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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 "classfile/javaClasses.inline.hpp"
  26 #include "classfile/symbolTable.hpp"
  27 #include "classfile/vmClasses.hpp"
  28 #include "classfile/vmSymbols.hpp"
  29 #include "code/codeCache.hpp"
  30 #include "code/codeHeapState.hpp"
  31 #include "code/dependencyContext.hpp"

  32 #include "compiler/compilationLog.hpp"
  33 #include "compiler/compilationMemoryStatistic.hpp"
  34 #include "compiler/compilationPolicy.hpp"
  35 #include "compiler/compileBroker.hpp"

  36 #include "compiler/compileLog.hpp"
  37 #include "compiler/compilerEvent.hpp"
  38 #include "compiler/compilerOracle.hpp"
  39 #include "compiler/directivesParser.hpp"

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

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

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

 109     HOTSPOT_METHOD_COMPILE_END(                                          \
 110       (char *) comp_name, strlen(comp_name),                             \
 111       (char *) klass_name->bytes(), klass_name->utf8_length(),           \
 112       (char *) name->bytes(), name->utf8_length(),                       \
 113       (char *) signature->bytes(), signature->utf8_length(), (success)); \
 114   }
 115 
 116 #else //  ndef DTRACE_ENABLED
 117 
 118 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
 119 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
 120 
 121 #endif // ndef DTRACE_ENABLED
 122 
 123 bool CompileBroker::_initialized = false;
 124 volatile bool CompileBroker::_should_block = false;
 125 volatile int  CompileBroker::_print_compilation_warning = 0;
 126 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
 127 
 128 // The installed compiler(s)
 129 AbstractCompiler* CompileBroker::_compilers[2];
 130 
 131 // The maximum numbers of compiler threads to be determined during startup.
 132 int CompileBroker::_c1_count = 0;
 133 int CompileBroker::_c2_count = 0;


 134 
 135 // An array of compiler names as Java String objects
 136 jobject* CompileBroker::_compiler1_objects = nullptr;
 137 jobject* CompileBroker::_compiler2_objects = nullptr;


 138 
 139 CompileLog** CompileBroker::_compiler1_logs = nullptr;
 140 CompileLog** CompileBroker::_compiler2_logs = nullptr;


 141 
 142 // These counters are used to assign an unique ID to each compilation.
 143 volatile jint CompileBroker::_compilation_id     = 0;
 144 volatile jint CompileBroker::_osr_compilation_id = 0;
 145 volatile jint CompileBroker::_native_compilation_id = 0;
 146 
 147 // Performance counters
 148 PerfCounter* CompileBroker::_perf_total_compilation = nullptr;
 149 PerfCounter* CompileBroker::_perf_osr_compilation = nullptr;
 150 PerfCounter* CompileBroker::_perf_standard_compilation = nullptr;
 151 
 152 PerfCounter* CompileBroker::_perf_total_bailout_count = nullptr;
 153 PerfCounter* CompileBroker::_perf_total_invalidated_count = nullptr;
 154 PerfCounter* CompileBroker::_perf_total_compile_count = nullptr;
 155 PerfCounter* CompileBroker::_perf_total_osr_compile_count = nullptr;
 156 PerfCounter* CompileBroker::_perf_total_standard_compile_count = nullptr;
 157 
 158 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = nullptr;
 159 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = nullptr;
 160 PerfCounter* CompileBroker::_perf_sum_nmethod_size = nullptr;
 161 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = nullptr;
 162 
 163 PerfStringVariable* CompileBroker::_perf_last_method = nullptr;
 164 PerfStringVariable* CompileBroker::_perf_last_failed_method = nullptr;
 165 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = nullptr;
 166 PerfVariable*       CompileBroker::_perf_last_compile_type = nullptr;
 167 PerfVariable*       CompileBroker::_perf_last_compile_size = nullptr;
 168 PerfVariable*       CompileBroker::_perf_last_failed_type = nullptr;
 169 PerfVariable*       CompileBroker::_perf_last_invalidated_type = nullptr;
 170 
 171 // Timers and counters for generating statistics
 172 elapsedTimer CompileBroker::_t_total_compilation;
 173 elapsedTimer CompileBroker::_t_osr_compilation;
 174 elapsedTimer CompileBroker::_t_standard_compilation;
 175 elapsedTimer CompileBroker::_t_invalidated_compilation;
 176 elapsedTimer CompileBroker::_t_bailedout_compilation;
 177 
 178 uint CompileBroker::_total_bailout_count            = 0;
 179 uint CompileBroker::_total_invalidated_count        = 0;

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


 194 

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


 197 
 198 bool compileBroker_init() {
 199   if (LogEvents) {
 200     CompilationLog::init();
 201   }
 202 
 203   // init directives stack, adding default directive
 204   DirectivesStack::init();
 205 
 206   if (DirectivesParser::has_file()) {
 207     return DirectivesParser::parse_from_flag();
 208   } else if (CompilerDirectivesPrint) {
 209     // Print default directive even when no other was added
 210     DirectivesStack::print(tty);
 211   }
 212 
 213   return true;
 214 }
 215 
 216 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
 217   CompilerThread* thread = CompilerThread::current();
 218   thread->set_task(task);
 219   CompileLog*     log  = thread->log();
 220   if (log != nullptr && !task->is_unloaded())  task->log_task_start(log);
 221 }
 222 
 223 CompileTaskWrapper::~CompileTaskWrapper() {
 224   CompilerThread* thread = CompilerThread::current();
 225   CompileTask* task = thread->task();
 226   CompileLog*  log  = thread->log();

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


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

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


 342   if (CIPrintCompileQueue) {
 343     print_tty();
 344   }
 345 
 346   if (LogCompilation && xtty != nullptr) {
 347     task->log_task_queued();
 348   }
 349 







 350   // Notify CompilerThreads that a task is available.
 351   MethodCompileQueue_lock->notify_all();














































 352 }
 353 
 354 /**
 355  * Empties compilation queue by putting all compilation tasks onto
 356  * a freelist. Furthermore, the method wakes up all threads that are
 357  * waiting on a compilation task to finish. This can happen if background
 358  * compilation is disabled.
 359  */
 360 void CompileQueue::free_all() {
 361   MutexLocker mu(MethodCompileQueue_lock);


 362   CompileTask* next = _first;
 363 
 364   // Iterate over all tasks in the compile queue
 365   while (next != nullptr) {
 366     CompileTask* current = next;
 367     next = current->next();
 368     bool found_waiter = false;
 369     {
 370       MutexLocker ct_lock(current->lock());
 371       assert(current->waiting_for_completion_count() <= 1, "more than one thread are waiting for task");
 372       if (current->waiting_for_completion_count() > 0) {
 373         // If another thread waits for this task, we must wake them up
 374         // so they will stop waiting and free the task.
 375         current->lock()->notify();
 376         found_waiter = true;
 377       }
 378     }
 379     if (!found_waiter) {
 380       // If no one was waiting for this task, we need to free it ourselves. In this case, the task
 381       // is also certainly unlocked, because, again, there is no waiter.
 382       // Otherwise, by convention, it's the waiters responsibility to free the task.
 383       // Put the task back on the freelist.
 384       CompileTask::free(current);
 385     }
 386   }
 387   _first = nullptr;
 388   _last = nullptr;
 389 
 390   // Wake up all threads that block on the queue.
 391   MethodCompileQueue_lock->notify_all();
 392 }
 393 
 394 /**
 395  * Get the next CompileTask from a CompileQueue
 396  */
 397 CompileTask* CompileQueue::get(CompilerThread* thread) {
 398   // save methods from RedefineClasses across safepoint
 399   // across MethodCompileQueue_lock below.
 400   methodHandle save_method;
 401   methodHandle save_hot_method;
 402 
 403   MonitorLocker locker(MethodCompileQueue_lock);




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
















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




 432     if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
 433       // Still nothing to compile. Give caller a chance to stop this thread.
 434       if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
 435     }
 436   }
 437 
 438   if (CompileBroker::is_compilation_disabled_forever()) {
 439     return nullptr;
 440   }
 441 
 442   CompileTask* task;
 443   {
 444     NoSafepointVerifier nsv;
 445     task = CompilationPolicy::select_task(this);
 446     if (task != nullptr) {
 447       task = task->select_for_compilation();
 448     }
 449   }
 450 
 451   if (task != nullptr) {
 452     // Save method pointers across unlock safepoint.  The task is removed from
 453     // the compilation queue, which is walked during RedefineClasses.
 454     Thread* thread = Thread::current();
 455     save_method = methodHandle(thread, task->method());
 456     save_hot_method = methodHandle(thread, task->hot_method());
 457 
 458     remove(task);
 459   }
 460   purge_stale_tasks(); // may temporarily release MCQ lock
 461   return task;
 462 }
 463 
 464 // Clean & deallocate stale compile tasks.
 465 // Temporarily releases MethodCompileQueue lock.
 466 void CompileQueue::purge_stale_tasks() {
 467   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 468   if (_first_stale != nullptr) {
 469     // Stale tasks are purged when MCQ lock is released,
 470     // but _first_stale updates are protected by MCQ lock.
 471     // Once task processing starts and MCQ lock is released,
 472     // other compiler threads can reuse _first_stale.
 473     CompileTask* head = _first_stale;
 474     _first_stale = nullptr;
 475     {
 476       MutexUnlocker ul(MethodCompileQueue_lock);
 477       for (CompileTask* task = head; task != nullptr; ) {
 478         CompileTask* next_task = task->next();
 479         CompileTaskWrapper ctw(task); // Frees the task
 480         task->set_failure_reason("stale task");
 481         task = next_task;
 482       }
 483     }

 484   }
 485 }
 486 
 487 void CompileQueue::remove(CompileTask* task) {
 488   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 489   if (task->prev() != nullptr) {
 490     task->prev()->set_next(task->next());
 491   } else {
 492     // max is the first element
 493     assert(task == _first, "Sanity");
 494     _first = task->next();
 495   }
 496 
 497   if (task->next() != nullptr) {
 498     task->next()->set_prev(task->prev());
 499   } else {
 500     // max is the last element
 501     assert(task == _last, "Sanity");
 502     _last = task->prev();
 503   }
 504   --_size;
 505   ++_total_removed;
 506 }
 507 
 508 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
 509   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 510   remove(task);
 511 
 512   // Enqueue the task for reclamation (should be done outside MCQ lock)
 513   task->set_next(_first_stale);
 514   task->set_prev(nullptr);
 515   _first_stale = task;
 516 }
 517 
 518 // methods in the compile queue need to be marked as used on the stack
 519 // so that they don't get reclaimed by Redefine Classes
 520 void CompileQueue::mark_on_stack() {
 521   CompileTask* task = _first;
 522   while (task != nullptr) {



 523     task->mark_on_stack();
 524     task = task->next();
 525   }
 526 }
 527 
 528 
 529 CompileQueue* CompileBroker::compile_queue(int comp_level) {
 530   if (is_c2_compile(comp_level)) return _c2_compile_queue;
 531   if (is_c1_compile(comp_level)) return _c1_compile_queue;
 532   return nullptr;
 533 }
 534 
 535 CompileQueue* CompileBroker::c1_compile_queue() {
 536   return _c1_compile_queue;
 537 }
 538 
 539 CompileQueue* CompileBroker::c2_compile_queue() {
 540   return _c2_compile_queue;
 541 }
 542 
 543 void CompileBroker::print_compile_queues(outputStream* st) {
 544   st->print_cr("Current compiles: ");
 545 
 546   char buf[2000];
 547   int buflen = sizeof(buf);
 548   Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
 549 
 550   st->cr();
 551   if (_c1_compile_queue != nullptr) {
 552     _c1_compile_queue->print(st);
 553   }
 554   if (_c2_compile_queue != nullptr) {
 555     _c2_compile_queue->print(st);
 556   }









 557 }
 558 
 559 void CompileQueue::print(outputStream* st) {
 560   assert_locked_or_safepoint(MethodCompileQueue_lock);
 561   st->print_cr("%s:", name());
 562   CompileTask* task = _first;
 563   if (task == nullptr) {
 564     st->print_cr("Empty");
 565   } else {
 566     while (task != nullptr) {
 567       task->print(st, nullptr, true, true);
 568       task = task->next();
 569     }
 570   }
 571   st->cr();
 572 }
 573 
 574 void CompileQueue::print_tty() {
 575   stringStream ss;
 576   // Dump the compile queue into a buffer before locking the tty
 577   print(&ss);
 578   {
 579     ttyLocker ttyl;
 580     tty->print("%s", ss.freeze());

 607       CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
 608     }
 609     first_registration = false;
 610 #endif // COMPILER2
 611   }
 612 }
 613 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
 614 
 615 // ------------------------------------------------------------------
 616 // CompileBroker::compilation_init
 617 //
 618 // Initialize the Compilation object
 619 void CompileBroker::compilation_init(JavaThread* THREAD) {
 620   // No need to initialize compilation system if we do not use it.
 621   if (!UseCompiler) {
 622     return;
 623   }
 624   // Set the interface to the current compiler(s).
 625   _c1_count = CompilationPolicy::c1_count();
 626   _c2_count = CompilationPolicy::c2_count();


 627 
 628 #if INCLUDE_JVMCI
 629   if (EnableJVMCI) {
 630     // This is creating a JVMCICompiler singleton.
 631     JVMCICompiler* jvmci = new JVMCICompiler();
 632 
 633     if (UseJVMCICompiler) {
 634       _compilers[1] = jvmci;
 635       if (FLAG_IS_DEFAULT(JVMCIThreads)) {
 636         if (BootstrapJVMCI) {
 637           // JVMCI will bootstrap so give it more threads
 638           _c2_count = MIN2(32, os::active_processor_count());
 639         }
 640       } else {
 641         _c2_count = JVMCIThreads;
 642       }
 643       if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
 644       } else {
 645 #ifdef COMPILER1
 646         _c1_count = JVMCIHostThreads;
 647 #endif // COMPILER1
 648       }





 649     }
 650   }
 651 #endif // INCLUDE_JVMCI
 652 
 653 #ifdef COMPILER1
 654   if (_c1_count > 0) {
 655     _compilers[0] = new Compiler();
 656   }
 657 #endif // COMPILER1
 658 
 659 #ifdef COMPILER2
 660   if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
 661     if (_c2_count > 0) {
 662       _compilers[1] = new C2Compiler();
 663       // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit.
 664       // idToPhase mapping for c2 is in opto/phasetype.hpp
 665       JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)
 666     }
 667   }
 668 #endif // COMPILER2

 763     _perf_last_compile_size =
 764              PerfDataManager::create_variable(SUN_CI, "lastSize",
 765                                               PerfData::U_Bytes,
 766                                               (jlong)CompileBroker::no_compile,
 767                                               CHECK);
 768 
 769 
 770     _perf_last_failed_type =
 771              PerfDataManager::create_variable(SUN_CI, "lastFailedType",
 772                                               PerfData::U_None,
 773                                               (jlong)CompileBroker::no_compile,
 774                                               CHECK);
 775 
 776     _perf_last_invalidated_type =
 777          PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
 778                                           PerfData::U_None,
 779                                           (jlong)CompileBroker::no_compile,
 780                                           CHECK);
 781   }
 782 

 783   _initialized = true;
 784 }
 785 









 786 #if defined(ASSERT) && COMPILER2_OR_JVMCI
 787 // Entry for DeoptimizeObjectsALotThread. The threads are started in
 788 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
 789 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
 790     DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
 791     bool enter_single_loop;
 792     {
 793       MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
 794       static int single_thread_count = 0;
 795       enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
 796     }
 797     if (enter_single_loop) {
 798       dt->deoptimize_objects_alot_loop_single();
 799     } else {
 800       dt->deoptimize_objects_alot_loop_all();
 801     }
 802   }
 803 
 804 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
 805 // barrier targets a single thread which is selected round robin.

