gcc-toolset-12-gdb/SOURCES/gdb-rhbz202487-rework-set-debuginfod.patch

From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alexandra=20H=C3=A1jkov=C3=A1?= <ahajkova@redhat.com>
Date: Tue, 11 Jan 2022 12:46:05 +0100
Subject: gdb-rhbz202487-rework-set-debuginfod.patch

;;Backport upstream commit from  Simon Marchi
;;333f35b6315 gdb: pass/return setting setter/getter
;;scalar values by value

gdb: rework "set debuginfod" commands

As discussed here [1], do some re-work in the "set debuginfod commands".

First, use "set debuginfod enabled on/off/ask" instead of "set
debuginfod on/off/ask".  This is more MI-friendly, and it gives an
output that makes more sense in "info set", for example.

Then, make the show commands not call "error" when debuginfod support is
not compiled in.  This makes the commands "show" and "show debuginfod"
stop early, breaking gdb.base/default.exp:

    Running /home/smarchi/src/binutils-gdb/gdb/testsuite/gdb.base/default.exp ...
    FAIL: gdb.base/default.exp: info set
    FAIL: gdb.base/default.exp: show

 - Make the "debuginfod enabled" setting default to "off" when debuginfod
   support is not compiled in, and "ask" otherwise.
 - Make the setter of "debuginfod enabled" error out when debuginfod
   support is not compiled in, so that "debuginfod enabled" will always
   remain "off" in that case.
 - Make the setter of "debuginfod verbose" work in any case.  I don't
   see the harm in letting the user change that setting, since the user will
   hit an error if they try to enable the use of debuginfod.
 - I would do the same for the "debuginfod urls" setter, but because
   this one needs to see the DEBUGINFOD_URLS_ENV_VAR macro, provided by
   libdebuginfod, I made that one error out as well if debuginfod
   support is not compiled it (otherwise, I would have left it like
   "debuginfod verbose".  Alternatively, we could hard-code
   "DEBUGINFOD_URLS" in the code (in fact, it was prior to this patch,
   but I think it was an oversight, as other spots use
   DEBUGINFOD_URLS_ENV_VAR), or use a dummy string to store the setting,
   but I don't really see the value in that.

Rename debuginfod_enable to debuginfod_enabled, just so it matches the
setting name.

[1] https://sourceware.org/pipermail/gdb-patches/2021-October/182937.html

Change-Id: I45fdb2993f668226a5639228951362b7800f09d5
Co-Authored-By: Aaron Merey <amerey@redhat.com>

diff --git a/gdb/debuginfod-support.c b/gdb/debuginfod-support.c
--- a/gdb/debuginfod-support.c
+++ b/gdb/debuginfod-support.c
@@ -32,8 +32,22 @@ static const char debuginfod_on[] = "on";
 static const char debuginfod_off[] = "off";
 static const char debuginfod_ask[] = "ask";
 
-static const char *debuginfod_enable = debuginfod_ask;
-static unsigned debuginfod_verbose = 1;
+static const char *debuginfod_enabled_enum[] =
+{
+  debuginfod_on,
+  debuginfod_off,
+  debuginfod_ask,
+  nullptr
+};
+
+static const char *debuginfod_enabled =
+#if defined(HAVE_LIBDEBUGINFOD)
+  debuginfod_ask;
+#else
+  debuginfod_off;
+#endif
+
+static unsigned int debuginfod_verbose = 1;
 
 /* This is never actually used.  URLs are always pulled from the
    environment.  */
@@ -60,64 +74,6 @@ debuginfod_debuginfo_query (const unsigned char *build_id,
 
 #define NO_IMPL _("Support for debuginfod is not compiled into GDB.")
 
-/* Stub set/show commands that indicate debuginfod is not supported.  */
-
-static void
-set_debuginfod_on_command (const char *args, int from_tty)
-{
-  error (NO_IMPL);
-  debuginfod_enable = debuginfod_off;
-}
-
-static void
-set_debuginfod_off_command (const char *args, int from_tty)
-{
-  error (NO_IMPL);
-  debuginfod_enable = debuginfod_off;
-}
-
-static void
-set_debuginfod_ask_command (const char *args, int from_tty)
-{
-  error (NO_IMPL);
-  debuginfod_enable = debuginfod_off;
-}
-
-static void
-show_debuginfod_status_command (const char *args, int from_tty)
-{
-  error (NO_IMPL);
-}
-
-static void
-set_debuginfod_urls_command (const char *ignore, int from_tty,
-                             struct cmd_list_element *c)
-{
-  error (NO_IMPL);
-}
-
-static void
-show_debuginfod_urls_command (struct ui_file *file, int from_tty,
-			      struct cmd_list_element *cmd, const char *value)
-{
-  error (NO_IMPL);
-}
-
-static void
-set_debuginfod_verbose_command (const char *args, int from_tty,
-				struct cmd_list_element *c)
-{
-  error (NO_IMPL);
-  debuginfod_verbose = 0;
-}
-
-static void
-show_debuginfod_verbose_command (struct ui_file *file, int from_tty,
-				 struct cmd_list_element *cmd,
-				 const char *value)
-{
-  error (NO_IMPL);
-}
 #else
 #include <elfutils/debuginfod.h>
 
