1 files changed, 35 insertions, 0 deletions
diff --git a/toolkit/library/libxul.so-gdb.py b/toolkit/library/libxul.so-gdb.py
new file mode 100644
index 0000000000..d84aead1c3
--- /dev/null
+++ b/toolkit/library/libxul.so-gdb.py
@@ -0,0 +1,35 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+""" GDB Python customization auto-loader for libxul """
+
+import re
+from os.path import abspath, dirname, exists
+
+# Add the toplevel objdir to the gdb source search path.
+
+# In development builds, $objdir/dist/bin/libxul.so is a symlink to
+# $objdir/toolkit/library/build/libxul.so, and the latter path is what gdb uses
+# to search for gdb scripts.
+#
+# For artifact builds, libxul.so will be a regular file in $objdir/dist/bin.
+# Look both places.
+
+libxul_dir = dirname(__file__)
+objdir = None
+for relpath in ("../../..", "../.."):
+    objdir = abspath(libxul_dir + "/" + relpath)
+    if exists(objdir + "/build/.gdbinit"):
+        break
+else:
+    gdb.write("Warning: Gecko objdir not found\n")
+
+if objdir is not None:
+    m = re.search(r"[\w ]+: (.*)", gdb.execute("show dir", False, True))
+    if m and objdir not in m.group(1).split(":"):
+        gdb.execute("set dir {}:{}".format(objdir, m.group(1)))
+
+    # When running from a random directory, the toplevel Gecko .gdbinit may
+    # not have been loaded. Load it now.
+    gdb.execute("source -s build/.gdbinit.loader")