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src/hotspot/share/runtime/threads.cpp

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   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"

  27 #include "cds/cds_globals.hpp"
  28 #include "cds/cdsConfig.hpp"


  29 #include "cds/metaspaceShared.hpp"

  30 #include "classfile/classLoader.hpp"
  31 #include "classfile/javaClasses.hpp"
  32 #include "classfile/javaThreadStatus.hpp"
  33 #include "classfile/systemDictionary.hpp"

  34 #include "classfile/vmClasses.hpp"
  35 #include "classfile/vmSymbols.hpp"


  36 #include "compiler/compileBroker.hpp"
  37 #include "compiler/compileTask.hpp"
  38 #include "compiler/compilerThread.hpp"

  39 #include "gc/shared/barrierSet.hpp"
  40 #include "gc/shared/barrierSetNMethod.hpp"
  41 #include "gc/shared/gcVMOperations.hpp"
  42 #include "gc/shared/oopStorage.hpp"
  43 #include "gc/shared/oopStorageSet.hpp"
  44 #include "gc/shared/stringdedup/stringDedup.hpp"

  45 #include "jfr/jfrEvents.hpp"
  46 #include "jvm.h"
  47 #include "jvmtifiles/jvmtiEnv.hpp"
  48 #include "logging/log.hpp"
  49 #include "logging/logAsyncWriter.hpp"
  50 #include "logging/logConfiguration.hpp"
  51 #include "memory/allocation.inline.hpp"
  52 #include "memory/iterator.hpp"
  53 #include "memory/oopFactory.hpp"
  54 #include "memory/resourceArea.hpp"
  55 #include "memory/universe.hpp"
  56 #include "nmt/memTracker.hpp"
  57 #include "oops/instanceKlass.hpp"
  58 #include "oops/klass.inline.hpp"
  59 #include "oops/oop.inline.hpp"

  60 #include "oops/symbol.hpp"
  61 #include "prims/jvm_misc.hpp"
  62 #include "prims/jvmtiAgentList.hpp"
  63 #include "prims/jvmtiEnvBase.hpp"
  64 #include "runtime/arguments.hpp"
  65 #include "runtime/fieldDescriptor.inline.hpp"
  66 #include "runtime/flags/jvmFlagLimit.hpp"
  67 #include "runtime/globals.hpp"
  68 #include "runtime/handles.inline.hpp"
  69 #include "runtime/interfaceSupport.inline.hpp"
  70 #include "runtime/java.hpp"
  71 #include "runtime/javaCalls.hpp"
  72 #include "runtime/javaThread.inline.hpp"
  73 #include "runtime/jniHandles.inline.hpp"
  74 #include "runtime/jniPeriodicChecker.hpp"
  75 #include "runtime/lockStack.inline.hpp"
  76 #include "runtime/monitorDeflationThread.hpp"
  77 #include "runtime/mutexLocker.hpp"
  78 #include "runtime/nonJavaThread.hpp"
  79 #include "runtime/objectMonitor.inline.hpp"

 300 //     enable the startup code to use lambda and other language features in this
 301 //     phase and onward.
 302 //
 303 //     After phase 2, The VM will begin search classes from -Xbootclasspath/a.
 304 static void call_initPhase2(TRAPS) {
 305   TraceTime timer("Initialize module system", TRACETIME_LOG(Info, startuptime));
 306 
 307   Klass* klass = vmClasses::System_klass();
 308 
 309   JavaValue result(T_INT);
 310   JavaCallArguments args;
 311   args.push_int(DisplayVMOutputToStderr);
 312   args.push_int(log_is_enabled(Debug, init)); // print stack trace if exception thrown
 313   JavaCalls::call_static(&result, klass, vmSymbols::initPhase2_name(),
 314                                          vmSymbols::boolean_boolean_int_signature(), &args, CHECK);
 315   if (result.get_jint() != JNI_OK) {
 316     vm_exit_during_initialization(); // no message or exception
 317   }
 318 
 319   universe_post_module_init();











 320 }
 321 
 322 // Phase 3. final setup - set security manager, system class loader and TCCL
 323 //
 324 //     This will instantiate and set the security manager, set the system class
 325 //     loader as well as the thread context class loader.  The security manager
 326 //     and system class loader may be a custom class loaded from -Xbootclasspath/a,
 327 //     other modules or the application's classpath.
 328 static void call_initPhase3(TRAPS) {
 329   Klass* klass = vmClasses::System_klass();
 330   JavaValue result(T_VOID);
 331   JavaCalls::call_static(&result, klass, vmSymbols::initPhase3_name(),
 332                                          vmSymbols::void_method_signature(), CHECK);
 333 }
 334 
 335 void Threads::initialize_java_lang_classes(JavaThread* main_thread, TRAPS) {
 336   TraceTime timer("Initialize java.lang classes", TRACETIME_LOG(Info, startuptime));
 337 
 338   initialize_class(vmSymbols::java_lang_String(), CHECK);
 339 
 340   // Inject CompactStrings value after the static initializers for String ran.
 341   java_lang_String::set_compact_strings(CompactStrings);
 342 
 343   // Initialize java_lang.System (needed before creating the thread)
 344   initialize_class(vmSymbols::java_lang_System(), CHECK);
 345   // The VM creates & returns objects of this class. Make sure it's initialized.
 346   initialize_class(vmSymbols::java_lang_Class(), CHECK);
 347   initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK);
 348   Handle thread_group = create_initial_thread_group(CHECK);
 349   Universe::set_main_thread_group(thread_group());
 350   initialize_class(vmSymbols::java_lang_Thread(), CHECK);
 351   create_initial_thread(thread_group, main_thread, CHECK);
 352 


