mirror of
https://github.com/openjdk/jdk.git
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99 lines
3.9 KiB
C++
99 lines
3.9 KiB
C++
/*
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* Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "cds/archiveBuilder.hpp"
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#include "cppstdlib/type_traits.hpp"
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#include "oops/instanceKlass.hpp"
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#include "oops/instanceOop.hpp"
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#include "oops/resolvedFieldEntry.hpp"
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#include "runtime/fieldDescriptor.inline.hpp"
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#include "utilities/checkedCast.hpp"
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#include "utilities/globalDefinitions.hpp"
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static_assert(std::is_trivially_copyable_v<ResolvedFieldEntry>);
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// Detect inadvertently introduced trailing padding.
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class ResolvedFieldEntryWithExtra : public ResolvedFieldEntry {
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u1 _extra_field;
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};
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static_assert(sizeof(ResolvedFieldEntryWithExtra) > sizeof(ResolvedFieldEntry));
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void ResolvedFieldEntry::fill_in(const fieldDescriptor& info, u1 tos_state, u1 get_code, u1 put_code) {
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set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
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_field_holder = info.field_holder();
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_field_offset = info.offset();
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_field_index = checked_cast<u2>(info.index());
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_tos_state = tos_state;
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// These must be set after the other fields
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set_bytecode(&_get_code, get_code);
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set_bytecode(&_put_code, put_code);
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assert_is_valid();
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}
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void ResolvedFieldEntry::print_on(outputStream* st) const {
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st->print_cr("Field Entry:");
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if (field_holder() != nullptr) {
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st->print_cr(" - Holder: " INTPTR_FORMAT " %s", p2i(field_holder()), field_holder()->external_name());
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} else {
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st->print_cr("- Holder: null");
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}
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st->print_cr(" - Offset: %d", field_offset());
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st->print_cr(" - Field Index: %d", field_index());
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st->print_cr(" - CP Index: %d", constant_pool_index());
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st->print_cr(" - TOS: %s", type2name(as_BasicType((TosState)tos_state())));
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st->print_cr(" - Is Final: %d", is_final());
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st->print_cr(" - Is Volatile: %d", is_volatile());
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st->print_cr(" - Get Bytecode: %s", Bytecodes::name((Bytecodes::Code)get_code()));
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st->print_cr(" - Put Bytecode: %s", Bytecodes::name((Bytecodes::Code)put_code()));
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}
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#ifdef ASSERT
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void ResolvedFieldEntry::assert_is_valid() const {
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assert(field_holder()->is_instance_klass(), "should be instanceKlass");
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assert(field_offset() >= instanceOopDesc::base_offset_in_bytes(),
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"field offset out of range %d >= %d", field_offset(), instanceOopDesc::base_offset_in_bytes());
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assert(as_BasicType((TosState)tos_state()) != T_ILLEGAL, "tos_state is ILLEGAL");
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assert(_flags < (1 << (max_flag_shift + 1)), "flags are too large %d", _flags);
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// Read each bytecode once.
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volatile Bytecodes::Code g = (Bytecodes::Code)get_code();
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assert(g == 0 || g == Bytecodes::_getstatic || g == Bytecodes::_getfield, "invalid get bytecode %d", g);
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volatile Bytecodes::Code p = (Bytecodes::Code)put_code();
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assert(p == 0 || p == Bytecodes::_putstatic || p == Bytecodes::_putfield, "invalid put bytecode %d", p);
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}
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#endif
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#if INCLUDE_CDS
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void ResolvedFieldEntry::remove_unshareable_info() {
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*this = ResolvedFieldEntry(_cpool_index);
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}
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void ResolvedFieldEntry::mark_and_relocate() {
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ArchiveBuilder::current()->mark_and_relocate_to_buffered_addr(&_field_holder);
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}
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#endif
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