1# step.exp -- Expect script to test gdb with step.c
2# Copyright (C) 1992, 1997, 2007 Free Software Foundation, Inc.
3
4# This program is free software; you can redistribute it and/or modify
5# it under the terms of the GNU General Public License as published by
6# the Free Software Foundation; either version 3 of the License, or
7# (at your option) any later version.
8#
9# This program is distributed in the hope that it will be useful,
10# but WITHOUT ANY WARRANTY; without even the implied warranty of
11# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12# GNU General Public License for more details.
13#
14# You should have received a copy of the GNU General Public License
15# along with this program.  If not, see <http://www.gnu.org/licenses/>.
16
17# Please email any bugs, comments, and/or additions to this file to:
18# bug-gdb@prep.ai.mit.edu
19
20# This file was written by Hiro Sugawara. (hiro@lynx.com)
21#
22# This test really needs some major surgery to be acceptable, but
23# I'm just about burnt out on lynx work, so I'm not doing it now.
24#
25#	* The test has an indeterminate number of pass/fails
26#	for each run (it runs a small group of tests until
27#	it's timer kicks off).  This is very bad for nightly
28#	automated regression testing.
29#
30#	* It tries to "step" from withint he prologue of a
31# 	function.  This isn't support in gdb (it's going
32#	to act like a continue).
33#
34#	* This test rarely check that it stopped in sensible
35#	places.  (see previous bullet -- this test doesn't
36#	catch the fact it continued rather than stepped)
37
38
39if $tracelevel then {
40	strace $tracelevel
41}
42
43set program_exited 0
44
45proc set_bp { where } {
46    global gdb_prompt
47
48    send_gdb "break $where\n"
49    # The first regexp is what we get with -g, the second without -g.
50    gdb_expect {
51	-re "Break.* at .*: file .*, line \[0-9\]*.*$gdb_prompt $" {}
52	-re "Breakpoint \[0-9\]* at 0x\[0-9a-f\]*.*$gdb_prompt $" {}
53	-re "$gdb_prompt $" { fail "setting breakpoint at $where" ; return 0 }
54	timeout { fail "setting breakpoint at $where (timeout)" ; return 0 }
55    }
56    pass "set_bp"
57}
58
59proc step_it { cmd } {
60    global gdb_prompt
61    global program_exited
62
63    send_gdb "$cmd\n"
64    gdb_expect {
65	-re "0x\[0-9A-Fa-f\]* *in.*\r\n$gdb_prompt $" { pass "step_it"; return 0 }
66	-re "0x\[0-9A-Fa-f\]* *\[0-9\]*.*\r\n$gdb_prompt $" { pass "step_it"; return 1 }
67	-re "Program exited .*\n$gdb_prompt $" {
68		set program_exited 1
69		return -1
70	    }
71	-re "$gdb_prompt $"	{ fail "single-stepping ($cmd).\n" ; return -1 }
72	timeout	{ fail "single-stepping ($cmd) timout.\n" ; return -1 }
73    }
74}
75
76proc step_inst {} {
77    step_it "stepi"
78}
79
80proc step_source {} {
81    step_it "step"
82}
83
84proc continue_all {} {
85    global gdb_prompt
86
87    send_gdb "continue\n"
88    gdb_expect {
89	-re "Breakpoint \[0-9\]*, thread\[0-9\]* .*$gdb_prompt $" {
90	    pass "continue_all"
91	    return 0
92	}
93	-re "Program exited .*\n$gdb_prompt $" {
94	    set program_exited 1
95	    return 1;
96	}
97	-re "$gdb_prompt $" { fail "continue" ; return -1 }
98	timeout { fail "continue (timeout)" ; return -1 }
99    }
100}
101
102proc check_threads { num_threads } {
103    global gdb_prompt
104
105    set curr_thread 0
106    send_gdb "info threads\n"
107    while { $num_threads > 0 } {
108	gdb_expect {
109	    -re "\\* *\[0-9\]* process \[0-9\]* thread \[0-9\]* .*\n" {
110		incr curr_thread
111		set num_threads [expr $num_threads - 1]
112	    }
113	    -re " *\[0-9\]* process \[0-9\]* thread \[0-9\]* .*\n" {
114		set num_threads [expr $num_threads - 1]
115	    }
116	    -re "$gdb_prompt $" {
117		if { $num_threads < 0 } {
118		    fail "check_threads (too many)" ; return -1
119		}
120		break
121	    }
122	    timeout { fail "check_threads (timeout)" ; return -1 }
123	}
124    }
125
126    if { $curr_thread == 0 } {
127	fail "check_threads (no current thread)\n"
128	return -1
129    }
130    if { $curr_thread > 1 } {
131	fail "check_threads (more than one current thread)\n"
132	return -1
133    }
134    return 0
135}
136
137proc test_cond_wait {} {
138    global program_exited
139
140    set_bp	135
141    runto	179
142    while { 1 } {
143	set stepi_counter 0
144	while { [step_inst] } {
145		if { $program_exited } { break }
146		incr stepi_counter
147		if { $stepi_counter > 30 } {
148			fail "too many stepi's per line\n"
149			return -1
150		}
151	}
152	if { $program_exited } { break }
153	step_source
154	if { $program_exited } { break }
155	continue_all
156	if { $program_exited } { break }
157	check_threads 3
158    }
159}
160
161proc do_tests {} {
162    global prms_id
163    global bug_id
164    global subdir
165    global objdir
166    global srcdir
167    global binfile
168    global gdb_prompt
169
170    set prms_id 0
171    set bug_id 0
172
173    # Start with a fresh gdb.
174
175    gdb_exit
176    gdb_start
177    gdb_reinitialize_dir $srcdir/$subdir
178    gdb_load $objdir/$subdir/$binfile
179
180    send_gdb "set width 0\n"
181    gdb_expect -re "$gdb_prompt $"
182
183    test_cond_wait
184}
185
186# Check to see if we have an executable to test.  If not, then either we
187# haven't tried to compile one, or the compilation failed for some reason.
188# In either case, just notify the user and skip the tests in this file.
189
190set binfile "step"
191set srcfile "step.c"
192
193if ![file exists $objdir/$subdir/$binfile] then {
194    if $all_flag then {
195	warning "$binfile does not exist; tests suppressed."
196    }
197} else {
198    do_tests
199}
200