 843   if (java_lang_Thread::thread(thread_oop()) != nullptr) {
 844     assert(type == compiler_t, "should only happen with reused compiler threads");
 845     // The compiler thread hasn't actually exited yet so don't try to reuse it
 846     return nullptr;
 847   }
 848 
 849   JavaThread* new_thread = nullptr;
 850   switch (type) {
 851     case compiler_t:
 852       assert(comp != nullptr, "Compiler instance missing.");
 853       if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
 854         CompilerCounters* counters = new CompilerCounters();
 855         new_thread = new CompilerThread(queue, counters);
 856       }
 857       break;
 858 #if defined(ASSERT) && COMPILER2_OR_JVMCI
 859     case deoptimizer_t:
 860       new_thread = new DeoptimizeObjectsALotThread();
 861       break;
 862 #endif // ASSERT



 863     default:
 864       ShouldNotReachHere();
 865   }
 866 
 867   // At this point the new CompilerThread data-races with this startup
 868   // thread (which is the main thread and NOT the VM thread).
 869   // This means Java bytecodes being executed at startup can
 870   // queue compile jobs which will run at whatever default priority the
 871   // newly created CompilerThread runs at.
 872 
 873 
 874   // At this point it may be possible that no osthread was created for the
 875   // JavaThread due to lack of resources. We will handle that failure below.
 876   // Also check new_thread so that static analysis is happy.
 877   if (new_thread != nullptr && new_thread->osthread() != nullptr) {
 878 
 879     if (type == compiler_t) {
 880       CompilerThread::cast(new_thread)->set_compiler(comp);
 881     }
 882 

 922 }
 923 
 924 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
 925   char name_buffer[256];
 926   os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
 927   Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
 928   return JNIHandles::make_global(thread_oop);
 929 }
 930 
 931 static void print_compiler_threads(stringStream& msg) {
 932   if (TraceCompilerThreads) {
 933     tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
 934   }
 935   LogTarget(Debug, jit, thread) lt;
 936   if (lt.is_enabled()) {
 937     LogStream ls(lt);
 938     ls.print_cr("%s", msg.as_string());
 939   }
 940 }
 941 











 942 void CompileBroker::init_compiler_threads() {
 943   // Ensure any exceptions lead to vm_exit_during_initialization.
 944   EXCEPTION_MARK;
 945 #if !defined(ZERO)
 946   assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
 947 #endif // !ZERO
 948   // Initialize the compilation queue
 949   if (_c2_count > 0) {
 950     const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
 951     _c2_compile_queue  = new CompileQueue(name);
 952     _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
 953     _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
 954   }
 955   if (_c1_count > 0) {
 956     _c1_compile_queue  = new CompileQueue("C1 compile queue");
 957     _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
 958     _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
 959   }
 960 


















 961   for (int i = 0; i < _c2_count; i++) {
 962     // Create a name for our thread.
 963     jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
 964     _compiler2_objects[i] = thread_handle;
 965     _compiler2_logs[i] = nullptr;
 966 
 967     if (!UseDynamicNumberOfCompilerThreads || i == 0) {
 968       JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
 969       assert(ct != nullptr, "should have been handled for initial thread");
 970       _compilers[1]->set_num_compiler_threads(i + 1);
 971       if (trace_compiler_threads()) {
 972         ResourceMark rm;
 973         ThreadsListHandle tlh;  // name() depends on the TLH.
 974         assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
 975         stringStream msg;
 976         msg.print("Added initial compiler thread %s", ct->name());
 977         print_compiler_threads(msg);
 978       }
 979     }
 980   }
 981 
 982   for (int i = 0; i < _c1_count; i++) {
 983     // Create a name for our thread.
 984     jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
 985     _compiler1_objects[i] = thread_handle;
 986     _compiler1_logs[i] = nullptr;
 987 
 988     if (!UseDynamicNumberOfCompilerThreads || i == 0) {
 989       JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
 990       assert(ct != nullptr, "should have been handled for initial thread");
 991       _compilers[0]->set_num_compiler_threads(i + 1);
 992       if (trace_compiler_threads()) {
 993         ResourceMark rm;
 994         ThreadsListHandle tlh;  // name() depends on the TLH.
 995         assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
 996         stringStream msg;
 997         msg.print("Added initial compiler thread %s", ct->name());
 998         print_compiler_threads(msg);
 999       }


































1000     }
1001   }
1002 
1003   if (UsePerfData) {
1004     PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
1005   }
1006 
1007 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1008   if (DeoptimizeObjectsALot) {
1009     // Initialize and start the object deoptimizer threads
1010     const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1011     for (int count = 0; count < total_count; count++) {
1012       Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1013       jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1014       make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1015     }
1016   }
1017 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1018 }
1019 










1020 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1021 
1022   int old_c2_count = 0, new_c2_count = 0, old_c1_count = 0, new_c1_count = 0;
1023   const int c2_tasks_per_thread = 2, c1_tasks_per_thread = 4;
1024 
1025   // Quick check if we already have enough compiler threads without taking the lock.
1026   // Numbers may change concurrently, so we read them again after we have the lock.
1027   if (_c2_compile_queue != nullptr) {
1028     old_c2_count = get_c2_thread_count();
1029     new_c2_count = MIN2(_c2_count, _c2_compile_queue->size() / c2_tasks_per_thread);
1030   }
1031   if (_c1_compile_queue != nullptr) {
1032     old_c1_count = get_c1_thread_count();
1033     new_c1_count = MIN2(_c1_count, _c1_compile_queue->size() / c1_tasks_per_thread);
1034   }
1035   if (new_c2_count <= old_c2_count && new_c1_count <= old_c1_count) return;
1036 
1037   // Now, we do the more expensive operations.
1038   julong free_memory = os::free_memory();
1039   // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).

1122         stringStream msg;
1123         msg.print("Added compiler thread %s (free memory: %dMB, available profiled code cache: %dMB)",
1124                   ct->name(), (int)(free_memory/M), (int)(available_cc_p/M));
1125         print_compiler_threads(msg);
1126       }
1127     }
1128   }
1129 
1130   CompileThread_lock->unlock();
1131 }
1132 
1133 
1134 /**
1135  * Set the methods on the stack as on_stack so that redefine classes doesn't
1136  * reclaim them. This method is executed at a safepoint.
1137  */
1138 void CompileBroker::mark_on_stack() {
1139   assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1140   // Since we are at a safepoint, we do not need a lock to access
1141   // the compile queues.



1142   if (_c2_compile_queue != nullptr) {
1143     _c2_compile_queue->mark_on_stack();
1144   }
1145   if (_c1_compile_queue != nullptr) {
1146     _c1_compile_queue->mark_on_stack();
1147   }






1148 }
1149 
1150 // ------------------------------------------------------------------
1151 // CompileBroker::compile_method
1152 //
1153 // Request compilation of a method.
1154 void CompileBroker::compile_method_base(const methodHandle& method,
1155                                         int osr_bci,
1156                                         int comp_level,
1157                                         const methodHandle& hot_method,
1158                                         int hot_count,
1159                                         CompileTask::CompileReason compile_reason,

1160                                         bool blocking,
1161                                         Thread* thread) {
1162   guarantee(!method->is_abstract(), "cannot compile abstract methods");
1163   assert(method->method_holder()->is_instance_klass(),
1164          "sanity check");
1165   assert(!method->method_holder()->is_not_initialized(),
1166          "method holder must be initialized");


1167   assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1168 
1169   if (CIPrintRequests) {
1170     tty->print("request: ");
1171     method->print_short_name(tty);
1172     if (osr_bci != InvocationEntryBci) {
1173       tty->print(" osr_bci: %d", osr_bci);
1174     }
1175     tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1176     if (!hot_method.is_null()) {
1177       tty->print(" hot: ");
1178       if (hot_method() != method()) {
1179           hot_method->print_short_name(tty);
1180       } else {
1181         tty->print("yes");
1182       }
1183     }
1184     tty->cr();
1185   }
1186 
1187   // A request has been made for compilation.  Before we do any
1188   // real work, check to see if the method has been compiled
1189   // in the meantime with a definitive result.
1190   if (compilation_is_complete(method, osr_bci, comp_level)) {
1191     return;
1192   }
1193 
1194 #ifndef PRODUCT
1195   if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1196     if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1197       // Positive OSROnlyBCI means only compile that bci.  Negative means don't compile that BCI.
1198       return;
1199     }
1200   }
1201 #endif
1202 
1203   // If this method is already in the compile queue, then
1204   // we do not block the current thread.
1205   if (compilation_is_in_queue(method)) {
1206     // We may want to decay our counter a bit here to prevent
1207     // multiple denied requests for compilation.  This is an
1208     // open compilation policy issue. Note: The other possibility,
1209     // in the case that this is a blocking compile request, is to have
1210     // all subsequent blocking requesters wait for completion of
1211     // ongoing compiles. Note that in this case we'll need a protocol
1212     // for freeing the associated compile tasks. [Or we could have
1213     // a single static monitor on which all these waiters sleep.]
1214     return;
1215   }
1216 
1217   // Tiered policy requires MethodCounters to exist before adding a method to
1218   // the queue. Create if we don't have them yet.
1219   method->get_method_counters(thread);





1220 
1221   // Outputs from the following MutexLocker block:
1222   CompileTask* task     = nullptr;
1223   CompileQueue* queue  = compile_queue(comp_level);








1224 
1225   // Acquire our lock.
1226   {
1227     MutexLocker locker(thread, MethodCompileQueue_lock);
1228 
1229     // Make sure the method has not slipped into the queues since
1230     // last we checked; note that those checks were "fast bail-outs".
1231     // Here we need to be more careful, see 14012000 below.
1232     if (compilation_is_in_queue(method)) {
1233       return;
1234     }
1235 
1236     // We need to check again to see if the compilation has
1237     // completed.  A previous compilation may have registered
1238     // some result.
1239     if (compilation_is_complete(method, osr_bci, comp_level)) {
1240       return;
1241     }
1242 
1243     // We now know that this compilation is not pending, complete,
1244     // or prohibited.  Assign a compile_id to this compilation
1245     // and check to see if it is in our [Start..Stop) range.
1246     int compile_id = assign_compile_id(method, osr_bci);
1247     if (compile_id == 0) {
1248       // The compilation falls outside the allowed range.
1249       return;
1250     }
1251 
1252 #if INCLUDE_JVMCI
1253     if (UseJVMCICompiler && blocking) {
1254       // Don't allow blocking compiles for requests triggered by JVMCI.
1255       if (thread->is_Compiler_thread()) {
1256         blocking = false;
1257       }
1258 
1259       // In libjvmci, JVMCI initialization should not deadlock with other threads

1309     // <RESULT, QUEUE> :
1310     //     <0, 1> : in compile queue, but not yet compiled
1311     //     <1, 1> : compiled but queue bit not cleared
1312     //     <1, 0> : compiled and queue bit cleared
1313     // Because we first check the queue bits then check the result bits,
1314     // we are assured that we cannot introduce a duplicate task.
1315     // Note that if we did the tests in the reverse order (i.e. check
1316     // result then check queued bit), we could get the result bit before
1317     // the compilation completed, and the queue bit after the compilation
1318     // completed, and end up introducing a "duplicate" (redundant) task.
1319     // In that case, the compiler thread should first check if a method
1320     // has already been compiled before trying to compile it.
1321     // NOTE: in the event that there are multiple compiler threads and
1322     // there is de-optimization/recompilation, things will get hairy,
1323     // and in that case it's best to protect both the testing (here) of
1324     // these bits, and their updating (here and elsewhere) under a
1325     // common lock.
1326     task = create_compile_task(queue,
1327                                compile_id, method,
1328                                osr_bci, comp_level,
1329                                hot_method, hot_count, compile_reason,
1330                                blocking);












1331   }
1332 
1333   if (blocking) {
1334     wait_for_completion(task);
1335   }
1336 }
1337 
















1338 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1339                                        int comp_level,
1340                                        const methodHandle& hot_method, int hot_count,

1341                                        CompileTask::CompileReason compile_reason,
1342                                        TRAPS) {
1343   // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1344   if (!_initialized || comp_level == CompLevel_none) {
1345     return nullptr;
1346   }
1347 







1348   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1349   assert(comp != nullptr, "Ensure we have a compiler");
1350 
1351 #if INCLUDE_JVMCI
1352   if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1353     // JVMCI compilation is not yet initializable.
1354     return nullptr;
1355   }
1356 #endif
1357 
1358   DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1359   // CompileBroker::compile_method can trap and can have pending async exception.
1360   nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1361   DirectivesStack::release(directive);
1362   return nm;
1363 }
1364 
1365 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1366                                          int comp_level,
1367                                          const methodHandle& hot_method, int hot_count,

1368                                          CompileTask::CompileReason compile_reason,
1369                                          DirectiveSet* directive,
1370                                          TRAPS) {
1371 
1372   // make sure arguments make sense
1373   assert(method->method_holder()->is_instance_klass(), "not an instance method");
1374   assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1375   assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1376   assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");



1377   // return quickly if possible
1378 




1379   // lock, make sure that the compilation
1380   // isn't prohibited in a straightforward way.
1381   AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1382   if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1383     return nullptr;
1384   }
1385 
1386   if (osr_bci == InvocationEntryBci) {
1387     // standard compilation
1388     nmethod* method_code = method->code();
1389     if (method_code != nullptr) {
1390       if (compilation_is_complete(method, osr_bci, comp_level)) {
1391         return method_code;
1392       }
1393     }
1394     if (method->is_not_compilable(comp_level)) {
1395       return nullptr;
1396     }
1397   } else {
1398     // osr compilation
1399     // We accept a higher level osr method
1400     nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1401     if (nm != nullptr) return nm;
1402     if (method->is_not_osr_compilable(comp_level)) return nullptr;
1403   }
1404 
1405   assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1406   // some prerequisites that are compiler specific
1407   if (comp->is_c2() || comp->is_jvmci()) {
1408     InternalOOMEMark iom(THREAD);
1409     method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1410     // Resolve all classes seen in the signature of the method
1411     // we are compiling.
1412     Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1413   }
1414 
1415   // If the method is native, do the lookup in the thread requesting
1416   // the compilation. Native lookups can load code, which is not
1417   // permitted during compilation.
1418   //
1419   // Note: A native method implies non-osr compilation which is
1420   //       checked with an assertion at the entry of this method.
1421   if (method->is_native() && !method->is_method_handle_intrinsic()) {
1422     address adr = NativeLookup::lookup(method, THREAD);
1423     if (HAS_PENDING_EXCEPTION) {
1424       // In case of an exception looking up the method, we just forget
1425       // about it. The interpreter will kick-in and throw the exception.
1426       method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1427       CLEAR_PENDING_EXCEPTION;

1466             method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1467         return nullptr;
1468       }
1469 #endif // IA32 && !ZERO
1470 
1471       // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1472       // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1473       //
1474       // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1475       // in this case.  If we can't generate one and use it we can not execute the out-of-line method handle calls.
1476       AdapterHandlerLibrary::create_native_wrapper(method);
1477     } else {
1478       return nullptr;
1479     }
1480   } else {
1481     // If the compiler is shut off due to code cache getting full
1482     // fail out now so blocking compiles dont hang the java thread
1483     if (!should_compile_new_jobs()) {
1484       return nullptr;
1485     }
1486     bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles;
1487     compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);




1488   }
1489 
1490   // return requested nmethod
1491   // We accept a higher level osr method
1492   if (osr_bci == InvocationEntryBci) {
1493     return method->code();
1494   }
1495   return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1496 }
1497 
1498 
1499 // ------------------------------------------------------------------
1500 // CompileBroker::compilation_is_complete
1501 //
1502 // See if compilation of this method is already complete.
1503 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1504                                             int                 osr_bci,
1505                                             int                 comp_level) {






1506   bool is_osr = (osr_bci != standard_entry_bci);
1507   if (is_osr) {
1508     if (method->is_not_osr_compilable(comp_level)) {
1509       return true;
1510     } else {
1511       nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1512       return (result != nullptr);
1513     }
1514   } else {
1515     if (method->is_not_compilable(comp_level)) {
1516       return true;
1517     } else {
1518       nmethod* result = method->code();
1519       if (result == nullptr) return false;
1520       return comp_level == result->comp_level();









1521     }
1522   }
1523 }
1524 
1525 
1526 /**
1527  * See if this compilation is already requested.
1528  *
1529  * Implementation note: there is only a single "is in queue" bit
1530  * for each method.  This means that the check below is overly
1531  * conservative in the sense that an osr compilation in the queue
1532  * will block a normal compilation from entering the queue (and vice
1533  * versa).  This can be remedied by a full queue search to disambiguate
1534  * cases.  If it is deemed profitable, this may be done.
1535  */
1536 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1537   return method->queued_for_compilation();
1538 }
1539 
1540 // ------------------------------------------------------------------

1600     if (CIStart <= id && id < CIStop) {
1601       return id;
1602     }
1603   }
1604 
1605   // Method was not in the appropriate compilation range.
1606   method->set_not_compilable_quietly("Not in requested compile id range");
1607   return 0;
1608 #else
1609   // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1610   // only _compilation_id is incremented.
1611   return Atomic::add(&_compilation_id, 1);
1612 #endif
1613 }
1614 
1615 // ------------------------------------------------------------------
1616 // CompileBroker::assign_compile_id_unlocked
1617 //
1618 // Public wrapper for assign_compile_id that acquires the needed locks
1619 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1620   MutexLocker locker(thread, MethodCompileQueue_lock);
1621   return assign_compile_id(method, osr_bci);
1622 }
1623 
1624 // ------------------------------------------------------------------
1625 // CompileBroker::create_compile_task
1626 //
1627 // Create a CompileTask object representing the current request for
1628 // compilation.  Add this task to the queue.
1629 CompileTask* CompileBroker::create_compile_task(CompileQueue*       queue,
1630                                                 int                 compile_id,
1631                                                 const methodHandle& method,
1632                                                 int                 osr_bci,
1633                                                 int                 comp_level,
1634                                                 const methodHandle& hot_method,
1635                                                 int                 hot_count,

1636                                                 CompileTask::CompileReason compile_reason,

1637                                                 bool                blocking) {
1638   CompileTask* new_task = CompileTask::allocate();
1639   new_task->initialize(compile_id, method, osr_bci, comp_level,
1640                        hot_method, hot_count, compile_reason,
1641                        blocking);
1642   queue->add(new_task);
1643   return new_task;
1644 }
1645 
1646 #if INCLUDE_JVMCI
1647 // The number of milliseconds to wait before checking if
1648 // JVMCI compilation has made progress.
1649 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1650 
1651 // The number of JVMCI compilation progress checks that must fail
1652 // before unblocking a thread waiting for a blocking compilation.
1653 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1654 
1655 /**
1656  * Waits for a JVMCI compiler to complete a given task. This thread
1657  * waits until either the task completes or it sees no JVMCI compilation
1658  * progress for N consecutive milliseconds where N is
1659  * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1660  * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1661  *
1662  * @return true if this thread needs to free/recycle the task

