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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 | 20 |
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') |