xref: /netbsd-src/external/gpl3/gdb.old/dist/gdb/testsuite/gdb.base/step-indirect-call-thunk.exp (revision 867d70fc718005c0918b8b8b2f9d7f2d52d0a0db) 
1# Copyright 2018-2019 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
16standard_testfile
17
18set cflags "-mindirect-branch=thunk -mfunction-return=thunk"
19if { [prepare_for_testing "failed to prepare" $testfile $srcfile \
20        [list debug "additional_flags=$cflags"]] } {
21    return -1
22}
23
24if { ![runto_main] } {
25    untested "failed to run to main"
26    return -1
27}
28
29# Do repeated instruction steps in order to reach TARGET from CURRENT
30#
31#  CURRENT is a string matching the current location
32#  TARGET  is a string matching the target location
33#  TEST    is the test name
34#
35# The function issues repeated "stepi" commands as long as the location
36# matches CURRENT up to a maximum of 100 steps.
37#
38# TEST passes if the resulting location matches TARGET and fails
39# otherwise.
40#
41proc stepi_until { current target test } {
42    global gdb_prompt
43
44    set count 0
45    gdb_test_multiple "stepi" "$test" {
46        -re "$current.*$gdb_prompt $" {
47            incr count
48            if { $count < 100 } {
49                send_gdb "stepi\n"
50                exp_continue
51            } else {
52                fail "$test"
53            }
54        }
55        -re "$target.*$gdb_prompt $" {
56            pass "$test"
57        }
58    }
59}
60
61# Normal stepping steps through all thunks.
62gdb_test "step" "thrice\.2.*" "step into thrice"
63gdb_test "next" "thrice\.3.*" "step through thunks and over inc"
64gdb_test "step" "inc\.2.*" "step through call thunk into inc"
65gdb_test "step" "inc\.3.*" "step inside inc"
66gdb_test "step" "thrice\.4.*" "step through return thunk back into thrice"
67
68# We can use instruction stepping to step into thunks.
69stepi_until "thrice" "indirect_thunk" "stepi into call thunk"
70stepi_until "indirect_thunk" "inc." "stepi out of call thunk into inc"
71stepi_until "inc" "return_thunk" "stepi into return thunk"
72stepi_until "return_thunk" "thrice" \
73    "stepi out of return thunk back into thrice"
74