);
1683     } else {
1684       return nullptr;
1685     }
1686   } else {
1687     // If the compiler is shut off due to code cache getting full
1688     // fail out now so blocking compiles dont hang the java thread
1689     if (!should_compile_new_jobs()) {
1690       return nullptr;
1691     }
1692     bool is_blocking = ReplayCompiles                                             ||
1693                        !directive->BackgroundCompilationOption                    ||
1694                        (PreloadBlocking && (compile_reason == CompileTask::Reason_Preload));
1695     compile_method_base(method, osr_bci, comp_level, hot_count, compile_reason, requires_online_compilation, is_blocking, THREAD);
1696   }
1697 
1698   // return requested nmethod
1699   // We accept a higher level osr method
1700   if (osr_bci == InvocationEntryBci) {
1701     return method->code();
1702   }
1703   return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1704 }
1705 
1706 
1707 // ------------------------------------------------------------------
1708 // CompileBroker::compilation_is_complete
1709 //
1710 // See if compilation of this method is already complete.
1711 bool CompileBroker::compilation_is_complete(Method*                    method,
1712                                             int                        osr_bci,
1713                                             int                        comp_level,
1714                                             bool                       online_only,
1715                                             CompileTask::CompileReason compile_reason) {
1716   if (compile_reason == CompileTask::Reason_Precompile ||
1717       compile_reason == CompileTask::Reason_PrecompileForPreload) {
1718     return false; // FIXME: any restrictions?
1719   }
1720   bool is_osr = (osr_bci != standard_entry_bci);
1721   if (is_osr) {
1722     if (method->is_not_osr_compilable(comp_level)) {
1723       return true;
1724     } else {
1725       nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1726       return (result != nullptr);
1727     }
1728   } else {
1729     if (method->is_not_compilable(comp_level)) {
1730       return true;
1731     } else {
1732       nmethod* result = method->code();
1733       if (result == nullptr) {
1734         return false;
1735       }
1736       if (online_only && result->is_aot()) {
1737         return false;
1738       }
1739       bool same_level = (comp_level == result->comp_level());
1740       if (result->has_clinit_barriers()) {
1741         return !same_level; // Allow replace preloaded code with new code of the same level
1742       }
1743       return same_level;
1744     }
1745   }
1746 }
1747 
1748 
1749 /**
1750  * See if this compilation is already requested.
1751  *
1752  * Implementation note: there is only a single "is in queue" bit
1753  * for each method.  This means that the check below is overly
1754  * conservative in the sense that an osr compilation in the queue
1755  * will block a normal compilation from entering the queue (and vice
1756  * versa).  This can be remedied by a full queue search to disambiguate
1757  * cases.  If it is deemed profitable, this may be done.
1758  */
1759 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1760   return method->queued_for_compilation();
1761 }
1762 
1763 // ------------------------------------------------------------------

1823     if (CIStart <= id && id < CIStop) {
1824       return id;
1825     }
1826   }
1827 
1828   // Method was not in the appropriate compilation range.
1829   method->set_not_compilable_quietly("Not in requested compile id range");
1830   return 0;
1831 #else
1832   // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1833   // only _compilation_id is incremented.
1834   return Atomic::add(&_compilation_id, 1);
1835 #endif
1836 }
1837 
1838 // ------------------------------------------------------------------
1839 // CompileBroker::assign_compile_id_unlocked
1840 //
1841 // Public wrapper for assign_compile_id that acquires the needed locks
1842 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {

1843   return assign_compile_id(method, osr_bci);
1844 }
1845 
1846 // ------------------------------------------------------------------
1847 // CompileBroker::create_compile_task
1848 //
1849 // Create a CompileTask object representing the current request for
1850 // compilation.  Add this task to the queue.
1851 CompileTask* CompileBroker::create_compile_task(CompileQueue*       queue,
1852                                                 int                 compile_id,
1853                                                 const methodHandle& method,
1854                                                 int                 osr_bci,
1855                                                 int                 comp_level,
1856                                                 int                 hot_count,
1857                                                 AOTCodeEntry*       aot_code_entry,
1858                                                 CompileTask::CompileReason compile_reason,
1859                                                 bool                requires_online_compilation,
1860                                                 bool                blocking) {
1861   CompileTask* new_task = new CompileTask(compile_id, method, osr_bci, comp_level,
1862                        hot_count, aot_code_entry, compile_reason, queue,
1863                        requires_online_compilation, blocking);
1864   return new_task;
1865 }
1866 
1867 #if INCLUDE_JVMCI
1868 // The number of milliseconds to wait before checking if
1869 // JVMCI compilation has made progress.
