1 /*
   2  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  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 "incls/_precompiled.incl"
  26 #include "incls/_compileBroker.cpp.incl"
  27 
  28 #ifdef DTRACE_ENABLED
  29 
  30 // Only bother with this argument setup if dtrace is available
  31 
  32 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin,
  33   char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t);
  34 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end,
  35   char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool);
  36 
  37 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method)              \
  38   {                                                                      \
  39     char* comp_name = (char*)(compiler)->name();                         \
  40     symbolOop klass_name = (method)->klass_name();                       \
  41     symbolOop name = (method)->name();                                   \
  42     symbolOop signature = (method)->signature();                         \
  43     HS_DTRACE_PROBE8(hotspot, method__compile__begin,                    \
  44       comp_name, strlen(comp_name),                                      \
  45       klass_name->bytes(), klass_name->utf8_length(),                    \
  46       name->bytes(), name->utf8_length(),                                \
  47       signature->bytes(), signature->utf8_length());                     \
  48   }
  49 
  50 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success)       \
  51   {                                                                      \
  52     char* comp_name = (char*)(compiler)->name();                         \
  53     symbolOop klass_name = (method)->klass_name();                       \
  54     symbolOop name = (method)->name();                                   \
  55     symbolOop signature = (method)->signature();                         \
  56     HS_DTRACE_PROBE9(hotspot, method__compile__end,                      \
  57       comp_name, strlen(comp_name),                                      \
  58       klass_name->bytes(), klass_name->utf8_length(),                    \
  59       name->bytes(), name->utf8_length(),                                \
  60       signature->bytes(), signature->utf8_length(), (success));          \
  61   }
  62 
  63 #else //  ndef DTRACE_ENABLED
  64 
  65 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method)
  66 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success)
  67 
  68 #endif // ndef DTRACE_ENABLED
  69 
  70 bool CompileBroker::_initialized = false;
  71 volatile bool CompileBroker::_should_block = false;
  72 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
  73 
  74 // The installed compiler(s)
  75 AbstractCompiler* CompileBroker::_compilers[2];
  76 
  77 // These counters are used for assigning id's to each compilation
  78 uint CompileBroker::_compilation_id        = 0;
  79 uint CompileBroker::_osr_compilation_id    = 0;
  80 
  81 // Debugging information
  82 int  CompileBroker::_last_compile_type     = no_compile;
  83 int  CompileBroker::_last_compile_level    = CompLevel_none;
  84 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
  85 
  86 // Performance counters
  87 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
  88 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
  89 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
  90 
  91 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
  92 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
  93 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
  94 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
  95 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
  96 
  97 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
  98 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
  99 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
 100 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
 101 
 102 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
 103 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
 104 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
 105 PerfVariable*       CompileBroker::_perf_last_compile_type = NULL;
 106 PerfVariable*       CompileBroker::_perf_last_compile_size = NULL;
 107 PerfVariable*       CompileBroker::_perf_last_failed_type = NULL;
 108 PerfVariable*       CompileBroker::_perf_last_invalidated_type = NULL;
 109 
 110 // Timers and counters for generating statistics
 111 elapsedTimer CompileBroker::_t_total_compilation;
 112 elapsedTimer CompileBroker::_t_osr_compilation;
 113 elapsedTimer CompileBroker::_t_standard_compilation;
 114 
 115 int CompileBroker::_total_bailout_count          = 0;
 116 int CompileBroker::_total_invalidated_count      = 0;
 117 int CompileBroker::_total_compile_count          = 0;
 118 int CompileBroker::_total_osr_compile_count      = 0;
 119 int CompileBroker::_total_standard_compile_count = 0;
 120 
 121 int CompileBroker::_sum_osr_bytes_compiled       = 0;
 122 int CompileBroker::_sum_standard_bytes_compiled  = 0;
 123 int CompileBroker::_sum_nmethod_size             = 0;
 124 int CompileBroker::_sum_nmethod_code_size        = 0;
 125 
 126 CompileQueue* CompileBroker::_method_queue   = NULL;
 127 CompileTask*  CompileBroker::_task_free_list = NULL;
 128 
 129 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL;
 130 
 131 // CompileTaskWrapper
 132 //
 133 // Assign this task to the current thread.  Deallocate the task
 134 // when the compilation is complete.
 135 class CompileTaskWrapper : StackObj {
 136 public:
 137   CompileTaskWrapper(CompileTask* task);
 138   ~CompileTaskWrapper();
 139 };
 140 
 141 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
 142   CompilerThread* thread = CompilerThread::current();
 143   thread->set_task(task);
 144   CompileLog*     log  = thread->log();
 145   if (log != NULL)  task->log_task_start(log);
 146 }
 147 
 148 CompileTaskWrapper::~CompileTaskWrapper() {
 149   CompilerThread* thread = CompilerThread::current();
 150   CompileTask* task = thread->task();
 151   CompileLog*  log  = thread->log();
 152   if (log != NULL)  task->log_task_done(log);
 153   thread->set_task(NULL);
 154   task->set_code_handle(NULL);
 155   DEBUG_ONLY(thread->set_env((ciEnv*)badAddress));
 156   if (task->is_blocking()) {
 157     MutexLocker notifier(task->lock(), thread);
 158     task->mark_complete();
 159     // Notify the waiting thread that the compilation has completed.
 160     task->lock()->notify_all();
 161   } else {
 162     task->mark_complete();
 163 
 164     // By convention, the compiling thread is responsible for
 165     // recycling a non-blocking CompileTask.
 166     CompileBroker::free_task(task);
 167   }
 168 }
 169 
 170 
 171 // ------------------------------------------------------------------
 172 // CompileTask::initialize
 173 void CompileTask::initialize(int compile_id,
 174                              methodHandle method,
 175                              int osr_bci,
 176                              int comp_level,
 177                              methodHandle hot_method,
 178                              int hot_count,
 179                              const char* comment,
 180                              bool is_blocking) {
 181   assert(!_lock->is_locked(), "bad locking");
 182 
 183   _compile_id = compile_id;
 184   _method = JNIHandles::make_global(method);
 185   _osr_bci = osr_bci;
 186   _is_blocking = is_blocking;
 187   _comp_level = comp_level;
 188   _num_inlined_bytecodes = 0;
 189 
 190   _is_complete = false;
 191   _is_success = false;
 192   _code_handle = NULL;
 193 
 194   _hot_method = NULL;
 195   _hot_count = hot_count;
 196   _time_queued = 0;  // tidy
 197   _comment = comment;
 198 
 199   if (LogCompilation) {
 200     _time_queued = os::elapsed_counter();
 201     if (hot_method.not_null()) {
 202       if (hot_method == method) {
 203         _hot_method = _method;
 204       } else {
 205         _hot_method = JNIHandles::make_global(hot_method);
 206       }
 207     }
 208   }
 209 
 210   _next = NULL;
 211 }
 212 
 213 // ------------------------------------------------------------------
 214 // CompileTask::code/set_code
 215 nmethod* CompileTask::code() const {
 216   if (_code_handle == NULL)  return NULL;
 217   return _code_handle->code();
 218 }
 219 void CompileTask::set_code(nmethod* nm) {
 220   if (_code_handle == NULL && nm == NULL)  return;
 221   guarantee(_code_handle != NULL, "");
 222   _code_handle->set_code(nm);
 223   if (nm == NULL)  _code_handle = NULL;  // drop the handle also
 224 }
 225 
 226 // ------------------------------------------------------------------
 227 // CompileTask::free
 228 void CompileTask::free() {
 229   set_code(NULL);
 230   assert(!_lock->is_locked(), "Should not be locked when freed");
 231   if (_hot_method != NULL && _hot_method != _method) {
 232     JNIHandles::destroy_global(_hot_method);
 233   }
 234   JNIHandles::destroy_global(_method);
 235 }
 236 
 237 
 238 // ------------------------------------------------------------------
 239 // CompileTask::print
 240 void CompileTask::print() {
 241   tty->print("<CompileTask compile_id=%d ", _compile_id);
 242   tty->print("method=");
 243   ((methodOop)JNIHandles::resolve(_method))->print_name(tty);
 244   tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
 245              _osr_bci, bool_to_str(_is_blocking),
 246              bool_to_str(_is_complete), bool_to_str(_is_success));
 247 }
 248 
 249 // ------------------------------------------------------------------
 250 // CompileTask::print_line_on_error
 251 //
 252 // This function is called by fatal error handler when the thread
 253 // causing troubles is a compiler thread.
 254 //
 255 // Do not grab any lock, do not allocate memory.
