src/hotspot/share/memory/resourceArea.cpp

/*
 * Copyright (c) 1997, 2022, 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
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 *
 * 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.
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#include "precompiled.hpp"
#include "memory/allocation.inline.hpp"
#include "memory/resourceArea.inline.hpp"
#include "runtime/atomic.hpp"
#include "runtime/javaThread.hpp"
#include "services/memTracker.hpp"
#include "utilities/vmError.hpp"

void ResourceArea::bias_to(MEMFLAGS new_flags) {
  if (new_flags != _flags) {
    size_t size = size_in_bytes();
    MemTracker::record_arena_size_change(-ssize_t(size), _flags);
    MemTracker::record_arena_free(_flags);
    MemTracker::record_new_arena(new_flags);
    MemTracker::record_arena_size_change(ssize_t(size), new_flags);
    _flags = new_flags;
  }
}

#ifdef ASSERT

void ResourceArea::verify_has_resource_mark() {
  if (_nesting <= 0 && !VMError::is_error_reported()) {
    // Only report the first occurrence of an allocating thread that
    // is missing a ResourceMark, to avoid possible recursive errors
    // in error handling.
    static volatile bool reported = false;
    if (!Atomic::load(&reported)) {
      if (!Atomic::cmpxchg(&reported, false, true)) {
        fatal("memory leak: allocating without ResourceMark");
      }
    }
  }
}

#endif // ASSERT

//------------------------------ResourceMark-----------------------------------
// The following routines are declared in allocation.hpp and used everywhere:

// Allocation in thread-local resource area
extern char* resource_allocate_bytes(size_t size, AllocFailType alloc_failmode) {
  return Thread::current()->resource_area()->allocate_bytes(size, alloc_failmode);
}
extern char* resource_allocate_bytes(Thread* thread, size_t size, AllocFailType alloc_failmode) {
  return thread->resource_area()->allocate_bytes(size, alloc_failmode);
}

extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size, AllocFailType alloc_failmode){
  return (char*)Thread::current()->resource_area()->Arealloc(old, old_size, new_size, alloc_failmode);
}

extern void resource_free_bytes( Thread* thread, char *old, size_t size ) {
  thread->resource_area()->Afree(old, size);
}