GDB 7.6.50

gdb/symfile-debug.c

Index: gdb/symfile-debug.c
diff --git a/gdb/symfile-debug.c b/gdb/symfile-debug.c
new file mode 100644
index 0000000000000000000000000000000000000000..d0991b8fdcf5d1009297d1fafda9b0006e87eee2
--- /dev/null
+++ b/gdb/symfile-debug.c
@@ -0,0 +1,693 @@
+/* Debug logging for the symbol file functions for the GNU debugger, GDB.
+
+   Copyright (C) 2013 Free Software Foundation, Inc.
+
+   Contributed by Cygnus Support, using pieces from other GDB modules.
+
+   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 3 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, see <http://www.gnu.org/licenses/>.  */
+
+/* Note: Be careful with functions that can throw errors.
+   We want to see a logging message regardless of whether an error was thrown.
+   This typically means printing a message before calling the real function
+   and then if the function returns a result printing a message after it
+   returns.  */
+
+#include "defs.h"
+#include "gdbcmd.h"
+#include "objfiles.h"
+#include "observer.h"
+#include "source.h"
+#include "symtab.h"
+#include "symfile.h"
+
+/* We need to save a pointer to the real symbol functions.
+   Plus, the debug versions are malloc'd because we have to NULL out the
+   ones that are NULL in the real copy.  */
+
+struct debug_sym_fns_data
+{
+  const struct sym_fns *real_sf;
+  struct sym_fns debug_sf;
+};
+
+/* We need to record a pointer to the real set of functions for each
+   objfile.  */
+static const struct objfile_data *symfile_debug_objfile_data_key;
+
+/* If non-zero all calls to the symfile functions are logged.  */
+static int debug_symfile = 0;
+
+/* Return non-zero if symfile debug logging is installed.  */
+
+static int
+symfile_debug_installed (struct objfile *objfile)
+{
+  return (objfile->sf != NULL
+	  && objfile_data (objfile, symfile_debug_objfile_data_key) != NULL);
+}
+
+/* Utility to return the name to print for OBJFILE.  */
+
+static const char *
+debug_objfile_name (const struct objfile *objfile)
+{
+  return lbasename (objfile->original_name);
+}
+
+/* Utility return the name to print for SYMTAB.  */
+
+static const char *
+debug_symtab_name (struct symtab *symtab)
+{
+  return symtab_to_filename_for_display (symtab);
+}
+
+/* Debugging version of struct quick_symbol_functions.  */
+
+static int
+debug_qf_has_symbols (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+  int retval;
+
+  retval = debug_data->real_sf->qf->has_symbols (objfile);
+
+  fprintf_filtered (gdb_stdlog, "qf->has_symbols (%s) = %d\n",
+		    debug_objfile_name (objfile), retval);
+
+  return retval;
+}
+
+static struct symtab *
+debug_qf_find_last_source_symtab (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+  struct symtab *retval;
+
+  fprintf_filtered (gdb_stdlog, "qf->find_last_source_symtab (%s)\n",
+		    debug_objfile_name (objfile));
+
+  retval = debug_data->real_sf->qf->find_last_source_symtab (objfile);
+
+  fprintf_filtered (gdb_stdlog, "qf->find_last_source_symtab (...) = %s\n",
+		    retval ? debug_symtab_name (retval) : "NULL");
+
+  return retval;
+}
+
+static void
+debug_qf_forget_cached_source_info (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "qf->forget_cached_source_info (%s)\n",
+		    debug_objfile_name (objfile));
+
+  debug_data->real_sf->qf->forget_cached_source_info (objfile);
+}
+
+static int
+debug_qf_map_symtabs_matching_filename (struct objfile *objfile,
+					const char *name,
+					const char *real_path,
+					int (*callback) (struct symtab *,
+							 void *),
+					void *data)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+  int retval;
+
+  fprintf_filtered (gdb_stdlog,
+		    "qf->map_symtabs_matching_filename (%s, \"%s\", \"%s\", %s, %s)\n",
+		    debug_objfile_name (objfile), name,
+		    real_path ? real_path : NULL,
+		    host_address_to_string (callback),
+		    host_address_to_string (data));
+
+  retval = debug_data->real_sf->qf->map_symtabs_matching_filename
+    (objfile, name, real_path, callback, data);
+
+  fprintf_filtered (gdb_stdlog,
+		    "qf->map_symtabs_matching_filename (...) = %d\n",
+		    retval);
+
+  return retval;
+}
+
+static struct symtab *
+debug_qf_lookup_symbol (struct objfile *objfile, int kind, const char *name,
