gdb/testsuite/gdb.cp/var-tag.exp

# Copyright 2014-2021 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 is part of the gdb testsuite

# Test expressions in which variable names shadow tag names.

if {[skip_cplus_tests]} { continue }

standard_testfile var-tag.cc var-tag-2.cc var-tag-3.cc var-tag-4.cc

if {[prepare_for_testing "failed to prepare" $testfile \
    [list $srcfile $srcfile2 $srcfile3 $srcfile4] {debug c++}]} {
    return -1
}

proc do_global_tests {lang} {
    set invalid_print "Attempt to use a type name as an expression"

    if {$lang == "c++"} {
	set opt_underlying "(: unsigned (int|short|char) )?"
    } else {
	set opt_underlying ""
    }
    set ptypefmt "type = (class|enum|union|struct) %s $opt_underlying{.*}"

    with_test_prefix $lang {
    gdb_test_no_output "set language $lang"
    gdb_test "ptype C" "type = class C {.*}"
    gdb_test "print E" "= a"
    gdb_test "ptype E" "type = enum E $opt_underlying{.*}"
    gdb_test "print S" "= {<No data fields>}"
    gdb_test "ptype S" "type = struct S {.*}"
    gdb_test "print U" "= {.*}"
    gdb_test "ptype U" "type = union U {.*}"
    gdb_test "print cc" "= {.*}"
    gdb_test "ptype cc" "type = class CC {.*}"
    gdb_test "print CC" [format $invalid_print "CC"]
    gdb_test "ptype CC" [format $ptypefmt "CC"]
    gdb_test "print ss" "= {<No data fields>}"
    gdb_test "ptype ss" "type = struct SS {.*}"
    gdb_test "print SS" [format $invalid_print "SS"]
    gdb_test "ptype SS" [format $ptypefmt "SS"]
    gdb_test "print ee" "= .*"
    gdb_test "ptype ee" "type = enum EE $opt_underlying{.*}"
    gdb_test "print EE" [format $invalid_print "EE"]
    gdb_test "ptype EE" [format $ptypefmt "EE"]
    gdb_test "print uu" "= {.*}"
    gdb_test "ptype uu" "type = union UU {.*}"
    gdb_test "print UU" [format $invalid_print  "UU"]
    gdb_test "ptype UU" [format $ptypefmt "UU"]

    # These tests exercise lookup of symbols using the "quick fns" API.
    # Each of them is in a separate CU as once its CU is expanded,
    # we're no longer using the quick fns API.
    gdb_test "print E2" "= a2"
    gdb_test "ptype E2" "type = enum E2 $opt_underlying{.*}"
    gdb_test "print S2" "= {<No data fields>}"
    gdb_test "ptype S2" "type = struct S2 {.*}"
    gdb_test "print U2" "= {.*}"
    gdb_test "ptype U2" "type = union U2 {.*}"
    }
}

# First test expressions when there is no context.
with_test_prefix "before start" {
    do_global_tests c++
    do_global_tests c
}

# Run to main and test again.
if {![runto_main]} {
    perror "couldn't run to main"
    continue
}

with_test_prefix "in main" {
    do_global_tests c++
    do_global_tests c
}

# Run to C::f and test again.
gdb_breakpoint "C::f"
gdb_continue_to_breakpoint "continue to C::f"
with_test_prefix "in C::f" {
    do_global_tests c++
    do_global_tests c
}

# Another hard-to-guess-the-users-intent bug...
# It would be really nice if we could query the user!
with_test_prefix "global collision" {
    gdb_test_no_output "set language c++"
    setup_kfail "c++/16463" "*-*-*"
    gdb_test "print global" "= 3"

    # ... with a simple workaround:
    gdb_test "print ::global" "= 3"
}