1 /*
   2  * Copyright (c) 1999, 2015, 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                                         Thread* thread) {
 842   // do nothing if compiler thread(s) is not available
 843   if (!_initialized) {
 844     return;
 845   }
 846 
 847   guarantee(!method->is_abstract(), "cannot compile abstract methods");
 848   assert(method->method_holder()->is_instance_klass(),
 849          "sanity check");
 850   assert(!method->method_holder()->is_not_initialized(),
 851          "method holder must be initialized");
 852   assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
 853 
 854   if (CIPrintRequests) {
 855     tty->print("request: ");
 856     method->print_short_name(tty);
 857     if (osr_bci != InvocationEntryBci) {
 858       tty->print(" osr_bci: %d", osr_bci);
 859     }
 860     tty->print(" level: %d comment: %s count: %d", comp_level, comment, hot_count);
 861     if (!hot_method.is_null()) {
 862       tty->print(" hot: ");
 863       if (hot_method() != method()) {
 864           hot_method->print_short_name(tty);
 865       } else {
 866         tty->print("yes");
 867       }
 868     }
 869     tty->cr();
 870   }
 871 
 872   // A request has been made for compilation.  Before we do any
 873   // real work, check to see if the method has been compiled
 874   // in the meantime with a definitive result.
 875   if (compilation_is_complete(method, osr_bci, comp_level)) {
 876     return;
 877   }
 878 
 879 #ifndef PRODUCT
 880   if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
 881     if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
 882       // Positive OSROnlyBCI means only compile that bci.  Negative means don't compile that BCI.
 883       return;
 884     }
 885   }
 886 #endif
 887 
 888   // If this method is already in the compile queue, then
 889   // we do not block the current thread.
 890   if (compilation_is_in_queue(method)) {
 891     // We may want to decay our counter a bit here to prevent
 892     // multiple denied requests for compilation.  This is an
 893     // open compilation policy issue. Note: The other possibility,
 894     // in the case that this is a blocking compile request, is to have
 895     // all subsequent blocking requesters wait for completion of
 896     // ongoing compiles. Note that in this case we'll need a protocol
 897     // for freeing the associated compile tasks. [Or we could have
 898     // a single static monitor on which all these waiters sleep.]
 899     return;
 900   }
 901 
 902   // If the requesting thread is holding the pending list lock
 903   // then we just return. We can't risk blocking while holding
 904   // the pending list lock or a 3-way deadlock may occur
 905   // between the reference handler thread, a GC (instigated
 906   // by a compiler thread), and compiled method registration.
 907   if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
 908     return;
 909   }
 910 
 911   if (TieredCompilation) {
 912     // Tiered policy requires MethodCounters to exist before adding a method to
 913     // the queue. Create if we don't have them yet.
 914     method->get_method_counters(thread);
 915   }
 916 
 917   // Outputs from the following MutexLocker block:
 918   CompileTask* task     = NULL;
 919   bool         blocking = false;
 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     // Should this thread wait for completion of the compile?
 950     blocking = is_compile_blocking();
 951 
 952 #if INCLUDE_JVMCI
 953     if (UseJVMCICompiler) {
 954       if (blocking) {
 955         // Don't allow blocking compiles for requests triggered by JVMCI.
 956         if (thread->is_Compiler_thread()) {
 957           blocking = false;
 958         }
 959 
 960         // Don't allow blocking compiles if inside a class initializer or while performing class loading
 961         vframeStream vfst((JavaThread*) thread);
 962         for (; !vfst.at_end(); vfst.next()) {
 963           if (vfst.method()->is_static_initializer() ||
 964               (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
 965                   vfst.method()->name() == vmSymbols::loadClass_name())) {
 966             blocking = false;
 967             break;
 968           }
 969         }
 970 
 971         // Don't allow blocking compilation requests to JVMCI
 972         // if JVMCI itself is not yet initialized
 973         if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
 974           blocking = false;
 975         }
 976 
 977         // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
 978         // to avoid deadlock between compiler thread(s) and threads run at shutdown
 979         // such as the DestroyJavaVM thread.
 980         if (JVMCIRuntime::shutdown_called()) {
 981           blocking = false;
 982         }
 983       }
 984     }
 985 #endif // INCLUDE_JVMCI
 986 
 987     // We will enter the compilation in the queue.
 988     // 14012000: Note that this sets the queued_for_compile bits in
 989     // the target method. We can now reason that a method cannot be
 990     // queued for compilation more than once, as follows:
 991     // Before a thread queues a task for compilation, it first acquires
 992     // the compile queue lock, then checks if the method's queued bits
 993     // are set or it has already been compiled. Thus there can not be two
 994     // instances of a compilation task for the same method on the
 995     // compilation queue. Consider now the case where the compilation
 996     // thread has already removed a task for that method from the queue
 997     // and is in the midst of compiling it. In this case, the
 998     // queued_for_compile bits must be set in the method (and these
 999     // will be visible to the current thread, since the bits were set
1000     // under protection of the compile queue lock, which we hold now.
1001     // When the compilation completes, the compiler thread first sets
1002     // the compilation result and then clears the queued_for_compile
1003     // bits. Neither of these actions are protected by a barrier (or done
1004     // under the protection of a lock), so the only guarantee we have
1005     // (on machines with TSO (Total Store Order)) is that these values
1006     // will update in that order. As a result, the only combinations of
1007     // these bits that the current thread will see are, in temporal order:
1008     // <RESULT, QUEUE> :
1009     //     <0, 1> : in compile queue, but not yet compiled
1010     //     <1, 1> : compiled but queue bit not cleared
1011     //     <1, 0> : compiled and queue bit cleared
1012     // Because we first check the queue bits then check the result bits,
1013     // we are assured that we cannot introduce a duplicate task.
1014     // Note that if we did the tests in the reverse order (i.e. check
1015     // result then check queued bit), we could get the result bit before
1016     // the compilation completed, and the queue bit after the compilation
1017     // completed, and end up introducing a "duplicate" (redundant) task.
1018     // In that case, the compiler thread should first check if a method
1019     // has already been compiled before trying to compile it.
1020     // NOTE: in the event that there are multiple compiler threads and
1021     // there is de-optimization/recompilation, things will get hairy,
1022     // and in that case it's best to protect both the testing (here) of
1023     // these bits, and their updating (here and elsewhere) under a
1024     // common lock.
