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Re: [RFC] -symbol-info-symbol and -symbol-list-functions
- From: Elena Zannoni <ezannoni at redhat dot com>
- To: Jelmer Vernooij <jelmer at samba dot org>
- Cc: gdb-patches at sources dot redhat dot com
- Date: Wed, 11 Sep 2002 16:43:38 -0400
- Subject: Re: [RFC] -symbol-info-symbol and -symbol-list-functions
- References: <20020911191204.GA24463@vernstok.dyndns.org>
Jelmer Vernooij writes:
> Hi all!
>
> This is my first attempt to implement -symbol-info-symbol and
> -symbol-list-functions.
>
> It's not meant to be committed already, but I'm just wondering whether
> I'm using the correct functions, coding style and output. Should I
> really use search_symbols for these kinds of things? It seems a little
> inefficient to use a function that does regex matching when supplying
> a 'normal' symbol name (and it might have some issues as well with
> names that contain special regex characters).
>
Thanks for your work.
I agree with Keith's comments, his suggestions are good ones.
There is another thing I have noticed. The symbol-info-symbol command
is supposed to take an address as argument and return a symbol that is
located at the given address. Look at the implementation in
printcmd.c:sym_info(), and at the documentation in gdbmi.texinfo. I
think here you are just doing a search within functions only for a
symbol of a given name, if I read your code correctly.
Other than that, you are on the right track. As Keith points out, a
lot of these MI commands were 'inspired' by gdbtk, so it is generally
useful to look at how gdbtk solved the problem and what complications
it ran into.
Elena
> Jelmer
> diff -r -u gdb+dejagnu-20020907/gdb/Makefile.in gdb-jelmer/gdb/Makefile.in
> --- gdb+dejagnu-20020907/gdb/Makefile.in 2002-09-02 20:09:06.000000000 +0200
> +++ gdb-jelmer/gdb/Makefile.in 2002-09-11 20:22:30.000000000 +0200
> @@ -165,12 +165,12 @@
> mi-out.o mi-console.o \
> mi-cmds.o mi-cmd-var.o mi-cmd-break.o mi-cmd-stack.o \
> mi-cmd-disas.o \
> - mi-main.o mi-parse.o mi-getopt.o
> + mi-main.o mi-parse.o mi-getopt.o mi-cmd-symbol.o
> SUBDIR_MI_SRCS = \
> mi/mi-out.c mi/mi-console.c \
> mi/mi-cmds.c \
> mi/mi-cmd-var.c mi/mi-cmd-break.c mi/mi-cmd-stack.c \
> - mi/mi-cmd-disas.c \
> + mi/mi-cmd-disas.c mi/mi-cmd-symbol.c \
> mi/mi-main.c mi/mi-parse.c mi/mi-getopt.c
> SUBDIR_MI_DEPS =
> SUBDIR_MI_INITS = \
> @@ -2411,6 +2411,10 @@
> # Need to explicitly specify the compile rule as make will do nothing
> # or try to compile the object file into the mi directory.
>
> +mi-cmd-symbol.o: $(srcdir)/mi/mi-cmd-symbol.c $(defs_h) $(mi_cmds_h) \
> + $(ui_out_h) $(mi_out_h) $(breakpoint_h) $(gdb_string_h) \
> + $(mi_getopt_h) $(gdb_events_h) $(gdb_h)
> + $(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/mi/mi-cmd-symbol.c
> mi-cmd-break.o: $(srcdir)/mi/mi-cmd-break.c $(defs_h) $(mi_cmds_h) \
> $(ui_out_h) $(mi_out_h) $(breakpoint_h) $(gdb_string_h) \
> $(mi_getopt_h) $(gdb_events_h) $(gdb_h)
> diff -r -u gdb+dejagnu-20020907/gdb/mi/mi-cmds.c gdb-jelmer/gdb/mi/mi-cmds.c
> --- gdb+dejagnu-20020907/gdb/mi/mi-cmds.c 2001-03-06 09:21:45.000000000 +0100
> +++ gdb-jelmer/gdb/mi/mi-cmds.c 2002-09-11 20:46:06.000000000 +0200
> @@ -113,8 +113,8 @@
> {"symbol-info-file", 0, 0},
> {"symbol-info-function", 0, 0},
> {"symbol-info-line", 0, 0},
> - {"symbol-info-symbol", 0, 0},
