mirror of
https://github.com/openjdk/jdk.git
synced 2026-02-19 06:45:17 +00:00
111 lines
4.1 KiB
C++
111 lines
4.1 KiB
C++
/*
|
|
* Copyright (c) 1998, 2023, 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
|
|
* 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.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*
|
|
*/
|
|
|
|
#ifndef SHARE_RUNTIME_HANDLES_INLINE_HPP
|
|
#define SHARE_RUNTIME_HANDLES_INLINE_HPP
|
|
|
|
#include "runtime/handles.hpp"
|
|
|
|
#include "runtime/javaThread.hpp"
|
|
#include "oops/metadata.hpp"
|
|
#include "oops/oop.hpp"
|
|
|
|
// these inline functions are in a separate file to break an include cycle
|
|
// between Thread and Handle
|
|
|
|
inline Handle::Handle(Thread* thread, oop obj) {
|
|
assert(thread == Thread::current(), "sanity check");
|
|
if (obj == nullptr) {
|
|
_handle = nullptr;
|
|
} else {
|
|
_handle = thread->handle_area()->allocate_handle(obj);
|
|
}
|
|
}
|
|
|
|
inline void Handle::replace(oop obj) {
|
|
// Unlike in OopHandle::replace, we shouldn't use a barrier here.
|
|
// OopHandle has its storage in OopStorage, which is walked concurrently and uses barriers.
|
|
// Handle is thread private, and iterated by Thread::oops_do, which is why it shouldn't have any barriers at all.
|
|
assert(_handle != nullptr, "should not use replace");
|
|
*_handle = obj;
|
|
}
|
|
|
|
// Inline constructors for Specific Handles for different oop types
|
|
#define DEF_HANDLE_CONSTR(type, is_a) \
|
|
inline type##Handle::type##Handle (Thread* thread, type##Oop obj) : Handle(thread, (oop)obj) { \
|
|
assert(is_null() || ((oop)obj)->is_a(), "illegal type"); \
|
|
}
|
|
|
|
DEF_HANDLE_CONSTR(instance , is_instance_noinline )
|
|
DEF_HANDLE_CONSTR(array , is_array_noinline )
|
|
DEF_HANDLE_CONSTR(objArray , is_objArray_noinline )
|
|
DEF_HANDLE_CONSTR(typeArray, is_typeArray_noinline)
|
|
|
|
// Constructor for metadata handles
|
|
#define DEF_METADATA_HANDLE_FN(name, type) \
|
|
inline name##Handle::name##Handle(Thread* thread, type* obj) : _value(obj), _thread(thread) { \
|
|
if (obj != nullptr) { \
|
|
assert(((Metadata*)obj)->is_valid(), "obj is valid"); \
|
|
assert(_thread == Thread::current(), "thread must be current"); \
|
|
assert(_thread->is_in_live_stack((address)this), "not on stack?"); \
|
|
_thread->metadata_handles()->push((Metadata*)obj); \
|
|
} \
|
|
} \
|
|
|
|
DEF_METADATA_HANDLE_FN(method, Method)
|
|
DEF_METADATA_HANDLE_FN(constantPool, ConstantPool)
|
|
|
|
inline void HandleMark::push() {
|
|
// This is intentionally a NOP. pop_and_restore will reset
|
|
// values to the HandleMark further down the stack, typically
|
|
// in JavaCalls::call_helper.
|
|
debug_only(_area->_handle_mark_nesting++);
|
|
}
|
|
|
|
inline void HandleMark::pop_and_restore() {
|
|
// Delete later chunks
|
|
if(_chunk->next() != nullptr) {
|
|
assert(_area->size_in_bytes() > size_in_bytes(), "Sanity check");
|
|
chop_later_chunks();
|
|
} else {
|
|
assert(_area->size_in_bytes() == size_in_bytes(), "Sanity check");
|
|
}
|
|
// Roll back arena to saved top markers
|
|
_area->_chunk = _chunk;
|
|
_area->_hwm = _hwm;
|
|
_area->_max = _max;
|
|
debug_only(_area->_handle_mark_nesting--);
|
|
}
|
|
|
|
inline HandleMarkCleaner::HandleMarkCleaner(Thread* thread) {
|
|
_thread = thread;
|
|
_thread->last_handle_mark()->push();
|
|
}
|
|
|
|
inline HandleMarkCleaner::~HandleMarkCleaner() {
|
|
_thread->last_handle_mark()->pop_and_restore();
|
|
}
|
|
|
|
#endif // SHARE_RUNTIME_HANDLES_INLINE_HPP
|