1870 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1871 
1872 // The number of JVMCI compilation progress checks that must fail
1873 // before unblocking a thread waiting for a blocking compilation.
1874 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1875 
1876 /**
1877  * Waits for a JVMCI compiler to complete a given task. This thread
1878  * waits until either the task completes or it sees no JVMCI compilation
1879  * progress for N consecutive milliseconds where N is
1880  * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1881  * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1882  *
1883  * @return true if this thread needs to delete the task

1997  * compiler threads can start compiling.
1998  */
1999 bool CompileBroker::init_compiler_runtime() {
2000   CompilerThread* thread = CompilerThread::current();
2001   AbstractCompiler* comp = thread->compiler();
2002   // Final sanity check - the compiler object must exist
2003   guarantee(comp != nullptr, "Compiler object must exist");
2004 
2005   {
2006     // Must switch to native to allocate ci_env
2007     ThreadToNativeFromVM ttn(thread);
2008     ciEnv ci_env((CompileTask*)nullptr);
2009     // Cache Jvmti state
2010     ci_env.cache_jvmti_state();
2011     // Cache DTrace flags
2012     ci_env.cache_dtrace_flags();
2013 
2014     // Switch back to VM state to do compiler initialization
2015     ThreadInVMfromNative tv(thread);
2016 

2017     comp->initialize();
2018   }
2019 
2020   if (comp->is_failed()) {
2021     disable_compilation_forever();
2022     // If compiler initialization failed, no compiler thread that is specific to a
2023     // particular compiler runtime will ever start to compile methods.
2024     shutdown_compiler_runtime(comp, thread);
2025     return false;
2026   }
2027 
2028   // C1 specific check
2029   if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
2030     warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
2031     return false;
2032   }
2033 
2034   return true;
2035 }
2036 
2037 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
2038   BufferBlob* blob = thread->get_buffer_blob();
2039   if (blob != nullptr) {
2040     blob->purge();
2041     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2042     CodeCache::free(blob);
2043   }
2044 }
2045 
2046 /**
2047  * If C1 and/or C2 initialization failed, we shut down all compilation.
2048  * We do this to keep things simple. This can be changed if it ever turns
2049  * out to be a problem.
2050  */
2051 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
2052   free_buffer_blob_if_allocated(thread);
2053 
2054   log_info(compilation)("shutdown_compiler_runtime: " INTPTR_FORMAT, p2i(thread));
2055 
2056   if (comp->should_perform_shutdown()) {
2057     // There are two reasons for shutting down the compiler
2058     // 1) compiler runtime initialization failed
2059     // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
2060     warning("%s initialization failed. Shutting down all compilers", comp->name());
2061 
2062     // Only one thread per compiler runtime object enters here
2063     // Set state to shut down
2064     comp->set_shut_down();
2065 
2066     // Delete all queued compilation tasks to make compiler threads exit faster.
2067     if (_c1_compile_queue != nullptr) {
2068       _c1_compile_queue->delete_all();
2069     }
2070 
2071     if (_c2_compile_queue != nullptr) {
2072       _c2_compile_queue->delete_all();
2073     }
2074 
2075     // Set flags so that we continue execution with using interpreter only.

2079     // We could delete compiler runtimes also. However, there are references to
2080     // the compiler runtime(s) (e.g.,  nmethod::is_compiled_by_c1()) which then
2081     // fail. This can be done later if necessary.
2082   }
2083 }
2084 
2085 /**
2086  * Helper function to create new or reuse old CompileLog.
2087  */
2088 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
2089   if (!LogCompilation) return nullptr;
2090 
2091   AbstractCompiler *compiler = ct->compiler();
2092   bool c1 = compiler->is_c1();
2093   jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
2094   assert(compiler_objects != nullptr, "must be initialized at this point");
2095   CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
2096   assert(logs != nullptr, "must be initialized at this point");
2097   int count = c1 ? _c1_count : _c2_count;
2098 
2099   if (ct->queue() == _ac1_compile_queue || ct->queue() == _ac2_compile_queue) {
2100     compiler_objects = _ac_objects;
2101     logs  = _ac_logs;
2102     count = _ac_count;
2103   }
2104   // Find Compiler number by its threadObj.
