Add [-q] [-t TYPEREGEXP] [NAMEREGEXP] args to info [args|functions|locals|variables]

Add [-q] [-t TYPEREGEXP] [NAMEREGEXP] args to info [args|functions|locals|variables]

Main changes are:
* stack.c: Add two regexp preg and treg to print_variable_and_value_data
  and used them inside do_print_variable_and_value to filter the
  variables to print.

* symtab.h: Add a new function bool treg_matches_sym_type_name, that
  factorises type matching logic.

* symtab.c: Add type/name matching logic to 'info functions|variables'.

* stack.c : Add type/name matching logic to 'info args|locals'.

gdb/ChangeLog
2018-10-27  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

	* stack.c (print_variable_and_value_data): Add preg and treg.
	(print_frame_local_vars): Add quiet, regexp and t_regexp arguments,
	and update callers.
	(print_frame_arg_vars): Likewise.
	(prepare_reg): New function.
	(info_locals_command): Extract info print args and use them.
	(info_args_command): Likewise.
	(_initialize_stack): Modify on-line help.
	* symtab.c (treg_matches_sym_type_name): New function.
	(search_symbols): New arg t_regexp.
	(symtab_symbol_info): New args quiet, regexp, t_regexp.
	(info_variables_command): Extract info print args and use them.
	(info_functions_command): Likewise.
	(info_types_command): Update call to symtab_symbol_info.
	(_initialize_symtab): Modify on-line help.
	* symtab.h (treg_matches_sym_type_name): New function.
	(search_symbols): New t_regexp arg.

gdb/ChangeLog

@@ -1,3 +1,23 @@
+2018-10-27  Philippe Waroquiers  <philippe.waroquiers@skynet.be>
+
+	* stack.c (print_variable_and_value_data): Add preg and treg.
+	(print_frame_local_vars): Add quiet, regexp and t_regexp arguments,
+	and update callers.
+	(print_frame_arg_vars): Likewise.
+	(prepare_reg): New function.
+	(info_locals_command): Extract info print args and use them.
+	(info_args_command): Likewise.
+	(_initialize_stack): Modify on-line help.
+	* symtab.c (treg_matches_sym_type_name): New function.
+	(search_symbols): New arg t_regexp.
+	(symtab_symbol_info): New args quiet, regexp, t_regexp.
+	(info_variables_command): Extract info print args and use them.
+	(info_functions_command): Likewise.
+	(info_types_command): Update call to symtab_symbol_info.
+	(_initialize_symtab): Modify on-line help.
+	* symtab.h (treg_matches_sym_type_name): New function.
+	(search_symbols): New t_regexp arg.
+
 2018-10-27  Philippe Waroquiers  <philippe.waroquiers@skynet.be>
 
 	* cli-utils.c (extract_arg_maybe_quoted): New function.

gdb/python/python.c

@@ -743,11 +743,11 @@ gdbpy_rbreak (PyObject *self, PyObject *args, PyObject *kw)
     {
       const char **files = symtab_paths.vec.data ();
 
-      symbols = search_symbols (regex, FUNCTIONS_DOMAIN,
+      symbols = search_symbols (regex, FUNCTIONS_DOMAIN, NULL,
 				symtab_paths.vec.size (), files);
     }
   else
-    symbols = search_symbols (regex, FUNCTIONS_DOMAIN, 0, NULL);
+    symbols = search_symbols (regex, FUNCTIONS_DOMAIN, NULL, 0, NULL);
 
   /* Count the number of symbols (both symbols and optionally minimal
      symbols) so we can correctly check the throttle limit.  */

gdb/stack.c

@@ -88,8 +88,10 @@ const char *print_entry_values = print_entry_values_default;
 
 /* Prototypes for local functions.  */
 
-static void print_frame_local_vars (struct frame_info *, int,
+static void print_frame_local_vars (struct frame_info *frame,
-				    struct ui_file *);
+				    bool quiet,
+				    const char *regexp, const char *t_regexp,
+				    int num_tabs, struct ui_file *stream);
 
 static void print_frame (struct frame_info *frame, int print_level,
 			 enum print_what print_what,  int print_args,
@@ -1878,7 +1880,7 @@ backtrace_command_1 (const char *count_exp, frame_filter_flags flags,
 	    {
 	      struct frame_id frame_id = get_frame_id (fi);
 
