1 /*
   2  * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/symbolTable.hpp"
  27 #include "classfile/systemDictionary.hpp"
  28 #include "classfile/vmSymbols.hpp"
  29 #include "code/codeCache.hpp"
  30 #include "code/dependencyContext.hpp"
  31 #include "compiler/compileBroker.hpp"
  32 #include "compiler/compileLog.hpp"
  33 #include "compiler/compilerOracle.hpp"
  34 #include "compiler/directivesParser.hpp"
  35 #include "interpreter/linkResolver.hpp"
  36 #include "memory/allocation.inline.hpp"
  37 #include "memory/resourceArea.hpp"
  38 #include "oops/methodData.hpp"
  39 #include "oops/method.hpp"
  40 #include "oops/oop.inline.hpp"
  41 #include "prims/nativeLookup.hpp"
  42 #include "prims/whitebox.hpp"
  43 #include "runtime/arguments.hpp"
  44 #include "runtime/atomic.inline.hpp"
  45 #include "runtime/compilationPolicy.hpp"
  46 #include "runtime/init.hpp"
  47 #include "runtime/interfaceSupport.hpp"
  48 #include "runtime/javaCalls.hpp"
  49 #include "runtime/os.hpp"
  50 #include "runtime/sharedRuntime.hpp"
  51 #include "runtime/sweeper.hpp"
  52 #include "runtime/timerTrace.hpp"
  53 #include "trace/tracing.hpp"
  54 #include "utilities/dtrace.hpp"
  55 #include "utilities/events.hpp"
  56 #ifdef COMPILER1
  57 #include "c1/c1_Compiler.hpp"
  58 #endif
  59 #if INCLUDE_JVMCI
  60 #include "jvmci/jvmciCompiler.hpp"
  61 #include "jvmci/jvmciRuntime.hpp"
  62 #include "jvmci/jvmciJavaClasses.hpp"
  63 #include "runtime/vframe.hpp"
  64 #endif
  65 #ifdef COMPILER2
  66 #include "opto/c2compiler.hpp"
  67 #endif
  68 #ifdef SHARK
  69 #include "shark/sharkCompiler.hpp"
  70 #endif
  71 
  72 #ifdef DTRACE_ENABLED
  73 
  74 // Only bother with this argument setup if dtrace is available
  75 
  76 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)             \
  77   {                                                                      \
  78     Symbol* klass_name = (method)->klass_name();                         \
  79     Symbol* name = (method)->name();                                     \
  80     Symbol* signature = (method)->signature();                           \
  81     HOTSPOT_METHOD_COMPILE_BEGIN(                                        \
  82       (char *) comp_name, strlen(comp_name),                             \
  83       (char *) klass_name->bytes(), klass_name->utf8_length(),           \
  84       (char *) name->bytes(), name->utf8_length(),                       \
  85       (char *) signature->bytes(), signature->utf8_length());            \
  86   }
  87 
  88 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)      \
  89   {                                                                      \
  90     Symbol* klass_name = (method)->klass_name();                         \
  91     Symbol* name = (method)->name();                                     \
  92     Symbol* signature = (method)->signature();                           \
  93     HOTSPOT_METHOD_COMPILE_END(                                          \
  94       (char *) comp_name, strlen(comp_name),                             \
  95       (char *) klass_name->bytes(), klass_name->utf8_length(),           \
  96       (char *) name->bytes(), name->utf8_length(),                       \
  97       (char *) signature->bytes(), signature->utf8_length(), (success)); \
  98   }
  99 
 100 #else //  ndef DTRACE_ENABLED
 101 
 102 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
 103 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
 104 
 105 #endif // ndef DTRACE_ENABLED
 106 
 107 bool CompileBroker::_initialized = false;
 108 volatile bool CompileBroker::_should_block = false;
 109 volatile jint CompileBroker::_print_compilation_warning = 0;
 110 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
 111 
 112 // The installed compiler(s)
 113 AbstractCompiler* CompileBroker::_compilers[2];
 114 
 115 // These counters are used to assign an unique ID to each compilation.
 116 volatile jint CompileBroker::_compilation_id     = 0;
 117 volatile jint CompileBroker::_osr_compilation_id = 0;
 118 
 119 // Debugging information
 120 int  CompileBroker::_last_compile_type     = no_compile;
 121 int  CompileBroker::_last_compile_level    = CompLevel_none;
 122 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
 123 
 124 // Performance counters
 125 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
 126 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
 127 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
 128 
 129 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
 130 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
 131 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
 132 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
 133 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
 134 
 135 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
 136 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
 137 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
 138 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
 139 
 140 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
 141 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
 142 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
 143 PerfVariable*       CompileBroker::_perf_last_compile_type = NULL;
 144 PerfVariable*       CompileBroker::_perf_last_compile_size = NULL;
 145 PerfVariable*       CompileBroker::_perf_last_failed_type = NULL;
 146 PerfVariable*       CompileBroker::_perf_last_invalidated_type = NULL;
 147 
 148 // Timers and counters for generating statistics
 149 elapsedTimer CompileBroker::_t_total_compilation;
 150 elapsedTimer CompileBroker::_t_osr_compilation;
 151 elapsedTimer CompileBroker::_t_standard_compilation;
 152 elapsedTimer CompileBroker::_t_invalidated_compilation;
 153 elapsedTimer CompileBroker::_t_bailedout_compilation;
 154 
 155 int CompileBroker::_total_bailout_count          = 0;
 156 int CompileBroker::_total_invalidated_count      = 0;
 157 int CompileBroker::_total_compile_count          = 0;
 158 int CompileBroker::_total_osr_compile_count      = 0;
 159 int CompileBroker::_total_standard_compile_count = 0;
 160 
 161 int CompileBroker::_sum_osr_bytes_compiled       = 0;
 162 int CompileBroker::_sum_standard_bytes_compiled  = 0;
 163 int CompileBroker::_sum_nmethod_size             = 0;
 164 int CompileBroker::_sum_nmethod_code_size        = 0;
 165 
 166 long CompileBroker::_peak_compilation_time       = 0;
 167 
 168 CompileQueue* CompileBroker::_c2_compile_queue   = NULL;
 169 CompileQueue* CompileBroker::_c1_compile_queue   = NULL;
 170 
 171 
 172 
 173 class CompilationLog : public StringEventLog {
 174  public:
 175   CompilationLog() : StringEventLog("Compilation events") {
 176   }
 177 
 178   void log_compile(JavaThread* thread, CompileTask* task) {
 179     StringLogMessage lm;
 180     stringStream sstr = lm.stream();
 181     // msg.time_stamp().update_to(tty->time_stamp().ticks());
 182     task->print(&sstr, NULL, true, false);
 183     log(thread, "%s", (const char*)lm);
 184   }
 185 
 186   void log_nmethod(JavaThread* thread, nmethod* nm) {
 187     log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
 188         nm->compile_id(), nm->is_osr_method() ? "%" : "",
 189         p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
 190   }
 191 
 192   void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
 193     StringLogMessage lm;
 194     lm.print("%4d   COMPILE SKIPPED: %s", task->compile_id(), reason);
 195     if (retry_message != NULL) {
 196       lm.append(" (%s)", retry_message);
 197     }
 198     lm.print("\n");
 199     log(thread, "%s", (const char*)lm);
 200   }
 201 
 202   void log_metaspace_failure(const char* reason) {
 203     ResourceMark rm;
 204     StringLogMessage lm;
 205     lm.print("%4d   COMPILE PROFILING SKIPPED: %s", -1, reason);
 206     lm.print("\n");
 207     log(JavaThread::current(), "%s", (const char*)lm);
 208   }
 209 };
 210 
 211 static CompilationLog* _compilation_log = NULL;
 212 
 213 bool compileBroker_init() {
 214   if (LogEvents) {
 215     _compilation_log = new CompilationLog();
 216   }
 217 
 218   // init directives stack, adding default directive
 219   DirectivesStack::init();
 220 
 221   if (DirectivesParser::has_file()) {
 222     return DirectivesParser::parse_from_flag();
 223   } else if (CompilerDirectivesPrint) {
 224     // Print default directive even when no other was added
 225     DirectivesStack::print(tty);
 226   }
 227 
 228   return true;
 229 }
 230 
 231 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
 232   CompilerThread* thread = CompilerThread::current();
 233   thread->set_task(task);
 234 #if INCLUDE_JVMCI
 235   if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
 236     task->set_jvmci_compiler_thread(thread);
 237   }
 238 #endif
 239   CompileLog*     log  = thread->log();
 240   if (log != NULL)  task->log_task_start(log);
 241 }
 242 
 243 CompileTaskWrapper::~CompileTaskWrapper() {
 244   CompilerThread* thread = CompilerThread::current();
 245   CompileTask* task = thread->task();
 246   CompileLog*  log  = thread->log();
 247   if (log != NULL)  task->log_task_done(log);
 248   thread->set_task(NULL);
 249   task->set_code_handle(NULL);
 250   thread->set_env(NULL);
 251   if (task->is_blocking()) {
 252     bool free_task = false;
 253     {
 254       MutexLocker notifier(task->lock(), thread);
 255       task->mark_complete();
 256 #if INCLUDE_JVMCI
 257       if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
 258         if (!task->has_waiter()) {
 259           // The waiting thread timed out and thus did not free the task.
 260           free_task = true;
 261         }
 262         task->set_jvmci_compiler_thread(NULL);
 263       }
 264 #endif
 265       if (!free_task) {
 266         // Notify the waiting thread that the compilation has completed
 267         // so that it can free the task.
 268         task->lock()->notify_all();
 269       }
 270     }
 271     if (free_task) {
 272       // The task can only be freed once the task lock is released.
 273       CompileTask::free(task);
 274     }
 275   } else {
 276     task->mark_complete();
 277 
 278     // By convention, the compiling thread is responsible for
 279     // recycling a non-blocking CompileTask.
 280     CompileTask::free(task);
 281   }
 282 }
 283 
 284 /**
 285  * Add a CompileTask to a CompileQueue.
 286  */
 287 void CompileQueue::add(CompileTask* task) {
 288   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 289 
 290   task->set_next(NULL);
 291   task->set_prev(NULL);
 292 
 293   if (_last == NULL) {
 294     // The compile queue is empty.
 295     assert(_first == NULL, "queue is empty");
 296     _first = task;
 297     _last = task;
 298   } else {
 299     // Append the task to the queue.