2105   oop compiler_obj = ct->threadObj();
2106   int compiler_number = 0;
2107   bool found = false;
2108   for (; compiler_number < count; compiler_number++) {
2109     if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
2110       found = true;
2111       break;
2112     }
2113   }
2114   assert(found, "Compiler must exist at this point");
2115 
2116   // Determine pointer for this thread's log.
2117   CompileLog** log_ptr = &logs[compiler_number];
2118 
2119   // Return old one if it exists.
2120   CompileLog* log = *log_ptr;
2121   if (log != nullptr) {
2122     ct->init_log(log);
2123     return log;

2165   if (!thread->init_compilation_timeout()) {
2166     return;
2167   }
2168 
2169   // If compiler thread/runtime initialization fails, exit the compiler thread
2170   if (!init_compiler_runtime()) {
2171     return;
2172   }
2173 
2174   thread->start_idle_timer();
2175 
2176   // Poll for new compilation tasks as long as the JVM runs. Compilation
2177   // should only be disabled if something went wrong while initializing the
2178   // compiler runtimes. This, in turn, should not happen. The only known case
2179   // when compiler runtime initialization fails is if there is not enough free
2180   // space in the code cache to generate the necessary stubs, etc.
2181   while (!is_compilation_disabled_forever()) {
2182     // We need this HandleMark to avoid leaking VM handles.
2183     HandleMark hm(thread);
2184 
2185     RecompilationPolicy::recompilation_step(AOTRecompilationWorkUnitSize, thread);
2186 
2187     CompileTask* task = queue->get(thread);
2188     if (task == nullptr) {
2189       if (UseDynamicNumberOfCompilerThreads) {
2190         // Access compiler_count under lock to enforce consistency.
2191         MutexLocker only_one(CompileThread_lock);
2192         if (can_remove(thread, true)) {
2193           if (trace_compiler_threads()) {
2194             ResourceMark rm;
2195             stringStream msg;
2196             msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
2197                       thread->name(), thread->idle_time_millis());
2198             print_compiler_threads(msg);
2199           }
2200 
2201           // Notify compiler that the compiler thread is about to stop
2202           thread->compiler()->stopping_compiler_thread(thread);
2203 
2204           free_buffer_blob_if_allocated(thread);
2205           return; // Stop this thread.
2206         }
2207       }
2208     } else {
2209       // Assign the task to the current thread.  Mark this compilation
2210       // thread as active for the profiler.
2211       // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
2212       // occurs after fetching the compile task off the queue.
2213       CompileTaskWrapper ctw(task);
2214       methodHandle method(thread, task->method());
2215 
2216       // Never compile a method if breakpoints are present in it
2217       if (method()->number_of_breakpoints() == 0) {
2218         // Compile the method.
2219         if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
2220           invoke_compiler_on_method(task);
2221           thread->start_idle_timer();
2222         } else {
2223           // After compilation is disabled, remove remaining methods from queue
2224           method->clear_queued_for_compilation();
2225           method->set_pending_queue_processed(false);
2226           task->set_failure_reason("compilation is disabled");
2227         }
2228       } else {
2229         task->set_failure_reason("breakpoints are present");
2230       }
2231 
2232       // Don't use AOT compielr threads for dynamic C1 and C2 threads creation.
2233       if (UseDynamicNumberOfCompilerThreads &&
2234           (queue == _c1_compile_queue || queue == _c2_compile_queue)) {
2235         possibly_add_compiler_threads(thread);
2236         assert(!thread->has_pending_exception(), "should have been handled");
2237       }
2238     }
2239   }
2240 
2241   // Shut down compiler runtime
2242   shutdown_compiler_runtime(thread->compiler(), thread);
2243 }
2244 
2245 // ------------------------------------------------------------------
2246 // CompileBroker::init_compiler_thread_log
2247 //
2248 // Set up state required by +LogCompilation.
2249 void CompileBroker::init_compiler_thread_log() {
2250     CompilerThread* thread = CompilerThread::current();
2251     char  file_name[4*K];
2252     FILE* fp = nullptr;
2253     intx thread_id = os::current_thread_id();
2254     for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {

2410 
2411 // Acquires Compilation_lock and waits for it to be notified
2412 // as long as WhiteBox::compilation_locked is true.
