1 /*
   2  * Copyright (c) 2015, 2017, 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 #ifndef SHARE_VM_GC_G1_G1ALLOCATOR_INLINE_HPP
  26 #define SHARE_VM_GC_G1_G1ALLOCATOR_INLINE_HPP
  27 
  28 #include "gc/g1/g1Allocator.hpp"
  29 #include "gc/g1/g1AllocRegion.inline.hpp"
  30 #include "gc/shared/plab.inline.hpp"
  31 
  32 HeapWord* G1Allocator::attempt_allocation(size_t word_size, AllocationContext_t context) {
  33   return mutator_alloc_region(context)->attempt_allocation(word_size, false /* bot_updates */);
  34 }
  35 
  36 HeapWord* G1Allocator::attempt_allocation_locked(size_t word_size, AllocationContext_t context) {
  37   HeapWord* result = mutator_alloc_region(context)->attempt_allocation_locked(word_size, false /* bot_updates */);
  38   assert(result != NULL || mutator_alloc_region(context)->get() == NULL,
  39          "Must not have a mutator alloc region if there is no memory, but is " PTR_FORMAT, p2i(mutator_alloc_region(context)->get()));
  40   return result;
  41 }
  42 
  43 HeapWord* G1Allocator::attempt_allocation_force(size_t word_size, AllocationContext_t context) {
  44   return mutator_alloc_region(context)->attempt_allocation_force(word_size, false /* bot_updates */);
  45 }
  46 
  47 inline HeapWord* G1PLABAllocator::plab_allocate(InCSetState dest,
  48                                                 size_t word_sz,
  49                                                 AllocationContext_t context) {
  50   G1PLAB* buffer = alloc_buffer(dest, context);
  51   if (_survivor_alignment_bytes == 0 || !dest.is_young()) {
  52     return buffer->allocate(word_sz);
  53   } else {
  54     return buffer->allocate_aligned(word_sz, _survivor_alignment_bytes);
  55   }
  56 }
  57 
  58 // Create the _archive_region_map which is used to identify archive objects.
  59 inline void G1ArchiveAllocator::enable_archive_object_check() {
  60   assert(!_archive_check_enabled, "archive range check already enabled");
  61   _archive_check_enabled = true;
  62   size_t length = GC::gc()->heap()->max_capacity();
  63   _archive_region_map.initialize((HeapWord*) GC::gc()->heap()->base(),
  64                                  (HeapWord*) GC::gc()->heap()->base() + length,
  65                                  HeapRegion::GrainBytes);
  66 }
  67 
  68 // Set the regions containing the specified address range as archive/non-archive.
  69 inline void G1ArchiveAllocator::set_range_archive(MemRegion range, bool is_archive) {
  70   assert(_archive_check_enabled, "archive range check not enabled");
  71   _archive_region_map.set_by_address(range, is_archive);
  72 }
  73 
  74 // Check if an object is in an archive region using the _archive_region_map.
  75 inline bool G1ArchiveAllocator::in_archive_range(oop object) {
  76   // This is the out-of-line part of is_archive_object test, done separately
  77   // to avoid additional performance impact when the check is not enabled.
  78   return _archive_region_map.get_by_address((HeapWord*)object);
  79 }
  80 
  81 // Check if archive object checking is enabled, to avoid calling in_archive_range
  82 // unnecessarily.
  83 inline bool G1ArchiveAllocator::archive_check_enabled() {
  84   return _archive_check_enabled;
  85 }
  86 
  87 inline bool G1ArchiveAllocator::is_archive_object(oop object) {
  88   return (archive_check_enabled() && in_archive_range(object));
  89 }
  90 
  91 #endif // SHARE_VM_GC_G1_G1ALLOCATOR_HPP