Does CDS archive generation work for crossbuilds?

[Alan Bateman]

On 23/10/2021 07:57, Thomas Stüfe wrote:
> Hi,
>
> when I crossbuild (for linux aarch64, using a devkit, building on linux
> x64), for some reason I don't
> get the classes.jsa generated inside the images directory.
>
> My configure options:
>
> --with-devkit=/shared/projects/openjdk/devkits/x86_64-linux-gnu-to-aarch64-linux-gnu
> --openjdk-target=aarch64-linux-gnu
> --with-boot-jdk=/shared/projects/openjdk/jdks/sapmachine17
> --with-build-jdk=/shared/projects/openjdk/jdk-jdk/output-release/images/jdk
> --with-gtest=/shared/projects/openjdk/gtest/googletest
> --with-debug-level=fastdebug
>
> The build jdk is a freshly build x64 release VM from the same source tree.
>
> Am I missing something obvious? Is CDS archive generation even supported
> for crossbuilds?
It needs the generate run-time to execute "java -Xshare:dump" so I don't 
expect so. hotspot-runtime-dev is probably the place to discuss the 
details. BTW: this came up recently in the context of the jlink plugin 
that generates the CDS archive. The plugin needed a check to ensure that 
the target platform matched the current platform as it could launch the 
target VM to create the dump.

-Alan