1 /*
   2  * Copyright (c) 1999, 2017, 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 "precompiled.hpp"
  26 #include "classfile/symbolTable.hpp"
  27 #include "classfile/systemDictionary.hpp"
  28 #include "classfile/vmSymbols.hpp"
  29 #include "code/codeCache.hpp"
  30 #include "code/dependencyContext.hpp"
  31 #include "compiler/compileBroker.hpp"
  32 #include "compiler/compileLog.hpp"
  33 #include "compiler/compilerOracle.hpp"
  34 #include "compiler/directivesParser.hpp"
  35 #include "interpreter/linkResolver.hpp"
  36 #include "logging/log.hpp"
  37 #include "logging/logStream.hpp"
  38 #include "memory/allocation.inline.hpp"
  39 #include "memory/resourceArea.hpp"
  40 #include "oops/methodData.hpp"
  41 #include "oops/method.hpp"
  42 #include "oops/oop.inline.hpp"
  43 #include "prims/jvm.h"
  44 #include "prims/nativeLookup.hpp"
  45 #include "prims/whitebox.hpp"
  46 #include "runtime/arguments.hpp"
  47 #include "runtime/atomic.hpp"
  48 #include "runtime/compilationPolicy.hpp"
  49 #include "runtime/init.hpp"
  50 #include "runtime/interfaceSupport.hpp"
  51 #include "runtime/javaCalls.hpp"
  52 #include "runtime/os.hpp"
  53 #include "runtime/sharedRuntime.hpp"
  54 #include "runtime/sweeper.hpp"
  55 #include "runtime/timerTrace.hpp"
  56 #include "trace/tracing.hpp"
  57 #include "utilities/debug.hpp"
  58 #include "utilities/dtrace.hpp"
  59 #include "utilities/events.hpp"
  60 #include "utilities/formatBuffer.hpp"
  61 #ifdef COMPILER1
  62 #include "c1/c1_Compiler.hpp"
  63 #endif
  64 #if INCLUDE_JVMCI
  65 #include "jvmci/jvmciCompiler.hpp"
  66 #include "jvmci/jvmciRuntime.hpp"
  67 #include "jvmci/jvmciJavaClasses.hpp"
  68 #include "runtime/vframe.hpp"
  69 #endif
  70 #ifdef COMPILER2
  71 #include "opto/c2compiler.hpp"
  72 #endif
  73 #ifdef SHARK
  74 #include "shark/sharkCompiler.hpp"
  75 #endif
  76 
  77 #ifdef DTRACE_ENABLED
  78 
  79 // Only bother with this argument setup if dtrace is available
  80 
  81 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)             \
  82   {                                                                      \
  83     Symbol* klass_name = (method)->klass_name();                         \
  84     Symbol* name = (method)->name();                                     \
  85     Symbol* signature = (method)->signature();                           \
  86     HOTSPOT_METHOD_COMPILE_BEGIN(                                        \
  87       (char *) comp_name, strlen(comp_name),                             \
  88       (char *) klass_name->bytes(), klass_name->utf8_length(),           \
  89       (char *) name->bytes(), name->utf8_length(),                       \
  90       (char *) signature->bytes(), signature->utf8_length());            \
  91   }
  92 
  93 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)      \
  94   {                                                                      \
  95     Symbol* klass_name = (method)->klass_name();                         \
  96     Symbol* name = (method)->name();                                     \
  97     Symbol* signature = (method)->signature();                           \
  98     HOTSPOT_METHOD_COMPILE_END(                                          \
  99       (char *) comp_name, strlen(comp_name),                             \
 100       (char *) klass_name->bytes(), klass_name->utf8_length(),           \
 101       (char *) name->bytes(), name->utf8_length(),                       \
 102       (char *) signature->bytes(), signature->utf8_length(), (success)); \
 103   }
 104 
 105 #else //  ndef DTRACE_ENABLED
 106 
 107 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
 108 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
 109 
 110 #endif // ndef DTRACE_ENABLED
 111 
 112 bool CompileBroker::_initialized = false;
 113 volatile bool CompileBroker::_should_block = false;
 114 volatile jint CompileBroker::_print_compilation_warning = 0;
 115 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
 116 
 117 // The installed compiler(s)
 118 AbstractCompiler* CompileBroker::_compilers[2];
 119 
 120 // These counters are used to assign an unique ID to each compilation.
 121 volatile jint CompileBroker::_compilation_id     = 0;
 122 volatile jint CompileBroker::_osr_compilation_id = 0;
 123 
 124 // Debugging information
 125 int  CompileBroker::_last_compile_type     = no_compile;
 126 int  CompileBroker::_last_compile_level    = CompLevel_none;
 127 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
 128 
 129 // Performance counters
 130 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
 131 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
 132 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
 133 
 134 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
 135 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
 136 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
 137 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
 138 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
 139 
 140 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
 141 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
 142 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
 143 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
 144 
 145 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
 146 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
 147 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
 148 PerfVariable*       CompileBroker::_perf_last_compile_type = NULL;
 149 PerfVariable*       CompileBroker::_perf_last_compile_size = NULL;
 150 PerfVariable*       CompileBroker::_perf_last_failed_type = NULL;
 151 PerfVariable*       CompileBroker::_perf_last_invalidated_type = NULL;
 152 
 153 // Timers and counters for generating statistics
 154 elapsedTimer CompileBroker::_t_total_compilation;
 155 elapsedTimer CompileBroker::_t_osr_compilation;
 156 elapsedTimer CompileBroker::_t_standard_compilation;
 157 elapsedTimer CompileBroker::_t_invalidated_compilation;
 158 elapsedTimer CompileBroker::_t_bailedout_compilation;
 159 
 160 int CompileBroker::_total_bailout_count          = 0;
 161 int CompileBroker::_total_invalidated_count      = 0;
 162 int CompileBroker::_total_compile_count          = 0;
 163 int CompileBroker::_total_osr_compile_count      = 0;
 164 int CompileBroker::_total_standard_compile_count = 0;
 165 
 166 int CompileBroker::_sum_osr_bytes_compiled       = 0;
 167 int CompileBroker::_sum_standard_bytes_compiled  = 0;
 168 int CompileBroker::_sum_nmethod_size             = 0;
 169 int CompileBroker::_sum_nmethod_code_size        = 0;
 170 
 171 long CompileBroker::_peak_compilation_time       = 0;
 172 
 173 CompileQueue* CompileBroker::_c2_compile_queue   = NULL;
 174 CompileQueue* CompileBroker::_c1_compile_queue   = NULL;
 175 
 176 
 177 
 178 class CompilationLog : public StringEventLog {
 179  public:
 180   CompilationLog() : StringEventLog("Compilation events") {
 181   }
 182 
 183   void log_compile(JavaThread* thread, CompileTask* task) {
 184     StringLogMessage lm;
 185     stringStream sstr = lm.stream();
 186     // msg.time_stamp().update_to(tty->time_stamp().ticks());
 187     task->print(&sstr, NULL, true, false);
 188     log(thread, "%s", (const char*)lm);
 189   }
 190 
 191   void log_nmethod(JavaThread* thread, nmethod* nm) {
 192     log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
 193         nm->compile_id(), nm->is_osr_method() ? "%" : "",
 194         p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
 195   }
 196 
 197   void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
 198     StringLogMessage lm;
 199     lm.print("%4d   COMPILE SKIPPED: %s", task->compile_id(), reason);
 200     if (retry_message != NULL) {
 201       lm.append(" (%s)", retry_message);
 202     }
 203     lm.print("\n");
 204     log(thread, "%s", (const char*)lm);
 205   }
 206 
 207   void log_metaspace_failure(const char* reason) {
 208     ResourceMark rm;
 209     StringLogMessage lm;
 210     lm.print("%4d   COMPILE PROFILING SKIPPED: %s", -1, reason);
 211     lm.print("\n");
 212     log(JavaThread::current(), "%s", (const char*)lm);
 213   }
 214 };
 215 
 216 static CompilationLog* _compilation_log = NULL;
 217 
 218 bool compileBroker_init() {
 219   if (LogEvents) {
 220     _compilation_log = new CompilationLog();
 221   }
 222 
 223   // init directives stack, adding default directive
 224   DirectivesStack::init();
 225 
 226   if (DirectivesParser::has_file()) {
 227     return DirectivesParser::parse_from_flag();
 228   } else if (CompilerDirectivesPrint) {
 229     // Print default directive even when no other was added
 230     DirectivesStack::print(tty);
 231   }
 232 
 233   return true;
 234 }
 235 
 236 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
 237   CompilerThread* thread = CompilerThread::current();
 238   thread->set_task(task);
 239 #if INCLUDE_JVMCI
 240   if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
 241     task->set_jvmci_compiler_thread(thread);
 242   }
 243 #endif
 244   CompileLog*     log  = thread->log();
 245   if (log != NULL)  task->log_task_start(log);
 246 }
 247 
 248 CompileTaskWrapper::~CompileTaskWrapper() {
 249   CompilerThread* thread = CompilerThread::current();
 250   CompileTask* task = thread->task();
 251   CompileLog*  log  = thread->log();
 252   if (log != NULL)  task->log_task_done(log);
 253   thread->set_task(NULL);
 254   task->set_code_handle(NULL);
 255   thread->set_env(NULL);
 256   if (task->is_blocking()) {
 257     bool free_task = false;
 258     {
 259       MutexLocker notifier(task->lock(), thread);
 260       task->mark_complete();
 261 #if INCLUDE_JVMCI
 262       if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
 263         if (!task->has_waiter()) {
 264           // The waiting thread timed out and thus did not free the task.
 265           free_task = true;
 266         }
 267         task->set_jvmci_compiler_thread(NULL);
 268       }
 269 #endif
 270       if (!free_task) {
 271         // Notify the waiting thread that the compilation has completed
 272         // so that it can free the task.
 273         task->lock()->notify_all();
 274       }
 275     }
 276     if (free_task) {
 277       // The task can only be freed once the task lock is released.
 278       CompileTask::free(task);
 279     }
 280   } else {
 281     task->mark_complete();
 282 
 283     // By convention, the compiling thread is responsible for
 284     // recycling a non-blocking CompileTask.
 285     CompileTask::free(task);
 286   }
 287 }
 288 
 289 /**
 290  * Add a CompileTask to a CompileQueue.
 291  */
 292 void CompileQueue::add(CompileTask* task) {
 293   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 294 
 295   task->set_next(NULL);
 296   task->set_prev(NULL);
 297 
 298   if (_last == NULL) {
 299     // The compile queue is empty.
 300     assert(_first == NULL, "queue is empty");
 301     _first = task;
 302     _last = task;
 303   } else {
 304     // Append the task to the queue.
