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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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 * 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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package jdk.vm.ci.code.site;

import java.util.Objects;

Associates arbitrary information with a position in machine code. For example, HotSpot specific code in a compiler backend may use this to denote the position of a safepoint, exception handler entry point, verified entry point etc.
/** * Associates arbitrary information with a position in machine code. For example, HotSpot specific * code in a compiler backend may use this to denote the position of a safepoint, exception handler * entry point, verified entry point etc. */
public final class Mark extends Site {
An object denoting extra semantic information about the machine code position of this mark.
/** * An object denoting extra semantic information about the machine code position of this mark. */
public final Object id;
Creates a mark that associates id with the machine code position pcOffset.
Params:
  • pcOffset –
  • id –
/** * Creates a mark that associates {@code id} with the machine code position {@code pcOffset}. * * @param pcOffset * @param id */
public Mark(int pcOffset, Object id) { super(pcOffset); this.id = id; } @Override public String toString() { if (id == null) { return String.format("%d[<mark>]", pcOffset); } else if (id instanceof Integer) { return String.format("%d[<mark with id %s>]", pcOffset, Integer.toHexString((Integer) id)); } else { return String.format("%d[<mark with id %s>]", pcOffset, id.toString()); } } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj instanceof Mark) { Mark that = (Mark) obj; if (this.pcOffset == that.pcOffset && Objects.equals(this.id, that.id)) { return true; } } return false; } }