@@ -145,82 +101,6 @@ struct debuginfod_client_deleter
 using debuginfod_client_up
   = std::unique_ptr<debuginfod_client, debuginfod_client_deleter>;
 
-/* Enable debuginfod.  */
-
-static void
-set_debuginfod_on_command (const char *args, int from_tty)
-{
-  debuginfod_enable = debuginfod_on;
-}
-
-/* Disable debuginfod.  */
-
-static void
-set_debuginfod_off_command (const char *args, int from_tty)
-{
-  debuginfod_enable = debuginfod_off;
-}
-
-/* Before next query, ask user whether to enable debuginfod.  */
-
-static void
-set_debuginfod_ask_command (const char *args, int from_tty)
-{
-  debuginfod_enable = debuginfod_ask;
-}
-
-/* Show whether debuginfod is enabled.  */
-
-static void
-show_debuginfod_status_command (const char *args, int from_tty)
-{
-  printf_unfiltered (_("Debuginfod functionality is currently set to " \
-		     "\"%s\".\n"), debuginfod_enable);
-}
-
-/* Set the URLs that debuginfod will query.  */
-
-static void
-set_debuginfod_urls_command (const char *ignore, int from_tty,
-                             struct cmd_list_element *c)
-{
-  gdb_assert (debuginfod_urls != nullptr);
-  if (setenv ("DEBUGINFOD_URLS", debuginfod_urls, 1) != 0)
-    warning (_("Unable to set debuginfod URLs: %s"), safe_strerror (errno));
-}
-
-/* Show the URLs that debuginfod will query.  */
-
-static void
-show_debuginfod_urls_command (struct ui_file *file, int from_tty,
-			      struct cmd_list_element *cmd, const char *value)
-{
-  if (value == nullptr || value[0] == '\0')
-    fprintf_unfiltered (file, _("Debuginfod URLs have not been set.\n"));
-  else
-    fprintf_filtered (file, _("Debuginfod URLs are currently set to:\n%s\n"),
-		      value);
-}
-
-/* No-op setter used for compatibility when gdb is built without debuginfod.  */
-
-static void
-set_debuginfod_verbose_command (const char *args, int from_tty,
-				struct cmd_list_element *c)
-{
-  return;
-}
-
-/* Show verbosity.  */
-
-static void
-show_debuginfod_verbose_command (struct ui_file *file, int from_tty,
-				 struct cmd_list_element *cmd, const char *value)
-{
-  fprintf_filtered (file, _("Debuginfod verbose output is set to %s.\n"),
-		    value);
-}
-
 static int
 progressfn (debuginfod_client *c, long cur, long total)
 {
@@ -277,15 +157,15 @@ get_debuginfod_client ()
    whether to enable debuginfod.  */
 
 static bool
-debuginfod_enabled ()
+debuginfod_is_enabled ()
 {
   const char *urls = getenv (DEBUGINFOD_URLS_ENV_VAR);
 
   if (urls == nullptr || urls[0] == '\0'
-      || debuginfod_enable == debuginfod_off)
+      || debuginfod_enabled == debuginfod_off)
     return false;
 
-  if (debuginfod_enable == debuginfod_ask)
+  if (debuginfod_enabled == debuginfod_ask)
     {
       int resp = nquery (_("\nThis GDB supports auto-downloading debuginfo " \
 			   "from the following URLs:\n%s\nEnable debuginfod " \
@@ -294,16 +174,16 @@ debuginfod_enabled ()
       if (!resp)
 	{
 	  printf_filtered (_("Debuginfod has been disabled.\nTo make this " \
-			     "setting permanent, add \'set debuginfod off\' " \
-			     "to .gdbinit.\n"));
-	  debuginfod_enable = debuginfod_off;
+			     "setting permanent, add \'set debuginfod " \
+			     "enabled off\' to .gdbinit.\n"));
+	  debuginfod_enabled = debuginfod_off;
 	  return false;
 	}
 