 305     assert(_last->next() == NULL, "not last");
 306     _last->set_next(task);
 307     task->set_prev(_last);
 308     _last = task;
 309   }
 310   ++_size;
 311 
 312   // Mark the method as being in the compile queue.
 313   task->method()->set_queued_for_compilation();
 314 
 315   if (CIPrintCompileQueue) {
 316     print_tty();
 317   }
 318 
 319   if (LogCompilation && xtty != NULL) {
 320     task->log_task_queued();
 321   }
 322 
 323   // Notify CompilerThreads that a task is available.
 324   MethodCompileQueue_lock->notify_all();
 325 }
 326 
 327 /**
 328  * Empties compilation queue by putting all compilation tasks onto
 329  * a freelist. Furthermore, the method wakes up all threads that are
 330  * waiting on a compilation task to finish. This can happen if background
 331  * compilation is disabled.
 332  */
 333 void CompileQueue::free_all() {
 334   MutexLocker mu(MethodCompileQueue_lock);
 335   CompileTask* next = _first;
 336 
 337   // Iterate over all tasks in the compile queue
 338   while (next != NULL) {
 339     CompileTask* current = next;
 340     next = current->next();
 341     {
 342       // Wake up thread that blocks on the compile task.
 343       MutexLocker ct_lock(current->lock());
 344       current->lock()->notify();
 345     }
 346     // Put the task back on the freelist.
 347     CompileTask::free(current);
 348   }
 349   _first = NULL;
 350 
 351   // Wake up all threads that block on the queue.
 352   MethodCompileQueue_lock->notify_all();
 353 }
 354 
 355 /**
 356  * Get the next CompileTask from a CompileQueue
 357  */
 358 CompileTask* CompileQueue::get() {
 359   // save methods from RedefineClasses across safepoint
 360   // across MethodCompileQueue_lock below.
 361   methodHandle save_method;
 362   methodHandle save_hot_method;
 363 
 364   MutexLocker locker(MethodCompileQueue_lock);
 365   // If _first is NULL we have no more compile jobs. There are two reasons for
 366   // having no compile jobs: First, we compiled everything we wanted. Second,
 367   // we ran out of code cache so compilation has been disabled. In the latter
 368   // case we perform code cache sweeps to free memory such that we can re-enable
 369   // compilation.
 370   while (_first == NULL) {
 371     // Exit loop if compilation is disabled forever
 372     if (CompileBroker::is_compilation_disabled_forever()) {
 373       return NULL;
 374     }
 375 
 376     // If there are no compilation tasks and we can compile new jobs
 377     // (i.e., there is enough free space in the code cache) there is
 378     // no need to invoke the sweeper. As a result, the hotness of methods
 379     // remains unchanged. This behavior is desired, since we want to keep
 380     // the stable state, i.e., we do not want to evict methods from the
 381     // code cache if it is unnecessary.
 382     // We need a timed wait here, since compiler threads can exit if compilation
 383     // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
 384     // is not critical and we do not want idle compiler threads to wake up too often.
 385     MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
 386   }
 387 
 388   if (CompileBroker::is_compilation_disabled_forever()) {
 389     return NULL;
 390   }
 391 
 392   CompileTask* task;
 393   {
 394     NoSafepointVerifier nsv;
 395     task = CompilationPolicy::policy()->select_task(this);
 396   }
 397 
 398   if (task != NULL) {
 399     // Save method pointers across unlock safepoint.  The task is removed from
 400     // the compilation queue, which is walked during RedefineClasses.
 401     save_method = methodHandle(task->method());
 402     save_hot_method = methodHandle(task->hot_method());
 403 
 404     remove(task);
 405     purge_stale_tasks(); // may temporarily release MCQ lock
 406   }
 407 
 408   return task;
 409 }
 410 
 411 // Clean & deallocate stale compile tasks.
 412 // Temporarily releases MethodCompileQueue lock.
 413 void CompileQueue::purge_stale_tasks() {
 414   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 415   if (_first_stale != NULL) {
 416     // Stale tasks are purged when MCQ lock is released,
 417     // but _first_stale updates are protected by MCQ lock.
 418     // Once task processing starts and MCQ lock is released,
 419     // other compiler threads can reuse _first_stale.
 420     CompileTask* head = _first_stale;
 421     _first_stale = NULL;
 422     {
 423       MutexUnlocker ul(MethodCompileQueue_lock);
 424       for (CompileTask* task = head; task != NULL; ) {
 425         CompileTask* next_task = task->next();
 426         CompileTaskWrapper ctw(task); // Frees the task
 427         task->set_failure_reason("stale task");
 428         task = next_task;
 429       }
 430     }
 431   }
 432 }
 433 
 434 void CompileQueue::remove(CompileTask* task) {
 435    assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 436   if (task->prev() != NULL) {
 437     task->prev()->set_next(task->next());
 438   } else {
 439     // max is the first element
 440     assert(task == _first, "Sanity");
 441     _first = task->next();
 442   }
 443 
 444   if (task->next() != NULL) {
 445     task->next()->set_prev(task->prev());
 446   } else {
 447     // max is the last element
 448     assert(task == _last, "Sanity");
 449     _last = task->prev();
 450   }
 451   --_size;
 452 }
 453 
 454 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
 455   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 456   remove(task);
 457 
 458   // Enqueue the task for reclamation (should be done outside MCQ lock)
 459   task->set_next(_first_stale);
 460   task->set_prev(NULL);
 461   _first_stale = task;
 462 }
 463 
 464 // methods in the compile queue need to be marked as used on the stack
 465 // so that they don't get reclaimed by Redefine Classes
 466 void CompileQueue::mark_on_stack() {
 467   CompileTask* task = _first;
 468   while (task != NULL) {
 469     task->mark_on_stack();
 470     task = task->next();
 471   }
 472 }
 473 
 474 
 475 CompileQueue* CompileBroker::compile_queue(int comp_level) {
 476   if (is_c2_compile(comp_level)) return _c2_compile_queue;
 477   if (is_c1_compile(comp_level)) return _c1_compile_queue;
 478   return NULL;
 479 }
 480 
 481 void CompileBroker::print_compile_queues(outputStream* st) {
 482   st->print_cr("Current compiles: ");
 483   MutexLocker locker(MethodCompileQueue_lock);
 484 
 485   char buf[2000];
 486   int buflen = sizeof(buf);
 487   Threads::print_threads_compiling(st, buf, buflen);
 488 
 489   st->cr();
 490   if (_c1_compile_queue != NULL) {
 491     _c1_compile_queue->print(st);
 492   }
 493   if (_c2_compile_queue != NULL) {
 494     _c2_compile_queue->print(st);
 495   }
 496 }
 497 
 498 void CompileQueue::print(outputStream* st) {
 499   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 500   st->print_cr("%s:", name());
 501   CompileTask* task = _first;
 502   if (task == NULL) {
 503     st->print_cr("Empty");
 504   } else {
 505     while (task != NULL) {
 506       task->print(st, NULL, true, true);
 507       task = task->next();
 508     }
 509   }
 510   st->cr();
 511 }
 512 
 513 void CompileQueue::print_tty() {
 514   ttyLocker ttyl;
 515   print(tty);
 516 }
 517 
 518 CompilerCounters::CompilerCounters() {
 519   _current_method[0] = '\0';
 520   _compile_type = CompileBroker::no_compile;
 521 }
 522 
 523 // ------------------------------------------------------------------
 524 // CompileBroker::compilation_init
 525 //
 526 // Initialize the Compilation object
 527 void CompileBroker::compilation_init(TRAPS) {
 528   _last_method_compiled[0] = '\0';
 529 
 530   // No need to initialize compilation system if we do not use it.
 531   if (!UseCompiler) {
 532     return;
 533   }
 534 #ifndef SHARK
 535   // Set the interface to the current compiler(s).
 536   int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
 537   int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
 538 
 539 #if INCLUDE_JVMCI
 540   if (EnableJVMCI) {
 541     // This is creating a JVMCICompiler singleton.
 542     JVMCICompiler* jvmci = new JVMCICompiler();
 543 
 544     if (UseJVMCICompiler) {
 545       _compilers[1] = jvmci;
 546       if (FLAG_IS_DEFAULT(JVMCIThreads)) {
 547         if (BootstrapJVMCI) {
 548           // JVMCI will bootstrap so give it more threads
 549           c2_count = MIN2(32, os::active_processor_count());
 550         }
 551       } else {
 552         c2_count = JVMCIThreads;
 553       }
 554       if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
 555       } else {
 556         c1_count = JVMCIHostThreads;
 557       }
 558     }
 559   }
 560 #endif // INCLUDE_JVMCI
 561 
 562 #ifdef COMPILER1
 563   if (c1_count > 0) {
 564     _compilers[0] = new Compiler();
 565   }
 566 #endif // COMPILER1
 567 
 568 #ifdef COMPILER2
 569   if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
 570     if (c2_count > 0) {
 571       _compilers[1] = new C2Compiler();
 572     }
 573   }
 574 #endif // COMPILER2
 575 
 576 #else // SHARK
 577   int c1_count = 0;
 578   int c2_count = 1;
 579 
 580   _compilers[1] = new SharkCompiler();
 581 #endif // SHARK
 582 
 583   // Start the compiler thread(s) and the sweeper thread
 584   init_compiler_sweeper_threads(c1_count, c2_count);
 585   // totalTime performance counter is always created as it is required
 586   // by the implementation of java.lang.management.CompilationMBean.