 300     assert(_last->next() == NULL, "not last");
 301     _last->set_next(task);
 302     task->set_prev(_last);
 303     _last = task;
 304   }
 305   ++_size;
 306 
 307   // Mark the method as being in the compile queue.
 308   task->method()->set_queued_for_compilation();
 309 
 310   if (CIPrintCompileQueue) {
 311     print_tty();
 312   }
 313 
 314   if (LogCompilation && xtty != NULL) {
 315     task->log_task_queued();
 316   }
 317 
 318   // Notify CompilerThreads that a task is available.
 319   MethodCompileQueue_lock->notify_all();
 320 }
 321 
 322 /**
 323  * Empties compilation queue by putting all compilation tasks onto
 324  * a freelist. Furthermore, the method wakes up all threads that are
 325  * waiting on a compilation task to finish. This can happen if background
 326  * compilation is disabled.
 327  */
 328 void CompileQueue::free_all() {
 329   MutexLocker mu(MethodCompileQueue_lock);
 330   CompileTask* next = _first;
 331 
 332   // Iterate over all tasks in the compile queue
 333   while (next != NULL) {
 334     CompileTask* current = next;
 335     next = current->next();
 336     {
 337       // Wake up thread that blocks on the compile task.
 338       MutexLocker ct_lock(current->lock());
 339       current->lock()->notify();
 340     }
 341     // Put the task back on the freelist.
 342     CompileTask::free(current);
 343   }
 344   _first = NULL;
 345 
 346   // Wake up all threads that block on the queue.
 347   MethodCompileQueue_lock->notify_all();
 348 }
 349 
 350 /**
 351  * Get the next CompileTask from a CompileQueue
 352  */
 353 CompileTask* CompileQueue::get() {
 354   // save methods from RedefineClasses across safepoint
 355   // across MethodCompileQueue_lock below.
 356   methodHandle save_method;
 357   methodHandle save_hot_method;
 358 
 359   MutexLocker locker(MethodCompileQueue_lock);
 360   // If _first is NULL we have no more compile jobs. There are two reasons for
 361   // having no compile jobs: First, we compiled everything we wanted. Second,
 362   // we ran out of code cache so compilation has been disabled. In the latter
 363   // case we perform code cache sweeps to free memory such that we can re-enable
 364   // compilation.
 365   while (_first == NULL) {
 366     // Exit loop if compilation is disabled forever
 367     if (CompileBroker::is_compilation_disabled_forever()) {
 368       return NULL;
 369     }
 370 
 371     // If there are no compilation tasks and we can compile new jobs
 372     // (i.e., there is enough free space in the code cache) there is
 373     // no need to invoke the sweeper. As a result, the hotness of methods
 374     // remains unchanged. This behavior is desired, since we want to keep
 375     // the stable state, i.e., we do not want to evict methods from the
 376     // code cache if it is unnecessary.
 377     // We need a timed wait here, since compiler threads can exit if compilation
 378     // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
 379     // is not critical and we do not want idle compiler threads to wake up too often.
 380     MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
 381   }
 382 
 383   if (CompileBroker::is_compilation_disabled_forever()) {
 384     return NULL;
 385   }
 386 
 387   CompileTask* task;
 388   {
 389     NoSafepointVerifier nsv;
 390     task = CompilationPolicy::policy()->select_task(this);
 391   }
 392 
 393   if (task != NULL) {
 394     // Save method pointers across unlock safepoint.  The task is removed from
 395     // the compilation queue, which is walked during RedefineClasses.
 396     save_method = methodHandle(task->method());
 397     save_hot_method = methodHandle(task->hot_method());
 398 
 399     remove(task);
 400     purge_stale_tasks(); // may temporarily release MCQ lock
 401   }
 402 
 403   return task;
 404 }
 405 
 406 // Clean & deallocate stale compile tasks.
 407 // Temporarily releases MethodCompileQueue lock.
 408 void CompileQueue::purge_stale_tasks() {
 409   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 410   if (_first_stale != NULL) {
 411     // Stale tasks are purged when MCQ lock is released,
 412     // but _first_stale updates are protected by MCQ lock.
 413     // Once task processing starts and MCQ lock is released,
 414     // other compiler threads can reuse _first_stale.
 415     CompileTask* head = _first_stale;
 416     _first_stale = NULL;
 417     {
 418       MutexUnlocker ul(MethodCompileQueue_lock);
 419       for (CompileTask* task = head; task != NULL; ) {
 420         CompileTask* next_task = task->next();
 421         CompileTaskWrapper ctw(task); // Frees the task
 422         task->set_failure_reason("stale task");
 423         task = next_task;
 424       }
 425     }
 426   }
 427 }
 428 
 429 void CompileQueue::remove(CompileTask* task) {
 430    assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 431   if (task->prev() != NULL) {
 432     task->prev()->set_next(task->next());
 433   } else {
 434     // max is the first element
 435     assert(task == _first, "Sanity");
 436     _first = task->next();
 437   }
 438 
 439   if (task->next() != NULL) {
 440     task->next()->set_prev(task->prev());
 441   } else {
 442     // max is the last element
 443     assert(task == _last, "Sanity");
 444     _last = task->prev();
 445   }
 446   --_size;
 447 }
 448 
 449 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
 450   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 451   remove(task);
 452 
 453   // Enqueue the task for reclamation (should be done outside MCQ lock)
 454   task->set_next(_first_stale);
 455   task->set_prev(NULL);
 456   _first_stale = task;
 457 }
 458 
 459 // methods in the compile queue need to be marked as used on the stack
 460 // so that they don't get reclaimed by Redefine Classes
 461 void CompileQueue::mark_on_stack() {
 462   CompileTask* task = _first;
 463   while (task != NULL) {
 464     task->mark_on_stack();
 465     task = task->next();
 466   }
 467 }
 468 
 469 
 470 CompileQueue* CompileBroker::compile_queue(int comp_level) {
 471   if (is_c2_compile(comp_level)) return _c2_compile_queue;
 472   if (is_c1_compile(comp_level)) return _c1_compile_queue;
 473   return NULL;
 474 }
 475 
 476 void CompileBroker::print_compile_queues(outputStream* st) {
 477   st->print_cr("Current compiles: ");
 478   MutexLocker locker(MethodCompileQueue_lock);
 479 
 480   char buf[2000];
 481   int buflen = sizeof(buf);
 482   Threads::print_threads_compiling(st, buf, buflen);
 483 
 484   st->cr();
 485   if (_c1_compile_queue != NULL) {
 486     _c1_compile_queue->print(st);
 487   }
 488   if (_c2_compile_queue != NULL) {
 489     _c2_compile_queue->print(st);
 490   }
 491 }
 492 
 493 void CompileQueue::print(outputStream* st) {
 494   assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
 495   st->print_cr("%s:", name());
 496   CompileTask* task = _first;
 497   if (task == NULL) {
 498     st->print_cr("Empty");
 499   } else {
 500     while (task != NULL) {
 501       task->print(st, NULL, true, true);
 502       task = task->next();
 503     }
 504   }
 505   st->cr();
 506 }
 507 
 508 void CompileQueue::print_tty() {
 509   ttyLocker ttyl;
 510   print(tty);
 511 }
 512 
 513 CompilerCounters::CompilerCounters() {
 514   _current_method[0] = '\0';
 515   _compile_type = CompileBroker::no_compile;
 516 }
 517 
 518 // ------------------------------------------------------------------
 519 // CompileBroker::compilation_init
 520 //
 521 // Initialize the Compilation object
 522 void CompileBroker::compilation_init(TRAPS) {
 523   _last_method_compiled[0] = '\0';
 524 
 525   // No need to initialize compilation system if we do not use it.
 526   if (!UseCompiler) {
 527     return;
 528   }
 529 #ifndef SHARK
 530   // Set the interface to the current compiler(s).
 531   int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
 532   int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
 533 
 534 #if INCLUDE_JVMCI
 535   if (EnableJVMCI) {
 536     // This is creating a JVMCICompiler singleton.
 537     JVMCICompiler* jvmci = new JVMCICompiler();
 538 
 539     if (UseJVMCICompiler) {
 540       _compilers[1] = jvmci;
 541       if (FLAG_IS_DEFAULT(JVMCIThreads)) {
 542         if (BootstrapJVMCI) {
 543           // JVMCI will bootstrap so give it more threads
 544           c2_count = MIN2(32, os::active_processor_count());
 545         }
 546       } else {
 547         c2_count = JVMCIThreads;
 548       }
 549       if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
 550       } else {
 551         c1_count = JVMCIHostThreads;
 552       }
 553     }
 554   }
 555 #endif // INCLUDE_JVMCI
 556 
 557 #ifdef COMPILER1
 558   if (c1_count > 0) {
 559     _compilers[0] = new Compiler();
 560   }
 561 #endif // COMPILER1
 562 
 563 #ifdef COMPILER2
 564   if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
 565     if (c2_count > 0) {
 566       _compilers[1] = new C2Compiler();
 567     }
 568   }
 569 #endif // COMPILER2
 570 
 571 #else // SHARK
 572   int c1_count = 0;
 573   int c2_count = 1;
 574 
 575   _compilers[1] = new SharkCompiler();
 576 #endif // SHARK
 577 
 578   // Start the compiler thread(s) and the sweeper thread
 579   init_compiler_sweeper_threads(c1_count, c2_count);
 580   // totalTime performance counter is always created as it is required
 581   // by the implementation of java.lang.management.CompilationMBean.
