JDK-8155100 : AArch64: Relax alignment requirement for byte_map_base
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • CPU: aarch64
  • Submitted: 2016-04-26
  • Updated: 2021-02-01
  • Resolved: 2016-04-26
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JDK 9 Other
9 b120Fixed openjdk8u292Fixed
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Description
AArch64 expects the card table base to be page aligned, and asserts that.  Unfortunately (because asserts are compiled out in release code) if this assumption is ever violated in production code we won't see it. Instead, we will see mysterious segfaults.

We have seen this fail in OpenJDK 7.

It makes more sense to allow the base to be unaligned.