1025     task = create_compile_task(queue,
1026                                compile_id, method,
1027                                osr_bci, comp_level,
1028                                hot_method, hot_count, comment,
1029                                blocking);
1030   }
1031 
1032   if (blocking) {
1033     wait_for_completion(task);
1034   }
1035 }
1036 
1037 
1038 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1039                                        int comp_level,
1040                                        const methodHandle& hot_method, int hot_count,
1041                                        const char* comment, Thread* THREAD) {
1042   // make sure arguments make sense
1043   assert(method->method_holder()->is_instance_klass(), "not an instance method");
1044   assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1045   assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1046   assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1047   // allow any levels for WhiteBox
1048   assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1049   // return quickly if possible
1050 
1051   // lock, make sure that the compilation
1052   // isn't prohibited in a straightforward way.
1053   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1054   if (comp == NULL || !comp->can_compile_method(method) ||
1055       compilation_is_prohibited(method, osr_bci, comp_level)) {
1056     return NULL;
1057   }
1058 
1059   if (osr_bci == InvocationEntryBci) {
1060     // standard compilation
1061     nmethod* method_code = method->code();
1062     if (method_code != NULL) {
1063       if (compilation_is_complete(method, osr_bci, comp_level)) {
1064         return method_code;
1065       }
1066     }
1067     if (method->is_not_compilable(comp_level)) {
1068       return NULL;
1069     }
1070   } else {
1071     // osr compilation
1072 #ifndef TIERED
1073     // seems like an assert of dubious value
1074     assert(comp_level == CompLevel_highest_tier,
1075            "all OSR compiles are assumed to be at a single compilation level");
1076 #endif // TIERED
1077     // We accept a higher level osr method
1078     nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1079     if (nm != NULL) return nm;
1080     if (method->is_not_osr_compilable(comp_level)) return NULL;
1081   }
1082 
1083   assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1084   // some prerequisites that are compiler specific
1085   if (comp->is_c2() || comp->is_shark()) {
1086     method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1087     // Resolve all classes seen in the signature of the method
1088     // we are compiling.
1089     Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1090   }
1091 
1092   // If the method is native, do the lookup in the thread requesting
1093   // the compilation. Native lookups can load code, which is not
1094   // permitted during compilation.
1095   //
1096   // Note: A native method implies non-osr compilation which is
1097   //       checked with an assertion at the entry of this method.
1098   if (method->is_native() && !method->is_method_handle_intrinsic()) {
1099     bool in_base_library;
1100     address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1101     if (HAS_PENDING_EXCEPTION) {
1102       // In case of an exception looking up the method, we just forget
1103       // about it. The interpreter will kick-in and throw the exception.
1104       method->set_not_compilable(); // implies is_not_osr_compilable()
1105       CLEAR_PENDING_EXCEPTION;
1106       return NULL;
1107     }
1108     assert(method->has_native_function(), "must have native code by now");
1109   }
1110 
1111   // RedefineClasses() has replaced this method; just return
1112   if (method->is_old()) {
1113     return NULL;
1114   }
1115 
1116   // JVMTI -- post_compile_event requires jmethod_id() that may require
1117   // a lock the compiling thread can not acquire. Prefetch it here.
1118   if (JvmtiExport::should_post_compiled_method_load()) {
1119     method->jmethod_id();
1120   }
1121 
1122   // do the compilation
1123   if (method->is_native()) {
1124     if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1125       // The following native methods:
1126       //
1127       // java.lang.Float.intBitsToFloat
1128       // java.lang.Float.floatToRawIntBits
1129       // java.lang.Double.longBitsToDouble
1130       // java.lang.Double.doubleToRawLongBits
1131       //
1132       // are called through the interpreter even if interpreter native stubs
1133       // are not preferred (i.e., calling through adapter handlers is preferred).
1134       // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1135       // if the version of the methods from the native libraries is called.
1136       // As the interpreter and the C2-intrinsified version of the methods preserves
1137       // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1138       if ((UseSSE >= 1 &&
1139           (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1140            method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1141           (UseSSE >= 2 &&
1142            (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1143             method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1144         return NULL;
1145       }
1146 
1147       // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1148       // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1149       //
1150       // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1151       // in this case.  If we can't generate one and use it we can not execute the out-of-line method handle calls.
1152       AdapterHandlerLibrary::create_native_wrapper(method);
1153     } else {
1154       return NULL;
1155     }
1156   } else {
1157     // If the compiler is shut off due to code cache getting full
1158     // fail out now so blocking compiles dont hang the java thread
1159     if (!should_compile_new_jobs()) {
1160       CompilationPolicy::policy()->delay_compilation(method());
1161       return NULL;
1162     }
1163     compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1164   }
1165 
1166   // return requested nmethod
1167   // We accept a higher level osr method
1168   if (osr_bci == InvocationEntryBci) {
1169     return method->code();
1170   }
1171   return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1172 }
1173 
1174 
1175 // ------------------------------------------------------------------
1176 // CompileBroker::compilation_is_complete
1177 //
1178 // See if compilation of this method is already complete.
1179 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1180                                             int                 osr_bci,
1181                                             int                 comp_level) {
1182   bool is_osr = (osr_bci != standard_entry_bci);
1183   if (is_osr) {
1184     if (method->is_not_osr_compilable(comp_level)) {
1185       return true;
1186     } else {
1187       nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1188       return (result != NULL);
1189     }
1190   } else {
1191     if (method->is_not_compilable(comp_level)) {
1192       return true;
1193     } else {
1194       nmethod* result = method->code();
1195       if (result == NULL) return false;
1196       return comp_level == result->comp_level();
1197     }
1198   }
1199 }
1200 
1201 
1202 /**
1203  * See if this compilation is already requested.
1204  *
1205  * Implementation note: there is only a single "is in queue" bit
1206  * for each method.  This means that the check below is overly
1207  * conservative in the sense that an osr compilation in the queue
1208  * will block a normal compilation from entering the queue (and vice
1209  * versa).  This can be remedied by a full queue search to disambiguate
1210  * cases.  If it is deemed profitable, this may be done.
1211  */
1212 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1213   return method->queued_for_compilation();
1214 }
1215 
1216 // ------------------------------------------------------------------
1217 // CompileBroker::compilation_is_prohibited
1218 //
1219 // See if this compilation is not allowed.
1220 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level) {
1221   bool is_native = method->is_native();
1222   // Some compilers may not support the compilation of natives.
1223   AbstractCompiler *comp = compiler(comp_level);
1224   if (is_native &&
1225       (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1226     method->set_not_compilable_quietly(comp_level);
1227     return true;
1228   }
1229 
1230   bool is_osr = (osr_bci != standard_entry_bci);
1231   // Some compilers may not support on stack replacement.
1232   if (is_osr &&
1233       (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1234     method->set_not_osr_compilable(comp_level);
1235     return true;
1236   }
1237 
1238   // Breaking the abstraction - directives are only used inside a compilation otherwise.
1239   DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1240   bool excluded = directive->ExcludeOption;
1241   DirectivesStack::release(directive);
1242 
1243   // The method may be explicitly excluded by the user.
