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      1 # Copyright 2025 Free Software Foundation, Inc.
      2 
      3 # This program is free software; you can redistribute it and/or modify
      4 # it under the terms of the GNU General Public License as published by
      5 # the Free Software Foundation; either version 3 of the License, or
      6 # (at your option) any later version.
      7 #
      8 # This program is distributed in the hope that it will be useful,
      9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
     10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     11 # GNU General Public License for more details.
     12 #
     13 # You should have received a copy of the GNU General Public License
     14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
     15 
     16 # Print std::string::npos using c++ pretty-printer.  Todo: convert this to a
     17 # DWARF assembly test-case, such that the regression test also works for clang.
     18 
     19 standard_testfile .cc
     20 
     21 set opts {}
     22 lappend opts debug
     23 lappend opts c++
     24 if {[have_compile_flag -fno-eliminate-unused-debug-symbols]} {
     25     lappend opts additional_flags=-fno-eliminate-unused-debug-symbols
     26     # Work around clang warning -Wunused-command-line-argument.
     27     lappend opts nowarnings
     28 }
     29 
     30 if {[prepare_for_testing "failed to prepare" $testfile $srcfile $opts]} {
     31     return
     32 }
     33 
     34 gdb_test_no_output "source $srcdir/$subdir/pretty-print.py" \
     35     "load libstdc++ pretty printers"
     36 
     37 gdb_test_no_output \
     38     "python register_type_printers(gdb.current_objfile())" \
     39     "register libstdc++ pretty printers"
     40 
     41 gdb_test "whatis std::string" \
     42     "std::string"
     43 
     44 # Regression test for PR c++/33480.  GDB used to hang, at least if the GDB
     45 # build optimization flags triggered some uninitialized variables in the right
     46 # way.  I was not able to reproduce the hang with clang, due to different
     47 # debug info.
     48 #
     49 # Prints different strings due to different debug info:
     50 # - std::string::size_type with gcc, and
     51 # - size_type with clang
     52 gdb_test "whatis std::string::npos" \
     53     "(std::string::)?size_type"
     54