libsysprof-analyze: add overlay mountinfo parsing test

This just ensures that we can parse the contents of the superblock options
that we get for "overlay" mounts via toolbox/podman. These still need to
be handled from SysprofMountNamespace when translating though.

Additionally, this stuff seems very brittle for parsing, unless it is
getting escaped somewhere I'm missing currently.

src/libsysprof-analyze/tests/meson.build

@@ -17,6 +17,7 @@ libsysprof_analyze_testsuite = {
   'test-list-counters'       : {'skip': true},
   'test-list-files'          : {'skip': true},
   'test-list-jitmap'         : {'skip': true},
+  'test-list-overlays'       : {'skip': true},
   'test-print-file'          : {'skip': true},
   'test-list-processes'      : {'skip': true},
   'test-list-address-layout' : {'skip': true},

src/libsysprof-analyze/tests/test-list-overlays.c

@@ -0,0 +1,107 @@
+/* test-list-overlays.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 <sysprof-analyze.h>
+
+#include "sysprof-document-private.h"
+
+int
+main (int   argc,
+      char *argv[])
+{
+  g_autoptr(SysprofDocumentLoader) loader  = NULL;
+  g_autoptr(SysprofDocument) document = NULL;
+  g_autoptr(GListModel) processes = NULL;
+  g_autoptr(GError) error = NULL;
+  guint n_items;
+  int pid = -1;
+
+  if (argc < 2)
+    {
+      g_printerr ("usage: %s CAPTURE_FILE [PID]\n", argv[0]);
+      return 1;
+    }
+
+  if (argc == 3)
+    pid = atoi (argv[2]);
+
+  loader = sysprof_document_loader_new (argv[1]);
+  sysprof_document_loader_set_symbolizer (loader, sysprof_no_symbolizer_get ());
+
+  if (!(document = sysprof_document_loader_load (loader, NULL, &error)))
+    {
+      g_printerr ("Failed to open capture: %s\n", error->message);
+      return 1;
+    }
+
+  processes = sysprof_document_list_processes (document);
+  n_items = g_list_model_get_n_items (processes);
+
+  for (guint i = 0; i < n_items; i++)
+    {
+      g_autoptr(SysprofDocumentProcess) process = g_list_model_get_item (processes, i);
+      g_autoptr(GListModel) mounts = sysprof_document_process_list_mounts (process);
+      g_autoptr(GString) str = g_string_new (NULL);
+      guint n_mounts;
+
+      if (pid != -1 && pid != sysprof_document_frame_get_pid (SYSPROF_DOCUMENT_FRAME (process)))
+        continue;
+
+      n_mounts = g_list_model_get_n_items (mounts);
+      for (guint j = 0; j < n_mounts; j++)
+        {
+          g_autoptr(SysprofMount) mount = g_list_model_get_item (mounts, j);
+          const char *fs_type = sysprof_mount_get_filesystem_type (mount);
+          const char *value;
+
+          if (g_strcmp0 (fs_type, "overlay") == 0)
+            g_string_append_printf (str,
+                                    "  @ID(%d) @ROOT(%s) @MOUNT_POINT(%s) @MOUNT_SOURCE(%s) @FS_TYPE(%s) @OPTIONS(%s)\n",
+                                    sysprof_mount_get_mount_id (mount),
+                                    sysprof_mount_get_root (mount),
+                                    sysprof_mount_get_mount_point (mount),
+                                    sysprof_mount_get_mount_source (mount),
+                                    sysprof_mount_get_filesystem_type (mount),
+                                    sysprof_mount_get_superblock_options (mount));
+
+          if ((value = sysprof_mount_get_superblock_option (mount, "lowerdir")))
+            {
+              g_auto(GStrv) split = g_strsplit (value, ":", 0);
+
+              g_string_append_printf (str, "      LOWER: %s\n", value);
+              for (guint k = 0; split[k]; k++)
+                g_string_append_printf (str, "        [%d]: %s\n", k, split[k]);
+            }
+
+          if ((value = sysprof_mount_get_superblock_option (mount, "upperdir")))
+            g_string_append_printf (str, "      UPPER: %s\n", value);
+
+          if ((value = sysprof_mount_get_superblock_option (mount, "workdir")))
+            g_string_append_printf (str, "    WORKDIR: %s\n", value);
+        }
+
+      if (str->len > 0)
+        g_print ("%d:\n%s",
+                 sysprof_document_frame_get_pid (SYSPROF_DOCUMENT_FRAME (process)),
+                 str->str);
+    }
+
+  return 0;
+}