1 /*
   2  * Copyright 1999-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any 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   MutexLocker locker(lock());
 465   
 466   // Wait for an available CompileTask.
 467   while ((_first == NULL) || (!CompileBroker::should_compile_new_jobs())) {
 468     // There is no work to be done right now.  Wait.
 469     lock()->wait();
 470   }
 471 
 472   CompileTask* task = _first;
 473 
 474   // Update queue first and last
 475   _first =_first->next();
 476   if (_first == NULL) {
 477     _last = NULL;
 478   }
 479 
 480   return task;
 481 
 482 }
 483 
 484 
 485 // ------------------------------------------------------------------
 486 // CompileQueue::print
 487 void CompileQueue::print() {
 488   tty->print_cr("Contents of %s", name());
 489   tty->print_cr("----------------------");
 490   CompileTask* task = _first;
 491   while (task != NULL) {
 492     task->print_line();
 493     task = task->next();
 494   }
 495   tty->print_cr("----------------------");
 496 }
 497 
 498 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
 499 
 500   _current_method[0] = '\0';
 501   _compile_type = CompileBroker::no_compile;
 502 
 503   if (UsePerfData) {
 504     ResourceMark rm;
 505 
 506     // create the thread instance name space string - don't create an
 507     // instance subspace if instance is -1 - keeps the adapterThread
 508     // counters  from having a ".0" namespace.
 509     const char* thread_i = (instance == -1) ? thread_name :
 510                       PerfDataManager::name_space(thread_name, instance);
 511 
 512 
 513     char* name = PerfDataManager::counter_name(thread_i, "method");
 514     _perf_current_method =
 515                PerfDataManager::create_string_variable(SUN_CI, name,
 516                                                        cmname_buffer_length,
 517                                                        _current_method, CHECK);
 518 
 519     name = PerfDataManager::counter_name(thread_i, "type");
 520     _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
 521                                                           PerfData::U_None,
 522                                                          (jlong)_compile_type,
 523                                                           CHECK);
 524 
 525     name = PerfDataManager::counter_name(thread_i, "time");
 526     _perf_time = PerfDataManager::create_counter(SUN_CI, name,
 527                                                  PerfData::U_Ticks, CHECK);
 528 
 529     name = PerfDataManager::counter_name(thread_i, "compiles");
 530     _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
 531                                                      PerfData::U_Events, CHECK);
 532   }
 533 }
 534 
 535 
 536 // ------------------------------------------------------------------
 537 // CompileBroker::compilation_init
 538 //
 539 // Initialize the Compilation object
 540 void CompileBroker::compilation_init() {
 541   _last_method_compiled[0] = '\0';
 542 
 543   // Set the interface to the current compiler(s).
 544 #ifdef COMPILER1
 545   _compilers[0] = new Compiler();
 546 #ifndef COMPILER2
 547   _compilers[1] = _compilers[0];
 548 #endif
 549 #endif // COMPILER1
 550 
 551 #ifdef COMPILER2
 552   _compilers[1] = new C2Compiler();
 553 #ifndef COMPILER1
 554   _compilers[0] = _compilers[1];
 555 #endif
 556 #endif // COMPILER2
 557 
 558   // Initialize the CompileTask free list
 559   _task_free_list = NULL;
 560 
 561   // Start the CompilerThreads
 562   init_compiler_threads(compiler_count());
 563 
 564 
 565   // totalTime performance counter is always created as it is required
 566   // by the implementation of java.lang.management.CompilationMBean.
 567   {
 568     EXCEPTION_MARK;
 569     _perf_total_compilation =
 570                  PerfDataManager::create_counter(JAVA_CI, "totalTime",
 571                                                  PerfData::U_Ticks, CHECK);
 572   }
 573 
 574 
 575   if (UsePerfData) {
 576 
 577     EXCEPTION_MARK;
 578 
 579     // create the jvmstat performance counters
 580     _perf_osr_compilation =
 581                  PerfDataManager::create_counter(SUN_CI, "osrTime",
 582                                                  PerfData::U_Ticks, CHECK);
 583 
 584     _perf_standard_compilation =
 585                  PerfDataManager::create_counter(SUN_CI, "standardTime",
 586                                                  PerfData::U_Ticks, CHECK);
 587 
 588     _perf_total_bailout_count =
 589                  PerfDataManager::create_counter(SUN_CI, "totalBailouts",
 590                                                  PerfData::U_Events, CHECK);
 591 
 592     _perf_total_invalidated_count =
 593                  PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
 594                                                  PerfData::U_Events, CHECK);
 595 
 596     _perf_total_compile_count =
 597                  PerfDataManager::create_counter(SUN_CI, "totalCompiles",
 598                                                  PerfData::U_Events, CHECK);
 599     _perf_total_osr_compile_count =
 600                  PerfDataManager::create_counter(SUN_CI, "osrCompiles",
 601                                                  PerfData::U_Events, CHECK);
 602 
 603     _perf_total_standard_compile_count =
 604                  PerfDataManager::create_counter(SUN_CI, "standardCompiles",
 605                                                  PerfData::U_Events, CHECK);
 606 
 607     _perf_sum_osr_bytes_compiled =
 608                  PerfDataManager::create_counter(SUN_CI, "osrBytes",
 609                                                  PerfData::U_Bytes, CHECK);
 610 
 611     _perf_sum_standard_bytes_compiled =
 612                  PerfDataManager::create_counter(SUN_CI, "standardBytes",
 613                                                  PerfData::U_Bytes, CHECK);
 614 
 615     _perf_sum_nmethod_size =
 616                  PerfDataManager::create_counter(SUN_CI, "nmethodSize",
 617                                                  PerfData::U_Bytes, CHECK);
 618 
 619     _perf_sum_nmethod_code_size =
 620                  PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
 621                                                  PerfData::U_Bytes, CHECK);
 622 
 623     _perf_last_method =
 624                  PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
 625                                        CompilerCounters::cmname_buffer_length,
 626                                        "", CHECK);
 627 
 628     _perf_last_failed_method =
 629             PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
 630                                        CompilerCounters::cmname_buffer_length,
 631                                        "", CHECK);
 632 
 633     _perf_last_invalidated_method =
 634         PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
 635                                      CompilerCounters::cmname_buffer_length,
 636                                      "", CHECK);
 637 
 638     _perf_last_compile_type =
 639              PerfDataManager::create_variable(SUN_CI, "lastType",
 640                                               PerfData::U_None,
 641                                               (jlong)CompileBroker::no_compile,
 642                                               CHECK);
 643 
 644     _perf_last_compile_size =
 645              PerfDataManager::create_variable(SUN_CI, "lastSize",
 646                                               PerfData::U_Bytes,
 647                                               (jlong)CompileBroker::no_compile,
 648                                               CHECK);
 649 
 650 
 651     _perf_last_failed_type =