1244   double scale;
1245   if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1246     bool quietly = CompilerOracle::should_exclude_quietly();
1247     if (PrintCompilation && !quietly) {
1248       // This does not happen quietly...
1249       ResourceMark rm;
1250       tty->print("### Excluding %s:%s",
1251                  method->is_native() ? "generation of native wrapper" : "compile",
1252                  (method->is_static() ? " static" : ""));
1253       method->print_short_name(tty);
1254       tty->cr();
1255     }
1256     method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1257   }
1258 
1259   return false;
1260 }
1261 
1262 /**
1263  * Generate serialized IDs for compilation requests. If certain debugging flags are used
1264  * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1265  * The function also allows to generate separate compilation IDs for OSR compilations.
1266  */
1267 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1268 #ifdef ASSERT
1269   bool is_osr = (osr_bci != standard_entry_bci);
1270   int id;
1271   if (method->is_native()) {
1272     assert(!is_osr, "can't be osr");
1273     // Adapters, native wrappers and method handle intrinsics
1274     // should be generated always.
1275     return Atomic::add(1, &_compilation_id);
1276   } else if (CICountOSR && is_osr) {
1277     id = Atomic::add(1, &_osr_compilation_id);
1278     if (CIStartOSR <= id && id < CIStopOSR) {
1279       return id;
1280     }
1281   } else {
1282     id = Atomic::add(1, &_compilation_id);
1283     if (CIStart <= id && id < CIStop) {
1284       return id;
1285     }
1286   }
1287 
1288   // Method was not in the appropriate compilation range.
1289   method->set_not_compilable_quietly();
1290   return 0;
1291 #else
1292   // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1293   // only _compilation_id is incremented.
1294   return Atomic::add(1, &_compilation_id);
1295 #endif
1296 }
1297 
1298 // ------------------------------------------------------------------
1299 // CompileBroker::assign_compile_id_unlocked
1300 //
1301 // Public wrapper for assign_compile_id that acquires the needed locks
1302 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1303   MutexLocker locker(MethodCompileQueue_lock, thread);
1304   return assign_compile_id(method, osr_bci);
1305 }
1306 
1307 /**
1308  * Should the current thread block until this compilation request
1309  * has been fulfilled?
1310  */
1311 bool CompileBroker::is_compile_blocking() {
1312   assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1313   return !BackgroundCompilation;
1314 }
1315 
1316 
1317 // ------------------------------------------------------------------
1318 // CompileBroker::preload_classes
1319 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1320   // Move this code over from c1_Compiler.cpp
1321   ShouldNotReachHere();
1322 }
1323 
1324 
1325 // ------------------------------------------------------------------
1326 // CompileBroker::create_compile_task
1327 //
1328 // Create a CompileTask object representing the current request for
1329 // compilation.  Add this task to the queue.
1330 CompileTask* CompileBroker::create_compile_task(CompileQueue*       queue,
1331                                                 int                 compile_id,
1332                                                 const methodHandle& method,
1333                                                 int                 osr_bci,
1334                                                 int                 comp_level,
1335                                                 const methodHandle& hot_method,
1336                                                 int                 hot_count,
1337                                                 const char*         comment,
1338                                                 bool                blocking) {
1339   CompileTask* new_task = CompileTask::allocate();
1340   new_task->initialize(compile_id, method, osr_bci, comp_level,
1341                        hot_method, hot_count, comment,
1342                        blocking);
1343   queue->add(new_task);
1344   return new_task;
1345 }
1346 
1347 #if INCLUDE_JVMCI
1348 // The number of milliseconds to wait before checking if
1349 // JVMCI compilation has made progress.
1350 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500;
1351 
1352 // The number of JVMCI compilation progress checks that must fail
1353 // before unblocking a thread waiting for a blocking compilation.
1354 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5;
1355 
1356 /**
1357  * Waits for a JVMCI compiler to complete a given task. This thread
1358  * waits until either the task completes or it sees no JVMCI compilation
1359  * progress for N consecutive milliseconds where N is
1360  * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1361  * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1362  *
1363  * @return true if this thread needs to free/recycle the task
1364  */
1365 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1366   MutexLocker waiter(task->lock(), thread);
1367   int progress_wait_attempts = 0;
1368   int methods_compiled = jvmci->methods_compiled();
1369   while (!task->is_complete() && !is_compilation_disabled_forever() &&
1370          task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1371     CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1372 
1373     bool progress;
1374     if (jvmci_compiler_thread != NULL) {
1375       // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1376       progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1377     } else {
1378       // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1379       // that all JVMCI compiler threads are blocked on. We use the counter for
1380       // successful JVMCI compilations to determine whether JVMCI compilation
1381       // is still making progress through the JVMCI compiler queue.
1382       progress = jvmci->methods_compiled() != methods_compiled;
1383     }
1384 
1385     if (!progress) {
1386       if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1387         if (PrintCompilation) {
1388           task->print(tty, "wait for blocking compilation timed out");
1389         }
1390         break;
1391       }
1392     } else {
1393       progress_wait_attempts = 0;
1394       if (jvmci_compiler_thread == NULL) {
1395         methods_compiled = jvmci->methods_compiled();
1396       }
1397     }
1398   }
1399   task->clear_waiter();
1400   return task->is_complete();
1401 }
1402 #endif
1403 
1404 /**
1405  *  Wait for the compilation task to complete.
1406  */
1407 void CompileBroker::wait_for_completion(CompileTask* task) {
1408   if (CIPrintCompileQueue) {
1409     ttyLocker ttyl;
1410     tty->print_cr("BLOCKING FOR COMPILE");
1411   }
1412 
1413   assert(task->is_blocking(), "can only wait on blocking task");
1414 
1415   JavaThread* thread = JavaThread::current();
1416   thread->set_blocked_on_compilation(true);
1417 
1418   methodHandle method(thread, task->method());
1419   bool free_task;
1420 #if INCLUDE_JVMCI
1421   AbstractCompiler* comp = compiler(task->comp_level());
1422   if (comp->is_jvmci()) {
1423     free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1424   } else
1425 #endif
1426   {
1427     MutexLocker waiter(task->lock(), thread);
1428     free_task = true;
1429     while (!task->is_complete() && !is_compilation_disabled_forever()) {
1430       task->lock()->wait();
1431     }
1432   }
1433 
1434   thread->set_blocked_on_compilation(false);
1435   if (free_task) {
1436     if (is_compilation_disabled_forever()) {
1437       CompileTask::free(task);
1438       return;
1439     }
1440 
1441     // It is harmless to check this status without the lock, because
1442     // completion is a stable property (until the task object is recycled).