 587   {
 588     EXCEPTION_MARK;
 589     _perf_total_compilation =
 590                  PerfDataManager::create_counter(JAVA_CI, "totalTime",
 591                                                  PerfData::U_Ticks, CHECK);
 592   }
 593 
 594   if (UsePerfData) {
 595 
 596     EXCEPTION_MARK;
 597 
 598     // create the jvmstat performance counters
 599     _perf_osr_compilation =
 600                  PerfDataManager::create_counter(SUN_CI, "osrTime",
 601                                                  PerfData::U_Ticks, CHECK);
 602 
 603     _perf_standard_compilation =
 604                  PerfDataManager::create_counter(SUN_CI, "standardTime",
 605                                                  PerfData::U_Ticks, CHECK);
 606 
 607     _perf_total_bailout_count =
 608                  PerfDataManager::create_counter(SUN_CI, "totalBailouts",
 609                                                  PerfData::U_Events, CHECK);
 610 
 611     _perf_total_invalidated_count =
 612                  PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
 613                                                  PerfData::U_Events, CHECK);
 614 
 615     _perf_total_compile_count =
 616                  PerfDataManager::create_counter(SUN_CI, "totalCompiles",
 617                                                  PerfData::U_Events, CHECK);
 618     _perf_total_osr_compile_count =
 619                  PerfDataManager::create_counter(SUN_CI, "osrCompiles",
 620                                                  PerfData::U_Events, CHECK);
 621 
 622     _perf_total_standard_compile_count =
 623                  PerfDataManager::create_counter(SUN_CI, "standardCompiles",
 624                                                  PerfData::U_Events, CHECK);
 625 
 626     _perf_sum_osr_bytes_compiled =
 627                  PerfDataManager::create_counter(SUN_CI, "osrBytes",
 628                                                  PerfData::U_Bytes, CHECK);
 629 
 630     _perf_sum_standard_bytes_compiled =
 631                  PerfDataManager::create_counter(SUN_CI, "standardBytes",
 632                                                  PerfData::U_Bytes, CHECK);
 633 
 634     _perf_sum_nmethod_size =
 635                  PerfDataManager::create_counter(SUN_CI, "nmethodSize",
 636                                                  PerfData::U_Bytes, CHECK);
 637 
 638     _perf_sum_nmethod_code_size =
 639                  PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
 640                                                  PerfData::U_Bytes, CHECK);
 641 
 642     _perf_last_method =
 643                  PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
 644                                        CompilerCounters::cmname_buffer_length,
 645                                        "", CHECK);
 646 
 647     _perf_last_failed_method =
 648             PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
 649                                        CompilerCounters::cmname_buffer_length,
 650                                        "", CHECK);
 651 
 652     _perf_last_invalidated_method =
 653         PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
 654                                      CompilerCounters::cmname_buffer_length,
 655                                      "", CHECK);
 656 
 657     _perf_last_compile_type =
 658              PerfDataManager::create_variable(SUN_CI, "lastType",
 659                                               PerfData::U_None,
 660                                               (jlong)CompileBroker::no_compile,
 661                                               CHECK);
 662 
 663     _perf_last_compile_size =
 664              PerfDataManager::create_variable(SUN_CI, "lastSize",
 665                                               PerfData::U_Bytes,
 666                                               (jlong)CompileBroker::no_compile,
 667                                               CHECK);
 668 
 669 
 670     _perf_last_failed_type =
 671              PerfDataManager::create_variable(SUN_CI, "lastFailedType",
 672                                               PerfData::U_None,
 673                                               (jlong)CompileBroker::no_compile,
 674                                               CHECK);
 675 
 676     _perf_last_invalidated_type =
 677          PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
 678                                           PerfData::U_None,
 679                                           (jlong)CompileBroker::no_compile,
 680                                           CHECK);
 681   }
 682 
 683   _initialized = true;
 684 }
 685 
 686 
 687 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
 688                                        AbstractCompiler* comp, bool compiler_thread, TRAPS) {
 689   JavaThread* thread = NULL;
 690   Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0);
 691   InstanceKlass* klass = InstanceKlass::cast(k);
 692   instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
 693   Handle string = java_lang_String::create_from_str(name, CHECK_0);
 694 
 695   // Initialize thread_oop to put it into the system threadGroup
 696   Handle thread_group (THREAD,  Universe::system_thread_group());
 697   JavaValue result(T_VOID);
 698   JavaCalls::call_special(&result, thread_oop,
 699                        klass,
 700                        vmSymbols::object_initializer_name(),
 701                        vmSymbols::threadgroup_string_void_signature(),
 702                        thread_group,
 703                        string,
 704                        CHECK_0);
 705 
 706   {
 707     MutexLocker mu(Threads_lock, THREAD);
 708     if (compiler_thread) {
 709       thread = new CompilerThread(queue, counters);
 710     } else {
 711       thread = new CodeCacheSweeperThread();
 712     }
 713     // At this point the new CompilerThread data-races with this startup
 714     // thread (which I believe is the primoridal thread and NOT the VM
 715     // thread).  This means Java bytecodes being executed at startup can
 716     // queue compile jobs which will run at whatever default priority the
 717     // newly created CompilerThread runs at.
 718 
 719 
 720     // At this point it may be possible that no osthread was created for the
 721     // JavaThread due to lack of memory. We would have to throw an exception
 722     // in that case. However, since this must work and we do not allow
 723     // exceptions anyway, check and abort if this fails. But first release the
 724     // lock.
 725 
 726     if (thread != NULL && thread->osthread() != NULL) {
 727 
 728       java_lang_Thread::set_thread(thread_oop(), thread);
 729 
 730       // Note that this only sets the JavaThread _priority field, which by
 731       // definition is limited to Java priorities and not OS priorities.
 732       // The os-priority is set in the CompilerThread startup code itself
 733 
 734       java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
 735 
 736       // Note that we cannot call os::set_priority because it expects Java
 737       // priorities and we are *explicitly* using OS priorities so that it's
 738       // possible to set the compiler thread priority higher than any Java
 739       // thread.
 740 
 741       int native_prio = CompilerThreadPriority;
 742       if (native_prio == -1) {
 743         if (UseCriticalCompilerThreadPriority) {
 744           native_prio = os::java_to_os_priority[CriticalPriority];
 745         } else {
 746           native_prio = os::java_to_os_priority[NearMaxPriority];
 747         }
 748       }
 749       os::set_native_priority(thread, native_prio);
 750 
 751       java_lang_Thread::set_daemon(thread_oop());
 752 
 753       thread->set_threadObj(thread_oop());
 754       if (compiler_thread) {
 755         thread->as_CompilerThread()->set_compiler(comp);
 756       }
 757       Threads::add(thread);
 758       Thread::start(thread);
 759     }
 760   }
 761 
 762   // First release lock before aborting VM.
 763   if (thread == NULL || thread->osthread() == NULL) {
 764     vm_exit_during_initialization("java.lang.OutOfMemoryError",
 765                                   os::native_thread_creation_failed_msg());
 766   }
 767 
 768   // Let go of Threads_lock before yielding
 769   os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
 770 
 771   return thread;
 772 }
 773 
 774 
 775 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) {
 776   EXCEPTION_MARK;
 777 #if !defined(ZERO) && !defined(SHARK)
 778   assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
 779 #endif // !ZERO && !SHARK
 780   // Initialize the compilation queue
 781   if (c2_compiler_count > 0) {
 782     const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
 783     _c2_compile_queue  = new CompileQueue(name);
 784     _compilers[1]->set_num_compiler_threads(c2_compiler_count);
 785   }
 786   if (c1_compiler_count > 0) {
 787     _c1_compile_queue  = new CompileQueue("C1 compile queue");
 788     _compilers[0]->set_num_compiler_threads(c1_compiler_count);
 789   }
 790 
 791   int compiler_count = c1_compiler_count + c2_compiler_count;
 792 
 793   char name_buffer[256];
 794   const bool compiler_thread = true;
 795   for (int i = 0; i < c2_compiler_count; i++) {
 796     // Create a name for our thread.
 797     sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
 798     CompilerCounters* counters = new CompilerCounters();
 799     // Shark and C2
 800     make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK);
 801   }
 802 
 803   for (int i = c2_compiler_count; i < compiler_count; i++) {
 804     // Create a name for our thread.
 805     sprintf(name_buffer, "C1 CompilerThread%d", i);
 806     CompilerCounters* counters = new CompilerCounters();
 807     // C1
 808     make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK);
 809   }
 810 
 811   if (UsePerfData) {
 812     PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
 813   }
 814 
 815   if (MethodFlushing) {
 816     // Initialize the sweeper thread
 817     make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK);
 818   }
 819 }
 820 
 821 
 822 /**
 823  * Set the methods on the stack as on_stack so that redefine classes doesn't
 824  * reclaim them. This method is executed at a safepoint.
 825  */
 826 void CompileBroker::mark_on_stack() {
 827   assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
 828   // Since we are at a safepoint, we do not need a lock to access
 829   // the compile queues.
 830   if (_c2_compile_queue != NULL) {
 831     _c2_compile_queue->mark_on_stack();
 832   }
 833   if (_c1_compile_queue != NULL) {
 834     _c1_compile_queue->mark_on_stack();
 835   }
 836 }
 837 
 838 // ------------------------------------------------------------------
 839 // CompileBroker::compile_method
 840 //
 841 // Request compilation of a method.
 842 void CompileBroker::compile_method_base(const methodHandle& method,
 843                                         int osr_bci,
 844                                         int comp_level,
 845                                         const methodHandle& hot_method,
 846                                         int hot_count,
 847                                         CompileTask::CompileReason compile_reason,
 848                                         bool blocking,
 849                                         Thread* thread) {
 850   guarantee(!method->is_abstract(), "cannot compile abstract methods");
 851   assert(method->method_holder()->is_instance_klass(),
 852          "sanity check");
 853   assert(!method->method_holder()->is_not_initialized(),
 854          "method holder must be initialized");
 855   assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
 856 
 857   if (CIPrintRequests) {
 858     tty->print("request: ");
 859     method->print_short_name(tty);
 860     if (osr_bci != InvocationEntryBci) {
 861       tty->print(" osr_bci: %d", osr_bci);
 862     }
 863     tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
 864     if (!hot_method.is_null()) {
 865       tty->print(" hot: ");
 866       if (hot_method() != method()) {
 867           hot_method->print_short_name(tty);
 868       } else {
 869         tty->print("yes");
 870       }
 871     }
 872     tty->cr();
 873   }
 874 
 875   // A request has been made for compilation.  Before we do any
 876   // real work, check to see if the method has been compiled
 877   // in the meantime with a definitive result.
 878   if (compilation_is_complete(method, osr_bci, comp_level)) {
 879     return;
 880   }
 881 
 882 #ifndef PRODUCT
 883   if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
 884     if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
 885       // Positive OSROnlyBCI means only compile that bci.  Negative means don't compile that BCI.
 886       return;
 887     }
 888   }
 889 #endif
 890 
 891   // If this method is already in the compile queue, then
 892   // we do not block the current thread.
 893   if (compilation_is_in_queue(method)) {
 894     // We may want to decay our counter a bit here to prevent
 895     // multiple denied requests for compilation.  This is an
 896     // open compilation policy issue. Note: The other possibility,
 897     // in the case that this is a blocking compile request, is to have
 898     // all subsequent blocking requesters wait for completion of
 899     // ongoing compiles. Note that in this case we'll need a protocol
 900     // for freeing the associated compile tasks. [Or we could have
 901     // a single static monitor on which all these waiters sleep.]
 902     return;
 903   }
 904 
 905   if (TieredCompilation) {
 906     // Tiered policy requires MethodCounters to exist before adding a method to
 907     // the queue. Create if we don't have them yet.
