Re: [Qemu-devel] [PATCH] .gdbinit: load QEMU sub-commands when gdb starts

[Markus Armbruster]

Stefan Hajnoczi <address@hidden> writes:

> On Mon, May 15, 2017 at 03:17:28PM +0100, Alex Bennée wrote:
>> 
>> Stefan Hajnoczi <address@hidden> writes:
>> 
>> > The scripts/qemu-gdb.py file is not easily discoverable.  Add a .gdbinit
>> > file so GDB either loads qemu-gdb.py automatically or prints a message
>> > informing the user how to enable them (some systems disable ./.gdbinit
>> > loading for security reasons).
>> >
>> > Suggested-by: Eric Blake <address@hidden>
>> > Signed-off-by: Stefan Hajnoczi <address@hidden>
>> > ---
>> >  .gdbinit | 8 ++++++++
>> >  1 file changed, 8 insertions(+)
>> >  create mode 100644 .gdbinit
>> >
>> > diff --git a/.gdbinit b/.gdbinit
>> > new file mode 100644
>> > index 0000000..9d322fc
>> > --- /dev/null
>> > +++ b/.gdbinit
>> > @@ -0,0 +1,8 @@
>> > +# GDB may have ./.gdbinit loading disabled by default.  In that case you 
>> > can
>> > +# follow the instructions it prints.  They boil down to adding the 
>> > following to
>> > +# your home directory's ~/.gdbinit file:
>> > +#
>> > +#   add-auto-load-safe-path /path/to/qemu/.gdbinit
>> > +
>> > +# Load QEMU-specific sub-commands and settings
>> > +source scripts/qemu-gdb.py
>> 
>> While this works well enough you might as well just comment the helper
>> script itself.
>
> People don't know scripts/qemu-gdb.py exists so adding a comment there
> doesn't help.
>
>> Would this script take precedence over a users ~/.gdbinit?
>
> All gdbinit files are loaded.  The order in which they are loaded is:
>
> 1. System-wide
> 2. Home directory
> 3. Current directory
>
> https://sourceware.org/gdb/onlinedocs/gdb/Startup.html#Startup
>
>> How would it work for out-of-tree builds?
>
> ./.gdbinit assumes your current working directory is the root of the
> QEMU source tree.  If gdb is launched outside this directory then
> nothing will happen (e.g. from arm-softmmu/ or from an out-of-tree
> build).
>
> I'm not sure if there is a simple way of making ./.gdbinit work from
> out-of-tree build directories.

Worth a try: ln -s $(SRC_PATH)/.gdbinit

If it works, we could have make create the link automatically.

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