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# Copyright 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see .

# The program sigaltstack.c creates a backtrace containing nested

# signal handlers on an alternative stack.  This in turn leads to a

# non-contiguous (and possibly non-monotonic) backtrace - stack

# address jump at the normal-alt stack boundary.

# This test confirms that GDB can both backtrace through and finish

# such a stack.

if [target_info exists gdb,nosignals] {

    verbose "Skipping signals.exp because of nosignals."

    continue

}

if $tracelevel then {

    strace $tracelevel

}

set prms_id 0

set bug_id 0

set testfile sigaltstack

set srcfile ${testfile}.c

set binfile ${objdir}/${subdir}/${testfile}

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {

    untested "Couldn't compile ${srcfile}.c"

    return -1

}

# get things started

gdb_exit

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

# Pass all the alarms straight through (but verbosely)

gdb_test "handle SIGALRM print pass nostop"

gdb_test "handle SIGVTALRM print pass nostop"

gdb_test "handle SIGPROF print pass nostop"

# Advance to main

if { ![runto_main] } then {

    gdb_suppress_tests;

}

# Stop in handle, when at the inner most level

gdb_test "break catcher if level == INNER"

gdb_test "continue" ".* catcher .*" "continue to catch"

# step off the assignment

gdb_test "next"

# Full backtrace?

send_gdb "bt\n"

gdb_expect_list "backtrace" ".*$gdb_prompt $" {

    "\[\r\n\]+.0 \[^\r\n\]* catcher "

    "\[\r\n\]+.1  .signal handler called."

    "\[\r\n\]+.2 \[^\r\n\]* thrower .next_level=INNER"

    "\[\r\n\]+.3 \[^\r\n\]* catcher "

    "\[\r\n\]+.4  .signal handler called."

    "\[\r\n\]+.5 \[^\r\n\]* thrower .next_level=OUTER"

    "\[\r\n\]+.6 \[^\r\n\]* catcher "

    "\[\r\n\]+.7 \[^\r\n\]* main .*"

}

proc finish_test { pattern msg } {

    global gdb_prompt

    gdb_test_multiple "finish" $msg {

        -re "Cannot insert breakpoint 0.*${gdb_prompt} $" {

            # Some platforms use a special read-only page for signal

            # trampolines.  We can't set a breakpoint there, and we

            # don't gracefully fall back to single-stepping.

            setup_kfail "i?86-*-linux*" gdb/1736

            setup_kfail "*-*-openbsd*" gdb/1736

            fail "$msg (could not set breakpoint)"

        }

        -re "$pattern.*${gdb_prompt} $" {

            pass $msg

        }

    }

}

# Finish?

finish_test "signal handler called." "finish from catch LEAF"

finish_test "thrower .next_level=INNER, .*" "finish to throw INNER"

finish_test "catcher .*" "finish to catch INNER"

finish_test "signal handler called.*" "finish from catch INNER"

finish_test "thrower .next_level=OUTER, .*" "finish to OUTER"

finish_test "catcher .*" "finish to catch MAIN"

finish_test "main .*" "finish to MAIN"