gdb/testsuite/gdb.cp/call-method-register.exp

# Copyright 1992-2021 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/>.

# Test callling a method on a variable that has been put in a
# register.

if { [skip_cplus_tests] } { continue }

load_lib "cp-support.exp"

standard_testfile .cc

if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}]} {
    return -1
}

proc test_call_register_class {} {
    global gdb_prompt

    if ![runto_main] {
	return
    }

    set bp_location [gdb_get_line_number "set breakpoint here"]
    gdb_breakpoint $bp_location
    gdb_continue_to_breakpoint "break here"

    # This class is so small that an instance of it can fit in a register.
    # When gdb tries to call a method, it gets embarrassed about taking
    # the address of a register.
    #
    # That message is a PASS, not an XFAIL, because gdb prints an
    # informative message and declines to do something impossible.
    #
    # The method call actually succeeds if the compiler allocates very
    # small classes in memory instead of registers.  If that happens,
    # it's a FAIL, because the testcase is written in a form such that
    # it should not happen.
    gdb_test "print v.method ()" \
	"Address requested for identifier \"v\" which is in register .*" \
	"call method on register local"
}

test_call_register_class