2413 static void whitebox_lock_compilation() {
2414   MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2415   while (WhiteBox::compilation_locked) {
2416     locker.wait();
2417   }
2418 }
2419 
2420 // ------------------------------------------------------------------
2421 // CompileBroker::invoke_compiler_on_method
2422 //
2423 // Compile a method.
2424 //
2425 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2426   task->print_ul();
2427   elapsedTimer time;
2428 
2429   DirectiveSet* directive = task->directive();




2430 
2431   CompilerThread* thread = CompilerThread::current();
2432   ResourceMark rm(thread);
2433 
2434   if (CompilationLog::log() != nullptr) {
2435     CompilationLog::log()->log_compile(thread, task);
2436   }
2437 
2438   // Common flags.
2439   int compile_id = task->compile_id();
2440   int osr_bci = task->osr_bci();
2441   bool is_osr = (osr_bci != standard_entry_bci);
2442   bool should_log = (thread->log() != nullptr);
2443   bool should_break = false;
2444   bool should_print_compilation = PrintCompilation || directive->PrintCompilationOption;
2445   const int task_level = task->comp_level();
2446   AbstractCompiler* comp = task->compiler();
2447   {
2448     // create the handle inside it's own block so it can't
2449     // accidentally be referenced once the thread transitions to
2450     // native.  The NoHandleMark before the transition should catch
2451     // any cases where this occurs in the future.
2452     methodHandle method(thread, task->method());
2453 
2454     assert(!method->is_native(), "no longer compile natives");
2455 
2456     // Update compile information when using perfdata.
2457     if (UsePerfData) {
2458       update_compile_perf_data(thread, method, is_osr);
2459     }
2460 
2461     DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2462   }
2463 
2464   should_break = directive->BreakAtCompileOption || task->check_break_at_flags();

2569 
2570     if (comp == nullptr) {
2571       ci_env.record_method_not_compilable("no compiler");
2572     } else if (!ci_env.failing()) {
2573       if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2574         whitebox_lock_compilation();
2575       }
2576       comp->compile_method(&ci_env, target, osr_bci, true, directive);
2577 
2578       /* Repeat compilation without installing code for profiling purposes */
2579       int repeat_compilation_count = directive->RepeatCompilationOption;
2580       while (repeat_compilation_count > 0) {
2581         ResourceMark rm(thread);
2582         task->print_ul("NO CODE INSTALLED");
2583         comp->compile_method(&ci_env, target, osr_bci, false, directive);
2584         repeat_compilation_count--;
2585       }
2586     }
2587 
2588 
2589     if (!ci_env.failing() && !task->is_success() && !task->is_precompile()) {
2590       assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2591       assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2592       // The compiler elected, without comment, not to register a result.
2593       // Do not attempt further compilations of this method.
2594       ci_env.record_method_not_compilable("compile failed");
2595     }
2596 
2597     // Copy this bit to the enclosing block:
2598     compilable = ci_env.compilable();
2599 
2600     if (ci_env.failing()) {
2601       // Duplicate the failure reason string, so that it outlives ciEnv
2602       failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2603       failure_reason_on_C_heap = true;
2604       retry_message = ci_env.retry_message();
2605       ci_env.report_failure(failure_reason);
2606     }
2607 
2608     if (ci_env.failing()) {
2609       handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2610     }
2611     if (event.should_commit()) {
2612       post_compilation_event(event, task);
2613     }
2614   }
2615 
2616   if (failure_reason != nullptr) {
2617     task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2618     if (CompilationLog::log() != nullptr) {
2619       CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2620     }
2621     if (PrintCompilation || directive->PrintCompilationOption) {
2622       FormatBufferResource msg = retry_message != nullptr ?
2623         FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2624         FormatBufferResource("COMPILE SKIPPED: %s",      failure_reason);
2625       task->print(tty, msg);
2626     }
2627   }
2628 
2629   task->mark_finished(os::elapsed_counter());
2630   DirectivesStack::release(directive);
2631 
2632   methodHandle method(thread, task->method());
2633 
2634   DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2635 
2636   collect_statistics(thread, time, task);
2637 
2638   if (PrintCompilation && PrintCompilation2) {
2639     tty->print("%7d ", (int) tty->time_stamp().milliseconds());  // print timestamp
2640     tty->print("%4d ", compile_id);    // print compilation number
2641     tty->print("%s ", (is_osr ? "%" : (task->is_aot_load() ? (task->preload() ? "P" : "A") : " ")));
2642     if (task->is_success()) {
2643       tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2644     }
2645     tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2646   }
2647 
2648   Log(compilation, codecache) log;
2649   if (log.is_debug()) {
2650     LogStream ls(log.debug());
2651     codecache_print(&ls, /* detailed= */ false);
2652   }
2653   if (PrintCodeCacheOnCompilation) {
2654     codecache_print(/* detailed= */ false);
2655   }
2656   // Disable compilation, if required.
