Adding upstream version 43.9.upstream/43.9upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 599 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..2311a74
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,599 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#include "config.h"
+
+#if defined (HAVE_MALLINFO) || defined (HAVE_MALLINFO2)
+#include <malloc.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+
+#include <cogl-pango/cogl-pango.h>
+#include <clutter/clutter.h>
+#include <gtk/gtk.h>
+#include <glib-unix.h>
+#include <glib/gi18n-lib.h>
+#include <girepository.h>
+#include <meta/meta-context.h>
+#include <meta/meta-plugin.h>
+#include <meta/prefs.h>
+#include <atk-bridge.h>
+
+#include "shell-global.h"
+#include "shell-global-private.h"
+#include "shell-perf-log.h"
+#include "st.h"
+
+extern GType gnome_shell_plugin_get_type (void);
+
+#define SHELL_DBUS_SERVICE "org.gnome.Shell"
+
+#define WM_NAME "GNOME Shell"
+#define GNOME_WM_KEYBINDINGS "Mutter,GNOME Shell"
+
+static gboolean is_gdm_mode = FALSE;
+static char *session_mode = NULL;
+static int caught_signal = 0;
+
+#define DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER 1
+#define DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER 4
+
+enum {
+  SHELL_DEBUG_BACKTRACE_WARNINGS = 1,
+  SHELL_DEBUG_BACKTRACE_SEGFAULTS = 2,
+};
+static int _shell_debug;
+static gboolean _tracked_signals[NSIG] = { 0 };
+
+static void
+shell_dbus_acquire_name (GDBusProxy  *bus,
+                         guint32      request_name_flags,
+                         guint32     *request_name_result,
+                         const gchar *name,
+                         gboolean     fatal)
+{
+  GError *error = NULL;
+  GVariant *request_name_variant;
+
+  if (!(request_name_variant = g_dbus_proxy_call_sync (bus,
+                                                       "RequestName",
+                                                       g_variant_new ("(su)", name, request_name_flags),
+                                                       0, /* call flags */
+                                                       -1, /* timeout */
+                                                       NULL, /* cancellable */
+                                                       &error)))
+    {
+      g_printerr ("failed to acquire %s: %s\n", name, error->message);
+      g_clear_error (&error);
+      if (!fatal)
+        return;
+      exit (1);
+    }
+  g_variant_get (request_name_variant, "(u)", request_name_result);
+  g_variant_unref (request_name_variant);
+}
+
+static void
+shell_dbus_init (gboolean replace)
+{
+  GDBusConnection *session;
+  GDBusProxy *bus;
+  GError *error = NULL;
+  guint32 request_name_flags;
+  guint32 request_name_result;
+
+  session = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);
+
+  if (error) {
+    g_printerr ("Failed to connect to session bus: %s", error->message);
+    exit (1);
+  }
+
+  bus = g_dbus_proxy_new_sync (session,
+                               G_DBUS_PROXY_FLAGS_NONE,
+                               NULL, /* interface info */
+                               "org.freedesktop.DBus",
+                               "/org/freedesktop/DBus",
+                               "org.freedesktop.DBus",
+                               NULL, /* cancellable */
+                               &error);
+
+  if (!bus)
+    {
+      g_printerr ("Failed to get a session bus proxy: %s", error->message);
+      exit (1);
+    }
+
+  request_name_flags = G_BUS_NAME_OWNER_FLAGS_ALLOW_REPLACEMENT;
+  if (replace)
+    request_name_flags |= G_BUS_NAME_OWNER_FLAGS_REPLACE;
+
+  shell_dbus_acquire_name (bus,
+                           request_name_flags,
+                           &request_name_result,
+                           SHELL_DBUS_SERVICE, TRUE);
+  if (!(request_name_result == DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER
+        || request_name_result == DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER))
+    {
+      g_printerr (SHELL_DBUS_SERVICE " already exists on bus and --replace not specified\n");
+      exit (1);
+    }
+
+  g_object_unref (bus);
+  g_object_unref (session);
+}
+
+static void
+shell_introspection_init (void)
+{
+
+  g_irepository_prepend_search_path (MUTTER_TYPELIB_DIR);
+  g_irepository_prepend_search_path (GNOME_SHELL_PKGLIBDIR);
+
+  /* We need to explicitly add the directories where the private libraries are
+   * installed to the GIR's library path, so that they can be found at runtime
+   * when linking using DT_RUNPATH (instead of DT_RPATH), which is the default
+   * for some linkers (e.g. gold) and in some distros (e.g. Debian).
