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Diffstat (limited to 'js/src/gdb/tests/test-Root-null.py')
| -rw-r--r-- | js/src/gdb/tests/test-Root-null.py | 21 |
1 files changed, 21 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 0000000000..839fa069c5 --- /dev/null +++ b/js/src/gdb/tests/test-Root-null.py @@ -0,0 +1,21 @@ +# 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. +# flake8: noqa: F821 + +gdb.execute("set print address on") + +run_fragment("Root.null") + +assert_pretty("null", "0x0") |