2657   switch (compilable) {
2658   case ciEnv::MethodCompilable_never:
2659     if (is_osr)
2660       method->set_not_osr_compilable_quietly("MethodCompilable_never");
2661     else
2662       method->set_not_compilable_quietly("MethodCompilable_never");
2663     break;
2664   case ciEnv::MethodCompilable_not_at_tier:
2665     if (is_osr)
2666       method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2667     else
2668       method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2669     break;
2670   }
2671 
2672   // Note that the queued_for_compilation bits are cleared without
2673   // protection of a mutex. [They were set by the requester thread,
2674   // when adding the task to the compile queue -- at which time the
2675   // compile queue lock was held. Subsequently, we acquired the compile
2676   // queue lock to get this task off the compile queue; thus (to belabour
2677   // the point somewhat) our clearing of the bits must be occurring
2678   // only after the setting of the bits. See also 14012000 above.
2679   method->clear_queued_for_compilation();
2680   method->set_pending_queue_processed(false);
2681 
2682   if (should_print_compilation) {
2683     ResourceMark rm;
2684     task->print_tty();
2685   }
2686 }
2687 
2688 /**
2689  * The CodeCache is full. Print warning and disable compilation.
2690  * Schedule code cache cleaning so compilation can continue later.
2691  * This function needs to be called only from CodeCache::allocate(),
2692  * since we currently handle a full code cache uniformly.
2693  */
2694 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2695   UseInterpreter = true;
2696   if (UseCompiler || AlwaysCompileLoopMethods ) {
2697     if (xtty != nullptr) {
2698       stringStream s;
2699       // Dump code cache state into a buffer before locking the tty,
2700       // because log_state() will use locks causing lock conflicts.
2701       CodeCache::log_state(&s);
2702       // Lock to prevent tearing
2703       ttyLocker ttyl;
2704       xtty->begin_elem("code_cache_full");
2705       xtty->print("%s", s.freeze());

2778 // CompileBroker::collect_statistics
2779 //
2780 // Collect statistics about the compilation.
2781 
2782 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2783   bool success = task->is_success();
2784   methodHandle method (thread, task->method());
2785   int compile_id = task->compile_id();
2786   bool is_osr = (task->osr_bci() != standard_entry_bci);
2787   const int comp_level = task->comp_level();
2788   CompilerCounters* counters = thread->counters();
2789 
2790   MutexLocker locker(CompileStatistics_lock);
2791 
2792   // _perf variables are production performance counters which are
2793   // updated regardless of the setting of the CITime and CITimeEach flags
2794   //
2795 
2796   // account all time, including bailouts and failures in this counter;
2797   // C1 and C2 counters are counting both successful and unsuccessful compiles
2798   _t_total_compilation.add(&time);
2799 
2800   // Update compilation times. Used by the implementation of JFR CompilerStatistics
2801   // and java.lang.management.CompilationMXBean.
