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