1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/gdb/tests/test-Root-null.py Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,20 @@
1.4 +# Test printing roots that refer to NULL pointers.
1.5 +
1.6 +# Since mozilla.prettyprinters.Pointer declines to create pretty-printers
1.7 +# for null pointers, GDB built-in printing code ends up handling them. But
1.8 +# as of 2012-11, GDB suppresses printing pointers in replacement values:
1.9 +# see: http://sourceware.org/ml/gdb/2012-11/msg00055.html
1.10 +#
1.11 +# Thus, if the pretty-printer for JS::Rooted simply returns the referent as
1.12 +# a replacement value (which seems reasonable enough, if you want the
1.13 +# pretty-printer to be completely transparent), and the referent is a null
1.14 +# pointer, it prints as nothing at all.
1.15 +#
1.16 +# This test ensures that the JS::Rooted pretty-printer doesn't make that
1.17 +# mistake.
1.18 +
1.19 +gdb.execute('set print address on')
1.20 +
1.21 +run_fragment('Root.null')
1.22 +
1.23 +assert_pretty('null', '0x0')