+   */
+  g_irepository_prepend_library_path (MUTTER_TYPELIB_DIR);
+  g_irepository_prepend_library_path (GNOME_SHELL_PKGLIBDIR);
+}
+
+static void
+shell_fonts_init (void)
+{
+  CoglPangoFontMap *fontmap;
+
+  /* Disable text mipmapping; it causes problems on pre-GEM Intel
+   * drivers and we should just be rendering text at the right
+   * size rather than scaling it. If we do effects where we dynamically
+   * zoom labels, then we might want to reconsider.
+   */
+  fontmap = COGL_PANGO_FONT_MAP (clutter_get_font_map ());
+  cogl_pango_font_map_set_use_mipmapping (fontmap, FALSE);
+}
+
+static void
+shell_profiler_init (void)
+{
+  ShellGlobal *global;
+  GjsProfiler *profiler;
+  GjsContext *context;
+  const char *enabled;
+  const char *fd_str;
+  int fd = -1;
+
+  /* Sysprof uses the "GJS_TRACE_FD=N" environment variable to connect GJS
+   * profiler data to the combined Sysprof capture. Since we are in control of
+   * the GjsContext, we need to proxy this FD across to the GJS profiler.
+   */
+
+  fd_str = g_getenv ("GJS_TRACE_FD");
+  enabled = g_getenv ("GJS_ENABLE_PROFILER");
+  if (fd_str == NULL || enabled == NULL)
+    return;
+
+  global = shell_global_get ();
+  g_return_if_fail (global);
+
+  context = _shell_global_get_gjs_context (global);
+  g_return_if_fail (context);
+
+  profiler = gjs_context_get_profiler (context);
+  g_return_if_fail (profiler);
+
+  if (fd_str)
+    {
+      fd = atoi (fd_str);
+
+      if (fd > 2)
+        {
+          gjs_profiler_set_fd (profiler, fd);
+          gjs_profiler_start (profiler);
+        }
+    }
+}
+
+static void
+shell_profiler_shutdown (void)
+{
+  ShellGlobal *global;
+  GjsProfiler *profiler;
+  GjsContext *context;
+
+  global = shell_global_get ();
+  context = _shell_global_get_gjs_context (global);
+  profiler = gjs_context_get_profiler (context);
+
+  if (profiler)
+    gjs_profiler_stop (profiler);
+}
+
+static void
+malloc_statistics_callback (ShellPerfLog *perf_log,
+                            gpointer      data)
+{
+#if defined (HAVE_MALLINFO) || defined (HAVE_MALLINFO2)
+#ifdef HAVE_MALLINFO2
+  struct mallinfo2 info = mallinfo2 ();
+#else
+  struct mallinfo info = mallinfo ();
+#endif
+
+  shell_perf_log_update_statistic_i (perf_log,
+                                     "malloc.arenaSize",
+                                     info.arena);
+  shell_perf_log_update_statistic_i (perf_log,
+                                     "malloc.mmapSize",
+                                     info.hblkhd);
+  shell_perf_log_update_statistic_i (perf_log,
+                                     "malloc.usedSize",
+                                     info.uordblks);
+#endif /* defined (HAVE_MALLINFO) || defined (HAVE_MALLINFO2) */
+}
+
+static void
+shell_perf_log_init (void)
+{
+  ShellPerfLog *perf_log = shell_perf_log_get_default ();
+
+  /* For probably historical reasons, mallinfo() defines the returned values,
+   * even those in bytes as int, not size_t. We're determined not to use
+   * more than 2G of malloc'ed memory, so are OK with that.
