On Wed, 5 Apr 2023 20:40:32 GMT, Roger Riggs <[email protected]> wrote:
>> src/java.base/share/classes/jdk/internal/foreign/CABI.java line 48:
>>
>>> 46: // might be running in a 32-bit VM on a 64-bit platform.
>>> 47: // addressSize will be correctly 32
>>> 48: if (Architecture.isX64() && ADDRESS_SIZE == 64) {
>>
>> Is there a difference to Architecture.is64bit (I.e. is the later or the
>> former runtime vs compiletime
>
> There should be no difference; I was hesitant to drop the ADDRESS_SIZE check
> without knowing more about the foreign api dependencies. ADDRESS_SIZE is
> computed (I think) from `UNSAFE.ADDRESS_SIZE * 8`.
> But I can't think of how it can be different than the CPU_BITS that are
> defined when the JDK is built.
> Is there a difference to Architecture.is64bit (I.e. is the later or the
> former runtime vs compiletime
Theoretically, the two can be unrelated. Linux x32 ABI is a typical example of
using 32-bit addresses on the x86-64 architecture.
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PR Review Comment: https://git.openjdk.org/jdk/pull/13357#discussion_r1159032441
