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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 siginfo.c creates a backtrace containing a signal

# handler registered using sigaction's sa_sigaction / SA_SIGINFO.

# Some OS's (e.g., GNU/Linux) use different signal trampolines for

# sa_sigaction and sa_handler.

# This test first confirms that GDB can backtrace through the

# alternative sa_sigaction signal handler, and second that GDB can

# nexti/stepi out of such a handler.

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 siginfo

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}

gdb_test "display/i \$pc"

# Advance to main

if { ![runto_main] } then {

    gdb_suppress_tests;

}

# 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"

# Run to the signal handler, validate the backtrace.

gdb_test "break handler"

gdb_test "continue" ".* handler .*" "continue to stepi handler"

send_gdb "bt\n"

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

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

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

    "\[\r\n\]+.2 \[^\r\n\]* main .*"

}

# Check that GDB can step the inferior back to main

set test "step out of handler"

gdb_test_multiple "step" "${test}" {

    -re "Could not insert single-step breakpoint.*$gdb_prompt $" {

        setup_kfail sparc*-*-openbsd* gdb/1736

        fail "$test (could not insert single-step breakpoint)"

    }

    -re "done = 1;.*${gdb_prompt} $" {

        send_gdb "$i\n"

        exp_continue

    }

    -re "\} .. handler .*${gdb_prompt} $" {

        send_gdb "step\n"

        exp_continue

    }

    -re "Program exited normally.*${gdb_prompt} $" {

        kfail gdb/1613 "$test (program exited)"

    }

    -re "(while ..done|return 0).*${gdb_prompt} $" {

        # After stepping out of a function /r signal-handler, GDB will

        # advance the inferior until it is at the first instruction of

        # a code-line.  While typically things return to the middle of

        # the "while..." (and hence GDB advances the inferior to the

        # "return..." line) it is also possible for the return to land

        # on the first instruction of "while...".  Accept both cases.

        pass "$test"

    }

}