 353   // The VM creates objects of this class.
 354   initialize_class(vmSymbols::java_lang_Module(), CHECK);
 355 
 356 #ifdef ASSERT
 357   InstanceKlass *k = vmClasses::UnsafeConstants_klass();
 358   assert(k->is_not_initialized(), "UnsafeConstants should not already be initialized");
 359 #endif
 360 
 361   // initialize the hardware-specific constants needed by Unsafe
 362   initialize_class(vmSymbols::jdk_internal_misc_UnsafeConstants(), CHECK);
 363   jdk_internal_misc_UnsafeConstants::set_unsafe_constants();
 364 
 365   // The VM preresolves methods to these classes. Make sure that they get initialized
 366   initialize_class(vmSymbols::java_lang_reflect_Method(), CHECK);
 367   initialize_class(vmSymbols::java_lang_ref_Finalizer(), CHECK);
 368 
 369   // Phase 1 of the system initialization in the library, java.lang.System class initialization
 370   call_initPhase1(CHECK);
 371 
 372   // Get the Java runtime name, version, and vendor info after java.lang.System is initialized.

 381     JDK_Version::set_runtime_name(get_java_version_info(ik, vmSymbols::java_runtime_name_name()));
 382 
 383     JDK_Version::set_runtime_version(get_java_version_info(ik, vmSymbols::java_runtime_version_name()));
 384 
 385     JDK_Version::set_runtime_vendor_version(get_java_version_info(ik, vmSymbols::java_runtime_vendor_version_name()));
 386 
 387     JDK_Version::set_runtime_vendor_vm_bug_url(get_java_version_info(ik, vmSymbols::java_runtime_vendor_vm_bug_url_name()));
 388   }
 389 
 390   // an instance of OutOfMemory exception has been allocated earlier
 391   initialize_class(vmSymbols::java_lang_OutOfMemoryError(), CHECK);
 392   initialize_class(vmSymbols::java_lang_NullPointerException(), CHECK);
 393   initialize_class(vmSymbols::java_lang_ClassCastException(), CHECK);
 394   initialize_class(vmSymbols::java_lang_ArrayStoreException(), CHECK);
 395   initialize_class(vmSymbols::java_lang_ArithmeticException(), CHECK);
 396   initialize_class(vmSymbols::java_lang_StackOverflowError(), CHECK);
 397   initialize_class(vmSymbols::java_lang_IllegalMonitorStateException(), CHECK);
 398   initialize_class(vmSymbols::java_lang_IllegalArgumentException(), CHECK);
 399 }
 400 
































 401 void Threads::initialize_jsr292_core_classes(TRAPS) {
 402   TraceTime timer("Initialize java.lang.invoke classes", TRACETIME_LOG(Info, startuptime));
 403 
 404   initialize_class(vmSymbols::java_lang_invoke_MethodHandle(), CHECK);
 405   initialize_class(vmSymbols::java_lang_invoke_ResolvedMethodName(), CHECK);
 406   initialize_class(vmSymbols::java_lang_invoke_MemberName(), CHECK);
 407   initialize_class(vmSymbols::java_lang_invoke_MethodHandleNatives(), CHECK);




 408 }
 409 
 410 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) {
 411   extern void JDK_Version_init();
 412 
 413   // Preinitialize version info.
 414   VM_Version::early_initialize();
 415 
 416   // Check version
 417   if (!is_supported_jni_version(args->version)) return JNI_EVERSION;
 418 
 419   // Initialize library-based TLS
 420   ThreadLocalStorage::init();
 421 
 422   // Initialize the output stream module
 423   ostream_init();
 424 
 425   // Process java launcher properties.
 426   Arguments::process_sun_java_launcher_properties(args);
 427 

 513     JavaThread::_jvmci_old_thread_counters = NEW_C_HEAP_ARRAY(jlong, JVMCICounterSize, mtJVMCI);
 514     memset(JavaThread::_jvmci_old_thread_counters, 0, sizeof(jlong) * JVMCICounterSize);
 515   } else {
 516     JavaThread::_jvmci_old_thread_counters = nullptr;
 517   }
 518 #endif // INCLUDE_JVMCI
 519 
 520   // Initialize OopStorage for threadObj
 521   JavaThread::_thread_oop_storage = OopStorageSet::create_strong("Thread OopStorage", mtThread);
 522 
 523   // Attach the main thread to this os thread
 524   JavaThread* main_thread = new JavaThread();
 525   main_thread->set_thread_state(_thread_in_vm);
 526   main_thread->initialize_thread_current();
 527   // must do this before set_active_handles
 528   main_thread->record_stack_base_and_size();
 529   main_thread->register_thread_stack_with_NMT();
 530   main_thread->set_active_handles(JNIHandleBlock::allocate_block());
 531   MACOS_AARCH64_ONLY(main_thread->init_wx());
 532 