 652              PerfDataManager::create_variable(SUN_CI, "lastFailedType",
 653                                               PerfData::U_None,
 654                                               (jlong)CompileBroker::no_compile,
 655                                               CHECK);
 656 
 657     _perf_last_invalidated_type =
 658          PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
 659                                           PerfData::U_None,
 660                                           (jlong)CompileBroker::no_compile,
 661                                           CHECK);
 662   }
 663 
 664   _initialized = true;
 665 }
 666 
 667 
 668 
 669 // ------------------------------------------------------------------
 670 // CompileBroker::make_compiler_thread
 671 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
 672   CompilerThread* compiler_thread = NULL;
 673 
 674   klassOop k =
 675     SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_Thread(),
 676                                       true, CHECK_0);
 677   instanceKlassHandle klass (THREAD, k);
 678   instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
 679   Handle string = java_lang_String::create_from_str(name, CHECK_0);
 680 
 681   // Initialize thread_oop to put it into the system threadGroup
 682   Handle thread_group (THREAD,  Universe::system_thread_group());
 683   JavaValue result(T_VOID);
 684   JavaCalls::call_special(&result, thread_oop,
 685                        klass,
 686                        vmSymbolHandles::object_initializer_name(),
 687                        vmSymbolHandles::threadgroup_string_void_signature(),
 688                        thread_group,
 689                        string,
 690                        CHECK_0);
 691 
 692   {
 693     MutexLocker mu(Threads_lock, THREAD);
 694     compiler_thread = new CompilerThread(queue, counters);
 695     // At this point the new CompilerThread data-races with this startup
 696     // thread (which I believe is the primoridal thread and NOT the VM
 697     // thread).  This means Java bytecodes being executed at startup can
 698     // queue compile jobs which will run at whatever default priority the
 699     // newly created CompilerThread runs at.
 700 
 701 
 702     // At this point it may be possible that no osthread was created for the
 703     // JavaThread due to lack of memory. We would have to throw an exception
 704     // in that case. However, since this must work and we do not allow
 705     // exceptions anyway, check and abort if this fails.
 706 
 707     if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
 708       vm_exit_during_initialization("java.lang.OutOfMemoryError",
 709                                     "unable to create new native thread");
 710     }
 711 
 712     java_lang_Thread::set_thread(thread_oop(), compiler_thread);
 713 
 714     // Note that this only sets the JavaThread _priority field, which by
 715     // definition is limited to Java priorities and not OS priorities.
 716     // The os-priority is set in the CompilerThread startup code itself
 717     java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
 718     // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler
 719     // threads never have their OS priority set.  The assumption here is to
 720     // enable the Performance group to do flag tuning, figure out a suitable
 721     // CompilerThreadPriority, and then remove this 'if' statement (and
 722     // comment) and unconditionally set the priority.
 723 
 724     // Compiler Threads should be at the highest Priority
 725     if ( CompilerThreadPriority != -1 )
 726       os::set_native_priority( compiler_thread, CompilerThreadPriority );
 727     else
 728       os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]);
 729 
 730       // Note that I cannot call os::set_priority because it expects Java
 731       // priorities and I am *explicitly* using OS priorities so that it's
 732       // possible to set the compiler thread priority higher than any Java
 733       // thread.
 734 
 735     java_lang_Thread::set_daemon(thread_oop());
 736 
 737     compiler_thread->set_threadObj(thread_oop());
 738     Threads::add(compiler_thread);
 739     Thread::start(compiler_thread);
 740   }
 741   // Let go of Threads_lock before yielding
 742   os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
 743 
 744   return compiler_thread;
 745 }
 746 
 747 
 748 // ------------------------------------------------------------------
 749 // CompileBroker::init_compiler_threads
 750 //
 751 // Initialize the compilation queue
 752 void CompileBroker::init_compiler_threads(int compiler_count) {
 753   EXCEPTION_MARK;
 754 
 755   _method_queue  = new CompileQueue("MethodQueue",  MethodCompileQueue_lock);
 756   _method_threads =
 757     new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true);
 758 
 759   char name_buffer[256];
 760   int i;
 761   for (i = 0; i < compiler_count; i++) {
 762     // Create a name for our thread.
 763     sprintf(name_buffer, "CompilerThread%d", i);
 764     CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
 765 
 766     CompilerThread* new_thread = make_compiler_thread(name_buffer, _method_queue, counters, CHECK);
 767     _method_threads->append(new_thread);
 768   }
 769   if (UsePerfData) {
 770     PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
 771                                      compiler_count, CHECK);
 772   }
 773 }
 774 
 775 // ------------------------------------------------------------------
 776 // CompileBroker::is_idle
 777 bool CompileBroker::is_idle() {
 778   if (!_method_queue->is_empty()) {
 779     return false;
 780   } else {
 781     int num_threads = _method_threads->length();
 782     for (int i=0; i<num_threads; i++) {
 783       if (_method_threads->at(i)->task() != NULL) {
 784         return false;
 785       }
 786     }
 787 
 788     // No pending or active compilations.
 789     return true;
 790   }
 791 }
 792 
 793 
 794 // ------------------------------------------------------------------
 795 // CompileBroker::compile_method
 796 //
 797 // Request compilation of a method.
 798 void CompileBroker::compile_method_base(methodHandle method,
 799                                         int osr_bci,
 800                                         int comp_level,
 801                                         methodHandle hot_method,
 802                                         int hot_count,
 803                                         const char* comment,
 804                                         TRAPS) {
 805   // do nothing if compiler thread(s) is not available
 806   if (!_initialized ) {
 807     return;
 808   }
 809 
 810   guarantee(!method->is_abstract(), "cannot compile abstract methods");
 811   assert(method->method_holder()->klass_part()->oop_is_instance(),
 812          "sanity check");
 813   assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(),
 814          "method holder must be initialized");
 815 
 816   if (CIPrintRequests) {
 817     tty->print("request: ");
 818     method->print_short_name(tty);
 819     if (osr_bci != InvocationEntryBci) {
 820       tty->print(" osr_bci: %d", osr_bci);
 821     }
 822     tty->print(" comment: %s count: %d", comment, hot_count);
 823     if (!hot_method.is_null()) {
 824       tty->print(" hot: ");
 825       if (hot_method() != method()) {
 826           hot_method->print_short_name(tty);
 827       } else {
 828         tty->print("yes");
 829       }
 830     }
 831     tty->cr();
 832   }
 833 
 834   // A request has been made for compilation.  Before we do any
 835   // real work, check to see if the method has been compiled
 836   // in the meantime with a definitive result.