-	      print_frame_local_vars (fi, 1, gdb_stdout);
+	      print_frame_local_vars (fi, false, NULL, NULL, 1, gdb_stdout);
 
 	      /* print_frame_local_vars invalidates FI.  */
 	      fi = frame_find_by_id (frame_id);
@@ -2060,6 +2062,8 @@ iterate_over_block_local_vars (const struct block *block,
 
 struct print_variable_and_value_data
 {
+  gdb::optional<compiled_regex> preg;
+  gdb::optional<compiled_regex> treg;
   struct frame_id frame_id;
   int num_tabs;
   struct ui_file *stream;
@@ -2077,6 +2081,14 @@ do_print_variable_and_value (const char *print_name,
     = (struct print_variable_and_value_data *) cb_data;
   struct frame_info *frame;
 
+  if (p->preg.has_value ()
+      && p->preg->exec (SYMBOL_NATURAL_NAME (sym), 0,
+			NULL, 0) != 0)
+    return;
+  if (p->treg.has_value ()
+      && !treg_matches_sym_type_name (*p->treg, sym))
+    return;
+
   frame = frame_find_by_id (p->frame_id);
   if (frame == NULL)
     {
@@ -2092,14 +2104,38 @@ do_print_variable_and_value (const char *print_name,
   p->values_printed = 1;
 }
 
+/* Prepares the regular expression REG from REGEXP.
+   If REGEXP is NULL, it results in an empty regular expression.  */
+
+static void
+prepare_reg (const char *regexp, gdb::optional<compiled_regex> *reg)
+{
+  if (regexp != NULL)
+    {
+      int cflags = REG_NOSUB | (case_sensitivity == case_sensitive_off
+				? REG_ICASE : 0);
+      reg->emplace (regexp, cflags, _("Invalid regexp"));
+    }
+  else
+    reg->reset ();
+}
+
 /* Print all variables from the innermost up to the function block of FRAME.
    Print them with values to STREAM indented by NUM_TABS.
+   If REGEXP is not NULL, only print local variables whose name
+   matches REGEXP.
+   If T_REGEXP is not NULL, only print local variables whose type
+   matches T_REGEXP.
+   If no local variables have been printed and !QUIET, prints a message
+   explaining why no local variables could be printed.
 
    This function will invalidate FRAME.  */
 
 static void
-print_frame_local_vars (struct frame_info *frame, int num_tabs,
+print_frame_local_vars (struct frame_info *frame,
-			struct ui_file *stream)
+			bool quiet,
+			const char *regexp, const char *t_regexp,
+			int num_tabs, struct ui_file *stream)
 {
   struct print_variable_and_value_data cb_data;
   const struct block *block;
@@ -2107,6 +2143,7 @@ print_frame_local_vars (struct frame_info *frame, int num_tabs,
 
   if (!get_frame_pc_if_available (frame, &pc))
     {
+      if (!quiet)
 	fprintf_filtered (stream,
 			  _("PC unavailable, cannot determine locals.\n"));
       return;
@@ -2115,10 +2152,13 @@ print_frame_local_vars (struct frame_info *frame, int num_tabs,
   block = get_frame_block (frame, 0);
   if (block == 0)
     {
+      if (!quiet)
 	fprintf_filtered (stream, "No symbol table info available.\n");
       return;
     }
 
+  prepare_reg (regexp, &cb_data.preg);
+  prepare_reg (t_regexp, &cb_data.treg);
   cb_data.frame_id = get_frame_id (frame);
   cb_data.num_tabs = 4 * num_tabs;
   cb_data.stream = stream;
@@ -2134,14 +2174,33 @@ print_frame_local_vars (struct frame_info *frame, int num_tabs,
 				 do_print_variable_and_value,
 				 &cb_data);
 
-  if (!cb_data.values_printed)
+  if (!cb_data.values_printed && !quiet)
+    {
+      if (regexp == NULL && t_regexp == NULL)
 	fprintf_filtered (stream, _("No locals.\n"));
+      else
+	fprintf_filtered (stream, _("No matching locals.\n"));
+    }
 }
 
 void
 info_locals_command (const char *args, int from_tty)
 {
+  std::string regexp;
+  std::string t_regexp;
+  bool quiet = false;
+
+  while (args != NULL
+	 && extract_info_print_args (&args, &quiet, &regexp, &t_regexp))
+    ;
+
+  if (args != NULL)
+    report_unrecognized_option_error ("info locals", args);
+
   print_frame_local_vars (get_selected_frame (_("No frame selected.")),
+			  quiet,
+			  regexp.empty () ? NULL : regexp.c_str (),
+			  t_regexp.empty () ? NULL : t_regexp.c_str (),
 			  0, gdb_stdout);
 }
 
