New `System.map` and `System.dump_map` diagnostic commands have been added to jcmd. When executed, these commands print the virtual memory map of the JVM process, together with Native Memory Tracking information about the virtual memory segments. For the latter information to be displayed, Native Memory Tracking must be enabled.

`jcmd <pid> System.map` will print the virtual memory map of the JVM indicated by `<pid>` to the stdout of `jcmd`.

`jcmd <pid> System.dump_map` will cause the target JVM indicated by `<pid>` to print the virtual memory map to a file named `vm_memory_map_<pid>.txt` into the current directory of the target JVM.