Quellcode-Bibliothek

^© Kompilation durch diese Firma

[Weder Korrektheit noch Funktionsfähigkeit der Software werden zugesichert.]

Datei: jvmci.cpp Sprache: C

/*
* Copyright (c) 2019, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

#include "precompiled.hpp"
#include "classfile/systemDictionary.hpp"
#include "compiler/compileTask.hpp"
#include "compiler/compilerThread.hpp"
#include "gc/shared/collectedHeap.hpp"
#include "jvmci/jvmci.hpp"
#include "jvmci/jvmciJavaClasses.hpp"
#include "jvmci/jvmciEnv.hpp"
#include "jvmci/jvmciRuntime.hpp"
#include "jvmci/metadataHandles.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.hpp"
#include "runtime/arguments.hpp"
#include "runtime/atomic.hpp"
#include "runtime/javaThread.inline.hpp"
#include "runtime/os.hpp"
#include "utilities/events.hpp"

JVMCIRuntime* JVMCI::_compiler_runtimes = nullptr;
JVMCIRuntime* JVMCI::_java_runtime = nullptr;
JVMCIRuntime* JVMCI::_shutdown_compiler_runtime = nullptr;
volatile bool JVMCI::_is_initialized = false;
bool JVMCI::_box_caches_initialized = false;
void* JVMCI::_shared_library_handle = nullptr;
char* JVMCI::_shared_library_path = nullptr;
volatile bool JVMCI::_in_shutdown = false;
StringEventLog* JVMCI::_events = nullptr;
StringEventLog* JVMCI::_verbose_events = nullptr;
volatile intx JVMCI::_fatal_log_init_thread = -1;
volatile int JVMCI::_fatal_log_fd = -1;
const char* JVMCI::_fatal_log_filename = nullptr;

void jvmci_vmStructs_init() NOT_DEBUG_RETURN;

bool JVMCI::can_initialize_JVMCI() {
  // Initializing JVMCI requires the module system to be initialized past phase 3.
  // The JVMCI API itself isn't available until phase 2 and ServiceLoader (which
  // JVMCI initialization requires) isn't usable until after phase 3. Testing
  // whether the system loader is initialized satisfies all these invariants.
  if (SystemDictionary::java_system_loader() == NULL) {
    return false;
  }
  assert(Universe::is_module_initialized(), "must be");
  return true;
}

void* JVMCI::get_shared_library(char*& path, bool load) {
  void* sl_handle = _shared_library_handle;
  if (sl_handle != NULL || !load) {
    path = _shared_library_path;
    return sl_handle;
  }
  MutexLocker locker(JVMCI_lock);
  path = NULL;
  if (_shared_library_handle == NULL) {
    char path[JVM_MAXPATHLEN];
    char ebuf[1024];
    if (JVMCILibPath != NULL) {
      if (!os::dll_locate_lib(path, sizeof(path), JVMCILibPath, JVMCI_SHARED_LIBRARY_NAME)) {
        fatal("Unable to create path to JVMCI shared library based on value of JVMCILibPath (%s)", JVMCILibPath);
      }
    } else {
      if (!os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), JVMCI_SHARED_LIBRARY_NAME)) {
        fatal("Unable to create path to JVMCI shared library");
      }
    }

    void* handle = os::dll_load(path, ebuf, sizeof ebuf);
    if (handle == NULL) {
      fatal("Unable to load JVMCI shared library from %s: %s", path, ebuf);
    }
    _shared_library_handle = handle;
    _shared_library_path = os::strdup(path);

    JVMCI_event_1("loaded JVMCI shared library from %s", path);
  }
  path = _shared_library_path;
  return _shared_library_handle;
}

void JVMCI::initialize_compiler(TRAPS) {
  if (JVMCILibDumpJNIConfig) {
    JNIJVMCI::initialize_ids(NULL);
    ShouldNotReachHere();
  }
  JVMCIRuntime* runtime;
  if (UseJVMCINativeLibrary) {
      runtime = JVMCI::compiler_runtime((JavaThread*) THREAD);
  } else {
      runtime = JVMCI::java_runtime();
  }
  runtime->call_getCompiler(CHECK);
}

