[Bug gdb/16909] New: GDB `add-inferior` causes segfaults on OSX

[Bug gdb/16909] New: GDB `add-inferior` causes segfaults on OSX

[evan.sultanik at digitaloperatives dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=16909

            Bug ID: 16909
           Summary: GDB `add-inferior` causes segfaults on OSX
           Product: gdb
           Version: 7.7
            Status: NEW
          Severity: critical
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: evan.sultanik at digitaloperatives dot com

$ gdb -ex 'add-inferior -exec pwd' -ex 'inferior 2' -ex 'run'

and

$ gdb -ex 'add-inferior -copies 2 -exec pwd' -ex 'inferior 2' -ex 'run'

both segfault on the `run` command.  In both cases it appears as if it is due
to a null pointer dereference, however, the stack traces for both versions are
slightly different.  I assume that the underlying cause is that multiple
inferiors are not supported in that environment, but GDB should die more
gracefully if that is the case.

I have reproduced this on GDB 7.6 and 7.6.2, both configured as
"x86_64-apple-darwin13.0.0", and also GDB 7.7 configured as
"x86_64-apple-darwin13.1.0”.

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From: "evan.sultanik at digitaloperatives dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/16909] GDB `add-inferior` causes segfaults on OSX
Date: Tue, 06 May 2014 01:13:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id\x16909

--- Comment #1 from Evan Sultanik <evan.sultanik at digitaloperatives dot com> ---
I forgot to mention: The segfaults occur regardless of the executable passed to
`add-inferior`; I just chose `pwd` for example.

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