       printf_filtered (_("Debuginfod has been enabled.\nTo make this " \
-			 "setting permanent, add \'set debuginfod on\' " \
-			 "to .gdbinit.\n"));
-      debuginfod_enable = debuginfod_on;
+			 "setting permanent, add \'set debuginfod enabled " \
+			 "on\' to .gdbinit.\n"));
+      debuginfod_enabled = debuginfod_on;
     }
 
   return true;
@@ -317,7 +197,7 @@ debuginfod_source_query (const unsigned char *build_id,
 			 const char *srcpath,
 			 gdb::unique_xmalloc_ptr<char> *destname)
 {
-  if (!debuginfod_enabled ())
+  if (!debuginfod_is_enabled ())
     return scoped_fd (-ENOSYS);
 
   debuginfod_client *c = get_debuginfod_client ();
@@ -354,7 +234,7 @@ debuginfod_debuginfo_query (const unsigned char *build_id,
 			    const char *filename,
 			    gdb::unique_xmalloc_ptr<char> *destname)
 {
-  if (!debuginfod_enabled ())
+  if (!debuginfod_is_enabled ())
     return scoped_fd (-ENOSYS);
 
   debuginfod_client *c = get_debuginfod_client ();
@@ -382,6 +262,67 @@ debuginfod_debuginfo_query (const unsigned char *build_id,
 }
 #endif
 
+/* Set callback for "set debuginfod enabled".  */
+
+static void
+set_debuginfod_enabled (const char *args, int from_tty,
+                        struct cmd_list_element *c)
+{
+#if defined(HAVE_LIBDEBUGINFOD)
+  /* Value is already set.  */
+#else
+  error (NO_IMPL);
+#endif
+}
+
+/* Show callback for "set debuginfod enabled".  */
+
+static void
+show_debuginfod_enabled (ui_file *file, int from_tty, cmd_list_element *cmd,
+			 const char *value)
+{
+  printf_unfiltered (_("Debuginfod functionality is currently set to "
+		       "\"%s\".\n"), debuginfod_enabled);
+}
+
+/* Set callback for "set debuginfod urls".  */
+
+static void
+set_debuginfod_urls (const char *args, int from_tty,
+                     struct cmd_list_element *c)
+{
+#if defined(HAVE_LIBDEBUGINFOD)
+  gdb_assert (debuginfod_urls != nullptr);
+  if (setenv (DEBUGINFOD_URLS_ENV_VAR, debuginfod_urls, 1) != 0)
+    warning (_("Unable to set debuginfod URLs: %s"), safe_strerror (errno));
+#else
+  error (NO_IMPL);
+#endif
+}
+
+/* Show callback for "set debuginfod urls".  */
+
+static void
+show_debuginfod_urls (ui_file *file, int from_tty, cmd_list_element *cmd,
+		      const char *value)
+{
+  if (value[0] == '\0')
+    fprintf_unfiltered (file, _("Debuginfod URLs have not been set.\n"));
+  else
+    fprintf_filtered (file, _("Debuginfod URLs are currently set to:\n%s\n"),
+		      value);
+}
+
+/* Show callback for "set debuginfod verbose".  */
+
+static void
+show_debuginfod_verbose_command (ui_file *file, int from_tty,
+				 cmd_list_element *cmd, const char *value)
+{
+  fprintf_filtered (file, _("Debuginfod verbose output is set to %s.\n"),
+		    value);
+}
+
 /* Register debuginfod commands.  */
 
 void _initialize_debuginfod ();
@@ -397,23 +338,17 @@ _initialize_debuginfod ()
                        _("Show debuginfod option."),
                        &show_debuginfod_prefix_list, 0, &showlist);
 
-  /* set debuginfod on */
-  add_cmd ("on", class_run, set_debuginfod_on_command,
-	   _("Enable debuginfod."), &set_debuginfod_prefix_list);
-
-  /* set debuginfod off */
-  add_cmd ("off", class_run, set_debuginfod_off_command,
-	   _("Disable debuginfod."), &set_debuginfod_prefix_list);
-
-  /* set debuginfod ask */
-  add_cmd ("ask", class_run, set_debuginfod_ask_command, _("\
-Ask the user whether to enable debuginfod before performing the next query."),
-	   &set_debuginfod_prefix_list);
-
-  /* show debuginfod status */
-  add_cmd ("status", class_run, show_debuginfod_status_command,
-	   _("Show whether debuginfod is set to \"on\", \"off\" or \"ask\"."),
-	   &show_debuginfod_prefix_list);
+  add_setshow_enum_cmd ("enabled", class_run, debuginfod_enabled_enum,
+                        &debuginfod_enabled,
+			_("Set whether to use debuginfod."),
+			_("Show whether to use debuginfod."),
+			_("\
+When on, enable the use of debuginfod to download missing debug info and\n\
+source files."),
+			set_debuginfod_enabled,
+			show_debuginfod_enabled,
+			&set_debuginfod_prefix_list,
+			&show_debuginfod_prefix_list);
 