+			domain_enum domain)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+  struct symtab *retval;
+
+  fprintf_filtered (gdb_stdlog,
+		    "qf->lookup_symbol (%s, %d, \"%s\", %s)\n",
+		    debug_objfile_name (objfile), kind, name,
+		    domain_name (domain));
+
+  retval = debug_data->real_sf->qf->lookup_symbol (objfile, kind, name,
+						   domain);
+
+  fprintf_filtered (gdb_stdlog, "qf->lookup_symbol (...) = %s\n",
+		    retval ? debug_symtab_name (retval) : "NULL");
+
+  return retval;
+}
+
+static void
+debug_qf_print_stats (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "qf->print_stats (%s)\n",
+		    debug_objfile_name (objfile));
+
+  debug_data->real_sf->qf->print_stats (objfile);
+}
+
+static void
+debug_qf_dump (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "qf->dump (%s)\n",
+		    debug_objfile_name (objfile));
+
+  debug_data->real_sf->qf->dump (objfile);
+}
+
+static void
+debug_qf_relocate (struct objfile *objfile,
+		   const struct section_offsets *new_offsets,
+		   const struct section_offsets *delta)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "qf->relocate (%s, %s, %s)\n",
+		    debug_objfile_name (objfile),
+		    host_address_to_string (new_offsets),
+		    host_address_to_string (delta));
+
+  debug_data->real_sf->qf->relocate (objfile, new_offsets, delta);
+}
+
+static void
+debug_qf_expand_symtabs_for_function (struct objfile *objfile,
+				      const char *func_name)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog,
+		    "qf->expand_symtabs_for_function (%s, \"%s\")\n",
+		    debug_objfile_name (objfile), func_name);
+
+  debug_data->real_sf->qf->expand_symtabs_for_function (objfile, func_name);
+}
+
+static void
+debug_qf_expand_all_symtabs (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "qf->expand_all_symtabs (%s)\n",
+		    debug_objfile_name (objfile));
+
+  debug_data->real_sf->qf->expand_all_symtabs (objfile);
+}
+
+static void
+debug_qf_expand_symtabs_with_fullname (struct objfile *objfile,
+				       const char *fullname)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog,
+		    "qf->expand_symtabs_with_fullname (%s, \"%s\")\n",
+		    debug_objfile_name (objfile), fullname);
+
+  debug_data->real_sf->qf->expand_symtabs_with_fullname (objfile, fullname);
+}
+
+static void
+debug_qf_map_matching_symbols (struct objfile *objfile,
+			       const char *name, domain_enum namespace,
+			       int global,
+			       int (*callback) (struct block *,
+						struct symbol *, void *),
+			       void *data,
+			       symbol_compare_ftype *match,
+			       symbol_compare_ftype *ordered_compare)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog,
+		    "qf->map_matching_symbols (%s, \"%s\", %s, %d, %s, %s, %s, %s)\n",
+		    debug_objfile_name (objfile), name,
+		    domain_name (namespace), global,
+		    host_address_to_string (callback),
+		    host_address_to_string (data),
+		    host_address_to_string (match),
+		    host_address_to_string (ordered_compare));
+
+  debug_data->real_sf->qf->map_matching_symbols (objfile, name,
+						 namespace, global,
+						 callback, data,
+						 match,
+						 ordered_compare);
+}
+
+static void
+debug_qf_expand_symtabs_matching (struct objfile *objfile,
+				  int (*file_matcher) (const char *, void *,
+						       int basenames),
+				  int (*name_matcher) (const char *, void *),
+				  enum search_domain kind,
+				  void *data)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog,
+		    "qf->expand_symtabs_matching (%s, %s, %s, %s, %s)\n",
+		    debug_objfile_name (objfile),
+		    host_address_to_string (file_matcher),
+		    host_address_to_string (name_matcher),
+		    search_domain_name (kind),
+		    host_address_to_string (data));
+
+  debug_data->real_sf->qf->expand_symtabs_matching (objfile,
+						    file_matcher,
+						    name_matcher,
+						    kind, data);
+}
+
+static struct symtab *
+debug_qf_find_pc_sect_symtab (struct objfile *objfile,
+			      struct minimal_symbol *msymbol,
+			      CORE_ADDR pc,
+			      struct obj_section *section,
+			      int warn_if_readin)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+  struct symtab *retval;
+
+  fprintf_filtered (gdb_stdlog,