1443     assert(task->is_complete(), "Compilation should have completed");
1444     assert(task->code_handle() == NULL, "must be reset");
1445 
1446     // By convention, the waiter is responsible for recycling a
1447     // blocking CompileTask. Since there is only one waiter ever
1448     // waiting on a CompileTask, we know that no one else will
1449     // be using this CompileTask; we can free it.
1450     CompileTask::free(task);
1451   }
1452 }
1453 
1454 /**
1455  * Initialize compiler thread(s) + compiler object(s). The postcondition
1456  * of this function is that the compiler runtimes are initialized and that
1457  * compiler threads can start compiling.
1458  */
1459 bool CompileBroker::init_compiler_runtime() {
1460   CompilerThread* thread = CompilerThread::current();
1461   AbstractCompiler* comp = thread->compiler();
1462   // Final sanity check - the compiler object must exist
1463   guarantee(comp != NULL, "Compiler object must exist");
1464 
1465   int system_dictionary_modification_counter;
1466   {
1467     MutexLocker locker(Compile_lock, thread);
1468     system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1469   }
1470 
1471   {
1472     // Must switch to native to allocate ci_env
1473     ThreadToNativeFromVM ttn(thread);
1474     ciEnv ci_env(NULL, system_dictionary_modification_counter);
1475     // Cache Jvmti state
1476     ci_env.cache_jvmti_state();
1477     // Cache DTrace flags
1478     ci_env.cache_dtrace_flags();
1479 
1480     // Switch back to VM state to do compiler initialization
1481     ThreadInVMfromNative tv(thread);
1482     ResetNoHandleMark rnhm;
1483 
1484     if (!comp->is_shark()) {
1485       // Perform per-thread and global initializations
1486       comp->initialize();
1487     }
1488   }
1489 
1490   if (comp->is_failed()) {
1491     disable_compilation_forever();
1492     // If compiler initialization failed, no compiler thread that is specific to a
1493     // particular compiler runtime will ever start to compile methods.
1494     shutdown_compiler_runtime(comp, thread);
1495     return false;
1496   }
1497 
1498   // C1 specific check
1499   if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1500     warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1501     return false;
1502   }
1503 
1504   return true;
1505 }
1506 
1507 /**
1508  * If C1 and/or C2 initialization failed, we shut down all compilation.
1509  * We do this to keep things simple. This can be changed if it ever turns
1510  * out to be a problem.
1511  */
1512 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1513   // Free buffer blob, if allocated
1514   if (thread->get_buffer_blob() != NULL) {
1515     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1516     CodeCache::free(thread->get_buffer_blob());
1517   }
1518 
1519   if (comp->should_perform_shutdown()) {
1520     // There are two reasons for shutting down the compiler
1521     // 1) compiler runtime initialization failed
1522     // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1523     warning("%s initialization failed. Shutting down all compilers", comp->name());
1524 
1525     // Only one thread per compiler runtime object enters here
1526     // Set state to shut down
1527     comp->set_shut_down();
1528 
1529     // Delete all queued compilation tasks to make compiler threads exit faster.
1530     if (_c1_compile_queue != NULL) {
1531       _c1_compile_queue->free_all();
1532     }
1533 
1534     if (_c2_compile_queue != NULL) {
1535       _c2_compile_queue->free_all();
1536     }
1537 
1538     // Set flags so that we continue execution with using interpreter only.
1539     UseCompiler    = false;
1540     UseInterpreter = true;
1541 
1542     // We could delete compiler runtimes also. However, there are references to
1543     // the compiler runtime(s) (e.g.,  nmethod::is_compiled_by_c1()) which then
1544     // fail. This can be done later if necessary.
1545   }
1546 }
1547 
1548 // ------------------------------------------------------------------
1549 // CompileBroker::compiler_thread_loop
1550 //
1551 // The main loop run by a CompilerThread.
1552 void CompileBroker::compiler_thread_loop() {
1553   CompilerThread* thread = CompilerThread::current();
1554   CompileQueue* queue = thread->queue();
1555   // For the thread that initializes the ciObjectFactory
1556   // this resource mark holds all the shared objects
1557   ResourceMark rm;
1558 
1559   // First thread to get here will initialize the compiler interface
1560 
1561   if (!ciObjectFactory::is_initialized()) {
1562     ASSERT_IN_VM;
1563     MutexLocker only_one (CompileThread_lock, thread);
1564     if (!ciObjectFactory::is_initialized()) {
1565       ciObjectFactory::initialize();
1566     }
1567   }
1568 
1569   // Open a log.
1570   if (LogCompilation) {
1571     init_compiler_thread_log();
1572   }
1573   CompileLog* log = thread->log();
1574   if (log != NULL) {
1575     log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1576                     thread->name(),
1577                     os::current_thread_id(),
1578                     os::current_process_id());
1579     log->stamp();
1580     log->end_elem();
1581   }
1582 
1583   // If compiler thread/runtime initialization fails, exit the compiler thread
1584   if (!init_compiler_runtime()) {
1585     return;
1586   }
1587 
1588   // Poll for new compilation tasks as long as the JVM runs. Compilation
1589   // should only be disabled if something went wrong while initializing the
1590   // compiler runtimes. This, in turn, should not happen. The only known case
1591   // when compiler runtime initialization fails is if there is not enough free
1592   // space in the code cache to generate the necessary stubs, etc.
1593   while (!is_compilation_disabled_forever()) {
1594     // We need this HandleMark to avoid leaking VM handles.
1595     HandleMark hm(thread);
1596 
1597     CompileTask* task = queue->get();
1598     if (task == NULL) {
1599       continue;
1600     }
1601 
1602     // Give compiler threads an extra quanta.  They tend to be bursty and
1603     // this helps the compiler to finish up the job.
1604     if (CompilerThreadHintNoPreempt) {
1605       os::hint_no_preempt();
1606     }
1607 
1608     // Assign the task to the current thread.  Mark this compilation
1609     // thread as active for the profiler.
1610     CompileTaskWrapper ctw(task);
1611     nmethodLocker result_handle;  // (handle for the nmethod produced by this task)
1612     task->set_code_handle(&result_handle);
1613     methodHandle method(thread, task->method());
1614 
1615     // Never compile a method if breakpoints are present in it
1616     if (method()->number_of_breakpoints() == 0) {
1617       // Compile the method.
1618       if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1619         invoke_compiler_on_method(task);
1620       } else {
1621         // After compilation is disabled, remove remaining methods from queue
1622         method->clear_queued_for_compilation();
1623         task->set_failure_reason("compilation is disabled");
1624       }
1625     }
1626   }
1627 
1628   // Shut down compiler runtime
1629   shutdown_compiler_runtime(thread->compiler(), thread);
1630 }
1631 
1632 // ------------------------------------------------------------------
1633 // CompileBroker::init_compiler_thread_log
1634 //
1635 // Set up state required by +LogCompilation.