1764  * compiler threads can start compiling.
1765  */
1766 bool CompileBroker::init_compiler_runtime() {
1767   CompilerThread* thread = CompilerThread::current();
1768   AbstractCompiler* comp = thread->compiler();
1769   // Final sanity check - the compiler object must exist
1770   guarantee(comp != nullptr, "Compiler object must exist");
1771 
1772   {
1773     // Must switch to native to allocate ci_env
1774     ThreadToNativeFromVM ttn(thread);
1775     ciEnv ci_env((CompileTask*)nullptr);
1776     // Cache Jvmti state
1777     ci_env.cache_jvmti_state();
1778     // Cache DTrace flags
1779     ci_env.cache_dtrace_flags();
1780 
1781     // Switch back to VM state to do compiler initialization
1782     ThreadInVMfromNative tv(thread);
1783 
1784     // Perform per-thread and global initializations
1785     comp->initialize();
1786   }
1787 
1788   if (comp->is_failed()) {
1789     disable_compilation_forever();
1790     // If compiler initialization failed, no compiler thread that is specific to a
1791     // particular compiler runtime will ever start to compile methods.
1792     shutdown_compiler_runtime(comp, thread);
1793     return false;
1794   }
1795 
1796   // C1 specific check
1797   if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
1798     warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1799     return false;
1800   }
1801 
1802   return true;
1803 }
1804 
1805 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
1806   BufferBlob* blob = thread->get_buffer_blob();
1807   if (blob != nullptr) {
1808     blob->purge();
1809     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1810     CodeCache::free(blob);
1811   }
1812 }
1813 
1814 /**
1815  * If C1 and/or C2 initialization failed, we shut down all compilation.
1816  * We do this to keep things simple. This can be changed if it ever turns
1817  * out to be a problem.
1818  */
1819 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1820   free_buffer_blob_if_allocated(thread);
1821 


1822   if (comp->should_perform_shutdown()) {
1823     // There are two reasons for shutting down the compiler
1824     // 1) compiler runtime initialization failed
1825     // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1826     warning("%s initialization failed. Shutting down all compilers", comp->name());
1827 
1828     // Only one thread per compiler runtime object enters here
1829     // Set state to shut down
1830     comp->set_shut_down();
1831 
1832     // Delete all queued compilation tasks to make compiler threads exit faster.
1833     if (_c1_compile_queue != nullptr) {
1834       _c1_compile_queue->free_all();
1835     }
1836 
1837     if (_c2_compile_queue != nullptr) {
1838       _c2_compile_queue->free_all();
1839     }
1840 




1841     // Set flags so that we continue execution with using interpreter only.
1842     UseCompiler    = false;
1843     UseInterpreter = true;
1844 
1845     // We could delete compiler runtimes also. However, there are references to
1846     // the compiler runtime(s) (e.g.,  nmethod::is_compiled_by_c1()) which then
1847     // fail. This can be done later if necessary.
1848   }
1849 }
1850 
1851 /**
1852  * Helper function to create new or reuse old CompileLog.
1853  */
1854 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1855   if (!LogCompilation) return nullptr;
1856 
1857   AbstractCompiler *compiler = ct->compiler();

1858   bool c1 = compiler->is_c1();
1859   jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1860   assert(compiler_objects != nullptr, "must be initialized at this point");
1861   CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1862   assert(logs != nullptr, "must be initialized at this point");
1863   int count = c1 ? _c1_count : _c2_count;
1864 





1865   // Find Compiler number by its threadObj.
1866   oop compiler_obj = ct->threadObj();
1867   int compiler_number = 0;
1868   bool found = false;
1869   for (; compiler_number < count; compiler_number++) {
1870     if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
1871       found = true;
1872       break;
1873     }
1874   }
1875   assert(found, "Compiler must exist at this point");
1876 
1877   // Determine pointer for this thread's log.
1878   CompileLog** log_ptr = &logs[compiler_number];
1879 
1880   // Return old one if it exists.
1881   CompileLog* log = *log_ptr;
1882   if (log != nullptr) {
1883     ct->init_log(log);
1884     return log;

1922     log->stamp();
1923     log->end_elem();
1924   }
1925 
1926   // If compiler thread/runtime initialization fails, exit the compiler thread
1927   if (!init_compiler_runtime()) {
1928     return;
1929   }
1930 
1931   thread->start_idle_timer();
1932 
1933   // Poll for new compilation tasks as long as the JVM runs. Compilation
1934   // should only be disabled if something went wrong while initializing the
1935   // compiler runtimes. This, in turn, should not happen. The only known case
1936   // when compiler runtime initialization fails is if there is not enough free
1937   // space in the code cache to generate the necessary stubs, etc.
1938   while (!is_compilation_disabled_forever()) {
1939     // We need this HandleMark to avoid leaking VM handles.
1940     HandleMark hm(thread);
1941 


1942     CompileTask* task = queue->get(thread);

1943     if (task == nullptr) {
1944       if (UseDynamicNumberOfCompilerThreads) {
1945         // Access compiler_count under lock to enforce consistency.
1946         MutexLocker only_one(CompileThread_lock);
1947         if (can_remove(thread, true)) {
1948           if (trace_compiler_threads()) {
1949             ResourceMark rm;
1950             stringStream msg;
1951             msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1952                       thread->name(), thread->idle_time_millis());
1953             print_compiler_threads(msg);
1954           }
1955 
1956           // Notify compiler that the compiler thread is about to stop
1957           thread->compiler()->stopping_compiler_thread(thread);
1958 
1959           free_buffer_blob_if_allocated(thread);
1960           return; // Stop this thread.
1961         }
1962       }
1963     } else {
1964       // Assign the task to the current thread.  Mark this compilation
1965       // thread as active for the profiler.
1966       // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1967       // occurs after fetching the compile task off the queue.
1968       CompileTaskWrapper ctw(task);
1969       methodHandle method(thread, task->method());
1970 
1971       // Never compile a method if breakpoints are present in it
1972       if (method()->number_of_breakpoints() == 0) {
1973         // Compile the method.
1974         if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1975           invoke_compiler_on_method(task);
1976           thread->start_idle_timer();
1977         } else {
1978           // After compilation is disabled, remove remaining methods from queue
1979           method->clear_queued_for_compilation();

1980           task->set_failure_reason("compilation is disabled");
1981         }
1982       } else {
1983         task->set_failure_reason("breakpoints are present");
1984       }
1985 
1986       if (UseDynamicNumberOfCompilerThreads) {
1987         possibly_add_compiler_threads(thread);
1988         assert(!thread->has_pending_exception(), "should have been handled");
1989       }
1990     }
1991   }
1992 
1993   // Shut down compiler runtime
1994   shutdown_compiler_runtime(thread->compiler(), thread);
1995 }
1996 
1997 // ------------------------------------------------------------------
1998 // CompileBroker::init_compiler_thread_log
1999 //

2162 
2163 // Acquires Compilation_lock and waits for it to be notified
2164 // as long as WhiteBox::compilation_locked is true.
2165 static void whitebox_lock_compilation() {
2166   MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2167   while (WhiteBox::compilation_locked) {
2168     locker.wait();
2169   }
2170 }
2171 
2172 // ------------------------------------------------------------------
2173 // CompileBroker::invoke_compiler_on_method
2174 //
2175 // Compile a method.
2176 //
2177 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2178   task->print_ul();
2179   elapsedTimer time;
2180 
2181   DirectiveSet* directive = task->directive();
2182   if (directive->PrintCompilationOption) {
2183     ResourceMark rm;
2184     task->print_tty();
2185   }
2186 
2187   CompilerThread* thread = CompilerThread::current();
2188   ResourceMark rm(thread);
2189 
2190   if (CompilationLog::log() != nullptr) {
2191     CompilationLog::log()->log_compile(thread, task);
2192   }
2193 
2194   // Common flags.
2195   int compile_id = task->compile_id();
2196   int osr_bci = task->osr_bci();
2197   bool is_osr = (osr_bci != standard_entry_bci);
2198   bool should_log = (thread->log() != nullptr);
2199   bool should_break = false;

2200   const int task_level = task->comp_level();
2201   AbstractCompiler* comp = task->compiler();
2202   {
2203     // create the handle inside it's own block so it can't
2204     // accidentally be referenced once the thread transitions to
2205     // native.  The NoHandleMark before the transition should catch
2206     // any cases where this occurs in the future.
2207     methodHandle method(thread, task->method());
2208 
2209     assert(!method->is_native(), "no longer compile natives");
2210 
2211     // Update compile information when using perfdata.
2212     if (UsePerfData) {
2213       update_compile_perf_data(thread, method, is_osr);
2214     }
2215 
2216     DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2217   }
2218 
2219   should_break = directive->BreakAtCompileOption || task->check_break_at_flags();

2305     }
2306     assert(thread->env() == &ci_env, "set by ci_env");
2307     // The thread-env() field is cleared in ~CompileTaskWrapper.
2308 
2309     // Cache Jvmti state
2310     bool method_is_old = ci_env.cache_jvmti_state();
2311 
2312     // Skip redefined methods
2313     if (method_is_old) {
2314       ci_env.record_method_not_compilable("redefined method", true);
2315     }
2316 
2317     // Cache DTrace flags
2318     ci_env.cache_dtrace_flags();
2319 
2320     ciMethod* target = ci_env.get_method_from_handle(target_handle);
2321 
2322     TraceTime t1("compilation", &time);
2323     EventCompilation event;
2324 

2325     if (comp == nullptr) {
2326       ci_env.record_method_not_compilable("no compiler");
2327     } else if (!ci_env.failing()) {
2328       if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2329         whitebox_lock_compilation();
2330       }
2331       comp->compile_method(&ci_env, target, osr_bci, true, directive);



2332 
2333       /* Repeat compilation without installing code for profiling purposes */
2334       int repeat_compilation_count = directive->RepeatCompilationOption;
2335       while (repeat_compilation_count > 0) {
2336         ResourceMark rm(thread);
2337         task->print_ul("NO CODE INSTALLED");
2338         comp->compile_method(&ci_env, target, osr_bci, false, directive);
2339         repeat_compilation_count--;
2340       }
2341     }
2342 
2343     DirectivesStack::release(directive);
2344 
2345     if (!ci_env.failing() && !task->is_success()) {
2346       assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2347       assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2348       // The compiler elected, without comment, not to register a result.
2349       // Do not attempt further compilations of this method.
2350       ci_env.record_method_not_compilable("compile failed");
2351     }
2352 
2353     // Copy this bit to the enclosing block:
2354     compilable = ci_env.compilable();
2355 
2356     if (ci_env.failing()) {
2357       // Duplicate the failure reason string, so that it outlives ciEnv
2358       failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2359       failure_reason_on_C_heap = true;
2360       retry_message = ci_env.retry_message();
2361       ci_env.report_failure(failure_reason);
2362     }
2363 
2364     if (ci_env.failing()) {
2365       handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2366     }
2367     if (event.should_commit()) {
2368       post_compilation_event(event, task);
2369     }
2370   }
2371 
2372   if (failure_reason != nullptr) {
2373     task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2374     if (CompilationLog::log() != nullptr) {
2375       CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2376     }
2377     if (PrintCompilation) {
2378       FormatBufferResource msg = retry_message != nullptr ?
2379         FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2380         FormatBufferResource("COMPILE SKIPPED: %s",      failure_reason);
2381       task->print(tty, msg);
2382     }
2383   }
2384 


2385   methodHandle method(thread, task->method());
2386 
2387   DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2388 
2389   collect_statistics(thread, time, task);
2390 
2391   if (PrintCompilation && PrintCompilation2) {
2392     tty->print("%7d ", (int) tty->time_stamp().milliseconds());  // print timestamp
2393     tty->print("%4d ", compile_id);    // print compilation number
2394     tty->print("%s ", (is_osr ? "%" : " "));
2395     if (task->is_success()) {
2396       tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2397     }
2398     tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2399   }
2400 
2401   Log(compilation, codecache) log;
2402   if (log.is_debug()) {
2403     LogStream ls(log.debug());
2404     codecache_print(&ls, /* detailed= */ false);
2405   }
2406   if (PrintCodeCacheOnCompilation) {
2407     codecache_print(/* detailed= */ false);
2408   }
2409   // Disable compilation, if required.
2410   switch (compilable) {
2411   case ciEnv::MethodCompilable_never:
2412     if (is_osr)
2413       method->set_not_osr_compilable_quietly("MethodCompilable_never");
2414     else
2415       method->set_not_compilable_quietly("MethodCompilable_never");
2416     break;
2417   case ciEnv::MethodCompilable_not_at_tier:
2418     if (is_osr)
2419       method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2420     else
2421       method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2422     break;
2423   }
2424 
2425   // Note that the queued_for_compilation bits are cleared without
2426   // protection of a mutex. [They were set by the requester thread,
2427   // when adding the task to the compile queue -- at which time the
2428   // compile queue lock was held. Subsequently, we acquired the compile
2429   // queue lock to get this task off the compile queue; thus (to belabour
2430   // the point somewhat) our clearing of the bits must be occurring
2431   // only after the setting of the bits. See also 14012000 above.
2432   method->clear_queued_for_compilation();






2433 }
2434 
2435 /**
2436  * The CodeCache is full. Print warning and disable compilation.
2437  * Schedule code cache cleaning so compilation can continue later.
2438  * This function needs to be called only from CodeCache::allocate(),
2439  * since we currently handle a full code cache uniformly.
2440  */
2441 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2442   UseInterpreter = true;
2443   if (UseCompiler || AlwaysCompileLoopMethods ) {
2444     if (xtty != nullptr) {
2445       stringStream s;
2446       // Dump code cache state into a buffer before locking the tty,
2447       // because log_state() will use locks causing lock conflicts.
2448       CodeCache::log_state(&s);
2449       // Lock to prevent tearing
2450       ttyLocker ttyl;
2451       xtty->begin_elem("code_cache_full");
2452       xtty->print("%s", s.freeze());

2525 // CompileBroker::collect_statistics
2526 //
2527 // Collect statistics about the compilation.
2528 
2529 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2530   bool success = task->is_success();
2531   methodHandle method (thread, task->method());
2532   int compile_id = task->compile_id();
2533   bool is_osr = (task->osr_bci() != standard_entry_bci);
2534   const int comp_level = task->comp_level();
2535   CompilerCounters* counters = thread->counters();
2536 
2537   MutexLocker locker(CompileStatistics_lock);
2538 
2539   // _perf variables are production performance counters which are
2540   // updated regardless of the setting of the CITime and CITimeEach flags
2541   //
2542 
2543   // account all time, including bailouts and failures in this counter;
2544   // C1 and C2 counters are counting both successful and unsuccessful compiles
2545   _t_total_compilation.add(time);
2546 
2547   // Update compilation times. Used by the implementation of JFR CompilerStatistics
2548   // and java.lang.management.CompilationMXBean.
2549   _perf_total_compilation->inc(time.ticks());
2550   _peak_compilation_time = MAX2(time.milliseconds(), _peak_compilation_time);
2551 
2552   if (!success) {
2553     _total_bailout_count++;
2554     if (UsePerfData) {
2555       _perf_last_failed_method->set_value(counters->current_method());
2556       _perf_last_failed_type->set_value(counters->compile_type());
2557       _perf_total_bailout_count->inc();
2558     }
2559     _t_bailedout_compilation.add(time);











2560   } else if (!task->is_success()) {
2561     if (UsePerfData) {
2562       _perf_last_invalidated_method->set_value(counters->current_method());
2563       _perf_last_invalidated_type->set_value(counters->compile_type());
2564       _perf_total_invalidated_count->inc();
2565     }
2566     _total_invalidated_count++;
2567     _t_invalidated_compilation.add(time);











2568   } else {
2569     // Compilation succeeded
2570     if (CITime) {
2571       int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2572       if (is_osr) {
2573         _t_osr_compilation.add(time);
2574         _sum_osr_bytes_compiled += bytes_compiled;
2575       } else {
2576         _t_standard_compilation.add(time);
2577         _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2578       }
2579 
2580       // Collect statistic per compilation level
2581       if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {









2582         CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2583         if (is_osr) {
2584           stats->_osr.update(time, bytes_compiled);
2585         } else {
2586           stats->_standard.update(time, bytes_compiled);
2587         }
2588         stats->_nmethods_size += task->nm_total_size();
2589         stats->_nmethods_code_size += task->nm_insts_size();
2590       } else {
2591         assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2592       }
2593 
2594       // Collect statistic per compiler
2595       AbstractCompiler* comp = compiler(comp_level);
2596       if (comp) {
2597         CompilerStatistics* stats = comp->stats();
2598         if (is_osr) {
2599           stats->_osr.update(time, bytes_compiled);
2600         } else {
2601           stats->_standard.update(time, bytes_compiled);
2602         }
2603         stats->_nmethods_size += task->nm_total_size();
2604         stats->_nmethods_code_size += task->nm_insts_size();
2605       } else { // if (!comp)
2606         assert(false, "Compiler object must exist");
2607       }
2608     }
2609 
2610     if (UsePerfData) {
2611       // save the name of the last method compiled
2612       _perf_last_method->set_value(counters->current_method());
2613       _perf_last_compile_type->set_value(counters->compile_type());
2614       _perf_last_compile_size->set_value(method->code_size() +
2615                                          task->num_inlined_bytecodes());
2616       if (is_osr) {
2617         _perf_osr_compilation->inc(time.ticks());
2618         _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2619       } else {
2620         _perf_standard_compilation->inc(time.ticks());
2621         _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2622       }
2623     }
2624 
2625     if (CITimeEach) {