2802   _perf_total_compilation->inc(time.ticks());
2803   _peak_compilation_time = MAX2(time.milliseconds(), _peak_compilation_time);
2804 
2805   if (!success) {
2806     _total_bailout_count++;
2807     if (UsePerfData) {
2808       _perf_last_failed_method->set_value(counters->current_method());
2809       _perf_last_failed_type->set_value(counters->compile_type());
2810       _perf_total_bailout_count->inc();
2811     }
2812     _t_bailedout_compilation.add(&time);
2813 
2814     if (CITime || log_is_enabled(Info, init)) {
2815       CompilerStatistics* stats = nullptr;
2816       if (task->is_aot_load()) {
2817         int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2818         stats = &_aot_stats_per_level[level];
2819       } else {
2820         stats = &_stats_per_level[comp_level-1];
2821       }
2822       stats->_bailout.update(time, 0);
2823     }
2824   } else if (!task->is_success()) {
2825     if (UsePerfData) {
2826       _perf_last_invalidated_method->set_value(counters->current_method());
2827       _perf_last_invalidated_type->set_value(counters->compile_type());
2828       _perf_total_invalidated_count->inc();
2829     }
2830     _total_invalidated_count++;
2831     _t_invalidated_compilation.add(&time);
2832 
2833     if (CITime || log_is_enabled(Info, init)) {
2834       CompilerStatistics* stats = nullptr;
2835       if (task->is_aot_load()) {
2836         int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2837         stats = &_aot_stats_per_level[level];
2838       } else {
2839         stats = &_stats_per_level[comp_level-1];
2840       }
2841       stats->_invalidated.update(time, 0);
2842     }
2843   } else {
2844     // Compilation succeeded
2845     if (CITime || log_is_enabled(Info, init)) {
2846       int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2847       if (is_osr) {
2848         _t_osr_compilation.add(&time);
2849         _sum_osr_bytes_compiled += bytes_compiled;
2850       } else {
2851         _t_standard_compilation.add(&time);
2852         _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2853       }
2854 
2855       // Collect statistic per compilation level
2856       if (task->is_aot_load()) {
2857         _aot_stats._standard.update(time, bytes_compiled);
2858         _aot_stats._nmethods_size += task->nm_total_size();
2859         _aot_stats._nmethods_code_size += task->nm_insts_size();
2860         int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2861         CompilerStatistics* stats = &_aot_stats_per_level[level];
2862         stats->_standard.update(time, bytes_compiled);
2863         stats->_nmethods_size += task->nm_total_size();
2864         stats->_nmethods_code_size += task->nm_insts_size();
2865       } else if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2866         CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2867         if (is_osr) {
2868           stats->_osr.update(time, bytes_compiled);
2869         } else {
2870           stats->_standard.update(time, bytes_compiled);
2871         }
2872         stats->_nmethods_size += task->nm_total_size();
2873         stats->_nmethods_code_size += task->nm_insts_size();
2874       } else {
2875         assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2876       }
2877 
2878       // Collect statistic per compiler
2879       AbstractCompiler* comp = task->compiler();
2880       if (comp && !task->is_aot_load()) {
2881         CompilerStatistics* stats = comp->stats();
2882         if (is_osr) {
2883           stats->_osr.update(time, bytes_compiled);
2884         } else {
2885           stats->_standard.update(time, bytes_compiled);
2886         }
2887         stats->_nmethods_size += task->nm_total_size();
2888         stats->_nmethods_code_size += task->nm_insts_size();
2889       } else if (!task->is_aot_load()) { // if (!comp)
2890         assert(false, "Compiler object must exist");
2891       }
2892     }
2893 
2894     if (UsePerfData) {
2895       // save the name of the last method compiled
2896       _perf_last_method->set_value(counters->current_method());
2897       _perf_last_compile_type->set_value(counters->compile_type());
2898       _perf_last_compile_size->set_value(method->code_size() +
2899                                          task->num_inlined_bytecodes());
2900       if (is_osr) {
2901         _perf_osr_compilation->inc(time.ticks());
2902         _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2903       } else {
2904         _perf_standard_compilation->inc(time.ticks());
2905         _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2906       }
2907     }
2908 
2909     if (CITimeEach) {

2932       _total_standard_compile_count++;
2933     }
2934   }
2935   // set the current method for the thread to null
2936   if (UsePerfData) counters->set_current_method("");
2937 }
2938 
2939 const char* CompileBroker::compiler_name(int comp_level) {
2940   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2941   if (comp == nullptr) {
