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