2648       _total_standard_compile_count++;
2649     }
2650   }
2651   // set the current method for the thread to null
2652   if (UsePerfData) counters->set_current_method("");
2653 }
2654 
2655 const char* CompileBroker::compiler_name(int comp_level) {
2656   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2657   if (comp == nullptr) {
2658     return "no compiler";
2659   } else {
2660     return (comp->name());
2661   }
2662 }
2663 
2664 jlong CompileBroker::total_compilation_ticks() {
2665   return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2666 }
2667 


















2668 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
2669   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}",
2670                 name, stats->bytes_per_second(),
2671                 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2672                 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2673                 stats->_nmethods_size, stats->_nmethods_code_size);
2674 }
2675 












































































































2676 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2677   if (per_compiler) {
2678     if (aggregate) {
2679       tty->cr();
2680       tty->print_cr("Individual compiler times (for compiled methods only)");
2681       tty->print_cr("------------------------------------------------");
2682       tty->cr();
2683     }
2684     for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2685       AbstractCompiler* comp = _compilers[i];
2686       if (comp != nullptr) {
2687         print_times(comp->name(), comp->stats());
2688       }
2689     }



2690     if (aggregate) {
2691       tty->cr();
2692       tty->print_cr("Individual compilation Tier times (for compiled methods only)");
2693       tty->print_cr("------------------------------------------------");
2694       tty->cr();
2695     }
2696     char tier_name[256];
2697     for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
2698       CompilerStatistics* stats = &_stats_per_level[tier-1];
2699       os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
2700       print_times(tier_name, stats);
2701     }







2702   }
2703 
2704   if (!aggregate) {
2705     return;
2706   }
2707 
2708   elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2709   elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2710   elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2711 
2712   uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2713   uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2714 
2715   uint standard_compile_count = CompileBroker::_total_standard_compile_count;
2716   uint osr_compile_count = CompileBroker::_total_osr_compile_count;
2717   uint total_compile_count = CompileBroker::_total_compile_count;
2718   uint total_bailout_count = CompileBroker::_total_bailout_count;
2719   uint total_invalidated_count = CompileBroker::_total_invalidated_count;
2720 
2721   uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;

2723 
2724   tty->cr();
2725   tty->print_cr("Accumulated compiler times");
2726   tty->print_cr("----------------------------------------------------------");
2727                //0000000000111111111122222222223333333333444444444455555555556666666666
2728                //0123456789012345678901234567890123456789012345678901234567890123456789
2729   tty->print_cr("  Total compilation time   : %7.3f s", total_compilation.seconds());
2730   tty->print_cr("    Standard compilation   : %7.3f s, Average : %2.3f s",
2731                 standard_compilation.seconds(),
2732                 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
2733   tty->print_cr("    Bailed out compilation : %7.3f s, Average : %2.3f s",
2734                 CompileBroker::_t_bailedout_compilation.seconds(),
2735                 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
2736   tty->print_cr("    On stack replacement   : %7.3f s, Average : %2.3f s",
2737                 osr_compilation.seconds(),
2738                 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
2739   tty->print_cr("    Invalidated            : %7.3f s, Average : %2.3f s",
2740                 CompileBroker::_t_invalidated_compilation.seconds(),
2741                 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
2742 




2743   AbstractCompiler *comp = compiler(CompLevel_simple);
2744   if (comp != nullptr) {
2745     tty->cr();
2746     comp->print_timers();
2747   }
2748   comp = compiler(CompLevel_full_optimization);
2749   if (comp != nullptr) {
2750     tty->cr();
2751     comp->print_timers();
2752   }





2753 #if INCLUDE_JVMCI
2754   if (EnableJVMCI) {
2755     JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
2756     if (jvmci_comp != nullptr && jvmci_comp != comp) {
2757       tty->cr();
2758       jvmci_comp->print_timers();
2759     }
2760   }
2761 #endif
2762 
2763   tty->cr();
2764   tty->print_cr("  Total compiled methods    : %8u methods", total_compile_count);
2765   tty->print_cr("    Standard compilation    : %8u methods", standard_compile_count);
2766   tty->print_cr("    On stack replacement    : %8u methods", osr_compile_count);
2767   uint tcb = osr_bytes_compiled + standard_bytes_compiled;
2768   tty->print_cr("  Total compiled bytecodes  : %8u bytes", tcb);
2769   tty->print_cr("    Standard compilation    : %8u bytes", standard_bytes_compiled);
2770   tty->print_cr("    On stack replacement    : %8u bytes", osr_bytes_compiled);
2771   double tcs = total_compilation.seconds();
2772   uint bps = tcs == 0.0 ? 0 : (uint)(tcb / tcs);

   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/codeCache.hpp"
  32 #include "code/codeHeapState.hpp"
  33 #include "code/dependencyContext.hpp"
  34 #include "code/SCCache.hpp"
  35 #include "compiler/compilationLog.hpp"
  36 #include "compiler/compilationMemoryStatistic.hpp"
  37 #include "compiler/compilationPolicy.hpp"
  38 #include "compiler/compileBroker.hpp"
  39 #include "compiler/compilerDefinitions.inline.hpp"
  40 #include "compiler/compileLog.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 "jvm.h"
  48 #include "jfr/jfrEvents.hpp"
  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/methodData.hpp"
  55 #include "oops/method.inline.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();                           \

 116     HOTSPOT_METHOD_COMPILE_END(                                          \
 117       (char *) comp_name, strlen(comp_name),                             \
 118       (char *) klass_name->bytes(), klass_name->utf8_length(),           \
 119       (char *) name->bytes(), name->utf8_length(),                       \
 120       (char *) signature->bytes(), signature->utf8_length(), (success)); \
 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[3];
 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::_c3_count = 0;
 142 int CompileBroker::_sc_count = 0;
 143 
 144 // An array of compiler names as Java String objects
 145 jobject* CompileBroker::_compiler1_objects = nullptr;
 146 jobject* CompileBroker::_compiler2_objects = nullptr;
 147 jobject* CompileBroker::_compiler3_objects = nullptr;
 148 jobject* CompileBroker::_sc_objects = nullptr;
 149 
 150 CompileLog** CompileBroker::_compiler1_logs = nullptr;
 151 CompileLog** CompileBroker::_compiler2_logs = nullptr;
 152 CompileLog** CompileBroker::_compiler3_logs = nullptr;
 153 CompileLog** CompileBroker::_sc_logs = nullptr;
 154 
 155 // These counters are used to assign an unique ID to each compilation.
 156 volatile jint CompileBroker::_compilation_id     = 0;
 157 volatile jint CompileBroker::_osr_compilation_id = 0;
 158 volatile jint CompileBroker::_native_compilation_id = 0;
 159 
 160 // Performance counters
 161 PerfCounter* CompileBroker::_perf_total_compilation = nullptr;
 162 PerfCounter* CompileBroker::_perf_osr_compilation = nullptr;
 163 PerfCounter* CompileBroker::_perf_standard_compilation = nullptr;
 164 
 165 PerfCounter* CompileBroker::_perf_total_bailout_count = nullptr;
 166 PerfCounter* CompileBroker::_perf_total_invalidated_count = nullptr;
 167 PerfCounter* CompileBroker::_perf_total_compile_count = nullptr;
 168 PerfCounter* CompileBroker::_perf_total_osr_compile_count = nullptr;
 169 PerfCounter* CompileBroker::_perf_total_standard_compile_count = nullptr;
 170 
 171 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = nullptr;
 172 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = nullptr;
 173 PerfCounter* CompileBroker::_perf_sum_nmethod_size = nullptr;
 174 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = nullptr;
 175 
 176 PerfStringVariable* CompileBroker::_perf_last_method = nullptr;
 177 PerfStringVariable* CompileBroker::_perf_last_failed_method = nullptr;
 178 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = nullptr;
 179 PerfVariable*       CompileBroker::_perf_last_compile_type = nullptr;
 180 PerfVariable*       CompileBroker::_perf_last_compile_size = nullptr;
 181 PerfVariable*       CompileBroker::_perf_last_failed_type = nullptr;
 182 PerfVariable*       CompileBroker::_perf_last_invalidated_type = nullptr;
 183 
 184 // Timers and counters for generating statistics
 185 elapsedTimer CompileBroker::_t_total_compilation;
 186 elapsedTimer CompileBroker::_t_osr_compilation;
 187 elapsedTimer CompileBroker::_t_standard_compilation;
 188 elapsedTimer CompileBroker::_t_invalidated_compilation;
 189 elapsedTimer CompileBroker::_t_bailedout_compilation;
 190 
 191 uint CompileBroker::_total_bailout_count            = 0;
 192 uint CompileBroker::_total_invalidated_count        = 0;
 193 uint CompileBroker::_total_not_entrant_count        = 0;
 194 uint CompileBroker::_total_compile_count            = 0;
 195 uint CompileBroker::_total_osr_compile_count        = 0;
 196 uint CompileBroker::_total_standard_compile_count   = 0;
 197 uint CompileBroker::_total_compiler_stopped_count   = 0;
 198 uint CompileBroker::_total_compiler_restarted_count = 0;
 199 
 200 uint CompileBroker::_sum_osr_bytes_compiled         = 0;
 201 uint CompileBroker::_sum_standard_bytes_compiled    = 0;
 202 uint CompileBroker::_sum_nmethod_size               = 0;
 203 uint CompileBroker::_sum_nmethod_code_size          = 0;
 204 
 205 jlong CompileBroker::_peak_compilation_time        = 0;
 206 
 207 CompilerStatistics CompileBroker::_stats_per_level[CompLevel_full_optimization];
 208 CompilerStatistics CompileBroker::_scc_stats;
 209 CompilerStatistics CompileBroker::_scc_stats_per_level[CompLevel_full_optimization + 1];
 210 
 211 CompileQueue* CompileBroker::_c3_compile_queue     = nullptr;
 212 CompileQueue* CompileBroker::_c2_compile_queue     = nullptr;
 213 CompileQueue* CompileBroker::_c1_compile_queue     = nullptr;
 214 CompileQueue* CompileBroker::_sc1_compile_queue    = nullptr;
 215 CompileQueue* CompileBroker::_sc2_compile_queue    = nullptr;
 216 
 217 bool compileBroker_init() {
 218   if (LogEvents) {
 219     CompilationLog::init();
 220   }
 221 
 222   // init directives stack, adding default directive
 223   DirectivesStack::init();
 224 
 225   if (DirectivesParser::has_file()) {
 226     return DirectivesParser::parse_from_flag();
 227   } else if (CompilerDirectivesPrint) {
 228     // Print default directive even when no other was added
 229     DirectivesStack::print(tty);
 230   }
 231 
 232   return true;
 233 }
 234 
 235 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
 236   CompilerThread* thread = CompilerThread::current();
 237   thread->set_task(task);
 238   CompileLog*     log  = thread->log();
 239   if (log != nullptr && !task->is_unloaded())  task->log_task_start(log);
 240 }
 241 
 242 CompileTaskWrapper::~CompileTaskWrapper() {
 243   CompilerThread* thread = CompilerThread::current();
 244   CompileTask* task = thread->task();
 245   CompileLog*  log  = thread->log();
 246   AbstractCompiler* comp = thread->compiler();
 247   if (log != nullptr && !task->is_unloaded())  task->log_task_done(log);
 248   thread->set_task(nullptr);
 249   thread->set_env(nullptr);
 250   if (task->is_blocking()) {
 251     bool free_task = false;
 252     {
 253       MutexLocker notifier(thread, task->lock());
 254       task->mark_complete();
 255 #if INCLUDE_JVMCI
 256       if (comp->is_jvmci()) {
 257         if (!task->has_waiter()) {
 258           // The waiting thread timed out and thus did not free the task.
 259           free_task = true;
 260         }
 261         task->set_blocking_jvmci_compile_state(nullptr);
 262       }
 263 #endif
 264       if (!free_task) {
 265         // Notify the waiting thread that the compilation has completed
 266         // so that it can free the task.
 267         task->lock()->notify_all();
 268       }
 269     }
 270     if (free_task) {
 271       // The task can only be freed once the task lock is released.
 272       CompileTask::free(task);
 273     }
 274   } else {
 275     task->mark_complete();
 276 
 277     // By convention, the compiling thread is responsible for
 278     // recycling a non-blocking CompileTask.
 279     CompileTask::free(task);
 280   }
 281 }
 282 
 283 /**
 284  * Check if a CompilerThread can be removed and update count if requested.
 285  */
 286 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
 287   assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
 288   if (!ReduceNumberOfCompilerThreads) return false;
 289 
 290   if (RecompilationPolicy::have_recompilation_work()) return false;
 291 
 292   AbstractCompiler *compiler = ct->compiler();
 293   int compiler_count = compiler->num_compiler_threads();
 294   bool c1 = compiler->is_c1();
 295 
 296   // Keep at least 1 compiler thread of each type.
 297   if (compiler_count < 2) return false;
 298 
 299   // Keep thread alive for at least some time.
 300   if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
 301 
 302 #if INCLUDE_JVMCI
 303   if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
 304     // Handles for JVMCI thread objects may get released concurrently.
 305     if (do_it) {
 306       assert(CompileThread_lock->owner() == ct, "must be holding lock");
 307     } else {
 308       // Skip check if it's the last thread and let caller check again.
 309       return true;
 310     }
 311   }