1636 void CompileBroker::init_compiler_thread_log() {
1637     CompilerThread* thread = CompilerThread::current();
1638     char  file_name[4*K];
1639     FILE* fp = NULL;
1640     intx thread_id = os::current_thread_id();
1641     for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1642       const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1643       if (dir == NULL) {
1644         jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1645                      thread_id, os::current_process_id());
1646       } else {
1647         jio_snprintf(file_name, sizeof(file_name),
1648                      "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1649                      os::file_separator(), thread_id, os::current_process_id());
1650       }
1651 
1652       fp = fopen(file_name, "wt");
1653       if (fp != NULL) {
1654         if (LogCompilation && Verbose) {
1655           tty->print_cr("Opening compilation log %s", file_name);
1656         }
1657         CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1658         thread->init_log(log);
1659 
1660         if (xtty != NULL) {
1661           ttyLocker ttyl;
1662           // Record any per thread log files
1663           xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1664         }
1665         return;
1666       }
1667     }
1668     warning("Cannot open log file: %s", file_name);
1669 }
1670 
1671 void CompileBroker::log_metaspace_failure() {
1672   const char* message = "some methods may not be compiled because metaspace "
1673                         "is out of memory";
1674   if (_compilation_log != NULL) {
1675     _compilation_log->log_metaspace_failure(message);
1676   }
1677   if (PrintCompilation) {
1678     tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1679   }
1680 }
1681 
1682 
1683 // ------------------------------------------------------------------
1684 // CompileBroker::set_should_block
1685 //
1686 // Set _should_block.
1687 // Call this from the VM, with Threads_lock held and a safepoint requested.
1688 void CompileBroker::set_should_block() {
1689   assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1690   assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1691 #ifndef PRODUCT
1692   if (PrintCompilation && (Verbose || WizardMode))
1693     tty->print_cr("notifying compiler thread pool to block");
1694 #endif
1695   _should_block = true;
1696 }
1697 
1698 // ------------------------------------------------------------------
1699 // CompileBroker::maybe_block
1700 //
1701 // Call this from the compiler at convenient points, to poll for _should_block.
1702 void CompileBroker::maybe_block() {
1703   if (_should_block) {
1704 #ifndef PRODUCT
1705     if (PrintCompilation && (Verbose || WizardMode))
1706       tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1707 #endif
1708     ThreadInVMfromNative tivfn(JavaThread::current());
1709   }
1710 }
1711 
1712 // wrapper for CodeCache::print_summary()
1713 static void codecache_print(bool detailed)
1714 {
1715   ResourceMark rm;
1716   stringStream s;
1717   // Dump code cache  into a buffer before locking the tty,
1718   {
1719     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1720     CodeCache::print_summary(&s, detailed);
1721   }
1722   ttyLocker ttyl;
1723   tty->print("%s", s.as_string());
1724 }
1725 
1726 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1727 
1728   if (success) {
1729     task->mark_success();
1730     if (ci_env != NULL) {
1731       task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1732     }
1733     if (_compilation_log != NULL) {
1734       nmethod* code = task->code();
1735       if (code != NULL) {
1736         _compilation_log->log_nmethod(thread, code);
1737       }
1738     }
1739   }
1740 
1741   // simulate crash during compilation
1742   assert(task->compile_id() != CICrashAt, "just as planned");
1743   if (event.should_commit()) {
1744     event.set_method(task->method());
1745     event.set_compileID(task->compile_id());
1746     event.set_compileLevel(task->comp_level());
1747     event.set_succeded(task->is_success());
1748     event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1749     event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1750     event.set_inlinedBytes(task->num_inlined_bytecodes());
1751     event.commit();
1752   }
1753 }
1754 
1755 int DirectivesStack::_depth = 0;
1756 CompilerDirectives* DirectivesStack::_top = NULL;
1757 CompilerDirectives* DirectivesStack::_bottom = NULL;
1758 
1759 // ------------------------------------------------------------------
1760 // CompileBroker::invoke_compiler_on_method
1761 //
1762 // Compile a method.
1763 //
1764 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1765   if (PrintCompilation) {
1766     ResourceMark rm;
1767     task->print_tty();
1768   }
1769   elapsedTimer time;
1770 
1771   CompilerThread* thread = CompilerThread::current();
1772   ResourceMark rm(thread);
1773 
1774   if (LogEvents) {
1775     _compilation_log->log_compile(thread, task);
1776   }
1777 
1778   // Common flags.
1779   uint compile_id = task->compile_id();
1780   int osr_bci = task->osr_bci();
1781   bool is_osr = (osr_bci != standard_entry_bci);
1782   bool should_log = (thread->log() != NULL);
1783   bool should_break = false;
1784   int task_level = task->comp_level();
1785 
1786   DirectiveSet* directive;
1787   {
1788     // create the handle inside it's own block so it can't
1789     // accidentally be referenced once the thread transitions to
1790     // native.  The NoHandleMark before the transition should catch
1791     // any cases where this occurs in the future.
1792     methodHandle method(thread, task->method());
1793     assert(!method->is_native(), "no longer compile natives");
1794 
1795     // Look up matching directives
1796     directive = DirectivesStack::getMatchingDirective(method, compiler(task_level));
1797 
1798     // Save information about this method in case of failure.
1799     set_last_compile(thread, method, is_osr, task_level);
1800 
1801     DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1802   }
1803 
1804   should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1805   if (should_log && !directive->LogOption) {
1806     should_log = false;
1807   }
1808 
1809   // Allocate a new set of JNI handles.
1810   push_jni_handle_block();
1811   Method* target_handle = task->method();
1812   int compilable = ciEnv::MethodCompilable;
1813   const char* failure_reason = NULL;
1814   const char* retry_message = NULL;
1815   AbstractCompiler *comp = compiler(task_level);
1816 
1817   int system_dictionary_modification_counter;
1818   {
1819     MutexLocker locker(Compile_lock, thread);
1820     system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1821   }
1822 #if INCLUDE_JVMCI
1823   if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1824     JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1825 
1826     TraceTime t1("compilation", &time);
1827     EventCompilation event;
1828 
1829     JVMCIEnv env(task, system_dictionary_modification_counter);
1830     methodHandle method(thread, target_handle);
1831     jvmci->compile_method(method, osr_bci, &env);
1832 
1833     post_compile(thread, task, event, task->code() != NULL, NULL);
1834 
1835     failure_reason = env.failure_reason();
1836     if (!env.retryable()) {
1837       retry_message = "not retryable";
1838       compilable = ciEnv::MethodCompilable_not_at_tier;
1839     }
1840 
1841   } else
1842 #endif // INCLUDE_JVMCI
1843   {
1844     NoHandleMark  nhm;
1845     ThreadToNativeFromVM ttn(thread);
1846 
1847     ciEnv ci_env(task, system_dictionary_modification_counter);
1848     if (should_break) {
1849       ci_env.set_break_at_compile(true);
1850     }
1851     if (should_log) {
1852       ci_env.set_log(thread->log());
1853     }
1854     assert(thread->env() == &ci_env, "set by ci_env");
1855     // The thread-env() field is cleared in ~CompileTaskWrapper.