 533   if (!main_thread->set_as_starting_thread()) {
 534     vm_shutdown_during_initialization(
 535                                       "Failed necessary internal allocation. Out of swap space");
 536     main_thread->smr_delete();
 537     *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again
 538     return JNI_ENOMEM;
 539   }
 540 
 541   // Enable guard page *after* os::create_main_thread(), otherwise it would
 542   // crash Linux VM, see notes in os_linux.cpp.
 543   main_thread->stack_overflow_state()->create_stack_guard_pages();
 544 
 545   // Initialize Java-Level synchronization subsystem
 546   ObjectMonitor::Initialize();
 547   ObjectSynchronizer::initialize();
 548 



 549   // Initialize global modules
 550   jint status = init_globals();
 551   if (status != JNI_OK) {
 552     main_thread->smr_delete();
 553     *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again
 554     return status;
 555   }



 556 
 557   // Create WatcherThread as soon as we can since we need it in case
 558   // of hangs during error reporting.
 559   WatcherThread::start();
 560 
 561   // Add main_thread to threads list to finish barrier setup with
 562   // on_thread_attach.  Should be before starting to build Java objects in
 563   // init_globals2, which invokes barriers.
 564   {
 565     MutexLocker mu(Threads_lock);
 566     Threads::add(main_thread);
 567   }
 568 
 569   status = init_globals2();
 570   if (status != JNI_OK) {
 571     Threads::remove(main_thread, false);
 572     // It is possible that we managed to fully initialize Universe but have then
 573     // failed by throwing an exception. In that case our caller JNI_CreateJavaVM
 574     // will want to report it, so we can't delete the main thread.
 575     if (!main_thread->has_pending_exception()) {

 673     if (StartAttachListener || AttachListener::init_at_startup()) {
 674       AttachListener::init();
 675     }
 676   }
 677 
 678   // Launch -Xrun agents if EagerXrunInit is not set.
 679   if (!EagerXrunInit) {
 680     JvmtiAgentList::load_xrun_agents();
 681   }
 682 
 683   Arena::start_chunk_pool_cleaner_task();
 684 
 685   // Start the service thread
 686   // The service thread enqueues JVMTI deferred events and does various hashtable
 687   // and other cleanups.  Needs to start before the compilers start posting events.
 688   ServiceThread::initialize();
 689 
 690   // Start the monitor deflation thread:
 691   MonitorDeflationThread::initialize();
 692 
 693   // initialize compiler(s)
 694 #if defined(COMPILER1) || COMPILER2_OR_JVMCI
 695   bool init_compilation = true;
 696 #if INCLUDE_JVMCI
 697   bool force_JVMCI_initialization = false;
 698   if (EnableJVMCI) {
 699     // Initialize JVMCI eagerly when it is explicitly requested.
 700     // Or when JVMCILibDumpJNIConfig or JVMCIPrintProperties is enabled.
 701     force_JVMCI_initialization = EagerJVMCI || JVMCIPrintProperties || JVMCILibDumpJNIConfig;
 702     if (!force_JVMCI_initialization && UseJVMCICompiler && !UseJVMCINativeLibrary && (!UseInterpreter || !BackgroundCompilation)) {
 703       // Force initialization of jarjvmci otherwise requests for blocking
 704       // compilations will not actually block until jarjvmci is initialized.
 705       force_JVMCI_initialization = true;
 706     }
 707     if (JVMCIPrintProperties || JVMCILibDumpJNIConfig) {
 708       // Both JVMCILibDumpJNIConfig and JVMCIPrintProperties exit the VM
 709       // so compilation should be disabled. This prevents dumping or
 710       // printing from happening more than once.
 711       init_compilation = false;
 712     }
 713   }
 714 #endif
 715   if (init_compilation) {
 716     CompileBroker::compilation_init(CHECK_JNI_ERR);
 717   }
 718 #endif
 719 
 720   // Start string deduplication thread if requested.
 721   if (StringDedup::is_enabled()) {
 722     StringDedup::start();
 723   }
 724 
 725   // Pre-initialize some JSR292 core classes to avoid deadlock during class loading.
 726   // It is done after compilers are initialized, because otherwise compilations of
 727   // signature polymorphic MH intrinsics can be missed
 728   // (see SystemDictionary::find_method_handle_intrinsic).
 729   initialize_jsr292_core_classes(CHECK_JNI_ERR);
 730 
 731   // This will initialize the module system.  Only java.base classes can be
 732   // loaded until phase 2 completes
 733   call_initPhase2(CHECK_JNI_ERR);
 734 
 735   JFR_ONLY(Jfr::on_create_vm_2();)
 736 
 737   // Always call even when there are not JVMTI environments yet, since environments
 738   // may be attached late and JVMTI must track phases of VM execution
 739   JvmtiExport::enter_start_phase();
 740 
 741   // Notify JVMTI agents that VM has started (JNI is up) - nop if no agents.
 742   JvmtiExport::post_vm_start();
 743 
 744   // Final system initialization including security manager and system class loader
 745   call_initPhase3(CHECK_JNI_ERR);
 746 
 747   // cache the system and platform class loaders
 748   SystemDictionary::compute_java_loaders(CHECK_JNI_ERR);
 749 