 256 //
 257 // Otherwise it's the same as CompileTask::print_line()
 258 //
 259 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
 260   methodOop method = (methodOop)JNIHandles::resolve(_method);
 261 
 262   // print compiler name
 263   st->print("%s:", CompileBroker::compiler(comp_level())->name());
 264 
 265   // print compilation number
 266   st->print("%3d", compile_id());
 267 
 268   // print method attributes
 269   const bool is_osr = osr_bci() != CompileBroker::standard_entry_bci;
 270   { const char blocking_char  = is_blocking()                      ? 'b' : ' ';
 271     const char compile_type   = is_osr                             ? '%' : ' ';
 272     const char sync_char      = method->is_synchronized()          ? 's' : ' ';
 273     const char exception_char = method->has_exception_handler()    ? '!' : ' ';
 274     const char tier_char      =
 275       is_highest_tier_compile(comp_level())                        ? ' ' : ('0' + comp_level());
 276     st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, tier_char);
 277   }
 278 
 279   // Use buf to get method name and signature
 280   if (method != NULL) st->print("%s", method->name_and_sig_as_C_string(buf, buflen));
 281 
 282   // print osr_bci if any
 283   if (is_osr) st->print(" @ %d", osr_bci());
 284 
 285   // print method size
 286   st->print_cr(" (%d bytes)", method->code_size());
 287 }
 288 
 289 // ------------------------------------------------------------------
 290 // CompileTask::print_line
 291 void CompileTask::print_line() {
 292   Thread *thread = Thread::current();
 293   methodHandle method(thread,
 294                       (methodOop)JNIHandles::resolve(method_handle()));
 295   ResourceMark rm(thread);
 296 
 297   ttyLocker ttyl;  // keep the following output all in one block
 298 
 299   // print compiler name if requested
 300   if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name());
 301 
 302   // print compilation number
 303   tty->print("%3d", compile_id());
 304 
 305   // print method attributes
 306   const bool is_osr = osr_bci() != CompileBroker::standard_entry_bci;
 307   { const char blocking_char  = is_blocking()                      ? 'b' : ' ';
 308     const char compile_type   = is_osr                             ? '%' : ' ';
 309     const char sync_char      = method->is_synchronized()          ? 's' : ' ';
 310     const char exception_char = method->has_exception_handler()    ? '!' : ' ';
 311     const char tier_char      =
 312       is_highest_tier_compile(comp_level())                        ? ' ' : ('0' + comp_level());
 313     tty->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, tier_char);
 314   }
 315 
 316   // print method name
 317   method->print_short_name(tty);
 318 
 319   // print osr_bci if any
 320   if (is_osr) tty->print(" @ %d", osr_bci());
 321 
 322   // print method size
 323   tty->print_cr(" (%d bytes)", method->code_size());
 324 }
 325 
 326 
 327 // ------------------------------------------------------------------
 328 // CompileTask::log_task
 329 void CompileTask::log_task(xmlStream* log) {
 330   Thread* thread = Thread::current();
 331   methodHandle method(thread,
 332                       (methodOop)JNIHandles::resolve(method_handle()));
 333   ResourceMark rm(thread);
 334 
 335   // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
 336   if (_compile_id != 0)   log->print(" compile_id='%d'", _compile_id);
 337   if (_osr_bci != CompileBroker::standard_entry_bci) {
 338     log->print(" compile_kind='osr'");  // same as nmethod::compile_kind
 339   } // else compile_kind='c2c'
 340   if (!method.is_null())  log->method(method);
 341   if (_osr_bci != CompileBroker::standard_entry_bci) {
 342     log->print(" osr_bci='%d'", _osr_bci);
 343   }
 344   if (_comp_level != CompLevel_highest_tier) {
 345     log->print(" level='%d'", _comp_level);
 346   }
 347   if (_is_blocking) {
 348     log->print(" blocking='1'");
 349   }
 350   log->stamp();
 351 }
 352 
 353 
 354 // ------------------------------------------------------------------
 355 // CompileTask::log_task_queued
 356 void CompileTask::log_task_queued() {
 357   Thread* thread = Thread::current();
 358   ttyLocker ttyl;
 359   ResourceMark rm(thread);
 360 
 361   xtty->begin_elem("task_queued");
 362   log_task(xtty);
 363   if (_comment != NULL) {
 364     xtty->print(" comment='%s'", _comment);
 365   }
 366   if (_hot_method != NULL) {
 367     methodHandle hot(thread,
 368                      (methodOop)JNIHandles::resolve(_hot_method));
 369     methodHandle method(thread,
 370                         (methodOop)JNIHandles::resolve(_method));
 371     if (hot() != method()) {
 372       xtty->method(hot);
 373     }
 374   }
 375   if (_hot_count != 0) {
 376     xtty->print(" hot_count='%d'", _hot_count);
 377   }
 378   xtty->end_elem();
 379 }
 380 
 381 
 382 // ------------------------------------------------------------------
 383 // CompileTask::log_task_start
 384 void CompileTask::log_task_start(CompileLog* log)   {
 385   log->begin_head("task");
 386   log_task(log);
 387   log->end_head();
 388 }
 389 
 390 
 391 // ------------------------------------------------------------------
 392 // CompileTask::log_task_done
 393 void CompileTask::log_task_done(CompileLog* log) {
 394   Thread* thread = Thread::current();
 395   methodHandle method(thread,
 396                       (methodOop)JNIHandles::resolve(method_handle()));
 397   ResourceMark rm(thread);
 398 
 399   // <task_done ... stamp='1.234'>  </task>
 400   nmethod* nm = code();
 401   log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
 402                   _is_success, nm == NULL ? 0 : nm->instructions_size(),
 403                   method->invocation_count());
 404   int bec = method->backedge_count();
 405   if (bec != 0)  log->print(" backedge_count='%d'", bec);
 406   // Note:  "_is_complete" is about to be set, but is not.
 407   if (_num_inlined_bytecodes != 0) {
 408     log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
 409   }
 410   log->stamp();
 411   log->end_elem();
 412   log->tail("task");
 413   log->clear_identities();   // next task will have different CI
 414   if (log->unflushed_count() > 2000) {
 415     log->flush();
 416   }
 417   log->mark_file_end();
 418 }
 419 
 420 
 421 
 422 // ------------------------------------------------------------------
 423 // CompileQueue::add
 424 //
 425 // Add a CompileTask to a CompileQueue
 426 void CompileQueue::add(CompileTask* task) {
 427   assert(lock()->owned_by_self(), "must own lock");
 428 
 429   task->set_next(NULL);
 430 
 431   if (_last == NULL) {
 432     // The compile queue is empty.
 433     assert(_first == NULL, "queue is empty");
 434     _first = task;
 435     _last = task;
 436   } else {
 437     // Append the task to the queue.
 438     assert(_last->next() == NULL, "not last");
 439     _last->set_next(task);
 440     _last = task;
 441   }
 442 
 443   // Mark the method as being in the compile queue.
 444   ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation();
 445 
 446   if (CIPrintCompileQueue) {
 447     print();
 448   }
 449 
 450   if (LogCompilation && xtty != NULL) {
 451     task->log_task_queued();
 452   }
 453 
 454   // Notify CompilerThreads that a task is available.
 455   lock()->notify();
 456 }
 457 
 458 
 459 // ------------------------------------------------------------------
 460 // CompileQueue::get
 461 //
 462 // Get the next CompileTask from a CompileQueue
 463 CompileTask* CompileQueue::get() {
 464   NMethodSweeper::possibly_sweep();
 465 
 466   MutexLocker locker(lock());
 467 
 468   // Wait for an available CompileTask.
 469   while (_first == NULL) {
 470     // There is no work to be done right now.  Wait.
 471     if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
 472       // During the emergency sweeping periods, wake up and sweep occasionally
 473       bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
 474       if (timedout) {
 475         MutexUnlocker ul(lock());
 476         // When otherwise not busy, run nmethod sweeping
 477         NMethodSweeper::possibly_sweep();
 478       }
 479     } else {
 480       // During normal operation no need to wake up on timer
 481       lock()->wait();
 482     }
 483   }
 484 
 485   CompileTask* task = _first;
 486 
 487   // Update queue first and last
 488   _first =_first->next();
 489   if (_first == NULL) {
 490     _last = NULL;
 491   }
 492 
 493   return task;
 494 
 495 }
 496 
 497 
 498 // ------------------------------------------------------------------
 499 // CompileQueue::print
 500 void CompileQueue::print() {
 501   tty->print_cr("Contents of %s", name());
 502   tty->print_cr("----------------------");
 503   CompileTask* task = _first;
 504   while (task != NULL) {
 505     task->print_line();
 506     task = task->next();
 507   }
 508   tty->print_cr("----------------------");
 509 }
 510 
 511 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
 512 
 513   _current_method[0] = '\0';
 514   _compile_type = CompileBroker::no_compile;
 515 
 516   if (UsePerfData) {
 517     ResourceMark rm;
 518 
 519     // create the thread instance name space string - don't create an
 520     // instance subspace if instance is -1 - keeps the adapterThread
 521     // counters  from having a ".0" namespace.