 582   {
 583     EXCEPTION_MARK;
 584     _perf_total_compilation =
 585                  PerfDataManager::create_counter(JAVA_CI, "totalTime",
 586                                                  PerfData::U_Ticks, CHECK);
 587   }
 588 
 589   if (UsePerfData) {
 590 
 591     EXCEPTION_MARK;
 592 
 593     // create the jvmstat performance counters
 594     _perf_osr_compilation =
 595                  PerfDataManager::create_counter(SUN_CI, "osrTime",
 596                                                  PerfData::U_Ticks, CHECK);
 597 
 598     _perf_standard_compilation =
 599                  PerfDataManager::create_counter(SUN_CI, "standardTime",
 600                                                  PerfData::U_Ticks, CHECK);
 601 
 602     _perf_total_bailout_count =
 603                  PerfDataManager::create_counter(SUN_CI, "totalBailouts",
 604                                                  PerfData::U_Events, CHECK);
 605 
 606     _perf_total_invalidated_count =
 607                  PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
 608                                                  PerfData::U_Events, CHECK);
 609 
 610     _perf_total_compile_count =
 611                  PerfDataManager::create_counter(SUN_CI, "totalCompiles",
 612                                                  PerfData::U_Events, CHECK);
 613     _perf_total_osr_compile_count =
 614                  PerfDataManager::create_counter(SUN_CI, "osrCompiles",
 615                                                  PerfData::U_Events, CHECK);
 616 
 617     _perf_total_standard_compile_count =
 618                  PerfDataManager::create_counter(SUN_CI, "standardCompiles",
 619                                                  PerfData::U_Events, CHECK);
 620 
 621     _perf_sum_osr_bytes_compiled =
 622                  PerfDataManager::create_counter(SUN_CI, "osrBytes",
 623                                                  PerfData::U_Bytes, CHECK);
 624 
 625     _perf_sum_standard_bytes_compiled =
 626                  PerfDataManager::create_counter(SUN_CI, "standardBytes",
 627                                                  PerfData::U_Bytes, CHECK);
 628 
 629     _perf_sum_nmethod_size =
 630                  PerfDataManager::create_counter(SUN_CI, "nmethodSize",
 631                                                  PerfData::U_Bytes, CHECK);
 632 
 633     _perf_sum_nmethod_code_size =
 634                  PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
 635                                                  PerfData::U_Bytes, CHECK);
 636 
 637     _perf_last_method =
 638                  PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
 639                                        CompilerCounters::cmname_buffer_length,
 640                                        "", CHECK);
 641 
 642     _perf_last_failed_method =
 643             PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
 644                                        CompilerCounters::cmname_buffer_length,
 645                                        "", CHECK);
 646 
 647     _perf_last_invalidated_method =
 648         PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
 649                                      CompilerCounters::cmname_buffer_length,
 650                                      "", CHECK);
 651 
 652     _perf_last_compile_type =
 653              PerfDataManager::create_variable(SUN_CI, "lastType",
 654                                               PerfData::U_None,
 655                                               (jlong)CompileBroker::no_compile,
 656                                               CHECK);
 657 
 658     _perf_last_compile_size =
 659              PerfDataManager::create_variable(SUN_CI, "lastSize",
 660                                               PerfData::U_Bytes,
 661                                               (jlong)CompileBroker::no_compile,
 662                                               CHECK);
 663 
 664 
 665     _perf_last_failed_type =
 666              PerfDataManager::create_variable(SUN_CI, "lastFailedType",
 667                                               PerfData::U_None,
 668                                               (jlong)CompileBroker::no_compile,
 669                                               CHECK);
 670 
 671     _perf_last_invalidated_type =
 672          PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
 673                                           PerfData::U_None,
 674                                           (jlong)CompileBroker::no_compile,
 675                                           CHECK);
 676   }
 677 
 678   _initialized = true;
 679 }
 680 
 681 
 682 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
 683                                        AbstractCompiler* comp, bool compiler_thread, TRAPS) {
 684   JavaThread* thread = NULL;
 685   Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0);
 686   instanceKlassHandle klass (THREAD, k);
 687   instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
 688   Handle string = java_lang_String::create_from_str(name, CHECK_0);
 689 
 690   // Initialize thread_oop to put it into the system threadGroup
 691   Handle thread_group (THREAD,  Universe::system_thread_group());
 692   JavaValue result(T_VOID);
 693   JavaCalls::call_special(&result, thread_oop,
 694                        klass,
 695                        vmSymbols::object_initializer_name(),
 696                        vmSymbols::threadgroup_string_void_signature(),
 697                        thread_group,
 698                        string,
 699                        CHECK_0);
 700 
 701   {
 702     MutexLocker mu(Threads_lock, THREAD);
 703     if (compiler_thread) {
 704       thread = new CompilerThread(queue, counters);
 705     } else {
 706       thread = new CodeCacheSweeperThread();
 707     }
 708     // At this point the new CompilerThread data-races with this startup
 709     // thread (which I believe is the primoridal thread and NOT the VM
 710     // thread).  This means Java bytecodes being executed at startup can
 711     // queue compile jobs which will run at whatever default priority the
 712     // newly created CompilerThread runs at.
 713 
 714 
 715     // At this point it may be possible that no osthread was created for the
 716     // JavaThread due to lack of memory. We would have to throw an exception
 717     // in that case. However, since this must work and we do not allow
 718     // exceptions anyway, check and abort if this fails.
 719 
 720     if (thread == NULL || thread->osthread() == NULL) {
 721       vm_exit_during_initialization("java.lang.OutOfMemoryError",
 722                                     os::native_thread_creation_failed_msg());
 723     }
 724 
 725     java_lang_Thread::set_thread(thread_oop(), thread);
 726 
 727     // Note that this only sets the JavaThread _priority field, which by
 728     // definition is limited to Java priorities and not OS priorities.
 729     // The os-priority is set in the CompilerThread startup code itself
 730 
 731     java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
 732 
 733     // Note that we cannot call os::set_priority because it expects Java
 734     // priorities and we are *explicitly* using OS priorities so that it's
 735     // possible to set the compiler thread priority higher than any Java
 736     // thread.
 737 
 738     int native_prio = CompilerThreadPriority;
 739     if (native_prio == -1) {
 740       if (UseCriticalCompilerThreadPriority) {
 741         native_prio = os::java_to_os_priority[CriticalPriority];
 742       } else {
 743         native_prio = os::java_to_os_priority[NearMaxPriority];
 744       }
 745     }
 746     os::set_native_priority(thread, native_prio);
 747 
 748     java_lang_Thread::set_daemon(thread_oop());
 749 
 750     thread->set_threadObj(thread_oop());
 751     if (compiler_thread) {
 752       thread->as_CompilerThread()->set_compiler(comp);
 753     }
 754     Threads::add(thread);
 755     Thread::start(thread);
 756   }
 757 
 758   // Let go of Threads_lock before yielding
 759   os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
 760 
 761   return thread;
 762 }
 763 
 764 
 765 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) {
 766   EXCEPTION_MARK;
 767 #if !defined(ZERO) && !defined(SHARK)
 768   assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
 769 #endif // !ZERO && !SHARK
 770   // Initialize the compilation queue
 771   if (c2_compiler_count > 0) {
 772     const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
 773     _c2_compile_queue  = new CompileQueue(name);
 774     _compilers[1]->set_num_compiler_threads(c2_compiler_count);
 775   }
 776   if (c1_compiler_count > 0) {
 777     _c1_compile_queue  = new CompileQueue("C1 compile queue");
 778     _compilers[0]->set_num_compiler_threads(c1_compiler_count);
 779   }
 780 
 781   int compiler_count = c1_compiler_count + c2_compiler_count;
 782 
 783   char name_buffer[256];
 784   const bool compiler_thread = true;
 785   for (int i = 0; i < c2_compiler_count; i++) {
 786     // Create a name for our thread.
 787     sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
 788     CompilerCounters* counters = new CompilerCounters();
 789     // Shark and C2
 790     make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK);
 791   }
 792 
 793   for (int i = c2_compiler_count; i < compiler_count; i++) {
 794     // Create a name for our thread.
 795     sprintf(name_buffer, "C1 CompilerThread%d", i);
 796     CompilerCounters* counters = new CompilerCounters();
 797     // C1
 798     make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK);
 799   }
 800 
 801   if (UsePerfData) {
 802     PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
 803   }
 804 
 805   if (MethodFlushing) {
 806     // Initialize the sweeper thread
 807     make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK);
 808   }
 809 }
 810 
 811 
 812 /**
 813  * Set the methods on the stack as on_stack so that redefine classes doesn't
 814  * reclaim them. This method is executed at a safepoint.
 815  */
 816 void CompileBroker::mark_on_stack() {
 817   assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
 818   // Since we are at a safepoint, we do not need a lock to access
 819   // the compile queues.
 820   if (_c2_compile_queue != NULL) {
 821     _c2_compile_queue->mark_on_stack();
 822   }
 823   if (_c1_compile_queue != NULL) {
 824     _c1_compile_queue->mark_on_stack();
 825   }
 826 }
 827 
 828 // ------------------------------------------------------------------
 829 // CompileBroker::compile_method
 830 //
 831 // Request compilation of a method.
 832 void CompileBroker::compile_method_base(const methodHandle& method,
 833                                         int osr_bci,
 834                                         int comp_level,
 835                                         const methodHandle& hot_method,
 836                                         int hot_count,
 837                                         CompileTask::CompileReason compile_reason,
 838                                         bool blocking,
 839                                         Thread* thread) {
 840   guarantee(!method->is_abstract(), "cannot compile abstract methods");
 841   assert(method->method_holder()->is_instance_klass(),
 842          "sanity check");
 843   assert(!method->method_holder()->is_not_initialized(),
 844          "method holder must be initialized");
 845   assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
 846 
 847   if (CIPrintRequests) {
 848     tty->print("request: ");
 849     method->print_short_name(tty);
 850     if (osr_bci != InvocationEntryBci) {
 851       tty->print(" osr_bci: %d", osr_bci);
 852     }
 853     tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
 854     if (!hot_method.is_null()) {
 855       tty->print(" hot: ");
 856       if (hot_method() != method()) {
 857           hot_method->print_short_name(tty);
 858       } else {
 859         tty->print("yes");
 860       }
 861     }
 862     tty->cr();
 863   }
 864 
 865   // A request has been made for compilation.  Before we do any
 866   // real work, check to see if the method has been compiled
 867   // in the meantime with a definitive result.
 868   if (compilation_is_complete(method, osr_bci, comp_level)) {
 869     return;
 870   }
 871 
 872 #ifndef PRODUCT
 873   if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
 874     if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
 875       // Positive OSROnlyBCI means only compile that bci.  Negative means don't compile that BCI.
 876       return;
 877     }
 878   }
 879 #endif
 880 
 881   // If this method is already in the compile queue, then
 882   // we do not block the current thread.
 883   if (compilation_is_in_queue(method)) {
 884     // We may want to decay our counter a bit here to prevent
 885     // multiple denied requests for compilation.  This is an
 886     // open compilation policy issue. Note: The other possibility,
 887     // in the case that this is a blocking compile request, is to have
 888     // all subsequent blocking requesters wait for completion of
 889     // ongoing compiles. Note that in this case we'll need a protocol
 890     // for freeing the associated compile tasks. [Or we could have
 891     // a single static monitor on which all these waiters sleep.]