 318     if (do_it) {
 319       assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
 320       compiler->set_num_compiler_threads(compiler_count - 1);
 321 #if INCLUDE_JVMCI
 322       if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
 323         // Old j.l.Thread object can die when no longer referenced elsewhere.
 324         JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
 325         _compiler2_objects[compiler_count - 1] = nullptr;
 326       }
 327 #endif
 328     }
 329     return true;
 330   }
 331   return false;
 332 }
 333 
 334 /**
 335  * Add a CompileTask to a CompileQueue.
 336  */
 337 void CompileQueue::add(CompileTask* task) {
 338   assert(_lock->owned_by_self(), "must own lock");
 339 
 340   task->set_next(nullptr);
 341   task->set_prev(nullptr);
 342 
 343   if (_last == nullptr) {
 344     // The compile queue is empty.
 345     assert(_first == nullptr, "queue is empty");
 346     _first = task;
 347     _last = task;
 348   } else {
 349     // Append the task to the queue.
 350     assert(_last->next() == nullptr, "not last");
 351     _last->set_next(task);
 352     task->set_prev(_last);
 353     _last = task;
 354   }
 355   ++_size;
 356   ++_total_added;
 357   if (_size > _peak_size) {
 358     _peak_size = _size;
 359   }
 360 
 361   // Mark the method as being in the compile queue.
 362   task->method()->set_queued_for_compilation();
 363 
 364   task->mark_queued(os::elapsed_counter());
 365 
 366   if (CIPrintCompileQueue) {
 367     print_tty();
 368   }
 369 
 370   if (LogCompilation && xtty != nullptr) {
 371     task->log_task_queued();
 372   }
 373 
 374   if (TrainingData::need_data() && !CDSConfig::is_dumping_final_static_archive()) {
 375     CompileTrainingData* td = CompileTrainingData::make(task);
 376     if (td != nullptr) {
 377       task->set_training_data(td);
 378     }
 379   }
 380 
 381   // Notify CompilerThreads that a task is available.
 382   _lock->notify_all();
 383 }
 384 
 385 void CompileQueue::add_pending(CompileTask* task) {
 386   assert(_lock->owned_by_self() == false, "must NOT own lock");
 387   assert(UseLockFreeCompileQueues, "");
 388   task->method()->set_queued_for_compilation();
 389   _queue.push(*task);
 390   // FIXME: additional coordination needed? e.g., is it possible for compiler thread to block w/o processing pending tasks?
 391   if (is_empty()) {
 392     MutexLocker ml(_lock);
 393     _lock->notify_all();
 394   }
 395 }
 396 
 397 static bool process_pending(CompileTask* task) {
 398 //  guarantee(task->method()->queued_for_compilation(), "");
 399   if (task->is_unloaded()) {
 400     return true; // unloaded
 401   }
 402   task->method()->set_queued_for_compilation(); // FIXME
 403   if (task->method()->pending_queue_processed()) {
 404     return true; // already queued
 405   }
 406   // Mark the method as being in the compile queue.
 407   task->method()->set_pending_queue_processed();
 408   if (CompileBroker::compilation_is_complete(task->method(), task->osr_bci(), task->comp_level(),
 409                                              task->requires_online_compilation(), task->compile_reason())) {
 410     return true; // already compiled
 411   }
 412   return false; // active
 413 }
 414 
 415 void CompileQueue::transfer_pending() {
 416   assert(_lock->owned_by_self(), "must own lock");
 417 
 418   CompileTask* task;
 419   while ((task = _queue.pop()) != nullptr) {
 420     bool is_stale = process_pending(task);
 421     if (is_stale) {
 422       task->set_next(_first_stale);
 423       task->set_prev(nullptr);
 424       _first_stale = task;
 425     } else {
 426       add(task);
 427     }
 428   }
 429 }
 430 
 431 /**
 432  * Empties compilation queue by putting all compilation tasks onto
 433  * a freelist. Furthermore, the method wakes up all threads that are
 434  * waiting on a compilation task to finish. This can happen if background
 435  * compilation is disabled.
 436  */
 437 void CompileQueue::free_all() {
 438   MutexLocker mu(_lock);
 439   transfer_pending();
 440 
 441   CompileTask* next = _first;
 442 
 443   // Iterate over all tasks in the compile queue
 444   while (next != nullptr) {
 445     CompileTask* current = next;
 446     next = current->next();
 447     bool found_waiter = false;
 448     {
 449       MutexLocker ct_lock(current->lock());
 450       assert(current->waiting_for_completion_count() <= 1, "more than one thread are waiting for task");
 451       if (current->waiting_for_completion_count() > 0) {
 452         // If another thread waits for this task, we must wake them up
 453         // so they will stop waiting and free the task.
 454         current->lock()->notify();
 455         found_waiter = true;
 456       }
 457     }
 458     if (!found_waiter) {
 459       // If no one was waiting for this task, we need to free it ourselves. In this case, the task
 460       // is also certainly unlocked, because, again, there is no waiter.
 461       // Otherwise, by convention, it's the waiters responsibility to free the task.
 462       // Put the task back on the freelist.
 463       CompileTask::free(current);
 464     }
 465   }
 466   _first = nullptr;
 467   _last = nullptr;
 468 
 469   // Wake up all threads that block on the queue.
 470   _lock->notify_all();
 471 }
 472 
 473 /**
 474  * Get the next CompileTask from a CompileQueue
 475  */
 476 CompileTask* CompileQueue::get(CompilerThread* thread) {
 477   // save methods from RedefineClasses across safepoint
 478   // across compile queue lock below.
 479   methodHandle save_method;
 480   methodHandle save_hot_method;
 481 
 482   MonitorLocker locker(_lock);
 483   transfer_pending();
 484 
 485   RecompilationPolicy::sample_load_average();
 486 
 487   // If _first is null we have no more compile jobs. There are two reasons for
 488   // having no compile jobs: First, we compiled everything we wanted. Second,
 489   // we ran out of code cache so compilation has been disabled. In the latter
 490   // case we perform code cache sweeps to free memory such that we can re-enable
 491   // compilation.
 492   while (_first == nullptr) {
 493     // Exit loop if compilation is disabled forever
 494     if (CompileBroker::is_compilation_disabled_forever()) {
 495       return nullptr;
 496     }
 497 
 498     AbstractCompiler* compiler = thread->compiler();
 499     guarantee(compiler != nullptr, "Compiler object must exist");
 500     compiler->on_empty_queue(this, thread);
 501     if (_first != nullptr) {
 502       // The call to on_empty_queue may have temporarily unlocked the MCQ lock
 503       // so check again whether any tasks were added to the queue.
 504       break;
 505     }
 506 
 507     // If we have added stale tasks, there might be waiters that want
 508     // the notification these tasks have failed. Normally, this would
 509     // be done by a compiler thread that would perform the purge at
 510     // the end of some compilation. But, if compile queue is empty,
 511     // there is no guarantee compilers would run and do the purge.
 512     // Do the purge here and now to unblock the waiters.
 513     // Perform this until we run out of stale tasks.
 514     while (_first_stale != nullptr) {
 515       purge_stale_tasks();
 516     }
 517     if (_first != nullptr) {
 518       // Purge stale tasks may have transferred some new tasks,
 519       // so check again.
 520       break;
 521     }
 522 
 523     // If there are no compilation tasks and we can compile new jobs
 524     // (i.e., there is enough free space in the code cache) there is
 525     // no need to invoke the GC.
 526     // We need a timed wait here, since compiler threads can exit if compilation
 527     // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
 528     // is not critical and we do not want idle compiler threads to wake up too often.
 529     locker.wait(5*1000);
 530 
 531     transfer_pending(); // reacquired lock
 532 
 533     if (RecompilationPolicy::have_recompilation_work()) return nullptr;
 534 
 535     if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
 536       // Still nothing to compile. Give caller a chance to stop this thread.
 537       if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
 538     }
 539   }
 540 
 541   if (CompileBroker::is_compilation_disabled_forever()) {
 542     return nullptr;
 543   }
 544 
 545   CompileTask* task;
 546   {
 547     NoSafepointVerifier nsv;
 548     task = CompilationPolicy::select_task(this, thread);
 549     if (task != nullptr) {
 550       task = task->select_for_compilation();
 551     }
 552   }
 553 
 554   if (task != nullptr) {
 555     // Save method pointers across unlock safepoint.  The task is removed from
 556     // the compilation queue, which is walked during RedefineClasses.
 557     Thread* thread = Thread::current();
 558     save_method = methodHandle(thread, task->method());
 559     save_hot_method = methodHandle(thread, task->hot_method());
 560 
 561     remove(task);
 562   }
 563   purge_stale_tasks(); // may temporarily release MCQ lock
 564   return task;
 565 }
 566 
 567 // Clean & deallocate stale compile tasks.
 568 // Temporarily releases MethodCompileQueue lock.
 569 void CompileQueue::purge_stale_tasks() {
 570   assert(_lock->owned_by_self(), "must own lock");
 571   if (_first_stale != nullptr) {
 572     // Stale tasks are purged when MCQ lock is released,
 573     // but _first_stale updates are protected by MCQ lock.
 574     // Once task processing starts and MCQ lock is released,
 575     // other compiler threads can reuse _first_stale.
 576     CompileTask* head = _first_stale;
 577     _first_stale = nullptr;
 578     {
 579       MutexUnlocker ul(_lock);
 580       for (CompileTask* task = head; task != nullptr; ) {
 581         CompileTask* next_task = task->next();
 582         CompileTaskWrapper ctw(task); // Frees the task
 583         task->set_failure_reason("stale task");
 584         task = next_task;
 585       }
 586     }
 587     transfer_pending(); // transfer pending after reacquiring MCQ lock
 588   }
 589 }
 590 
 591 void CompileQueue::remove(CompileTask* task) {
 592   assert(_lock->owned_by_self(), "must own lock");
 593   if (task->prev() != nullptr) {
 594     task->prev()->set_next(task->next());
 595   } else {
 596     // max is the first element
 597     assert(task == _first, "Sanity");
 598     _first = task->next();
 599   }
 600 
 601   if (task->next() != nullptr) {
 602     task->next()->set_prev(task->prev());
 603   } else {
 604     // max is the last element
 605     assert(task == _last, "Sanity");
 606     _last = task->prev();
 607   }
 608   --_size;
 609   ++_total_removed;
 610 }
 611 
 612 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
 613   assert(_lock->owned_by_self(), "must own lock");
 614   remove(task);
 615 
 616   // Enqueue the task for reclamation (should be done outside MCQ lock)
 617   task->set_next(_first_stale);
 618   task->set_prev(nullptr);
 619   _first_stale = task;
 620 }
 621 
 622 // methods in the compile queue need to be marked as used on the stack
 623 // so that they don't get reclaimed by Redefine Classes
 624 void CompileQueue::mark_on_stack() {
 625   for (CompileTask* task = _first; task != nullptr; task = task->next()) {
 626     task->mark_on_stack();
 627   }
 628   for (CompileTask* task = _queue.first(); !_queue.is_end(task); task = task->next()) {
 629     assert(task != nullptr, "");
 630     task->mark_on_stack();

 631   }
 632 }
 633 
 634 
 635 CompileQueue* CompileBroker::compile_queue(int comp_level, bool is_scc) {
 636   if (is_c2_compile(comp_level)) return ((is_scc  && (_sc_count > 0)) ? _sc2_compile_queue : _c2_compile_queue);
 637   if (is_c1_compile(comp_level)) return ((is_scc && (_sc_count > 0)) ? _sc1_compile_queue : _c1_compile_queue);
 638   return nullptr;
 639 }
 640 
 641 CompileQueue* CompileBroker::c1_compile_queue() {
 642   return _c1_compile_queue;
 643 }
 644 
 645 CompileQueue* CompileBroker::c2_compile_queue() {
 646   return _c2_compile_queue;
 647 }
 648 
 649 void CompileBroker::print_compile_queues(outputStream* st) {
 650   st->print_cr("Current compiles: ");
 651 
 652   char buf[2000];
 653   int buflen = sizeof(buf);
 654   Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
 655 
 656   st->cr();
 657   if (_c1_compile_queue != nullptr) {
 658     _c1_compile_queue->print(st);
 659   }
 660   if (_c2_compile_queue != nullptr) {
 661     _c2_compile_queue->print(st);
 662   }
 663   if (_c3_compile_queue != nullptr) {
 664     _c3_compile_queue->print(st);
 665   }
 666   if (_sc1_compile_queue != nullptr) {
 667     _sc1_compile_queue->print(st);
 668   }
 669   if (_sc2_compile_queue != nullptr) {
 670     _sc2_compile_queue->print(st);
 671   }
 672 }
 673 
 674 void CompileQueue::print(outputStream* st) {
 675   assert_locked_or_safepoint(_lock);
 676   st->print_cr("%s:", name());
 677   CompileTask* task = _first;
 678   if (task == nullptr) {
 679     st->print_cr("Empty");
 680   } else {
 681     while (task != nullptr) {
 682       task->print(st, nullptr, true, true);
 683       task = task->next();
 684     }
 685   }
 686   st->cr();
 687 }
 688 
 689 void CompileQueue::print_tty() {
 690   stringStream ss;
 691   // Dump the compile queue into a buffer before locking the tty
 692   print(&ss);
 693   {
 694     ttyLocker ttyl;
 695     tty->print("%s", ss.freeze());

 722       CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
 723     }
 724     first_registration = false;
 725 #endif // COMPILER2
 726   }
 727 }
 728 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
 729 
 730 // ------------------------------------------------------------------
 731 // CompileBroker::compilation_init
 732 //
 733 // Initialize the Compilation object
 734 void CompileBroker::compilation_init(JavaThread* THREAD) {
 735   // No need to initialize compilation system if we do not use it.
 736   if (!UseCompiler) {
 737     return;
 738   }
 739   // Set the interface to the current compiler(s).
 740   _c1_count = CompilationPolicy::c1_count();
 741   _c2_count = CompilationPolicy::c2_count();
 742   _c3_count = CompilationPolicy::c3_count();
 743   _sc_count = CompilationPolicy::sc_count();
 744 
 745 #if INCLUDE_JVMCI
 746   if (EnableJVMCI) {
 747     // This is creating a JVMCICompiler singleton.
 748     JVMCICompiler* jvmci = new JVMCICompiler();
 749 
 750     if (UseJVMCICompiler) {
 751       _compilers[1] = jvmci;
 752       if (FLAG_IS_DEFAULT(JVMCIThreads)) {
 753         if (BootstrapJVMCI) {
 754           // JVMCI will bootstrap so give it more threads
 755           _c2_count = MIN2(32, os::active_processor_count());
 756         }
 757       } else {
 758         _c2_count = JVMCIThreads;
 759       }
 760       if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
 761       } else {
 762 #ifdef COMPILER1
 763         _c1_count = JVMCIHostThreads;
 764 #endif // COMPILER1
 765       }
 766 #ifdef COMPILER2
 767       if (SCCache::is_on() && (_c3_count > 0)) {
 768         _compilers[2] = new C2Compiler();
 769       }
 770 #endif
 771     }
 772   }
 773 #endif // INCLUDE_JVMCI
 774 
 775 #ifdef COMPILER1
 776   if (_c1_count > 0) {
 777     _compilers[0] = new Compiler();
 778   }
 779 #endif // COMPILER1
 780 
 781 #ifdef COMPILER2
 782   if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
 783     if (_c2_count > 0) {
 784       _compilers[1] = new C2Compiler();
 785       // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit.
 786       // idToPhase mapping for c2 is in opto/phasetype.hpp
 787       JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)
 788     }
 789   }
 790 #endif // COMPILER2

 885     _perf_last_compile_size =
 886              PerfDataManager::create_variable(SUN_CI, "lastSize",
 887                                               PerfData::U_Bytes,
 888                                               (jlong)CompileBroker::no_compile,
 889                                               CHECK);
 890 
 891 
 892     _perf_last_failed_type =
 893              PerfDataManager::create_variable(SUN_CI, "lastFailedType",
 894                                               PerfData::U_None,
 895                                               (jlong)CompileBroker::no_compile,
 896                                               CHECK);
 897 
 898     _perf_last_invalidated_type =
 899          PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
 900                                           PerfData::U_None,
 901                                           (jlong)CompileBroker::no_compile,
 902                                           CHECK);
 903   }
 904 
 905   log_info(scc, init)("CompileBroker is initialized");
 906   _initialized = true;
 907 }
 908 
 909 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
 910   Handle thread_oop = JavaThread::create_system_thread_object(name, CHECK_NH);
 911   return thread_oop;
 912 }
 913 
 914 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
 915   CompilationPolicy::replay_training_at_init_loop(thread);
 916 }
 917 
 918 #if defined(ASSERT) && COMPILER2_OR_JVMCI
 919 // Entry for DeoptimizeObjectsALotThread. The threads are started in
 920 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
 921 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
 922     DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
 923     bool enter_single_loop;
 924     {
 925       MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
 926       static int single_thread_count = 0;
 927       enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
 928     }
 929     if (enter_single_loop) {
 930       dt->deoptimize_objects_alot_loop_single();
 931     } else {
 932       dt->deoptimize_objects_alot_loop_all();
 933     }
 934   }
 935 
 936 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
 937 // barrier targets a single thread which is selected round robin.

 975   if (java_lang_Thread::thread(thread_oop()) != nullptr) {
 976     assert(type == compiler_t, "should only happen with reused compiler threads");
 977     // The compiler thread hasn't actually exited yet so don't try to reuse it
 978     return nullptr;
 979   }
 980 
 981   JavaThread* new_thread = nullptr;
 982   switch (type) {
 983     case compiler_t:
 984       assert(comp != nullptr, "Compiler instance missing.");
 985       if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
 986         CompilerCounters* counters = new CompilerCounters();
 987         new_thread = new CompilerThread(queue, counters);
 988       }
 989       break;
 990 #if defined(ASSERT) && COMPILER2_OR_JVMCI
 991     case deoptimizer_t:
 992       new_thread = new DeoptimizeObjectsALotThread();
 993       break;
 994 #endif // ASSERT
 995     case training_replay_t:
 996       new_thread = new TrainingReplayThread();
 997       break;
 998     default:
 999       ShouldNotReachHere();
1000   }
1001 
1002   // At this point the new CompilerThread data-races with this startup
1003   // thread (which is the main thread and NOT the VM thread).
1004   // This means Java bytecodes being executed at startup can
1005   // queue compile jobs which will run at whatever default priority the
1006   // newly created CompilerThread runs at.
1007 
1008 
1009   // At this point it may be possible that no osthread was created for the
1010   // JavaThread due to lack of resources. We will handle that failure below.
1011   // Also check new_thread so that static analysis is happy.
1012   if (new_thread != nullptr && new_thread->osthread() != nullptr) {
1013 
1014     if (type == compiler_t) {
1015       CompilerThread::cast(new_thread)->set_compiler(comp);
1016     }
1017 

1057 }
1058 
1059 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
1060   char name_buffer[256];
1061   os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
1062   Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
1063   return JNIHandles::make_global(thread_oop);
1064 }
1065 
1066 static void print_compiler_threads(stringStream& msg) {
1067   if (TraceCompilerThreads) {
1068     tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
1069   }
1070   LogTarget(Debug, jit, thread) lt;
1071   if (lt.is_enabled()) {
1072     LogStream ls(lt);
1073     ls.print_cr("%s", msg.as_string());
1074   }
1075 }
1076 
1077 static void print_compiler_thread(JavaThread *ct) {
1078   if (trace_compiler_threads()) {
1079     ResourceMark rm;
1080     ThreadsListHandle tlh;  // name() depends on the TLH.
1081     assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1082     stringStream msg;
1083     msg.print("Added initial compiler thread %s", ct->name());
1084     print_compiler_threads(msg);
1085   }
1086 }
1087 
1088 void CompileBroker::init_compiler_threads() {
1089   // Ensure any exceptions lead to vm_exit_during_initialization.
1090   EXCEPTION_MARK;
1091 #if !defined(ZERO)
1092   assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
1093 #endif // !ZERO
1094   // Initialize the compilation queue
1095   if (_c2_count > 0) {
1096     const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
1097     _c2_compile_queue  = new CompileQueue(name, MethodCompileQueueC2_lock);
1098     _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
1099     _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
1100   }
1101   if (_c1_count > 0) {
1102     _c1_compile_queue  = new CompileQueue("C1 compile queue", MethodCompileQueueC1_lock);
1103     _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
1104     _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
1105   }
1106 
1107   if (_c3_count > 0) {
1108     const char* name = "C2 compile queue";
1109     _c3_compile_queue  = new CompileQueue(name, MethodCompileQueueC3_lock);
1110     _compiler3_objects = NEW_C_HEAP_ARRAY(jobject, _c3_count, mtCompiler);
1111     _compiler3_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c3_count, mtCompiler);
1112   }
1113   if (_sc_count > 0) {
1114     if (_c1_count > 0) { // C1 is present
1115       _sc1_compile_queue  = new CompileQueue("C1 SC compile queue", MethodCompileQueueSC1_lock);
1116     }
1117     if (_c2_count > 0) { // C2 is present
1118       _sc2_compile_queue  = new CompileQueue("C2 SC compile queue", MethodCompileQueueSC2_lock);
1119     }
1120     _sc_objects = NEW_C_HEAP_ARRAY(jobject, _sc_count, mtCompiler);
1121     _sc_logs = NEW_C_HEAP_ARRAY(CompileLog*, _sc_count, mtCompiler);
1122   }
1123   char name_buffer[256];
1124 
1125   for (int i = 0; i < _c2_count; i++) {
1126     // Create a name for our thread.
1127     jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
1128     _compiler2_objects[i] = thread_handle;
1129     _compiler2_logs[i] = nullptr;
1130 
1131     if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1132       JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
1133       assert(ct != nullptr, "should have been handled for initial thread");
1134       _compilers[1]->set_num_compiler_threads(i + 1);
1135       print_compiler_thread(ct);