 522     const char* thread_i = (instance == -1) ? thread_name :
 523                       PerfDataManager::name_space(thread_name, instance);
 524 
 525 
 526     char* name = PerfDataManager::counter_name(thread_i, "method");
 527     _perf_current_method =
 528                PerfDataManager::create_string_variable(SUN_CI, name,
 529                                                        cmname_buffer_length,
 530                                                        _current_method, CHECK);
 531 
 532     name = PerfDataManager::counter_name(thread_i, "type");
 533     _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
 534                                                           PerfData::U_None,
 535                                                          (jlong)_compile_type,
 536                                                           CHECK);
 537 
 538     name = PerfDataManager::counter_name(thread_i, "time");
 539     _perf_time = PerfDataManager::create_counter(SUN_CI, name,
 540                                                  PerfData::U_Ticks, CHECK);
 541 
 542     name = PerfDataManager::counter_name(thread_i, "compiles");
 543     _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
 544                                                      PerfData::U_Events, CHECK);
 545   }
 546 }
 547 
 548 
 549 // ------------------------------------------------------------------
 550 // CompileBroker::compilation_init
 551 //
 552 // Initialize the Compilation object
 553 void CompileBroker::compilation_init() {
 554   _last_method_compiled[0] = '\0';
 555 
 556   // Set the interface to the current compiler(s).
 557 #ifdef COMPILER1
 558   _compilers[0] = new Compiler();
 559 #ifndef COMPILER2
 560   _compilers[1] = _compilers[0];
 561 #endif
 562 #endif // COMPILER1
 563 
 564 #ifdef COMPILER2
 565   _compilers[1] = new C2Compiler();
 566 #ifndef COMPILER1
 567   _compilers[0] = _compilers[1];
 568 #endif
 569 #endif // COMPILER2
 570 
 571 #ifdef SHARK
 572 #if defined(COMPILER1) || defined(COMPILER2)
 573 #error "Can't use COMPILER1 or COMPILER2 with shark"
 574 #endif
 575   _compilers[0] = new SharkCompiler();
 576   _compilers[1] = _compilers[0];  
 577 #endif
 578   
 579   // Initialize the CompileTask free list
 580   _task_free_list = NULL;
 581 
 582   // Start the CompilerThreads
 583   init_compiler_threads(compiler_count());
 584 
 585 
 586   // totalTime performance counter is always created as it is required
 587   // by the implementation of java.lang.management.CompilationMBean.
 588   {
 589     EXCEPTION_MARK;
 590     _perf_total_compilation =
 591                  PerfDataManager::create_counter(JAVA_CI, "totalTime",
 592                                                  PerfData::U_Ticks, CHECK);
 593   }
 594 
 595 
 596   if (UsePerfData) {
 597 
 598     EXCEPTION_MARK;
 599 
 600     // create the jvmstat performance counters
 601     _perf_osr_compilation =
 602                  PerfDataManager::create_counter(SUN_CI, "osrTime",
 603                                                  PerfData::U_Ticks, CHECK);
 604 
 605     _perf_standard_compilation =
 606                  PerfDataManager::create_counter(SUN_CI, "standardTime",
 607                                                  PerfData::U_Ticks, CHECK);
 608 
 609     _perf_total_bailout_count =
 610                  PerfDataManager::create_counter(SUN_CI, "totalBailouts",
 611                                                  PerfData::U_Events, CHECK);
 612 
 613     _perf_total_invalidated_count =
 614                  PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
 615                                                  PerfData::U_Events, CHECK);
 616 
 617     _perf_total_compile_count =
 618                  PerfDataManager::create_counter(SUN_CI, "totalCompiles",
 619                                                  PerfData::U_Events, CHECK);
 620     _perf_total_osr_compile_count =
 621                  PerfDataManager::create_counter(SUN_CI, "osrCompiles",
 622                                                  PerfData::U_Events, CHECK);
 623 
 624     _perf_total_standard_compile_count =
 625                  PerfDataManager::create_counter(SUN_CI, "standardCompiles",
 626                                                  PerfData::U_Events, CHECK);
 627 
 628     _perf_sum_osr_bytes_compiled =
 629                  PerfDataManager::create_counter(SUN_CI, "osrBytes",
 630                                                  PerfData::U_Bytes, CHECK);
 631 
 632     _perf_sum_standard_bytes_compiled =
 633                  PerfDataManager::create_counter(SUN_CI, "standardBytes",
 634                                                  PerfData::U_Bytes, CHECK);
 635 
 636     _perf_sum_nmethod_size =
 637                  PerfDataManager::create_counter(SUN_CI, "nmethodSize",
 638                                                  PerfData::U_Bytes, CHECK);
 639 
 640     _perf_sum_nmethod_code_size =
 641                  PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
 642                                                  PerfData::U_Bytes, CHECK);
 643 
 644     _perf_last_method =
 645                  PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
 646                                        CompilerCounters::cmname_buffer_length,
 647                                        "", CHECK);
 648 
 649     _perf_last_failed_method =
 650             PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
 651                                        CompilerCounters::cmname_buffer_length,
 652                                        "", CHECK);
 653 
 654     _perf_last_invalidated_method =
 655         PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
 656                                      CompilerCounters::cmname_buffer_length,
 657                                      "", CHECK);
 658 
 659     _perf_last_compile_type =
 660              PerfDataManager::create_variable(SUN_CI, "lastType",
 661                                               PerfData::U_None,
 662                                               (jlong)CompileBroker::no_compile,
 663                                               CHECK);
 664 
 665     _perf_last_compile_size =
 666              PerfDataManager::create_variable(SUN_CI, "lastSize",
 667                                               PerfData::U_Bytes,
 668                                               (jlong)CompileBroker::no_compile,
 669                                               CHECK);
 670 
 671 
 672     _perf_last_failed_type =
 673              PerfDataManager::create_variable(SUN_CI, "lastFailedType",
 674                                               PerfData::U_None,
 675                                               (jlong)CompileBroker::no_compile,
 676                                               CHECK);
 677 
 678     _perf_last_invalidated_type =
 679          PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
 680                                           PerfData::U_None,
 681                                           (jlong)CompileBroker::no_compile,
 682                                           CHECK);
 683   }
 684 
 685   _initialized = true;
 686 }
 687 
 688 
 689 
 690 // ------------------------------------------------------------------
 691 // CompileBroker::make_compiler_thread
 692 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
 693   CompilerThread* compiler_thread = NULL;
 694 
 695   klassOop k =
 696     SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_Thread(),
 697                                       true, CHECK_0);
 698   instanceKlassHandle klass (THREAD, k);
 699   instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
 700   Handle string = java_lang_String::create_from_str(name, CHECK_0);
 701 
 702   // Initialize thread_oop to put it into the system threadGroup
 703   Handle thread_group (THREAD,  Universe::system_thread_group());
 704   JavaValue result(T_VOID);
 705   JavaCalls::call_special(&result, thread_oop,
 706                        klass,
 707                        vmSymbolHandles::object_initializer_name(),
 708                        vmSymbolHandles::threadgroup_string_void_signature(),
 709                        thread_group,
 710                        string,
 711                        CHECK_0);
 712 
 713   {
 714     MutexLocker mu(Threads_lock, THREAD);
 715     compiler_thread = new CompilerThread(queue, counters);
 716     // At this point the new CompilerThread data-races with this startup
 717     // thread (which I believe is the primoridal thread and NOT the VM
 718     // thread).  This means Java bytecodes being executed at startup can
 719     // queue compile jobs which will run at whatever default priority the
 720     // newly created CompilerThread runs at.
 721 
 722 
 723     // At this point it may be possible that no osthread was created for the
 724     // JavaThread due to lack of memory. We would have to throw an exception
 725     // in that case. However, since this must work and we do not allow
 726     // exceptions anyway, check and abort if this fails.
 727 
 728     if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
 729       vm_exit_during_initialization("java.lang.OutOfMemoryError",
 730                                     "unable to create new native thread");
 731     }
 732 
 733     java_lang_Thread::set_thread(thread_oop(), compiler_thread);
 734 
 735     // Note that this only sets the JavaThread _priority field, which by
 736     // definition is limited to Java priorities and not OS priorities.
