libsysprof: add helper to list functions by sample hits

src/libsysprof/tests/meson.build

@@ -11,27 +11,28 @@ libsysprof_testsuite_c_args = [
 ]
 
 libsysprof_testsuite = {
-  'read-build-id'            : {'skip': true},
+  'read-build-id'                 : {'skip': true},
-  'ninja-to-marks'           : {'skip': true},
+  'ninja-to-marks'                : {'skip': true},
-  'test-allocs-by-func'      : {'skip': true},
+  'test-allocs-by-func'           : {'skip': true},
-  'test-callgraph'           : {'skip': true},
+  'test-callgraph'                : {'skip': true},
-  'test-capture-model'       : {'skip': true},
+  'test-capture-model'            : {'skip': true},
-  'test-elf-loader'          : {'skip': true},
+  'test-elf-loader'               : {'skip': true},
-  'test-leak-detector'       : {'skip': true},
+  'test-leak-detector'            : {'skip': true},
-  'test-list-counters'       : {'skip': true},
+  'test-list-counters'            : {'skip': true},
-  'test-list-cpu'            : {'skip': true},
+  'test-list-cpu'                 : {'skip': true},
-  'test-list-files'          : {'skip': true},
+  'test-list-files'               : {'skip': true},
-  'test-list-jitmap'         : {'skip': true},
+  'test-list-functions-by-weight' : {'skip': true},
-  'test-list-overlays'       : {'skip': true},
+  'test-list-jitmap'              : {'skip': true},
-  'test-maps-parser'         : {'skip': true},
+  'test-list-overlays'            : {'skip': true},
-  'test-mark-catalog'        : {'skip': true},
+  'test-maps-parser'              : {'skip': true},
-  'test-print-file'          : {'skip': true},
+  'test-mark-catalog'             : {'skip': true},
-  'test-profiler'            : {'skip': true},
+  'test-print-file'               : {'skip': true},
-  'test-list-processes'      : {'skip': true},
+  'test-profiler'                 : {'skip': true},
-  'test-list-address-layout' : {'skip': true},
+  'test-list-processes'           : {'skip': true},
-  'test-symbolize'           : {'skip': true},
+  'test-list-address-layout'      : {'skip': true},
-  'test-strings'             : {},
+  'test-symbolize'                : {'skip': true},
-  'test-symbol-cache'        : {},
+  'test-strings'                  : {},
+  'test-symbol-cache'             : {},
 }
 
 libsysprof_testsuite_deps = [

src/libsysprof/tests/test-list-functions-by-weight.c

@@ -0,0 +1,134 @@
+/* test-list-functions-by-weight.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 <sysprof.h>
+
+#include "sysprof-callgraph-private.h"
+
+typedef struct _Augment
+{
+  guint64 count;
+} Augment;
+
+static gboolean
+seen_symbol (const SysprofCallgraphNode *node,
+             const SysprofCallgraphNode *toplevel)
+{
+  for (const SysprofCallgraphNode *iter = toplevel;
+       iter != node;
+       iter = iter->parent)
+    if (iter->summary == node->summary)
+      return TRUE;
+  return FALSE;
+}
+
+static void
+augment_cb (SysprofCallgraph     *callgraph,
+            SysprofCallgraphNode *node,
+            SysprofDocumentFrame *frame,
+            gboolean              summarize,
+            gpointer              user_data)
+{
+  Augment *aug = sysprof_callgraph_get_summary_augment (callgraph, node);
+
+  aug->count++;
+
+  for (SysprofCallgraphNode *iter = node->parent; iter; iter = iter->parent)
+    {
+      if (!seen_symbol (iter, node))
+        {
+          aug = sysprof_callgraph_get_summary_augment (callgraph, iter);
+          aug->count++;
+        }
+    }
+}
+
+static void
+callgraph_cb (GObject      *object,
+              GAsyncResult *result,
+              gpointer      user_data)
+{
+  SysprofDocument *document = SYSPROF_DOCUMENT (object);
+  GMainLoop *main_loop = user_data;
+  g_autoptr(GError) error = NULL;
+  g_autoptr(SysprofCallgraph) callgraph = sysprof_document_callgraph_finish (document, result, &error);
+  g_autoptr(GListModel) symbols = NULL;
+  guint n_items;
+
+  g_assert_no_error (error);
+  g_assert_true (SYSPROF_IS_CALLGRAPH (callgraph));
+
+  symbols = sysprof_callgraph_list_symbols (callgraph);
+  n_items = g_list_model_get_n_items (symbols);
+
+  for (guint i = 0; i < n_items; i++)
+    {
+      g_autoptr(SysprofCallgraphSymbol) symbol = g_list_model_get_item (symbols, i);
+      Augment *aug = sysprof_callgraph_symbol_get_summary_augment (symbol);
+      const char *name = sysprof_symbol_get_name (sysprof_callgraph_symbol_get_symbol (symbol));
+
+      g_print ("%6"G_GINT64_FORMAT": %s\n", aug->count, name);
+    }
+
+  g_main_loop_quit (main_loop);
+}
+
+int
+main (int   argc,
+      char *argv[])
+{
+  g_autoptr(GOptionContext) context = g_option_context_new ("- list functions sorted by weight");
+  g_autoptr(GMainLoop) main_loop = g_main_loop_new (NULL, FALSE);
+  g_autoptr(SysprofDocumentLoader) loader = NULL;
+  g_autoptr(SysprofDocument) document = NULL;
+  g_autoptr(GListModel) samples = NULL;
+  g_autoptr(GError) error = NULL;
+  SysprofCallgraphFlags flags = 0;
+
+  if (!g_option_context_parse (context, &argc, &argv, &error))
+    g_error ("%s", error->message);
+
+  if (argc < 2)
+    {
+      g_printerr ("usage: %s CAPTURE_FILE", argv[0]);
+      return 1;
+    }
+
+  loader = sysprof_document_loader_new (argv[1]);
+  if (!(document = sysprof_document_loader_load (loader, NULL, &error)))
+    g_error ("Failed to load document: %s", error->message);
+
+  samples = sysprof_document_list_samples (document);
+
+  sysprof_document_callgraph_async (document,
+                                    flags,
+                                    samples,
+                                    sizeof (Augment),
+                                    augment_cb, NULL, NULL,
+                                    NULL,
+                                    callgraph_cb,
+                                    main_loop);
+
+  g_main_loop_run (main_loop);
+
+  return 0;
+}