From aa15623fe68b3151ed54a7365b5a5226b538851a Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Thu, 31 Aug 2023 13:01:00 -0600 Subject: Allow pretty-printer 'children' method to return strings A user noticed that, while a pretty-printer can return Python strings from its "children" method, this does not really work for MI. I tracked this down to my_value_of_variable calling into c_value_of_variable, which specially handles arrays and structures -- not using the actual contents of the string. Now, this part of MI seems bad to me, but rather than change that, this applies the fix to only dynamic varobjs, which is the only scenario where a string like this can really be returned. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=18282 Reviewed-by: Keith Seitz --- gdb/testsuite/gdb.python/py-varobj.py | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 gdb/testsuite/gdb.python/py-varobj.py (limited to 'gdb/testsuite/gdb.python/py-varobj.py') diff --git a/gdb/testsuite/gdb.python/py-varobj.py b/gdb/testsuite/gdb.python/py-varobj.py new file mode 100644 index 0000000..bc31a19 --- /dev/null +++ b/gdb/testsuite/gdb.python/py-varobj.py @@ -0,0 +1,35 @@ +# Copyright (C) 2023 Free Software Foundation, Inc. +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +import gdb.printing + + +class TestPrinter: + def __init__(self, val): + self.val = val + + def to_string(self): + return "map" + + def children(self): + yield "1", "flicker" + + +def str_lookup_function(val): + lookup_tag = val.type.tag + if lookup_tag == "test": + return TestPrinter(val) + + +gdb.printing.register_pretty_printer(None, str_lookup_function) -- cgit v1.1