void JVMCI::initialize_globals() {
  jvmci_vmStructs_init();
  if (LogEvents) {
    if (JVMCIEventLogLevel > 0) {
      _events = new StringEventLog("JVMCI Events", "jvmci");
      if (JVMCIEventLogLevel > 1) {
        int count = LogEventsBufferEntries;
        for (int i = 1; i < JVMCIEventLogLevel && i < max_EventLog_level; i++) {
          // Expand event buffer by 10x for each level above 1
          count = count * 10;
        }
        _verbose_events = new StringEventLog("Verbose JVMCI Events", "verbose-jvmci", count);
      }
    }
  }
  _java_runtime = new JVMCIRuntime(nullptr, -1, false);
  if (using_singleton_shared_library_runtime()) {
    JVMCI::_compiler_runtimes = new JVMCIRuntime(nullptr, 0, true);
  }
}

void JVMCI::ensure_box_caches_initialized(TRAPS) {
  if (_box_caches_initialized) {
    return;
  }

  // While multiple threads may reach here, that's fine
  // since class initialization is synchronized.
  Symbol* box_classes[] = {
    java_lang_Boolean::symbol(),
    java_lang_Byte_ByteCache::symbol(),
    java_lang_Short_ShortCache::symbol(),
    java_lang_Character_CharacterCache::symbol(),
    java_lang_Integer_IntegerCache::symbol(),
    java_lang_Long_LongCache::symbol()
  };

  for (unsigned i = 0; i < sizeof(box_classes) / sizeof(Symbol*); i++) {
    Klass* k = SystemDictionary::resolve_or_fail(box_classes[i], true, CHECK);
    InstanceKlass* ik = InstanceKlass::cast(k);
    if (ik->is_not_initialized()) {
      ik->initialize(CHECK);
    }
  }
  _box_caches_initialized = true;
}

JVMCIRuntime* JVMCI::compiler_runtime(JavaThread* thread, bool create) {
  assert(thread->is_Java_thread(), "must be") ;
  assert(UseJVMCINativeLibrary, "must be");
  JVMCIRuntime* runtime = thread->libjvmci_runtime();
  if (runtime == nullptr && create) {
    runtime = JVMCIRuntime::for_thread(thread);
  }
  return runtime;
}

JavaThread* JVMCI::compilation_tick(JavaThread* thread) {
  if (thread->is_Compiler_thread()) {
    CompileTask *task = CompilerThread::cast(thread)->task();
    if (task != NULL) {
      JVMCICompileState *state = task->blocking_jvmci_compile_state();
      if (state != NULL) {
        state->inc_compilation_ticks();
      }
    }
  }
  return thread;
}

void JVMCI::metadata_do(void f(Metadata*)) {
  if (_java_runtime != nullptr) {
    _java_runtime->_metadata_handles->metadata_do(f);
  }
  for (JVMCIRuntime* runtime = _compiler_runtimes; runtime != nullptr; runtime = runtime->_next) {
    runtime->_metadata_handles->metadata_do(f);
  }
  if (_shutdown_compiler_runtime != nullptr) {
    _shutdown_compiler_runtime->_metadata_handles->metadata_do(f);
  }
}

void JVMCI::do_unloading(bool unloading_occurred) {
  if (unloading_occurred) {
    if (_java_runtime != nullptr) {
      _java_runtime->_metadata_handles->do_unloading();
    }
    for (JVMCIRuntime* runtime = _compiler_runtimes; runtime != nullptr; runtime = runtime->_next) {
      runtime->_metadata_handles->do_unloading();
    }
    if (_shutdown_compiler_runtime != nullptr) {
      _shutdown_compiler_runtime->_metadata_handles->do_unloading();
    }
  }
}

bool JVMCI::is_compiler_initialized() {
  return _is_initialized;
}

void JVMCI::vlog(int level, const char* format, va_list ap) {
  if (LogEvents && JVMCIEventLogLevel >= level) {
    StringEventLog* events = level == 1 ? _events : _verbose_events;
    guarantee(events != nullptr, "JVMCI event log not yet initialized");
    Thread* thread = Thread::current_or_null_safe();
    if (thread != nullptr) {
      events->logv(thread, format, ap);
    }
  }
}

void JVMCI::vtrace(int level, const char* format, va_list ap) {
  if (JVMCITraceLevel >= level) {
    Thread* thread = Thread::current_or_null_safe();
    if (thread != nullptr && thread->is_Java_thread()) {
      ResourceMark rm(thread);
      JavaThreadState state = JavaThread::cast(thread)->thread_state();
      if (state == _thread_in_vm || state == _thread_in_Java || state == _thread_new) {
        tty->print("JVMCITrace-%d[%s]:%*c", level, thread->name(), level, ' ');
      } else {
        // According to check_access_thread_state, it's unsafe to
        // resolve the j.l.Thread object unless the thread is in
        // one of the states above.
        tty->print("JVMCITrace-%d[%s@" PTR_FORMAT "]:%*c", level, thread->type_name(), p2i(thread), level, ' ');
      }
    } else {
      tty->print("JVMCITrace-%d[?]:%*c", level, level, ' ');
    }
    tty->vprint_cr(format, ap);
  }
}