 750   if (Continuations::enabled()) {
 751     // Initialize Continuation class now so that failure to create enterSpecial/doYield
 752     // special nmethods due to limited CodeCache size can be treated as a fatal error at
 753     // startup with the proper message that CodeCache size is too small.
 754     initialize_class(vmSymbols::jdk_internal_vm_Continuation(), CHECK_JNI_ERR);
 755   }
 756 
 757 #if INCLUDE_CDS
 758   // capture the module path info from the ModuleEntryTable
 759   ClassLoader::initialize_module_path(THREAD);
 760   if (HAS_PENDING_EXCEPTION) {
 761     java_lang_Throwable::print(PENDING_EXCEPTION, tty);
 762     vm_exit_during_initialization("ClassLoader::initialize_module_path() failed unexpectedly");
 763   }
 764 #endif
 765 
 766 #if INCLUDE_JVMCI
 767   if (force_JVMCI_initialization) {
 768     JVMCI::initialize_compiler(CHECK_JNI_ERR);
 769   }
 770 #endif
 771 














 772   if (NativeHeapTrimmer::enabled()) {
 773     NativeHeapTrimmer::initialize();
 774   }
 775 
 776   // Always call even when there are not JVMTI environments yet, since environments
 777   // may be attached late and JVMTI must track phases of VM execution
 778   JvmtiExport::enter_live_phase();
 779 
 780   // Make perfmemory accessible
 781   PerfMemory::set_accessible(true);
 782 
 783   // Notify JVMTI agents that VM initialization is complete - nop if no agents.
 784   JvmtiExport::post_vm_initialized();
 785 
 786   JFR_ONLY(Jfr::on_create_vm_3();)
 787 
 788 #if INCLUDE_MANAGEMENT
 789   Management::initialize(THREAD);
 790 
 791   if (HAS_PENDING_EXCEPTION) {

 800   if (CheckJNICalls)                  JniPeriodicChecker::engage();
 801 
 802   call_postVMInitHook(THREAD);
 803   // The Java side of PostVMInitHook.run must deal with all
 804   // exceptions and provide means of diagnosis.
 805   if (HAS_PENDING_EXCEPTION) {
 806     CLEAR_PENDING_EXCEPTION;
 807   }
 808 
 809   // Let WatcherThread run all registered periodic tasks now.
 810   // NOTE:  All PeriodicTasks should be registered by now. If they
 811   //   aren't, late joiners might appear to start slowly (we might
 812   //   take a while to process their first tick).
 813   WatcherThread::run_all_tasks();
 814 
 815   create_vm_timer.end();
 816 #ifdef ASSERT
 817   _vm_complete = true;
 818 #endif
 819 
 820   if (CDSConfig::is_dumping_static_archive()) {






 821     MetaspaceShared::preload_and_dump();



















 822   }
 823 
 824   return JNI_OK;
 825 }
 826 
 827 // Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when
 828 // the program falls off the end of main(). Another VM exit path is through
 829 // vm_exit(), when the program calls System.exit() to return a value, or when
 830 // there is a serious error in VM.
 831 // These two separate shutdown paths are not exactly the same, but they share
 832 // Shutdown.shutdown() at Java level and before_exit() and VM_Exit op at VM level.
 833 //
 834 // Shutdown sequence:
 835 //   + Shutdown native memory tracking if it is on
 836 //   + Wait until we are the last non-daemon thread to execute
 837 //     <-- every thing is still working at this moment -->
 838 //   + Call java.lang.Shutdown.shutdown(), which will invoke Java level
 839 //        shutdown hooks
 840 //   + Call before_exit(), prepare for VM exit
 841 //      > run VM level shutdown hooks (they are registered through JVM_OnExit(),

   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "c1/c1_Runtime1.hpp"
  28 #include "cds/cds_globals.hpp"
  29 #include "cds/cdsConfig.hpp"
  30 #include "cds/classPreloader.hpp"
  31 #include "cds/heapShared.hpp"
  32 #include "cds/metaspaceShared.hpp"
  33 #include "cds/methodProfiler.hpp"
  34 #include "classfile/classLoader.hpp"
  35 #include "classfile/javaClasses.hpp"
  36 #include "classfile/javaThreadStatus.hpp"
  37 #include "classfile/systemDictionary.hpp"
  38 #include "classfile/systemDictionaryShared.hpp"
  39 #include "classfile/vmClasses.hpp"
  40 #include "classfile/vmSymbols.hpp"
  41 #include "code/SCCache.hpp"
  42 #include "compiler/compilationPolicy.hpp"
  43 #include "compiler/compileBroker.hpp"
  44 #include "compiler/compileTask.hpp"
  45 #include "compiler/compilerThread.hpp"
  46 #include "compiler/precompiler.hpp"
  47 #include "gc/shared/barrierSet.hpp"
  48 #include "gc/shared/barrierSetNMethod.hpp"
  49 #include "gc/shared/gcVMOperations.hpp"
  50 #include "gc/shared/oopStorage.hpp"
  51 #include "gc/shared/oopStorageSet.hpp"
  52 #include "gc/shared/stringdedup/stringDedup.hpp"
  53 #include "interpreter/interpreterRuntime.hpp"
  54 #include "jfr/jfrEvents.hpp"
  55 #include "jvm.h"
  56 #include "jvmtifiles/jvmtiEnv.hpp"
  57 #include "logging/log.hpp"
  58 #include "logging/logAsyncWriter.hpp"
  59 #include "logging/logConfiguration.hpp"
  60 #include "memory/allocation.inline.hpp"
  61 #include "memory/iterator.hpp"
  62 #include "memory/oopFactory.hpp"
  63 #include "memory/resourceArea.hpp"
  64 #include "memory/universe.hpp"
  65 #include "nmt/memTracker.hpp"
  66 #include "oops/instanceKlass.hpp"
  67 #include "oops/klass.inline.hpp"
  68 #include "oops/oop.inline.hpp"
  69 #include "opto/runtime.hpp"
  70 #include "oops/symbol.hpp"
  71 #include "prims/jvm_misc.hpp"
  72 #include "prims/jvmtiAgentList.hpp"
  73 #include "prims/jvmtiEnvBase.hpp"
  74 #include "runtime/arguments.hpp"
  75 #include "runtime/fieldDescriptor.inline.hpp"
  76 #include "runtime/flags/jvmFlagLimit.hpp"
  77 #include "runtime/globals.hpp"
  78 #include "runtime/handles.inline.hpp"
  79 #include "runtime/interfaceSupport.inline.hpp"
  80 #include "runtime/java.hpp"
  81 #include "runtime/javaCalls.hpp"
  82 #include "runtime/javaThread.inline.hpp"
  83 #include "runtime/jniHandles.inline.hpp"
  84 #include "runtime/jniPeriodicChecker.hpp"
  85 #include "runtime/lockStack.inline.hpp"
  86 #include "runtime/monitorDeflationThread.hpp"
  87 #include "runtime/mutexLocker.hpp"
  88 #include "runtime/nonJavaThread.hpp"
  89 #include "runtime/objectMonitor.inline.hpp"

