On Fri, 7 Jun 2024 10:40:07 GMT, Thomas Stuefe <stu...@openjdk.org> wrote:
> @dholmes-ora this is one of yours.
>
> This was a tad annoying to fix (fix is simple though), since the jcmd
> framework has no good way to allow for default parameters that are not used
> literally. E.g. in this case, the real value for the file name will contain
> the process pid, which of course cannot be hard-coded.
>
> New output:
>
>
> Syntax : System.dump_map [options]
>
> Options: (options must be specified using the <key> or <key>=<value> syntax)
> -H : [optional] Human readable format (BOOLEAN, false)
> -F : [optional] file path (STRING, vm_memory_map_<pid>.txt)
jcmd.l should also have been fixed. It currently reads:
options:
-H: (Optional) Human readable format (BOOLEAN, false)
-F: (Optional) File path (STRING, "vm_memory_map_.txt")
Note thet `<pid>` is missing. You can use the changes for
[JDK-8323546](https://bugs.openjdk.org/browse/JDK-8323546) as a model on how
to specify and describe the default parameter.
src/hotspot/share/services/diagnosticCommand.cpp line 1211:
> 1209: } else {
> 1210: name = _filename.value();
> 1211: }
This code should be considering if a default it specified or not, in case the
specified value is identical to what is contained in `default_filename`. With
the current solution, if the user literally specifies vm_memory_map_<pid\>.txt,
the <pid> part will be expanded to the actual pid. See how
[JDK-8323546](https://bugs.openjdk.org/browse/JDK-8323546) handled this.
-------------
PR Comment: https://git.openjdk.org/jdk/pull/19596#issuecomment-2158908825
PR Review Comment: https://git.openjdk.org/jdk/pull/19596#discussion_r1633575756