 837   if (compilation_is_complete(method, osr_bci, comp_level)) {
 838     return;
 839   }
 840 
 841   // If this method is already in the compile queue, then
 842   // we do not block the current thread.
 843   if (compilation_is_in_queue(method, osr_bci)) {
 844     // We may want to decay our counter a bit here to prevent
 845     // multiple denied requests for compilation.  This is an
 846     // open compilation policy issue. Note: The other possibility,
 847     // in the case that this is a blocking compile request, is to have
 848     // all subsequent blocking requesters wait for completion of
 849     // ongoing compiles. Note that in this case we'll need a protocol
 850     // for freeing the associated compile tasks. [Or we could have
 851     // a single static monitor on which all these waiters sleep.]
 852     return;
 853   }
 854 
 855   // Outputs from the following MutexLocker block:
 856   CompileTask* task     = NULL;
 857   bool         blocking = false;
 858 
 859   // Acquire our lock.
 860   {
 861     MutexLocker locker(_method_queue->lock(), THREAD);
 862 
 863     // Make sure the method has not slipped into the queues since
 864     // last we checked; note that those checks were "fast bail-outs".
 865     // Here we need to be more careful, see 14012000 below.
 866     if (compilation_is_in_queue(method, osr_bci)) {
 867       return;
 868     }
 869 
 870     // We need to check again to see if the compilation has
 871     // completed.  A previous compilation may have registered
 872     // some result.
 873     if (compilation_is_complete(method, osr_bci, comp_level)) {
 874       return;
 875     }
 876 
 877     // We now know that this compilation is not pending, complete,
 878     // or prohibited.  Assign a compile_id to this compilation
 879     // and check to see if it is in our [Start..Stop) range.
 880     uint compile_id = assign_compile_id(method, osr_bci);
 881     if (compile_id == 0) {
 882       // The compilation falls outside the allowed range.
 883       return;
 884     }
 885 
 886     // Should this thread wait for completion of the compile?
 887     blocking = is_compile_blocking(method, osr_bci);
 888 
 889     // We will enter the compilation in the queue.
 890     // 14012000: Note that this sets the queued_for_compile bits in
 891     // the target method. We can now reason that a method cannot be
 892     // queued for compilation more than once, as follows:
 893     // Before a thread queues a task for compilation, it first acquires
 894     // the compile queue lock, then checks if the method's queued bits
 895     // are set or it has already been compiled. Thus there can not be two
 896     // instances of a compilation task for the same method on the
 897     // compilation queue. Consider now the case where the compilation
 898     // thread has already removed a task for that method from the queue
 899     // and is in the midst of compiling it. In this case, the
 900     // queued_for_compile bits must be set in the method (and these
 901     // will be visible to the current thread, since the bits were set
 902     // under protection of the compile queue lock, which we hold now.
 903     // When the compilation completes, the compiler thread first sets
 904     // the compilation result and then clears the queued_for_compile
 905     // bits. Neither of these actions are protected by a barrier (or done
 906     // under the protection of a lock), so the only guarantee we have
 907     // (on machines with TSO (Total Store Order)) is that these values
 908     // will update in that order. As a result, the only combinations of
 909     // these bits that the current thread will see are, in temporal order:
 910     // <RESULT, QUEUE> :
 911     //     <0, 1> : in compile queue, but not yet compiled
 912     //     <1, 1> : compiled but queue bit not cleared
 913     //     <1, 0> : compiled and queue bit cleared
 914     // Because we first check the queue bits then check the result bits,
 915     // we are assured that we cannot introduce a duplicate task.
 916     // Note that if we did the tests in the reverse order (i.e. check
 917     // result then check queued bit), we could get the result bit before
 918     // the compilation completed, and the queue bit after the compilation
 919     // completed, and end up introducing a "duplicate" (redundant) task.
 920     // In that case, the compiler thread should first check if a method
 921     // has already been compiled before trying to compile it.
 922     // NOTE: in the event that there are multiple compiler threads and
 923     // there is de-optimization/recompilation, things will get hairy,
 924     // and in that case it's best to protect both the testing (here) of
 925     // these bits, and their updating (here and elsewhere) under a
 926     // common lock.
 927     task = create_compile_task(_method_queue,
 928                                compile_id, method,
 929                                osr_bci, comp_level,
 930                                hot_method, hot_count, comment,
 931                                blocking);
 932   }
 933 
 934   if (blocking) {
 935     wait_for_completion(task);
 936   }
 937 }
 938 
 939 
 940 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
 941                                        methodHandle hot_method, int hot_count,
 942                                        const char* comment, TRAPS) {
 943   // make sure arguments make sense
 944   assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method");
 945   assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
 946   assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
 947   assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized");
 948 
 949   int comp_level = CompilationPolicy::policy()->compilation_level(method, osr_bci);
 950 
 951 #ifdef TIERED
 952   if (TieredCompilation && StressTieredRuntime) {
 953     static int flipper = 0;
 954     if (is_even(flipper++)) {
 955       comp_level = CompLevel_fast_compile;
 956     } else {
 957       comp_level = CompLevel_full_optimization;
 958     }
 959   }
 960 #ifdef SPARC
 961   // QQQ FIX ME
 962   // C2 only returns long results in G1 and c1 doesn't understand so disallow c2
 963   // compiles of long results
 964   if (TieredCompilation && method()->result_type() == T_LONG) {
 965     comp_level = CompLevel_fast_compile;
 966   }
 967 #endif // SPARC
 968 #endif // TIERED
 969 
 970   // return quickly if possible
 971 
 972   // lock, make sure that the compilation
 973   // isn't prohibited in a straightforward way.
