[Bug breakpoints/19474] "break LINE_NUM" set breakpoint on file other than current source file

["palves at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19474

Pedro Alves <palves at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |palves at redhat dot com

--- Comment #4 from Pedro Alves <palves at redhat dot com> ---
> 3. "-source f.c -line 12", as gdb doc "explicit location" says, "The value
> specifies the source file name. To differentiate between files with the same
> base name, prepend as many directories as is necessary to uniquely identify
> the desired file, e.g., foo/bar/baz.c. Otherwise gdb will use the first file
> it finds with the given base name.", so GDB should set one breakpoint
> location,
> 
> (gdb) break -source f.c -line 12
> Breakpoint 7 at 0x4006b8: -source f.c -line 12. (2 locations)
> (gdb) info breakpoints 
> Num     Type           Disp Enb Address            What
> 7       breakpoint     keep y   <MULTIPLE>         
> 7.1                         y     0x00000000004006b8 in bar_in_main at f.c:12
> 7.2                         y     0x00007ffff7bd869f in bar_in_solib at
> f.c:12
> 
> GDB is incorrect.

I'd say this one is correct.

Both files are named "f.c", so the -source specified failed to "prepend as many
directories as is necessary to uniquely identify the desired file".

I wouldn't say that "Otherwise gdb will use the first file it finds with the
given base name." is desirable, as it's brittle, depends on which symtab gdb
happens to expand first.  I think in that case, it's the docs that should be
updated.

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