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 */
23 package jdk.vm.ci.meta;
24
25 public class LineNumberTable {
26
27 private final int[] lineNumbers;
28 private final int[] bci;
29
30 public LineNumberTable(int[] lineNumbers, int[] bci) {
31 this.lineNumbers = lineNumbers;
32 this.bci = bci;
33 }
34
35 public int[] getLineNumberEntries() {
36 return lineNumbers;
37 }
38
39 public int[] getBciEntries() {
40 return bci;
41 }
42
43 public int getLineNumber(int atBci) {
44 for (int i = 0; i < this.bci.length - 1; i++) {
45 if (this.bci[i] <= atBci && atBci < this.bci[i + 1]) {
46 return lineNumbers[i];
47 }
48 }
49 return lineNumbers[lineNumbers.length - 1];
50 }
51 }
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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 */
23 package jdk.vm.ci.meta;
24
25 /**
26 * Maps bytecode indexes to source line numbers.
27 *
28 * @see "https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.12"
29 */
30 public class LineNumberTable {
31
32 private final int[] lineNumbers;
33 private final int[] bci;
34
35 /**
36 *
37 * @param lineNumbers an array or source line numbers. This array is now owned by this object
38 * and should not be mutated by the caller.
39 * @param bci an array of bytecode indexes the same length at {@code lineNumbers} whose entries
40 * are sorted in ascending order. This array is now owned by this object and must not
41 * be mutated by the caller.
42 */
43 @SuppressFBWarnings(value = "EI_EXPOSE_REP2", justification = "caller transfers ownership of `lineNumbers` and `bcis`")
44 public LineNumberTable(int[] lineNumbers, int[] bci) {
45 assert bci.length == lineNumbers.length;
46 this.lineNumbers = lineNumbers;
47 this.bci = bci;
48 }
49
50 /**
51 * Gets a source line number for {@code atBci}.
52 */
53 public int getLineNumber(int atBci) {
54 for (int i = 0; i < this.bci.length - 1; i++) {
55 if (this.bci[i] <= atBci && atBci < this.bci[i + 1]) {
56 return lineNumbers[i];
57 }
58 }
59 return lineNumbers[lineNumbers.length - 1];
60 }
61 }
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