+		    "qf->find_pc_sect_symtab (%s, %s, %s, %s, %d)\n",
+		    debug_objfile_name (objfile),
+		    host_address_to_string (msymbol),
+		    hex_string (pc),
+		    host_address_to_string (section),
+		    warn_if_readin);
+
+  retval = debug_data->real_sf->qf->find_pc_sect_symtab (objfile, msymbol,
+							 pc, section,
+							 warn_if_readin);
+
+  fprintf_filtered (gdb_stdlog, "qf->find_pc_sect_symtab (...) = %s\n",
+		    retval ? debug_symtab_name (retval) : "NULL");
+
+  return retval;
+}
+
+static void
+debug_qf_map_symbol_filenames (struct objfile *objfile,
+			       symbol_filename_ftype *fun, void *data,
+			       int need_fullname)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+  fprintf_filtered (gdb_stdlog,
+		    "qf->map_symbol_filenames (%s, %s, %s, %d)\n",
+		    debug_objfile_name (objfile),
+		    host_address_to_string (fun),
+		    host_address_to_string (data),
+		    need_fullname);
+
+  debug_data->real_sf->qf->map_symbol_filenames (objfile, fun, data,
+						 need_fullname);
+}
+
+static const struct quick_symbol_functions debug_sym_quick_functions =
+{
+  debug_qf_has_symbols,
+  debug_qf_find_last_source_symtab,
+  debug_qf_forget_cached_source_info,
+  debug_qf_map_symtabs_matching_filename,
+  debug_qf_lookup_symbol,
+  debug_qf_print_stats,
+  debug_qf_dump,
+  debug_qf_relocate,
+  debug_qf_expand_symtabs_for_function,
+  debug_qf_expand_all_symtabs,
+  debug_qf_expand_symtabs_with_fullname,
+  debug_qf_map_matching_symbols,
+  debug_qf_expand_symtabs_matching,
+  debug_qf_find_pc_sect_symtab,
+  debug_qf_map_symbol_filenames
+};
+
+/* Debugging version of struct sym_probe_fns.  */
+
+static VEC (probe_p) *
+debug_sym_get_probes (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+  VEC (probe_p) *retval;
+
+  retval = debug_data->real_sf->sym_probe_fns->sym_get_probes (objfile);
+
+  fprintf_filtered (gdb_stdlog,
+		    "probes->sym_get_probes (%s) = %s\n",
+		    debug_objfile_name (objfile),
+		    host_address_to_string (retval));
+
+  return retval;
+}
+
+static void
+debug_sym_relocate_probe (struct objfile *objfile,
+			  const struct section_offsets *new_offsets,
+			  const struct section_offsets *delta)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog,
+		    "probes->sym_relocate_probe (%s, %s, %s)\n",
+		    debug_objfile_name (objfile),
+		    host_address_to_string (new_offsets),
+		    host_address_to_string (delta));
+
+  debug_data->real_sf->sym_probe_fns->sym_relocate_probe
+    (objfile, new_offsets, delta);
+}
+
+static const struct sym_probe_fns debug_sym_probe_fns =
+{
+  debug_sym_get_probes,
+  debug_sym_relocate_probe
+};
+
+/* Debugging version of struct sym_fns.  */
+
+static void
+debug_sym_new_init (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "sf->sym_new_init (%s)\n",
+		    debug_objfile_name (objfile));
+
+  debug_data->real_sf->sym_new_init (objfile);
+}
+
+static void
+debug_sym_init (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "sf->sym_init (%s)\n",
+		    debug_objfile_name (objfile));
+
+  debug_data->real_sf->sym_init (objfile);
+}
+
+static void
+debug_sym_read (struct objfile *objfile, int symfile_flags)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "sf->sym_read (%s, 0x%x)\n",
+		    debug_objfile_name (objfile), symfile_flags);
+
+  debug_data->real_sf->sym_read (objfile, symfile_flags);
+}
+
+static void
+debug_sym_read_psymbols (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "sf->sym_read_psymbols (%s)\n",
+		    debug_objfile_name (objfile));
+
+  debug_data->real_sf->sym_read_psymbols (objfile);
+}
+
+static void
+debug_sym_finish (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "sf->sym_finish (%s)\n",
+		    debug_objfile_name (objfile));
+
+  debug_data->real_sf->sym_finish (objfile);
+}
+
+static void
+debug_sym_offsets (struct objfile *objfile,
+		   const struct section_addr_info *info)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "sf->sym_offsets (%s, %s)\n",
+		    debug_objfile_name (objfile),
+		    host_address_to_string (info));
+
+  debug_data->real_sf->sym_offsets (objfile, info);
+}
+
+static struct symfile_segment_data *
+debug_sym_segments (bfd *abfd)
+{
+  /* This API function is annoying, it doesn't take a "this" pointer.
