Add m-esr52 at 52.6.0

1 files changed, 20 insertions, 0 deletions

diff --git a/js/src/gdb/tests/test-Root-null.py b/js/src/gdb/tests/test-Root-null.py
new file mode 100644
index 000000000..9abf2e801
--- /dev/null
+++ b/js/src/gdb/tests/test-Root-null.py
@@ -0,0 +1,20 @@
+# Test printing roots that refer to NULL pointers.
+
+# Since mozilla.prettyprinters.Pointer declines to create pretty-printers
+# for null pointers, GDB built-in printing code ends up handling them. But
+# as of 2012-11, GDB suppresses printing pointers in replacement values:
+# see: http://sourceware.org/ml/gdb/2012-11/msg00055.html
+#
+# Thus, if the pretty-printer for JS::Rooted simply returns the referent as
+# a replacement value (which seems reasonable enough, if you want the
+# pretty-printer to be completely transparent), and the referent is a null
+# pointer, it prints as nothing at all.
+#
+# This test ensures that the JS::Rooted pretty-printer doesn't make that
+# mistake.
+
+gdb.execute('set print address on')
+
+run_fragment('Root.null')
+
+assert_pretty('null', '0x0')