8220592: ZGC: Move destruction of detached ZPages into ZPageAllocator
Reviewed-by: stefank, eosterlund
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* 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.
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#include "precompiled.hpp"
#include "gc/z/zLock.inline.hpp"
#include "gc/z/zNMethodData.hpp"
#include "memory/allocation.hpp"
#include "runtime/atomic.hpp"
#include "runtime/orderAccess.hpp"
#include "utilities/align.hpp"
#include "utilities/debug.hpp"
#include "utilities/growableArray.hpp"
size_t ZNMethodDataOops::header_size() {
const size_t size = sizeof(ZNMethodDataOops);
assert(is_aligned(size, sizeof(oop*)), "Header misaligned");
return size;
}
ZNMethodDataOops* ZNMethodDataOops::create(const GrowableArray<oop*>& immediates, bool has_non_immediates) {
// Allocate memory for the ZNMethodDataOops object
// plus the immediate oop* array that follows right after.
const size_t size = ZNMethodDataOops::header_size() + (sizeof(oop*) * immediates.length());
void* const mem = NEW_C_HEAP_ARRAY(uint8_t, size, mtGC);
return ::new (mem) ZNMethodDataOops(immediates, has_non_immediates);
}
void ZNMethodDataOops::destroy(ZNMethodDataOops* oops) {
FREE_C_HEAP_ARRAY(uint8_t, oops);
}
ZNMethodDataOops::ZNMethodDataOops(const GrowableArray<oop*>& immediates, bool has_non_immediates) :
_nimmediates(immediates.length()),
_has_non_immediates(has_non_immediates) {
// Save all immediate oops
for (size_t i = 0; i < _nimmediates; i++) {
immediates_begin()[i] = immediates.at(i);
}
}
size_t ZNMethodDataOops::immediates_count() const {
return _nimmediates;
}
oop** ZNMethodDataOops::immediates_begin() const {
// The immediate oop* array starts immediately after this object
return (oop**)((uintptr_t)this + header_size());
}
oop** ZNMethodDataOops::immediates_end() const {
return immediates_begin() + immediates_count();
}
bool ZNMethodDataOops::has_non_immediates() const {
return _has_non_immediates;
}
ZNMethodData::ZNMethodData() :
_lock(),
_oops(NULL) {}
ZNMethodData::~ZNMethodData() {
ZNMethodDataOops::destroy(_oops);
}
ZReentrantLock* ZNMethodData::lock() {
return &_lock;
}
ZNMethodDataOops* ZNMethodData::oops() const {
return OrderAccess::load_acquire(&_oops);
}
ZNMethodDataOops* ZNMethodData::swap_oops(ZNMethodDataOops* new_oops) {
ZLocker<ZReentrantLock> locker(&_lock);
ZNMethodDataOops* const old_oops = _oops;
_oops = new_oops;
return old_oops;
}