RFR: JDK-8320892: AArch64: Restore FPU control state after JNI [v3]

[David Holmes]

On Thu, 30 Nov 2023 09:58:28 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> I was also going to suggest adding a new flag and creating an alias. The new flag will need a CSR request of course.
>
>> I was also going to suggest adding a new flag and creating an alias. The new flag will need a CSR request of course.
> 
> Given that it's new and it's diagnostic flag I'm a bit surprised at that. I was trying for a quick fix.
> 
> Anyway, how do you create an alias? I can't see any examples, and I haven't found a way through the maze of twisty `#define` passages.

@theRealAph  the `RestoreMXCSROnJNICalls` flag is a product flag not diagnostic.

Aliased flags are setup in arguments.cpp by editing this:

static AliasedFlag const aliased_jvm_flags[] = {
  { "DefaultMaxRAMFraction",    "MaxRAMFraction"    },
  { "CreateMinidumpOnCrash",    "CreateCoredumpOnCrash" },
  { nullptr, nullptr}
};

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PR Comment: https://git.openjdk.org/jdk/pull/16851#issuecomment-1837839773