2942     return "no compiler";
2943   } else {
2944     return (comp->name());
2945   }
2946 }
2947 
2948 jlong CompileBroker::total_compilation_ticks() {
2949   return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2950 }
2951 
2952 void CompileBroker::log_not_entrant(nmethod* nm) {
2953   _total_not_entrant_count++;
2954   if (CITime || log_is_enabled(Info, init)) {
2955     CompilerStatistics* stats = nullptr;
2956     int level = nm->comp_level();
2957     if (nm->is_aot()) {
2958       if (nm->preloaded()) {
2959         assert(level == CompLevel_full_optimization, "%d", level);
2960         level = CompLevel_full_optimization + 1;
2961       }
2962       stats = &_aot_stats_per_level[level - 1];
2963     } else {
2964       stats = &_stats_per_level[level - 1];
2965     }
2966     stats->_made_not_entrant._count++;
2967   }
2968 }
2969 
2970 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
2971   tty->print_cr("  %s {speed: %6.3f bytes/s; standard: %6.3f s, %u bytes, %u methods; osr: %6.3f s, %u bytes, %u methods; nmethods_size: %u bytes; nmethods_code_size: %u bytes}",
2972                 name, stats->bytes_per_second(),
2973                 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2974                 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2975                 stats->_nmethods_size, stats->_nmethods_code_size);
2976 }
2977 
2978 static void print_helper(outputStream* st, const char* name, CompilerStatistics::Data data, bool print_time = true) {
2979   if (data._count > 0) {
2980     st->print("; %s: %4u methods", name, data._count);
2981     if (print_time) {
2982       st->print(" (in %.3fs)", data._time.seconds());
2983     }
2984   }
2985 }
2986 
2987 static void print_tier_helper(outputStream* st, const char* prefix, int tier, CompilerStatistics* stats) {
2988   st->print("    %s%d: %5u methods", prefix, tier, stats->_standard._count);
2989   if (stats->_standard._count > 0) {
2990     st->print(" (in %.3fs)", stats->_standard._time.seconds());
2991   }
2992   print_helper(st, "osr",     stats->_osr);
2993   print_helper(st, "bailout", stats->_bailout);
2994   print_helper(st, "invalid", stats->_invalidated);
2995   print_helper(st, "not_entrant", stats->_made_not_entrant, false);
2996   st->cr();
2997 }
2998 
2999 static void print_queue_info(outputStream* st, CompileQueue* queue) {
3000   if (queue != nullptr) {
3001     MutexLocker ml(queue->lock());
3002 
3003     uint  total_cnt = 0;
3004     uint active_cnt = 0;
3005     for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3006       guarantee(jt != nullptr, "");
3007       if (jt->is_Compiler_thread()) {
3008         CompilerThread* ct = (CompilerThread*)jt;
3009 
3010         guarantee(ct != nullptr, "");
3011         if (ct->queue() == queue) {
3012           ++total_cnt;
3013           CompileTask* task = ct->task();
3014           if (task != nullptr) {
3015             ++active_cnt;
3016           }
3017         }
3018       }
3019     }
3020 
3021     st->print("  %s (%d active / %d total threads): %u tasks",
3022               queue->name(), active_cnt, total_cnt, queue->size());
3023     if (queue->size() > 0) {
3024       uint counts[] = {0, 0, 0, 0, 0}; // T1 ... T5
3025       for (CompileTask* task = queue->first(); task != nullptr; task = task->next()) {
3026         int tier = task->comp_level();
3027         if (task->is_aot_load() && task->preload()) {
3028           assert(tier == CompLevel_full_optimization, "%d", tier);
3029           tier = CompLevel_full_optimization + 1;
3030         }
3031         counts[tier-1]++;
3032       }
3033       st->print(":");
3034       for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3035         uint cnt = counts[tier-1];
3036         if (cnt > 0) {
3037           st->print(" T%d: %u tasks;", tier, cnt);
3038         }
3039       }
3040     }
3041     st->cr();
3042 
3043 //    for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3044 //      guarantee(jt != nullptr, "");
3045 //      if (jt->is_Compiler_thread()) {
3046 //        CompilerThread* ct = (CompilerThread*)jt;
3047 //
3048 //        guarantee(ct != nullptr, "");
3049 //        if (ct->queue() == queue) {
3050 //          ResourceMark rm;
3051 //          CompileTask* task = ct->task();
3052 //          st->print("    %s: ", ct->name_raw());
3053 //          if (task != nullptr) {
3054 //            task->print(st, nullptr, true /*short_form*/, false /*cr*/);
3055 //          }
3056 //          st->cr();
3057 //        }
3058 //      }
3059 //    }
3060   }
3061 }
3062 void CompileBroker::print_statistics_on(outputStream* st) {
3063   st->print_cr("  Total: %u methods; %u bailouts, %u invalidated, %u non_entrant",
3064                _total_compile_count, _total_bailout_count, _total_invalidated_count, _total_not_entrant_count);
3065   for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3066     print_tier_helper(st, "Tier", tier, &_stats_per_level[tier-1]);
3067   }
3068   st->cr();
