src/hotspot/share/gc/shared/continuationGCSupport.inline.hpp - master - githubmirror/panama-vector

src/hotspot/share/gc/shared/continuationGCSupport.inline.hpp

60 строк2 KB

Albert Mingkun Yang

8383564: Avoid reloading klass when transforming stack chunks

30 апр 2026, 12:39

30 апр 2026, 12:39fbb50f5

/*
 * Copyright (c) 2022, 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_GC_SHARED_CONTINUATIONGCSUPPORT_INLINE_HPP
#define SHARE_GC_SHARED_CONTINUATIONGCSUPPORT_INLINE_HPP

#include "gc/shared/continuationGCSupport.hpp"

#include "oops/instanceStackChunkKlass.hpp"
#include "oops/oop.inline.hpp"
#include "oops/stackChunkOop.inline.hpp"

inline bool ContinuationGCSupport::relativize_stack_chunk(oop obj) {
  if (!obj->is_stackChunk()) {
    return false;
  }

  stackChunkOop chunk = stackChunkOopDesc::cast(obj);
  chunk->relativize_derived_pointers_concurrently();

  return true;
}

inline void ContinuationGCSupport::transform_stack_chunk(oop obj) {
  transform_stack_chunk(obj, obj->klass());
}

inline void ContinuationGCSupport::transform_stack_chunk(oop obj, Klass* klass) {
  if (!klass->is_stack_chunk_instance_klass()) {
    return;
  }

  stackChunkOop chunk = stackChunkOopDesc::cast(obj);
  if (!chunk->is_gc_mode()) {
    chunk->transform();
  }
}

#endif // SHARE_GC_SHARED_CONTINUATIONGCSUPPORT_INLINE_HPP