1856 
1857     // Cache Jvmti state
1858     ci_env.cache_jvmti_state();
1859 
1860     // Cache DTrace flags
1861     ci_env.cache_dtrace_flags();
1862 
1863     ciMethod* target = ci_env.get_method_from_handle(target_handle);
1864 
1865     TraceTime t1("compilation", &time);
1866     EventCompilation event;
1867 
1868     if (comp == NULL) {
1869       ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1870     } else {
1871       if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1872         MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1873         while (WhiteBox::compilation_locked) {
1874           locker.wait(Mutex::_no_safepoint_check_flag);
1875         }
1876       }
1877       comp->compile_method(&ci_env, target, osr_bci, directive);
1878     }
1879 
1880     if (!ci_env.failing() && task->code() == NULL) {
1881       //assert(false, "compiler should always document failure");
1882       // The compiler elected, without comment, not to register a result.
1883       // Do not attempt further compilations of this method.
1884       ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1885     }
1886 
1887     // Copy this bit to the enclosing block:
1888     compilable = ci_env.compilable();
1889 
1890     if (ci_env.failing()) {
1891       failure_reason = ci_env.failure_reason();
1892       retry_message = ci_env.retry_message();
1893       ci_env.report_failure(failure_reason);
1894     }
1895 
1896     post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1897   }
1898   // Remove the JNI handle block after the ciEnv destructor has run in
1899   // the previous block.
1900   pop_jni_handle_block();
1901 
1902   if (failure_reason != NULL) {
1903     task->set_failure_reason(failure_reason);
1904     if (_compilation_log != NULL) {
1905       _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1906     }
1907     if (PrintCompilation) {
1908       FormatBufferResource msg = retry_message != NULL ?
1909         FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1910         FormatBufferResource("COMPILE SKIPPED: %s",      failure_reason);
1911       task->print(tty, msg);
1912     }
1913   }
1914 
1915   methodHandle method(thread, task->method());
1916 
1917   DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1918 
1919   collect_statistics(thread, time, task);
1920 
1921   nmethod* nm = task->code();
1922   if (nm != NULL) {
1923     nm->maybe_print_nmethod(directive);
1924   }
1925   DirectivesStack::release(directive);
1926 
1927   if (PrintCompilation && PrintCompilation2) {
1928     tty->print("%7d ", (int) tty->time_stamp().milliseconds());  // print timestamp
1929     tty->print("%4d ", compile_id);    // print compilation number
1930     tty->print("%s ", (is_osr ? "%" : " "));
1931     if (task->code() != NULL) {
1932       tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1933     }
1934     tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1935   }
1936 
1937   if (PrintCodeCacheOnCompilation)
1938     codecache_print(/* detailed= */ false);
1939 
1940   // Disable compilation, if required.
1941   switch (compilable) {
1942   case ciEnv::MethodCompilable_never:
1943     if (is_osr)
1944       method->set_not_osr_compilable_quietly();
1945     else
1946       method->set_not_compilable_quietly();
1947     break;
1948   case ciEnv::MethodCompilable_not_at_tier:
1949     if (is_osr)
1950       method->set_not_osr_compilable_quietly(task_level);
1951     else
1952       method->set_not_compilable_quietly(task_level);
1953     break;
1954   }
1955 
1956   // Note that the queued_for_compilation bits are cleared without
1957   // protection of a mutex. [They were set by the requester thread,
1958   // when adding the task to the compile queue -- at which time the
1959   // compile queue lock was held. Subsequently, we acquired the compile
1960   // queue lock to get this task off the compile queue; thus (to belabour
1961   // the point somewhat) our clearing of the bits must be occurring
1962   // only after the setting of the bits. See also 14012000 above.
1963   method->clear_queued_for_compilation();
1964 
1965 #ifdef ASSERT
1966   if (CollectedHeap::fired_fake_oom()) {
1967     // The current compile received a fake OOM during compilation so
1968     // go ahead and exit the VM since the test apparently succeeded
1969     tty->print_cr("*** Shutting down VM after successful fake OOM");
1970     vm_exit(0);
1971   }
1972 #endif
1973 }
1974 
1975 /**
1976  * The CodeCache is full. Print warning and disable compilation.
1977  * Schedule code cache cleaning so compilation can continue later.
1978  * This function needs to be called only from CodeCache::allocate(),
1979  * since we currently handle a full code cache uniformly.
1980  */
1981 void CompileBroker::handle_full_code_cache(int code_blob_type) {
1982   UseInterpreter = true;
1983   if (UseCompiler || AlwaysCompileLoopMethods ) {
1984     if (xtty != NULL) {
1985       ResourceMark rm;
1986       stringStream s;
1987       // Dump code cache state into a buffer before locking the tty,
1988       // because log_state() will use locks causing lock conflicts.
1989       CodeCache::log_state(&s);
1990       // Lock to prevent tearing
1991       ttyLocker ttyl;
1992       xtty->begin_elem("code_cache_full");
1993       xtty->print("%s", s.as_string());
1994       xtty->stamp();
1995       xtty->end_elem();
1996     }
1997 
1998 #ifndef PRODUCT
1999     if (CompileTheWorld || ExitOnFullCodeCache) {
2000       codecache_print(/* detailed= */ true);
2001       before_exit(JavaThread::current());
2002       exit_globals(); // will delete tty
2003       vm_direct_exit(CompileTheWorld ? 0 : 1);
2004     }
2005 #endif
2006     if (UseCodeCacheFlushing) {
2007       // Since code cache is full, immediately stop new compiles
2008       if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2009         NMethodSweeper::log_sweep("disable_compiler");
2010       }
2011     } else {
2012       disable_compilation_forever();
2013     }
2014 
2015     CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2016   }
2017 }
2018 
2019 // ------------------------------------------------------------------
2020 // CompileBroker::set_last_compile
2021 //
2022 // Record this compilation for debugging purposes.
2023 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2024   ResourceMark rm;
2025   char* method_name = method->name()->as_C_string();
2026   strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2027   _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2028   char current_method[CompilerCounters::cmname_buffer_length];
2029   size_t maxLen = CompilerCounters::cmname_buffer_length;
2030 
2031   if (UsePerfData) {
2032     const char* class_name = method->method_holder()->name()->as_C_string();
2033 
2034     size_t s1len = strlen(class_name);
2035     size_t s2len = strlen(method_name);
2036 
2037     // check if we need to truncate the string
2038     if (s1len + s2len + 2 > maxLen) {
2039 
2040       // the strategy is to lop off the leading characters of the
2041       // class name and the trailing characters of the method name.
