[jdk11u-dev] RFR: 8253795: Implementation of JEP 391: macOS/AArch64 Port [v7]

[Thomas Stuefe]

On Thu, 27 Jan 2022 20:16:28 GMT, Vladimir Kempik <vkempik at openjdk.org> wrote:

> btw, https://developer.apple.com/documentation/xcode/investigating-memory-access-crashes
> 
> EXC_ARM_DA_ALIGN. The crashed thread tried to access memory that isn’t appropriately aligned. This exception code is rare because 64-bit ARM CPUs work with misaligned data. However, you may see this exception subtype if **the memory address is both misaligned and located in an unmapped memory region**. You may have other crash reports that show a memory access issue with a different exception subtype, which are likely caused by the same underlying memory access issue.

Is this also true for code? I would have thought that instructions have to be loaded from a 64-bit-aligned address?

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PR: https://git.openjdk.java.net/jdk11u-dev/pull/715