gdb/testsuite/gdb.linespec/cp-replace-typedefs-ns-template.exp

# Copyright 2020-2021 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 <http://www.gnu.org/licenses/>.

# This file tests GDB's ability to replace typedefs in C++ symbols
# when setting breakpoints, particularly around templates in
# namespaces.

load_lib completion-support.exp

standard_testfile .cc

if {[prepare_for_testing "failed to prepare" $testfile $srcfile \
	 {debug c++ additional_flags=-std=c++11}]} {
    return -1
}

# Disable the completion limit for the whole testcase.
gdb_test_no_output "set max-completions unlimited"

# Confirm that the important global namespace typedefs were indeed
# emited in the debug info.
gdb_test "ptype NS2" "type = int"
gdb_test "ptype object" "type = struct NS1::NS2::object {.*"
gdb_test "ptype Templ1" "type = struct NS1::NS2::Templ1<unsigned int> .*"
gdb_test "ptype AliasTempl" "type = struct NS1::NS2::Templ2<int, int> .*"

# Wrapper around check_bp_locations_match_list that expect a single
# location in the set breakpoint, instead of a list of locations.  If
# the set location isn't specified, then it is assumed to be the exact
# same as the input location.
proc check_bp {location_in {location_out ""}} {
    if {$location_out == ""} {
	set location_out $location_in
    }
    check_bp_locations_match_list "b $location_in" [list $location_out]
}

# These used to crash GDB with infinite recursion because GDB would
# confuse the "Templ1" typedef in the global namespace with the "Templ1"
# template in within NS1::NS2.
test_gdb_complete_unique \
    "break NS1::NS2::Templ1<int>::Tem" \
    "break NS1::NS2::Templ1<int>::Templ1(NS1::NS2::object*)"
check_bp "NS1::NS2::Templ1<int>::Templ1(NS1::NS2::object*)"

# Similar test, but without a template.  This would not crash.
test_gdb_complete_unique \
    "break NS1::NS2::object::obj" \
    "break NS1::NS2::object::object()"
check_bp "NS1::NS2::object::object()"

# Test some non-template typedef replacing within a namespace.
test_gdb_complete_unique \
    "break NS1::NS2::object_p_f" \
    "break NS1::NS2::object_p_func(NS1::NS2::object*)"
check_bp \
    "NS1::NS2::object_p_func(NS1::NS2::object_p)" \
    "NS1::NS2::object_p_func(NS1::NS2::object*)"

# Make sure the "NS2" in the template argument list is resolved as
# being a global typedef for int.
foreach loc {
    "NS1::NS2::Templ1<int>::static_method<int>(NS1::NS2::object*)"
    "NS1::NS2::Templ1<int>::static_method<NS2>(NS1::NS2::object*)"
    "NS1::NS2::Templ1<NS2>::static_method<int>(NS1::NS2::object*)"
    "NS1::NS2::Templ1<NS2>::static_method<NS2>(NS1::NS2::object*)"
} {
    check_bp $loc "NS1::NS2::Templ1<int>::static_method<int>(NS1::NS2::object*)"
}

foreach loc {
    "NS1::NS2::Templ2<int, int>::static_method<int>(NS1::NS2::object*)"
    "NS1::NS2::Templ2<int, int>::static_method<int>(NS1::NS2::object_p)"
} {
    check_bp $loc "NS1::NS2::Templ2<int, int>::static_method<int>(NS1::NS2::object*)"
}

# Check that GDB expands the "NS1::NS2::AliasTempl<int>" as
# "NS1::NS2::Templ2<int, int>".
foreach loc {
    "NS1::NS2::AliasTempl<int>::static_method<int>(NS1::NS2::object*)"
    "NS1::NS2::AliasTempl<int>::static_method<int>(NS1::NS2::object_p)"
} {
    if [test_compiler_info gcc*] {
	# While Clang emits "AliasTempl<int>" (etc.) typedefs, GCC
	# emits "AliasTempl" typedefs with no template parameter info.
	setup_xfail gcc/95437 *-*-*
    }
    check_bp $loc "NS1::NS2::Templ2<int, int>::static_method<int>(NS1::NS2::object*)"

    # Check that setting the breakpoint with GCC really failed,
    # instead of succeeding with e.g., "AliasTempl<int>" preserved in
    # the location text.  If that ever happens, we'll need to update
    # these tests.
    if [test_compiler_info gcc*] {
	check_setting_bp_fails "b $loc"
    }
}

# Check typedef substitution in a template in a qualified name in a
# function parameter list.  These used to crash GDB with recursion
# around "Templ1", because there's a "Templ1" typedef in the global
# namespace.
foreach loc {
    "NS1::NS2::int_Templ1_t_func(NS1::NS2::int_Templ1_t*)"
    "NS1::NS2::int_Templ1_t_func(NS1::NS2::Templ1<int>*)"
} {
    check_bp $loc "NS1::NS2::int_Templ1_t_func(NS1::NS2::Templ1<int>*)"
}