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/sysprof-maps-parser-private.h

@@ -0,0 +1,44 @@
+/* sysprof-maps-parser-private.h
+ *
+ * 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
+ */
+
+#pragma once
+
+#include <glib.h>
+
+#include "line-reader-private.h"
+
+G_BEGIN_DECLS
+
+typedef struct _SysprofMapsParser
+{
+  LineReader reader;
+} SysprofMapsParser;
+
+void     sysprof_maps_parser_init (SysprofMapsParser *self,
+                                   const char         *str,
+                                   gssize              len);
+gboolean sysprof_maps_parser_next (SysprofMapsParser  *self,
+                                   guint64            *out_begin_addr,
+                                   guint64            *out_end_addr,
+                                   guint64            *out_offset,
+                                   guint64            *out_inode,
+                                   char              **out_filename);
+
+G_END_DECLS