Hi Noel, Great I'll try to do it...
I found the configuration file: libreoffice/officecfg/registry/schema/org/openoffice/Office/Java.xcs But I can't find the model to modify (ie: the xcu file). And I think I found where the JVM is loaded: /home/prrvchr/github/libreoffice/libreoffice/stoc/source/javaloader/javaloader.cxx However I don't really understand what is done. I see that the configuration is read (ie: line 315) but I don't see where it is applied... We also have to add a Java Jar archive in the folder: program/classes I suppose. Do you have a preference for the name of the archive and the name of the Java package? Thank you for your help. Pierre. Le lun. 3 févr. 2025 à 06:55, Noel Grandin <noelgran...@gmail.com> a écrit : > Sounds quite reasonable to add this to the core product behind an option. > > On Sat, 01 Feb 2025 at 21:18, Pierre Vacher <prrv...@gmail.com> wrote: > >> Hi all, >> >> I would like to add the Java Instrumentation >> <https://docs.oracle.com/javase/8/docs/api/java/lang/instrument/Instrumentation.html> >> API to the extensions running under LibreOffice and written in Java. >> >> After some testing, I manage to load the Instrumentation >> <https://docs.oracle.com/javase/8/docs/api/java/lang/instrument/Instrumentation.html> >> agent at JVM startup, having taken care to add the necessary startup option >> (ie: >> -javaagent:/home/prrvchr/github/jdbcDriverOOo/source/UnoAgent/dist/UnoAgent.jar) >> and put this archive in the classpath (ie: Tools -> Options -> LibreOffice >> -> Advanced -> Java Options). >> >> UnoAgent.jar is an archive containing only one class which itself >> contains only two methods and this gives access to code injection and the >> possibility of modifying the search path of the system bootloader. This >> currently allows me to be able to deploy an SPI service type like >> System.LoggerFinder, and to be able to be the provider for the >> System.Logger >> <https://docs.oracle.com/en/java/javase/19/docs/api/java.base/java/lang/System.Logger.html> >> interface for all running applications on the JVM. >> >> If we want to make this feature accessible to any extension written in >> Java, it is necessary to make three modifications: - Add the UnoAgent.jar >> archive to the SDK. - Add an entry in the LibreOffice configuration (ie: >> xcu file) to enable or disable instrumentation. - Load the JVM with the >> parameters needed for instrumentation depending on the configuration. >> >> Please let me know what you think about this. >> >> Pierre >> >>
