1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/gdb/lib-for-tests/catcher.py b/js/src/gdb/lib-for-tests/catcher.py
new file mode 100644
index 0000000000..8ef3529255
--- /dev/null
+++ b/js/src/gdb/lib-for-tests/catcher.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/.
+
+# Apparently, there's simply no way to ask GDB to exit with a non-zero
+# status when the script run with the --eval-command option fails. Thus, if
+# we have --eval-command run prologue.py directly, syntax errors there will
+# lead GDB to exit with no indication anything went wrong.
+#
+# To avert that, we use this very small launcher script to run prologue.py
+# and catch errors.
+#
+# Remember, errors in this file will cause spurious passes, so keep this as
+# simple as possible!
+# flake8: noqa: F821
+
+import os
+import sys
+import traceback
+
+
+def execfile(filename, globs, locs):
+    with open(filename) as f:
+        code = compile(f.read(), filename, "exec")
+        exec(code, globs, locs)
+
+
+try:
+    # testlibdir is set on the GDB command line, via:
+    # --eval-command python testlibdir=...
+    execfile(os.path.join(testlibdir, "prologue.py"), globals(), locals())
+except Exception as err:
+    sys.stderr.write("Error running GDB prologue:\n")
+    traceback.print_exc()
+    sys.exit(1)