 310 //     enable the startup code to use lambda and other language features in this
 311 //     phase and onward.
 312 //
 313 //     After phase 2, The VM will begin search classes from -Xbootclasspath/a.
 314 static void call_initPhase2(TRAPS) {
 315   TraceTime timer("Initialize module system", TRACETIME_LOG(Info, startuptime));
 316 
 317   Klass* klass = vmClasses::System_klass();
 318 
 319   JavaValue result(T_INT);
 320   JavaCallArguments args;
 321   args.push_int(DisplayVMOutputToStderr);
 322   args.push_int(log_is_enabled(Debug, init)); // print stack trace if exception thrown
 323   JavaCalls::call_static(&result, klass, vmSymbols::initPhase2_name(),
 324                                          vmSymbols::boolean_boolean_int_signature(), &args, CHECK);
 325   if (result.get_jint() != JNI_OK) {
 326     vm_exit_during_initialization(); // no message or exception
 327   }
 328 
 329   universe_post_module_init();
 330 
 331   // Preload all boot classes outside of java.base module
 332   ClassPreloader::runtime_preload(THREAD, Handle());
 333   if (CDSConfig::is_using_full_module_graph()) {
 334     // SystemDictionary::java_{platform,system}_loader are already assigned. We can spin
 335     // this up a little quicker.
 336     assert(SystemDictionary::java_platform_loader() != nullptr, "must be");
 337     assert(SystemDictionary::java_system_loader() != nullptr,   "must be");
 338     ClassPreloader::runtime_preload(THREAD, Handle(THREAD, SystemDictionary::java_platform_loader()));
 339     ClassPreloader::runtime_preload(THREAD, Handle(THREAD, SystemDictionary::java_system_loader()));
 340   }
 341 }
 342 
 343 // Phase 3. final setup - set security manager, system class loader and TCCL
 344 //
 345 //     This will instantiate and set the security manager, set the system class
 346 //     loader as well as the thread context class loader.  The security manager
 347 //     and system class loader may be a custom class loaded from -Xbootclasspath/a,
 348 //     other modules or the application's classpath.
 349 static void call_initPhase3(TRAPS) {
 350   Klass* klass = vmClasses::System_klass();
 351   JavaValue result(T_VOID);
 352   JavaCalls::call_static(&result, klass, vmSymbols::initPhase3_name(),
 353                                          vmSymbols::void_method_signature(), CHECK);
 354 }
 355 
 356 void Threads::initialize_java_lang_classes(JavaThread* main_thread, TRAPS) {
 357   TraceTime timer("Initialize java.lang classes", TRACETIME_LOG(Info, startuptime));
 358 
 359   initialize_class(vmSymbols::java_lang_String(), CHECK);
 360 
 361   // Inject CompactStrings value after the static initializers for String ran.
 362   java_lang_String::set_compact_strings(CompactStrings);
 363 
 364   // Initialize java_lang.System (needed before creating the thread)
 365   initialize_class(vmSymbols::java_lang_System(), CHECK);
 366   // The VM creates & returns objects of this class. Make sure it's initialized.
 367   initialize_class(vmSymbols::java_lang_Class(), CHECK);
 368   initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK);
 369   Handle thread_group = create_initial_thread_group(CHECK);
 370   Universe::set_main_thread_group(thread_group());
 371   initialize_class(vmSymbols::java_lang_Thread(), CHECK);
 372   create_initial_thread(thread_group, main_thread, CHECK);
 373 
 374   HeapShared::init_box_classes(CHECK);
 375 
 376   // The VM creates objects of this class.
 377   initialize_class(vmSymbols::java_lang_Module(), CHECK);
 378 
 379 #ifdef ASSERT
 380   InstanceKlass *k = vmClasses::UnsafeConstants_klass();
 381   assert(k->is_not_initialized(), "UnsafeConstants should not already be initialized");
 382 #endif
 383 
 384   // initialize the hardware-specific constants needed by Unsafe
 385   initialize_class(vmSymbols::jdk_internal_misc_UnsafeConstants(), CHECK);
 386   jdk_internal_misc_UnsafeConstants::set_unsafe_constants();
 387 
 388   // The VM preresolves methods to these classes. Make sure that they get initialized
 389   initialize_class(vmSymbols::java_lang_reflect_Method(), CHECK);
 390   initialize_class(vmSymbols::java_lang_ref_Finalizer(), CHECK);
 391 
 392   // Phase 1 of the system initialization in the library, java.lang.System class initialization
 393   call_initPhase1(CHECK);
 394 
 395   // Get the Java runtime name, version, and vendor info after java.lang.System is initialized.