   /* set/show debuginfod urls */
   add_setshow_string_noescape_cmd ("urls", class_run, &debuginfod_urls, _("\
@@ -422,8 +357,8 @@ Show the list of debuginfod server URLs."), _("\
 Manage the space-separated list of debuginfod server URLs that GDB will query \
 when missing debuginfo, executables or source files.\nThe default value is \
 copied from the DEBUGINFOD_URLS environment variable."),
-				   set_debuginfod_urls_command,
-				   show_debuginfod_urls_command,
+				   set_debuginfod_urls,
+				   show_debuginfod_urls,
 				   &set_debuginfod_prefix_list,
 				   &show_debuginfod_prefix_list);
   if (getenv ("DEBUGINFOD_URLS") != nullptr)
@@ -436,7 +371,7 @@ Set verbosity of debuginfod output."), _("\
 Show debuginfod debugging."), _("\
 When set to a non-zero value, display verbose output for each debuginfod \
 query.\nTo disable, set to zero.  Verbose output is displayed by default."),
-			     set_debuginfod_verbose_command,
+			     nullptr,
 			     show_debuginfod_verbose_command,
 			     &set_debuginfod_prefix_list,
 			     &show_debuginfod_prefix_list);
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -47046,27 +47046,28 @@ regarding @code{debuginfod}.
 @value{GDBN} provides the following commands for configuring @code{debuginfod}.
 
 @table @code
-@kindex set debuginfod
-@anchor{set debuginfod}
-@item set debuginfod
-@itemx set debuginfod on
+@kindex set debuginfod enabled
+@anchor{set debuginfod enabled}
+@item set debuginfod enabled
+@itemx set debuginfod enabled on
 @cindex enable debuginfod
 @value{GDBN} will attempt to query @code{debuginfod} servers when missing debug
 info or source files.
 
-@item set debuginfod off
+@item set debuginfod enabled off
 @value{GDBN} will not attempt to query @code{debuginfod} servers when missing
-debug info or source files.  By default, @code{debuginfod} is set to @code{off}
-for non-interactive sessions.
+debug info or source files.  By default, @code{debuginfod enabled} is set to
+@code{off} for non-interactive sessions.
 
-@item set debuginfod ask
+@item set debuginfod enabled ask
 @value{GDBN} will prompt the user to enable or disable @code{debuginfod} before
-attempting to perform the next query.  By default, @code{debuginfod} is set to
-@code{ask} for interactive sessions.
+attempting to perform the next query.  By default, @code{debuginfod enabled}
+is set to @code{ask} for interactive sessions.
 
-@kindex show debuginfod status
-@item show debuginfod status
-Show whether @code{debuginfod} is set to @code{on}, @code{off} or @code{ask}.
+@kindex show debuginfod enabled
+@item show debuginfod enabled
+Display whether @code{debuginfod enabled} is set to @code{on}, @code{off} or
+@code{ask}.
 
 @kindex set debuginfod urls
 @cindex configure debuginfod URLs
diff --git a/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp b/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp
--- a/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp
+++ b/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp
@@ -236,7 +236,7 @@ proc local_url { } {
     clean_restart
     gdb_test "file $binfile" ".*No debugging symbols.*" \
 	"file [file tail $binfile] cmd"
-    gdb_test_no_output "set debuginfod off"
+    gdb_test_no_output "set debuginfod enabled off"
     gdb_test_no_output "set debuginfod urls http://127.0.0.1:$port"
 
     # gdb shouldn't find the debuginfo since debuginfod has been disabled
@@ -244,7 +244,7 @@ proc local_url { } {
 	"file [file tail $binfile] cmd off"
 
     # Enable debuginfod and fetch the debuginfo
-    gdb_test_no_output "set debuginfod on"
+    gdb_test_no_output "set debuginfod enabled on"
     gdb_test "file $binfile" ".*Reading symbols from.*debuginfo.*" \
 	"file [file tail $binfile] cmd on"
 }