libsysprof: add a tool to list allocations by function (and children)

src/libsysprof/tests/meson.build

@@ -12,6 +12,7 @@ libsysprof_testsuite_c_args = [
 
 libsysprof_testsuite = {
   'read-build-id'            : {'skip': true},
+  'test-allocs-by-func'      : {'skip': true},
   'test-callgraph'           : {'skip': true},
   'test-capture-model'       : {'skip': true},
   'test-elf-loader'          : {'skip': true},

src/libsysprof/tests/test-allocs-by-func.c

@@ -0,0 +1,157 @@
+/* test-allocs-by-func.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 <glib/gi18n.h>
+#include <locale.h>
+
+#include <sysprof.h>
+
+typedef struct _Augment
+{
+  guint64 total_allocs;
+} Augment;
+
+static int
+sort_by_augment (gconstpointer a,
+                 gconstpointer b)
+{
+  SysprofCallgraphSymbol *sym_a = *(SysprofCallgraphSymbol **)a;
+  SysprofCallgraphSymbol *sym_b = *(SysprofCallgraphSymbol **)b;
+  Augment *aug_a = sysprof_callgraph_symbol_get_summary_augment (sym_a);
+  Augment *aug_b = sysprof_callgraph_symbol_get_summary_augment (sym_b);
+
+  if (aug_a->total_allocs > aug_b->total_allocs)
+    return -1;
+  if (aug_a->total_allocs < aug_b->total_allocs)
+    return 1;
+
+  return 0;
+}
+
+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;
+  g_autoptr(GPtrArray) ar = 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);
+  ar = g_ptr_array_new_with_free_func (g_object_unref);
+
+  g_printerr ("Sorting by total allocation...\n");
+  for (guint i = 0; i < n_items; i++)
+    g_ptr_array_add (ar, g_list_model_get_item (symbols, i));
+  g_ptr_array_sort (ar, sort_by_augment);
+
+  g_printerr ("Listing...\n");
+
+  for (guint i = 0; i < ar->len; i++)
+    {
+      SysprofCallgraphSymbol *sym = g_ptr_array_index (ar, i);
+      SysprofSymbol *symbol = sysprof_callgraph_symbol_get_symbol (sym);
+      Augment *aug = sysprof_callgraph_symbol_get_summary_augment (sym);
+      g_autofree char *total_size = g_format_size (aug->total_allocs);
+
+      g_print ("%10s : %s\n",
+               total_size,
+               sysprof_symbol_get_name (symbol));
+    }
+
+  g_main_loop_quit (main_loop);
+}
+
+static void
+augment_cb (SysprofCallgraph     *callgraph,
+            SysprofCallgraphNode *node,
+            SysprofDocumentFrame *frame,
+            gboolean              summarize,
+            gpointer              user_data)
+{
+  Augment *aug;
+  guint64 size;
+
+  g_assert (SYSPROF_IS_CALLGRAPH (callgraph));
+  g_assert (node != NULL);
+  g_assert (SYSPROF_IS_DOCUMENT_ALLOCATION (frame));
+  g_assert (user_data == NULL);
+
+  size = sysprof_document_allocation_get_size (SYSPROF_DOCUMENT_ALLOCATION (frame));
+  if (size == 0)
+    return;
+
+  for (; node; node = sysprof_callgraph_node_parent (node))
+    {
+      aug = sysprof_callgraph_get_summary_augment (callgraph, node);
+      aug->total_allocs += size;
+    }
+}
+
+int
+main (int   argc,
+      char *argv[])
+{
+  g_autoptr(GMainLoop) main_loop = g_main_loop_new (NULL, FALSE);
+  g_autoptr(SysprofDocumentLoader) loader = NULL;
+  g_autoptr(SysprofDocument) document = NULL;
+  g_autoptr(GListModel) allocs = NULL;
+  g_autoptr(GError) error = NULL;
+  SysprofCallgraphFlags flags = 0;
+
+  setlocale (LC_ALL, "");
+  bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+  textdomain (GETTEXT_PACKAGE);
+
+  if (argc < 2)
+    g_error ("usage: %s CAPTURE_FILE", argv[0]);
+
+  g_printerr ("Loading document...\n");
+  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);
+
+  allocs = sysprof_document_list_allocations (document);
+
+  g_printerr ("Generating callgraph...\n");
+  sysprof_document_callgraph_async (document,
+                                    flags,
+                                    allocs,
+                                    sizeof (Augment),
+                                    augment_cb, NULL, NULL,
+                                    NULL,
+                                    callgraph_cb,
+                                    main_loop);
+
+  g_main_loop_run (main_loop);
+
+  return 0;
+}