RFR: 8328306: AArch64: MacOS lazy JIT "write xor execute" switching [v3]

[Andrew Haley]

On Sat, 16 Aug 2025 06:25:43 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> Only the hotspot code should write into the code cache, right? A more secure alternative would be then to use `os::address_is_in_vm()`. That compares against the text segment of the libjvm. Prevents accidental misdiagnosis of writes from anywhere (including possibly deliberate ones).

True, but is `dladdr(3)` safe to call from a sighandler on BSD? I don't know, but I wouldn't have thought so.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26562#discussion_r2282795996