2 files changed, 79 insertions, 0 deletions
diff --git a/util/Makefile.objs b/util/Makefile.objs
index 6718a38b61..fe339c2636 100644
--- a/util/Makefile.objs
+++ b/util/Makefile.objs
@@ -63,3 +63,4 @@ util-obj-y += guest-random.o
 util-obj-$(CONFIG_GIO) += dbus.o
 dbus.o-cflags = $(GIO_CFLAGS)
 dbus.o-libs = $(GIO_LIBS)
+util-obj-$(CONFIG_USER_ONLY) += selfmap.o
diff --git a/util/selfmap.c b/util/selfmap.c
new file mode 100644
index 0000000000..2ec99dfdda
--- /dev/null
+++ b/util/selfmap.c
@@ -0,0 +1,78 @@
+/*
+ * Utility function to get QEMU's own process map
+ *
+ * Copyright (c) 2020 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "qemu/selfmap.h"
+
+GSList *read_self_maps(void)
+{
+    gchar *maps;
+    GSList *map_info = NULL;
+
+    if (g_file_get_contents("/proc/self/maps", &maps, NULL, NULL)) {
+        gchar **lines = g_strsplit(maps, "\n", 0);
+        int i, entries = g_strv_length(lines);
+
+        for (i = 0; i < entries; i++) {
+            gchar **fields = g_strsplit(lines[i], " ", 6);
+            if (g_strv_length(fields) > 4) {
+                MapInfo *e = g_new0(MapInfo, 1);
+                int errors;
+                const char *end;
+
+                errors  = qemu_strtoul(fields[0], &end, 16, &e->start);
+                errors += qemu_strtoul(end + 1, NULL, 16, &e->end);
+
+                e->is_read  = fields[1][0] == 'r';
+                e->is_write = fields[1][1] == 'w';
+                e->is_exec  = fields[1][2] == 'x';
+                e->is_priv  = fields[1][3] == 'p';
+
+                errors += qemu_strtoul(fields[2], NULL, 16, &e->offset);
+                e->dev = g_strdup(fields[3]);
+                errors += qemu_strtou64(fields[4], NULL, 10, &e->inode);
+
+                /*
+                 * The last field may have leading spaces which we
+                 * need to strip.
+                 */
+                if (g_strv_length(fields) == 6) {
+                    e->path = g_strdup(g_strchug(fields[5]));
+                }
+                map_info = g_slist_prepend(map_info, e);
+            }
+
+            g_strfreev(fields);
+        }
+        g_strfreev(lines);
+        g_free(maps);
+    }
+
+    /* ensure the map data is in the same order we collected it */
+    return g_slist_reverse(map_info);
+}
+
+/**
+ * free_self_maps:
+ * @info: a GSlist
+ *
+ * Free a list of MapInfo structures.
+ */
+static void free_info(gpointer data)
+{
+    MapInfo *e = (MapInfo *) data;
+    g_free(e->dev);
+    g_free(e->path);
+    g_free(e);
+}
+
+void free_self_maps(GSList *info)
+{
+    g_slist_free_full(info, &free_info);
+}