1# Copyright 2004, 2007 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
35set prms_id 0
36set bug_id 0
37
38set testfile siginfo
39set srcfile ${testfile}.c
40set binfile ${objdir}/${subdir}/${testfile}
41if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
42    untested "Couldn't compile ${srcfile}.c"
43    return -1
44}
45
46# get things started
47gdb_exit
48gdb_start
49gdb_reinitialize_dir $srcdir/$subdir
50gdb_load ${binfile}
51
52gdb_test "display/i \$pc"
53
54# Advance to main
55if { ![runto_main] } then {
56    gdb_suppress_tests;
57}
58
59# Pass all the alarms straight through (but verbosely)
60# gdb_test "handle SIGALRM print pass nostop"
61# gdb_test "handle SIGVTALRM print pass nostop"
62# gdb_test "handle SIGPROF print pass nostop"
63
64# Run to the signal handler, validate the backtrace.
65gdb_test "break handler"
66gdb_test "continue" ".* handler .*" "continue to stepi handler"
67send_gdb "bt\n"
68gdb_expect_list "backtrace for nexti" ".*$gdb_prompt $" {
69    "\[\r\n\]+.0 \[^\r\n\]* handler "
70    "\[\r\n\]+.1  .signal handler called."
71    "\[\r\n\]+.2 \[^\r\n\]* main .*"
72}
73
74# Check that GDB can step the inferior back to main
75set test "step out of handler"
76gdb_test_multiple "step" "${test}" {
77    -re "Could not insert single-step breakpoint.*$gdb_prompt $" {
78	setup_kfail sparc*-*-openbsd* gdb/1736
79	fail "$test (could not insert single-step breakpoint)"
80    }
81    -re "done = 1;.*${gdb_prompt} $" {
82	send_gdb "$i\n"
83	exp_continue
84    }
85    -re "\} .. handler .*${gdb_prompt} $" {
86	send_gdb "step\n"
87	exp_continue
88    }
89    -re "Program exited normally.*${gdb_prompt} $" {
90	kfail gdb/1613 "$test (program exited)"
91    }
92    -re "(while ..done|return 0).*${gdb_prompt} $" {
93	# After stepping out of a function /r signal-handler, GDB will
94	# advance the inferior until it is at the first instruction of
95	# a code-line.  While typically things return to the middle of
96	# the "while..." (and hence GDB advances the inferior to the
97	# "return..." line) it is also possible for the return to land
98	# on the first instruction of "while...".  Accept both cases.
99	pass "$test"
100    }
101}
102