Re: [RFA] [patch] 'info symbol' to print more info

[Michael Snyder <msnyder at vmware dot com>]

Paul Pluzhnikov wrote:
> Greetings,
>
> Currently, 'info symbol' and 'maintenance translate-address' print
> just the symbol+offset:
>
> (gdb) maint translate-address 0x2aaaac1f5880
> exit+0
> (gdb) info symbol 0x2aaaac1f5880
> exit in section .text
>
> That's nice, but when I have 100s of shared libraries loaded,
> I want to know more.
>
> Attached patch results in:
>
> (gdb) maint translate-address 0x2aaaac1f5880
> exit+0 section .text in /usr/lib64/libc.so.6
> (gdb) info symbol 0x2aaaac1f5880
> exit in section .text of /usr/lib64/libc.so.6
>
> Regtested on x86_64 with no failures.
>
> Ok to commit?

I like it!

Just one suggestion (and suggestion only) -- since the exec_file
is sort of the default/common case, do you think it would be a
good idea to check if it's the exec_file, and omit the objfile
information if so?


> 2008-11-14  Paul Pluzhnikov  <ppluzhnikov@google.com>
>
> 	* printcmd.c (sym_info): Print object name.
> 	* maint.c (maintenance_translate_address): Likewise.
>
> Index: gdb/maint.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/maint.c,v
> retrieving revision 1.68
> diff -u -p -u -r1.68 maint.c
> --- gdb/maint.c	30 Oct 2008 20:35:30 -0000	1.68
> +++ gdb/maint.c	14 Nov 2008 20:39:48 -0000
> @@ -484,9 +484,18 @@ maintenance_translate_address (char *arg
>      sym = lookup_minimal_symbol_by_pc (address);
>  
>    if (sym)
> -    printf_filtered ("%s+%s\n",
> -		     SYMBOL_PRINT_NAME (sym),
> -		     pulongest (address - SYMBOL_VALUE_ADDRESS (sym)));
> +    {
> +      printf_filtered ("%s+%s",
> +		       SYMBOL_PRINT_NAME (sym),
> +		       pulongest (address - SYMBOL_VALUE_ADDRESS (sym)));
> +      if ((sect = SYMBOL_OBJ_SECTION(sym)))
> +	{
> +	  printf_filtered (_(" section %s"), sect->the_bfd_section->name);
> +	  if (sect->objfile && sect->objfile->name)
> +	    printf_filtered (_(" in %s"), sect->objfile->name);
> +	}
> +      printf_filtered (_("\n"));
> +    }
>    else if (sect)
>      printf_filtered (_("no symbol at %s:0x%s\n"),
>  		     sect->the_bfd_section->name, paddr (address));
> Index: gdb/printcmd.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/printcmd.c,v
> retrieving revision 1.136
> diff -u -p -u -r1.136 printcmd.c
> --- gdb/printcmd.c	13 Nov 2008 22:26:15 -0000	1.136
> +++ gdb/printcmd.c	14 Nov 2008 20:39:48 -0000
> @@ -1026,6 +1026,8 @@ sym_info (char *arg, int from_tty)
>  	  printf_filtered (_("%s overlay "),
>  			   section_is_mapped (osect) ? "mapped" : "unmapped");
>  	printf_filtered (_("section %s"), osect->the_bfd_section->name);
> +	if (osect->objfile && osect->objfile->name)
> +	  printf_filtered (_(" of %s"), osect->objfile->name);
>  	printf_filtered ("\n");
>        }
>    }