src/hotspot/share/runtime/thread.inline.hpp - master - githubmirror/panama-vector

src/hotspot/share/runtime/thread.inline.hpp
99 строк3 KB
Albert Mingkun Yang
8378178: Change Thread::_allocated_bytes from jlong to uint64_t
20 фев 2026, 12:01
20 фев 2026, 12:017ec561f
/*
 * Copyright (c) 2012, 2026, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2021, Azul Systems, Inc. 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.
 *
 */

#ifndef SHARE_RUNTIME_THREAD_INLINE_HPP
#define SHARE_RUNTIME_THREAD_INLINE_HPP

#include "runtime/thread.hpp"

#include "gc/shared/tlab_globals.hpp"
#include "runtime/atomicAccess.hpp"
#include "utilities/permitForbiddenFunctions.hpp"

#ifdef MACOS_AARCH64
#include "runtime/os.hpp"
#endif

inline uint64_t Thread::cooked_allocated_bytes() const {
  uint64_t allocated_bytes = AtomicAccess::load_acquire(&_allocated_bytes);
  size_t used_bytes = 0;
  if (UseTLAB) {
    // cooked_used_bytes() does its best to not return implausible values, but
    // there is still a potential race between incrementing _allocated_bytes and
    // clearing the TLAB, that might cause double-counting.
    used_bytes = tlab().estimated_used_bytes();
  }
  return allocated_bytes + used_bytes;
}

inline ThreadsList* Thread::cmpxchg_threads_hazard_ptr(ThreadsList* exchange_value, ThreadsList* compare_value) {
  return (ThreadsList*)AtomicAccess::cmpxchg(&_threads_hazard_ptr, compare_value, exchange_value);
}

inline ThreadsList* Thread::get_threads_hazard_ptr() const {
  return (ThreadsList*)AtomicAccess::load_acquire(&_threads_hazard_ptr);
}

inline void Thread::set_threads_hazard_ptr(ThreadsList* new_list) {
  AtomicAccess::release_store_fence(&_threads_hazard_ptr, new_list);
}

#if defined(__APPLE__) && defined(AARCH64)

static void dummy() { }

inline void Thread::init_wx() {
  assert(this == Thread::current(), "should only be called for current thread");
  assert(!_wx_init, "second init");
  _wx_state = WXWrite;
  permit_forbidden_function::pthread_jit_write_protect_np(false);
  os::current_thread_enable_wx(_wx_state);
  // Side effect: preload base address of libjvm
  guarantee(os::address_is_in_vm(CAST_FROM_FN_PTR(address, &dummy)), "must be");
  DEBUG_ONLY(_wx_init = true);
}

inline WXMode Thread::enable_wx(WXMode new_state) {
  assert(this == Thread::current(), "should only be called for current thread");
  assert(_wx_init, "should be inited");
  WXMode old = _wx_state;
  if (_wx_state != new_state) {
    _wx_state = new_state;
    switch (new_state) {
      case WXWrite:
      case WXExec:
        os::current_thread_enable_wx(new_state);
        break;
      case WXArmedForWrite:
        break;
      default: ShouldNotReachHere();  break;
    }
  }
  return old;
}

#endif // __APPLE__ && AARCH64

#endif // SHARE_RUNTIME_THREAD_INLINE_HPP