gdb/testsuite/gdb.cp/pretty-print.exp

# Copyright 2025 Free Software Foundation, Inc.

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# Print std::string::npos using c++ pretty-printer.  Todo: convert this to a
# DWARF assembly test-case, such that the regression test also works for clang.

standard_testfile .cc

set opts {}
lappend opts debug
lappend opts c++
if {[have_compile_flag -fno-eliminate-unused-debug-symbols]} {
    lappend opts additional_flags=-fno-eliminate-unused-debug-symbols
    # Work around clang warning -Wunused-command-line-argument.
    lappend opts nowarnings
}

if {[prepare_for_testing "failed to prepare" $testfile $srcfile $opts]} {
    return
}

gdb_test_no_output "source $srcdir/$subdir/pretty-print.py" \
    "load libstdc++ pretty printers"

gdb_test_no_output \
    "python register_type_printers(gdb.current_objfile())" \
    "register libstdc++ pretty printers"

gdb_test "whatis std::string" \
    "std::string"

# Regression test for PR c++/33480.  GDB used to hang, at least if the GDB
# build optimization flags triggered some uninitialized variables in the right
# way.  I was not able to reproduce the hang with clang, due to different
# debug info.
#
# Prints different strings due to different debug info:
# - std::string::size_type with gcc, and
# - size_type with clang
gdb_test "whatis std::string::npos" \
    "(std::string::)?size_type"