Hi Alan, On Sat, Oct 23, 2021 at 9:58 AM Alan Bateman <alan.bate...@oracle.com> wrote:
> > > 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. > > Thinking for a second, probably it cannot work since we copy binary structures verbatim to the archive; I guess the chance that they are binary compatible between platforms is very small. But it should be easily rectified by calling Xshare:dump on the target platform. Thank you! ..Thomas > -Alan >