 974 
 975   if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) {
 976     return NULL;
 977   }
 978 
 979   if (osr_bci == InvocationEntryBci) {
 980     // standard compilation
 981     nmethod* method_code = method->code();
 982     if (method_code != NULL
 983 #ifdef TIERED
 984        && ( method_code->is_compiled_by_c2() || comp_level == CompLevel_fast_compile )
 985 #endif // TIERED
 986       ) {
 987       return method_code;
 988     }
 989     if (method->is_not_compilable(comp_level)) return NULL;
 990   } else {
 991     // osr compilation
 992 #ifndef TIERED
 993     // seems like an assert of dubious value
 994     assert(comp_level == CompLevel_full_optimization,
 995            "all OSR compiles are assumed to be at a single compilation lavel");
 996 #endif // TIERED
 997     nmethod* nm = method->lookup_osr_nmethod_for(osr_bci);
 998     if (nm != NULL) return nm;
 999     if (method->is_not_osr_compilable()) return NULL;
1000   }
1001 
1002   assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1003   // some prerequisites that are compiler specific
1004   if (compiler(comp_level)->is_c2()) {
1005     method->constants()->resolve_string_constants(CHECK_0);
1006     // Resolve all classes seen in the signature of the method
1007     // we are compiling.
1008     methodOopDesc::load_signature_classes(method, CHECK_0);
1009   }
1010 
1011   // If the method is native, do the lookup in the thread requesting
1012   // the compilation. Native lookups can load code, which is not
1013   // permitted during compilation.
1014   //
1015   // Note: A native method implies non-osr compilation which is
1016   //       checked with an assertion at the entry of this method.
1017   if (method->is_native()) {
1018     bool in_base_library;
1019     address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1020     if (HAS_PENDING_EXCEPTION) {
1021       // In case of an exception looking up the method, we just forget
1022       // about it. The interpreter will kick-in and throw the exception.
1023       method->set_not_compilable(); // implies is_not_osr_compilable()
1024       CLEAR_PENDING_EXCEPTION;
1025       return NULL;
1026     }
1027     assert(method->has_native_function(), "must have native code by now");
1028   }
1029 
1030   // RedefineClasses() has replaced this method; just return
1031   if (method->is_old()) {
1032     return NULL;
1033   }
1034 
1035   // JVMTI -- post_compile_event requires jmethod_id() that may require
1036   // a lock the compiling thread can not acquire. Prefetch it here.
1037   if (JvmtiExport::should_post_compiled_method_load()) {
1038     method->jmethod_id();
1039   }
1040 
1041   // do the compilation
1042   if (method->is_native()) {
1043     if (!PreferInterpreterNativeStubs) {
1044       (void) AdapterHandlerLibrary::create_native_wrapper(method);
1045     } else {
1046       return NULL;
1047     }
1048   } else {
1049     compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, CHECK_0);
1050   }
1051 
1052   // return requested nmethod
1053   return osr_bci  == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci);
1054 }
1055 
1056 
1057 // ------------------------------------------------------------------
1058 // CompileBroker::compilation_is_complete
1059 //
1060 // See if compilation of this method is already complete.
1061 bool CompileBroker::compilation_is_complete(methodHandle method,
1062                                             int          osr_bci,
1063                                             int          comp_level) {
1064   bool is_osr = (osr_bci != standard_entry_bci);
1065   if (is_osr) {
1066     if (method->is_not_osr_compilable()) {
1067       return true;
1068     } else {
1069       nmethod* result = method->lookup_osr_nmethod_for(osr_bci);
1070       return (result != NULL);
1071     }
1072   } else {
1073     if (method->is_not_compilable(comp_level)) {
1074       return true;
1075     } else {
1076       nmethod* result = method->code();
1077       if (result == NULL) return false;
1078 #ifdef TIERED
1079       if (comp_level == CompLevel_fast_compile) {
1080         // At worst the code is from c1
1081         return true;
1082       }
1083       // comp level must be full opt
1084       return result->is_compiled_by_c2();
1085 #endif // TIERED
1086       return true;
1087     }
1088   }
1089 }
1090 
1091 
1092 // ------------------------------------------------------------------
1093 // CompileBroker::compilation_is_in_queue
1094 //
1095 // See if this compilation is already requested.
1096 //
1097 // Implementation note: there is only a single "is in queue" bit
1098 // for each method.  This means that the check below is overly
1099 // conservative in the sense that an osr compilation in the queue
1100 // will block a normal compilation from entering the queue (and vice
1101 // versa).  This can be remedied by a full queue search to disambiguate
1102 // cases.  If it is deemed profitible, this may be done.
1103 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1104                                           int          osr_bci) {
1105   return method->queued_for_compilation();
1106 }
1107 
1108 
1109 // ------------------------------------------------------------------
1110 // CompileBroker::compilation_is_prohibited
1111 //
1112 // See if this compilation is not allowed.
1113 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1114   bool is_native = method->is_native();
1115   // Some compilers may not support the compilation of natives.
1116   // QQQ this needs some work ought to only record not compilable at
1117   // the specified level
1118   if (is_native &&
1119       (!CICompileNatives || !compiler(comp_level)->supports_native())) {
1120     method->set_not_compilable();
1121     return true;
1122   }
1123 
1124   bool is_osr = (osr_bci != standard_entry_bci);
1125   // Some compilers may not support on stack replacement.
1126   if (is_osr &&
1127       (!CICompileOSR || !compiler(comp_level)->supports_osr())) {
1128     method->set_not_osr_compilable();
1129     return true;
1130   }
1131 
1132   // The method may be explicitly excluded by the user.
1133   bool quietly;
1134   if (CompilerOracle::should_exclude(method, quietly)) {
1135     if (!quietly) {
1136       // This does not happen quietly...
1137       ResourceMark rm;
1138       tty->print("### Excluding %s:%s",
1139                  method->is_native() ? "generation of native wrapper" : "compile",
1140                  (method->is_static() ? " static" : ""));
1141       method->print_short_name(tty);
1142       tty->cr();
1143     }
1144     method->set_not_compilable();
1145   }
1146 
1147   return false;
1148 }
1149 
1150 
1151 // ------------------------------------------------------------------
1152 // CompileBroker::assign_compile_id
1153 //
1154 // Assign a serialized id number to this compilation request.  If the
1155 // number falls out of the allowed range, return a 0.  OSR
1156 // compilations may be numbered separately from regular compilations
1157 // if certain debugging flags are used.