 737     // The os-priority is set in the CompilerThread startup code itself
 738     java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
 739     // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler
 740     // threads never have their OS priority set.  The assumption here is to
 741     // enable the Performance group to do flag tuning, figure out a suitable
 742     // CompilerThreadPriority, and then remove this 'if' statement (and
 743     // comment) and unconditionally set the priority.
 744 
 745     // Compiler Threads should be at the highest Priority
 746     if ( CompilerThreadPriority != -1 )
 747       os::set_native_priority( compiler_thread, CompilerThreadPriority );
 748     else
 749       os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]);
 750 
 751       // Note that I cannot call os::set_priority because it expects Java
 752       // priorities and I am *explicitly* using OS priorities so that it's
 753       // possible to set the compiler thread priority higher than any Java
 754       // thread.
 755 
 756     java_lang_Thread::set_daemon(thread_oop());
 757 
 758     compiler_thread->set_threadObj(thread_oop());
 759     Threads::add(compiler_thread);
 760     Thread::start(compiler_thread);
 761   }
 762   // Let go of Threads_lock before yielding
 763   os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
 764 
 765   return compiler_thread;
 766 }
 767 
 768 
 769 // ------------------------------------------------------------------
 770 // CompileBroker::init_compiler_threads
 771 //
 772 // Initialize the compilation queue
 773 void CompileBroker::init_compiler_threads(int compiler_count) {
 774   EXCEPTION_MARK;
 775 
 776   _method_queue  = new CompileQueue("MethodQueue",  MethodCompileQueue_lock);
 777   _method_threads =
 778     new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true);
 779 
 780   char name_buffer[256];
 781   int i;
 782   for (i = 0; i < compiler_count; i++) {
 783     // Create a name for our thread.
 784     sprintf(name_buffer, "CompilerThread%d", i);
 785     CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
 786 
 787     CompilerThread* new_thread = make_compiler_thread(name_buffer, _method_queue, counters, CHECK);
 788     _method_threads->append(new_thread);
 789   }
 790   if (UsePerfData) {
 791     PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
 792                                      compiler_count, CHECK);
 793   }
 794 }
 795 
 796 // ------------------------------------------------------------------
 797 // CompileBroker::is_idle
 798 bool CompileBroker::is_idle() {
 799   if (!_method_queue->is_empty()) {
 800     return false;
 801   } else {
 802     int num_threads = _method_threads->length();
 803     for (int i=0; i<num_threads; i++) {
 804       if (_method_threads->at(i)->task() != NULL) {
 805         return false;
 806       }
 807     }
 808 
 809     // No pending or active compilations.
 810     return true;
 811   }
 812 }
 813 
 814 
 815 // ------------------------------------------------------------------
 816 // CompileBroker::compile_method
 817 //
 818 // Request compilation of a method.
 819 void CompileBroker::compile_method_base(methodHandle method,
 820                                         int osr_bci,
 821                                         int comp_level,
 822                                         methodHandle hot_method,
 823                                         int hot_count,
 824                                         const char* comment,
 825                                         TRAPS) {
 826   // do nothing if compiler thread(s) is not available
 827   if (!_initialized ) {
 828     return;
 829   }
 830 
 831   guarantee(!method->is_abstract(), "cannot compile abstract methods");
 832   assert(method->method_holder()->klass_part()->oop_is_instance(),
 833          "sanity check");
 834   assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(),
 835          "method holder must be initialized");
 836 
 837   if (CIPrintRequests) {
 838     tty->print("request: ");
 839     method->print_short_name(tty);
 840     if (osr_bci != InvocationEntryBci) {
 841       tty->print(" osr_bci: %d", osr_bci);
 842     }
 843     tty->print(" comment: %s count: %d", comment, hot_count);
 844     if (!hot_method.is_null()) {
 845       tty->print(" hot: ");
 846       if (hot_method() != method()) {
 847           hot_method->print_short_name(tty);
 848       } else {
 849         tty->print("yes");
 850       }
 851     }
 852     tty->cr();
 853   }
 854 
 855   // A request has been made for compilation.  Before we do any
 856   // real work, check to see if the method has been compiled
 857   // in the meantime with a definitive result.
 858   if (compilation_is_complete(method, osr_bci, comp_level)) {
 859     return;
 860   }
 861 
 862   // If this method is already in the compile queue, then
 863   // we do not block the current thread.
 864   if (compilation_is_in_queue(method, osr_bci)) {
 865     // We may want to decay our counter a bit here to prevent
 866     // multiple denied requests for compilation.  This is an
 867     // open compilation policy issue. Note: The other possibility,
 868     // in the case that this is a blocking compile request, is to have
 869     // all subsequent blocking requesters wait for completion of
 870     // ongoing compiles. Note that in this case we'll need a protocol
 871     // for freeing the associated compile tasks. [Or we could have
 872     // a single static monitor on which all these waiters sleep.]
 873     return;
 874   }
 875 
 876   // Outputs from the following MutexLocker block:
 877   CompileTask* task     = NULL;
 878   bool         blocking = false;
 879 
 880   // Acquire our lock.
 881   {
 882     MutexLocker locker(_method_queue->lock(), THREAD);
 883 
 884     // Make sure the method has not slipped into the queues since
 885     // last we checked; note that those checks were "fast bail-outs".
 886     // Here we need to be more careful, see 14012000 below.
 887     if (compilation_is_in_queue(method, osr_bci)) {
 888       return;
 889     }
 890 
 891     // We need to check again to see if the compilation has
 892     // completed.  A previous compilation may have registered
 893     // some result.
 894     if (compilation_is_complete(method, osr_bci, comp_level)) {
 895       return;
 896     }
 897 
 898     // We now know that this compilation is not pending, complete,
 899     // or prohibited.  Assign a compile_id to this compilation
 900     // and check to see if it is in our [Start..Stop) range.
 901     uint compile_id = assign_compile_id(method, osr_bci);
 902     if (compile_id == 0) {
 903       // The compilation falls outside the allowed range.
 904       return;
 905     }
 906 
 907     // Should this thread wait for completion of the compile?
 908     blocking = is_compile_blocking(method, osr_bci);
 909 
 910     // We will enter the compilation in the queue.
 911     // 14012000: Note that this sets the queued_for_compile bits in
 912     // the target method. We can now reason that a method cannot be
 913     // queued for compilation more than once, as follows:
 914     // Before a thread queues a task for compilation, it first acquires
 915     // the compile queue lock, then checks if the method's queued bits
 916     // are set or it has already been compiled. Thus there can not be two
 917     // instances of a compilation task for the same method on the
 918     // compilation queue. Consider now the case where the compilation
 919     // thread has already removed a task for that method from the queue
 920     // and is in the midst of compiling it. In this case, the
 921     // queued_for_compile bits must be set in the method (and these
 922     // will be visible to the current thread, since the bits were set
 923     // under protection of the compile queue lock, which we hold now.
 924     // When the compilation completes, the compiler thread first sets
 925     // the compilation result and then clears the queued_for_compile
 926     // bits. Neither of these actions are protected by a barrier (or done
 927     // under the protection of a lock), so the only guarantee we have
 928     // (on machines with TSO (Total Store Order)) is that these values
 929     // will update in that order. As a result, the only combinations of
 930     // these bits that the current thread will see are, in temporal order:
 931     // <RESULT, QUEUE> :
 932     //     <0, 1> : in compile queue, but not yet compiled
 933     //     <1, 1> : compiled but queue bit not cleared
 934     //     <1, 0> : compiled and queue bit cleared
 935     // Because we first check the queue bits then check the result bits,
 936     // we are assured that we cannot introduce a duplicate task.
 937     // Note that if we did the tests in the reverse order (i.e. check
 938     // result then check queued bit), we could get the result bit before
 939     // the compilation completed, and the queue bit after the compilation
 940     // completed, and end up introducing a "duplicate" (redundant) task.
 941     // In that case, the compiler thread should first check if a method
 942     // has already been compiled before trying to compile it.
 943     // NOTE: in the event that there are multiple compiler threads and
 944     // there is de-optimization/recompilation, things will get hairy,
 945     // and in that case it's best to protect both the testing (here) of
 946     // these bits, and their updating (here and elsewhere) under a
 947     // common lock.
