1 /*
  2  * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
  3  * Copyright (c) 2020, 2021 SAP SE. All rights reserved.
  4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  5  *
  6  * This code is free software; you can redistribute it and/or modify it
  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 "memory/metaspace/metaspaceArena.hpp"
 28 #include "memory/metaspace/metaspaceArenaGrowthPolicy.hpp"
 29 #include "memory/metaspace/metaspaceContext.hpp"
 30 #include "memory/metaspace/testHelpers.hpp"
 31 #include "runtime/mutexLocker.hpp"
 32 #include "utilities/debug.hpp"
 33 #include "utilities/globalDefinitions.hpp"
 34 #include "utilities/ostream.hpp"
 35 
 36 namespace metaspace {
 37 
 38 ///// MetaspaceTestArena //////
 39 
 40 MetaspaceTestArena::MetaspaceTestArena(Mutex* lock, MetaspaceArena* arena) :
 41   _lock(lock),
 42   _arena(arena)
 43 {}
 44 
 45 MetaspaceTestArena::~MetaspaceTestArena() {
 46   delete _arena;
 47   delete _lock;
 48 }
 49 
 50 MetaWord* MetaspaceTestArena::allocate(size_t word_size) {
 51   return _arena->allocate(word_size);
 52 }
 53 
 54 void MetaspaceTestArena::deallocate(MetaWord* p, size_t word_size) {
 55   return _arena->deallocate(p, word_size);
 56 }
 57 
 58 ///// MetaspaceTestArea //////
 59 
 60 MetaspaceTestContext::MetaspaceTestContext(const char* name, size_t commit_limit, size_t reserve_limit) :
 61   _name(name),
 62   _reserve_limit(reserve_limit),
 63   _commit_limit(commit_limit),
 64   _context(NULL),
 65   _commit_limiter(commit_limit == 0 ? max_uintx : commit_limit), // commit_limit == 0 -> no limit
 66   _used_words_counter(),
 67   _rs()
 68 {
 69   assert(is_aligned(reserve_limit, Metaspace::reserve_alignment_words()), "reserve_limit (" SIZE_FORMAT ") "
 70                     "not aligned to metaspace reserve alignment (" SIZE_FORMAT ")",
 71                     reserve_limit, Metaspace::reserve_alignment_words());
 72   if (reserve_limit > 0) {
 73     // have reserve limit -> non-expandable context
 74     _rs = ReservedSpace(reserve_limit * BytesPerWord, Metaspace::reserve_alignment(), os::vm_page_size());
 75     _context = MetaspaceContext::create_nonexpandable_context(name, _rs, &_commit_limiter);
 76   } else {
 77     // no reserve limit -> expandable vslist
 78     _context = MetaspaceContext::create_expandable_context(name, &_commit_limiter);
 79   }
 80 
 81 }
 82 
 83 MetaspaceTestContext::~MetaspaceTestContext() {
 84   DEBUG_ONLY(verify();)
 85   MutexLocker fcl(Metaspace_lock, Mutex::_no_safepoint_check_flag);
 86   delete _context;
 87   if (_rs.is_reserved()) {
 88     _rs.release();
 89   }
 90 }
 91 
 92 // Create an arena, feeding off this area.
 93 MetaspaceTestArena* MetaspaceTestContext::create_arena(Metaspace::MetaspaceType type) {
 94   const ArenaGrowthPolicy* growth_policy = ArenaGrowthPolicy::policy_for_space_type(type, false);
 95   Mutex* lock = new Mutex(Monitor::nosafepoint, "MetaspaceTestArea_lock");
 96   MetaspaceArena* arena = NULL;
 97   {
 98     MutexLocker ml(lock,  Mutex::_no_safepoint_check_flag);
 99     arena = new MetaspaceArena(_context->cm(), growth_policy, lock, &_used_words_counter, _name);
100   }
101   return new MetaspaceTestArena(lock, arena);
102 }
103 
104 void MetaspaceTestContext::purge_area() {
105   _context->cm()->purge();
106 }
107 
108 #ifdef ASSERT
109 void MetaspaceTestContext::verify() const {
110   if (_context != NULL) {
111     _context->verify();
112   }
113 }
114 #endif
115 
116 void MetaspaceTestContext::print_on(outputStream* st) const {
117   _context->print_on(st);
118 }
119 
120 } // namespace metaspace
121