1# Copyright 2004 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 2 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, write to the Free Software
15# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
16
17
18# The program sigaltstack.c creates a backtrace containing nested
19# signal handlers on an alternative stack.  This in turn leads to a
20# non-contiguous (and possibly non-monotonic) backtrace - stack
21# address jump at the normal-alt stack boundary.
22
23# This test confirms that GDB can both backtrace through and finish
24# such a stack.
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 sigaltstack
39set srcfile ${testfile}.c
40set binfile ${objdir}/${subdir}/${testfile}
41if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
42    untested "Couldn't compile ${module}.c"
43    return -1
44}
45
46# get things started
47gdb_exit
48gdb_start
49gdb_reinitialize_dir $srcdir/$subdir
50gdb_load ${binfile}
51
52# Pass all the alarms straight through (but verbosely)
53gdb_test "handle SIGALRM print pass nostop"
54gdb_test "handle SIGVTALRM print pass nostop"
55gdb_test "handle SIGPROF print pass nostop"
56
57# Advance to main
58if { ![runto_main] } then {
59    gdb_suppress_tests;
60}
61
62# Stop in handle, when at the inner most level
63gdb_test "break catcher if level == INNER"
64gdb_test "continue" ".* catcher .*" "continue to catch"
65# step off the assignment
66gdb_test "next"
67
68# Full backtrace?
69send_gdb "bt\n"
70gdb_expect_list "backtrace" ".*$gdb_prompt $" {
71    "\[\r\n\]+.0 \[^\r\n\]* catcher "
72    "\[\r\n\]+.1  .signal handler called."
73    "\[\r\n\]+.2 \[^\r\n\]* thrower .next_level=INNER"
74    "\[\r\n\]+.3 \[^\r\n\]* catcher "
75    "\[\r\n\]+.4  .signal handler called."
76    "\[\r\n\]+.5 \[^\r\n\]* thrower .next_level=OUTER"
77    "\[\r\n\]+.6 \[^\r\n\]* catcher "
78    "\[\r\n\]+.7 \[^\r\n\]* main .*"
79}
80
81proc finish_test { pattern msg } {
82    global gdb_prompt
83
84    gdb_test_multiple "finish" $msg {
85	-re "Cannot insert breakpoint 0.*${gdb_prompt} $" {
86	    # Some platforms use a special read-only page for signal
87	    # trampolines.  We can't set a breakpoint there, and we
88	    # don't gracefully fall back to single-stepping.
89	    setup_kfail "i?86-*-linux*" gdb/1736
90	    fail "$msg (could not set breakpoint)"
91	}
92	-re "$pattern.*${gdb_prompt} $" {
93	    pass $msg
94	}
95    }
96}
97
98# Finish?
99finish_test "signal handler called." "finish from catch LEAF"
100finish_test "thrower .next_level=INNER, .*" "finish to throw INNER"
101finish_test "catcher .*" "finish to catch INNER"
102finish_test "signal handler called.*" "finish from catch INNER"
103finish_test "thrower .next_level=OUTER, .*" "finish to OUTER"
104finish_test "catcher .*" "finish to catch MAIN"
105finish_test "main .*" "finish to MAIN"
106