2042 
2043       if (s2len + 2 > maxLen) {
2044         // lop of the entire class name string, let snprintf handle
2045         // truncation of the method name.
2046         class_name += s1len; // null string
2047       }
2048       else {
2049         // lop off the extra characters from the front of the class name
2050         class_name += ((s1len + s2len + 2) - maxLen);
2051       }
2052     }
2053 
2054     jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2055   }
2056 
2057   if (CICountOSR && is_osr) {
2058     _last_compile_type = osr_compile;
2059   } else {
2060     _last_compile_type = normal_compile;
2061   }
2062   _last_compile_level = comp_level;
2063 
2064   if (UsePerfData) {
2065     CompilerCounters* counters = thread->counters();
2066     counters->set_current_method(current_method);
2067     counters->set_compile_type((jlong)_last_compile_type);
2068   }
2069 }
2070 
2071 
2072 // ------------------------------------------------------------------
2073 // CompileBroker::push_jni_handle_block
2074 //
2075 // Push on a new block of JNI handles.
2076 void CompileBroker::push_jni_handle_block() {
2077   JavaThread* thread = JavaThread::current();
2078 
2079   // Allocate a new block for JNI handles.
2080   // Inlined code from jni_PushLocalFrame()
2081   JNIHandleBlock* java_handles = thread->active_handles();
2082   JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2083   assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2084   compile_handles->set_pop_frame_link(java_handles);  // make sure java handles get gc'd.
2085   thread->set_active_handles(compile_handles);
2086 }
2087 
2088 
2089 // ------------------------------------------------------------------
2090 // CompileBroker::pop_jni_handle_block
2091 //
2092 // Pop off the current block of JNI handles.
2093 void CompileBroker::pop_jni_handle_block() {
2094   JavaThread* thread = JavaThread::current();
2095 
2096   // Release our JNI handle block
2097   JNIHandleBlock* compile_handles = thread->active_handles();
2098   JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2099   thread->set_active_handles(java_handles);
2100   compile_handles->set_pop_frame_link(NULL);
2101   JNIHandleBlock::release_block(compile_handles, thread); // may block
2102 }
2103 
2104 // ------------------------------------------------------------------
2105 // CompileBroker::collect_statistics
2106 //
2107 // Collect statistics about the compilation.
2108 
2109 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2110   bool success = task->is_success();
2111   methodHandle method (thread, task->method());
2112   uint compile_id = task->compile_id();
2113   bool is_osr = (task->osr_bci() != standard_entry_bci);
2114   nmethod* code = task->code();
2115   CompilerCounters* counters = thread->counters();
2116 
2117   assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2118   MutexLocker locker(CompileStatistics_lock);
2119 
2120   // _perf variables are production performance counters which are
2121   // updated regardless of the setting of the CITime and CITimeEach flags
2122   //
2123 
2124   // account all time, including bailouts and failures in this counter;
2125   // C1 and C2 counters are counting both successful and unsuccessful compiles
2126   _t_total_compilation.add(time);
2127 
2128   if (!success) {
2129     _total_bailout_count++;
2130     if (UsePerfData) {
2131       _perf_last_failed_method->set_value(counters->current_method());
2132       _perf_last_failed_type->set_value(counters->compile_type());
2133       _perf_total_bailout_count->inc();
2134     }
2135     _t_bailedout_compilation.add(time);
2136   } else if (code == NULL) {
2137     if (UsePerfData) {
2138       _perf_last_invalidated_method->set_value(counters->current_method());
2139       _perf_last_invalidated_type->set_value(counters->compile_type());
2140       _perf_total_invalidated_count->inc();
2141     }
2142     _total_invalidated_count++;
2143     _t_invalidated_compilation.add(time);
2144   } else {
2145     // Compilation succeeded
2146 
2147     // update compilation ticks - used by the implementation of
2148     // java.lang.management.CompilationMBean
2149     _perf_total_compilation->inc(time.ticks());
2150     _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2151 
2152     if (CITime) {
2153       int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2154       if (is_osr) {
2155         _t_osr_compilation.add(time);
2156         _sum_osr_bytes_compiled += bytes_compiled;
2157       } else {
2158         _t_standard_compilation.add(time);
2159         _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2160       }
2161 
2162 #if INCLUDE_JVMCI
2163       AbstractCompiler* comp = compiler(task->comp_level());
2164       if (comp) {
2165         CompilerStatistics* stats = comp->stats();
2166         if (stats) {
2167           if (is_osr) {
2168             stats->_osr.update(time, bytes_compiled);
2169           } else {
2170             stats->_standard.update(time, bytes_compiled);
2171           }
2172           stats->_nmethods_size += code->total_size();
2173           stats->_nmethods_code_size += code->insts_size();
2174         } else { // if (!stats)
2175           assert(false, "Compiler statistics object must exist");
2176         }
2177       } else { // if (!comp)
2178         assert(false, "Compiler object must exist");
2179       }
2180 #endif // INCLUDE_JVMCI
2181     }
2182 
2183     if (UsePerfData) {
2184       // save the name of the last method compiled
2185       _perf_last_method->set_value(counters->current_method());
2186       _perf_last_compile_type->set_value(counters->compile_type());
2187       _perf_last_compile_size->set_value(method->code_size() +
2188                                          task->num_inlined_bytecodes());
2189       if (is_osr) {
2190         _perf_osr_compilation->inc(time.ticks());
2191         _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2192       } else {
2193         _perf_standard_compilation->inc(time.ticks());
2194         _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2195       }
2196     }
2197 
2198     if (CITimeEach) {
2199       float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2200       tty->print_cr("%3d   seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2201                     compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2202     }
2203 
2204     // Collect counts of successful compilations
2205     _sum_nmethod_size      += code->total_size();
2206     _sum_nmethod_code_size += code->insts_size();
2207     _total_compile_count++;
2208 
2209     if (UsePerfData) {
2210       _perf_sum_nmethod_size->inc(     code->total_size());
2211       _perf_sum_nmethod_code_size->inc(code->insts_size());
2212       _perf_total_compile_count->inc();
2213     }
2214 
2215     if (is_osr) {
2216       if (UsePerfData) _perf_total_osr_compile_count->inc();
2217       _total_osr_compile_count++;
2218     } else {
2219       if (UsePerfData) _perf_total_standard_compile_count->inc();
2220       _total_standard_compile_count++;
2221     }
2222   }
2223   // set the current method for the thread to null