 948     task = create_compile_task(_method_queue,
 949                                compile_id, method,
 950                                osr_bci, comp_level,
 951                                hot_method, hot_count, comment,
 952                                blocking);
 953   }
 954 
 955   if (blocking) {
 956     wait_for_completion(task);
 957   }
 958 }
 959 
 960 
 961 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
 962                                        methodHandle hot_method, int hot_count,
 963                                        const char* comment, TRAPS) {
 964   // make sure arguments make sense
 965   assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method");
 966   assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
 967   assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
 968   assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized");
 969 
 970   int comp_level = CompilationPolicy::policy()->compilation_level(method, osr_bci);
 971 
 972 #ifdef TIERED
 973   if (TieredCompilation && StressTieredRuntime) {
 974     static int flipper = 0;
 975     if (is_even(flipper++)) {
 976       comp_level = CompLevel_fast_compile;
 977     } else {
 978       comp_level = CompLevel_full_optimization;
 979     }
 980   }
 981 #ifdef SPARC
 982   // QQQ FIX ME
 983   // C2 only returns long results in G1 and c1 doesn't understand so disallow c2
 984   // compiles of long results
 985   if (TieredCompilation && method()->result_type() == T_LONG) {
 986     comp_level = CompLevel_fast_compile;
 987   }
 988 #endif // SPARC
 989 #endif // TIERED
 990 
 991   // return quickly if possible
 992 
 993   // lock, make sure that the compilation
 994   // isn't prohibited in a straightforward way.
 995 
 996   if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) {
 997     return NULL;
 998   }
 999 
1000   if (osr_bci == InvocationEntryBci) {
1001     // standard compilation
1002     nmethod* method_code = method->code();
1003     if (method_code != NULL
1004 #ifdef TIERED
1005        && ( method_code->is_compiled_by_c2() || comp_level == CompLevel_fast_compile )
1006 #endif // TIERED
1007       ) {
1008       return method_code;
1009     }
1010     if (method->is_not_compilable(comp_level)) return NULL;
1011 
1012     if (UseCodeCacheFlushing) {
1013       nmethod* saved = CodeCache::find_and_remove_saved_code(method());
1014       if (saved != NULL) {
1015         method->set_code(method, saved);
1016         return saved;
1017       }
1018     }
1019 
1020   } else {
1021     // osr compilation
1022 #ifndef TIERED
1023     // seems like an assert of dubious value
1024     assert(comp_level == CompLevel_full_optimization,
1025            "all OSR compiles are assumed to be at a single compilation lavel");
1026 #endif // TIERED
1027     nmethod* nm = method->lookup_osr_nmethod_for(osr_bci);
1028     if (nm != NULL) return nm;
1029     if (method->is_not_osr_compilable()) return NULL;
1030   }
1031 
1032   assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1033   // some prerequisites that are compiler specific
1034   if (compiler(comp_level)->is_c2()) {
1035     method->constants()->resolve_string_constants(CHECK_0);
1036     // Resolve all classes seen in the signature of the method
1037     // we are compiling.
1038     methodOopDesc::load_signature_classes(method, CHECK_0);
1039   }
1040 
1041   // If the method is native, do the lookup in the thread requesting
1042   // the compilation. Native lookups can load code, which is not
1043   // permitted during compilation.
1044   //
1045   // Note: A native method implies non-osr compilation which is
1046   //       checked with an assertion at the entry of this method.
1047   if (method->is_native()) {
1048     bool in_base_library;
1049     address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1050     if (HAS_PENDING_EXCEPTION) {
1051       // In case of an exception looking up the method, we just forget
1052       // about it. The interpreter will kick-in and throw the exception.
1053       method->set_not_compilable(); // implies is_not_osr_compilable()
1054       CLEAR_PENDING_EXCEPTION;
1055       return NULL;
1056     }
1057     assert(method->has_native_function(), "must have native code by now");
1058   }
1059 
1060   // RedefineClasses() has replaced this method; just return
1061   if (method->is_old()) {
1062     return NULL;
1063   }
1064 
1065   // JVMTI -- post_compile_event requires jmethod_id() that may require
1066   // a lock the compiling thread can not acquire. Prefetch it here.
1067   if (JvmtiExport::should_post_compiled_method_load()) {
1068     method->jmethod_id();
1069   }
1070 
1071   // If the compiler is shut off due to code cache flushing or otherwise,
1072   // fail out now so blocking compiles dont hang the java thread
1073   if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) {
1074     method->invocation_counter()->decay();
1075     method->backedge_counter()->decay();
1076     return NULL;
1077   }
1078 
1079   // do the compilation
1080   if (method->is_native()) {
1081     if (!PreferInterpreterNativeStubs) {
1082       (void) AdapterHandlerLibrary::create_native_wrapper(method);
1083     } else {
1084       return NULL;
1085     }
1086   } else {
1087     compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, CHECK_0);
1088   }
1089 
1090   // return requested nmethod
1091   return osr_bci  == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci);
1092 }
1093 
1094 
1095 // ------------------------------------------------------------------
1096 // CompileBroker::compilation_is_complete
1097 //
1098 // See if compilation of this method is already complete.
1099 bool CompileBroker::compilation_is_complete(methodHandle method,
1100                                             int          osr_bci,
1101                                             int          comp_level) {
1102   bool is_osr = (osr_bci != standard_entry_bci);
1103   if (is_osr) {
1104     if (method->is_not_osr_compilable()) {
1105       return true;
1106     } else {
1107       nmethod* result = method->lookup_osr_nmethod_for(osr_bci);
1108       return (result != NULL);
1109     }
1110   } else {
1111     if (method->is_not_compilable(comp_level)) {
1112       return true;
1113     } else {
1114       nmethod* result = method->code();
1115       if (result == NULL) return false;
1116 #ifdef TIERED
1117       if (comp_level == CompLevel_fast_compile) {
1118         // At worst the code is from c1
1119         return true;
1120       }
1121       // comp level must be full opt
1122       return result->is_compiled_by_c2();
1123 #endif // TIERED
1124       return true;
1125     }
1126   }
1127 }
1128 
1129 
1130 // ------------------------------------------------------------------
1131 // CompileBroker::compilation_is_in_queue
1132 //
1133 // See if this compilation is already requested.
1134 //
1135 // Implementation note: there is only a single "is in queue" bit
1136 // for each method.  This means that the check below is overly
1137 // conservative in the sense that an osr compilation in the queue
1138 // will block a normal compilation from entering the queue (and vice
1139 // versa).  This can be remedied by a full queue search to disambiguate
1140 // cases.  If it is deemed profitible, this may be done.
1141 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1142                                           int          osr_bci) {
1143   return method->queued_for_compilation();
1144 }
1145 
1146 
1147 // ------------------------------------------------------------------
1148 // CompileBroker::compilation_is_prohibited
1149 //
1150 // See if this compilation is not allowed.
1151 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1152   bool is_native = method->is_native();
1153   // Some compilers may not support the compilation of natives.
1154   // QQQ this needs some work ought to only record not compilable at
1155   // the specified level
1156   if (is_native &&
1157       (!CICompileNatives || !compiler(comp_level)->supports_native())) {
1158     method->set_not_compilable_quietly();
1159     return true;
1160   }
1161 
1162   bool is_osr = (osr_bci != standard_entry_bci);
1163   // Some compilers may not support on stack replacement.
1164   if (is_osr &&
1165       (!CICompileOSR || !compiler(comp_level)->supports_osr())) {
1166     method->set_not_osr_compilable();
1167     return true;
1168   }
1169 
1170   // The method may be explicitly excluded by the user.
1171   bool quietly;
1172   if (CompilerOracle::should_exclude(method, quietly)) {
1173     if (!quietly) {
1174       // This does not happen quietly...
1175       ResourceMark rm;
1176       tty->print("### Excluding %s:%s",
1177                  method->is_native() ? "generation of native wrapper" : "compile",
1178                  (method->is_static() ? " static" : ""));
1179       method->print_short_name(tty);
1180       tty->cr();
1181     }
1182     method->set_not_compilable_quietly();
1183   }
1184 
1185   return false;
1186 }
1187 
1188 
1189 // ------------------------------------------------------------------
1190 // CompileBroker::assign_compile_id
1191 //
1192 // Assign a serialized id number to this compilation request.  If the
1193 // number falls out of the allowed range, return a 0.  OSR
1194 // compilations may be numbered separately from regular compilations
1195 // if certain debugging flags are used.
