1 /*
2 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
580 // Go to the next LocalVariableTableElement
581 localVariableTableElement += config.localVariableTableElementSize;
582 }
583
584 return new LocalVariableTableImpl(locals);
585 }
586
587 /**
588 * Returns the offset of this method into the v-table. The method must have a v-table entry as
589 * indicated by {@link #isInVirtualMethodTable(ResolvedJavaType)}, otherwise an exception is
590 * thrown.
591 *
592 * @return the offset of this method into the v-table
593 */
594 public int vtableEntryOffset(ResolvedJavaType resolved) {
595 if (!isInVirtualMethodTable(resolved)) {
596 throw new JVMCIError("%s does not have a vtable entry in type %s", this, resolved);
597 }
598 HotSpotVMConfig config = config();
599 final int vtableIndex = getVtableIndex((HotSpotResolvedObjectTypeImpl) resolved);
600 return config.instanceKlassVtableStartOffset() + vtableIndex * config.vtableEntrySize + config.vtableEntryMethodOffset;
601 }
602
603 @Override
604 public boolean isInVirtualMethodTable(ResolvedJavaType resolved) {
605 if (resolved instanceof HotSpotResolvedObjectTypeImpl) {
606 HotSpotResolvedObjectTypeImpl hotspotResolved = (HotSpotResolvedObjectTypeImpl) resolved;
607 int vtableIndex = getVtableIndex(hotspotResolved);
608 return vtableIndex >= 0 && vtableIndex < hotspotResolved.getVtableLength();
609 }
610 return false;
611 }
612
613 private int getVtableIndex(HotSpotResolvedObjectTypeImpl resolved) {
614 if (!holder.isLinked()) {
615 return config().invalidVtableIndex;
616 }
617 if (holder.isInterface()) {
618 if (resolved.isInterface()) {
619 return config().invalidVtableIndex;
620 }
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1 /*
2 * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
580 // Go to the next LocalVariableTableElement
581 localVariableTableElement += config.localVariableTableElementSize;
582 }
583
584 return new LocalVariableTableImpl(locals);
585 }
586
587 /**
588 * Returns the offset of this method into the v-table. The method must have a v-table entry as
589 * indicated by {@link #isInVirtualMethodTable(ResolvedJavaType)}, otherwise an exception is
590 * thrown.
591 *
592 * @return the offset of this method into the v-table
593 */
594 public int vtableEntryOffset(ResolvedJavaType resolved) {
595 if (!isInVirtualMethodTable(resolved)) {
596 throw new JVMCIError("%s does not have a vtable entry in type %s", this, resolved);
597 }
598 HotSpotVMConfig config = config();
599 final int vtableIndex = getVtableIndex((HotSpotResolvedObjectTypeImpl) resolved);
600 return config.instanceKlassVtableStartOffset + vtableIndex * config.vtableEntrySize + config.vtableEntryMethodOffset;
601 }
602
603 @Override
604 public boolean isInVirtualMethodTable(ResolvedJavaType resolved) {
605 if (resolved instanceof HotSpotResolvedObjectTypeImpl) {
606 HotSpotResolvedObjectTypeImpl hotspotResolved = (HotSpotResolvedObjectTypeImpl) resolved;
607 int vtableIndex = getVtableIndex(hotspotResolved);
608 return vtableIndex >= 0 && vtableIndex < hotspotResolved.getVtableLength();
609 }
610 return false;
611 }
612
613 private int getVtableIndex(HotSpotResolvedObjectTypeImpl resolved) {
614 if (!holder.isLinked()) {
615 return config().invalidVtableIndex;
616 }
617 if (holder.isInterface()) {
618 if (resolved.isInterface()) {
619 return config().invalidVtableIndex;
620 }
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