1136     }
1137   }
1138 
1139   for (int i = 0; i < _c1_count; i++) {
1140     // Create a name for our thread.
1141     jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1142     _compiler1_objects[i] = thread_handle;
1143     _compiler1_logs[i] = nullptr;
1144 
1145     if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1146       JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1147       assert(ct != nullptr, "should have been handled for initial thread");
1148       _compilers[0]->set_num_compiler_threads(i + 1);
1149       print_compiler_thread(ct);
1150     }
1151   }
1152 
1153   for (int i = 0; i < _c3_count; i++) {
1154     // Create a name for our thread.
1155     os::snprintf_checked(name_buffer, sizeof(name_buffer), "C2 CompilerThread%d", i);
1156     Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1157     jobject thread_handle = JNIHandles::make_global(thread_oop);
1158     _compiler3_objects[i] = thread_handle;
1159     _compiler3_logs[i] = nullptr;
1160 
1161     JavaThread *ct = make_thread(compiler_t, thread_handle, _c3_compile_queue, _compilers[2], THREAD);
1162     assert(ct != nullptr, "should have been handled for initial thread");
1163     _compilers[2]->set_num_compiler_threads(i + 1);
1164     print_compiler_thread(ct);
1165   }
1166 
1167   if (_sc_count > 0) {
1168     int i = 0;
1169     if (_c1_count > 0) { // C1 is present
1170       os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d SC CompilerThread", 1);
1171       Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1172       jobject thread_handle = JNIHandles::make_global(thread_oop);
1173       _sc_objects[i] = thread_handle;
1174       _sc_logs[i] = nullptr;
1175       i++;
1176 
1177       JavaThread *ct = make_thread(compiler_t, thread_handle, _sc1_compile_queue, _compilers[0], THREAD);
1178       assert(ct != nullptr, "should have been handled for initial thread");
1179       print_compiler_thread(ct);
1180     }
1181     if (_c2_count > 0) { // C2 is present
1182       os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d SC CompilerThread", 2);
1183       Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1184       jobject thread_handle = JNIHandles::make_global(thread_oop);
1185       _sc_objects[i] = thread_handle;
1186       _sc_logs[i] = nullptr;
1187 
1188       JavaThread *ct = make_thread(compiler_t, thread_handle, _sc2_compile_queue, _compilers[1], THREAD);
1189       assert(ct != nullptr, "should have been handled for initial thread");
1190       print_compiler_thread(ct);
1191     }
1192   }
1193 
1194   if (UsePerfData) {
1195     PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count + _c3_count, CHECK);
1196   }
1197 
1198 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1199   if (DeoptimizeObjectsALot) {
1200     // Initialize and start the object deoptimizer threads
1201     const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1202     for (int count = 0; count < total_count; count++) {
1203       Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1204       jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1205       make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1206     }
1207   }
1208 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1209 }
1210 
1211 void CompileBroker::init_training_replay() {
1212   // Ensure any exceptions lead to vm_exit_during_initialization.
1213   EXCEPTION_MARK;
1214   if (TrainingData::have_data()) {
1215     Handle thread_oop = create_thread_oop("Training replay thread", CHECK);
1216     jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1217     make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1218   }
1219 }
1220 
1221 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1222 
1223   int old_c2_count = 0, new_c2_count = 0, old_c1_count = 0, new_c1_count = 0;
1224   const int c2_tasks_per_thread = 2, c1_tasks_per_thread = 4;
1225 
1226   // Quick check if we already have enough compiler threads without taking the lock.
1227   // Numbers may change concurrently, so we read them again after we have the lock.
1228   if (_c2_compile_queue != nullptr) {
1229     old_c2_count = get_c2_thread_count();
1230     new_c2_count = MIN2(_c2_count, _c2_compile_queue->size() / c2_tasks_per_thread);
1231   }
1232   if (_c1_compile_queue != nullptr) {
1233     old_c1_count = get_c1_thread_count();
1234     new_c1_count = MIN2(_c1_count, _c1_compile_queue->size() / c1_tasks_per_thread);
1235   }
1236   if (new_c2_count <= old_c2_count && new_c1_count <= old_c1_count) return;
1237 
1238   // Now, we do the more expensive operations.
1239   julong free_memory = os::free_memory();
1240   // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).

1323         stringStream msg;
1324         msg.print("Added compiler thread %s (free memory: %dMB, available profiled code cache: %dMB)",
1325                   ct->name(), (int)(free_memory/M), (int)(available_cc_p/M));
1326         print_compiler_threads(msg);
1327       }
1328     }
1329   }
1330 
1331   CompileThread_lock->unlock();
1332 }
1333 
1334 
1335 /**
1336  * Set the methods on the stack as on_stack so that redefine classes doesn't
1337  * reclaim them. This method is executed at a safepoint.
1338  */
1339 void CompileBroker::mark_on_stack() {
1340   assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1341   // Since we are at a safepoint, we do not need a lock to access
1342   // the compile queues.
1343   if (_c3_compile_queue != nullptr) {
1344     _c3_compile_queue->mark_on_stack();
1345   }
1346   if (_c2_compile_queue != nullptr) {
1347     _c2_compile_queue->mark_on_stack();
1348   }
1349   if (_c1_compile_queue != nullptr) {
1350     _c1_compile_queue->mark_on_stack();
1351   }
1352   if (_sc1_compile_queue != nullptr) {
1353     _sc1_compile_queue->mark_on_stack();
1354   }
1355   if (_sc2_compile_queue != nullptr) {
1356     _sc2_compile_queue->mark_on_stack();
1357   }
1358 }
1359 
1360 // ------------------------------------------------------------------
1361 // CompileBroker::compile_method
1362 //
1363 // Request compilation of a method.
1364 void CompileBroker::compile_method_base(const methodHandle& method,
1365                                         int osr_bci,
1366                                         int comp_level,
1367                                         const methodHandle& hot_method,
1368                                         int hot_count,
1369                                         CompileTask::CompileReason compile_reason,
1370                                         bool requires_online_compilation,
1371                                         bool blocking,
1372                                         Thread* thread) {
1373   guarantee(!method->is_abstract(), "cannot compile abstract methods");
1374   assert(method->method_holder()->is_instance_klass(),
1375          "sanity check");
1376   assert(!method->method_holder()->is_not_initialized()   ||
1377          compile_reason == CompileTask::Reason_Preload    ||
1378          compile_reason == CompileTask::Reason_Precompile ||
1379          compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1380   assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1381 
1382   if (CIPrintRequests) {
1383     tty->print("request: ");
1384     method->print_short_name(tty);
1385     if (osr_bci != InvocationEntryBci) {
1386       tty->print(" osr_bci: %d", osr_bci);
1387     }
1388     tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1389     if (!hot_method.is_null()) {
1390       tty->print(" hot: ");
1391       if (hot_method() != method()) {
1392           hot_method->print_short_name(tty);
1393       } else {
1394         tty->print("yes");
1395       }
1396     }
1397     tty->cr();
1398   }
1399 
1400   // A request has been made for compilation.  Before we do any
1401   // real work, check to see if the method has been compiled
1402   // in the meantime with a definitive result.
1403   if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1404     return;
1405   }
1406 
1407 #ifndef PRODUCT
1408   if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1409     if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1410       // Positive OSROnlyBCI means only compile that bci.  Negative means don't compile that BCI.
1411       return;
1412     }
1413   }
1414 #endif
1415 
1416   // If this method is already in the compile queue, then
1417   // we do not block the current thread.
1418   if (compilation_is_in_queue(method)) {
1419     // We may want to decay our counter a bit here to prevent
1420     // multiple denied requests for compilation.  This is an
1421     // open compilation policy issue. Note: The other possibility,
1422     // in the case that this is a blocking compile request, is to have
1423     // all subsequent blocking requesters wait for completion of
1424     // ongoing compiles. Note that in this case we'll need a protocol
1425     // for freeing the associated compile tasks. [Or we could have
1426     // a single static monitor on which all these waiters sleep.]
1427     return;
1428   }
1429 
1430   // Tiered policy requires MethodCounters to exist before adding a method to
1431   // the queue. Create if we don't have them yet.
1432   if (compile_reason != CompileTask::Reason_Preload) {
1433     method->get_method_counters(thread);
1434   }
1435 
1436   SCCEntry* scc_entry = find_scc_entry(method, osr_bci, comp_level, compile_reason, requires_online_compilation);
1437   bool is_scc = (scc_entry != nullptr);
1438 
1439   // Outputs from the following MutexLocker block:
1440   CompileTask* task = nullptr;
1441   CompileQueue* queue;
1442 #if INCLUDE_JVMCI
1443   if (is_c2_compile(comp_level) && compiler2()->is_jvmci() && compiler3() != nullptr &&
1444       ((JVMCICompiler*)compiler2())->force_comp_at_level_simple(method)) {
1445     assert(_c3_compile_queue != nullptr, "sanity");
1446     queue = _c3_compile_queue; // JVMCI compiler's methods compilation
1447   } else
1448 #endif
1449   queue = compile_queue(comp_level, is_scc);
1450 
1451   // Acquire our lock.
1452   {
1453     ConditionalMutexLocker locker(thread, queue->lock(), !UseLockFreeCompileQueues);
1454 
1455     // Make sure the method has not slipped into the queues since
1456     // last we checked; note that those checks were "fast bail-outs".
1457     // Here we need to be more careful, see 14012000 below.
1458     if (compilation_is_in_queue(method)) {
1459       return;
1460     }
1461 
1462     // We need to check again to see if the compilation has
1463     // completed.  A previous compilation may have registered
1464     // some result.
1465     if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1466       return;
1467     }
1468 
1469     // We now know that this compilation is not pending, complete,
1470     // or prohibited.  Assign a compile_id to this compilation
1471     // and check to see if it is in our [Start..Stop) range.
1472     int compile_id = assign_compile_id(method, osr_bci);
1473     if (compile_id == 0) {
1474       // The compilation falls outside the allowed range.
1475       return;
1476     }
1477 
1478 #if INCLUDE_JVMCI
1479     if (UseJVMCICompiler && blocking) {
1480       // Don't allow blocking compiles for requests triggered by JVMCI.
1481       if (thread->is_Compiler_thread()) {
1482         blocking = false;
1483       }
1484 
1485       // In libjvmci, JVMCI initialization should not deadlock with other threads

1535     // <RESULT, QUEUE> :
1536     //     <0, 1> : in compile queue, but not yet compiled
1537     //     <1, 1> : compiled but queue bit not cleared
1538     //     <1, 0> : compiled and queue bit cleared
1539     // Because we first check the queue bits then check the result bits,
1540     // we are assured that we cannot introduce a duplicate task.
1541     // Note that if we did the tests in the reverse order (i.e. check
1542     // result then check queued bit), we could get the result bit before
1543     // the compilation completed, and the queue bit after the compilation
1544     // completed, and end up introducing a "duplicate" (redundant) task.
1545     // In that case, the compiler thread should first check if a method
1546     // has already been compiled before trying to compile it.
1547     // NOTE: in the event that there are multiple compiler threads and
1548     // there is de-optimization/recompilation, things will get hairy,
1549     // and in that case it's best to protect both the testing (here) of
1550     // these bits, and their updating (here and elsewhere) under a
1551     // common lock.
1552     task = create_compile_task(queue,
1553                                compile_id, method,
1554                                osr_bci, comp_level,
1555                                hot_method, hot_count, scc_entry, compile_reason,
1556                                requires_online_compilation, blocking);
1557 
1558     if (task->is_scc() && (_sc_count > 0)) {
1559       // Put it on SC queue
1560       queue = is_c1_compile(comp_level) ? _sc1_compile_queue : _sc2_compile_queue;
1561     }
1562 
1563     if (UseLockFreeCompileQueues) {
1564       assert(queue->lock()->owned_by_self() == false, "");
1565       queue->add_pending(task);
1566     } else {
1567       queue->add(task);
1568     }
1569   }
1570 
1571   if (blocking) {
1572     wait_for_completion(task);
1573   }
1574 }
1575 
1576 SCCEntry* CompileBroker::find_scc_entry(const methodHandle& method, int osr_bci, int comp_level,
1577                                         CompileTask::CompileReason compile_reason,
1578                                         bool requires_online_compilation) {
1579   SCCEntry* scc_entry = nullptr;
1580   if (osr_bci == InvocationEntryBci && !requires_online_compilation && SCCache::is_on_for_read()) {
1581     // Check for cached code.
1582     if (compile_reason == CompileTask::Reason_Preload) {
1583       scc_entry = method->scc_entry();
1584       assert(scc_entry != nullptr && scc_entry->for_preload(), "sanity");
1585     } else {
1586       scc_entry = SCCache::find_code_entry(method, comp_level);
1587     }
1588   }
1589   return scc_entry;
1590 }
1591 
1592 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1593                                        int comp_level,
1594                                        const methodHandle& hot_method, int hot_count,
1595                                        bool requires_online_compilation,
1596                                        CompileTask::CompileReason compile_reason,
1597                                        TRAPS) {
1598   // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1599   if (!_initialized || comp_level == CompLevel_none) {
1600     return nullptr;
1601   }
1602 
1603 #if INCLUDE_JVMCI
1604   if (EnableJVMCI && UseJVMCICompiler &&
1605       comp_level == CompLevel_full_optimization && !AOTLinkedClassBulkLoader::class_preloading_finished()) {
1606     return nullptr;
1607   }
1608 #endif
1609 
1610   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1611   assert(comp != nullptr, "Ensure we have a compiler");
1612 
1613 #if INCLUDE_JVMCI
1614   if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1615     // JVMCI compilation is not yet initializable.
1616     return nullptr;
1617   }
1618 #endif
1619 
1620   DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1621   // CompileBroker::compile_method can trap and can have pending async exception.
1622   nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, requires_online_compilation, compile_reason, directive, THREAD);
1623   DirectivesStack::release(directive);
1624   return nm;
1625 }
1626 
1627 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1628                                          int comp_level,
1629                                          const methodHandle& hot_method, int hot_count,
1630                                          bool requires_online_compilation,
1631                                          CompileTask::CompileReason compile_reason,
1632                                          DirectiveSet* directive,
1633                                          TRAPS) {
1634 
1635   // make sure arguments make sense
1636   assert(method->method_holder()->is_instance_klass(), "not an instance method");
1637   assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1638   assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1639   assert(!method->method_holder()->is_not_initialized()   ||
1640          compile_reason == CompileTask::Reason_Preload    ||
1641          compile_reason == CompileTask::Reason_Precompile ||
1642          compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1643   // return quickly if possible
1644 
1645   if (PrecompileOnlyAndExit && !CompileTask::reason_is_precompiled(compile_reason)) {
1646     return nullptr;
1647   }
1648 
1649   // lock, make sure that the compilation
1650   // isn't prohibited in a straightforward way.
1651   AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1652   if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1653     return nullptr;
1654   }
1655 
1656   if (osr_bci == InvocationEntryBci) {
1657     // standard compilation
1658     nmethod* method_code = method->code();
1659     if (method_code != nullptr) {
1660       if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1661         return method_code;
1662       }
1663     }
1664     if (method->is_not_compilable(comp_level)) {
1665       return nullptr;
1666     }
1667   } else {
1668     // osr compilation
1669     // We accept a higher level osr method
1670     nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1671     if (nm != nullptr) return nm;
1672     if (method->is_not_osr_compilable(comp_level)) return nullptr;
1673   }
1674 
1675   assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1676   // some prerequisites that are compiler specific
1677   if (compile_reason != CompileTask::Reason_Preload && (comp->is_c2() || comp->is_jvmci())) {
1678     InternalOOMEMark iom(THREAD);
1679     method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1680     // Resolve all classes seen in the signature of the method
1681     // we are compiling.
1682     Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1683   }
1684 
1685   // If the method is native, do the lookup in the thread requesting
1686   // the compilation. Native lookups can load code, which is not
1687   // permitted during compilation.
1688   //
1689   // Note: A native method implies non-osr compilation which is
1690   //       checked with an assertion at the entry of this method.
1691   if (method->is_native() && !method->is_method_handle_intrinsic()) {
1692     address adr = NativeLookup::lookup(method, THREAD);
1693     if (HAS_PENDING_EXCEPTION) {
1694       // In case of an exception looking up the method, we just forget
1695       // about it. The interpreter will kick-in and throw the exception.
1696       method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1697       CLEAR_PENDING_EXCEPTION;