+   */
+  shell_perf_log_define_statistic (perf_log,
+                                   "malloc.arenaSize",
+                                   "Amount of memory allocated by malloc() with brk(), in bytes",
+                                   "i");
+  shell_perf_log_define_statistic (perf_log,
+                                   "malloc.mmapSize",
+                                   "Amount of memory allocated by malloc() with mmap(), in bytes",
+                                   "i");
+  shell_perf_log_define_statistic (perf_log,
+                                   "malloc.usedSize",
+                                   "Amount of malloc'ed memory currently in use",
+                                   "i");
+
+  shell_perf_log_add_statistics_callback (perf_log,
+                                          malloc_statistics_callback,
+                                          NULL, NULL);
+}
+
+static void
+shell_a11y_init (void)
+{
+  cally_accessibility_init ();
+
+  if (clutter_get_accessibility_enabled () == FALSE)
+    {
+      g_warning ("Accessibility: clutter has no accessibility enabled"
+                 " skipping the atk-bridge load");
+    }
+  else
+    {
+      atk_bridge_adaptor_init (NULL, NULL);
+    }
+}
+
+static void
+shell_init_debug (const char *debug_env)
+{
+  static const GDebugKey keys[] = {
+    { "backtrace-warnings", SHELL_DEBUG_BACKTRACE_WARNINGS },
+    { "backtrace-segfaults", SHELL_DEBUG_BACKTRACE_SEGFAULTS },
+  };
+
+  _shell_debug = g_parse_debug_string (debug_env, keys,
+                                       G_N_ELEMENTS (keys));
+}
+
+static GLogWriterOutput
+default_log_writer (GLogLevelFlags   log_level,
+                    const GLogField *fields,
+                    gsize            n_fields,
+                    gpointer         user_data)
+{
+  GLogWriterOutput output;
+  int i;
+
+  output = g_log_writer_default (log_level, fields, n_fields, user_data);
+
+  if ((_shell_debug & SHELL_DEBUG_BACKTRACE_WARNINGS) &&
+      ((log_level & G_LOG_LEVEL_CRITICAL) ||
+       (log_level & G_LOG_LEVEL_WARNING)))
+    {
+      const char *log_domain = NULL;
+
+      for (i = 0; i < n_fields; i++)
+        {
+          if (g_strcmp0 (fields[i].key, "GLIB_DOMAIN") == 0)
+            {
+              log_domain = fields[i].value;
+              break;
+            }
+        }
+
+      /* Filter out Gjs logs, those already have the stack */
+      if (g_strcmp0 (log_domain, "Gjs") != 0)
+        gjs_dumpstack ();
+    }
+
+  return output;
+}
+
+static GLogWriterOutput
+shut_up (GLogLevelFlags   log_level,
+         const GLogField *fields,
+         gsize            n_fields,
+         gpointer         user_data)
+{
+  return (GLogWriterOutput) {0};
+}
+
+static void
+dump_gjs_stack_alarm_sigaction (int signo)
+{
+  g_log_set_writer_func (g_log_writer_default, NULL, NULL);
+  g_warning ("Failed to dump Javascript stack, got stuck");
+  g_log_set_writer_func (default_log_writer, NULL, NULL);
+
+  raise (caught_signal);
+}
+
+static void
+dump_gjs_stack_on_signal_handler (int signo)
+{
+  struct sigaction sa = { .sa_handler = dump_gjs_stack_alarm_sigaction };
+  gsize i;
+
+  /* Ignore all the signals starting this point, a part the one we'll raise
+   * (which is implicitly ignored here through SA_RESETHAND), this is needed
+   * not to get this handler being called by other signals that we were
+   * tracking and that might be emitted by code called starting from now.