+     Fortunately it is only used in one place where we (re-)lookup the
+     sym_fns table to use.  Thus we will never be called.  */
+  gdb_assert_not_reached ("debug_sym_segments called");
+}
+
+static void
+debug_sym_read_linetable (struct objfile *objfile)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  fprintf_filtered (gdb_stdlog, "sf->sym_read_linetable (%s)\n",
+		    debug_objfile_name (objfile));
+
+  debug_data->real_sf->sym_read_linetable (objfile);
+}
+
+static bfd_byte *
+debug_sym_relocate (struct objfile *objfile, asection *sectp, bfd_byte *buf)
+{
+  const struct debug_sym_fns_data *debug_data =
+    objfile_data (objfile, symfile_debug_objfile_data_key);
+  bfd_byte *retval;
+
+  retval = debug_data->real_sf->sym_relocate (objfile, sectp, buf);
+
+  fprintf_filtered (gdb_stdlog,
+		    "sf->sym_relocate (%s, %s, %s) = %s\n",
+		    debug_objfile_name (objfile),
+		    host_address_to_string (sectp),
+		    host_address_to_string (buf),
+		    host_address_to_string (retval));
+
+  return retval;
+}
+
+/* Template of debugging version of struct sym_fns.
+   A copy is made, with sym_flavour updated, and a pointer to the real table
+   installed in real_sf, and then a pointer to the copy is installed in the
+   objfile.  */
+
+static const struct sym_fns debug_sym_fns =
+{
+  debug_sym_new_init,
+  debug_sym_init,
+  debug_sym_read,
+  debug_sym_read_psymbols,
+  debug_sym_finish,
+  debug_sym_offsets,
+  debug_sym_segments,
+  debug_sym_read_linetable,
+  debug_sym_relocate,
+  &debug_sym_probe_fns,
+  &debug_sym_quick_functions
+};
+
+/* Free the copy of sym_fns recorded in the registry.  */
+
+static void
+symfile_debug_free_objfile (struct objfile *objfile, void *datum)
+{
+  xfree (datum);
+}
+
+/* Install the debugging versions of the symfile functions for OBJFILE.