 892     return;
 893   }
 894 
 895   if (TieredCompilation) {
 896     // Tiered policy requires MethodCounters to exist before adding a method to
 897     // the queue. Create if we don't have them yet.
 898     method->get_method_counters(thread);
 899   }
 900 
 901   // Outputs from the following MutexLocker block:
 902   CompileTask* task     = NULL;
 903   CompileQueue* queue  = compile_queue(comp_level);
 904 
 905   // Acquire our lock.
 906   {
 907     MutexLocker locker(MethodCompileQueue_lock, thread);
 908 
 909     // Make sure the method has not slipped into the queues since
 910     // last we checked; note that those checks were "fast bail-outs".
 911     // Here we need to be more careful, see 14012000 below.
 912     if (compilation_is_in_queue(method)) {
 913       return;
 914     }
 915 
 916     // We need to check again to see if the compilation has
 917     // completed.  A previous compilation may have registered
 918     // some result.
 919     if (compilation_is_complete(method, osr_bci, comp_level)) {
 920       return;
 921     }
 922 
 923     // We now know that this compilation is not pending, complete,
 924     // or prohibited.  Assign a compile_id to this compilation
 925     // and check to see if it is in our [Start..Stop) range.
 926     int compile_id = assign_compile_id(method, osr_bci);
 927     if (compile_id == 0) {
 928       // The compilation falls outside the allowed range.
 929       return;
 930     }
 931 
 932 #if INCLUDE_JVMCI
 933     if (UseJVMCICompiler) {
 934       if (blocking) {
 935         // Don't allow blocking compiles for requests triggered by JVMCI.
 936         if (thread->is_Compiler_thread()) {
 937           blocking = false;
 938         }
 939 
 940         // Don't allow blocking compiles if inside a class initializer or while performing class loading
 941         vframeStream vfst((JavaThread*) thread);
 942         for (; !vfst.at_end(); vfst.next()) {
 943           if (vfst.method()->is_static_initializer() ||
 944               (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
 945                   vfst.method()->name() == vmSymbols::loadClass_name())) {
 946             blocking = false;
 947             break;
 948           }
 949         }
 950 
 951         // Don't allow blocking compilation requests to JVMCI
 952         // if JVMCI itself is not yet initialized
 953         if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
 954           blocking = false;
 955         }
 956 
 957         // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
 958         // to avoid deadlock between compiler thread(s) and threads run at shutdown
 959         // such as the DestroyJavaVM thread.
 960         if (JVMCIRuntime::shutdown_called()) {
 961           blocking = false;
 962         }
 963       }
 964     }
 965 #endif // INCLUDE_JVMCI
 966 
 967     // We will enter the compilation in the queue.
 968     // 14012000: Note that this sets the queued_for_compile bits in
 969     // the target method. We can now reason that a method cannot be
 970     // queued for compilation more than once, as follows:
 971     // Before a thread queues a task for compilation, it first acquires
 972     // the compile queue lock, then checks if the method's queued bits
 973     // are set or it has already been compiled. Thus there can not be two
 974     // instances of a compilation task for the same method on the
 975     // compilation queue. Consider now the case where the compilation
 976     // thread has already removed a task for that method from the queue
 977     // and is in the midst of compiling it. In this case, the
 978     // queued_for_compile bits must be set in the method (and these
 979     // will be visible to the current thread, since the bits were set
 980     // under protection of the compile queue lock, which we hold now.
 981     // When the compilation completes, the compiler thread first sets
 982     // the compilation result and then clears the queued_for_compile
 983     // bits. Neither of these actions are protected by a barrier (or done
 984     // under the protection of a lock), so the only guarantee we have
 985     // (on machines with TSO (Total Store Order)) is that these values
 986     // will update in that order. As a result, the only combinations of
 987     // these bits that the current thread will see are, in temporal order:
 988     // <RESULT, QUEUE> :
 989     //     <0, 1> : in compile queue, but not yet compiled
 990     //     <1, 1> : compiled but queue bit not cleared
 991     //     <1, 0> : compiled and queue bit cleared
 992     // Because we first check the queue bits then check the result bits,
 993     // we are assured that we cannot introduce a duplicate task.
 994     // Note that if we did the tests in the reverse order (i.e. check
 995     // result then check queued bit), we could get the result bit before
 996     // the compilation completed, and the queue bit after the compilation
 997     // completed, and end up introducing a "duplicate" (redundant) task.
 998     // In that case, the compiler thread should first check if a method
 999     // has already been compiled before trying to compile it.
1000     // NOTE: in the event that there are multiple compiler threads and
1001     // there is de-optimization/recompilation, things will get hairy,
1002     // and in that case it's best to protect both the testing (here) of
1003     // these bits, and their updating (here and elsewhere) under a
1004     // common lock.
1005     task = create_compile_task(queue,
1006                                compile_id, method,
1007                                osr_bci, comp_level,
1008                                hot_method, hot_count, compile_reason,
1009                                blocking);
1010   }
1011 
1012   if (blocking) {
1013     wait_for_completion(task);
1014   }
1015 }
1016 
1017 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1018                                        int comp_level,
1019                                        const methodHandle& hot_method, int hot_count,
1020                                        CompileTask::CompileReason compile_reason,
1021                                        Thread* THREAD) {
1022   // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1023   if (!_initialized || comp_level == CompLevel_none) {
1024     return NULL;
1025   }
1026 
1027   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1028   assert(comp != NULL, "Ensure we have a compiler");
1029 
1030   DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1031   nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1032   DirectivesStack::release(directive);
1033   return nm;
1034 }
1035 
1036 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1037                                          int comp_level,
1038                                          const methodHandle& hot_method, int hot_count,
1039                                          CompileTask::CompileReason compile_reason,
1040                                          DirectiveSet* directive,
1041                                          Thread* THREAD) {
1042 
1043   // make sure arguments make sense
1044   assert(method->method_holder()->is_instance_klass(), "not an instance method");
1045   assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1046   assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1047   assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1048   assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1049   // allow any levels for WhiteBox
1050   assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1051   // return quickly if possible
1052 
1053   // lock, make sure that the compilation
1054   // isn't prohibited in a straightforward way.
1055   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1056   if (!comp->can_compile_method(method) ||
1057       compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1058     return NULL;
1059   }
1060 
1061 #if INCLUDE_JVMCI
1062   if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1063     return NULL;
1064   }
1065 #endif
1066 
1067   if (osr_bci == InvocationEntryBci) {
1068     // standard compilation
1069     CompiledMethod* method_code = method->code();
1070     if (method_code != NULL && method_code->is_nmethod()) {
1071       if (compilation_is_complete(method, osr_bci, comp_level)) {
1072         return (nmethod*) method_code;
1073       }
1074     }
1075     if (method->is_not_compilable(comp_level)) {
1076       return NULL;
1077     }
1078   } else {
1079     // osr compilation
1080 #ifndef TIERED
1081     // seems like an assert of dubious value
1082     assert(comp_level == CompLevel_highest_tier,
1083            "all OSR compiles are assumed to be at a single compilation level");
1084 #endif // TIERED
1085     // We accept a higher level osr method
1086     nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1087     if (nm != NULL) return nm;
1088     if (method->is_not_osr_compilable(comp_level)) return NULL;
1089   }
1090 
1091   assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1092   // some prerequisites that are compiler specific
1093   if (comp->is_c2() || comp->is_shark()) {
1094     method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1095     // Resolve all classes seen in the signature of the method
1096     // we are compiling.
1097     Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1098   }
1099 
1100   // If the method is native, do the lookup in the thread requesting
1101   // the compilation. Native lookups can load code, which is not
1102   // permitted during compilation.
1103   //
1104   // Note: A native method implies non-osr compilation which is
1105   //       checked with an assertion at the entry of this method.
1106   if (method->is_native() && !method->is_method_handle_intrinsic()) {
1107     bool in_base_library;
1108     address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1109     if (HAS_PENDING_EXCEPTION) {
1110       // In case of an exception looking up the method, we just forget
1111       // about it. The interpreter will kick-in and throw the exception.
1112       method->set_not_compilable(); // implies is_not_osr_compilable()
1113       CLEAR_PENDING_EXCEPTION;
1114       return NULL;
1115     }
1116     assert(method->has_native_function(), "must have native code by now");
1117   }
1118 
1119   // RedefineClasses() has replaced this method; just return
1120   if (method->is_old()) {
1121     return NULL;
1122   }
1123 
1124   // JVMTI -- post_compile_event requires jmethod_id() that may require
1125   // a lock the compiling thread can not acquire. Prefetch it here.
1126   if (JvmtiExport::should_post_compiled_method_load()) {
1127     method->jmethod_id();
1128   }
1129 
1130   // do the compilation
1131   if (method->is_native()) {
1132     if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1133       // The following native methods:
1134       //
1135       // java.lang.Float.intBitsToFloat
1136       // java.lang.Float.floatToRawIntBits
1137       // java.lang.Double.longBitsToDouble
1138       // java.lang.Double.doubleToRawLongBits
1139       //
1140       // are called through the interpreter even if interpreter native stubs
1141       // are not preferred (i.e., calling through adapter handlers is preferred).
1142       // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1143       // if the version of the methods from the native libraries is called.
1144       // As the interpreter and the C2-intrinsified version of the methods preserves
1145       // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1146       if ((UseSSE >= 1 &&
1147           (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1148            method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1149           (UseSSE >= 2 &&
1150            (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1151             method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1152         return NULL;
1153       }
1154 
1155       // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1156       // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1157       //
1158       // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1159       // in this case.  If we can't generate one and use it we can not execute the out-of-line method handle calls.
1160       AdapterHandlerLibrary::create_native_wrapper(method);
1161     } else {
1162       return NULL;
1163     }
1164   } else {
1165     // If the compiler is shut off due to code cache getting full
1166     // fail out now so blocking compiles dont hang the java thread
1167     if (!should_compile_new_jobs()) {
1168       CompilationPolicy::policy()->delay_compilation(method());
1169       return NULL;
1170     }
1171     bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1172     compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1173   }
1174 
1175   // return requested nmethod
1176   // We accept a higher level osr method
1177   if (osr_bci == InvocationEntryBci) {
1178     CompiledMethod* code = method->code();
1179     if (code == NULL) {
1180       return (nmethod*) code;
1181     } else {
1182       return code->as_nmethod_or_null();
1183     }
1184   }
1185   return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1186 }
1187 
1188 
1189 // ------------------------------------------------------------------
1190 // CompileBroker::compilation_is_complete
1191 //
1192 // See if compilation of this method is already complete.