+   */
+  for (i = 0; i < G_N_ELEMENTS (_tracked_signals); ++i)
+    {
+      if (_tracked_signals[i] && i != signo)
+        signal (i, SIG_IGN);
+    }
+
+  /* Waiting at least 5 seconds for the dumpstack, if it fails, we raise the error */
+  caught_signal = signo;
+  sigemptyset (&sa.sa_mask);
+  sigaction (SIGALRM, &sa, NULL);
+
+  alarm (5);
+  gjs_dumpstack ();
+  alarm (0);
+
+  raise (signo);
+}
+
+static void
+dump_gjs_stack_on_signal (int signo)
+{
+  struct sigaction sa = {
+    .sa_flags   = SA_RESETHAND | SA_NODEFER,
+    .sa_handler = dump_gjs_stack_on_signal_handler,
+  };
+
+  sigemptyset (&sa.sa_mask);
+
+  sigaction (signo, &sa, NULL);
+  _tracked_signals[signo] = TRUE;
+}
+
+static gboolean
+list_modes (const char  *option_name,
+            const char  *value,
+            gpointer     data,
+            GError     **error)
+{
+  ShellGlobal *global;
+  GjsContext *context;
+  const char *script;
+  int status;
+
+  /* Many of our imports require global to be set, so rather than
+   * tayloring our imports carefully here to avoid that dependency,
+   * we just set it.
+   * ShellGlobal has some GTK+ dependencies, so initialize GTK+; we
+   * don't really care if it fails though (e.g. when running from a tty),
+   * so we mute all warnings */
+  g_log_set_writer_func (shut_up, NULL, NULL);
+  gtk_init_check (NULL, NULL);
+
+  _shell_global_init (NULL);
+  global = shell_global_get ();
+  context = _shell_global_get_gjs_context (global);
+
+  shell_introspection_init ();
+
+  script = "imports.ui.environment.init();"
+           "imports.ui.sessionMode.listModes();";
+  if (!gjs_context_eval (context, script, -1, "<main>", &status, NULL))
+      g_message ("Retrieving list of available modes failed.");
+
+  g_object_unref (context);
+  exit (status);
+}
+
+static gboolean
+print_version (const gchar    *option_name,
+               const gchar    *value,
+               gpointer        data,
+               GError        **error)
+{
+  g_print ("GNOME Shell %s\n", VERSION);
+  exit (0);
+}
+
+GOptionEntry gnome_shell_options[] = {
+  {
+    "version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
+    print_version,
+    N_("Print version"),
+    NULL
+  },
+  {
+    "gdm-mode", 0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_NONE,
+    &is_gdm_mode,
+    N_("Mode used by GDM for login screen"),
+    NULL
+  },
+  {
+    "mode", 0, 0, G_OPTION_ARG_STRING,
+    &session_mode,
+    N_("Use a specific mode, e.g. “gdm” for login screen"),
+    "MODE"
+  },
+  {
+    "list-modes", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
+    list_modes,
+    N_("List possible modes"),
+    NULL
+  },
+  { NULL }
+};
+
+static gboolean
+on_sigterm (gpointer user_data)
+{
+  MetaContext *context = META_CONTEXT (user_data);
+
+  meta_context_terminate (context);
+
+  return G_SOURCE_REMOVE;
+}
+
+static void
+init_signal_handlers (MetaContext *context)
+{
+  struct sigaction act = { 0 };
+  sigset_t empty_mask;
+
+  sigemptyset (&empty_mask);
+  act.sa_handler = SIG_IGN;
+  act.sa_mask = empty_mask;
+  act.sa_flags = 0;
+  if (sigaction (SIGPIPE,  &act, NULL) < 0)
+    g_warning ("Failed to register SIGPIPE handler: %s", g_strerror (errno));
+#ifdef SIGXFSZ
+  if (sigaction (SIGXFSZ,  &act, NULL) < 0)