1158 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1159   assert(_method_queue->lock()->owner() == JavaThread::current(),
1160          "must hold the compilation queue lock");
1161   bool is_osr = (osr_bci != standard_entry_bci);
1162   assert(!method->is_native(), "no longer compile natives");
1163   uint id;
1164   if (CICountOSR && is_osr) {
1165     id = ++_osr_compilation_id;
1166     if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1167       return id;
1168     }
1169   } else {
1170     id = ++_compilation_id;
1171     if ((uint)CIStart <= id && id < (uint)CIStop) {
1172       return id;
1173     }
1174   }
1175 
1176   // Method was not in the appropriate compilation range.
1177   method->set_not_compilable();
1178   return 0;
1179 }
1180 
1181 
1182 // ------------------------------------------------------------------
1183 // CompileBroker::is_compile_blocking
1184 //
1185 // Should the current thread be blocked until this compilation request
1186 // has been fulfilled?
1187 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1188   return !BackgroundCompilation;
1189 }
1190 
1191 
1192 // ------------------------------------------------------------------
1193 // CompileBroker::preload_classes
1194 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1195   // Move this code over from c1_Compiler.cpp
1196   ShouldNotReachHere();
1197 }
1198 
1199 
1200 // ------------------------------------------------------------------
1201 // CompileBroker::create_compile_task
1202 //
1203 // Create a CompileTask object representing the current request for
1204 // compilation.  Add this task to the queue.
1205 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1206                                               int           compile_id,
1207                                               methodHandle  method,
1208                                               int           osr_bci,
1209                                               int           comp_level,
1210                                               methodHandle  hot_method,
1211                                               int           hot_count,
1212                                               const char*   comment,
1213                                               bool          blocking) {
1214   CompileTask* new_task = allocate_task();
1215   new_task->initialize(compile_id, method, osr_bci, comp_level,
1216                        hot_method, hot_count, comment,
1217                        blocking);
1218   queue->add(new_task);
1219   return new_task;
1220 }
1221 
1222 
1223 // ------------------------------------------------------------------
1224 // CompileBroker::allocate_task
1225 //
1226 // Allocate a CompileTask, from the free list if possible.
1227 CompileTask* CompileBroker::allocate_task() {
1228   MutexLocker locker(CompileTaskAlloc_lock);
1229   CompileTask* task = NULL;
1230   if (_task_free_list != NULL) {
1231     task = _task_free_list;
1232     _task_free_list = task->next();
1233     task->set_next(NULL);
1234   } else {
1235     task = new CompileTask();
1236     task->set_next(NULL);
1237   }
1238   return task;
1239 }
1240 
1241 
1242 // ------------------------------------------------------------------
1243 // CompileBroker::free_task
1244 //
1245 // Add a task to the free list.
1246 void CompileBroker::free_task(CompileTask* task) {
1247   MutexLocker locker(CompileTaskAlloc_lock);
1248   task->free();
1249   task->set_next(_task_free_list);
1250   _task_free_list = task;
1251 }
1252 
1253 
1254 // ------------------------------------------------------------------
1255 // CompileBroker::wait_for_completion
1256 //
1257 // Wait for the given method CompileTask to complete.
1258 void CompileBroker::wait_for_completion(CompileTask* task) {
1259   if (CIPrintCompileQueue) {
1260     tty->print_cr("BLOCKING FOR COMPILE");
1261   }
1262 
1263   assert(task->is_blocking(), "can only wait on blocking task");
1264 
1265   JavaThread *thread = JavaThread::current();
1266   thread->set_blocked_on_compilation(true);
1267 
1268   methodHandle method(thread,
1269                       (methodOop)JNIHandles::resolve(task->method_handle()));
1270   {
1271     MutexLocker waiter(task->lock(), thread);
1272 
1273     while (!task->is_complete())
1274       task->lock()->wait();
1275   }
1276   // It is harmless to check this status without the lock, because
1277   // completion is a stable property (until the task object is recycled).
1278   assert(task->is_complete(), "Compilation should have completed");
1279   assert(task->code_handle() == NULL, "must be reset");
1280 
1281   thread->set_blocked_on_compilation(false);
1282 
1283   // By convention, the waiter is responsible for recycling a
1284   // blocking CompileTask. Since there is only one waiter ever
1285   // waiting on a CompileTask, we know that no one else will
1286   // be using this CompileTask; we can free it.
1287   free_task(task);
1288 }
1289 
1290 // ------------------------------------------------------------------
1291 // CompileBroker::compiler_thread_loop
1292 //
1293 // The main loop run by a CompilerThread.
1294 void CompileBroker::compiler_thread_loop() {
1295   CompilerThread* thread = CompilerThread::current();
1296   CompileQueue* queue = thread->queue();
1297 
1298   // For the thread that initializes the ciObjectFactory
1299   // this resource mark holds all the shared objects
1300   ResourceMark rm;
1301 
1302   // First thread to get here will initialize the compiler interface
1303 
1304   if (!ciObjectFactory::is_initialized()) {
1305     ASSERT_IN_VM;
1306     MutexLocker only_one (CompileThread_lock, thread);
1307     if (!ciObjectFactory::is_initialized()) {
1308       ciObjectFactory::initialize();
1309     }
1310   }
1311 
1312   // Open a log.
1313   if (LogCompilation) {
1314     init_compiler_thread_log();
1315   }
1316   CompileLog* log = thread->log();
1317   if (log != NULL) {
1318     log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'",
1319                     os::current_thread_id(),
1320                     os::current_process_id());
1321     log->stamp();
1322     log->end_elem();
1323   }
1324 
1325   while (true) {
1326     {
1327       // We need this HandleMark to avoid leaking VM handles.
1328       HandleMark hm(thread);
1329      
1330       if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) {
1331         // the code cache is really full
1332         handle_full_code_cache();      
1333       } else if (UseCodeCacheFlushing && (CodeCache::unallocated_capacity() < CodeCacheFlushingMinimumFreeSpace)) {
1334         // Attempt to start cleaning the code cache while there is still a little headroom
1335         NMethodSweeper::handle_full_code_cache(false);      
1336       } 
1337 
1338       CompileTask* task = queue->get();
1339 
1340       // Give compiler threads an extra quanta.  They tend to be bursty and
1341       // this helps the compiler to finish up the job.
1342       if( CompilerThreadHintNoPreempt )
1343         os::hint_no_preempt();
1344 
1345       // trace per thread time and compile statistics
1346       CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1347       PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1348 
1349       // Assign the task to the current thread.  Mark this compilation
1350       // thread as active for the profiler.