1196 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1197   assert(_method_queue->lock()->owner() == JavaThread::current(),
1198          "must hold the compilation queue lock");
1199   bool is_osr = (osr_bci != standard_entry_bci);
1200   assert(!method->is_native(), "no longer compile natives");
1201   uint id;
1202   if (CICountOSR && is_osr) {
1203     id = ++_osr_compilation_id;
1204     if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1205       return id;
1206     }
1207   } else {
1208     id = ++_compilation_id;
1209     if ((uint)CIStart <= id && id < (uint)CIStop) {
1210       return id;
1211     }
1212   }
1213 
1214   // Method was not in the appropriate compilation range.
1215   method->set_not_compilable_quietly();
1216   return 0;
1217 }
1218 
1219 
1220 // ------------------------------------------------------------------
1221 // CompileBroker::is_compile_blocking
1222 //
1223 // Should the current thread be blocked until this compilation request
1224 // has been fulfilled?
1225 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1226   return !BackgroundCompilation;
1227 }
1228 
1229 
1230 // ------------------------------------------------------------------
1231 // CompileBroker::preload_classes
1232 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1233   // Move this code over from c1_Compiler.cpp
1234   ShouldNotReachHere();
1235 }
1236 
1237 
1238 // ------------------------------------------------------------------
1239 // CompileBroker::create_compile_task
1240 //
1241 // Create a CompileTask object representing the current request for
1242 // compilation.  Add this task to the queue.
1243 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1244                                               int           compile_id,
1245                                               methodHandle  method,
1246                                               int           osr_bci,
1247                                               int           comp_level,
1248                                               methodHandle  hot_method,
1249                                               int           hot_count,
1250                                               const char*   comment,
1251                                               bool          blocking) {
1252   CompileTask* new_task = allocate_task();
1253   new_task->initialize(compile_id, method, osr_bci, comp_level,
1254                        hot_method, hot_count, comment,
1255                        blocking);
1256   queue->add(new_task);
1257   return new_task;
1258 }
1259 
1260 
1261 // ------------------------------------------------------------------
1262 // CompileBroker::allocate_task
1263 //
1264 // Allocate a CompileTask, from the free list if possible.
1265 CompileTask* CompileBroker::allocate_task() {
1266   MutexLocker locker(CompileTaskAlloc_lock);
1267   CompileTask* task = NULL;
1268   if (_task_free_list != NULL) {
1269     task = _task_free_list;
1270     _task_free_list = task->next();
1271     task->set_next(NULL);
1272   } else {
1273     task = new CompileTask();
1274     task->set_next(NULL);
1275   }
1276   return task;
1277 }
1278 
1279 
1280 // ------------------------------------------------------------------
1281 // CompileBroker::free_task
1282 //
1283 // Add a task to the free list.
1284 void CompileBroker::free_task(CompileTask* task) {
1285   MutexLocker locker(CompileTaskAlloc_lock);
1286   task->free();
1287   task->set_next(_task_free_list);
1288   _task_free_list = task;
1289 }
1290 
1291 
1292 // ------------------------------------------------------------------
1293 // CompileBroker::wait_for_completion
1294 //
1295 // Wait for the given method CompileTask to complete.
1296 void CompileBroker::wait_for_completion(CompileTask* task) {
1297   if (CIPrintCompileQueue) {
1298     tty->print_cr("BLOCKING FOR COMPILE");
1299   }
1300 
1301   assert(task->is_blocking(), "can only wait on blocking task");
1302 
1303   JavaThread *thread = JavaThread::current();
1304   thread->set_blocked_on_compilation(true);
1305 
1306   methodHandle method(thread,
1307                       (methodOop)JNIHandles::resolve(task->method_handle()));
1308   {
1309     MutexLocker waiter(task->lock(), thread);
1310 
1311     while (!task->is_complete())
1312       task->lock()->wait();
1313   }
1314   // It is harmless to check this status without the lock, because
1315   // completion is a stable property (until the task object is recycled).
1316   assert(task->is_complete(), "Compilation should have completed");
1317   assert(task->code_handle() == NULL, "must be reset");
1318 
1319   thread->set_blocked_on_compilation(false);
1320 
1321   // By convention, the waiter is responsible for recycling a
1322   // blocking CompileTask. Since there is only one waiter ever
1323   // waiting on a CompileTask, we know that no one else will
1324   // be using this CompileTask; we can free it.
1325   free_task(task);
1326 }
1327 
1328 // ------------------------------------------------------------------
1329 // CompileBroker::compiler_thread_loop
1330 //
1331 // The main loop run by a CompilerThread.
1332 void CompileBroker::compiler_thread_loop() {
1333   CompilerThread* thread = CompilerThread::current();
1334   CompileQueue* queue = thread->queue();
1335 
1336   // For the thread that initializes the ciObjectFactory
1337   // this resource mark holds all the shared objects
1338   ResourceMark rm;
1339 
1340   // First thread to get here will initialize the compiler interface
1341 
1342   if (!ciObjectFactory::is_initialized()) {
1343     ASSERT_IN_VM;
1344     MutexLocker only_one (CompileThread_lock, thread);
1345     if (!ciObjectFactory::is_initialized()) {
1346       ciObjectFactory::initialize();
1347     }
1348   }
1349 
1350   // Open a log.
1351   if (LogCompilation) {
1352     init_compiler_thread_log();
1353   }
1354   CompileLog* log = thread->log();
1355   if (log != NULL) {
1356     log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'",
1357                     os::current_thread_id(),
1358                     os::current_process_id());
1359     log->stamp();
1360     log->end_elem();
1361   }
1362 
1363   while (true) {
1364     {
1365       // We need this HandleMark to avoid leaking VM handles.
1366       HandleMark hm(thread);
1367 
1368       if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) {
1369         // the code cache is really full
1370         handle_full_code_cache();
1371       } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) {
1372         // Attempt to start cleaning the code cache while there is still a little headroom
1373         NMethodSweeper::handle_full_code_cache(false);
1374       }
1375 
1376       CompileTask* task = queue->get();
1377 
1378       // Give compiler threads an extra quanta.  They tend to be bursty and
1379       // this helps the compiler to finish up the job.
1380       if( CompilerThreadHintNoPreempt )
1381         os::hint_no_preempt();
1382 
1383       // trace per thread time and compile statistics
1384       CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1385       PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1386 
1387       // Assign the task to the current thread.  Mark this compilation
1388       // thread as active for the profiler.
1389       CompileTaskWrapper ctw(task);
1390       nmethodLocker result_handle;  // (handle for the nmethod produced by this task)
1391       task->set_code_handle(&result_handle);
1392       methodHandle method(thread,
1393                      (methodOop)JNIHandles::resolve(task->method_handle()));
1394 
1395       // Never compile a method if breakpoints are present in it
1396       if (method()->number_of_breakpoints() == 0) {
1397         // Compile the method.
1398         if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1399 #ifdef COMPILER1
1400           // Allow repeating compilations for the purpose of benchmarking
1401           // compile speed. This is not useful for customers.
1402           if (CompilationRepeat != 0) {
1403             int compile_count = CompilationRepeat;
1404             while (compile_count > 0) {
1405               invoke_compiler_on_method(task);
1406               nmethod* nm = method->code();
1407               if (nm != NULL) {
1408                 nm->make_zombie();
1409                 method->clear_code();
1410               }
1411               compile_count--;
1412             }
1413           }
1414 #endif /* COMPILER1 */
1415           invoke_compiler_on_method(task);
1416         } else {
1417           // After compilation is disabled, remove remaining methods from queue
1418           method->clear_queued_for_compilation();
1419         }
1420       }
1421     }
1422   }
1423 }
1424 
1425 
1426 // ------------------------------------------------------------------
1427 // CompileBroker::init_compiler_thread_log
1428 //
1429 // Set up state required by +LogCompilation.
1430 void CompileBroker::init_compiler_thread_log() {
1431     CompilerThread* thread = CompilerThread::current();
1432     char  fileBuf[4*K];
1433     FILE* fp = NULL;
1434     char* file = NULL;
1435     intx thread_id = os::current_thread_id();
1436     for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1437       const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1438       if (dir == NULL) {
1439         jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log",
1440                      thread_id, os::current_process_id());
1441       } else {
1442         jio_snprintf(fileBuf, sizeof(fileBuf),
1443                      "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1444                      os::file_separator(), thread_id, os::current_process_id());
1445       }
1446       fp = fopen(fileBuf, "at");
1447       if (fp != NULL) {
1448         file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1);
1449         strcpy(file, fileBuf);
1450         break;
1451       }
1452     }
1453     if (fp == NULL) {
1454       warning("Cannot open log file: %s", fileBuf);
1455     } else {
1456       if (LogCompilation && Verbose)
1457         tty->print_cr("Opening compilation log %s", file);
1458       CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id);
1459       thread->init_log(log);
1460 
1461       if (xtty != NULL) {
1462         ttyLocker ttyl;
1463 
1464         // Record any per thread log files
1465         xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file);
1466       }
1467     }
1468 }
1469 
1470 // ------------------------------------------------------------------
1471 // CompileBroker::set_should_block
1472 //
1473 // Set _should_block.
