libsysprof-profile: add address mappings parser

This parses the contents of /proc/$pid/maps and has a crude helper to test
it against real world files (which found a missing capture we had).

src/libsysprof-profile/tests/meson.build

@@ -12,6 +12,7 @@ libsysprof_profile_testsuite_c_args = [
 ]
 
 libsysprof_profile_testsuite = {
+  'test-maps-parser' : {'skip': true},
   'test-profiler' : {'skip': true},
 }
 

src/libsysprof-profile/tests/test-maps-parser.c

@@ -0,0 +1,51 @@
+/* test-maps-parser.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-maps-parser-private.h"
+
+#define ADDR_FORMAT "0x%"G_GINT64_MODIFIER"x"
+
+int
+main (int argc,
+      char *argv[])
+{
+  g_autoptr(GError) error = NULL;
+  g_autofree char *contents = NULL;
+  SysprofMapsParser parser;
+  guint64 begin, end, offset, inode;
+  char *file;
+  gsize len;
+
+  g_assert_cmpint (argc, >, 1);
+  g_file_get_contents (argv[1], &contents, &len, &error);
+  g_assert_no_error (error);
+
+  sysprof_maps_parser_init (&parser, contents, len);
+  while (sysprof_maps_parser_next (&parser, &begin, &end, &offset, &inode, &file))
+    {
+      g_print (ADDR_FORMAT" - "ADDR_FORMAT" "ADDR_FORMAT" %"G_GUINT64_FORMAT" %s\n",
+               begin, end, offset, inode, file);
+      g_free (file);
+    }
+
+  return 0;
+}