 908     method->get_method_counters(thread);
 909   }
 910 
 911   // Outputs from the following MutexLocker block:
 912   CompileTask* task     = NULL;
 913   CompileQueue* queue  = compile_queue(comp_level);
 914 
 915   // Acquire our lock.
 916   {
 917     MutexLocker locker(MethodCompileQueue_lock, thread);
 918 
 919     // Make sure the method has not slipped into the queues since
 920     // last we checked; note that those checks were "fast bail-outs".
 921     // Here we need to be more careful, see 14012000 below.
 922     if (compilation_is_in_queue(method)) {
 923       return;
 924     }
 925 
 926     // We need to check again to see if the compilation has
 927     // completed.  A previous compilation may have registered
 928     // some result.
 929     if (compilation_is_complete(method, osr_bci, comp_level)) {
 930       return;
 931     }
 932 
 933     // We now know that this compilation is not pending, complete,
 934     // or prohibited.  Assign a compile_id to this compilation
 935     // and check to see if it is in our [Start..Stop) range.
 936     int compile_id = assign_compile_id(method, osr_bci);
 937     if (compile_id == 0) {
 938       // The compilation falls outside the allowed range.
 939       return;
 940     }
 941 
 942 #if INCLUDE_JVMCI
 943     if (UseJVMCICompiler) {
 944       if (blocking) {
 945         // Don't allow blocking compiles for requests triggered by JVMCI.
 946         if (thread->is_Compiler_thread()) {
 947           blocking = false;
 948         }
 949 
 950         // Don't allow blocking compiles if inside a class initializer or while performing class loading
 951         vframeStream vfst((JavaThread*) thread);
 952         for (; !vfst.at_end(); vfst.next()) {
 953           if (vfst.method()->is_static_initializer() ||
 954               (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
 955                   vfst.method()->name() == vmSymbols::loadClass_name())) {
 956             blocking = false;
 957             break;
 958           }
 959         }
 960 
 961         // Don't allow blocking compilation requests to JVMCI
 962         // if JVMCI itself is not yet initialized
 963         if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
 964           blocking = false;
 965         }
 966 
 967         // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
 968         // to avoid deadlock between compiler thread(s) and threads run at shutdown
 969         // such as the DestroyJavaVM thread.
 970         if (JVMCIRuntime::shutdown_called()) {
 971           blocking = false;
 972         }
 973       }
 974     }
 975 #endif // INCLUDE_JVMCI
 976 
 977     // We will enter the compilation in the queue.
 978     // 14012000: Note that this sets the queued_for_compile bits in
 979     // the target method. We can now reason that a method cannot be
 980     // queued for compilation more than once, as follows:
 981     // Before a thread queues a task for compilation, it first acquires
 982     // the compile queue lock, then checks if the method's queued bits
 983     // are set or it has already been compiled. Thus there can not be two
 984     // instances of a compilation task for the same method on the
 985     // compilation queue. Consider now the case where the compilation
 986     // thread has already removed a task for that method from the queue
 987     // and is in the midst of compiling it. In this case, the
 988     // queued_for_compile bits must be set in the method (and these
 989     // will be visible to the current thread, since the bits were set
 990     // under protection of the compile queue lock, which we hold now.
 991     // When the compilation completes, the compiler thread first sets
 992     // the compilation result and then clears the queued_for_compile
 993     // bits. Neither of these actions are protected by a barrier (or done
 994     // under the protection of a lock), so the only guarantee we have
 995     // (on machines with TSO (Total Store Order)) is that these values
 996     // will update in that order. As a result, the only combinations of
 997     // these bits that the current thread will see are, in temporal order:
 998     // <RESULT, QUEUE> :
 999     //     <0, 1> : in compile queue, but not yet compiled
1000     //     <1, 1> : compiled but queue bit not cleared
1001     //     <1, 0> : compiled and queue bit cleared
1002     // Because we first check the queue bits then check the result bits,
1003     // we are assured that we cannot introduce a duplicate task.
1004     // Note that if we did the tests in the reverse order (i.e. check
1005     // result then check queued bit), we could get the result bit before
1006     // the compilation completed, and the queue bit after the compilation
1007     // completed, and end up introducing a "duplicate" (redundant) task.
1008     // In that case, the compiler thread should first check if a method
1009     // has already been compiled before trying to compile it.
1010     // NOTE: in the event that there are multiple compiler threads and
1011     // there is de-optimization/recompilation, things will get hairy,
1012     // and in that case it's best to protect both the testing (here) of
1013     // these bits, and their updating (here and elsewhere) under a
1014     // common lock.
1015     task = create_compile_task(queue,
1016                                compile_id, method,
1017                                osr_bci, comp_level,
1018                                hot_method, hot_count, compile_reason,
1019                                blocking);
1020   }
1021 
1022   if (blocking) {
1023     wait_for_completion(task);
1024   }
1025 }
1026 
1027 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1028                                        int comp_level,
1029                                        const methodHandle& hot_method, int hot_count,
1030                                        CompileTask::CompileReason compile_reason,
1031                                        Thread* THREAD) {
1032   // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1033   if (!_initialized || comp_level == CompLevel_none) {
1034     return NULL;
1035   }
1036 
1037   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1038   assert(comp != NULL, "Ensure we have a compiler");
1039 
1040   DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1041   nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1042   DirectivesStack::release(directive);
1043   return nm;
1044 }
1045 
1046 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1047                                          int comp_level,
1048                                          const methodHandle& hot_method, int hot_count,
1049                                          CompileTask::CompileReason compile_reason,
1050                                          DirectiveSet* directive,
1051                                          Thread* THREAD) {
1052 
1053   // make sure arguments make sense
1054   assert(method->method_holder()->is_instance_klass(), "not an instance method");
1055   assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1056   assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1057   assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1058   assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1059   // allow any levels for WhiteBox
1060   assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1061   // return quickly if possible
1062 
1063   // lock, make sure that the compilation
1064   // isn't prohibited in a straightforward way.
1065   AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1066   if (comp == NULL || !comp->can_compile_method(method) ||
1067       compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1068     return NULL;
1069   }
1070 
1071 #if INCLUDE_JVMCI
1072   if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1073     return NULL;
1074   }
1075 #endif
1076 
1077   if (osr_bci == InvocationEntryBci) {
1078     // standard compilation
1079     CompiledMethod* method_code = method->code();
1080     if (method_code != NULL && method_code->is_nmethod()) {
1081       if (compilation_is_complete(method, osr_bci, comp_level)) {
1082         return (nmethod*) method_code;
1083       }
1084     }
1085     if (method->is_not_compilable(comp_level)) {
1086       return NULL;
1087     }
1088   } else {
1089     // osr compilation
1090 #ifndef TIERED
1091     // seems like an assert of dubious value
1092     assert(comp_level == CompLevel_highest_tier,
1093            "all OSR compiles are assumed to be at a single compilation level");
1094 #endif // TIERED
1095     // We accept a higher level osr method
1096     nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1097     if (nm != NULL) return nm;
1098     if (method->is_not_osr_compilable(comp_level)) return NULL;
1099   }
1100 
1101   assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1102   // some prerequisites that are compiler specific
1103   if (comp->is_c2() || comp->is_shark()) {
1104     method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1105     // Resolve all classes seen in the signature of the method
1106     // we are compiling.
1107     Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1108   }
1109 
1110   // If the method is native, do the lookup in the thread requesting
1111   // the compilation. Native lookups can load code, which is not
1112   // permitted during compilation.
1113   //
1114   // Note: A native method implies non-osr compilation which is
1115   //       checked with an assertion at the entry of this method.
1116   if (method->is_native() && !method->is_method_handle_intrinsic()) {
1117     bool in_base_library;
1118     address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1119     if (HAS_PENDING_EXCEPTION) {
1120       // In case of an exception looking up the method, we just forget
1121       // about it. The interpreter will kick-in and throw the exception.
1122       method->set_not_compilable(); // implies is_not_osr_compilable()
1123       CLEAR_PENDING_EXCEPTION;
1124       return NULL;
1125     }
1126     assert(method->has_native_function(), "must have native code by now");
1127   }
1128 
1129   // RedefineClasses() has replaced this method; just return
1130   if (method->is_old()) {
1131     return NULL;
1132   }
1133 
1134   // JVMTI -- post_compile_event requires jmethod_id() that may require
1135   // a lock the compiling thread can not acquire. Prefetch it here.
1136   if (JvmtiExport::should_post_compiled_method_load()) {
1137     method->jmethod_id();
1138   }
1139 
1140   // do the compilation
1141   if (method->is_native()) {
1142     if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1143       // The following native methods:
1144       //
1145       // java.lang.Float.intBitsToFloat
1146       // java.lang.Float.floatToRawIntBits
1147       // java.lang.Double.longBitsToDouble
1148       // java.lang.Double.doubleToRawLongBits
1149       //
1150       // are called through the interpreter even if interpreter native stubs
1151       // are not preferred (i.e., calling through adapter handlers is preferred).
1152       // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1153       // if the version of the methods from the native libraries is called.
1154       // As the interpreter and the C2-intrinsified version of the methods preserves
1155       // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1156       if ((UseSSE >= 1 &&
1157           (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1158            method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1159           (UseSSE >= 2 &&
1160            (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1161             method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1162         return NULL;
1163       }
1164 
1165       // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1166       // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1167       //
1168       // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1169       // in this case.  If we can't generate one and use it we can not execute the out-of-line method handle calls.
1170       AdapterHandlerLibrary::create_native_wrapper(method);
1171     } else {
1172       return NULL;
1173     }
1174   } else {
1175     // If the compiler is shut off due to code cache getting full
1176     // fail out now so blocking compiles dont hang the java thread
1177     if (!should_compile_new_jobs()) {
1178       CompilationPolicy::policy()->delay_compilation(method());
1179       return NULL;
1180     }
1181     bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1182     compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1183   }
1184 
1185   // return requested nmethod
1186   // We accept a higher level osr method
1187   if (osr_bci == InvocationEntryBci) {
1188     CompiledMethod* code = method->code();
1189     if (code == NULL) {
1190       return (nmethod*) code;
1191     } else {
1192       return code->as_nmethod_or_null();
1193     }
1194   }
1195   return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1196 }
1197 
1198 
1199 // ------------------------------------------------------------------
1200 // CompileBroker::compilation_is_complete
1201 //
1202 // See if compilation of this method is already complete.
