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  1. JDK
  2. JDK-8218966

AArch64: String.compareTo() can read memory after string

    Details

    • Subcomponent:
    • Introduced In Version:
      11
    • Resolved In Build:
      b22
    • CPU:
      aarch64
    • OS:
      linux

      Backports

        Description

        There is a bug in stub code of AArch64 String.compareTo() intrinsics. It can be reproduced by below Java code and VM options.

        public class Test {
          public static void main(String[] args) {
            String str1 = "/home/pengfei/backup/Android/projects/ActionBarSherlock/tree/master/actionbarsherlock/res/";
            String str2 = "/home/pengfei/backup/Android/projects/ActionBarSherlock/tree/master/actionbarsherlock/res/\u6d4b\u8bd5.png";
            System.out.println(str1.compareTo(str2));
          }
        }

        // $ java -Xint Test
        // -6
        // $ java -Xcomp -XX:-TieredCompilation -XX:-Inline Test
        // -27979

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                • Assignee:
                  dpochepk Dmitrij Pochepko
                  Reporter:
                  pli Pengfei Li
                • Votes:
                  1 Vote for this issue
                  Watchers:
                  4 Start watching this issue

                  Dates

                  • Created:
                    Updated:
                    Resolved: