libsysprof-gtk: start on GTK widgetry library

This is ultimately to replace libsysprof-ui, and will focus on the display
of capture files. Recording will be left to the sysprof application in
terms of UI, and other applications like IDEs will use the
libsysprof-profile API directly along with libsysprof-gtk for visualizing.

src/libsysprof-gtk/tests/meson.build

@@ -0,0 +1,31 @@
+libsysprof_gtk_test_env = [
+  'G_DEBUG=gc-friendly',
+  'GSETTINGS_BACKEND=memory',
+  'MALLOC_CHECK_=2',
+]
+
+libsysprof_gtk_testsuite_c_args = [
+  '-DG_LOG_DOMAIN="libdex"',
+  '-DG_ENABLE_DEBUG',
+  '-UG_DISABLE_ASSERT',
+  '-UG_DISABLE_CAST_CHECKS',
+]
+
+libsysprof_gtk_testsuite = {
+  'test-callgraph' : {'skip': true},
+}
+
+libsysprof_gtk_testsuite_deps = [
+  libsysprof_analyze_static_dep,
+  libsysprof_gtk_static_dep,
+]
+
+foreach test, params: libsysprof_gtk_testsuite
+  test_exe = executable(test, '@0@.c'.format(test),
+          c_args: libsysprof_gtk_testsuite_c_args,
+    dependencies: libsysprof_gtk_testsuite_deps,
+  )
+  if not params.get('skip', false)
+    test(test, test_exe, env: libsysprof_gtk_test_env)
+  endif
+endforeach

src/libsysprof-gtk/tests/test-callgraph.c

@@ -0,0 +1,112 @@
+/* test-callgraph.c
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.com>
+ *
+ * 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/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+#include <sysprof-analyze.h>
+#include <sysprof-gtk.h>
+
+static GMainLoop *main_loop;
+static char *kallsyms_path;
+static char *filename;
+static const GOptionEntry entries[] = {
+  { "kallsyms", 'k', 0, G_OPTION_ARG_FILENAME, &kallsyms_path, "The path to kallsyms to use for decoding", "PATH" },
+  { 0 }
+};
+
+int
+main (int   argc,
+      char *argv[])
+{
+  g_autoptr(GOptionContext) context = g_option_context_new ("- show a callgraph");
+  g_autoptr(SysprofDocumentLoader) loader = NULL;
+  g_autoptr(SysprofDocument) document = NULL;
+  g_autoptr(SysprofMultiSymbolizer) multi = NULL;
+  g_autoptr(GListModel) model = NULL;
+  g_autoptr(GError) error = NULL;
+  SysprofCallgraphView *view;
+  GtkWindow *window;
+
+  gtk_init ();
+  sysprof_clock_init ();
+
+  g_option_context_add_main_entries (context, entries, NULL);
+  if (!g_option_context_parse (context, &argc, &argv, &error))
+    {
+      g_printerr ("%s\n", error->message);
+      return 1;
+    }
+
+  if (argc != 2)
+    {
+      g_print ("usage: %s [OPTIONS] CAPTURE_FILE\n", argv[0]);
+      return 1;
+    }
+
+  filename = argv[1];
+
+  main_loop = g_main_loop_new (NULL, FALSE);
+
+  multi = sysprof_multi_symbolizer_new ();
+
+  if (kallsyms_path)
+    {
+      g_autoptr(GFile) kallsyms_file = g_file_new_for_path (kallsyms_path);
+      GFileInputStream *kallsyms_stream = g_file_read (kallsyms_file, NULL, NULL);
+
+      sysprof_multi_symbolizer_take (multi, sysprof_kallsyms_symbolizer_new_for_symbols (G_INPUT_STREAM (kallsyms_stream)));
+    }
+  else
+    {
+      sysprof_multi_symbolizer_take (multi, sysprof_kallsyms_symbolizer_new ());
+    }
+
+  sysprof_multi_symbolizer_take (multi, sysprof_elf_symbolizer_new ());
+  sysprof_multi_symbolizer_take (multi, sysprof_jitmap_symbolizer_new ());
+
+  loader = sysprof_document_loader_new (filename);
+  sysprof_document_loader_set_symbolizer (loader, SYSPROF_SYMBOLIZER (multi));
+
+  g_print ("Loading %s, ignoring embedded symbols...\n", filename);
+  if (!(document = sysprof_document_loader_load (loader, NULL, &error)))
+    g_error ("Failed to load document: %s", error->message);
+
+  model = sysprof_document_list_samples (document);
+
+  window = g_object_new (GTK_TYPE_WINDOW,
+                         "default-width", 800,
+                         "default-height", 600,
+                         NULL);
+  view = g_object_new (SYSPROF_TYPE_WEIGHTED_CALLGRAPH_VIEW,
+                       "traceables", model,
+                       "document", document,
+                       NULL);
+  g_signal_connect_swapped (window,
+                            "close-request",
+                            G_CALLBACK (g_main_loop_quit),
+                            main_loop);
+  gtk_window_set_child (window, GTK_WIDGET (view));
+  gtk_window_present (window);
+
+  g_main_loop_run (main_loop);
+
+  return 0;
+}