+   Do not call this if the debug versions are already installed.  */
+
+static void
+install_symfile_debug_logging (struct objfile *objfile)
+{
+  const struct sym_fns *real_sf;
+  struct debug_sym_fns_data *debug_data;
+
+  /* The debug versions should not already be installed.  */
+  gdb_assert (!symfile_debug_installed (objfile));
+
+  real_sf = objfile->sf;
+
+  /* Alas we have to preserve NULL entries in REAL_SF.  */
+  debug_data = XZALLOC (struct debug_sym_fns_data);
+
+#define COPY_SF_PTR(from, to, name, func)	\
+  do {						\
+    if ((from)->name)				\
+      (to)->debug_sf.name = func;		\
+  } while (0)
+
+  COPY_SF_PTR (real_sf, debug_data, sym_new_init, debug_sym_new_init);
+  COPY_SF_PTR (real_sf, debug_data, sym_init, debug_sym_init);
+  COPY_SF_PTR (real_sf, debug_data, sym_read, debug_sym_read);
+  COPY_SF_PTR (real_sf, debug_data, sym_read_psymbols,
+	       debug_sym_read_psymbols);
+  COPY_SF_PTR (real_sf, debug_data, sym_finish, debug_sym_finish);
+  COPY_SF_PTR (real_sf, debug_data, sym_offsets, debug_sym_offsets);
+  COPY_SF_PTR (real_sf, debug_data, sym_segments, debug_sym_segments);
+  COPY_SF_PTR (real_sf, debug_data, sym_read_linetable,
+	       debug_sym_read_linetable);
+  COPY_SF_PTR (real_sf, debug_data, sym_relocate, debug_sym_relocate);
+  if (real_sf->sym_probe_fns)
+    debug_data->debug_sf.sym_probe_fns = &debug_sym_probe_fns;
+  debug_data->debug_sf.qf = &debug_sym_quick_functions;
+
+#undef COPY_SF_PTR
+
+  debug_data->real_sf = real_sf;
+  set_objfile_data (objfile, symfile_debug_objfile_data_key, debug_data);
+  objfile->sf = &debug_data->debug_sf;
+}
+
+/* Uninstall the debugging versions of the symfile functions for OBJFILE.
+   Do not call this if the debug versions are not installed.  */
+
+static void
+uninstall_symfile_debug_logging (struct objfile *objfile)
+{
+  struct debug_sym_fns_data *debug_data;
+
+  /* The debug versions should be currently installed.  */
+  gdb_assert (symfile_debug_installed (objfile));
+
+  debug_data = objfile_data (objfile, symfile_debug_objfile_data_key);
+
+  objfile->sf = debug_data->real_sf;
+  xfree (debug_data);
+  set_objfile_data (objfile, symfile_debug_objfile_data_key, NULL);
+}
+
+/* Call this function to set OBJFILE->SF.
+   Do not set OBJFILE->SF directly.  */
+
+void
+objfile_set_sym_fns (struct objfile *objfile, const struct sym_fns *sf)
+{
+  if (symfile_debug_installed (objfile))
+    {
+      gdb_assert (debug_symfile);
+      /* Remove the current one, and reinstall a new one later.  */
+      uninstall_symfile_debug_logging (objfile);
+    }
+
+  /* Assume debug logging is disabled.  */
+  objfile->sf = sf;
+
+  /* Turn debug logging on if enabled.  */
+  if (debug_symfile)
+    install_symfile_debug_logging (objfile);
+}
+
+static void
+set_debug_symfile (char *args, int from_tty, struct cmd_list_element *c)
+{
+  struct program_space *pspace;
+  struct objfile *objfile;
+
+  ALL_PSPACES (pspace)
+    ALL_PSPACE_OBJFILES (pspace, objfile)
+    {
+      if (debug_symfile)
+	{
+	  if (!symfile_debug_installed (objfile))
+	    install_symfile_debug_logging (objfile);
+	}
+      else
+	{
+	  if (symfile_debug_installed (objfile))
+	    uninstall_symfile_debug_logging (objfile);
+	}
+    }
+}
+
+static void
+show_debug_symfile (struct ui_file *file, int from_tty,
+			struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file, _("Symfile debugging is %s.\n"), value);
+}
+
+initialize_file_ftype _initialize_symfile_debug;
+
+void
+_initialize_symfile_debug (void)
+{
+  symfile_debug_objfile_data_key
+    = register_objfile_data_with_cleanup (NULL, symfile_debug_free_objfile);
+
+  add_setshow_boolean_cmd ("symfile", no_class, &debug_symfile, _("\
+Set debugging of the symfile functions."), _("\
+Show debugging of the symfile functions."), _("\
+When enabled, all calls to the symfile functions are logged."),
+			   set_debug_symfile, show_debug_symfile,
+			   &setdebuglist, &showdebuglist);
+
+  /* Note: We don't need a new-objfile observer because debug logging
+     will be installed when objfile init'n calls objfile_set_sym_fns.  */
+}