@@ -2180,29 +2239,45 @@ iterate_over_block_arg_vars (const struct block *b,
 
 /* Print all argument variables of the function of FRAME.
    Print them with values to STREAM.
+   If REGEXP is not NULL, only print argument variables whose name
+   matches REGEXP.
+   If T_REGEXP is not NULL, only print argument variables whose type
+   matches T_REGEXP.
+   If no argument variables have been printed and !QUIET, prints a message
+   explaining why no argument variables could be printed.
 
    This function will invalidate FRAME.  */
 
 static void
-print_frame_arg_vars (struct frame_info *frame, struct ui_file *stream)
+print_frame_arg_vars (struct frame_info *frame,
+		      bool quiet,
+		      const char *regexp, const char *t_regexp,
+		      struct ui_file *stream)
 {
   struct print_variable_and_value_data cb_data;
   struct symbol *func;
   CORE_ADDR pc;
+  gdb::optional<compiled_regex> preg;
+  gdb::optional<compiled_regex> treg;
 
   if (!get_frame_pc_if_available (frame, &pc))
     {
-      fprintf_filtered (stream, _("PC unavailable, cannot determine args.\n"));
+      if (!quiet)
+	fprintf_filtered (stream,
+			  _("PC unavailable, cannot determine args.\n"));
       return;
     }
 
   func = get_frame_function (frame);
   if (func == NULL)
     {
+      if (!quiet)
 	fprintf_filtered (stream, _("No symbol table info available.\n"));
       return;
     }
 
+  prepare_reg (regexp, &cb_data.preg);
+  prepare_reg (t_regexp, &cb_data.treg);
   cb_data.frame_id = get_frame_id (frame);
   cb_data.num_tabs = 0;
   cb_data.stream = stream;
@@ -2214,14 +2289,34 @@ print_frame_arg_vars (struct frame_info *frame, struct ui_file *stream)
   /* do_print_variable_and_value invalidates FRAME.  */
   frame = NULL;
 
-  if (!cb_data.values_printed)
+  if (!cb_data.values_printed && !quiet)
+    {
+      if (regexp == NULL && t_regexp == NULL)
 	fprintf_filtered (stream, _("No arguments.\n"));
+      else
+	fprintf_filtered (stream, _("No matching arguments.\n"));
+    }
 }
 
 void
-info_args_command (const char *ignore, int from_tty)
+info_args_command (const char *args, int from_tty)
 {
+  std::string regexp;
+  std::string t_regexp;
+  bool quiet;
+
+  while (args != NULL
+	 && extract_info_print_args (&args, &quiet, &regexp, &t_regexp))
+    ;
+
+  if (args != NULL)
+    report_unrecognized_option_error ("info args", args);
+
+
   print_frame_arg_vars (get_selected_frame (_("No frame selected.")),
+			quiet,
+			regexp.empty () ? NULL : regexp.c_str (),
+			t_regexp.empty () ? NULL : t_regexp.c_str (),
 			gdb_stdout);
 }
 
@@ -2994,9 +3089,17 @@ Usage: info frame level LEVEL"),
 	   &info_frame_cmd_list);
 
   add_info ("locals", info_locals_command,
-	    _("Local variables of current stack frame."));
+	    info_print_args_help (_("\
+All local variables of current stack frame or those matching REGEXPs.\n\
+Usage: info locals [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
+Prints the local variables of the current stack frame.\n"),
+				  _("local variables")));
   add_info ("args", info_args_command,
-	    _("Argument variables of current stack frame."));
+	    info_print_args_help (_("\
+All argument variables of current stack frame or those matching REGEXPs.\n\
+Usage: info args [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
+Prints the argument variables of the current stack frame.\n"),
+				  _("argument variables")));
 
   if (dbx_commands)
     add_com ("func", class_stack, func_command, _("\

gdb/symtab.c

@@ -43,6 +43,7 @@
 #include "cli/cli-utils.h"
 #include "fnmatch.h"
 #include "hashtab.h"
+#include "typeprint.h"
 