1474 // Call this from the VM, with Threads_lock held and a safepoint requested.
1475 void CompileBroker::set_should_block() {
1476   assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1477   assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1478 #ifndef PRODUCT
1479   if (PrintCompilation && (Verbose || WizardMode))
1480     tty->print_cr("notifying compiler thread pool to block");
1481 #endif
1482   _should_block = true;
1483 }
1484 
1485 // ------------------------------------------------------------------
1486 // CompileBroker::maybe_block
1487 //
1488 // Call this from the compiler at convenient points, to poll for _should_block.
1489 void CompileBroker::maybe_block() {
1490   if (_should_block) {
1491 #ifndef PRODUCT
1492     if (PrintCompilation && (Verbose || WizardMode))
1493       tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1494 #endif
1495     ThreadInVMfromNative tivfn(JavaThread::current());
1496   }
1497 }
1498 
1499 
1500 // ------------------------------------------------------------------
1501 // CompileBroker::invoke_compiler_on_method
1502 //
1503 // Compile a method.
1504 //
1505 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1506   if (PrintCompilation) {
1507     ResourceMark rm;
1508     task->print_line();
1509   }
1510   elapsedTimer time;
1511 
1512   CompilerThread* thread = CompilerThread::current();
1513   ResourceMark rm(thread);
1514 
1515   // Common flags.
1516   uint compile_id = task->compile_id();
1517   int osr_bci = task->osr_bci();
1518   bool is_osr = (osr_bci != standard_entry_bci);
1519   bool should_log = (thread->log() != NULL);
1520   bool should_break = false;
1521   {
1522     // create the handle inside it's own block so it can't
1523     // accidentally be referenced once the thread transitions to
1524     // native.  The NoHandleMark before the transition should catch
1525     // any cases where this occurs in the future.
1526     methodHandle method(thread,
1527                         (methodOop)JNIHandles::resolve(task->method_handle()));
1528     should_break = check_break_at(method, compile_id, is_osr);
1529     if (should_log && !CompilerOracle::should_log(method)) {
1530       should_log = false;
1531     }
1532     assert(!method->is_native(), "no longer compile natives");
1533 
1534     // Save information about this method in case of failure.
1535     set_last_compile(thread, method, is_osr, task->comp_level());
1536 
1537     DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method);
1538   }
1539 
1540   // Allocate a new set of JNI handles.
1541   push_jni_handle_block();
1542   jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle()));
1543   int compilable = ciEnv::MethodCompilable;
1544   {
1545     int system_dictionary_modification_counter;
1546     {
1547       MutexLocker locker(Compile_lock, thread);
1548       system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1549     }
1550 
1551     NoHandleMark  nhm;
1552     ThreadToNativeFromVM ttn(thread);
1553 
1554     ciEnv ci_env(task, system_dictionary_modification_counter);
1555     if (should_break) {
1556       ci_env.set_break_at_compile(true);
1557     }
1558     if (should_log) {
1559       ci_env.set_log(thread->log());
1560     }
1561     assert(thread->env() == &ci_env, "set by ci_env");
1562     // The thread-env() field is cleared in ~CompileTaskWrapper.
1563 
1564     // Cache Jvmti state
1565     ci_env.cache_jvmti_state();
1566 
1567     // Cache DTrace flags
1568     ci_env.cache_dtrace_flags();
1569 
1570     ciMethod* target = ci_env.get_method_from_handle(target_handle);
1571 
1572     TraceTime t1("compilation", &time);
1573 
1574     compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci);
1575 
1576     if (!ci_env.failing() && task->code() == NULL) {
1577       //assert(false, "compiler should always document failure");
1578       // The compiler elected, without comment, not to register a result.
1579       // Do not attempt further compilations of this method.
1580       ci_env.record_method_not_compilable("compile failed");
1581     }
1582 
1583     if (ci_env.failing()) {
1584       // Copy this bit to the enclosing block:
1585       compilable = ci_env.compilable();
1586       if (PrintCompilation) {
1587         const char* reason = ci_env.failure_reason();
1588         if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1589           if (is_highest_tier_compile(ci_env.comp_level())) {
1590             // Already at highest tier, promote to not compilable.
1591             compilable = ciEnv::MethodCompilable_never;
1592           } else {
1593             tty->print_cr("%3d   COMPILE SKIPPED: %s (retry at different tier)", compile_id, reason);
1594           }
1595         }
1596 
1597         if (compilable == ciEnv::MethodCompilable_never) {
1598           tty->print_cr("%3d   COMPILE SKIPPED: %s (not retryable)", compile_id, reason);
1599         } else if (compilable == ciEnv::MethodCompilable) {
1600           tty->print_cr("%3d   COMPILE SKIPPED: %s", compile_id, reason);
1601         }
1602       }
1603     } else {
1604       task->mark_success();
1605       task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1606     }
1607   }
1608   pop_jni_handle_block();
1609 
1610   methodHandle method(thread,
1611                       (methodOop)JNIHandles::resolve(task->method_handle()));
1612 
1613   DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success());
1614 
1615   collect_statistics(thread, time, task);
1616 
1617   if (compilable == ciEnv::MethodCompilable_never) {
1618     if (is_osr) {
1619       method->set_not_osr_compilable();
1620     } else {
1621       method->set_not_compilable_quietly();
1622     }
1623   } else if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1624     method->set_not_compilable_quietly(task->comp_level());
1625   }
1626 
1627   // Note that the queued_for_compilation bits are cleared without
1628   // protection of a mutex. [They were set by the requester thread,
1629   // when adding the task to the complie queue -- at which time the
1630   // compile queue lock was held. Subsequently, we acquired the compile
1631   // queue lock to get this task off the compile queue; thus (to belabour
1632   // the point somewhat) our clearing of the bits must be occurring
1633   // only after the setting of the bits. See also 14012000 above.
1634   method->clear_queued_for_compilation();
1635 
1636 #ifdef ASSERT
1637   if (CollectedHeap::fired_fake_oom()) {
1638     // The current compile received a fake OOM during compilation so
1639     // go ahead and exit the VM since the test apparently succeeded
1640     tty->print_cr("*** Shutting down VM after successful fake OOM");
1641     vm_exit(0);
1642   }
1643 #endif
1644 }
1645 
1646 
1647 // ------------------------------------------------------------------
1648 // CompileBroker::handle_full_code_cache
1649 //
1650 // The CodeCache is full.  Print out warning and disable compilation or
1651 // try code cache cleaning so compilation can continue later.
1652 void CompileBroker::handle_full_code_cache() {
1653   UseInterpreter = true;
1654   if (UseCompiler || AlwaysCompileLoopMethods ) {
1655     CompilerThread* thread = CompilerThread::current();
1656     CompileLog* log = thread->log();
1657     if (log != NULL) {
1658       log->begin_elem("code_cache_full");
1659       log->stamp();
1660       log->end_elem();
1661     }
1662     warning("CodeCache is full. Compiler has been disabled.");
1663     warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
1664 #ifndef PRODUCT
1665     if (CompileTheWorld || ExitOnFullCodeCache) {
1666       before_exit(JavaThread::current());
1667       exit_globals(); // will delete tty
1668       vm_direct_exit(CompileTheWorld ? 0 : 1);
1669     }
1670 #endif
1671     if (UseCodeCacheFlushing) {
1672       NMethodSweeper::handle_full_code_cache(true);
1673     } else {
1674       UseCompiler               = false;
1675       AlwaysCompileLoopMethods  = false;
1676     }
1677   }
1678 }
1679 
1680 // ------------------------------------------------------------------
1681 // CompileBroker::set_last_compile
1682 //
1683 // Record this compilation for debugging purposes.
1684 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1685   ResourceMark rm;
1686   char* method_name = method->name()->as_C_string();
1687   strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1688   char current_method[CompilerCounters::cmname_buffer_length];
1689   size_t maxLen = CompilerCounters::cmname_buffer_length;
1690 
1691   if (UsePerfData) {
1692     const char* class_name = method->method_holder()->klass_part()->name()->as_C_string();
1693 
1694     size_t s1len = strlen(class_name);
1695     size_t s2len = strlen(method_name);
1696 
1697     // check if we need to truncate the string
1698     if (s1len + s2len + 2 > maxLen) {
1699 
1700       // the strategy is to lop off the leading characters of the
1701       // class name and the trailing characters of the method name.
