1# Copyright 2004-2013 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 siginfo.exp because of nosignals."
28    continue
29}
30
31
32set testfile siginfo
33set srcfile ${testfile}.c
34set binfile ${objdir}/${subdir}/${testfile}
35if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
36    untested "Couldn't compile ${srcfile}.c"
37    return -1
38}
39
40# get things started
41gdb_exit
42gdb_start
43gdb_reinitialize_dir $srcdir/$subdir
44gdb_load ${binfile}
45
46gdb_test "display/i \$pc"
47
48# Advance to main
49if { ![runto_main] } then {
50    gdb_suppress_tests;
51}
52
53# Pass all the alarms straight through (but verbosely)
54# gdb_test "handle SIGALRM print pass nostop"
55# gdb_test "handle SIGVTALRM print pass nostop"
56# gdb_test "handle SIGPROF print pass nostop"
57
58# Run to the signal handler, validate the backtrace.
59gdb_test "break handler"
60gdb_test "continue" ".* handler .*" "continue to stepi handler"
61gdb_test_sequence "bt" "backtrace for nexti" {
62    "\[\r\n\]+.0 \[^\r\n\]* handler "
63    "\[\r\n\]+.1  .signal handler called."
64    "\[\r\n\]+.2 \[^\r\n\]* main "
65}
66
67# Check that GDB can step the inferior back to main
68set test "step out of handler"
69gdb_test_multiple "step" "${test}" {
70    -re "Could not insert single-step breakpoint.*$gdb_prompt $" {
71	setup_kfail gdb/1736 sparc*-*-openbsd*
72	fail "$test (could not insert single-step breakpoint)"
73    }
74    -re "done = 1;.*${gdb_prompt} $" {
75	send_gdb "$i\n"
76	exp_continue
77    }
78    -re "\} .. handler .*${gdb_prompt} $" {
79	send_gdb "step\n"
80	exp_continue
81    }
82    -re "$inferior_exited_re normally.*${gdb_prompt} $" {
83	kfail gdb/1613 "$test (program exited)"
84    }
85    -re "(while ..done|return 0).*${gdb_prompt} $" {
86	# After stepping out of a function /r signal-handler, GDB will
87	# advance the inferior until it is at the first instruction of
88	# a code-line.  While typically things return to the middle of
89	# the "while..." (and hence GDB advances the inferior to the
90	# "return..." line) it is also possible for the return to land
91	# on the first instruction of "while...".  Accept both cases.
92	pass "$test"
93    }
94}
95