[Bug runtime/31060] New: Early uprobe registration and task-finder target executable path resolving should switch mount namespace to the target process's

["agentzh at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=31060

            Bug ID: 31060
           Summary: Early uprobe registration and task-finder target
                    executable path resolving should switch mount
                    namespace to the target process's
           Product: systemtap
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: runtime
          Assignee: systemtap at sourceware dot org
          Reporter: agentzh at gmail dot com
  Target Milestone: ---

When --target-namespace=PID is specified, the early uprobe registration and
target program file path resolving in task finder fail to switch the current
mount namespace to the target program's.

Otherwise we'd see errors like this:

```
ERROR: Couldn't resolve target program file path '/newroot/a.out': -2
```

I'm preparing a patch to address this issue.

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