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 */
23 package jdk.vm.ci.meta;
24
25 import java.util.ArrayList;
26 import java.util.List;
27
28 public class LocalVariableTable {
29
30 private final Local[] locals;
31
32 public LocalVariableTable(Local[] locals) {
33 this.locals = locals;
34 }
35
36 public Local getLocal(int slot, int bci) {
37 Local result = null;
38 for (Local local : locals) {
39 if (local.getSlot() == slot && local.getStartBCI() <= bci && local.getEndBCI() >= bci) {
40 if (result == null) {
41 result = local;
42 } else {
43 throw new IllegalStateException("Locals overlap!");
44 }
45 }
46 }
47 return result;
48 }
49
50 public Local[] getLocals() {
51 return locals;
52 }
53
54 public Local[] getLocalsAt(int bci) {
55 List<Local> result = new ArrayList<>();
56 for (Local l : locals) {
57 if (l.getStartBCI() <= bci && bci <= l.getEndBCI()) {
58 result.add(l);
59 }
60 }
61 return result.toArray(new Local[result.size()]);
62 }
63 }
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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 */
23 package jdk.vm.ci.meta;
24
25 import java.util.ArrayList;
26 import java.util.List;
27
28 /**
29 * @see "https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.13"
30 */
31 public class LocalVariableTable {
32
33 private final Local[] locals;
34
35 /**
36 *
37 * @param locals array of objects describing local variables. This array is now owned by this
38 * object and must not be mutated by the caller.
39 */
40 @SuppressFBWarnings(value = "EI_EXPOSE_REP2", justification = "caller transfers ownership of `locals`")
41 public LocalVariableTable(Local[] locals) {
42 this.locals = locals;
43 }
44
45 public Local getLocal(int slot, int bci) {
46 Local result = null;
47 for (Local local : locals) {
48 if (local.getSlot() == slot && local.getStartBCI() <= bci && local.getEndBCI() >= bci) {
49 if (result == null) {
50 result = local;
51 } else {
52 throw new IllegalStateException("Locals overlap!");
53 }
54 }
55 }
56 return result;
57 }
58
59 public Local[] getLocalsAt(int bci) {
60 List<Local> result = new ArrayList<>();
61 for (Local l : locals) {
62 if (l.getStartBCI() <= bci && bci <= l.getEndBCI()) {
63 result.add(l);
64 }
65 }
66 return result.toArray(new Local[result.size()]);
67 }
68 }
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