JDK-8331098 : [Aarch64] Fix crash in Arrays.equals() intrinsic with -CCP
  • Type: Bug
  • Component: hotspot
  • Sub-Component: runtime
  • Affected Version:
    23,24,repo-lilliput-17,repo-lilliput-21,repo-lilliput 23,24,repo-lilliput-17,repo-lilliput-21,repo-lilliput
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • CPU: aarch64
  • Submitted: 2024-04-25
  • Updated: 2024-05-18
  • Resolved: 2024-05-10
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JDK 23
23 b23Fixed
Related Reports
Relates :  
JDK-8139457 - Relax alignment of array elements
Description
The implementations of Arrays.equals() in macroAssembler_aarch64.cpp, MacroAssembler::arrays_equals() assumes that the start of arrays is 8-byte-aligned. Since JDK-8139457 this is no longer the case, at least when running with -CompressedClassPointers (or Lilliput). The effect is that the loops may run over the array end, and if the array is at heap boundary, and that memory is unmapped, then it may crash.
Comments
[~rkennke] - Why did you add '24' to the "Affects Versions" field?
18-05-2024
Changeset: 1dac34fa Author: Roman Kennke <rkennke@openjdk.org> Date: 2024-05-10 21:13:43 +0000 URL: https://git.openjdk.org/jdk/commit/1dac34fa757f1d603f0bc9b9c1994c114c276add
10-05-2024
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/18948 Date: 2024-04-25 10:38:55 +0000
25-04-2024