1351       CompileTaskWrapper ctw(task);
1352       nmethodLocker result_handle;  // (handle for the nmethod produced by this task)
1353       task->set_code_handle(&result_handle);
1354       methodHandle method(thread,
1355                      (methodOop)JNIHandles::resolve(task->method_handle()));
1356 
1357       // Never compile a method if breakpoints are present in it
1358       if (method()->number_of_breakpoints() == 0) {
1359         // Compile the method.
1360         if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1361 #ifdef COMPILER1
1362           // Allow repeating compilations for the purpose of benchmarking
1363           // compile speed. This is not useful for customers.
1364           if (CompilationRepeat != 0) {
1365             int compile_count = CompilationRepeat;
1366             while (compile_count > 0) {
1367               invoke_compiler_on_method(task);
1368               nmethod* nm = method->code();
1369               if (nm != NULL) {
1370                 nm->make_zombie();
1371                 method->clear_code();
1372               }
1373               compile_count--;
1374             }
1375           }
1376 #endif /* COMPILER1 */
1377           invoke_compiler_on_method(task);
1378         } else {
1379           // After compilation is disabled, remove remaining methods from queue
1380           method->clear_queued_for_compilation();
1381         }
1382       }
1383     }
1384   }
1385 }
1386 
1387 
1388 // ------------------------------------------------------------------
1389 // CompileBroker::init_compiler_thread_log
1390 //
1391 // Set up state required by +LogCompilation.
1392 void CompileBroker::init_compiler_thread_log() {
1393     CompilerThread* thread = CompilerThread::current();
1394     char  fileBuf[4*K];
1395     FILE* fp = NULL;
1396     char* file = NULL;
1397     intx thread_id = os::current_thread_id();
1398     for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1399       const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1400       if (dir == NULL)  dir = "";
1401       sprintf(fileBuf, "%shs_c" UINTX_FORMAT "_pid%u.log",
1402               dir, thread_id, os::current_process_id());
1403       fp = fopen(fileBuf, "at");
1404       if (fp != NULL) {
1405         file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1);
1406         strcpy(file, fileBuf);
1407         break;
1408       }
1409     }
1410     if (fp == NULL) {
1411       warning("Cannot open log file: %s", fileBuf);
1412     } else {
1413       if (LogCompilation && Verbose)
1414         tty->print_cr("Opening compilation log %s", file);
1415       CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id);
1416       thread->init_log(log);
1417 
1418       if (xtty != NULL) {
1419         ttyLocker ttyl;
1420 
1421         // Record any per thread log files
1422         xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file);
1423       }
1424     }
1425 }
1426 
1427 // ------------------------------------------------------------------
1428 // CompileBroker::set_should_block
1429 //
1430 // Set _should_block.
1431 // Call this from the VM, with Threads_lock held and a safepoint requested.
1432 void CompileBroker::set_should_block() {
1433   assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1434   assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1435 #ifndef PRODUCT
1436   if (PrintCompilation && (Verbose || WizardMode))
1437     tty->print_cr("notifying compiler thread pool to block");
1438 #endif
1439   _should_block = true;
1440 }
1441 
1442 // ------------------------------------------------------------------
1443 // CompileBroker::maybe_block
1444 //
1445 // Call this from the compiler at convenient points, to poll for _should_block.
1446 void CompileBroker::maybe_block() {
1447   if (_should_block) {
1448 #ifndef PRODUCT
1449     if (PrintCompilation && (Verbose || WizardMode))
1450       tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1451 #endif
1452     ThreadInVMfromNative tivfn(JavaThread::current());
1453   }
1454 }
1455 
1456 
1457 // ------------------------------------------------------------------
1458 // CompileBroker::invoke_compiler_on_method
1459 //
1460 // Compile a method.
1461 //
1462 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1463   if (PrintCompilation) {
1464     ResourceMark rm;
1465     task->print_line();
1466   }
1467   elapsedTimer time;
1468 
1469   CompilerThread* thread = CompilerThread::current();
1470   ResourceMark rm(thread);
1471 
1472   // Common flags.
1473   uint compile_id = task->compile_id();
1474   int osr_bci = task->osr_bci();
1475   bool is_osr = (osr_bci != standard_entry_bci);
1476   bool should_log = (thread->log() != NULL);
1477   bool should_break = false;
1478   {
1479     // create the handle inside it's own block so it can't
1480     // accidentally be referenced once the thread transitions to
1481     // native.  The NoHandleMark before the transition should catch
1482     // any cases where this occurs in the future.
1483     methodHandle method(thread,
1484                         (methodOop)JNIHandles::resolve(task->method_handle()));
1485     should_break = check_break_at(method, compile_id, is_osr);
1486     if (should_log && !CompilerOracle::should_log(method)) {
1487       should_log = false;
1488     }
1489     assert(!method->is_native(), "no longer compile natives");
1490 
1491     // Save information about this method in case of failure.
1492     set_last_compile(thread, method, is_osr, task->comp_level());
1493 
1494     DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method);
1495   }
1496 
1497   // Allocate a new set of JNI handles.
1498   push_jni_handle_block();
1499   jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle()));
1500   int compilable = ciEnv::MethodCompilable;
1501   {
1502     int system_dictionary_modification_counter;
1503     {
1504       MutexLocker locker(Compile_lock, thread);
1505       system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1506     }
1507 
1508     NoHandleMark  nhm;
1509     ThreadToNativeFromVM ttn(thread);
1510 
1511     ciEnv ci_env(task, system_dictionary_modification_counter);
1512     if (should_break) {
1513       ci_env.set_break_at_compile(true);
1514     }
1515     if (should_log) {
1516       ci_env.set_log(thread->log());
1517     }
1518     assert(thread->env() == &ci_env, "set by ci_env");
1519     // The thread-env() field is cleared in ~CompileTaskWrapper.
1520 
1521     // Cache Jvmti state
1522     ci_env.cache_jvmti_state();
1523 
1524     // Cache DTrace flags
1525     ci_env.cache_dtrace_flags();
1526 
1527     ciMethod* target = ci_env.get_method_from_handle(target_handle);
1528 
1529     TraceTime t1("compilation", &time);
1530 
1531     compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci);
1532 
1533     if (!ci_env.failing() && task->code() == NULL) {
1534       //assert(false, "compiler should always document failure");
1535       // The compiler elected, without comment, not to register a result.
1536       // Do not attempt further compilations of this method.
1537       ci_env.record_method_not_compilable("compile failed");
1538     }
1539 
1540     if (ci_env.failing()) {
1541       // Copy this bit to the enclosing block:
1542       compilable = ci_env.compilable();
1543       if (PrintCompilation) {
1544         const char* reason = ci_env.failure_reason();
1545         if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1546           if (is_highest_tier_compile(ci_env.comp_level())) {
1547             // Already at highest tier, promote to not compilable.
1548             compilable = ciEnv::MethodCompilable_never;
1549           } else {
1550             tty->print_cr("%3d   COMPILE SKIPPED: %s (retry at different tier)", compile_id, reason);
1551           }
1552         }
1553 
1554         if (compilable == ciEnv::MethodCompilable_never) {
1555           tty->print_cr("%3d   COMPILE SKIPPED: %s (not retryable)", compile_id, reason);
1556         } else if (compilable == ciEnv::MethodCompilable) {
1557           tty->print_cr("%3d   COMPILE SKIPPED: %s", compile_id, reason);
1558         }
1559       }
1560     } else {
1561       task->mark_success();
1562       task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1563     }
1564   }
1565   pop_jni_handle_block();
1566 
1567   methodHandle method(thread,
1568                       (methodOop)JNIHandles::resolve(task->method_handle()));
1569 
1570   DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success());
1571 
1572   collect_statistics(thread, time, task);
1573 
1574   if (compilable == ciEnv::MethodCompilable_never) {
1575     if (is_osr) {
1576       method->set_not_osr_compilable();
1577     } else {
1578       method->set_not_compilable();
1579     }
1580   } else if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1581     method->set_not_compilable(task->comp_level());
1582   }
1583 
1584   // Note that the queued_for_compilation bits are cleared without
1585   // protection of a mutex. [They were set by the requester thread,
1586   // when adding the task to the complie queue -- at which time the
1587   // compile queue lock was held. Subsequently, we acquired the compile
1588   // queue lock to get this task off the compile queue; thus (to belabour
1589   // the point somewhat) our clearing of the bits must be occurring
1590   // only after the setting of the bits. See also 14012000 above.
1591   method->clear_queued_for_compilation();
1592 
1593 #ifdef ASSERT
1594   if (CollectedHeap::fired_fake_oom()) {
1595     // The current compile received a fake OOM during compilation so
1596     // go ahead and exit the VM since the test apparently succeeded
1597     tty->print_cr("*** Shutting down VM after successful fake OOM");
1598     vm_exit(0);
1599   }
1600 #endif
1601 }
1602 
1603 
1604 // ------------------------------------------------------------------
1605 // CompileBroker::handle_full_code_cache
1606 //
1607 // The CodeCache is full.  Print out warning and disable compilation or
1608 // try code cache cleaning so compilation can continue later.
1609 void CompileBroker::handle_full_code_cache() {
1610   UseInterpreter = true;
1611   if (UseCompiler || AlwaysCompileLoopMethods ) {
1612   #ifndef PRODUCT
1613     warning("CodeCache is full. Compiler has been disabled");    
1614     if (CompileTheWorld || ExitOnFullCodeCache) {
1615       before_exit(JavaThread::current());
1616       exit_globals(); // will delete tty
1617       vm_direct_exit(CompileTheWorld ? 0 : 1);
1618     }
1619   #endif
1620     if (UseCodeCacheFlushing) {
1621       NMethodSweeper::handle_full_code_cache(true);
1622     } else {
1623       UseCompiler               = false;
1624       AlwaysCompileLoopMethods  = false;
1625     }
1626   }
1627 }
1628 
1629 // ------------------------------------------------------------------
1630 // CompileBroker::set_last_compile
1631 //
1632 // Record this compilation for debugging purposes.
1633 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1634   ResourceMark rm;
1635   char* method_name = method->name()->as_C_string();
1636   strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1637   char current_method[CompilerCounters::cmname_buffer_length];
1638   size_t maxLen = CompilerCounters::cmname_buffer_length;
1639 
1640   if (UsePerfData) {
1641     const char* class_name = method->method_holder()->klass_part()->name()->as_C_string();
1642 
1643     size_t s1len = strlen(class_name);
1644     size_t s2len = strlen(method_name);
1645 
1646     // check if we need to truncate the string
1647     if (s1len + s2len + 2 > maxLen) {
1648 
1649       // the strategy is to lop off the leading characters of the
1650       // class name and the trailing characters of the method name.
1651 
1652       if (s2len + 2 > maxLen) {
1653         // lop of the entire class name string, let snprintf handle
1654         // truncation of the method name.
1655         class_name += s1len; // null string
1656       }
1657       else {
1658         // lop off the extra characters from the front of the class name
1659         class_name += ((s1len + s2len + 2) - maxLen);
1660       }
1661     }
1662 
1663     jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1664   }
1665 
1666   if (CICountOSR && is_osr) {
1667     _last_compile_type = osr_compile;
1668   } else {
1669     _last_compile_type = normal_compile;
1670   }
1671   _last_compile_level = comp_level;
1672 
1673   if (UsePerfData) {
1674     CompilerCounters* counters = thread->counters();
1675     counters->set_current_method(current_method);
1676     counters->set_compile_type((jlong)_last_compile_type);
1677   }
1678 }
1679 
1680 
1681 // ------------------------------------------------------------------
1682 // CompileBroker::push_jni_handle_block
1683 //
1684 // Push on a new block of JNI handles.
1685 void CompileBroker::push_jni_handle_block() {
1686   JavaThread* thread = JavaThread::current();
1687 
1688   // Allocate a new block for JNI handles.
1689   // Inlined code from jni_PushLocalFrame()
1690   JNIHandleBlock* java_handles = thread->active_handles();
1691   JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
1692   assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
1693   compile_handles->set_pop_frame_link(java_handles);  // make sure java handles get gc'd.
1694   thread->set_active_handles(compile_handles);
1695 }
1696 
1697 
1698 // ------------------------------------------------------------------
1699 // CompileBroker::pop_jni_handle_block
1700 //
1701 // Pop off the current block of JNI handles.