1736             method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1737         return nullptr;
1738       }
1739 #endif // IA32 && !ZERO
1740 
1741       // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1742       // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1743       //
1744       // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1745       // in this case.  If we can't generate one and use it we can not execute the out-of-line method handle calls.
1746       AdapterHandlerLibrary::create_native_wrapper(method);
1747     } else {
1748       return nullptr;
1749     }
1750   } else {
1751     // If the compiler is shut off due to code cache getting full
1752     // fail out now so blocking compiles dont hang the java thread
1753     if (!should_compile_new_jobs()) {
1754       return nullptr;
1755     }
1756     bool is_blocking = ReplayCompiles                                             ||
1757                        !directive->BackgroundCompilationOption                    ||
1758                        (PreloadBlocking && (compile_reason == CompileTask::Reason_Preload)) ||
1759                        (compile_reason == CompileTask::Reason_Precompile)         ||
1760                        (compile_reason == CompileTask::Reason_PrecompileForPreload);
1761     compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, requires_online_compilation, is_blocking, THREAD);
1762   }
1763 
1764   // return requested nmethod
1765   // We accept a higher level osr method
1766   if (osr_bci == InvocationEntryBci) {
1767     return method->code();
1768   }
1769   return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1770 }
1771 
1772 
1773 // ------------------------------------------------------------------
1774 // CompileBroker::compilation_is_complete
1775 //
1776 // See if compilation of this method is already complete.
1777 bool CompileBroker::compilation_is_complete(Method*                    method,
1778                                             int                        osr_bci,
1779                                             int                        comp_level,
1780                                             bool                       online_only,
1781                                             CompileTask::CompileReason compile_reason) {
1782   if (compile_reason == CompileTask::Reason_Precompile ||
1783       compile_reason == CompileTask::Reason_PrecompileForPreload) {
1784     return false; // FIXME: any restrictions?
1785   }
1786   bool is_osr = (osr_bci != standard_entry_bci);
1787   if (is_osr) {
1788     if (method->is_not_osr_compilable(comp_level)) {
1789       return true;
1790     } else {
1791       nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1792       return (result != nullptr);
1793     }
1794   } else {
1795     if (method->is_not_compilable(comp_level)) {
1796       return true;
1797     } else {
1798       nmethod* result = method->code();
1799       if (result == nullptr) {
1800         return false;
1801       }
1802       if (online_only && result->is_scc()) {
1803         return false;
1804       }
1805       bool same_level = (comp_level == result->comp_level());
1806       if (result->has_clinit_barriers()) {
1807         return !same_level; // Allow replace preloaded code with new code of the same level
1808       }
1809       return same_level;
1810     }
1811   }
1812 }
1813 
1814 
1815 /**
1816  * See if this compilation is already requested.
1817  *
1818  * Implementation note: there is only a single "is in queue" bit
1819  * for each method.  This means that the check below is overly
1820  * conservative in the sense that an osr compilation in the queue
1821  * will block a normal compilation from entering the queue (and vice
1822  * versa).  This can be remedied by a full queue search to disambiguate
1823  * cases.  If it is deemed profitable, this may be done.
1824  */
1825 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1826   return method->queued_for_compilation();
1827 }
1828 
1829 // ------------------------------------------------------------------

1889     if (CIStart <= id && id < CIStop) {
1890       return id;
1891     }
1892   }
1893 
1894   // Method was not in the appropriate compilation range.
1895   method->set_not_compilable_quietly("Not in requested compile id range");
1896   return 0;
1897 #else
1898   // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1899   // only _compilation_id is incremented.
1900   return Atomic::add(&_compilation_id, 1);
1901 #endif
1902 }
1903 
1904 // ------------------------------------------------------------------
1905 // CompileBroker::assign_compile_id_unlocked
1906 //
1907 // Public wrapper for assign_compile_id that acquires the needed locks
1908 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {

1909   return assign_compile_id(method, osr_bci);
1910 }
1911 
1912 // ------------------------------------------------------------------
1913 // CompileBroker::create_compile_task
1914 //
1915 // Create a CompileTask object representing the current request for
1916 // compilation.  Add this task to the queue.
1917 CompileTask* CompileBroker::create_compile_task(CompileQueue*       queue,
1918                                                 int                 compile_id,
1919                                                 const methodHandle& method,
1920                                                 int                 osr_bci,
1921                                                 int                 comp_level,
1922                                                 const methodHandle& hot_method,
1923                                                 int                 hot_count,
1924                                                 SCCEntry*           scc_entry,
1925                                                 CompileTask::CompileReason compile_reason,
1926                                                 bool                requires_online_compilation,
1927                                                 bool                blocking) {
1928   CompileTask* new_task = CompileTask::allocate();
1929   new_task->initialize(compile_id, method, osr_bci, comp_level,
1930                        hot_method, hot_count, scc_entry, compile_reason, queue,
1931                        requires_online_compilation, blocking);

1932   return new_task;
1933 }
1934 
1935 #if INCLUDE_JVMCI
1936 // The number of milliseconds to wait before checking if
1937 // JVMCI compilation has made progress.
1938 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1939 
1940 // The number of JVMCI compilation progress checks that must fail
1941 // before unblocking a thread waiting for a blocking compilation.
1942 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1943 
1944 /**
1945  * Waits for a JVMCI compiler to complete a given task. This thread
1946  * waits until either the task completes or it sees no JVMCI compilation
1947  * progress for N consecutive milliseconds where N is
1948  * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1949  * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1950  *
1951  * @return true if this thread needs to free/recycle the task

2053  * compiler threads can start compiling.
2054  */
2055 bool CompileBroker::init_compiler_runtime() {
2056   CompilerThread* thread = CompilerThread::current();
2057   AbstractCompiler* comp = thread->compiler();
2058   // Final sanity check - the compiler object must exist
2059   guarantee(comp != nullptr, "Compiler object must exist");
2060 
2061   {
2062     // Must switch to native to allocate ci_env
2063     ThreadToNativeFromVM ttn(thread);
2064     ciEnv ci_env((CompileTask*)nullptr);
2065     // Cache Jvmti state
2066     ci_env.cache_jvmti_state();
2067     // Cache DTrace flags
2068     ci_env.cache_dtrace_flags();
2069 
2070     // Switch back to VM state to do compiler initialization
2071     ThreadInVMfromNative tv(thread);
2072 

2073     comp->initialize();
2074   }
2075 
2076   if (comp->is_failed()) {
2077     disable_compilation_forever();
2078     // If compiler initialization failed, no compiler thread that is specific to a
2079     // particular compiler runtime will ever start to compile methods.
2080     shutdown_compiler_runtime(comp, thread);
2081     return false;
2082   }
2083 
2084   // C1 specific check
2085   if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
2086     warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
2087     return false;
2088   }
2089 
2090   return true;
2091 }
2092 
2093 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
2094   BufferBlob* blob = thread->get_buffer_blob();
2095   if (blob != nullptr) {
2096     blob->purge();
2097     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2098     CodeCache::free(blob);
2099   }
2100 }
2101 
2102 /**
2103  * If C1 and/or C2 initialization failed, we shut down all compilation.
2104  * We do this to keep things simple. This can be changed if it ever turns
2105  * out to be a problem.
2106  */
2107 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
2108   free_buffer_blob_if_allocated(thread);
2109 
2110   log_info(compilation)("shutdown_compiler_runtime: " INTPTR_FORMAT, p2i(thread));
2111 
2112   if (comp->should_perform_shutdown()) {
2113     // There are two reasons for shutting down the compiler
2114     // 1) compiler runtime initialization failed
2115     // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
2116     warning("%s initialization failed. Shutting down all compilers", comp->name());
2117 
2118     // Only one thread per compiler runtime object enters here
2119     // Set state to shut down
2120     comp->set_shut_down();
2121 
2122     // Delete all queued compilation tasks to make compiler threads exit faster.
2123     if (_c1_compile_queue != nullptr) {
2124       _c1_compile_queue->free_all();
2125     }
2126 
2127     if (_c2_compile_queue != nullptr) {
2128       _c2_compile_queue->free_all();
2129     }
2130 
2131     if (_c3_compile_queue != nullptr) {
2132       _c3_compile_queue->free_all();
2133     }
2134 
2135     // Set flags so that we continue execution with using interpreter only.
2136     UseCompiler    = false;
2137     UseInterpreter = true;
2138 
2139     // We could delete compiler runtimes also. However, there are references to
2140     // the compiler runtime(s) (e.g.,  nmethod::is_compiled_by_c1()) which then
2141     // fail. This can be done later if necessary.
2142   }
2143 }
2144 
2145 /**
2146  * Helper function to create new or reuse old CompileLog.
2147  */
2148 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
2149   if (!LogCompilation) return nullptr;
2150 
2151   AbstractCompiler *compiler = ct->compiler();
2152   bool jvmci = JVMCI_ONLY( compiler->is_jvmci() ||) false;
2153   bool c1 = compiler->is_c1();
2154   jobject* compiler_objects = c1 ? _compiler1_objects : (_c3_count == 0 ? _compiler2_objects : (jvmci ? _compiler2_objects : _compiler3_objects));
2155   assert(compiler_objects != nullptr, "must be initialized at this point");
2156   CompileLog** logs = c1 ? _compiler1_logs : (_c3_count == 0 ? _compiler2_logs : (jvmci ? _compiler2_logs : _compiler3_logs));
2157   assert(logs != nullptr, "must be initialized at this point");
2158   int count = c1 ? _c1_count : (_c3_count == 0 ? _c2_count : (jvmci ? _c2_count : _c3_count));
2159 
2160   if (ct->queue() == _sc1_compile_queue || ct->queue() == _sc2_compile_queue) {
2161     compiler_objects = _sc_objects;
2162     logs  = _sc_logs;
2163     count = _sc_count;
2164   }
2165   // Find Compiler number by its threadObj.
2166   oop compiler_obj = ct->threadObj();
2167   int compiler_number = 0;
2168   bool found = false;
2169   for (; compiler_number < count; compiler_number++) {
2170     if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
2171       found = true;
2172       break;
2173     }
2174   }
2175   assert(found, "Compiler must exist at this point");
2176 
2177   // Determine pointer for this thread's log.
2178   CompileLog** log_ptr = &logs[compiler_number];
2179 
2180   // Return old one if it exists.
2181   CompileLog* log = *log_ptr;
2182   if (log != nullptr) {
2183     ct->init_log(log);
2184     return log;

2222     log->stamp();
2223     log->end_elem();
2224   }
2225 
2226   // If compiler thread/runtime initialization fails, exit the compiler thread
2227   if (!init_compiler_runtime()) {
2228     return;
2229   }
2230 
2231   thread->start_idle_timer();
2232 
2233   // Poll for new compilation tasks as long as the JVM runs. Compilation
2234   // should only be disabled if something went wrong while initializing the
2235   // compiler runtimes. This, in turn, should not happen. The only known case
2236   // when compiler runtime initialization fails is if there is not enough free
2237   // space in the code cache to generate the necessary stubs, etc.
2238   while (!is_compilation_disabled_forever()) {
2239     // We need this HandleMark to avoid leaking VM handles.
2240     HandleMark hm(thread);
2241 
2242     RecompilationPolicy::recompilation_step(RecompilationWorkUnitSize, thread);
2243 
2244     CompileTask* task = queue->get(thread);
2245 
2246     if (task == nullptr) {
2247       if (UseDynamicNumberOfCompilerThreads) {
2248         // Access compiler_count under lock to enforce consistency.
2249         MutexLocker only_one(CompileThread_lock);
2250         if (can_remove(thread, true)) {
2251           if (trace_compiler_threads()) {
2252             ResourceMark rm;
2253             stringStream msg;
2254             msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
2255                       thread->name(), thread->idle_time_millis());
2256             print_compiler_threads(msg);
2257           }
2258 
2259           // Notify compiler that the compiler thread is about to stop
2260           thread->compiler()->stopping_compiler_thread(thread);
2261 
2262           free_buffer_blob_if_allocated(thread);
2263           return; // Stop this thread.
2264         }
2265       }
2266     } else {
2267       // Assign the task to the current thread.  Mark this compilation
2268       // thread as active for the profiler.
2269       // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
2270       // occurs after fetching the compile task off the queue.
2271       CompileTaskWrapper ctw(task);
2272       methodHandle method(thread, task->method());
2273 
2274       // Never compile a method if breakpoints are present in it
2275       if (method()->number_of_breakpoints() == 0) {
2276         // Compile the method.
2277         if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
2278           invoke_compiler_on_method(task);
2279           thread->start_idle_timer();
2280         } else {
2281           // After compilation is disabled, remove remaining methods from queue
2282           method->clear_queued_for_compilation();
2283           method->set_pending_queue_processed(false);
2284           task->set_failure_reason("compilation is disabled");
2285         }
2286       } else {
2287         task->set_failure_reason("breakpoints are present");
2288       }
2289 
2290       if (UseDynamicNumberOfCompilerThreads) {
2291         possibly_add_compiler_threads(thread);
2292         assert(!thread->has_pending_exception(), "should have been handled");
2293       }
2294     }
2295   }
2296 
2297   // Shut down compiler runtime
2298   shutdown_compiler_runtime(thread->compiler(), thread);
2299 }
2300 
2301 // ------------------------------------------------------------------
2302 // CompileBroker::init_compiler_thread_log
2303 //

2466 
2467 // Acquires Compilation_lock and waits for it to be notified
2468 // as long as WhiteBox::compilation_locked is true.
2469 static void whitebox_lock_compilation() {
2470   MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2471   while (WhiteBox::compilation_locked) {
2472     locker.wait();
2473   }
2474 }
2475 
2476 // ------------------------------------------------------------------
2477 // CompileBroker::invoke_compiler_on_method
2478 //
2479 // Compile a method.
2480 //
2481 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2482   task->print_ul();
2483   elapsedTimer time;
2484 
2485   DirectiveSet* directive = task->directive();




2486 
2487   CompilerThread* thread = CompilerThread::current();
2488   ResourceMark rm(thread);
2489 
2490   if (CompilationLog::log() != nullptr) {
2491     CompilationLog::log()->log_compile(thread, task);
2492   }
2493 
2494   // Common flags.
2495   int compile_id = task->compile_id();
2496   int osr_bci = task->osr_bci();
2497   bool is_osr = (osr_bci != standard_entry_bci);
2498   bool should_log = (thread->log() != nullptr);
2499   bool should_break = false;
2500   bool should_print_compilation = PrintCompilation || directive->PrintCompilationOption;
2501   const int task_level = task->comp_level();
2502   AbstractCompiler* comp = task->compiler();
2503   {
2504     // create the handle inside it's own block so it can't
2505     // accidentally be referenced once the thread transitions to
2506     // native.  The NoHandleMark before the transition should catch
2507     // any cases where this occurs in the future.
2508     methodHandle method(thread, task->method());
2509 
2510     assert(!method->is_native(), "no longer compile natives");
2511 
2512     // Update compile information when using perfdata.
2513     if (UsePerfData) {
2514       update_compile_perf_data(thread, method, is_osr);
2515     }
2516 
2517     DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2518   }
2519 
2520   should_break = directive->BreakAtCompileOption || task->check_break_at_flags();

2606     }
2607     assert(thread->env() == &ci_env, "set by ci_env");
2608     // The thread-env() field is cleared in ~CompileTaskWrapper.
2609 
2610     // Cache Jvmti state
2611     bool method_is_old = ci_env.cache_jvmti_state();
2612 
2613     // Skip redefined methods
2614     if (method_is_old) {
2615       ci_env.record_method_not_compilable("redefined method", true);
2616     }
2617 
2618     // Cache DTrace flags
2619     ci_env.cache_dtrace_flags();
2620 
2621     ciMethod* target = ci_env.get_method_from_handle(target_handle);
2622 
2623     TraceTime t1("compilation", &time);
2624     EventCompilation event;
2625 
2626     bool install_code = true;
2627     if (comp == nullptr) {
2628       ci_env.record_method_not_compilable("no compiler");
2629     } else if (!ci_env.failing()) {
2630       if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2631         whitebox_lock_compilation();
2632       }
2633       if (StoreCachedCode && task->is_precompiled()) {
2634         install_code = false; // not suitable in the current context
2635       }
2636       comp->compile_method(&ci_env, target, osr_bci, install_code, directive);
2637 
2638       /* Repeat compilation without installing code for profiling purposes */
2639       int repeat_compilation_count = directive->RepeatCompilationOption;
2640       while (repeat_compilation_count > 0) {
2641         ResourceMark rm(thread);
2642         task->print_ul("NO CODE INSTALLED");
2643         comp->compile_method(&ci_env, target, osr_bci, false, directive);
2644         repeat_compilation_count--;
2645       }
2646     }
2647 
2648     DirectivesStack::release(directive);
2649 
2650     if (!ci_env.failing() && !task->is_success() && install_code) {
2651       assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2652       assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2653       // The compiler elected, without comment, not to register a result.
2654       // Do not attempt further compilations of this method.
2655       ci_env.record_method_not_compilable("compile failed");
2656     }
2657 
2658     // Copy this bit to the enclosing block:
2659     compilable = ci_env.compilable();
2660 
2661     if (ci_env.failing()) {
2662       // Duplicate the failure reason string, so that it outlives ciEnv
2663       failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2664       failure_reason_on_C_heap = true;
2665       retry_message = ci_env.retry_message();
2666       ci_env.report_failure(failure_reason);
2667     }
2668 
2669     if (ci_env.failing()) {
2670       handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2671     }
2672     if (event.should_commit()) {
2673       post_compilation_event(event, task);
2674     }
2675   }
2676 
2677   if (failure_reason != nullptr) {
2678     task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2679     if (CompilationLog::log() != nullptr) {
2680       CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2681     }
2682     if (PrintCompilation) {
2683       FormatBufferResource msg = retry_message != nullptr ?
2684         FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2685         FormatBufferResource("COMPILE SKIPPED: %s",      failure_reason);
2686       task->print(tty, msg);
2687     }
2688   }
2689 
2690   task->mark_finished(os::elapsed_counter());
2691 
2692   methodHandle method(thread, task->method());
2693 
2694   DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2695 
2696   collect_statistics(thread, time, task);
2697 
2698   if (PrintCompilation && PrintCompilation2) {
2699     tty->print("%7d ", (int) tty->time_stamp().milliseconds());  // print timestamp
2700     tty->print("%4d ", compile_id);    // print compilation number
2701     tty->print("%s ", (is_osr ? "%" : (task->is_scc() ? "A" : " ")));
2702     if (task->is_success()) {
2703       tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2704     }
2705     tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2706   }
2707 
2708   Log(compilation, codecache) log;
2709   if (log.is_debug()) {
2710     LogStream ls(log.debug());
2711     codecache_print(&ls, /* detailed= */ false);
2712   }
2713   if (PrintCodeCacheOnCompilation) {
2714     codecache_print(/* detailed= */ false);
2715   }
2716   // Disable compilation, if required.
2717   switch (compilable) {
2718   case ciEnv::MethodCompilable_never:
2719     if (is_osr)
2720       method->set_not_osr_compilable_quietly("MethodCompilable_never");
2721     else
2722       method->set_not_compilable_quietly("MethodCompilable_never");
2723     break;
2724   case ciEnv::MethodCompilable_not_at_tier:
2725     if (is_osr)
2726       method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2727     else
2728       method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2729     break;
2730   }
2731 
2732   // Note that the queued_for_compilation bits are cleared without
2733   // protection of a mutex. [They were set by the requester thread,
2734   // when adding the task to the compile queue -- at which time the
2735   // compile queue lock was held. Subsequently, we acquired the compile
2736   // queue lock to get this task off the compile queue; thus (to belabour
2737   // the point somewhat) our clearing of the bits must be occurring
2738   // only after the setting of the bits. See also 14012000 above.
2739   method->clear_queued_for_compilation();
2740   method->set_pending_queue_processed(false);
2741 
2742   if (should_print_compilation) {
2743     ResourceMark rm;
2744     task->print_tty();
2745   }
2746 }
2747 
2748 /**
2749  * The CodeCache is full. Print warning and disable compilation.
2750  * Schedule code cache cleaning so compilation can continue later.
2751  * This function needs to be called only from CodeCache::allocate(),
2752  * since we currently handle a full code cache uniformly.
2753  */
2754 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2755   UseInterpreter = true;
2756   if (UseCompiler || AlwaysCompileLoopMethods ) {
2757     if (xtty != nullptr) {
2758       stringStream s;
2759       // Dump code cache state into a buffer before locking the tty,
2760       // because log_state() will use locks causing lock conflicts.
2761       CodeCache::log_state(&s);
2762       // Lock to prevent tearing
2763       ttyLocker ttyl;
2764       xtty->begin_elem("code_cache_full");
2765       xtty->print("%s", s.freeze());