#define LOG_TRACE(level) { va_list ap; \
  va_start(ap, format); vlog(level, format, ap); va_end(ap); \
  va_start(ap, format); vtrace(level, format, ap); va_end(ap); \
}

void JVMCI::event(int level, const char* format, ...) LOG_TRACE(level)
void JVMCI::event1(const char* format, ...) LOG_TRACE(1)
void JVMCI::event2(const char* format, ...) LOG_TRACE(2)
void JVMCI::event3(const char* format, ...) LOG_TRACE(3)
void JVMCI::event4(const char* format, ...) LOG_TRACE(4)

#undef LOG_TRACE

void JVMCI::shutdown(JavaThread* thread) {
  ResourceMark rm;
  {
    MutexLocker locker(JVMCI_lock);
    _in_shutdown = true;
    JVMCI_event_1("shutting down JVMCI");
  }
  JVMCIRuntime* java_runtime = _java_runtime;
  if (java_runtime != nullptr) {
    java_runtime->shutdown();
  }
  JVMCIRuntime* runtime = thread->libjvmci_runtime();
  if (runtime != nullptr) {
    runtime->detach_thread(thread, "JVMCI shutdown");
  }
  {
    // Attach to JVMCI initialized runtimes that are not already shutting down
    // and shut them down. This ensures HotSpotJVMCIRuntime.shutdown() is called
    // for each JVMCI runtime.
    MutexLocker locker(JVMCI_lock);
    for (JVMCIRuntime* rt = JVMCI::_compiler_runtimes; rt != nullptr; rt = rt->_next) {
      if (rt->is_HotSpotJVMCIRuntime_initialized() && rt->_num_attached_threads != JVMCIRuntime::cannot_be_attached) {
        rt->_num_attached_threads++;
        {
          MutexUnlocker unlocker(JVMCI_lock);
          rt->attach_thread(thread);
          rt->shutdown();
          rt->detach_thread(thread, "JVMCI shutdown");
        }
      }
    }
  }
}

bool JVMCI::in_shutdown() {
  return _in_shutdown;
}

void JVMCI::fatal_log(const char* buf, size_t count) {
  intx current_thread_id = os::current_thread_id();
  intx invalid_id = -1;
  int log_fd;
  if (_fatal_log_init_thread == invalid_id && Atomic::cmpxchg(&_fatal_log_init_thread, invalid_id, current_thread_id) == invalid_id) {
    if (ErrorFileToStdout) {
      log_fd = 1;
    } else if (ErrorFileToStderr) {
      log_fd = 2;
    } else {
      static char name_buffer[O_BUFLEN];
      log_fd = VMError::prepare_log_file(JVMCINativeLibraryErrorFile, LIBJVMCI_ERR_FILE, true, name_buffer, sizeof(name_buffer));
      if (log_fd != -1) {
        _fatal_log_filename = name_buffer;
      } else {
        int e = errno;
        tty->print("Can't open JVMCI shared library error report file. Error: ");
        tty->print_raw_cr(os::strerror(e));
        tty->print_cr("JVMCI shared library error report will be written to console.");

        // See notes in VMError::report_and_die about hard coding tty to 1
        log_fd = 1;
      }
    }
    _fatal_log_fd = log_fd;
  } else {
    // Another thread won the race to initialize the stream. Give it time
    // to complete initialization. VM locks cannot be used as the current
    // thread might not be attached to the VM (e.g. a native thread started
    // within libjvmci).
    while (_fatal_log_fd == -1) {
      os::naked_short_sleep(50);
    }
  }
  fdStream log(_fatal_log_fd);
  log.write(buf, count);
  log.flush();
}

¤ Dauer der Verarbeitung: 0.16 Sekunden (vorverarbeitet) ¤

Download des Quellennavigators
Download des sprechenden Kalenders
in der Quellcodebibliothek suchen

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.