jdk/src/hotspot/share/oops/fieldStreams.inline.hpp
Radim Vansa e18277b470 8352075: Perf regression accessing fields
Reviewed-by: coleenp, iklam, jsjolen
2025-06-12 12:29:15 +00:00

81 lines
2.8 KiB
C++

/*
* Copyright (c) 2019, 2025, 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
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*/
#ifndef SHARE_OOPS_FIELDSTREAMS_INLINE_HPP
#define SHARE_OOPS_FIELDSTREAMS_INLINE_HPP
#include "oops/fieldStreams.hpp"
#include "oops/fieldInfo.hpp"
#include "runtime/javaThread.hpp"
FieldStreamBase::FieldStreamBase(const Array<u1>* fieldinfo_stream, ConstantPool* constants, int start, int limit) :
_fieldinfo_stream(fieldinfo_stream),
_reader(FieldInfoReader(_fieldinfo_stream)),
_constants(constantPoolHandle(Thread::current(), constants)),
_index(start),
_limit(limit) {
initialize();
}
FieldStreamBase::FieldStreamBase(const Array<u1>* fieldinfo_stream, ConstantPool* constants) :
_fieldinfo_stream(fieldinfo_stream),
_reader(FieldInfoReader(_fieldinfo_stream)),
_constants(constantPoolHandle(Thread::current(), constants)),
_index(0),
_limit(-1) {
initialize();
}
FieldStreamBase::FieldStreamBase(InstanceKlass* klass) :
_fieldinfo_stream(klass->fieldinfo_stream()),
_reader(FieldInfoReader(_fieldinfo_stream)),
_constants(constantPoolHandle(Thread::current(), klass->constants())),
_index(0),
_limit(-1) {
assert(klass == field_holder(), "");
initialize();
}
inline bool JavaFieldStream::lookup(const Symbol* name, const Symbol* signature) {
if (_search_table != nullptr) {
int index = _reader.search_table_lookup(_search_table, name, signature, _constants(), _limit);
if (index >= 0) {
assert(index < _limit, "must be");
_index = index;
_reader.read_field_info(_fi_buf);
return true;
}
} else {
for (; !done(); next()) {
if (this->name() == name && this->signature() == signature) {
return true;
}
}
}
return false;
}
#endif // SHARE_OOPS_FIELDSTREAMS_INLINE_HPP