3069 
3070   if (AOTCodeCaching) {
3071     for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3072       if (tier != CompLevel_full_profile) {
3073         print_tier_helper(st, "AOT Code T", tier, &_aot_stats_per_level[tier - 1]);
3074       }
3075     }
3076     st->cr();
3077   }
3078 
3079   print_queue_info(st, _c1_compile_queue);
3080   print_queue_info(st, _c2_compile_queue);
3081   print_queue_info(st, _ac1_compile_queue);
3082   print_queue_info(st, _ac2_compile_queue);
3083 }
3084 
3085 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
3086   if (per_compiler) {
3087     if (aggregate) {
3088       tty->cr();
3089       tty->print_cr("[%dms] Individual compiler times (for compiled methods only)", (int)tty->time_stamp().milliseconds());
3090       tty->print_cr("------------------------------------------------");
3091       tty->cr();
3092     }
3093     for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
3094       AbstractCompiler* comp = _compilers[i];
3095       if (comp != nullptr) {
3096         print_times(comp->name(), comp->stats());
3097       }
3098     }
3099     if (_aot_stats._standard._count > 0) {
3100       print_times("SC", &_aot_stats);
3101     }
3102     if (aggregate) {
3103       tty->cr();
3104       tty->print_cr("Individual compilation Tier times (for compiled methods only)");
3105       tty->print_cr("------------------------------------------------");
3106       tty->cr();
3107     }
3108     char tier_name[256];
3109     for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3110       CompilerStatistics* stats = &_stats_per_level[tier-1];
3111       os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
3112       print_times(tier_name, stats);
3113     }
3114     for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3115       CompilerStatistics* stats = &_aot_stats_per_level[tier-1];
3116       if (stats->_standard._bytes > 0) {
3117         os::snprintf_checked(tier_name, sizeof(tier_name), "AOT Code T%d", tier);
3118         print_times(tier_name, stats);
3119       }
3120     }
3121   }
3122 
3123   if (!aggregate) {
3124     return;
3125   }
3126 
3127   elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
3128   elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
3129   elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
3130 
3131   uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
3132   uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
3133 
3134   uint standard_compile_count = CompileBroker::_total_standard_compile_count;
3135   uint osr_compile_count = CompileBroker::_total_osr_compile_count;
3136   uint total_compile_count = CompileBroker::_total_compile_count;
3137   uint total_bailout_count = CompileBroker::_total_bailout_count;
3138   uint total_invalidated_count = CompileBroker::_total_invalidated_count;
3139 
3140   uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;

3142 
3143   tty->cr();
3144   tty->print_cr("Accumulated compiler times");
3145   tty->print_cr("----------------------------------------------------------");
3146                //0000000000111111111122222222223333333333444444444455555555556666666666
3147                //0123456789012345678901234567890123456789012345678901234567890123456789
3148   tty->print_cr("  Total compilation time   : %7.3f s", total_compilation.seconds());
3149   tty->print_cr("    Standard compilation   : %7.3f s, Average : %2.3f s",
3150                 standard_compilation.seconds(),
3151                 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
3152   tty->print_cr("    Bailed out compilation : %7.3f s, Average : %2.3f s",
3153                 CompileBroker::_t_bailedout_compilation.seconds(),
3154                 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
3155   tty->print_cr("    On stack replacement   : %7.3f s, Average : %2.3f s",
3156                 osr_compilation.seconds(),
3157                 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
3158   tty->print_cr("    Invalidated            : %7.3f s, Average : %2.3f s",
3159                 CompileBroker::_t_invalidated_compilation.seconds(),
3160                 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
3161 
3162   if (AOTCodeCaching) { // Check flags because AOT code cache could be closed already
3163     tty->cr();
3164     AOTCodeCache::print_timers_on(tty);
3165   }
3166   AbstractCompiler *comp = compiler(CompLevel_simple);
3167   if (comp != nullptr) {
3168     tty->cr();
3169     comp->print_timers();
3170   }
3171   comp = compiler(CompLevel_full_optimization);
3172   if (comp != nullptr) {
3173     tty->cr();
3174     comp->print_timers();
3175   }
3176 #if INCLUDE_JVMCI
3177   if (EnableJVMCI) {
3178     JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
3179     if (jvmci_comp != nullptr && jvmci_comp != comp) {
3180       tty->cr();
3181       jvmci_comp->print_timers();
3182     }
3183   }
3184 #endif
3185 
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