2224   if (UsePerfData) counters->set_current_method("");
2225 }
2226 
2227 const char* CompileBroker::compiler_name(int comp_level) {
2228   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2229   if (comp == NULL) {
2230     return "no compiler";
2231   } else {
2232     return (comp->name());
2233   }
2234 }
2235 
2236 #if INCLUDE_JVMCI
2237 void CompileBroker::print_times(AbstractCompiler* comp) {
2238   CompilerStatistics* stats = comp->stats();
2239   if (stats) {
2240     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}",
2241                 comp->name(), stats->bytes_per_second(),
2242                 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2243                 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2244                 stats->_nmethods_size, stats->_nmethods_code_size);
2245   } else { // if (!stats)
2246     assert(false, "Compiler statistics object must exist");
2247   }
2248   comp->print_timers();
2249 }
2250 #endif // INCLUDE_JVMCI
2251 
2252 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2253 #if INCLUDE_JVMCI
2254   elapsedTimer standard_compilation;
2255   elapsedTimer total_compilation;
2256   elapsedTimer osr_compilation;
2257 
2258   int standard_bytes_compiled = 0;
2259   int osr_bytes_compiled = 0;
2260 
2261   int standard_compile_count = 0;
2262   int osr_compile_count = 0;
2263   int total_compile_count = 0;
2264 
2265   int nmethods_size = 0;
2266   int nmethods_code_size = 0;
2267   bool printedHeader = false;
2268 
2269   for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2270     AbstractCompiler* comp = _compilers[i];
2271     if (comp != NULL) {
2272       if (per_compiler && aggregate && !printedHeader) {
2273         printedHeader = true;
2274         tty->cr();
2275         tty->print_cr("Individual compiler times (for compiled methods only)");
2276         tty->print_cr("------------------------------------------------");
2277         tty->cr();
2278       }
2279       CompilerStatistics* stats = comp->stats();
2280 
2281       if (stats) {
2282         standard_compilation.add(stats->_standard._time);
2283         osr_compilation.add(stats->_osr._time);
2284 
2285         standard_bytes_compiled += stats->_standard._bytes;
2286         osr_bytes_compiled += stats->_osr._bytes;
2287 
2288         standard_compile_count += stats->_standard._count;
2289         osr_compile_count += stats->_osr._count;
2290 
2291         nmethods_size += stats->_nmethods_size;
2292         nmethods_code_size += stats->_nmethods_code_size;
2293       } else { // if (!stats)
2294         assert(false, "Compiler statistics object must exist");
2295       }
2296 
2297       if (per_compiler) {
2298         print_times(comp);
2299       }
2300     }
2301   }
2302   total_compile_count = osr_compile_count + standard_compile_count;
2303   total_compilation.add(osr_compilation);
2304   total_compilation.add(standard_compilation);
2305 
2306   // In hosted mode, print the JVMCI compiler specific counters manually.
2307   if (!UseJVMCICompiler) {
2308     JVMCICompiler::print_compilation_timers();
2309   }
2310 #else // INCLUDE_JVMCI
2311   elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2312   elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2313   elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2314 
2315   int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2316   int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2317 
2318   int standard_compile_count = CompileBroker::_total_standard_compile_count;
2319   int osr_compile_count = CompileBroker::_total_osr_compile_count;
2320   int total_compile_count = CompileBroker::_total_compile_count;
2321 
2322   int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2323   int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2324 #endif // INCLUDE_JVMCI
2325 
2326   if (!aggregate) {
2327     return;
2328   }
2329   tty->cr();
2330   tty->print_cr("Accumulated compiler times");
2331   tty->print_cr("----------------------------------------------------------");
2332                //0000000000111111111122222222223333333333444444444455555555556666666666
2333                //0123456789012345678901234567890123456789012345678901234567890123456789
2334   tty->print_cr("  Total compilation time   : %7.3f s", total_compilation.seconds());
2335   tty->print_cr("    Standard compilation   : %7.3f s, Average : %2.3f s",
2336                 standard_compilation.seconds(),
2337                 standard_compilation.seconds() / standard_compile_count);
2338   tty->print_cr("    Bailed out compilation : %7.3f s, Average : %2.3f s",
2339                 CompileBroker::_t_bailedout_compilation.seconds(),
2340                 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2341   tty->print_cr("    On stack replacement   : %7.3f s, Average : %2.3f s",
2342                 osr_compilation.seconds(),
2343                 osr_compilation.seconds() / osr_compile_count);
2344   tty->print_cr("    Invalidated            : %7.3f s, Average : %2.3f s",
2345                 CompileBroker::_t_invalidated_compilation.seconds(),
2346                 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2347 
2348   AbstractCompiler *comp = compiler(CompLevel_simple);
2349   if (comp != NULL) {
2350     tty->cr();
2351     comp->print_timers();
2352   }
2353   comp = compiler(CompLevel_full_optimization);
2354   if (comp != NULL) {
2355     tty->cr();
2356     comp->print_timers();
2357   }
2358   tty->cr();
2359   tty->print_cr("  Total compiled methods    : %8d methods", total_compile_count);
2360   tty->print_cr("    Standard compilation    : %8d methods", standard_compile_count);
2361   tty->print_cr("    On stack replacement    : %8d methods", osr_compile_count);
2362   int tcb = osr_bytes_compiled + standard_bytes_compiled;
2363   tty->print_cr("  Total compiled bytecodes  : %8d bytes", tcb);
2364   tty->print_cr("    Standard compilation    : %8d bytes", standard_bytes_compiled);
2365   tty->print_cr("    On stack replacement    : %8d bytes", osr_bytes_compiled);
2366   double tcs = total_compilation.seconds();
2367   int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2368   tty->print_cr("  Average compilation speed : %8d bytes/s", bps);
2369   tty->cr();
2370   tty->print_cr("  nmethod code size         : %8d bytes", nmethods_code_size);
2371   tty->print_cr("  nmethod total size        : %8d bytes", nmethods_size);
2372 }
2373 
2374 // Debugging output for failure
2375 void CompileBroker::print_last_compile() {
2376   if ( _last_compile_level != CompLevel_none &&
2377        compiler(_last_compile_level) != NULL &&
2378        _last_method_compiled != NULL &&
2379        _last_compile_type != no_compile) {
2380     if (_last_compile_type == osr_compile) {
2381       tty->print_cr("Last parse:  [osr]%d+++(%d) %s",
2382                     _osr_compilation_id, _last_compile_level, _last_method_compiled);
2383     } else {
2384       tty->print_cr("Last parse:  %d+++(%d) %s",
2385                     _compilation_id, _last_compile_level, _last_method_compiled);
2386     }
2387   }
2388 }
2389 
--- EOF ---