1203 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1204                                             int                 osr_bci,
1205                                             int                 comp_level) {
1206   bool is_osr = (osr_bci != standard_entry_bci);
1207   if (is_osr) {
1208     if (method->is_not_osr_compilable(comp_level)) {
1209       return true;
1210     } else {
1211       nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1212       return (result != NULL);
1213     }
1214   } else {
1215     if (method->is_not_compilable(comp_level)) {
1216       return true;
1217     } else {
1218       CompiledMethod* result = method->code();
1219       if (result == NULL) return false;
1220       return comp_level == result->comp_level();
1221     }
1222   }
1223 }
1224 
1225 
1226 /**
1227  * See if this compilation is already requested.
1228  *
1229  * Implementation note: there is only a single "is in queue" bit
1230  * for each method.  This means that the check below is overly
1231  * conservative in the sense that an osr compilation in the queue
1232  * will block a normal compilation from entering the queue (and vice
1233  * versa).  This can be remedied by a full queue search to disambiguate
1234  * cases.  If it is deemed profitable, this may be done.
1235  */
1236 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1237   return method->queued_for_compilation();
1238 }
1239 
1240 // ------------------------------------------------------------------
1241 // CompileBroker::compilation_is_prohibited
1242 //
1243 // See if this compilation is not allowed.
1244 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1245   bool is_native = method->is_native();
1246   // Some compilers may not support the compilation of natives.
1247   AbstractCompiler *comp = compiler(comp_level);
1248   if (is_native &&
1249       (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1250     method->set_not_compilable_quietly(comp_level);
1251     return true;
1252   }
1253 
1254   bool is_osr = (osr_bci != standard_entry_bci);
1255   // Some compilers may not support on stack replacement.
1256   if (is_osr &&
1257       (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1258     method->set_not_osr_compilable(comp_level);
1259     return true;
1260   }
1261 
1262   // The method may be explicitly excluded by the user.
1263   double scale;
1264   if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1265     bool quietly = CompilerOracle::should_exclude_quietly();
1266     if (PrintCompilation && !quietly) {
1267       // This does not happen quietly...
1268       ResourceMark rm;
1269       tty->print("### Excluding %s:%s",
1270                  method->is_native() ? "generation of native wrapper" : "compile",
1271                  (method->is_static() ? " static" : ""));
1272       method->print_short_name(tty);
1273       tty->cr();
1274     }
1275     method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1276   }
1277 
1278   return false;
1279 }
1280 
1281 /**
1282  * Generate serialized IDs for compilation requests. If certain debugging flags are used
1283  * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1284  * The function also allows to generate separate compilation IDs for OSR compilations.
1285  */
1286 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1287 #ifdef ASSERT
1288   bool is_osr = (osr_bci != standard_entry_bci);
1289   int id;
1290   if (method->is_native()) {
1291     assert(!is_osr, "can't be osr");
1292     // Adapters, native wrappers and method handle intrinsics
1293     // should be generated always.
1294     return Atomic::add(1, &_compilation_id);
1295   } else if (CICountOSR && is_osr) {
1296     id = Atomic::add(1, &_osr_compilation_id);
1297     if (CIStartOSR <= id && id < CIStopOSR) {
1298       return id;
1299     }
1300   } else {
1301     id = Atomic::add(1, &_compilation_id);
1302     if (CIStart <= id && id < CIStop) {
1303       return id;
1304     }
1305   }
1306 
1307   // Method was not in the appropriate compilation range.
1308   method->set_not_compilable_quietly();
1309   return 0;
1310 #else
1311   // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1312   // only _compilation_id is incremented.
1313   return Atomic::add(1, &_compilation_id);
1314 #endif
1315 }
1316 
1317 // ------------------------------------------------------------------
1318 // CompileBroker::assign_compile_id_unlocked
1319 //
1320 // Public wrapper for assign_compile_id that acquires the needed locks
1321 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1322   MutexLocker locker(MethodCompileQueue_lock, thread);
1323   return assign_compile_id(method, osr_bci);
1324 }
1325 
1326 // ------------------------------------------------------------------
1327 // CompileBroker::preload_classes
1328 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1329   // Move this code over from c1_Compiler.cpp
1330   ShouldNotReachHere();
1331 }
1332 
1333 
1334 // ------------------------------------------------------------------
1335 // CompileBroker::create_compile_task
1336 //
1337 // Create a CompileTask object representing the current request for
1338 // compilation.  Add this task to the queue.
1339 CompileTask* CompileBroker::create_compile_task(CompileQueue*       queue,
1340                                                 int                 compile_id,
1341                                                 const methodHandle& method,
1342                                                 int                 osr_bci,
1343                                                 int                 comp_level,
1344                                                 const methodHandle& hot_method,
1345                                                 int                 hot_count,
1346                                                 CompileTask::CompileReason compile_reason,
1347                                                 bool                blocking) {
1348   CompileTask* new_task = CompileTask::allocate();
1349   new_task->initialize(compile_id, method, osr_bci, comp_level,
1350                        hot_method, hot_count, compile_reason,
1351                        blocking);
1352   queue->add(new_task);
1353   return new_task;
1354 }
1355 
1356 #if INCLUDE_JVMCI
1357 // The number of milliseconds to wait before checking if
1358 // JVMCI compilation has made progress.
1359 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500;
1360 
1361 // The number of JVMCI compilation progress checks that must fail
1362 // before unblocking a thread waiting for a blocking compilation.
1363 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5;
1364 
1365 /**
1366  * Waits for a JVMCI compiler to complete a given task. This thread
1367  * waits until either the task completes or it sees no JVMCI compilation
1368  * progress for N consecutive milliseconds where N is
1369  * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1370  * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1371  *
1372  * @return true if this thread needs to free/recycle the task
1373  */
1374 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1375   MutexLocker waiter(task->lock(), thread);
1376   int progress_wait_attempts = 0;
1377   int methods_compiled = jvmci->methods_compiled();
1378   while (!task->is_complete() && !is_compilation_disabled_forever() &&
1379          task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1380     CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1381 
1382     bool progress;
1383     if (jvmci_compiler_thread != NULL) {
1384       // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1385       progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1386     } else {
1387       // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1388       // that all JVMCI compiler threads are blocked on. We use the counter for
1389       // successful JVMCI compilations to determine whether JVMCI compilation
1390       // is still making progress through the JVMCI compiler queue.
1391       progress = jvmci->methods_compiled() != methods_compiled;
1392     }
1393 
1394     if (!progress) {
1395       if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1396         if (PrintCompilation) {
1397           task->print(tty, "wait for blocking compilation timed out");
1398         }
1399         break;
1400       }
1401     } else {
1402       progress_wait_attempts = 0;
1403       if (jvmci_compiler_thread == NULL) {
1404         methods_compiled = jvmci->methods_compiled();
1405       }
1406     }
1407   }
1408   task->clear_waiter();
1409   return task->is_complete();
1410 }
1411 #endif
1412 
1413 /**
1414  *  Wait for the compilation task to complete.
1415  */
1416 void CompileBroker::wait_for_completion(CompileTask* task) {
1417   if (CIPrintCompileQueue) {
1418     ttyLocker ttyl;
1419     tty->print_cr("BLOCKING FOR COMPILE");
1420   }
1421 
1422   assert(task->is_blocking(), "can only wait on blocking task");
1423 
1424   JavaThread* thread = JavaThread::current();
1425   thread->set_blocked_on_compilation(true);
1426 
1427   methodHandle method(thread, task->method());
1428   bool free_task;
1429 #if INCLUDE_JVMCI
1430   AbstractCompiler* comp = compiler(task->comp_level());
1431   if (comp->is_jvmci()) {
1432     free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1433   } else
1434 #endif
1435   {
1436     MutexLocker waiter(task->lock(), thread);
1437     free_task = true;
1438     while (!task->is_complete() && !is_compilation_disabled_forever()) {
1439       task->lock()->wait();
1440     }
1441   }
1442 
1443   thread->set_blocked_on_compilation(false);
1444   if (free_task) {
1445     if (is_compilation_disabled_forever()) {
1446       CompileTask::free(task);
1447       return;
1448     }
1449 
1450     // It is harmless to check this status without the lock, because
1451     // completion is a stable property (until the task object is recycled).
1452     assert(task->is_complete(), "Compilation should have completed");
1453     assert(task->code_handle() == NULL, "must be reset");
1454 
1455     // By convention, the waiter is responsible for recycling a
1456     // blocking CompileTask. Since there is only one waiter ever
1457     // waiting on a CompileTask, we know that no one else will
1458     // be using this CompileTask; we can free it.
1459     CompileTask::free(task);
1460   }
1461 }
1462 
1463 /**
1464  * Initialize compiler thread(s) + compiler object(s). The postcondition
1465  * of this function is that the compiler runtimes are initialized and that
1466  * compiler threads can start compiling.
1467  */
1468 bool CompileBroker::init_compiler_runtime() {
1469   CompilerThread* thread = CompilerThread::current();
1470   AbstractCompiler* comp = thread->compiler();
1471   // Final sanity check - the compiler object must exist
1472   guarantee(comp != NULL, "Compiler object must exist");
1473 
1474   int system_dictionary_modification_counter;
1475   {
1476     MutexLocker locker(Compile_lock, thread);
1477     system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1478   }
1479 
1480   {
1481     // Must switch to native to allocate ci_env
1482     ThreadToNativeFromVM ttn(thread);
1483     ciEnv ci_env(NULL, system_dictionary_modification_counter);
1484     // Cache Jvmti state
1485     ci_env.cache_jvmti_state();
1486     // Cache DTrace flags
1487     ci_env.cache_dtrace_flags();
1488 
1489     // Switch back to VM state to do compiler initialization
1490     ThreadInVMfromNative tv(thread);
1491     ResetNoHandleMark rnhm;
1492 
1493     if (!comp->is_shark()) {
1494       // Perform per-thread and global initializations
1495       comp->initialize();
1496     }
1497   }
1498 
1499   if (comp->is_failed()) {
1500     disable_compilation_forever();
1501     // If compiler initialization failed, no compiler thread that is specific to a
1502     // particular compiler runtime will ever start to compile methods.
1503     shutdown_compiler_runtime(comp, thread);
1504     return false;
1505   }
1506 
1507   // C1 specific check
1508   if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1509     warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1510     return false;
1511   }
1512 
1513   return true;
1514 }
1515 
1516 /**
1517  * If C1 and/or C2 initialization failed, we shut down all compilation.
1518  * We do this to keep things simple. This can be changed if it ever turns
1519  * out to be a problem.
