AArch64 OpenJDK bootstrap failure on head

[Ioi Lam]

On 2/1/21 9:36 AM, Thomas Stüfe wrote:
> This does not solve the alignment problem, but I don't like that we 
> unconditionally print a message here since this is a non-fatal error. 
> Also, CDS mapping may fail for other reasons, for which we do not 
> print unconditionally. I think we should make this info log level:
>
> --- a/src/hotspot/share/memory/metaspaceShared.cpp
> +++ b/src/hotspot/share/memory/metaspaceShared.cpp
> @@ -1725,7 +1725,7 @@ MapArchiveResult 
> MetaspaceShared::map_archive(FileMapInfo* mapinfo, char* mapped
>    mapinfo->set_is_mapped(false);
>
>    if (mapinfo->alignment() != (size_t)os::vm_allocation_granularity()) {
> -    log_error(cds)("Unable to map CDS archive -- 
> os::vm_allocation_granularity() expected: " SIZE_FORMAT
> +    log_info(cds)("Unable to map CDS archive -- 
> os::vm_allocation_granularity() expected: " SIZE_FORMAT
>                     " actual: %d", mapinfo->alignment(), 
> os::vm_allocation_granularity());
>      return MAP_ARCHIVE_OTHER_FAILURE;
>    }
>
> @ Ioi, does that make sense?
>

Yes, your fix makes sense.

This issue is being address in 
https://bugs.openjdk.java.net/browse/JDK-8236847. We will probably 
unconditionally change the alignment to 64KB for AARCH64, as well as 
MacOS (so that you can run a X64 JDK on M1 using Rosetta).

Thanks
- Ioi

> Cheers, Thomas
>
>
> On Mon, Feb 1, 2021 at 6:20 PM Andrew Haley <aph at redhat.com 
> <mailto:aph at redhat.com>> wrote:
>
>     On 2/1/21 5:14 PM, Aleksey Shipilev wrote:
>     > On 2/1/21 4:38 PM, Andrew Haley wrote:
>     >> but that doesn't work either. Any ideas? I'm really stuck.
>     >
>     > Did you "make clean" after changing any of the configure files
>     and/or configure arguments? I.e. did
>     > AWTIcon32_java_icon16_png actually regenerate?
>
>     Many times.
>
>     > Prepending the build with "LOG=debug" would tell what cmdlines
>     are used at every step of build process.
>
>     Sure, I can see what it's doing. I think this is actually a regression
>     caused by the Windows-AArch64 port. I'll do some bisecting.
>
>     -- 
>     Andrew Haley  (he/him)
>     Java Platform Lead Engineer
>     Red Hat UK Ltd. <https://www.redhat.com
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>     https://keybase.io/andrewhaley
>     <https://urldefense.com/v3/__https://keybase.io/andrewhaley__;!!GqivPVa7Brio!MzT8lD4heOPkWgVBap3cDC2aM4W8zJ1wWS_-PVlTdPwr96wHRafdO7wP-EZNow$>
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>