 #include "gdb_obstack.h"
 #include "block.h"
@@ -4266,6 +4267,52 @@ symbol_search::compare_search_syms (const symbol_search &sym_a,
 		 SYMBOL_PRINT_NAME (sym_b.symbol));
 }
 
+/* Returns true if the type_name of symbol_type of SYM matches TREG.
+   If SYM has no symbol_type or symbol_name, returns false.  */
+
+bool
+treg_matches_sym_type_name (const compiled_regex &treg,
+			    const struct symbol *sym)
+{
+  struct type *sym_type;
+  std::string printed_sym_type_name;
+
+  if (symbol_lookup_debug > 1)
+    {
+      fprintf_unfiltered (gdb_stdlog,
+			  "treg_matches_sym_type_name\n     sym %s\n",
+			  SYMBOL_NATURAL_NAME (sym));
+    }
+
+  sym_type = SYMBOL_TYPE (sym);
+  if (sym_type == NULL)
+    return false;
+
+  if (language_mode == language_mode_auto)
+    {
+      scoped_restore_current_language l;
+
+      set_language (SYMBOL_LANGUAGE (sym));
+      printed_sym_type_name = type_to_string (sym_type);
+    }
+  else
+    printed_sym_type_name = type_to_string (sym_type);
+
+  if (symbol_lookup_debug > 1)
+    {
+      fprintf_unfiltered (gdb_stdlog,
+			  "     sym_type_name %s\n",
+			  printed_sym_type_name.c_str ());
+    }
+
+
+  if (printed_sym_type_name.empty ())
+    return false;
+
+  return treg.exec (printed_sym_type_name.c_str (), 0, NULL, 0) == 0;
+}
+
+
 /* Sort the symbols in RESULT and remove duplicates.  */
 
 static void
@@ -4281,7 +4328,9 @@ sort_search_symbols_remove_dups (std::vector<symbol_search> *result)
 
    Only symbols of KIND are searched:
    VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
-                      and constants (enums)
+                      and constants (enums).
+		      if T_REGEXP is not NULL, only returns var that have
+		      a type matching regular expression T_REGEXP.
    FUNCTIONS_DOMAIN - search all functions
    TYPES_DOMAIN     - search all type names
    ALL_DOMAIN       - an internal error for this function
@@ -4292,6 +4341,7 @@ sort_search_symbols_remove_dups (std::vector<symbol_search> *result)
 
 std::vector<symbol_search>
 search_symbols (const char *regexp, enum search_domain kind,
+		const char *t_regexp,
 		int nfiles, const char *files[])
 {
   struct compunit_symtab *cust;
@@ -4317,6 +4367,7 @@ search_symbols (const char *regexp, enum search_domain kind,
   enum minimal_symbol_type ourtype4;
   std::vector<symbol_search> result;
   gdb::optional<compiled_regex> preg;
+  gdb::optional<compiled_regex> treg;
 
   gdb_assert (kind <= TYPES_DOMAIN);
 
@@ -4366,6 +4417,13 @@ search_symbols (const char *regexp, enum search_domain kind,
       preg.emplace (regexp, cflags, _("Invalid regexp"));
     }
 