1193 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1194                                             int                 osr_bci,
1195                                             int                 comp_level) {
1196   bool is_osr = (osr_bci != standard_entry_bci);
1197   if (is_osr) {
1198     if (method->is_not_osr_compilable(comp_level)) {
1199       return true;
1200     } else {
1201       nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1202       return (result != NULL);
1203     }
1204   } else {
1205     if (method->is_not_compilable(comp_level)) {
1206       return true;
1207     } else {
1208       CompiledMethod* result = method->code();
1209       if (result == NULL) return false;
1210       return comp_level == result->comp_level();
1211     }
1212   }
1213 }
1214 
1215 
1216 /**
1217  * See if this compilation is already requested.
1218  *
1219  * Implementation note: there is only a single "is in queue" bit
1220  * for each method.  This means that the check below is overly
1221  * conservative in the sense that an osr compilation in the queue
1222  * will block a normal compilation from entering the queue (and vice
1223  * versa).  This can be remedied by a full queue search to disambiguate
1224  * cases.  If it is deemed profitable, this may be done.
1225  */
1226 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1227   return method->queued_for_compilation();
1228 }
1229 
1230 // ------------------------------------------------------------------
1231 // CompileBroker::compilation_is_prohibited
1232 //
1233 // See if this compilation is not allowed.
1234 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1235   bool is_native = method->is_native();
1236   // Some compilers may not support the compilation of natives.
1237   AbstractCompiler *comp = compiler(comp_level);
1238   if (is_native &&
1239       (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1240     method->set_not_compilable_quietly(comp_level);
1241     return true;
1242   }
1243 
1244   bool is_osr = (osr_bci != standard_entry_bci);
1245   // Some compilers may not support on stack replacement.
1246   if (is_osr &&
1247       (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1248     method->set_not_osr_compilable(comp_level);
1249     return true;
1250   }
1251 
1252   // The method may be explicitly excluded by the user.
1253   double scale;
1254   if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1255     bool quietly = CompilerOracle::should_exclude_quietly();
1256     if (PrintCompilation && !quietly) {
1257       // This does not happen quietly...
1258       ResourceMark rm;
1259       tty->print("### Excluding %s:%s",
1260                  method->is_native() ? "generation of native wrapper" : "compile",
1261                  (method->is_static() ? " static" : ""));
1262       method->print_short_name(tty);
1263       tty->cr();
1264     }
1265     method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1266   }
1267 
1268   return false;
1269 }
1270 
1271 /**
1272  * Generate serialized IDs for compilation requests. If certain debugging flags are used
1273  * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1274  * The function also allows to generate separate compilation IDs for OSR compilations.
1275  */
1276 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1277 #ifdef ASSERT
1278   bool is_osr = (osr_bci != standard_entry_bci);
1279   int id;
1280   if (method->is_native()) {
1281     assert(!is_osr, "can't be osr");
1282     // Adapters, native wrappers and method handle intrinsics
1283     // should be generated always.
1284     return Atomic::add(1, &_compilation_id);
1285   } else if (CICountOSR && is_osr) {
1286     id = Atomic::add(1, &_osr_compilation_id);
1287     if (CIStartOSR <= id && id < CIStopOSR) {
1288       return id;
1289     }
1290   } else {
1291     id = Atomic::add(1, &_compilation_id);
1292     if (CIStart <= id && id < CIStop) {
1293       return id;
1294     }
1295   }
1296 
1297   // Method was not in the appropriate compilation range.
1298   method->set_not_compilable_quietly();
1299   return 0;
1300 #else
1301   // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1302   // only _compilation_id is incremented.
1303   return Atomic::add(1, &_compilation_id);
1304 #endif
1305 }
1306 
1307 // ------------------------------------------------------------------
1308 // CompileBroker::assign_compile_id_unlocked
1309 //
1310 // Public wrapper for assign_compile_id that acquires the needed locks
1311 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1312   MutexLocker locker(MethodCompileQueue_lock, thread);
1313   return assign_compile_id(method, osr_bci);
1314 }
1315 
1316 // ------------------------------------------------------------------
1317 // CompileBroker::preload_classes
1318 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1319   // Move this code over from c1_Compiler.cpp
1320   ShouldNotReachHere();
1321 }
1322 
1323 
1324 // ------------------------------------------------------------------
1325 // CompileBroker::create_compile_task
1326 //
1327 // Create a CompileTask object representing the current request for
1328 // compilation.  Add this task to the queue.
1329 CompileTask* CompileBroker::create_compile_task(CompileQueue*       queue,
1330                                                 int                 compile_id,
1331                                                 const methodHandle& method,
1332                                                 int                 osr_bci,
1333                                                 int                 comp_level,
1334                                                 const methodHandle& hot_method,
1335                                                 int                 hot_count,
1336                                                 CompileTask::CompileReason compile_reason,
1337                                                 bool                blocking) {
1338   CompileTask* new_task = CompileTask::allocate();
1339   new_task->initialize(compile_id, method, osr_bci, comp_level,
1340                        hot_method, hot_count, compile_reason,
1341                        blocking);
1342   queue->add(new_task);
1343   return new_task;
1344 }
1345 
1346 #if INCLUDE_JVMCI
1347 // The number of milliseconds to wait before checking if
1348 // JVMCI compilation has made progress.
1349 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500;
1350 
1351 // The number of JVMCI compilation progress checks that must fail
1352 // before unblocking a thread waiting for a blocking compilation.
1353 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5;
1354 
1355 /**
1356  * Waits for a JVMCI compiler to complete a given task. This thread
1357  * waits until either the task completes or it sees no JVMCI compilation
1358  * progress for N consecutive milliseconds where N is
1359  * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1360  * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1361  *
1362  * @return true if this thread needs to free/recycle the task
1363  */
1364 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1365   MutexLocker waiter(task->lock(), thread);
1366   int progress_wait_attempts = 0;
1367   int methods_compiled = jvmci->methods_compiled();
1368   while (!task->is_complete() && !is_compilation_disabled_forever() &&
1369          task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1370     CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1371 
1372     bool progress;
1373     if (jvmci_compiler_thread != NULL) {
1374       // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1375       progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1376     } else {
1377       // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1378       // that all JVMCI compiler threads are blocked on. We use the counter for
1379       // successful JVMCI compilations to determine whether JVMCI compilation
1380       // is still making progress through the JVMCI compiler queue.
1381       progress = jvmci->methods_compiled() != methods_compiled;
1382     }
1383 
1384     if (!progress) {
1385       if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1386         if (PrintCompilation) {
1387           task->print(tty, "wait for blocking compilation timed out");
1388         }
1389         break;
1390       }
1391     } else {
1392       progress_wait_attempts = 0;
1393       if (jvmci_compiler_thread == NULL) {
1394         methods_compiled = jvmci->methods_compiled();
1395       }
1396     }
1397   }
1398   task->clear_waiter();
1399   return task->is_complete();
1400 }
1401 #endif
1402 
1403 /**
1404  *  Wait for the compilation task to complete.
1405  */
1406 void CompileBroker::wait_for_completion(CompileTask* task) {
1407   if (CIPrintCompileQueue) {
1408     ttyLocker ttyl;
1409     tty->print_cr("BLOCKING FOR COMPILE");
1410   }
1411 
1412   assert(task->is_blocking(), "can only wait on blocking task");
1413 
1414   JavaThread* thread = JavaThread::current();
1415   thread->set_blocked_on_compilation(true);
1416 
1417   methodHandle method(thread, task->method());
1418   bool free_task;
1419 #if INCLUDE_JVMCI
1420   AbstractCompiler* comp = compiler(task->comp_level());
1421   if (comp->is_jvmci()) {
1422     free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1423   } else
1424 #endif
1425   {
1426     MutexLocker waiter(task->lock(), thread);
1427     free_task = true;
1428     while (!task->is_complete() && !is_compilation_disabled_forever()) {
1429       task->lock()->wait();
1430     }
1431   }
1432 
1433   thread->set_blocked_on_compilation(false);
1434   if (free_task) {
1435     if (is_compilation_disabled_forever()) {
1436       CompileTask::free(task);
1437       return;
1438     }
1439 
1440     // It is harmless to check this status without the lock, because
1441     // completion is a stable property (until the task object is recycled).
1442     assert(task->is_complete(), "Compilation should have completed");
1443     assert(task->code_handle() == NULL, "must be reset");
1444 
1445     // By convention, the waiter is responsible for recycling a
1446     // blocking CompileTask. Since there is only one waiter ever
1447     // waiting on a CompileTask, we know that no one else will
1448     // be using this CompileTask; we can free it.
1449     CompileTask::free(task);
1450   }
1451 }
1452 
1453 /**
1454  * Initialize compiler thread(s) + compiler object(s). The postcondition
1455  * of this function is that the compiler runtimes are initialized and that
1456  * compiler threads can start compiling.
1457  */
1458 bool CompileBroker::init_compiler_runtime() {
1459   CompilerThread* thread = CompilerThread::current();
1460   AbstractCompiler* comp = thread->compiler();
1461   // Final sanity check - the compiler object must exist
1462   guarantee(comp != NULL, "Compiler object must exist");
1463 
1464   int system_dictionary_modification_counter;
1465   {
1466     MutexLocker locker(Compile_lock, thread);
1467     system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1468   }
1469 
1470   {
1471     // Must switch to native to allocate ci_env
1472     ThreadToNativeFromVM ttn(thread);
1473     ciEnv ci_env(NULL, system_dictionary_modification_counter);
1474     // Cache Jvmti state
1475     ci_env.cache_jvmti_state();
1476     // Cache DTrace flags
1477     ci_env.cache_dtrace_flags();
1478 
1479     // Switch back to VM state to do compiler initialization
1480     ThreadInVMfromNative tv(thread);
1481     ResetNoHandleMark rnhm;
1482 
1483     if (!comp->is_shark()) {
1484       // Perform per-thread and global initializations
1485       comp->initialize();
1486     }
1487   }
1488 
1489   if (comp->is_failed()) {
1490     disable_compilation_forever();
1491     // If compiler initialization failed, no compiler thread that is specific to a
1492     // particular compiler runtime will ever start to compile methods.
1493     shutdown_compiler_runtime(comp, thread);
1494     return false;
1495   }
1496 
1497   // C1 specific check
1498   if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1499     warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1500     return false;
1501   }
1502 
1503   return true;
1504 }
1505 
1506 /**
1507  * If C1 and/or C2 initialization failed, we shut down all compilation.
