1# Copyright 2004, 2007, 2008, 2009, 2010, 2011 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
16
17# The program siginfo.c creates a backtrace containing a signal
18# handler registered using sigaction's sa_sigaction / SA_SIGINFO.
19# Some OS's (e.g., GNU/Linux) use different signal trampolines for
20# sa_sigaction and sa_handler.
21
22# This test first confirms that GDB can backtrace through the
23# alternative sa_sigaction signal handler, and second that GDB can
24# nexti/stepi out of such a handler.
25
26if [target_info exists gdb,nosignals] {
27    verbose "Skipping signals.exp because of nosignals."
28    continue
29}
30
31if $tracelevel then {
32    strace $tracelevel
33}
34
35
36set testfile siginfo
37set srcfile ${testfile}.c
38set binfile ${objdir}/${subdir}/${testfile}
39if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
40    untested "Couldn't compile ${srcfile}.c"
41    return -1
42}
43
44# get things started
45gdb_exit
46gdb_start
47gdb_reinitialize_dir $srcdir/$subdir
48gdb_load ${binfile}
49
50gdb_test "display/i \$pc"
51
52# Advance to main
53if { ![runto_main] } then {
54    gdb_suppress_tests;
55}
56
57# Pass all the alarms straight through (but verbosely)
58# gdb_test "handle SIGALRM print pass nostop"
59# gdb_test "handle SIGVTALRM print pass nostop"
60# gdb_test "handle SIGPROF print pass nostop"
61
62# Run to the signal handler, validate the backtrace.
63gdb_test "break handler"
64gdb_test "continue" ".* handler .*" "continue to stepi handler"
65gdb_test_sequence "bt" "backtrace for nexti" {
66    "\[\r\n\]+.0 \[^\r\n\]* handler "
67    "\[\r\n\]+.1  .signal handler called."
68    "\[\r\n\]+.2 \[^\r\n\]* main "
69}
70
71# Check that GDB can step the inferior back to main
72set test "step out of handler"
73gdb_test_multiple "step" "${test}" {
74    -re "Could not insert single-step breakpoint.*$gdb_prompt $" {
75	setup_kfail gdb/1736 sparc*-*-openbsd*
76	fail "$test (could not insert single-step breakpoint)"
77    }
78    -re "done = 1;.*${gdb_prompt} $" {
79	send_gdb "$i\n"
80	exp_continue
81    }
82    -re "\} .. handler .*${gdb_prompt} $" {
83	send_gdb "step\n"
84	exp_continue
85    }
86    -re "$inferior_exited_re normally.*${gdb_prompt} $" {
87	kfail gdb/1613 "$test (program exited)"
88    }
89    -re "(while ..done|return 0).*${gdb_prompt} $" {
90	# After stepping out of a function /r signal-handler, GDB will
91	# advance the inferior until it is at the first instruction of
92	# a code-line.  While typically things return to the middle of
93	# the "while..." (and hence GDB advances the inferior to the
94	# "return..." line) it is also possible for the return to land
95	# on the first instruction of "while...".  Accept both cases.
96	pass "$test"
97    }
98}
99