+  if (t_regexp != NULL)
+    {
+      int cflags = REG_NOSUB | (case_sensitivity == case_sensitive_off
+				? REG_ICASE : 0);
+      treg.emplace (t_regexp, cflags, _("Invalid regexp"));
+    }
+
   /* Search through the partial symtabs *first* for all symbols
      matching the regexp.  That way we don't have to reproduce all of
      the machinery below.  */
@@ -4377,7 +4435,8 @@ search_symbols (const char *regexp, enum search_domain kind,
 			   lookup_name_info::match_any (),
 			   [&] (const char *symname)
 			   {
-			     return (!preg || preg->exec (symname,
+			     return (!preg.has_value ()
+				     || preg->exec (symname,
 						    0, NULL, 0) == 0);
 			   },
 			   NULL,
@@ -4413,7 +4472,7 @@ search_symbols (const char *regexp, enum search_domain kind,
 	    || MSYMBOL_TYPE (msymbol) == ourtype3
 	    || MSYMBOL_TYPE (msymbol) == ourtype4)
 	  {
-	    if (!preg
+	    if (!preg.has_value ()
 		|| preg->exec (MSYMBOL_NATURAL_NAME (msymbol), 0,
 			       NULL, 0) == 0)
 	      {
@@ -4452,7 +4511,7 @@ search_symbols (const char *regexp, enum search_domain kind,
 				       files, nfiles, 1))
 		     && file_matches (symtab_to_fullname (real_symtab),
 				      files, nfiles, 0)))
-		&& ((!preg
+		&& ((!preg.has_value ()
 		     || preg->exec (SYMBOL_NATURAL_NAME (sym), 0,
 				    NULL, 0) == 0)
 		    && ((kind == VARIABLES_DOMAIN
@@ -4464,9 +4523,13 @@ search_symbols (const char *regexp, enum search_domain kind,
 			    We only want to skip enums here.  */
 			 && !(SYMBOL_CLASS (sym) == LOC_CONST
 			      && (TYPE_CODE (SYMBOL_TYPE (sym))
-				  == TYPE_CODE_ENUM)))
+				  == TYPE_CODE_ENUM))
+			 && (!treg.has_value ()
+			     || treg_matches_sym_type_name (*treg, sym)))
 			|| (kind == FUNCTIONS_DOMAIN
-			    && SYMBOL_CLASS (sym) == LOC_BLOCK)
+			    && SYMBOL_CLASS (sym) == LOC_BLOCK
+			    && (!treg.has_value ()
+				|| treg_matches_sym_type_name (*treg, sym)))
 			|| (kind == TYPES_DOMAIN
 			    && SYMBOL_CLASS (sym) == LOC_TYPEDEF))))
 	      {
@@ -4497,8 +4560,13 @@ search_symbols (const char *regexp, enum search_domain kind,
 	    || MSYMBOL_TYPE (msymbol) == ourtype3
 	    || MSYMBOL_TYPE (msymbol) == ourtype4)
 	  {
-	    if (!preg || preg->exec (MSYMBOL_NATURAL_NAME (msymbol), 0,
+	    /* If the user wants to see var matching a type regexp,
-				     NULL, 0) == 0)
+	       then never give a minimal symbol.  */
+	    if (kind != VARIABLES_DOMAIN
+		&& !treg.has_value () /* minimal symbol has never a type ???? */
+		&& (!preg.has_value ()
+		    || preg->exec (MSYMBOL_NATURAL_NAME (msymbol), 0,
+				   NULL, 0) == 0))
 	      {
 		/* For functions we can do a quick check of whether the
 		   symbol might be found via find_pc_symtab.  */
@@ -4599,7 +4667,9 @@ print_msymbol_info (struct bound_minimal_symbol msymbol)
    matches.  */
 
 static void
-symtab_symbol_info (const char *regexp, enum search_domain kind, int from_tty)
+symtab_symbol_info (bool quiet,
+		    const char *regexp, enum search_domain kind,
+		    const char *t_regexp, int from_tty)
 {
   static const char * const classnames[] =
     {"variable", "function", "type"};
@@ -4609,13 +4679,33 @@ symtab_symbol_info (const char *regexp, enum search_domain kind, int from_tty)
   gdb_assert (kind <= TYPES_DOMAIN);
 
   /* Must make sure that if we're interrupted, symbols gets freed.  */
-  std::vector<symbol_search> symbols = search_symbols (regexp, kind, 0, NULL);
+  std::vector<symbol_search> symbols = search_symbols (regexp, kind,
+						       t_regexp, 0, NULL);
 
+  if (!quiet)
+    {
       if (regexp != NULL)
+	{
+	  if (t_regexp != NULL)
+	    printf_filtered
+	      (_("All %ss matching regular expression \"%s\""
+		 " with type matching regulation expression \"%s\":\n"),
+	       classnames[kind], regexp, t_regexp);
+	  else
 	    printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
 			     classnames[kind], regexp);
+	}
+      else
+	{
+	  if (t_regexp != NULL)
+	    printf_filtered
+	      (_("All defined %ss"
+		 " with type matching regulation expression \"%s\" :\n"),
+	       classnames[kind], t_regexp);
 	  else
 	    printf_filtered (_("All defined %ss:\n"), classnames[kind]);
+	}
+    }
 
   for (const symbol_search &p : symbols)
     {
@@ -4625,6 +4715,7 @@ symtab_symbol_info (const char *regexp, enum search_domain kind, int from_tty)
 	{
 	  if (first)
 	    {
+	      if (!quiet)
 		printf_filtered (_("\nNon-debugging symbols:\n"));
 	      first = 0;
 	    }
@@ -4643,22 +4734,53 @@ symtab_symbol_info (const char *regexp, enum search_domain kind, int from_tty)
 }
 