 404     JDK_Version::set_runtime_name(get_java_version_info(ik, vmSymbols::java_runtime_name_name()));
 405 
 406     JDK_Version::set_runtime_version(get_java_version_info(ik, vmSymbols::java_runtime_version_name()));
 407 
 408     JDK_Version::set_runtime_vendor_version(get_java_version_info(ik, vmSymbols::java_runtime_vendor_version_name()));
 409 
 410     JDK_Version::set_runtime_vendor_vm_bug_url(get_java_version_info(ik, vmSymbols::java_runtime_vendor_vm_bug_url_name()));
 411   }
 412 
 413   // an instance of OutOfMemory exception has been allocated earlier
 414   initialize_class(vmSymbols::java_lang_OutOfMemoryError(), CHECK);
 415   initialize_class(vmSymbols::java_lang_NullPointerException(), CHECK);
 416   initialize_class(vmSymbols::java_lang_ClassCastException(), CHECK);
 417   initialize_class(vmSymbols::java_lang_ArrayStoreException(), CHECK);
 418   initialize_class(vmSymbols::java_lang_ArithmeticException(), CHECK);
 419   initialize_class(vmSymbols::java_lang_StackOverflowError(), CHECK);
 420   initialize_class(vmSymbols::java_lang_IllegalMonitorStateException(), CHECK);
 421   initialize_class(vmSymbols::java_lang_IllegalArgumentException(), CHECK);
 422 }
 423 
 424 bool Threads::initialize_compilation(TRAPS) {
 425   // initialize compiler(s)
 426   bool force_JVMCI_initialization = false;
 427 
 428 #if defined(COMPILER1) || COMPILER2_OR_JVMCI
 429   bool init_compilation = true;
 430 #if INCLUDE_JVMCI
 431   if (EnableJVMCI) {
 432     // Initialize JVMCI eagerly when it is explicitly requested.
 433     // Or when JVMCILibDumpJNIConfig or JVMCIPrintProperties is enabled.
 434     force_JVMCI_initialization = EagerJVMCI || JVMCIPrintProperties || JVMCILibDumpJNIConfig;
 435     if (!force_JVMCI_initialization && UseJVMCICompiler && !UseJVMCINativeLibrary && (!UseInterpreter || !BackgroundCompilation)) {
 436       // Force initialization of jarjvmci otherwise requests for blocking
 437       // compilations will not actually block until jarjvmci is initialized.
 438       force_JVMCI_initialization = true;
 439     }
 440     if (JVMCIPrintProperties || JVMCILibDumpJNIConfig) {
 441       // Both JVMCILibDumpJNIConfig and JVMCIPrintProperties exit the VM
 442       // so compilation should be disabled. This prevents dumping or
 443       // printing from happening more than once.
 444       init_compilation = false;
 445     }
 446   }
 447 #endif
 448   if (init_compilation) {
 449     CompileBroker::compilation_init(CHECK_false);
 450   }
 451 #endif
 452 
 453   return force_JVMCI_initialization;
 454 }
 455 
 456 void Threads::initialize_jsr292_core_classes(TRAPS) {
 457   TraceTime timer("Initialize java.lang.invoke classes", TRACETIME_LOG(Info, startuptime));
 458 
 459   initialize_class(vmSymbols::java_lang_invoke_MethodHandle(), CHECK);
 460   initialize_class(vmSymbols::java_lang_invoke_ResolvedMethodName(), CHECK);
 461   initialize_class(vmSymbols::java_lang_invoke_MemberName(), CHECK);
 462   initialize_class(vmSymbols::java_lang_invoke_MethodHandleNatives(), CHECK);
 463 
 464   if (UseSharedSpaces) {
 465     HeapShared::initialize_java_lang_invoke(CHECK);
 466   }
 467 }
 468 
 469 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) {
 470   extern void JDK_Version_init();
 471 
 472   // Preinitialize version info.
 473   VM_Version::early_initialize();
 474 
 475   // Check version
 476   if (!is_supported_jni_version(args->version)) return JNI_EVERSION;
 477 
 478   // Initialize library-based TLS
 479   ThreadLocalStorage::init();
 480 
 481   // Initialize the output stream module
 482   ostream_init();
 483 
 484   // Process java launcher properties.
 485   Arguments::process_sun_java_launcher_properties(args);
 486 