1508  * We do this to keep things simple. This can be changed if it ever turns
1509  * out to be a problem.
1510  */
1511 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1512   // Free buffer blob, if allocated
1513   if (thread->get_buffer_blob() != NULL) {
1514     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1515     CodeCache::free(thread->get_buffer_blob());
1516   }
1517 
1518   if (comp->should_perform_shutdown()) {
1519     // There are two reasons for shutting down the compiler
1520     // 1) compiler runtime initialization failed
1521     // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1522     warning("%s initialization failed. Shutting down all compilers", comp->name());
1523 
1524     // Only one thread per compiler runtime object enters here
1525     // Set state to shut down
1526     comp->set_shut_down();
1527 
1528     // Delete all queued compilation tasks to make compiler threads exit faster.
1529     if (_c1_compile_queue != NULL) {
1530       _c1_compile_queue->free_all();
1531     }
1532 
1533     if (_c2_compile_queue != NULL) {
1534       _c2_compile_queue->free_all();
1535     }
1536 
1537     // Set flags so that we continue execution with using interpreter only.
1538     UseCompiler    = false;
1539     UseInterpreter = true;
1540 
1541     // We could delete compiler runtimes also. However, there are references to
1542     // the compiler runtime(s) (e.g.,  nmethod::is_compiled_by_c1()) which then
1543     // fail. This can be done later if necessary.
1544   }
1545 }
1546 
1547 // ------------------------------------------------------------------
1548 // CompileBroker::compiler_thread_loop
1549 //
1550 // The main loop run by a CompilerThread.
1551 void CompileBroker::compiler_thread_loop() {
1552   CompilerThread* thread = CompilerThread::current();
1553   CompileQueue* queue = thread->queue();
1554   // For the thread that initializes the ciObjectFactory
1555   // this resource mark holds all the shared objects
1556   ResourceMark rm;
1557 
1558   // First thread to get here will initialize the compiler interface
1559 
1560   if (!ciObjectFactory::is_initialized()) {
1561     ASSERT_IN_VM;
1562     MutexLocker only_one (CompileThread_lock, thread);
1563     if (!ciObjectFactory::is_initialized()) {
1564       ciObjectFactory::initialize();
1565     }
1566   }
1567 
1568   // Open a log.
1569   if (LogCompilation) {
1570     init_compiler_thread_log();
1571   }
1572   CompileLog* log = thread->log();
1573   if (log != NULL) {
1574     log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1575                     thread->name(),
1576                     os::current_thread_id(),
1577                     os::current_process_id());
1578     log->stamp();
1579     log->end_elem();
1580   }
1581 
1582   // If compiler thread/runtime initialization fails, exit the compiler thread
1583   if (!init_compiler_runtime()) {
1584     return;
1585   }
1586 
1587   // Poll for new compilation tasks as long as the JVM runs. Compilation
1588   // should only be disabled if something went wrong while initializing the
1589   // compiler runtimes. This, in turn, should not happen. The only known case
1590   // when compiler runtime initialization fails is if there is not enough free
1591   // space in the code cache to generate the necessary stubs, etc.
1592   while (!is_compilation_disabled_forever()) {
1593     // We need this HandleMark to avoid leaking VM handles.
1594     HandleMark hm(thread);
1595 
1596     CompileTask* task = queue->get();
1597     if (task == NULL) {
1598       continue;
1599     }
1600 
1601     // Give compiler threads an extra quanta.  They tend to be bursty and
1602     // this helps the compiler to finish up the job.
1603     if (CompilerThreadHintNoPreempt) {
1604       os::hint_no_preempt();
1605     }
1606 
1607     // Assign the task to the current thread.  Mark this compilation
1608     // thread as active for the profiler.
1609     CompileTaskWrapper ctw(task);
1610     nmethodLocker result_handle;  // (handle for the nmethod produced by this task)
1611     task->set_code_handle(&result_handle);
1612     methodHandle method(thread, task->method());
1613 
1614     // Never compile a method if breakpoints are present in it
1615     if (method()->number_of_breakpoints() == 0) {
1616       // Compile the method.
1617       if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1618         invoke_compiler_on_method(task);
1619       } else {
1620         // After compilation is disabled, remove remaining methods from queue
1621         method->clear_queued_for_compilation();
1622         task->set_failure_reason("compilation is disabled");
1623       }
1624     }
1625   }
1626 
1627   // Shut down compiler runtime
1628   shutdown_compiler_runtime(thread->compiler(), thread);
1629 }
1630 
1631 // ------------------------------------------------------------------
1632 // CompileBroker::init_compiler_thread_log
1633 //
1634 // Set up state required by +LogCompilation.
1635 void CompileBroker::init_compiler_thread_log() {
1636     CompilerThread* thread = CompilerThread::current();
1637     char  file_name[4*K];
1638     FILE* fp = NULL;
1639     intx thread_id = os::current_thread_id();
1640     for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1641       const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1642       if (dir == NULL) {
1643         jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1644                      thread_id, os::current_process_id());
1645       } else {
1646         jio_snprintf(file_name, sizeof(file_name),
1647                      "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1648                      os::file_separator(), thread_id, os::current_process_id());
1649       }
1650 
1651       fp = fopen(file_name, "wt");
1652       if (fp != NULL) {
1653         if (LogCompilation && Verbose) {
1654           tty->print_cr("Opening compilation log %s", file_name);
1655         }
1656         CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1657         if (log == NULL) {
1658           fclose(fp);
1659           return;
1660         }
1661         thread->init_log(log);
1662 
1663         if (xtty != NULL) {
1664           ttyLocker ttyl;
1665           // Record any per thread log files
1666           xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1667         }
1668         return;
1669       }
1670     }
1671     warning("Cannot open log file: %s", file_name);
1672 }
1673 
1674 void CompileBroker::log_metaspace_failure() {
1675   const char* message = "some methods may not be compiled because metaspace "
1676                         "is out of memory";
1677   if (_compilation_log != NULL) {
1678     _compilation_log->log_metaspace_failure(message);
1679   }
1680   if (PrintCompilation) {
1681     tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1682   }
1683 }
1684 
1685 
1686 // ------------------------------------------------------------------
1687 // CompileBroker::set_should_block
1688 //
1689 // Set _should_block.
1690 // Call this from the VM, with Threads_lock held and a safepoint requested.
1691 void CompileBroker::set_should_block() {
1692   assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1693   assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1694 #ifndef PRODUCT
1695   if (PrintCompilation && (Verbose || WizardMode))
1696     tty->print_cr("notifying compiler thread pool to block");
1697 #endif
1698   _should_block = true;
1699 }
1700 
1701 // ------------------------------------------------------------------
1702 // CompileBroker::maybe_block
1703 //
1704 // Call this from the compiler at convenient points, to poll for _should_block.
1705 void CompileBroker::maybe_block() {
1706   if (_should_block) {
1707 #ifndef PRODUCT
1708     if (PrintCompilation && (Verbose || WizardMode))
1709       tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1710 #endif
1711     ThreadInVMfromNative tivfn(JavaThread::current());
1712   }
1713 }
1714 
1715 // wrapper for CodeCache::print_summary()
1716 static void codecache_print(bool detailed)
1717 {
1718   ResourceMark rm;
1719   stringStream s;
1720   // Dump code cache  into a buffer before locking the tty,
1721   {
1722     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1723     CodeCache::print_summary(&s, detailed);
1724   }
1725   ttyLocker ttyl;
1726   tty->print("%s", s.as_string());
1727 }
1728 
1729 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1730 
1731   if (success) {
1732     task->mark_success();
1733     if (ci_env != NULL) {
1734       task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1735     }
1736     if (_compilation_log != NULL) {
1737       nmethod* code = task->code();
1738       if (code != NULL) {
1739         _compilation_log->log_nmethod(thread, code);
1740       }
1741     }
1742   }
1743 
1744   // simulate crash during compilation
1745   assert(task->compile_id() != CICrashAt, "just as planned");
1746   if (event.should_commit()) {
1747     event.set_method(task->method());
1748     event.set_compileID(task->compile_id());
1749     event.set_compileLevel(task->comp_level());
1750     event.set_succeded(task->is_success());
1751     event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1752     event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1753     event.set_inlinedBytes(task->num_inlined_bytecodes());
1754     event.commit();
1755   }
1756 }
1757 
1758 int DirectivesStack::_depth = 0;
1759 CompilerDirectives* DirectivesStack::_top = NULL;
1760 CompilerDirectives* DirectivesStack::_bottom = NULL;
1761 
1762 // ------------------------------------------------------------------
1763 // CompileBroker::invoke_compiler_on_method
1764 //
1765 // Compile a method.
1766 //
1767 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1768   if (PrintCompilation) {
1769     ResourceMark rm;
1770     task->print_tty();
1771   }
1772   elapsedTimer time;
1773 
1774   CompilerThread* thread = CompilerThread::current();
1775   ResourceMark rm(thread);
1776 
1777   if (LogEvents) {
1778     _compilation_log->log_compile(thread, task);
1779   }
1780 
1781   // Common flags.
1782   uint compile_id = task->compile_id();
1783   int osr_bci = task->osr_bci();
1784   bool is_osr = (osr_bci != standard_entry_bci);
1785   bool should_log = (thread->log() != NULL);
1786   bool should_break = false;
1787   const int task_level = task->comp_level();
1788   AbstractCompiler* comp = task->compiler();
1789 
1790   DirectiveSet* directive;
1791   {
1792     // create the handle inside it's own block so it can't
1793     // accidentally be referenced once the thread transitions to
1794     // native.  The NoHandleMark before the transition should catch
1795     // any cases where this occurs in the future.
1796     methodHandle method(thread, task->method());
1797     assert(!method->is_native(), "no longer compile natives");
1798 
1799     // Look up matching directives
1800     directive = DirectivesStack::getMatchingDirective(method, comp);
1801 
1802     // Save information about this method in case of failure.
1803     set_last_compile(thread, method, is_osr, task_level);
1804 
1805     DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1806   }
1807 
1808   should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1809   if (should_log && !directive->LogOption) {
1810     should_log = false;
1811   }
1812 
1813   // Allocate a new set of JNI handles.
