gdb: Add new -n flag to some info commands

The 'info variables', its alias 'whereis', and 'info functions' all
include non-debug symbols in the output by default.  The list of
non-debug symbols can sometimes be quite long, resulting in the
debug symbol based results being scrolled off the screen.

This commit adds a '-n' flag to all of the commands listed above that
excludes the non-debug symbols from the results, leaving just the
debug symbol based results.

gdb/ChangeLog:

	* cli/cli-utils.c (info_print_options_defs): Delete.
	(make_info_print_options_def_group): Delete.
	(extract_info_print_options): Delete.
	(info_print_command_completer): Delete.
	(info_print_args_help): Add extra parameter, and optionally
	include text about -n flag.
	* cli/cli-utils.h (struct info_print_options): Delete.
	(extract_info_print_options): Delete declaration.
	(info_print_command_completer): Delete declaration.
	(info_print_args_help): Add extra parameter, extend header
	comment.
	* python/python.c (gdbpy_rbreak): Pass additional parameter to
	search_symbols.
	* stack.c (struct info_print_options): New type.
	(info_print_options_defs): New file scoped variable.
	(make_info_print_options_def_group): New static function.
	(info_print_command_completer): New static function.
	(info_locals_command): Update to use new local functions.
	(info_args_command): Likewise.
	(_initialize_stack): Add extra parameter to calls to
	info_print_args_help.
	* symtab.c (search_symbols): Add extra parameter, use this to
	possibly excluse non-debug symbols.
	(symtab_symbol_info): Add extra parameter, which is passed on to
	search_symbols.
	(struct info_print_options): New type.
	(info_print_options_defs): New file scoped variable.
	(make_info_print_options_def_group): New static function.
	(info_print_command_completer): New static function.
	(info_variables_command): Update to use local functions, and pass
	extra parameter through to symtab_symbol_info.
	(info_functions_command): Likewise.
	(info_types_command): Pass additional argument through to
	symtab_symbol_info.
	(rbreak_command): Pass extra argument to search_symbols.
	(_initialize_symtab): Add extra arguments for calls to
	info_print_args_help, and update help text for 'info variables',
	'whereis', and 'info functions' commands.
	* symtab.h (search_symbols): Add extra argument to declaration.
	* NEWS: Mention new flags.

gdb/doc/ChangeLog:

	* gdb.texinfo (Symbols): Add information about the -n flag to
	"info variables" and "info functions".

gdb/testsuite/ChangeLog:

	* gdb.base/info-fun.exp: Extend to test the -n flag for 'info
	functions'.  Reindent as needed.
	* gdb.base/info-var-f1.c: New file.
	* gdb.base/info-var-f2.c: New file.
	* gdb.base/info-var.exp: New file.
	* gdb.base/info-var.h: New file.

2 files changed, 16 insertions, 4 deletions

diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 7fa73fb..a532825 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,8 @@
+2019-08-27  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* gdb.texinfo (Symbols): Add information about the -n flag to
+	"info variables" and "info functions".
+
 2019-08-25  Yoshinori Sato <ysato@users.sourceforge.jp>
 
         * gdb.texinfo (Standard Target Features): Add RX Features sub-section.
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index e1bc814..53b7de9 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -18594,7 +18594,7 @@ The matching is case-sensitive, except on operating systems that
 have case-insensitive filesystem (e.g., MS-Windows).
 
 @kindex info functions
-@item info functions [-q]
+@item info functions [-q] [-n]
 Print the names and data types of all defined functions.
 Similarly to @samp{info types}, this command groups its output by source
 files and annotates each function definition with its source line
@@ -18607,11 +18607,16 @@ to print the function name and type according to the
 language of the function, other values mean to use
 the manually specified language (see @ref{Manually, ,Set Language Manually}).
 
+The @samp{-n} flag excludes @dfn{non-debugging symbols} from the
+results.  A non-debugging symbol is a symbol that comes from the
+executable's symbol table, not from the debug information (for
+example, DWARF) associated with the executable.
+
 The optional flag @samp{-q}, which stands for @samp{quiet}, disables
 printing header information and messages explaining why no functions
 have been printed.
 
-@item info functions [-q] [-t @var{type_regexp}] [@var{regexp}]
+@item info functions [-q] [-n] [-t @var{type_regexp}] [@var{regexp}]
 Like @samp{info functions}, but only print the names and data types
 of the functions selected with the provided regexp(s).
 
@@ -18641,7 +18646,7 @@ is printed only if its name matches @var{regexp} and its type matches
 
 
 @kindex info variables
-@item info variables [-q]
+@item info variables [-q] [-n]
 Print the names and data types of all variables that are defined
 outside of functions (i.e.@: excluding local variables).
 The printed variables are grouped by source files and annotated with
@@ -18654,11 +18659,13 @@ to print the variable name and type according to the
 language of the variable, other values mean to use
 the manually specified language (see @ref{Manually, ,Set Language Manually}).
 
+The @samp{-n} flag excludes non-debugging symbols from the results.
+
 The optional flag @samp{-q}, which stands for @samp{quiet}, disables
 printing header information and messages explaining why no variables
 have been printed.
 
-@item info variables [-q] [-t @var{type_regexp}] [@var{regexp}]
+@item info variables [-q] [-n] [-t @var{type_regexp}] [@var{regexp}]
 Like @kbd{info variables}, but only print the variables selected
 with the provided regexp(s).