> Hi, Please review > > Added jcmd option for dumping CDS archive during application runtime. > Before this change, user has to dump shared archive in two steps: first run > application with > `java -XX:DumpLoadedClassList=<classlist> .... ` > to collect shareable class names and saved in file `<classlist>` , then > `java -Xshare:dump -XX:SharedClassListFile=<classlist> > -XX:SharedArchiveFile=<archivefile> ...` > With this change, user can use jcmd to dump CDS without going through above > steps. Also user can choose a moment during the app runtime to dump an > archive. > The bug is associated with the CSR: > https://bugs.openjdk.java.net/browse/JDK-8259798 which has been approved. > New added jcmd option: > `jcmd <pid or AppName> VM.cds static_dump <filename>` > or > `jcmd <pid or AppName> VM.cds dynamic_dump <filename>` > To dump dynamic archive, requires start app with newly added flag > `-XX:+RecordDynamicDumpInfo`, with this flag, some information related to > dynamic dump like loader constraints will be recorded. Note the dumping > process changed some object memory locations so for dumping dynamic archive, > can only done once for a running app. For static dump, user can dump multiple > times against same process. > The file name is optional, if the file name is not supplied, the file name > will take format of `java_pid<number>_static.jsa` or > `java_pid<number>_dynamic.jsa` for static and dynamic respectively. The > `<number>` is the application process ID. > > Tests: tier1,tier2,tier3,tier4 > > Thanks > Yumin
Yumin Qi has updated the pull request incrementally with one additional commit since the last revision: Fix white space in CDS.java ------------- Changes: - all: https://git.openjdk.java.net/jdk/pull/2737/files - new: https://git.openjdk.java.net/jdk/pull/2737/files/d486c06e..bfa71577 Webrevs: - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2737&range=02 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2737&range=01-02 Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod Patch: https://git.openjdk.java.net/jdk/pull/2737.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/2737/head:pull/2737 PR: https://git.openjdk.java.net/jdk/pull/2737
