-file-list-exec-source-files && libraries

-file-list-exec-source-files && libraries

[Bob Rossi]

Hi,

A user of -file-list-exec-source-files noticed that this command does
not initially list the files that are in a library. For example,

I have
   $ ls
   Makefile  lib.c  lib.h  lib.o  libmilib.a  main  main.c

And
   $ cat Makefile
   all:
      gcc -c -g -Wall lib.c
      ar cru libmilib.a lib.o
      gcc -g -Wall main.c -o main -L. -lmilib -I.

When I do -file-list-exec-source-files originally, it doesn't show
lib.c, after I do 'list lib.c:1' it will then show the filename. Also, I
believe it shows all of the filenames in the library. 

My question is, is there any way to get this funcionality from the get
go? Load the psymtabs for all the libraries?

Or is there a GDB command that forces loading all symbols into the
partial symbol table at start?

Thanks,
Bob Rossi

Re: -file-list-exec-source-files && libraries

[Bob Rossi]

On Fri, Jun 11, 2004 at 02:29:16PM -0400, Bob Rossi wrote:
> Hi,
> 
> A user of -file-list-exec-source-files noticed that this command does
> not initially list the files that are in a library. For example,
> 
> I have
>    $ ls
>    Makefile  lib.c  lib.h  lib.o  libmilib.a  main  main.c
> 
> And
>    $ cat Makefile
>    all:
>       gcc -c -g -Wall lib.c
>       ar cru libmilib.a lib.o
>       gcc -g -Wall main.c -o main -L. -lmilib -I.
> 
> When I do -file-list-exec-source-files originally, it doesn't show
> lib.c, after I do 'list lib.c:1' it will then show the filename. Also, I
> believe it shows all of the filenames in the library. 
> 
> My question is, is there any way to get this funcionality from the get
> go? Load the psymtabs for all the libraries?
> 
> Or is there a GDB command that forces loading all symbols into the
> partial symbol table at start?

Unfortunatly, I forgot to add one thing. The files from all libraries do
show up when the stabs debugging format is used. It seems like this is a
dwarf2 problem. Anyone know if this is a bug?

Or something maybe I could look into?

Thanks,
Bob Rossi

info sources regression with dwarf2/stabs

[Bob Rossi]

On Fri, Jun 11, 2004 at 02:35:10PM -0400, Bob Rossi wrote:
> On Fri, Jun 11, 2004 at 02:29:16PM -0400, Bob Rossi wrote:
> > Hi,
> > 
> > A user of -file-list-exec-source-files noticed that this command does
> > not initially list the files that are in a library. For example,
> > 
> > I have
> >    $ ls
> >    Makefile  lib.c  lib.h  lib.o  libmilib.a  main  main.c
> > 
> > And
> >    $ cat Makefile
> >    all:
> >       gcc -c -g -Wall lib.c
> >       ar cru libmilib.a lib.o
> >       gcc -g -Wall main.c -o main -L. -lmilib -I.
> > 
> > When I do -file-list-exec-source-files originally, it doesn't show
> > lib.c, after I do 'list lib.c:1' it will then show the filename. Also, I
> > believe it shows all of the filenames in the library. 
> > 
> > My question is, is there any way to get this funcionality from the get
> > go? Load the psymtabs for all the libraries?
> > 
> > Or is there a GDB command that forces loading all symbols into the
> > partial symbol table at start?
> 
> Unfortunatly, I forgot to add one thing. The files from all libraries do
> show up when the stabs debugging format is used. It seems like this is a
> dwarf2 problem. Anyone know if this is a bug?
> 
> Or something maybe I could look into?