1814   push_jni_handle_block();
1815   Method* target_handle = task->method();
1816   int compilable = ciEnv::MethodCompilable;
1817   const char* failure_reason = NULL;
1818   const char* retry_message = NULL;
1819 
1820   int system_dictionary_modification_counter;
1821   {
1822     MutexLocker locker(Compile_lock, thread);
1823     system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1824   }
1825 
1826 #if INCLUDE_JVMCI
1827   if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1828     JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1829 
1830     TraceTime t1("compilation", &time);
1831     EventCompilation event;
1832 
1833     JVMCIEnv env(task, system_dictionary_modification_counter);
1834     methodHandle method(thread, target_handle);
1835     jvmci->compile_method(method, osr_bci, &env);
1836 
1837     post_compile(thread, task, event, task->code() != NULL, NULL);
1838 
1839     failure_reason = env.failure_reason();
1840     if (!env.retryable()) {
1841       retry_message = "not retryable";
1842       compilable = ciEnv::MethodCompilable_not_at_tier;
1843     }
1844 
1845   } else
1846 #endif // INCLUDE_JVMCI
1847   {
1848     NoHandleMark  nhm;
1849     ThreadToNativeFromVM ttn(thread);
1850 
1851     ciEnv ci_env(task, system_dictionary_modification_counter);
1852     if (should_break) {
1853       ci_env.set_break_at_compile(true);
1854     }
1855     if (should_log) {
1856       ci_env.set_log(thread->log());
1857     }
1858     assert(thread->env() == &ci_env, "set by ci_env");
1859     // The thread-env() field is cleared in ~CompileTaskWrapper.
1860 
1861     // Cache Jvmti state
1862     ci_env.cache_jvmti_state();
1863 
1864     // Cache DTrace flags
1865     ci_env.cache_dtrace_flags();
1866 
1867     ciMethod* target = ci_env.get_method_from_handle(target_handle);
1868 
1869     TraceTime t1("compilation", &time);
1870     EventCompilation event;
1871 
1872     if (comp == NULL) {
1873       ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1874     } else {
1875       if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1876         MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1877         while (WhiteBox::compilation_locked) {
1878           locker.wait(Mutex::_no_safepoint_check_flag);
1879         }
1880       }
1881       comp->compile_method(&ci_env, target, osr_bci, directive);
1882     }
1883 
1884     if (!ci_env.failing() && task->code() == NULL) {
1885       //assert(false, "compiler should always document failure");
1886       // The compiler elected, without comment, not to register a result.
1887       // Do not attempt further compilations of this method.
1888       ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1889     }
1890 
1891     // Copy this bit to the enclosing block:
1892     compilable = ci_env.compilable();
1893 
1894     if (ci_env.failing()) {
1895       failure_reason = ci_env.failure_reason();
1896       retry_message = ci_env.retry_message();
1897       ci_env.report_failure(failure_reason);
1898     }
1899 
1900     post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1901   }
1902   // Remove the JNI handle block after the ciEnv destructor has run in
1903   // the previous block.
1904   pop_jni_handle_block();
1905 
1906   if (failure_reason != NULL) {
1907     task->set_failure_reason(failure_reason);
1908     if (_compilation_log != NULL) {
1909       _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1910     }
1911     if (PrintCompilation) {
1912       FormatBufferResource msg = retry_message != NULL ?
1913         FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1914         FormatBufferResource("COMPILE SKIPPED: %s",      failure_reason);
1915       task->print(tty, msg);
1916     }
1917   }
1918 
1919   methodHandle method(thread, task->method());
1920 
1921   DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1922 
1923   collect_statistics(thread, time, task);
1924 
1925   nmethod* nm = task->code();
1926   if (nm != NULL) {
1927     nm->maybe_print_nmethod(directive);
1928   }
1929   DirectivesStack::release(directive);
1930 
1931   if (PrintCompilation && PrintCompilation2) {
1932     tty->print("%7d ", (int) tty->time_stamp().milliseconds());  // print timestamp
1933     tty->print("%4d ", compile_id);    // print compilation number
1934     tty->print("%s ", (is_osr ? "%" : " "));
1935     if (task->code() != NULL) {
1936       tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1937     }
1938     tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1939   }
1940 
1941   if (PrintCodeCacheOnCompilation)
1942     codecache_print(/* detailed= */ false);
1943 
1944   // Disable compilation, if required.
1945   switch (compilable) {
1946   case ciEnv::MethodCompilable_never:
1947     if (is_osr)
1948       method->set_not_osr_compilable_quietly();
1949     else
1950       method->set_not_compilable_quietly();
1951     break;
1952   case ciEnv::MethodCompilable_not_at_tier:
1953     if (is_osr)
1954       method->set_not_osr_compilable_quietly(task_level);
1955     else
1956       method->set_not_compilable_quietly(task_level);
1957     break;
1958   }
1959 
1960   // Note that the queued_for_compilation bits are cleared without
1961   // protection of a mutex. [They were set by the requester thread,
1962   // when adding the task to the compile queue -- at which time the
1963   // compile queue lock was held. Subsequently, we acquired the compile
1964   // queue lock to get this task off the compile queue; thus (to belabour
1965   // the point somewhat) our clearing of the bits must be occurring
1966   // only after the setting of the bits. See also 14012000 above.
1967   method->clear_queued_for_compilation();
1968 
1969 #ifdef ASSERT
1970   if (CollectedHeap::fired_fake_oom()) {
1971     // The current compile received a fake OOM during compilation so
1972     // go ahead and exit the VM since the test apparently succeeded
1973     tty->print_cr("*** Shutting down VM after successful fake OOM");
1974     vm_exit(0);
1975   }
1976 #endif
1977 }
1978 
1979 /**
1980  * The CodeCache is full. Print warning and disable compilation.
1981  * Schedule code cache cleaning so compilation can continue later.
1982  * This function needs to be called only from CodeCache::allocate(),
1983  * since we currently handle a full code cache uniformly.
1984  */
1985 void CompileBroker::handle_full_code_cache(int code_blob_type) {
1986   UseInterpreter = true;
1987   if (UseCompiler || AlwaysCompileLoopMethods ) {
1988     if (xtty != NULL) {
1989       ResourceMark rm;
1990       stringStream s;
1991       // Dump code cache state into a buffer before locking the tty,
1992       // because log_state() will use locks causing lock conflicts.
1993       CodeCache::log_state(&s);
1994       // Lock to prevent tearing
1995       ttyLocker ttyl;
1996       xtty->begin_elem("code_cache_full");
1997       xtty->print("%s", s.as_string());
1998       xtty->stamp();
1999       xtty->end_elem();
2000     }
2001 
2002 #ifndef PRODUCT
2003     if (CompileTheWorld || ExitOnFullCodeCache) {
2004       codecache_print(/* detailed= */ true);
2005       before_exit(JavaThread::current());
2006       exit_globals(); // will delete tty
2007       vm_direct_exit(CompileTheWorld ? 0 : 1);
2008     }
2009 #endif
2010     if (UseCodeCacheFlushing) {
2011       // Since code cache is full, immediately stop new compiles
2012       if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2013         NMethodSweeper::log_sweep("disable_compiler");
2014       }
2015     } else {
2016       disable_compilation_forever();
2017     }
2018 
2019     CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2020   }
2021 }
2022 
2023 // ------------------------------------------------------------------
2024 // CompileBroker::set_last_compile
2025 //
2026 // Record this compilation for debugging purposes.
2027 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2028   ResourceMark rm;
2029   char* method_name = method->name()->as_C_string();
2030   strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2031   _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2032   char current_method[CompilerCounters::cmname_buffer_length];
2033   size_t maxLen = CompilerCounters::cmname_buffer_length;
2034 
2035   if (UsePerfData) {
2036     const char* class_name = method->method_holder()->name()->as_C_string();
2037 
2038     size_t s1len = strlen(class_name);
2039     size_t s2len = strlen(method_name);
2040 
2041     // check if we need to truncate the string
2042     if (s1len + s2len + 2 > maxLen) {
2043 
2044       // the strategy is to lop off the leading characters of the
2045       // class name and the trailing characters of the method name.
2046 
2047       if (s2len + 2 > maxLen) {
2048         // lop of the entire class name string, let snprintf handle
2049         // truncation of the method name.
2050         class_name += s1len; // null string
2051       }
2052       else {
2053         // lop off the extra characters from the front of the class name
2054         class_name += ((s1len + s2len + 2) - maxLen);
2055       }
2056     }
2057 
2058     jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2059   }
2060 
2061   if (CICountOSR && is_osr) {
2062     _last_compile_type = osr_compile;
2063   } else {
2064     _last_compile_type = normal_compile;
2065   }
2066   _last_compile_level = comp_level;
2067 
2068   if (UsePerfData) {
2069     CompilerCounters* counters = thread->counters();
2070     counters->set_current_method(current_method);
2071     counters->set_compile_type((jlong)_last_compile_type);
2072   }
2073 }
2074 
2075 
2076 // ------------------------------------------------------------------
2077 // CompileBroker::push_jni_handle_block
2078 //
2079 // Push on a new block of JNI handles.
2080 void CompileBroker::push_jni_handle_block() {
2081   JavaThread* thread = JavaThread::current();
2082 
2083   // Allocate a new block for JNI handles.
2084   // Inlined code from jni_PushLocalFrame()
2085   JNIHandleBlock* java_handles = thread->active_handles();
2086   JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2087   assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2088   compile_handles->set_pop_frame_link(java_handles);  // make sure java handles get gc'd.
2089   thread->set_active_handles(compile_handles);
2090 }
2091 
2092 
2093 // ------------------------------------------------------------------
2094 // CompileBroker::pop_jni_handle_block
2095 //
2096 // Pop off the current block of JNI handles.
2097 void CompileBroker::pop_jni_handle_block() {
2098   JavaThread* thread = JavaThread::current();
2099 
2100   // Release our JNI handle block
2101   JNIHandleBlock* compile_handles = thread->active_handles();
2102   JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2103   thread->set_active_handles(java_handles);
2104   compile_handles->set_pop_frame_link(NULL);
2105   JNIHandleBlock::release_block(compile_handles, thread); // may block
2106 }
2107 
2108 // ------------------------------------------------------------------
2109 // CompileBroker::collect_statistics
2110 //
2111 // Collect statistics about the compilation.
