/*
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* Copyright ( c ) 2020 , 2021 SAP SE . 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 ) .
*
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* 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/metaspace/metaspaceArena.hpp"
#include "memory/metaspace/metaspaceArenaGrowthPolicy.hpp"
#include "memory/metaspace/metaspaceContext.hpp"
#include "memory/metaspace/testHelpers.hpp"
#include "runtime/mutexLocker.hpp"
#include "runtime/os.hpp"
#include "utilities/debug.hpp"
#include "utilities/globalDefinitions.hpp"
#include "utilities/ostream.hpp"
namespace metaspace {
///// MetaspaceTestArena //////
MetaspaceTestArena::MetaspaceTestArena(Mutex* lock, MetaspaceArena* arena) :
_lock(lock),
_arena(arena)
{}
MetaspaceTestArena::~MetaspaceTestArena() {
delete _arena;
delete _lock;
}
MetaWord* MetaspaceTestArena::allocate(size_t word_size) {
return _arena->allocate(word_size);
}
void MetaspaceTestArena::deallocate(MetaWord* p, size_t word_size) {
return _arena->deallocate(p, word_size);
}
///// MetaspaceTestArea //////
MetaspaceTestContext::MetaspaceTestContext(const char * name, size_t commit_limit, size_t reserve_limit) :
_name(name),
_reserve_limit(reserve_limit),
_commit_limit(commit_limit),
_context(NULL),
_commit_limiter(commit_limit == 0 ? max_uintx : commit_limit), // commit_limit == 0 -> no limit
_used_words_counter(),
_rs()
{
assert(is_aligned(reserve_limit, Metaspace::reserve_alignment_words()), "reserve_limit (" SIZE_FORMAT ") "
"not aligned to metaspace reserve alignment (" SIZE_FORMAT ")" ,
reserve_limit, Metaspace::reserve_alignment_words());
if (reserve_limit > 0 ) {
// have reserve limit -> non-expandable context
_rs = ReservedSpace(reserve_limit * BytesPerWord, Metaspace::reserve_alignment(), os::vm_page_size());
_context = MetaspaceContext::create_nonexpandable_context(name, _rs, &_commit_limiter);
} else {
// no reserve limit -> expandable vslist
_context = MetaspaceContext::create_expandable_context(name, &_commit_limiter);
}
}
MetaspaceTestContext::~MetaspaceTestContext() {
DEBUG_ONLY(verify();)
MutexLocker fcl(Metaspace_lock, Mutex::_no_safepoint_check_flag);
delete _context;
if (_rs.is_reserved()) {
_rs.release();
}
}
// Create an arena, feeding off this area.
MetaspaceTestArena* MetaspaceTestContext::create_arena(Metaspace::MetaspaceType type) {
const ArenaGrowthPolicy* growth_policy = ArenaGrowthPolicy::policy_for_space_type(type, false );
Mutex* lock = new Mutex(Monitor::nosafepoint, "MetaspaceTestArea_lock" );
MetaspaceArena* arena = NULL;
{
MutexLocker ml(lock, Mutex::_no_safepoint_check_flag);
arena = new MetaspaceArena(_context->cm(), growth_policy, lock, &_used_words_counter, _name);
}
return new MetaspaceTestArena(lock, arena);
}
void MetaspaceTestContext::purge_area() {
_context->cm()->purge();
}
#ifdef ASSERT
void MetaspaceTestContext::verify() const {
if (_context != NULL) {
_context->verify();
}
}
#endif
void MetaspaceTestContext::print_on(outputStream* st) const {
_context->print_on(st);
}
} // namespace metaspace
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(vorverarbeitet am 2026-06-10)
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