Finally, this is also a problem with the 'info sources' command. Does
that make the problem a little more interesting to anyone? :)

Bob Rossi

Re: info sources regression with dwarf2/stabs

[Bob Rossi]

On Fri, Jun 11, 2004 at 10:14:45PM -0400, Bob Rossi wrote:
> On Fri, Jun 11, 2004 at 02:35:10PM -0400, Bob Rossi wrote:
> > On Fri, Jun 11, 2004 at 02:29:16PM -0400, Bob Rossi wrote:
> > > Hi,
> > > 
> > > A user of -file-list-exec-source-files noticed that this command does
> > > not initially list the files that are in a library. For example,
> > > 
> > > I have
> > >    $ ls
> > >    Makefile  lib.c  lib.h  lib.o  libmilib.a  main  main.c
> > > 
> > > And
> > >    $ cat Makefile
> > >    all:
> > >       gcc -c -g -Wall lib.c
> > >       ar cru libmilib.a lib.o
> > >       gcc -g -Wall main.c -o main -L. -lmilib -I.
> > > 
> > > When I do -file-list-exec-source-files originally, it doesn't show
> > > lib.c, after I do 'list lib.c:1' it will then show the filename. Also, I
> > > believe it shows all of the filenames in the library. 
> > > 
> > > My question is, is there any way to get this funcionality from the get
> > > go? Load the psymtabs for all the libraries?
> > > 
> > > Or is there a GDB command that forces loading all symbols into the
> > > partial symbol table at start?
> > 
> > Unfortunatly, I forgot to add one thing. The files from all libraries do
> > show up when the stabs debugging format is used. It seems like this is a
> > dwarf2 problem. Anyone know if this is a bug?
> > 
> > Or something maybe I could look into?
> 
> Finally, this is also a problem with the 'info sources' command. Does
> that make the problem a little more interesting to anyone? :)

Ping, any ideas?

Thanks,
Bob Rossi

Re: -file-list-exec-source-files && libraries

[Jim Blandy]

Bob Rossi <bob@brasko.net> writes:

> On Fri, Jun 11, 2004 at 02:29:16PM -0400, Bob Rossi wrote:
> > Hi,
> > 
> > A user of -file-list-exec-source-files noticed that this command does
> > not initially list the files that are in a library. For example,
> > 
> > I have
> >    $ ls
> >    Makefile  lib.c  lib.h  lib.o  libmilib.a  main  main.c
> > 
> > And
> >    $ cat Makefile
> >    all:
> >       gcc -c -g -Wall lib.c
> >       ar cru libmilib.a lib.o
> >       gcc -g -Wall main.c -o main -L. -lmilib -I.
> > 
> > When I do -file-list-exec-source-files originally, it doesn't show
> > lib.c, after I do 'list lib.c:1' it will then show the filename. Also, I
> > believe it shows all of the filenames in the library. 
> > 
> > My question is, is there any way to get this funcionality from the get
> > go? Load the psymtabs for all the libraries?
> > 
> > Or is there a GDB command that forces loading all symbols into the
> > partial symbol table at start?
> 
> Unfortunatly, I forgot to add one thing. The files from all libraries do
> show up when the stabs debugging format is used. It seems like this is a
> dwarf2 problem. Anyone know if this is a bug?
> 
> Or something maybe I could look into?

Hmm.  The partial symbol tables ought to be listing every source file
mentioned in the program.  Otherwise, when a user refers to a source
file by name (say, to set a breakpoint), GDB won't be able to tell
which compilation units' symbols to read in.

Dwarf 2 used to have a problem with this, but the following change
fixed that problem:

2004-05-03  J. Brobecker  <brobecker@gnat.com>

	* dwarf2read.c (line_header): Add new included_p field in
	field file_names.
	(partial_die_info): New field has_stmt_list. New field line_offset.
	(dwarf2_create_include_psymtab): New function.
	(dwarf2_build_include_psymtabs): New function.
	(add_file_name): Add forward declaration. Initialize new field.
	(dwarf_decode_lines): Add new parameter. Enhance this procedure
	to be able to determine the list of files included by the
	given unit, and build their associated psymtabs.
	(dwarf2_build_psymtabs_hard): Build the psymtabs for the included
	files as well.
	(psymtab_to_symtab_1): Build the symtabs of all dependencies as well.
	(read_file_scope): Update call to dwarf_decode_lines.
	(read_partial_die): Handle DW_AT_stmt_list attributes.

So, does 'readelf -wl main' mention all the source files?  It should.

Does 'maint info psymtabs' mention all the source files?  It should,
too.