2112 
2113 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2114   bool success = task->is_success();
2115   methodHandle method (thread, task->method());
2116   uint compile_id = task->compile_id();
2117   bool is_osr = (task->osr_bci() != standard_entry_bci);
2118   nmethod* code = task->code();
2119   CompilerCounters* counters = thread->counters();
2120 
2121   assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2122   MutexLocker locker(CompileStatistics_lock);
2123 
2124   // _perf variables are production performance counters which are
2125   // updated regardless of the setting of the CITime and CITimeEach flags
2126   //
2127 
2128   // account all time, including bailouts and failures in this counter;
2129   // C1 and C2 counters are counting both successful and unsuccessful compiles
2130   _t_total_compilation.add(time);
2131 
2132   if (!success) {
2133     _total_bailout_count++;
2134     if (UsePerfData) {
2135       _perf_last_failed_method->set_value(counters->current_method());
2136       _perf_last_failed_type->set_value(counters->compile_type());
2137       _perf_total_bailout_count->inc();
2138     }
2139     _t_bailedout_compilation.add(time);
2140   } else if (code == NULL) {
2141     if (UsePerfData) {
2142       _perf_last_invalidated_method->set_value(counters->current_method());
2143       _perf_last_invalidated_type->set_value(counters->compile_type());
2144       _perf_total_invalidated_count->inc();
2145     }
2146     _total_invalidated_count++;
2147     _t_invalidated_compilation.add(time);
2148   } else {
2149     // Compilation succeeded
2150 
2151     // update compilation ticks - used by the implementation of
2152     // java.lang.management.CompilationMBean
2153     _perf_total_compilation->inc(time.ticks());
2154     _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2155 
2156     if (CITime) {
2157       int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2158       if (is_osr) {
2159         _t_osr_compilation.add(time);
2160         _sum_osr_bytes_compiled += bytes_compiled;
2161       } else {
2162         _t_standard_compilation.add(time);
2163         _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2164       }
2165 
2166 #if INCLUDE_JVMCI
2167       AbstractCompiler* comp = compiler(task->comp_level());
2168       if (comp) {
2169         CompilerStatistics* stats = comp->stats();
2170         if (stats) {
2171           if (is_osr) {
2172             stats->_osr.update(time, bytes_compiled);
2173           } else {
2174             stats->_standard.update(time, bytes_compiled);
2175           }
2176           stats->_nmethods_size += code->total_size();
2177           stats->_nmethods_code_size += code->insts_size();
2178         } else { // if (!stats)
2179           assert(false, "Compiler statistics object must exist");
2180         }
2181       } else { // if (!comp)
2182         assert(false, "Compiler object must exist");
2183       }
2184 #endif // INCLUDE_JVMCI
2185     }
2186 
2187     if (UsePerfData) {
2188       // save the name of the last method compiled
2189       _perf_last_method->set_value(counters->current_method());
2190       _perf_last_compile_type->set_value(counters->compile_type());
2191       _perf_last_compile_size->set_value(method->code_size() +
2192                                          task->num_inlined_bytecodes());
2193       if (is_osr) {
2194         _perf_osr_compilation->inc(time.ticks());
2195         _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2196       } else {
2197         _perf_standard_compilation->inc(time.ticks());
2198         _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2199       }
2200     }
2201 
2202     if (CITimeEach) {
2203       float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2204       tty->print_cr("%3d   seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2205                     compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2206     }
2207 
2208     // Collect counts of successful compilations
2209     _sum_nmethod_size      += code->total_size();
2210     _sum_nmethod_code_size += code->insts_size();
2211     _total_compile_count++;
2212 
2213     if (UsePerfData) {
2214       _perf_sum_nmethod_size->inc(     code->total_size());
2215       _perf_sum_nmethod_code_size->inc(code->insts_size());
2216       _perf_total_compile_count->inc();
2217     }
2218 
2219     if (is_osr) {
2220       if (UsePerfData) _perf_total_osr_compile_count->inc();
2221       _total_osr_compile_count++;
2222     } else {
2223       if (UsePerfData) _perf_total_standard_compile_count->inc();
2224       _total_standard_compile_count++;
2225     }
2226   }
2227   // set the current method for the thread to null
2228   if (UsePerfData) counters->set_current_method("");
2229 }
2230 
2231 const char* CompileBroker::compiler_name(int comp_level) {
2232   AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2233   if (comp == NULL) {
2234     return "no compiler";
2235   } else {
2236     return (comp->name());
2237   }
2238 }
2239 
2240 #if INCLUDE_JVMCI
2241 void CompileBroker::print_times(AbstractCompiler* comp) {
2242   CompilerStatistics* stats = comp->stats();
2243   if (stats) {
2244     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}",
2245                 comp->name(), stats->bytes_per_second(),
2246                 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2247                 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2248                 stats->_nmethods_size, stats->_nmethods_code_size);
2249   } else { // if (!stats)
2250     assert(false, "Compiler statistics object must exist");
2251   }
2252   comp->print_timers();
2253 }
2254 #endif // INCLUDE_JVMCI
2255 
2256 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2257 #if INCLUDE_JVMCI
2258   elapsedTimer standard_compilation;
2259   elapsedTimer total_compilation;
2260   elapsedTimer osr_compilation;
2261 
2262   int standard_bytes_compiled = 0;
2263   int osr_bytes_compiled = 0;
2264 
2265   int standard_compile_count = 0;
2266   int osr_compile_count = 0;
2267   int total_compile_count = 0;
2268 
2269   int nmethods_size = 0;
2270   int nmethods_code_size = 0;
2271   bool printedHeader = false;
2272 
2273   for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2274     AbstractCompiler* comp = _compilers[i];
2275     if (comp != NULL) {
2276       if (per_compiler && aggregate && !printedHeader) {
2277         printedHeader = true;
2278         tty->cr();
2279         tty->print_cr("Individual compiler times (for compiled methods only)");
2280         tty->print_cr("------------------------------------------------");
2281         tty->cr();
2282       }
2283       CompilerStatistics* stats = comp->stats();
2284 
2285       if (stats) {
2286         standard_compilation.add(stats->_standard._time);
2287         osr_compilation.add(stats->_osr._time);
2288 
2289         standard_bytes_compiled += stats->_standard._bytes;
2290         osr_bytes_compiled += stats->_osr._bytes;
2291 
2292         standard_compile_count += stats->_standard._count;
2293         osr_compile_count += stats->_osr._count;
2294 
2295         nmethods_size += stats->_nmethods_size;
2296         nmethods_code_size += stats->_nmethods_code_size;
2297       } else { // if (!stats)
2298         assert(false, "Compiler statistics object must exist");
2299       }
2300 
2301       if (per_compiler) {
2302         print_times(comp);
2303       }
2304     }
2305   }
2306   total_compile_count = osr_compile_count + standard_compile_count;
2307   total_compilation.add(osr_compilation);
2308   total_compilation.add(standard_compilation);
2309 
2310   // In hosted mode, print the JVMCI compiler specific counters manually.
2311   if (!UseJVMCICompiler) {
2312     JVMCICompiler::print_compilation_timers();
2313   }
2314 #else // INCLUDE_JVMCI
2315   elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2316   elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2317   elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2318 
2319   int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2320   int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2321 
2322   int standard_compile_count = CompileBroker::_total_standard_compile_count;
2323   int osr_compile_count = CompileBroker::_total_osr_compile_count;
2324   int total_compile_count = CompileBroker::_total_compile_count;
2325 
2326   int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2327   int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2328 #endif // INCLUDE_JVMCI
2329 
2330   if (!aggregate) {
2331     return;
2332   }
2333   tty->cr();
2334   tty->print_cr("Accumulated compiler times");
2335   tty->print_cr("----------------------------------------------------------");
2336                //0000000000111111111122222222223333333333444444444455555555556666666666
2337                //0123456789012345678901234567890123456789012345678901234567890123456789
2338   tty->print_cr("  Total compilation time   : %7.3f s", total_compilation.seconds());
2339   tty->print_cr("    Standard compilation   : %7.3f s, Average : %2.3f s",
2340                 standard_compilation.seconds(),
2341                 standard_compilation.seconds() / standard_compile_count);
2342   tty->print_cr("    Bailed out compilation : %7.3f s, Average : %2.3f s",
2343                 CompileBroker::_t_bailedout_compilation.seconds(),
2344                 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2345   tty->print_cr("    On stack replacement   : %7.3f s, Average : %2.3f s",
2346                 osr_compilation.seconds(),
2347                 osr_compilation.seconds() / osr_compile_count);
2348   tty->print_cr("    Invalidated            : %7.3f s, Average : %2.3f s",
2349                 CompileBroker::_t_invalidated_compilation.seconds(),
2350                 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2351 
2352   AbstractCompiler *comp = compiler(CompLevel_simple);
2353   if (comp != NULL) {
2354     tty->cr();
2355     comp->print_timers();
2356   }
2357   comp = compiler(CompLevel_full_optimization);
2358   if (comp != NULL) {
2359     tty->cr();
2360     comp->print_timers();
2361   }
2362   tty->cr();
2363   tty->print_cr("  Total compiled methods    : %8d methods", total_compile_count);
2364   tty->print_cr("    Standard compilation    : %8d methods", standard_compile_count);
2365   tty->print_cr("    On stack replacement    : %8d methods", osr_compile_count);
2366   int tcb = osr_bytes_compiled + standard_bytes_compiled;
2367   tty->print_cr("  Total compiled bytecodes  : %8d bytes", tcb);
2368   tty->print_cr("    Standard compilation    : %8d bytes", standard_bytes_compiled);
2369   tty->print_cr("    On stack replacement    : %8d bytes", osr_bytes_compiled);
2370   double tcs = total_compilation.seconds();
2371   int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2372   tty->print_cr("  Average compilation speed : %8d bytes/s", bps);
2373   tty->cr();
2374   tty->print_cr("  nmethod code size         : %8d bytes", nmethods_code_size);
2375   tty->print_cr("  nmethod total size        : %8d bytes", nmethods_size);
2376 }
2377 
2378 // Debugging output for failure
2379 void CompileBroker::print_last_compile() {
2380   if (_last_compile_level != CompLevel_none &&
2381       compiler(_last_compile_level) != NULL &&
2382       _last_compile_type != no_compile) {
2383     if (_last_compile_type == osr_compile) {
2384       tty->print_cr("Last parse:  [osr]%d+++(%d) %s",
2385                     _osr_compilation_id, _last_compile_level, _last_method_compiled);
2386     } else {
2387       tty->print_cr("Last parse:  %d+++(%d) %s",
2388                     _compilation_id, _last_compile_level, _last_method_compiled);
2389     }
2390   }
2391 }
2392