1520  */
1521 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1522   // Free buffer blob, if allocated
1523   if (thread->get_buffer_blob() != NULL) {
1524     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1525     CodeCache::free(thread->get_buffer_blob());
1526   }
1527 
1528   if (comp->should_perform_shutdown()) {
1529     // There are two reasons for shutting down the compiler
1530     // 1) compiler runtime initialization failed
1531     // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1532     warning("%s initialization failed. Shutting down all compilers", comp->name());
1533 
1534     // Only one thread per compiler runtime object enters here
1535     // Set state to shut down
1536     comp->set_shut_down();
1537 
1538     // Delete all queued compilation tasks to make compiler threads exit faster.
1539     if (_c1_compile_queue != NULL) {
1540       _c1_compile_queue->free_all();
1541     }
1542 
1543     if (_c2_compile_queue != NULL) {
1544       _c2_compile_queue->free_all();
1545     }
1546 
1547     // Set flags so that we continue execution with using interpreter only.
1548     UseCompiler    = false;
1549     UseInterpreter = true;
1550 
1551     // We could delete compiler runtimes also. However, there are references to
1552     // the compiler runtime(s) (e.g.,  nmethod::is_compiled_by_c1()) which then
1553     // fail. This can be done later if necessary.
1554   }
1555 }
1556 
1557 // ------------------------------------------------------------------
1558 // CompileBroker::compiler_thread_loop
1559 //
1560 // The main loop run by a CompilerThread.
1561 void CompileBroker::compiler_thread_loop() {
1562   CompilerThread* thread = CompilerThread::current();
1563   CompileQueue* queue = thread->queue();
1564   // For the thread that initializes the ciObjectFactory
1565   // this resource mark holds all the shared objects
1566   ResourceMark rm;
1567 
1568   // First thread to get here will initialize the compiler interface
1569 
1570   {
1571     ASSERT_IN_VM;
1572     MutexLocker only_one (CompileThread_lock, thread);
1573     if (!ciObjectFactory::is_initialized()) {
1574       ciObjectFactory::initialize();
1575     }
1576   }
1577 
1578   // Open a log.
1579   if (LogCompilation) {
1580     init_compiler_thread_log();
1581   }
1582   CompileLog* log = thread->log();
1583   if (log != NULL) {
1584     log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1585                     thread->name(),
1586                     os::current_thread_id(),
1587                     os::current_process_id());
1588     log->stamp();
1589     log->end_elem();
1590   }
1591 
1592   // If compiler thread/runtime initialization fails, exit the compiler thread
1593   if (!init_compiler_runtime()) {
1594     return;
1595   }
1596 
1597   // Poll for new compilation tasks as long as the JVM runs. Compilation
1598   // should only be disabled if something went wrong while initializing the
1599   // compiler runtimes. This, in turn, should not happen. The only known case
1600   // when compiler runtime initialization fails is if there is not enough free
1601   // space in the code cache to generate the necessary stubs, etc.
1602   while (!is_compilation_disabled_forever()) {
1603     // We need this HandleMark to avoid leaking VM handles.
1604     HandleMark hm(thread);
1605 
1606     CompileTask* task = queue->get();
1607     if (task == NULL) {
1608       continue;
1609     }
1610 
1611     // Give compiler threads an extra quanta.  They tend to be bursty and
1612     // this helps the compiler to finish up the job.
1613     if (CompilerThreadHintNoPreempt) {
1614       os::hint_no_preempt();
1615     }
1616 
1617     // Assign the task to the current thread.  Mark this compilation
1618     // thread as active for the profiler.
1619     CompileTaskWrapper ctw(task);
1620     nmethodLocker result_handle;  // (handle for the nmethod produced by this task)
1621     task->set_code_handle(&result_handle);
1622     methodHandle method(thread, task->method());
1623 
1624     // Never compile a method if breakpoints are present in it
1625     if (method()->number_of_breakpoints() == 0) {
1626       // Compile the method.
1627       if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1628         invoke_compiler_on_method(task);
1629       } else {
1630         // After compilation is disabled, remove remaining methods from queue
1631         method->clear_queued_for_compilation();
1632         task->set_failure_reason("compilation is disabled");
1633       }
1634     }
1635   }
1636 
1637   // Shut down compiler runtime
1638   shutdown_compiler_runtime(thread->compiler(), thread);
1639 }
1640 
1641 // ------------------------------------------------------------------
1642 // CompileBroker::init_compiler_thread_log
1643 //
1644 // Set up state required by +LogCompilation.
1645 void CompileBroker::init_compiler_thread_log() {
1646     CompilerThread* thread = CompilerThread::current();
1647     char  file_name[4*K];
1648     FILE* fp = NULL;
1649     intx thread_id = os::current_thread_id();
1650     for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1651       const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1652       if (dir == NULL) {
1653         jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1654                      thread_id, os::current_process_id());
1655       } else {
1656         jio_snprintf(file_name, sizeof(file_name),
1657                      "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1658                      os::file_separator(), thread_id, os::current_process_id());
1659       }
1660 
1661       fp = fopen(file_name, "wt");
1662       if (fp != NULL) {
1663         if (LogCompilation && Verbose) {
1664           tty->print_cr("Opening compilation log %s", file_name);
1665         }
1666         CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1667         if (log == NULL) {
1668           fclose(fp);
1669           return;
1670         }
1671         thread->init_log(log);
1672 
1673         if (xtty != NULL) {
1674           ttyLocker ttyl;
1675           // Record any per thread log files
1676           xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1677         }
1678         return;
1679       }
1680     }
1681     warning("Cannot open log file: %s", file_name);
1682 }
1683 
1684 void CompileBroker::log_metaspace_failure() {
1685   const char* message = "some methods may not be compiled because metaspace "
1686                         "is out of memory";
1687   if (_compilation_log != NULL) {
1688     _compilation_log->log_metaspace_failure(message);
1689   }
1690   if (PrintCompilation) {
1691     tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1692   }
1693 }
1694 
1695 
1696 // ------------------------------------------------------------------
1697 // CompileBroker::set_should_block
1698 //
1699 // Set _should_block.
1700 // Call this from the VM, with Threads_lock held and a safepoint requested.
1701 void CompileBroker::set_should_block() {
1702   assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1703   assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1704 #ifndef PRODUCT
1705   if (PrintCompilation && (Verbose || WizardMode))
1706     tty->print_cr("notifying compiler thread pool to block");
1707 #endif
1708   _should_block = true;
1709 }
1710 
1711 // ------------------------------------------------------------------
1712 // CompileBroker::maybe_block
1713 //
1714 // Call this from the compiler at convenient points, to poll for _should_block.
1715 void CompileBroker::maybe_block() {
1716   if (_should_block) {
1717 #ifndef PRODUCT
1718     if (PrintCompilation && (Verbose || WizardMode))
1719       tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1720 #endif
1721     ThreadInVMfromNative tivfn(JavaThread::current());
1722   }
1723 }
1724 
1725 // wrapper for CodeCache::print_summary()
1726 static void codecache_print(bool detailed)
1727 {
1728   ResourceMark rm;
1729   stringStream s;
1730   // Dump code cache  into a buffer before locking the tty,
1731   {
1732     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1733     CodeCache::print_summary(&s, detailed);
1734   }
1735   ttyLocker ttyl;
1736   tty->print("%s", s.as_string());
1737 }
1738 
1739 // wrapper for CodeCache::print_summary() using outputStream
1740 static void codecache_print(outputStream* out, bool detailed) {
1741   ResourceMark rm;
1742   stringStream s;
1743 
1744   // Dump code cache into a buffer
1745   {
1746     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1747     CodeCache::print_summary(&s, detailed);
1748   }
1749 
1750   char* remaining_log = s.as_string();
1751   while (*remaining_log != '\0') {
1752     char* eol = strchr(remaining_log, '\n');
1753     if (eol == NULL) {
1754       out->print_cr("%s", remaining_log);
1755       remaining_log = remaining_log + strlen(remaining_log);
1756     } else {
1757       *eol = '\0';
1758       out->print_cr("%s", remaining_log);
1759       remaining_log = eol + 1;
1760     }
1761   }
1762 }
1763 
1764 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1765 
1766   if (success) {
1767     task->mark_success();
1768     if (ci_env != NULL) {
1769       task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1770     }
1771     if (_compilation_log != NULL) {
1772       nmethod* code = task->code();
1773       if (code != NULL) {
1774         _compilation_log->log_nmethod(thread, code);
1775       }
1776     }
1777   }
1778 
1779   // simulate crash during compilation
1780   assert(task->compile_id() != CICrashAt, "just as planned");
1781   if (event.should_commit()) {
1782     event.set_method(task->method());
1783     event.set_compileId(task->compile_id());
1784     event.set_compileLevel(task->comp_level());
1785     event.set_succeded(task->is_success());
1786     event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1787     event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1788     event.set_inlinedBytes(task->num_inlined_bytecodes());
1789     event.commit();
1790   }
1791 }
1792 
1793 int DirectivesStack::_depth = 0;
1794 CompilerDirectives* DirectivesStack::_top = NULL;
1795 CompilerDirectives* DirectivesStack::_bottom = NULL;
1796 
1797 // ------------------------------------------------------------------
1798 // CompileBroker::invoke_compiler_on_method
1799 //
1800 // Compile a method.
1801 //
1802 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1803   task->print_ul();
1804   if (PrintCompilation) {
1805     ResourceMark rm;
1806     task->print_tty();
1807   }
1808   elapsedTimer time;
1809 
1810   CompilerThread* thread = CompilerThread::current();
1811   ResourceMark rm(thread);
1812 
1813   if (LogEvents) {
1814     _compilation_log->log_compile(thread, task);
1815   }
1816 
1817   // Common flags.
1818   uint compile_id = task->compile_id();
1819   int osr_bci = task->osr_bci();
1820   bool is_osr = (osr_bci != standard_entry_bci);
1821   bool should_log = (thread->log() != NULL);
1822   bool should_break = false;
1823   const int task_level = task->comp_level();
1824   AbstractCompiler* comp = task->compiler();
1825 
1826   DirectiveSet* directive;
1827   {
1828     // create the handle inside it's own block so it can't
1829     // accidentally be referenced once the thread transitions to
1830     // native.  The NoHandleMark before the transition should catch
1831     // any cases where this occurs in the future.
1832     methodHandle method(thread, task->method());
1833     assert(!method->is_native(), "no longer compile natives");
1834 
1835     // Look up matching directives
1836     directive = DirectivesStack::getMatchingDirective(method, comp);
1837 
1838     // Save information about this method in case of failure.
1839     set_last_compile(thread, method, is_osr, task_level);
1840 
1841     DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1842   }
1843 
1844   should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1845   if (should_log && !directive->LogOption) {
1846     should_log = false;
1847   }
1848 
1849   // Allocate a new set of JNI handles.