2838 // CompileBroker::collect_statistics
2839 //
2840 // Collect statistics about the compilation.
2841 
2842 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2843   bool success = task->is_success();
2844   methodHandle method (thread, task->method());
2845   int compile_id = task->compile_id();
2846   bool is_osr = (task->osr_bci() != standard_entry_bci);
2847   const int comp_level = task->comp_level();
2848   CompilerCounters* counters = thread->counters();
2849 
2850   MutexLocker locker(CompileStatistics_lock);
2851 
2852   // _perf variables are production performance counters which are
2853   // updated regardless of the setting of the CITime and CITimeEach flags
2854   //
2855 
2856   // account all time, including bailouts and failures in this counter;
2857   // C1 and C2 counters are counting both successful and unsuccessful compiles
2858   _t_total_compilation.add(&time);
2859 
2860   // Update compilation times. Used by the implementation of JFR CompilerStatistics
2861   // and java.lang.management.CompilationMXBean.
2862   _perf_total_compilation->inc(time.ticks());
2863   _peak_compilation_time = MAX2(time.milliseconds(), _peak_compilation_time);
2864 
2865   if (!success) {
2866     _total_bailout_count++;
2867     if (UsePerfData) {
2868       _perf_last_failed_method->set_value(counters->current_method());
2869       _perf_last_failed_type->set_value(counters->compile_type());
2870       _perf_total_bailout_count->inc();
2871     }
2872     _t_bailedout_compilation.add(&time);
2873 
2874     if (CITime || log_is_enabled(Info, init)) {
2875       CompilerStatistics* stats = nullptr;
2876       if (task->is_scc()) {
2877         int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2878         stats = &_scc_stats_per_level[level];
2879       } else {
2880         stats = &_stats_per_level[comp_level-1];
2881       }
2882       stats->_bailout.update(time, 0);
2883     }
2884   } else if (!task->is_success()) {
2885     if (UsePerfData) {
2886       _perf_last_invalidated_method->set_value(counters->current_method());
2887       _perf_last_invalidated_type->set_value(counters->compile_type());
2888       _perf_total_invalidated_count->inc();
2889     }
2890     _total_invalidated_count++;
2891     _t_invalidated_compilation.add(&time);
2892 
2893     if (CITime || log_is_enabled(Info, init)) {
2894       CompilerStatistics* stats = nullptr;
2895       if (task->is_scc()) {
2896         int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2897         stats = &_scc_stats_per_level[level];
2898       } else {
2899         stats = &_stats_per_level[comp_level-1];
2900       }
2901       stats->_invalidated.update(time, 0);
2902     }
2903   } else {
2904     // Compilation succeeded
2905     if (CITime || log_is_enabled(Info, init)) {
2906       int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2907       if (is_osr) {
2908         _t_osr_compilation.add(&time);
2909         _sum_osr_bytes_compiled += bytes_compiled;
2910       } else {
2911         _t_standard_compilation.add(&time);
2912         _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2913       }
2914 
2915       // Collect statistic per compilation level
2916       if (task->is_scc()) {
2917         _scc_stats._standard.update(time, bytes_compiled);
2918         _scc_stats._nmethods_size += task->nm_total_size();
2919         _scc_stats._nmethods_code_size += task->nm_insts_size();
2920         int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2921         CompilerStatistics* stats = &_scc_stats_per_level[level];
2922         stats->_standard.update(time, bytes_compiled);
2923         stats->_nmethods_size += task->nm_total_size();
2924         stats->_nmethods_code_size += task->nm_insts_size();
2925       } else if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2926         CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2927         if (is_osr) {
2928           stats->_osr.update(time, bytes_compiled);
2929         } else {
2930           stats->_standard.update(time, bytes_compiled);
2931         }
2932         stats->_nmethods_size += task->nm_total_size();
2933         stats->_nmethods_code_size += task->nm_insts_size();
2934       } else {
2935         assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2936       }
2937 
2938       // Collect statistic per compiler
2939       AbstractCompiler* comp = task->compiler();
2940       if (comp && !task->is_scc()) {
2941         CompilerStatistics* stats = comp->stats();
2942         if (is_osr) {
2943           stats->_osr.update(time, bytes_compiled);
2944         } else {
2945           stats->_standard.update(time, bytes_compiled);
2946         }
2947         stats->_nmethods_size += task->nm_total_size();
2948         stats->_nmethods_code_size += task->nm_insts_size();
2949       } else if (!task->is_scc()) { // if (!comp)
2950         assert(false, "Compiler object must exist");
2951       }
2952     }
2953 
2954     if (UsePerfData) {
2955       // save the name of the last method compiled
2956       _perf_last_method->set_value(counters->current_method());
2957       _perf_last_compile_type->set_value(counters->compile_type());
2958       _perf_last_compile_size->set_value(method->code_size() +
2959                                          task->num_inlined_bytecodes());
2960       if (is_osr) {
2961         _perf_osr_compilation->inc(time.ticks());
2962         _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2963       } else {
2964         _perf_standard_compilation->inc(time.ticks());
2965         _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2966       }
2967     }
2968 
2969     if (CITimeEach) {

2992       _total_standard_compile_count++;
2993     }
2994   }
2995   // set the current method for the thread to null
2996   if (UsePerfData) counters->set_current_method("");
2997 }
2998 
2999 const char* CompileBroker::compiler_name(int comp_level) {
3000   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
3001   if (comp == nullptr) {
3002     return "no compiler";
3003   } else {
3004     return (comp->name());
3005   }
3006 }
3007 
3008 jlong CompileBroker::total_compilation_ticks() {
3009   return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
3010 }
3011 
3012 void CompileBroker::log_not_entrant(nmethod* nm) {
3013   _total_not_entrant_count++;
3014   if (CITime || log_is_enabled(Info, init)) {
3015     CompilerStatistics* stats = nullptr;
3016     int level = nm->comp_level();
3017     if (nm->is_scc()) {
3018       if (nm->preloaded()) {
3019         assert(level == CompLevel_full_optimization, "%d", level);
3020         level = CompLevel_full_optimization + 1;
3021       }
3022       stats = &_scc_stats_per_level[level - 1];
3023     } else {
3024       stats = &_stats_per_level[level - 1];
3025     }
3026     stats->_made_not_entrant._count++;
3027   }
3028 }
3029 
3030 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
3031   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}",
3032                 name, stats->bytes_per_second(),
3033                 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
3034                 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
3035                 stats->_nmethods_size, stats->_nmethods_code_size);
3036 }
3037 
3038 static void print_helper(outputStream* st, const char* name, CompilerStatistics::Data data, bool print_time = true) {
3039   if (data._count > 0) {
3040     st->print("; %s: %4u methods", name, data._count);
3041     if (print_time) {
3042       st->print(" (in %.3fs)", data._time.seconds());
3043     }
3044   }
3045 }
3046 
3047 static void print_tier_helper(outputStream* st, const char* prefix, int tier, CompilerStatistics* stats) {
3048   st->print("    %s%d: %5u methods", prefix, tier, stats->_standard._count);
3049   if (stats->_standard._count > 0) {
3050     st->print(" (in %.3fs)", stats->_standard._time.seconds());
3051   }
3052   print_helper(st, "osr",     stats->_osr);
3053   print_helper(st, "bailout", stats->_bailout);
3054   print_helper(st, "invalid", stats->_invalidated);
3055   print_helper(st, "not_entrant", stats->_made_not_entrant, false);
3056   st->cr();
3057 }
3058 
3059 static void print_queue_info(outputStream* st, CompileQueue* queue) {
3060   if (queue != nullptr) {
3061     MutexLocker ml(queue->lock());
3062 
3063     uint  total_cnt = 0;
3064     uint active_cnt = 0;
3065     for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3066       guarantee(jt != nullptr, "");
3067       if (jt->is_Compiler_thread()) {
3068         CompilerThread* ct = (CompilerThread*)jt;
3069 
3070         guarantee(ct != nullptr, "");
3071         if (ct->queue() == queue) {
3072           ++total_cnt;
3073           CompileTask* task = ct->task();
3074           if (task != nullptr) {
3075             ++active_cnt;
3076           }
3077         }
3078       }
3079     }
3080 
3081     st->print("  %s (%d active / %d total threads): %u tasks",
3082               queue->name(), active_cnt, total_cnt, queue->size());
3083     if (queue->size() > 0) {
3084       uint counts[] = {0, 0, 0, 0, 0}; // T1 ... T5
3085       for (CompileTask* task = queue->first(); task != nullptr; task = task->next()) {
3086         int tier = task->comp_level();
3087         if (task->is_scc() && task->preload()) {
3088           assert(tier == CompLevel_full_optimization, "%d", tier);
3089           tier = CompLevel_full_optimization + 1;
3090         }
3091         counts[tier-1]++;
3092       }
3093       st->print(":");
3094       for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3095         uint cnt = counts[tier-1];
3096         if (cnt > 0) {
3097           st->print(" T%d: %u tasks;", tier, cnt);
3098         }
3099       }
3100     }
3101     st->cr();
3102 
3103 //    for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3104 //      guarantee(jt != nullptr, "");
3105 //      if (jt->is_Compiler_thread()) {
3106 //        CompilerThread* ct = (CompilerThread*)jt;
3107 //
3108 //        guarantee(ct != nullptr, "");
3109 //        if (ct->queue() == queue) {
3110 //          ResourceMark rm;
3111 //          CompileTask* task = ct->task();
3112 //          st->print("    %s: ", ct->name_raw());
3113 //          if (task != nullptr) {
3114 //            task->print(st, nullptr, true /*short_form*/, false /*cr*/);
3115 //          }
3116 //          st->cr();
3117 //        }
3118 //      }
3119 //    }
3120   }
3121 }
3122 void CompileBroker::print_statistics_on(outputStream* st) {
3123   st->print_cr("  Total: %u methods; %u bailouts, %u invalidated, %u non_entrant",
3124                _total_compile_count, _total_bailout_count, _total_invalidated_count, _total_not_entrant_count);
3125   for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3126     print_tier_helper(st, "Tier", tier, &_stats_per_level[tier-1]);
3127   }
3128   st->cr();
3129 
3130   if (LoadCachedCode || StoreCachedCode) {
3131     for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3132       if (tier != CompLevel_full_profile) {
3133         print_tier_helper(st, "SC T", tier, &_scc_stats_per_level[tier - 1]);
3134       }
3135     }
3136     st->cr();
3137   }
3138 
3139   print_queue_info(st, _c1_compile_queue);
3140   print_queue_info(st, _c2_compile_queue);
3141   print_queue_info(st, _c3_compile_queue);
3142   print_queue_info(st, _sc1_compile_queue);
3143   print_queue_info(st, _sc2_compile_queue);
3144 }
3145 
3146 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
3147   if (per_compiler) {
3148     if (aggregate) {
3149       tty->cr();
3150       tty->print_cr("[%dms] Individual compiler times (for compiled methods only)", (int)tty->time_stamp().milliseconds());
3151       tty->print_cr("------------------------------------------------");
3152       tty->cr();
3153     }
3154     for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
3155       AbstractCompiler* comp = _compilers[i];
3156       if (comp != nullptr) {
3157         print_times(comp->name(), comp->stats());
3158       }
3159     }
3160     if (_scc_stats._standard._count > 0) {
3161       print_times("SC", &_scc_stats);
3162     }
3163     if (aggregate) {
3164       tty->cr();
3165       tty->print_cr("Individual compilation Tier times (for compiled methods only)");
3166       tty->print_cr("------------------------------------------------");
3167       tty->cr();
3168     }
3169     char tier_name[256];
3170     for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3171       CompilerStatistics* stats = &_stats_per_level[tier-1];
3172       os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
3173       print_times(tier_name, stats);
3174     }
3175     for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3176       CompilerStatistics* stats = &_scc_stats_per_level[tier-1];
3177       if (stats->_standard._bytes > 0) {
3178         os::snprintf_checked(tier_name, sizeof(tier_name), "SC T%d", tier);
3179         print_times(tier_name, stats);
3180       }
3181     }
3182   }
3183 
3184   if (!aggregate) {
3185     return;
3186   }
3187 
3188   elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
3189   elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
3190   elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
3191 
3192   uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
3193   uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
3194 
3195   uint standard_compile_count = CompileBroker::_total_standard_compile_count;
3196   uint osr_compile_count = CompileBroker::_total_osr_compile_count;
3197   uint total_compile_count = CompileBroker::_total_compile_count;
3198   uint total_bailout_count = CompileBroker::_total_bailout_count;
3199   uint total_invalidated_count = CompileBroker::_total_invalidated_count;
3200 
3201   uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;

3203 
3204   tty->cr();
3205   tty->print_cr("Accumulated compiler times");
3206   tty->print_cr("----------------------------------------------------------");
3207                //0000000000111111111122222222223333333333444444444455555555556666666666
3208                //0123456789012345678901234567890123456789012345678901234567890123456789
3209   tty->print_cr("  Total compilation time   : %7.3f s", total_compilation.seconds());
3210   tty->print_cr("    Standard compilation   : %7.3f s, Average : %2.3f s",
3211                 standard_compilation.seconds(),
3212                 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
3213   tty->print_cr("    Bailed out compilation : %7.3f s, Average : %2.3f s",
3214                 CompileBroker::_t_bailedout_compilation.seconds(),
3215                 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
3216   tty->print_cr("    On stack replacement   : %7.3f s, Average : %2.3f s",
3217                 osr_compilation.seconds(),
3218                 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
3219   tty->print_cr("    Invalidated            : %7.3f s, Average : %2.3f s",
3220                 CompileBroker::_t_invalidated_compilation.seconds(),
3221                 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
3222 
3223   if (StoreCachedCode || LoadCachedCode) { // Check flags because SC cache could be closed already
3224     tty->cr();
3225     SCCache::print_timers_on(tty);
3226   }
3227   AbstractCompiler *comp = compiler(CompLevel_simple);
3228   if (comp != nullptr) {
3229     tty->cr();
3230     comp->print_timers();
3231   }
3232   comp = compiler(CompLevel_full_optimization);
3233   if (comp != nullptr) {
3234     tty->cr();
3235     comp->print_timers();
3236   }
3237   comp = _compilers[2];
3238   if (comp != nullptr) {
3239     tty->cr();
3240     comp->print_timers();
3241   }
3242 #if INCLUDE_JVMCI
3243   if (EnableJVMCI) {
3244     JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
3245     if (jvmci_comp != nullptr && jvmci_comp != comp) {
3246       tty->cr();
3247       jvmci_comp->print_timers();
3248     }
3249   }
3250 #endif
3251 
3252   tty->cr();
3253   tty->print_cr("  Total compiled methods    : %8u methods", total_compile_count);
3254   tty->print_cr("    Standard compilation    : %8u methods", standard_compile_count);
3255   tty->print_cr("    On stack replacement    : %8u methods", osr_compile_count);
3256   uint tcb = osr_bytes_compiled + standard_bytes_compiled;
3257   tty->print_cr("  Total compiled bytecodes  : %8u bytes", tcb);
3258   tty->print_cr("    Standard compilation    : %8u bytes", standard_bytes_compiled);
3259   tty->print_cr("    On stack replacement    : %8u bytes", osr_bytes_compiled);
3260   double tcs = total_compilation.seconds();
3261   uint bps = tcs == 0.0 ? 0 : (uint)(tcb / tcs);
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