 572     JavaThread::_jvmci_old_thread_counters = NEW_C_HEAP_ARRAY(jlong, JVMCICounterSize, mtJVMCI);
 573     memset(JavaThread::_jvmci_old_thread_counters, 0, sizeof(jlong) * JVMCICounterSize);
 574   } else {
 575     JavaThread::_jvmci_old_thread_counters = nullptr;
 576   }
 577 #endif // INCLUDE_JVMCI
 578 
 579   // Initialize OopStorage for threadObj
 580   JavaThread::_thread_oop_storage = OopStorageSet::create_strong("Thread OopStorage", mtThread);
 581 
 582   // Attach the main thread to this os thread
 583   JavaThread* main_thread = new JavaThread();
 584   main_thread->set_thread_state(_thread_in_vm);
 585   main_thread->initialize_thread_current();
 586   // must do this before set_active_handles
 587   main_thread->record_stack_base_and_size();
 588   main_thread->register_thread_stack_with_NMT();
 589   main_thread->set_active_handles(JNIHandleBlock::allocate_block());
 590   MACOS_AARCH64_ONLY(main_thread->init_wx());
 591 
 592   MutexLockerImpl::init_counters(); // depends on mutex_init(), perfMemory_init(), and Thread::initialize_thread_current().
 593 
 594   if (!main_thread->set_as_starting_thread()) {
 595     vm_shutdown_during_initialization(
 596                                       "Failed necessary internal allocation. Out of swap space");
 597     main_thread->smr_delete();
 598     *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again
 599     return JNI_ENOMEM;
 600   }
 601 
 602   // Enable guard page *after* os::create_main_thread(), otherwise it would
 603   // crash Linux VM, see notes in os_linux.cpp.
 604   main_thread->stack_overflow_state()->create_stack_guard_pages();
 605 
 606   // Initialize Java-Level synchronization subsystem
 607   ObjectMonitor::Initialize();
 608   ObjectSynchronizer::initialize();
 609 
 610   Deoptimization::init_counters();
 611   VMThread::init_counters();
 612 
 613   // Initialize global modules
 614   jint status = init_globals();
 615   if (status != JNI_OK) {
 616     main_thread->smr_delete();
 617     *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again
 618     return status;
 619   }
 620   if (xtty != nullptr)
 621     xtty->elem("vm_main_thread thread='" UINTX_FORMAT "'",
 622                (uintx) main_thread->osthread()->thread_id());
 623 
 624   // Create WatcherThread as soon as we can since we need it in case
 625   // of hangs during error reporting.
 626   WatcherThread::start();
 627 
 628   // Add main_thread to threads list to finish barrier setup with
 629   // on_thread_attach.  Should be before starting to build Java objects in
 630   // init_globals2, which invokes barriers.
 631   {
 632     MutexLocker mu(Threads_lock);
 633     Threads::add(main_thread);
 634   }
 635 
 636   status = init_globals2();
 637   if (status != JNI_OK) {
 638     Threads::remove(main_thread, false);
 639     // It is possible that we managed to fully initialize Universe but have then
 640     // failed by throwing an exception. In that case our caller JNI_CreateJavaVM
 641     // will want to report it, so we can't delete the main thread.
 642     if (!main_thread->has_pending_exception()) {

 740     if (StartAttachListener || AttachListener::init_at_startup()) {
 741       AttachListener::init();
 742     }
 743   }
 744 
 745   // Launch -Xrun agents if EagerXrunInit is not set.
 746   if (!EagerXrunInit) {
 747     JvmtiAgentList::load_xrun_agents();
 748   }
 749 
 750   Arena::start_chunk_pool_cleaner_task();
 751 
 752   // Start the service thread
 753   // The service thread enqueues JVMTI deferred events and does various hashtable
 754   // and other cleanups.  Needs to start before the compilers start posting events.
 755   ServiceThread::initialize();
 756 
 757   // Start the monitor deflation thread:
 758   MonitorDeflationThread::initialize();
 759 
 760   // Start the method sampler
 761   MethodProfiler::initialize();
 762 
 763   bool force_JVMCI_initialization = initialize_compilation(CHECK_JNI_ERR);
 764 
 765   ClassPreloader::init_javabase_preloaded_classes(CHECK_JNI_ERR);




