1850   push_jni_handle_block();
1851   Method* target_handle = task->method();
1852   int compilable = ciEnv::MethodCompilable;
1853   const char* failure_reason = NULL;
1854   const char* retry_message = NULL;
1855 
1856   int system_dictionary_modification_counter;
1857   {
1858     MutexLocker locker(Compile_lock, thread);
1859     system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1860   }
1861 
1862 #if INCLUDE_JVMCI
1863   if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1864     JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1865 
1866     TraceTime t1("compilation", &time);
1867     EventCompilation event;
1868 
1869     JVMCIEnv env(task, system_dictionary_modification_counter);
1870     methodHandle method(thread, target_handle);
1871     jvmci->compile_method(method, osr_bci, &env);
1872 
1873     post_compile(thread, task, event, task->code() != NULL, NULL);
1874 
1875     failure_reason = env.failure_reason();
1876     if (!env.retryable()) {
1877       retry_message = "not retryable";
1878       compilable = ciEnv::MethodCompilable_not_at_tier;
1879     }
1880 
1881   } else
1882 #endif // INCLUDE_JVMCI
1883   {
1884     NoHandleMark  nhm;
1885     ThreadToNativeFromVM ttn(thread);
1886 
1887     ciEnv ci_env(task, system_dictionary_modification_counter);
1888     if (should_break) {
1889       ci_env.set_break_at_compile(true);
1890     }
1891     if (should_log) {
1892       ci_env.set_log(thread->log());
1893     }
1894     assert(thread->env() == &ci_env, "set by ci_env");
1895     // The thread-env() field is cleared in ~CompileTaskWrapper.
1896 
1897     // Cache Jvmti state
1898     ci_env.cache_jvmti_state();
1899 
1900     // Cache DTrace flags
1901     ci_env.cache_dtrace_flags();
1902 
1903     ciMethod* target = ci_env.get_method_from_handle(target_handle);
1904 
1905     TraceTime t1("compilation", &time);
1906     EventCompilation event;
1907 
1908     if (comp == NULL) {
1909       ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1910     } else {
1911       if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1912         MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1913         while (WhiteBox::compilation_locked) {
1914           locker.wait(Mutex::_no_safepoint_check_flag);
1915         }
1916       }
1917       comp->compile_method(&ci_env, target, osr_bci, directive);
1918     }
1919 
1920     if (!ci_env.failing() && task->code() == NULL) {
1921       //assert(false, "compiler should always document failure");
1922       // The compiler elected, without comment, not to register a result.
1923       // Do not attempt further compilations of this method.
1924       ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1925     }
1926 
1927     // Copy this bit to the enclosing block:
1928     compilable = ci_env.compilable();
1929 
1930     if (ci_env.failing()) {
1931       failure_reason = ci_env.failure_reason();
1932       retry_message = ci_env.retry_message();
1933       ci_env.report_failure(failure_reason);
1934     }
1935 
1936     post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1937   }
1938   // Remove the JNI handle block after the ciEnv destructor has run in
1939   // the previous block.
1940   pop_jni_handle_block();
1941 
1942   if (failure_reason != NULL) {
1943     task->set_failure_reason(failure_reason);
1944     if (_compilation_log != NULL) {
1945       _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1946     }
1947     if (PrintCompilation) {
1948       FormatBufferResource msg = retry_message != NULL ?
1949         FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1950         FormatBufferResource("COMPILE SKIPPED: %s",      failure_reason);
1951       task->print(tty, msg);
1952     }
1953   }
1954 
1955   methodHandle method(thread, task->method());
1956 
1957   DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1958 
1959   collect_statistics(thread, time, task);
1960 
1961   nmethod* nm = task->code();
1962   if (nm != NULL) {
1963     nm->maybe_print_nmethod(directive);
1964   }
1965   DirectivesStack::release(directive);
1966 
1967   if (PrintCompilation && PrintCompilation2) {
1968     tty->print("%7d ", (int) tty->time_stamp().milliseconds());  // print timestamp
1969     tty->print("%4d ", compile_id);    // print compilation number
1970     tty->print("%s ", (is_osr ? "%" : " "));
1971     if (task->code() != NULL) {
1972       tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1973     }
1974     tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1975   }
1976 
1977   Log(compilation, codecache) log;
1978   if (log.is_debug()) {
1979     LogStream ls(log.debug());
1980     codecache_print(&ls, /* detailed= */ false);
1981   }
1982   if (PrintCodeCacheOnCompilation) {
1983     codecache_print(/* detailed= */ false);
1984   }
1985   // Disable compilation, if required.
1986   switch (compilable) {
1987   case ciEnv::MethodCompilable_never:
1988     if (is_osr)
1989       method->set_not_osr_compilable_quietly();
1990     else
1991       method->set_not_compilable_quietly();
1992     break;
1993   case ciEnv::MethodCompilable_not_at_tier:
1994     if (is_osr)
1995       method->set_not_osr_compilable_quietly(task_level);
1996     else
1997       method->set_not_compilable_quietly(task_level);
1998     break;
1999   }
2000 
2001   // Note that the queued_for_compilation bits are cleared without
2002   // protection of a mutex. [They were set by the requester thread,
2003   // when adding the task to the compile queue -- at which time the
2004   // compile queue lock was held. Subsequently, we acquired the compile
2005   // queue lock to get this task off the compile queue; thus (to belabour
2006   // the point somewhat) our clearing of the bits must be occurring
2007   // only after the setting of the bits. See also 14012000 above.
2008   method->clear_queued_for_compilation();
2009 
2010 #ifdef ASSERT
2011   if (CollectedHeap::fired_fake_oom()) {
2012     // The current compile received a fake OOM during compilation so
2013     // go ahead and exit the VM since the test apparently succeeded
2014     tty->print_cr("*** Shutting down VM after successful fake OOM");
2015     vm_exit(0);
2016   }
2017 #endif
2018 }
2019 
2020 /**
2021  * The CodeCache is full. Print warning and disable compilation.
2022  * Schedule code cache cleaning so compilation can continue later.
2023  * This function needs to be called only from CodeCache::allocate(),
2024  * since we currently handle a full code cache uniformly.
2025  */
2026 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2027   UseInterpreter = true;
2028   if (UseCompiler || AlwaysCompileLoopMethods ) {
2029     if (xtty != NULL) {
2030       ResourceMark rm;
2031       stringStream s;
2032       // Dump code cache state into a buffer before locking the tty,
2033       // because log_state() will use locks causing lock conflicts.
2034       CodeCache::log_state(&s);
2035       // Lock to prevent tearing
2036       ttyLocker ttyl;
2037       xtty->begin_elem("code_cache_full");
2038       xtty->print("%s", s.as_string());
2039       xtty->stamp();
2040       xtty->end_elem();
2041     }
2042 
2043 #ifndef PRODUCT
2044     if (CompileTheWorld || ExitOnFullCodeCache) {
2045       codecache_print(/* detailed= */ true);
2046       before_exit(JavaThread::current());
2047       exit_globals(); // will delete tty
2048       vm_direct_exit(CompileTheWorld ? 0 : 1);
2049     }
2050 #endif
2051     if (UseCodeCacheFlushing) {
2052       // Since code cache is full, immediately stop new compiles
2053       if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2054         NMethodSweeper::log_sweep("disable_compiler");
2055       }
2056     } else {
2057       disable_compilation_forever();
2058     }
2059 
2060     CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2061   }
2062 }
2063 
2064 // ------------------------------------------------------------------
2065 // CompileBroker::set_last_compile
2066 //
2067 // Record this compilation for debugging purposes.
2068 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2069   ResourceMark rm;
2070   char* method_name = method->name()->as_C_string();
2071   strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2072   _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2073   char current_method[CompilerCounters::cmname_buffer_length];
2074   size_t maxLen = CompilerCounters::cmname_buffer_length;
2075 
2076   if (UsePerfData) {
2077     const char* class_name = method->method_holder()->name()->as_C_string();
2078 
2079     size_t s1len = strlen(class_name);
2080     size_t s2len = strlen(method_name);
2081 
2082     // check if we need to truncate the string
2083     if (s1len + s2len + 2 > maxLen) {
2084 
2085       // the strategy is to lop off the leading characters of the
2086       // class name and the trailing characters of the method name.
2087 
2088       if (s2len + 2 > maxLen) {
2089         // lop of the entire class name string, let snprintf handle
2090         // truncation of the method name.
2091         class_name += s1len; // null string
2092       }
2093       else {
2094         // lop off the extra characters from the front of the class name
2095         class_name += ((s1len + s2len + 2) - maxLen);
2096       }
2097     }
2098 
2099     jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2100   }
2101 
2102   if (CICountOSR && is_osr) {
2103     _last_compile_type = osr_compile;
2104   } else {
2105     _last_compile_type = normal_compile;
2106   }
2107   _last_compile_level = comp_level;
2108 
2109   if (UsePerfData) {
2110     CompilerCounters* counters = thread->counters();
2111     counters->set_current_method(current_method);
2112     counters->set_compile_type((jlong)_last_compile_type);
2113   }
2114 }
2115 
2116 
2117 // ------------------------------------------------------------------
2118 // CompileBroker::push_jni_handle_block
2119 //
2120 // Push on a new block of JNI handles.
2121 void CompileBroker::push_jni_handle_block() {
2122   JavaThread* thread = JavaThread::current();
2123 
2124   // Allocate a new block for JNI handles.
2125   // Inlined code from jni_PushLocalFrame()
2126   JNIHandleBlock* java_handles = thread->active_handles();
2127   JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2128   assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2129   compile_handles->set_pop_frame_link(java_handles);  // make sure java handles get gc'd.
2130   thread->set_active_handles(compile_handles);
2131 }
2132 
2133 
2134 // ------------------------------------------------------------------
2135 // CompileBroker::pop_jni_handle_block
2136 //
2137 // Pop off the current block of JNI handles.
2138 void CompileBroker::pop_jni_handle_block() {
2139   JavaThread* thread = JavaThread::current();
2140 
2141   // Release our JNI handle block
2142   JNIHandleBlock* compile_handles = thread->active_handles();
2143   JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2144   thread->set_active_handles(java_handles);
2145   compile_handles->set_pop_frame_link(NULL);
2146   JNIHandleBlock::release_block(compile_handles, thread); // may block
2147 }
2148 
2149 // ------------------------------------------------------------------
2150 // CompileBroker::collect_statistics
2151 //
2152 // Collect statistics about the compilation.