1702 void CompileBroker::pop_jni_handle_block() {
1703   JavaThread* thread = JavaThread::current();
1704 
1705   // Release our JNI handle block
1706   JNIHandleBlock* compile_handles = thread->active_handles();
1707   JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
1708   thread->set_active_handles(java_handles);
1709   compile_handles->set_pop_frame_link(NULL);
1710   JNIHandleBlock::release_block(compile_handles, thread); // may block
1711 }
1712 
1713 
1714 // ------------------------------------------------------------------
1715 // CompileBroker::check_break_at
1716 //
1717 // Should the compilation break at the current compilation.
1718 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
1719   if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
1720     return true;
1721   } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
1722     return true;
1723   } else {
1724     return (compile_id == CIBreakAt);
1725   }
1726 }
1727 
1728 // ------------------------------------------------------------------
1729 // CompileBroker::collect_statistics
1730 //
1731 // Collect statistics about the compilation.
1732 
1733 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
1734   bool success = task->is_success();
1735   methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle()));
1736   uint compile_id = task->compile_id();
1737   bool is_osr = (task->osr_bci() != standard_entry_bci);
1738   nmethod* code = task->code();
1739   CompilerCounters* counters = thread->counters();
1740 
1741   assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
1742   MutexLocker locker(CompileStatistics_lock);
1743 
1744   // _perf variables are production performance counters which are
1745   // updated regardless of the setting of the CITime and CITimeEach flags
1746   //
1747   if (!success) {
1748     _total_bailout_count++;
1749     if (UsePerfData) {
1750       _perf_last_failed_method->set_value(counters->current_method());
1751       _perf_last_failed_type->set_value(counters->compile_type());
1752       _perf_total_bailout_count->inc();
1753     }
1754   } else if (code == NULL) {
1755     if (UsePerfData) {
1756       _perf_last_invalidated_method->set_value(counters->current_method());
1757       _perf_last_invalidated_type->set_value(counters->compile_type());
1758       _perf_total_invalidated_count->inc();
1759     }
1760     _total_invalidated_count++;
1761   } else {
1762     // Compilation succeeded
1763 
1764     // update compilation ticks - used by the implementation of
1765     // java.lang.management.CompilationMBean
1766     _perf_total_compilation->inc(time.ticks());
1767 
1768     if (CITime) {
1769       _t_total_compilation.add(time);
1770       if (is_osr) {
1771         _t_osr_compilation.add(time);
1772         _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
1773       } else {
1774         _t_standard_compilation.add(time);
1775         _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
1776       }
1777     }
1778 
1779     if (UsePerfData) {
1780       // save the name of the last method compiled
1781       _perf_last_method->set_value(counters->current_method());
1782       _perf_last_compile_type->set_value(counters->compile_type());
1783       _perf_last_compile_size->set_value(method->code_size() +
1784                                          task->num_inlined_bytecodes());
1785       if (is_osr) {
1786         _perf_osr_compilation->inc(time.ticks());
1787         _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
1788       } else {
1789         _perf_standard_compilation->inc(time.ticks());
1790         _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
1791       }
1792     }
1793 
1794     if (CITimeEach) {
1795       float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
1796       tty->print_cr("%3d   seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
1797                     compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
1798     }
1799 
1800     // Collect counts of successful compilations
1801     _sum_nmethod_size += code->total_size();
1802     _sum_nmethod_code_size += code->code_size();
1803     _total_compile_count++;
1804 
1805     if (UsePerfData) {
1806       _perf_sum_nmethod_size->inc(code->total_size());
1807       _perf_sum_nmethod_code_size->inc(code->code_size());
1808       _perf_total_compile_count->inc();
1809     }
1810 
1811     if (is_osr) {
1812       if (UsePerfData) _perf_total_osr_compile_count->inc();
1813       _total_osr_compile_count++;
1814     } else {
1815       if (UsePerfData) _perf_total_standard_compile_count->inc();
1816       _total_standard_compile_count++;
1817     }
1818   }
1819   // set the current method for the thread to null
1820   if (UsePerfData) counters->set_current_method("");
1821 }
1822 
1823 
1824 
1825 void CompileBroker::print_times() {
1826   tty->cr();
1827   tty->print_cr("Accumulated compiler times (for compiled methods only)");
1828   tty->print_cr("------------------------------------------------");
1829                //0000000000111111111122222222223333333333444444444455555555556666666666
1830                //0123456789012345678901234567890123456789012345678901234567890123456789
1831   tty->print_cr("  Total compilation time   : %6.3f s", CompileBroker::_t_total_compilation.seconds());
1832   tty->print_cr("    Standard compilation   : %6.3f s, Average : %2.3f",
1833                 CompileBroker::_t_standard_compilation.seconds(),
1834                 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
1835   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);
1836   compiler(CompLevel_fast_compile)->print_timers();
1837   if (compiler(CompLevel_fast_compile) != compiler(CompLevel_highest_tier)) {
1838     compiler(CompLevel_highest_tier)->print_timers();
1839   }
1840 
1841   tty->cr();
1842   int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
1843   tty->print_cr("  Total compiled bytecodes : %6d bytes", tcb);
1844   tty->print_cr("    Standard compilation   : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
1845   tty->print_cr("    On stack replacement   : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
1846   int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
1847   tty->print_cr("  Average compilation speed: %6d bytes/s", bps);
1848   tty->cr();
1849   tty->print_cr("  nmethod code size        : %6d bytes", CompileBroker::_sum_nmethod_code_size);
1850   tty->print_cr("  nmethod total size       : %6d bytes", CompileBroker::_sum_nmethod_size);
1851 }
1852 
1853 
1854 // Debugging output for failure
1855 void CompileBroker::print_last_compile() {
1856   if ( _last_compile_level != CompLevel_none &&
1857        compiler(_last_compile_level) != NULL &&
1858        _last_method_compiled != NULL &&
1859        _last_compile_type != no_compile) {
1860     if (_last_compile_type == osr_compile) {
1861       tty->print_cr("Last parse:  [osr]%d+++(%d) %s",
1862                     _osr_compilation_id, _last_compile_level, _last_method_compiled);
1863     } else {
1864       tty->print_cr("Last parse:  %d+++(%d) %s",
1865                     _compilation_id, _last_compile_level, _last_method_compiled);
1866     }
1867   }
1868 }
1869 
1870 
1871 void CompileBroker::print_compiler_threads_on(outputStream* st) {
1872 #ifndef PRODUCT
1873   st->print_cr("Compiler thread printing unimplemented.");
1874   st->cr();
1875 #endif
1876 }