 766 
 767   // Start string deduplication thread if requested.
 768   if (StringDedup::is_enabled()) {
 769     StringDedup::start();
 770   }
 771 
 772   // Pre-initialize some JSR292 core classes to avoid deadlock during class loading.
 773   // It is done after compilers are initialized, because otherwise compilations of
 774   // signature polymorphic MH intrinsics can be missed
 775   // (see SystemDictionary::find_method_handle_intrinsic).
 776   initialize_jsr292_core_classes(CHECK_JNI_ERR);
 777 
 778   // This will initialize the module system.  Only java.base classes can be
 779   // loaded until phase 2 completes
 780   call_initPhase2(CHECK_JNI_ERR);
 781 
 782   JFR_ONLY(Jfr::on_create_vm_2();)
 783 
 784   // Always call even when there are not JVMTI environments yet, since environments
 785   // may be attached late and JVMTI must track phases of VM execution
 786   JvmtiExport::enter_start_phase();
 787 
 788   // Notify JVMTI agents that VM has started (JNI is up) - nop if no agents.
 789   JvmtiExport::post_vm_start();
 790 
 791   // Final system initialization including security manager and system class loader
 792   call_initPhase3(CHECK_JNI_ERR);
 793 
 794   // cache the system and platform class loaders
 795   SystemDictionary::compute_java_loaders(CHECK_JNI_ERR);
 796 
 797   // Initiate replay training processing once preloading is over.
 798   CompileBroker::init_training_replay();
 799 
 800   ClassPreloader::replay_training_at_init_for_preloaded_classes(CHECK_JNI_ERR);
 801 
 802   if (Continuations::enabled()) {
 803     // Initialize Continuation class now so that failure to create enterSpecial/doYield
 804     // special nmethods due to limited CodeCache size can be treated as a fatal error at
 805     // startup with the proper message that CodeCache size is too small.
 806     initialize_class(vmSymbols::jdk_internal_vm_Continuation(), CHECK_JNI_ERR);
 807   }
 808 
 809 #if INCLUDE_CDS
 810   // capture the module path info from the ModuleEntryTable
 811   ClassLoader::initialize_module_path(THREAD);
 812   if (HAS_PENDING_EXCEPTION) {
 813     java_lang_Throwable::print(PENDING_EXCEPTION, tty);
 814     vm_exit_during_initialization("ClassLoader::initialize_module_path() failed unexpectedly");
 815   }
 816 #endif
 817 
 818 #if INCLUDE_JVMCI
 819   if (force_JVMCI_initialization) {
 820     JVMCI::initialize_compiler(CHECK_JNI_ERR);
 821   }
 822 #endif
 823 
 824   if (PrecompileCode) {
 825     Precompiler::compile_cached_code(CHECK_JNI_ERR);
 826     if (PrecompileOnlyAndExit) {
 827       SCCache::close();
 828       log_vm_init_stats();
 829       vm_direct_exit(0, "Code precompiation is over");
 830     }
 831   }
 832 
 833 #if defined(COMPILER2)
 834   // Pre-load cached compiled methods
 835   SCCache::preload_code(CHECK_JNI_ERR);
 836 #endif
 837 
 838   if (NativeHeapTrimmer::enabled()) {
 839     NativeHeapTrimmer::initialize();
 840   }
 841 
 842   // Always call even when there are not JVMTI environments yet, since environments
 843   // may be attached late and JVMTI must track phases of VM execution
 844   JvmtiExport::enter_live_phase();
 845 
 846   // Make perfmemory accessible
 847   PerfMemory::set_accessible(true);
 848 
 849   // Notify JVMTI agents that VM initialization is complete - nop if no agents.
 850   JvmtiExport::post_vm_initialized();
 851 
 852   JFR_ONLY(Jfr::on_create_vm_3();)
 853 
 854 #if INCLUDE_MANAGEMENT
 855   Management::initialize(THREAD);
 856 
 857   if (HAS_PENDING_EXCEPTION) {

 866   if (CheckJNICalls)                  JniPeriodicChecker::engage();
 867 
 868   call_postVMInitHook(THREAD);
 869   // The Java side of PostVMInitHook.run must deal with all
 870   // exceptions and provide means of diagnosis.
 871   if (HAS_PENDING_EXCEPTION) {
 872     CLEAR_PENDING_EXCEPTION;
 873   }
 874 
 875   // Let WatcherThread run all registered periodic tasks now.
 876   // NOTE:  All PeriodicTasks should be registered by now. If they
 877   //   aren't, late joiners might appear to start slowly (we might
 878   //   take a while to process their first tick).
 879   WatcherThread::run_all_tasks();
 880 
 881   create_vm_timer.end();
 882 #ifdef ASSERT
 883   _vm_complete = true;
 884 #endif
 885 
 886   if (CDSConfig::is_dumping_classic_static_archive()) {
 887     // Classic -Xshare:dump, aka "old workflow"
 888     MetaspaceShared::preload_and_dump();
 889   } else if (CDSConfig::is_dumping_final_static_archive()) {
 890     // TODO: copy the verification and loader constraints from preimage to final image
 891     // TODO: load archived classes for custom loaders as well.
 892     log_info(cds)("Dumping final image of CacheDataStore %s", CacheDataStore);
 893     MetaspaceShared::preload_and_dump();
 894     vm_direct_exit(0, "CacheDataStore dumping is complete");
 895   }
 896 
 897   log_info(init)("Before main:");
 898   log_vm_init_stats();
 899 
 900   if (UsePerfData) {
 901     if (ProfileVMLocks) {
 902       main_thread->set_profile_vm_locks(true);
 903     }
 904     if (ProfileVMCalls) {
 905       main_thread->set_profile_vm_calls(true);
 906     }
 907     if (ProfileRuntimeCalls) {
 908       main_thread->set_profile_rt_calls(true);
 909     }
 910     if (ProfileVMOps) {
 911       main_thread->set_profile_vm_ops(true);
 912     }
 913   }
 914 
 915   return JNI_OK;
 916 }
 917 
 918 // Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when
 919 // the program falls off the end of main(). Another VM exit path is through
 920 // vm_exit(), when the program calls System.exit() to return a value, or when
 921 // there is a serious error in VM.
 922 // These two separate shutdown paths are not exactly the same, but they share
 923 // Shutdown.shutdown() at Java level and before_exit() and VM_Exit op at VM level.
 924 //
 925 // Shutdown sequence:
 926 //   + Shutdown native memory tracking if it is on
 927 //   + Wait until we are the last non-daemon thread to execute
 928 //     <-- every thing is still working at this moment -->
 929 //   + Call java.lang.Shutdown.shutdown(), which will invoke Java level
 930 //        shutdown hooks
 931 //   + Call before_exit(), prepare for VM exit
 932 //      > run VM level shutdown hooks (they are registered through JVM_OnExit(),
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