2153 
2154 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2155   bool success = task->is_success();
2156   methodHandle method (thread, task->method());
2157   uint compile_id = task->compile_id();
2158   bool is_osr = (task->osr_bci() != standard_entry_bci);
2159   nmethod* code = task->code();
2160   CompilerCounters* counters = thread->counters();
2161 
2162   assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2163   MutexLocker locker(CompileStatistics_lock);
2164 
2165   // _perf variables are production performance counters which are
2166   // updated regardless of the setting of the CITime and CITimeEach flags
2167   //
2168 
2169   // account all time, including bailouts and failures in this counter;
2170   // C1 and C2 counters are counting both successful and unsuccessful compiles
2171   _t_total_compilation.add(time);
2172 
2173   if (!success) {
2174     _total_bailout_count++;
2175     if (UsePerfData) {
2176       _perf_last_failed_method->set_value(counters->current_method());
2177       _perf_last_failed_type->set_value(counters->compile_type());
2178       _perf_total_bailout_count->inc();
2179     }
2180     _t_bailedout_compilation.add(time);
2181   } else if (code == NULL) {
2182     if (UsePerfData) {
2183       _perf_last_invalidated_method->set_value(counters->current_method());
2184       _perf_last_invalidated_type->set_value(counters->compile_type());
2185       _perf_total_invalidated_count->inc();
2186     }
2187     _total_invalidated_count++;
2188     _t_invalidated_compilation.add(time);
2189   } else {
2190     // Compilation succeeded
2191 
2192     // update compilation ticks - used by the implementation of
2193     // java.lang.management.CompilationMBean
2194     _perf_total_compilation->inc(time.ticks());
2195     _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2196 
2197     if (CITime) {
2198       int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2199       if (is_osr) {
2200         _t_osr_compilation.add(time);
2201         _sum_osr_bytes_compiled += bytes_compiled;
2202       } else {
2203         _t_standard_compilation.add(time);
2204         _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2205       }
2206 
2207 #if INCLUDE_JVMCI
2208       AbstractCompiler* comp = compiler(task->comp_level());
2209       if (comp) {
2210         CompilerStatistics* stats = comp->stats();
2211         if (stats) {
2212           if (is_osr) {
2213             stats->_osr.update(time, bytes_compiled);
2214           } else {
2215             stats->_standard.update(time, bytes_compiled);
2216           }
2217           stats->_nmethods_size += code->total_size();
2218           stats->_nmethods_code_size += code->insts_size();
2219         } else { // if (!stats)
2220           assert(false, "Compiler statistics object must exist");
2221         }
2222       } else { // if (!comp)
2223         assert(false, "Compiler object must exist");
2224       }
2225 #endif // INCLUDE_JVMCI
2226     }
2227 
2228     if (UsePerfData) {
2229       // save the name of the last method compiled
2230       _perf_last_method->set_value(counters->current_method());
2231       _perf_last_compile_type->set_value(counters->compile_type());
2232       _perf_last_compile_size->set_value(method->code_size() +
2233                                          task->num_inlined_bytecodes());
2234       if (is_osr) {
2235         _perf_osr_compilation->inc(time.ticks());
2236         _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2237       } else {
2238         _perf_standard_compilation->inc(time.ticks());
2239         _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2240       }
2241     }
2242 
2243     if (CITimeEach) {
2244       float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2245       tty->print_cr("%3d   seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2246                     compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2247     }
2248 
2249     // Collect counts of successful compilations
2250     _sum_nmethod_size      += code->total_size();
2251     _sum_nmethod_code_size += code->insts_size();
2252     _total_compile_count++;
2253 
2254     if (UsePerfData) {
2255       _perf_sum_nmethod_size->inc(     code->total_size());
2256       _perf_sum_nmethod_code_size->inc(code->insts_size());
2257       _perf_total_compile_count->inc();
2258     }
2259 
2260     if (is_osr) {
2261       if (UsePerfData) _perf_total_osr_compile_count->inc();
2262       _total_osr_compile_count++;
2263     } else {
2264       if (UsePerfData) _perf_total_standard_compile_count->inc();
2265       _total_standard_compile_count++;
2266     }
2267   }
2268   // set the current method for the thread to null
2269   if (UsePerfData) counters->set_current_method("");
2270 }
2271 
2272 const char* CompileBroker::compiler_name(int comp_level) {
2273   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2274   if (comp == NULL) {
2275     return "no compiler";
2276   } else {
2277     return (comp->name());
2278   }
2279 }
2280 
2281 #if INCLUDE_JVMCI
2282 void CompileBroker::print_times(AbstractCompiler* comp) {
2283   CompilerStatistics* stats = comp->stats();
2284   if (stats) {
2285     tty->print_cr("  %s {speed: %d bytes/s; standard: %6.3f s, %d bytes, %d methods; osr: %6.3f s, %d bytes, %d methods; nmethods_size: %d bytes; nmethods_code_size: %d bytes}",
2286                 comp->name(), stats->bytes_per_second(),
2287                 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2288                 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2289                 stats->_nmethods_size, stats->_nmethods_code_size);
2290   } else { // if (!stats)
2291     assert(false, "Compiler statistics object must exist");
2292   }
2293   comp->print_timers();
2294 }
2295 #endif // INCLUDE_JVMCI
2296 
2297 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2298 #if INCLUDE_JVMCI
2299   elapsedTimer standard_compilation;
2300   elapsedTimer total_compilation;
2301   elapsedTimer osr_compilation;
2302 
2303   int standard_bytes_compiled = 0;
2304   int osr_bytes_compiled = 0;
2305 
2306   int standard_compile_count = 0;
2307   int osr_compile_count = 0;
2308   int total_compile_count = 0;
2309 
2310   int nmethods_size = 0;
2311   int nmethods_code_size = 0;
2312   bool printedHeader = false;
2313 
2314   for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2315     AbstractCompiler* comp = _compilers[i];
2316     if (comp != NULL) {
2317       if (per_compiler && aggregate && !printedHeader) {
2318         printedHeader = true;
2319         tty->cr();
2320         tty->print_cr("Individual compiler times (for compiled methods only)");
2321         tty->print_cr("------------------------------------------------");
2322         tty->cr();
2323       }
2324       CompilerStatistics* stats = comp->stats();
2325 
2326       if (stats) {
2327         standard_compilation.add(stats->_standard._time);
2328         osr_compilation.add(stats->_osr._time);
2329 
2330         standard_bytes_compiled += stats->_standard._bytes;
2331         osr_bytes_compiled += stats->_osr._bytes;
2332 
2333         standard_compile_count += stats->_standard._count;
2334         osr_compile_count += stats->_osr._count;
2335 
2336         nmethods_size += stats->_nmethods_size;
2337         nmethods_code_size += stats->_nmethods_code_size;
2338       } else { // if (!stats)
2339         assert(false, "Compiler statistics object must exist");
2340       }
2341 
2342       if (per_compiler) {
2343         print_times(comp);
2344       }
2345     }
2346   }
2347   total_compile_count = osr_compile_count + standard_compile_count;
2348   total_compilation.add(osr_compilation);
2349   total_compilation.add(standard_compilation);
2350 
2351   // In hosted mode, print the JVMCI compiler specific counters manually.
2352   if (!UseJVMCICompiler) {
2353     JVMCICompiler::print_compilation_timers();
2354   }
2355 #else // INCLUDE_JVMCI
2356   elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2357   elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2358   elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2359 
2360   int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2361   int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2362 
2363   int standard_compile_count = CompileBroker::_total_standard_compile_count;
2364   int osr_compile_count = CompileBroker::_total_osr_compile_count;
2365   int total_compile_count = CompileBroker::_total_compile_count;
2366 
2367   int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2368   int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2369 #endif // INCLUDE_JVMCI
2370 
2371   if (!aggregate) {
2372     return;
2373   }
2374   tty->cr();
2375   tty->print_cr("Accumulated compiler times");
2376   tty->print_cr("----------------------------------------------------------");
2377                //0000000000111111111122222222223333333333444444444455555555556666666666
2378                //0123456789012345678901234567890123456789012345678901234567890123456789
2379   tty->print_cr("  Total compilation time   : %7.3f s", total_compilation.seconds());
2380   tty->print_cr("    Standard compilation   : %7.3f s, Average : %2.3f s",
2381                 standard_compilation.seconds(),
2382                 standard_compilation.seconds() / standard_compile_count);
2383   tty->print_cr("    Bailed out compilation : %7.3f s, Average : %2.3f s",
2384                 CompileBroker::_t_bailedout_compilation.seconds(),
2385                 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2386   tty->print_cr("    On stack replacement   : %7.3f s, Average : %2.3f s",
2387                 osr_compilation.seconds(),
2388                 osr_compilation.seconds() / osr_compile_count);
2389   tty->print_cr("    Invalidated            : %7.3f s, Average : %2.3f s",
2390                 CompileBroker::_t_invalidated_compilation.seconds(),
2391                 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2392 
2393   AbstractCompiler *comp = compiler(CompLevel_simple);
2394   if (comp != NULL) {
2395     tty->cr();
2396     comp->print_timers();
2397   }
2398   comp = compiler(CompLevel_full_optimization);
2399   if (comp != NULL) {
2400     tty->cr();
2401     comp->print_timers();
2402   }
2403   tty->cr();
2404   tty->print_cr("  Total compiled methods    : %8d methods", total_compile_count);
2405   tty->print_cr("    Standard compilation    : %8d methods", standard_compile_count);
2406   tty->print_cr("    On stack replacement    : %8d methods", osr_compile_count);
2407   int tcb = osr_bytes_compiled + standard_bytes_compiled;
2408   tty->print_cr("  Total compiled bytecodes  : %8d bytes", tcb);
2409   tty->print_cr("    Standard compilation    : %8d bytes", standard_bytes_compiled);
2410   tty->print_cr("    On stack replacement    : %8d bytes", osr_bytes_compiled);
2411   double tcs = total_compilation.seconds();
2412   int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2413   tty->print_cr("  Average compilation speed : %8d bytes/s", bps);
2414   tty->cr();
2415   tty->print_cr("  nmethod code size         : %8d bytes", nmethods_code_size);
2416   tty->print_cr("  nmethod total size        : %8d bytes", nmethods_size);
2417 }
2418 
2419 // Debugging output for failure
2420 void CompileBroker::print_last_compile() {
2421   if (_last_compile_level != CompLevel_none &&
2422       compiler(_last_compile_level) != NULL &&
2423       _last_compile_type != no_compile) {
2424     if (_last_compile_type == osr_compile) {
2425       tty->print_cr("Last parse:  [osr]%d+++(%d) %s",
2426                     _osr_compilation_id, _last_compile_level, _last_method_compiled);
2427     } else {
2428       tty->print_cr("Last parse:  %d+++(%d) %s",
2429                     _compilation_id, _last_compile_level, _last_method_compiled);
2430     }
2431   }
2432 }