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