1702 
1703       if (s2len + 2 > maxLen) {
1704         // lop of the entire class name string, let snprintf handle
1705         // truncation of the method name.
1706         class_name += s1len; // null string
1707       }
1708       else {
1709         // lop off the extra characters from the front of the class name
1710         class_name += ((s1len + s2len + 2) - maxLen);
1711       }
1712     }
1713 
1714     jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1715   }
1716 
1717   if (CICountOSR && is_osr) {
1718     _last_compile_type = osr_compile;
1719   } else {
1720     _last_compile_type = normal_compile;
1721   }
1722   _last_compile_level = comp_level;
1723 
1724   if (UsePerfData) {
1725     CompilerCounters* counters = thread->counters();
1726     counters->set_current_method(current_method);
1727     counters->set_compile_type((jlong)_last_compile_type);
1728   }
1729 }
1730 
1731 
1732 // ------------------------------------------------------------------
1733 // CompileBroker::push_jni_handle_block
1734 //
1735 // Push on a new block of JNI handles.
1736 void CompileBroker::push_jni_handle_block() {
1737   JavaThread* thread = JavaThread::current();
1738 
1739   // Allocate a new block for JNI handles.
1740   // Inlined code from jni_PushLocalFrame()
1741   JNIHandleBlock* java_handles = thread->active_handles();
1742   JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
1743   assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
1744   compile_handles->set_pop_frame_link(java_handles);  // make sure java handles get gc'd.
1745   thread->set_active_handles(compile_handles);
1746 }
1747 
1748 
1749 // ------------------------------------------------------------------
1750 // CompileBroker::pop_jni_handle_block
1751 //
1752 // Pop off the current block of JNI handles.
1753 void CompileBroker::pop_jni_handle_block() {
1754   JavaThread* thread = JavaThread::current();
1755 
1756   // Release our JNI handle block
1757   JNIHandleBlock* compile_handles = thread->active_handles();
1758   JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
1759   thread->set_active_handles(java_handles);
1760   compile_handles->set_pop_frame_link(NULL);
1761   JNIHandleBlock::release_block(compile_handles, thread); // may block
1762 }
1763 
1764 
1765 // ------------------------------------------------------------------
1766 // CompileBroker::check_break_at
1767 //
1768 // Should the compilation break at the current compilation.
1769 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
1770   if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
1771     return true;
1772   } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
1773     return true;
1774   } else {
1775     return (compile_id == CIBreakAt);
1776   }
1777 }
1778 
1779 // ------------------------------------------------------------------
1780 // CompileBroker::collect_statistics
1781 //
1782 // Collect statistics about the compilation.
1783 
1784 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
1785   bool success = task->is_success();
1786   methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle()));
1787   uint compile_id = task->compile_id();
1788   bool is_osr = (task->osr_bci() != standard_entry_bci);
1789   nmethod* code = task->code();
1790   CompilerCounters* counters = thread->counters();
1791 
1792   assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
1793   MutexLocker locker(CompileStatistics_lock);
1794 
1795   // _perf variables are production performance counters which are
1796   // updated regardless of the setting of the CITime and CITimeEach flags
1797   //
1798   if (!success) {
1799     _total_bailout_count++;
1800     if (UsePerfData) {
1801       _perf_last_failed_method->set_value(counters->current_method());
1802       _perf_last_failed_type->set_value(counters->compile_type());
1803       _perf_total_bailout_count->inc();
1804     }
1805   } else if (code == NULL) {
1806     if (UsePerfData) {
1807       _perf_last_invalidated_method->set_value(counters->current_method());
1808       _perf_last_invalidated_type->set_value(counters->compile_type());
1809       _perf_total_invalidated_count->inc();
1810     }
1811     _total_invalidated_count++;
1812   } else {
1813     // Compilation succeeded
1814 
1815     // update compilation ticks - used by the implementation of
1816     // java.lang.management.CompilationMBean
1817     _perf_total_compilation->inc(time.ticks());
1818 
1819     if (CITime) {
1820       _t_total_compilation.add(time);
1821       if (is_osr) {
1822         _t_osr_compilation.add(time);
1823         _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
1824       } else {
1825         _t_standard_compilation.add(time);
1826         _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
1827       }
1828     }
1829 
1830     if (UsePerfData) {
1831       // save the name of the last method compiled
1832       _perf_last_method->set_value(counters->current_method());
1833       _perf_last_compile_type->set_value(counters->compile_type());
1834       _perf_last_compile_size->set_value(method->code_size() +
1835                                          task->num_inlined_bytecodes());
1836       if (is_osr) {
1837         _perf_osr_compilation->inc(time.ticks());
1838         _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
1839       } else {
1840         _perf_standard_compilation->inc(time.ticks());
1841         _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
1842       }
1843     }
1844 
1845     if (CITimeEach) {
1846       float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
1847       tty->print_cr("%3d   seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
1848                     compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
1849     }
1850 
1851     // Collect counts of successful compilations
1852     _sum_nmethod_size += code->total_size();
1853     _sum_nmethod_code_size += code->code_size();
1854     _total_compile_count++;
1855 
1856     if (UsePerfData) {
1857       _perf_sum_nmethod_size->inc(code->total_size());
1858       _perf_sum_nmethod_code_size->inc(code->code_size());
1859       _perf_total_compile_count->inc();
1860     }
1861 
1862     if (is_osr) {
1863       if (UsePerfData) _perf_total_osr_compile_count->inc();
1864       _total_osr_compile_count++;
1865     } else {
1866       if (UsePerfData) _perf_total_standard_compile_count->inc();
1867       _total_standard_compile_count++;
1868     }
1869   }
1870   // set the current method for the thread to null
1871   if (UsePerfData) counters->set_current_method("");
1872 }
1873 
1874 
1875 
1876 void CompileBroker::print_times() {
1877   tty->cr();
1878   tty->print_cr("Accumulated compiler times (for compiled methods only)");
1879   tty->print_cr("------------------------------------------------");
1880                //0000000000111111111122222222223333333333444444444455555555556666666666
1881                //0123456789012345678901234567890123456789012345678901234567890123456789
1882   tty->print_cr("  Total compilation time   : %6.3f s", CompileBroker::_t_total_compilation.seconds());
1883   tty->print_cr("    Standard compilation   : %6.3f s, Average : %2.3f",
1884                 CompileBroker::_t_standard_compilation.seconds(),
1885                 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
1886   tty->print_cr("    On stack replacement   : %6.3f s, Average : %2.3f", CompileBroker::_t_osr_compilation.seconds(), CompileBroker::_t_osr_compilation.seconds() / CompileBroker::_total_osr_compile_count);
1887 
1888   if (compiler(CompLevel_fast_compile)) {
1889     compiler(CompLevel_fast_compile)->print_timers();
1890     if (compiler(CompLevel_fast_compile) != compiler(CompLevel_highest_tier))
1891       compiler(CompLevel_highest_tier)->print_timers();
1892   }
1893 
1894   tty->cr();
1895   int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
1896   tty->print_cr("  Total compiled bytecodes : %6d bytes", tcb);
1897   tty->print_cr("    Standard compilation   : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
1898   tty->print_cr("    On stack replacement   : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
1899   int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
1900   tty->print_cr("  Average compilation speed: %6d bytes/s", bps);
1901   tty->cr();
1902   tty->print_cr("  nmethod code size        : %6d bytes", CompileBroker::_sum_nmethod_code_size);
1903   tty->print_cr("  nmethod total size       : %6d bytes", CompileBroker::_sum_nmethod_size);
1904 }
1905 
1906 
1907 // Debugging output for failure
1908 void CompileBroker::print_last_compile() {
1909   if ( _last_compile_level != CompLevel_none &&
1910        compiler(_last_compile_level) != NULL &&
1911        _last_method_compiled != NULL &&
1912        _last_compile_type != no_compile) {
1913     if (_last_compile_type == osr_compile) {
1914       tty->print_cr("Last parse:  [osr]%d+++(%d) %s",
1915                     _osr_compilation_id, _last_compile_level, _last_method_compiled);
1916     } else {
1917       tty->print_cr("Last parse:  %d+++(%d) %s",
1918                     _compilation_id, _last_compile_level, _last_method_compiled);
1919     }
1920   }
1921 }
1922 
1923 
1924 void CompileBroker::print_compiler_threads_on(outputStream* st) {
1925 #ifndef PRODUCT
1926   st->print_cr("Compiler thread printing unimplemented.");
1927   st->cr();
1928 #endif
1929 }