> - {"symbol-list-functions", 0, 0},
> + {"symbol-info-symbol", 0, 0, mi_cmd_symbol_info_symbol},
> + {"symbol-list-functions", 0, 0, mi_cmd_symbol_list_functions},
> {"symbol-list-types", 0, 0},
> {"symbol-list-variables", 0, 0},
> {"symbol-locate", 0, 0},
> diff -r -u gdb+dejagnu-20020907/gdb/mi/mi-cmds.h gdb-jelmer/gdb/mi/mi-cmds.h
> --- gdb+dejagnu-20020907/gdb/mi/mi-cmds.h 2001-03-06 09:21:45.000000000 +0100
> +++ gdb-jelmer/gdb/mi/mi-cmds.h 2002-09-11 20:45:15.000000000 +0200
> @@ -75,6 +75,8 @@
> extern mi_cmd_args_ftype mi_cmd_exec_until;
> extern mi_cmd_args_ftype mi_cmd_exec_interrupt;
> extern mi_cmd_argv_ftype mi_cmd_gdb_exit;
> +extern mi_cmd_argv_ftype mi_cmd_symbol_info_symbol;
> +extern mi_cmd_argv_ftype mi_cmd_symbol_list_functions;
> extern mi_cmd_argv_ftype mi_cmd_stack_info_depth;
> extern mi_cmd_argv_ftype mi_cmd_stack_list_args;
> extern mi_cmd_argv_ftype mi_cmd_stack_list_frames;
> --- /dev/null 2002-08-29 13:57:56.000000000 +0200
> +++ gdb-jelmer/gdb/mi/mi-cmd-symbol.c 2002-09-11 21:02:02.000000000 +0200
> @@ -0,0 +1,83 @@
> +/* MI Command Set - symbol query commands.
> + Copyright 2000, 2002 Free Software Foundation, Inc.
> + Contributed by Jelmer Vernooij
> +
> + This file is part of GDB.
> +
> + This program is free software; you can redistribute it and/or modify
> + it under the terms of the GNU General Public License as published by
> + the Free Software Foundation; either version 2 of the License, or
> + (at your option) any later version.
> +
> + This program is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + GNU General Public License for more details.
> +
> + You should have received a copy of the GNU General Public License
> + along with this program; if not, write to the Free Software
> + Foundation, Inc., 59 Temple Place - Suite 330,
> + Boston, MA 02111-1307, USA. */
> +
> +#include "defs.h"
> +#include "target.h"
> +#include "frame.h"
> +#include "value.h"
> +#include "mi-cmds.h"
> +#include "ui-out.h"
> +#include "symtab.h"
> +
> +static void
> +print_symbol_search_info (struct symbol_search *matches)
> +{
> + struct symbol_search *p;
> +
> + ui_out_list_begin (uiout, "symbols");
> +
> + for (p = matches; p; p = p->next)
> + {
> + ui_out_list_begin (uiout, "symbol");
> + if (p->msymbol == NULL)
> + {
> + ui_out_field_string (uiout, "file", p->symtab->filename);
> + ui_out_field_int (uiout, "line", p->symbol->line);
> + ui_out_field_string (uiout, "name", p->symbol->ginfo.name);
> + }
> + else
> + {
> + ui_out_field_string (uiout, "name", p->msymbol->ginfo.name);
> + }
> + ui_out_list_end (uiout);
> + }
> +
> + ui_out_list_end (uiout);
> +}
> +
> +enum mi_cmd_result
> +mi_cmd_symbol_info_symbol (char *command, char **argv, int argc)
> +{
> + struct symbol_search *matches;
> + if (argc != 1)
> + error ("mi_cmd_symbol_info_line: Usage: SYMBOL");
> +
> + search_symbols (argv[0], FUNCTIONS_NAMESPACE, 0, NULL, &matches);
> +
> + print_symbol_search_info (matches);
> +
> + return MI_CMD_DONE;
> +}
> +
> +
> +enum mi_cmd_result
> +mi_cmd_symbol_list_functions (char *command, char **argv, int argc)
> +{
> + struct symbol_search *matches;
> + if (argc != 0)
> + error ("mi_cmd_symbol_list_functions doesn't require any arguments");
> +
> + search_symbols (NULL, FUNCTIONS_NAMESPACE, 0, NULL, &matches);
> +
> + print_symbol_search_info (matches);
> +
> + return MI_CMD_DONE;
> +}