+    g_warning ("Failed to register SIGXFSZ handler: %s", g_strerror (errno));
+#endif
+
+  g_unix_signal_add (SIGTERM, on_sigterm, context);
+}
+
+static void
+change_to_home_directory (void)
+{
+  const char *home_dir;
+
+  home_dir = g_get_home_dir ();
+  if (!home_dir)
+    return;
+
+  if (chdir (home_dir) < 0)
+    g_warning ("Could not change to home directory %s", home_dir);
+}
+
+int
+main (int argc, char **argv)
+{
+  g_autoptr (MetaContext) context = NULL;
+  GError *error = NULL;
+  int ecode = EXIT_SUCCESS;
+
+  bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+  textdomain (GETTEXT_PACKAGE);
+
+  context = meta_create_context (WM_NAME);
+  meta_context_add_option_entries (context, gnome_shell_options,
+                                   GETTEXT_PACKAGE);
+  meta_context_add_option_group (context, g_irepository_get_option_group ());
+
+  session_mode = (char *) g_getenv ("GNOME_SHELL_SESSION_MODE");
+
+  if (!meta_context_configure (context, &argc, &argv, &error))
+    {
+      g_printerr ("Failed to configure: %s", error->message);
+      return EXIT_FAILURE;
+    }
+
+  meta_context_set_plugin_gtype (context, gnome_shell_plugin_get_type ());
+  meta_context_set_gnome_wm_keybindings (context, GNOME_WM_KEYBINDINGS);
+
+  init_signal_handlers (context);
+  change_to_home_directory ();
+
+  if (!meta_context_setup (context, &error))
+    {
+      g_printerr ("Failed to setup: %s", error->message);
+      return EXIT_FAILURE;
+    }
+
+  /* FIXME: Add gjs API to set this stuff and don't depend on the
+   * environment.  These propagate to child processes.
+   */
+  g_setenv ("GJS_DEBUG_OUTPUT", "stderr", TRUE);
+  g_setenv ("GJS_DEBUG_TOPICS", "JS ERROR;JS LOG", TRUE);
+
+  shell_init_debug (g_getenv ("SHELL_DEBUG"));
+
+  shell_dbus_init (meta_context_is_replacing (context));
+  shell_a11y_init ();
+  shell_perf_log_init ();
+  shell_introspection_init ();
+  shell_fonts_init ();
+
+  g_log_set_writer_func (default_log_writer, NULL, NULL);
+
+  /* Initialize the global object */
+  if (session_mode == NULL)
+    session_mode = is_gdm_mode ? (char *)"gdm" : (char *)"user";
+
+  _shell_global_init ("session-mode", session_mode, NULL);
+
+  dump_gjs_stack_on_signal (SIGABRT);
+  dump_gjs_stack_on_signal (SIGFPE);
+  dump_gjs_stack_on_signal (SIGIOT);
+  dump_gjs_stack_on_signal (SIGTRAP);
+
+  if ((_shell_debug & SHELL_DEBUG_BACKTRACE_SEGFAULTS))
+    {
+      dump_gjs_stack_on_signal (SIGBUS);
+      dump_gjs_stack_on_signal (SIGSEGV);
+    }
+
+  shell_profiler_init ();
+
+  if (meta_context_get_compositor_type (context) == META_COMPOSITOR_TYPE_WAYLAND)
+    meta_context_raise_rlimit_nofile (context, NULL);
+
+  if (!meta_context_start (context, &error))
+    {
+      g_printerr ("GNOME Shell failed to start: %s", error->message);
+      return EXIT_FAILURE;
+    }
+
+  if (!meta_context_run_main_loop (context, &error))
+    {
+      g_printerr ("GNOME Shell terminated with an error: %s", error->message);
+      ecode = EXIT_FAILURE;
+    }
+
+  meta_context_destroy (g_steal_pointer (&context));
+
+  shell_profiler_shutdown ();
+
+#if 0
+  g_debug ("Doing final cleanup");
+  _shell_global_destroy_gjs_context (shell_global_get ());
+  g_object_unref (shell_global_get ());
+#endif
+
+  return ecode;
+}