 static void
-info_variables_command (const char *regexp, int from_tty)
+info_variables_command (const char *args, int from_tty)
 {
-  symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
+  std::string regexp;
+  std::string t_regexp;
+  bool quiet = false;
+
+  while (args != NULL
+	 && extract_info_print_args (&args, &quiet, &regexp, &t_regexp))
+    ;
+
+  if (args != NULL)
+    report_unrecognized_option_error ("info variables", args);
+
+  symtab_symbol_info (quiet,
+		      regexp.empty () ? NULL : regexp.c_str (),
+		      VARIABLES_DOMAIN,
+		      t_regexp.empty () ? NULL : t_regexp.c_str (),
+		      from_tty);
 }
 
+
 static void
-info_functions_command (const char *regexp, int from_tty)
+info_functions_command (const char *args, int from_tty)
 {
-  symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
+  std::string regexp;
+  std::string t_regexp;
+  bool quiet;
+
+  while (args != NULL
+	 && extract_info_print_args (&args, &quiet, &regexp, &t_regexp))
+    ;
+
+  if (args != NULL)
+    report_unrecognized_option_error ("info functions", args);
+
+  symtab_symbol_info (quiet,
+		      regexp.empty () ? NULL : regexp.c_str (),
+		      FUNCTIONS_DOMAIN,
+		      t_regexp.empty () ? NULL : t_regexp.c_str (),
+		      from_tty);
 }
 
 
 static void
 info_types_command (const char *regexp, int from_tty)
 {
-  symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
+  symtab_symbol_info (false, regexp, TYPES_DOMAIN, NULL, from_tty);
 }
 
 /* Breakpoint all functions matching regular expression.  */
@@ -4701,6 +4823,7 @@ rbreak_command (const char *regexp, int from_tty)
 
   std::vector<symbol_search> symbols = search_symbols (regexp,
 						       FUNCTIONS_DOMAIN,
+						       NULL,
 						       nfiles, files);
 
   scoped_rbreak_breakpoints finalize;
@@ -5902,14 +6025,26 @@ _initialize_symtab (void)
   symbol_cache_key
     = register_program_space_data_with_cleanup (NULL, symbol_cache_cleanup);
 
-  add_info ("variables", info_variables_command, _("\
+  add_info ("variables", info_variables_command,
-All global and static variable names, or those matching REGEXP."));
+	    info_print_args_help (_("\
+All global and static variable names or those matching REGEXPs.\n\
+Usage: info variables [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
+Prints the global and static variables.\n"),
+				  _("global and static variables")));
   if (dbx_commands)
-    add_com ("whereis", class_info, info_variables_command, _("\
+    add_com ("whereis", class_info, info_variables_command,
-All global and static variable names, or those matching REGEXP."));
+	     info_print_args_help (_("\
+All global and static variable names, or those matching REGEXPs.\n\
+Usage: whereis [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
+Prints the global and static variables.\n"),
+				   _("global and static variables")));
 
   add_info ("functions", info_functions_command,
-	    _("All function names, or those matching REGEXP."));
+	    info_print_args_help (_("\
+All function names or those matching REGEXPs.\n\
+Usage: info functions [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
+Prints the functions.\n"),
+				  _("functions")));
 
   /* FIXME:  This command has at least the following problems:
      1.  It prints builtin types (in a very strange and confusing fashion).

gdb/symtab.h

@@ -25,6 +25,7 @@
 #include <string>
 #include "gdb_vecs.h"
 #include "gdbtypes.h"
+#include "gdb_regex.h"
 #include "common/enum-flags.h"
 #include "common/function-view.h"
 #include "common/gdb_optional.h"
@@ -2057,8 +2058,12 @@ private:
 };
 
 extern std::vector<symbol_search> search_symbols (const char *,
-						  enum search_domain, int,
+						  enum search_domain,
+						  const char *,
+						  int,
 						  const char **);
+extern bool treg_matches_sym_type_name (const compiled_regex &treg,
+					const struct symbol *sym);
 
 /* The name of the ``main'' function.
    FIXME: cagney/2001-03-20: Can't make main_name() const since some