gdb/testsuite/gdb.base/sigstep.exp

# Copyright 2004 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  


# The program sigstep.c creates a very simple backtrace containing one
# signal handler and signal trampoline.

# This test runs the program up to the signal handler, and then
# attempts to step/next the inferior back to main.

if [target_info exists gdb,nosignals] {
    verbose "Skipping sigstep.exp because of nosignals."
    continue
}

if $tracelevel then {
    strace $tracelevel
}

set prms_id 0
set bug_id 0

set testfile sigstep
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
    untested "Couldn't compile ${module}.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 .*"
}

proc advance { i } {
    global gdb_prompt

    # Get us back into the handler
    rerun_to_main
    gdb_test "continue" ".* handler .*" "continue to handler for $i"

    set test "$i out of handler"
    gdb_test_multiple "$i" "${test}" {
	-re "done = 1;.*${gdb_prompt} $" {
	    send_gdb "$i\n"
	    exp_continue
	}
	-re "\} .. handler .*${gdb_prompt} $" {
	    send_gdb "$i\n"
	    exp_continue
	}
	-re "Program exited normally.*${gdb_prompt} $" {
	    setup_kfail powerpc-*-*bsd* gdb/1639
	    fail "$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"
	}
    }
}

proc advancei { i } {
    global gdb_prompt
    set program_exited 0

    # Get us back into the handler
    rerun_to_main
    gdb_test "continue" ".* handler .*" "continue to handler for $i"

    set test "$i into signal trampoline"
    gdb_test_multiple "$i" "${test}" {
	-re "done = 1;.*${gdb_prompt} $" {
	    send_gdb "$i\n"
	    exp_continue
	}
	-re "\} .. handler .*${gdb_prompt} $" {
	    send_gdb "$i\n"
	    exp_continue
	}
	-re "signal handler called.*${gdb_prompt} $" {
	    pass "$test"
	}
	-re "main .*${gdb_prompt} $" {
	    fail "$test (in main)"
	}
	-re "Program exited normally.*${gdb_prompt} $" {
	    fail "$test (program exited)"
	    set program_exited 1
	}
	-re "Make handler return now.*y or n. $" {
	    send_gdb "y\n"
	    exp_continue
	}
    }

    set test "$i out of signal trampoline"
    gdb_test_multiple "$i" "${test}" {
	-re "while .*${gdb_prompt} $" {
	    pass "$test (in main)"
	}
	-re "signal handler called.*${gdb_prompt} $" {
	    send_gdb "$i\n"
	    exp_continue
	}
	-re "return .*${gdb_prompt} $" {
	    fail "$test (stepped)"
	}
	-re "Make .*frame return now.*y or n. $" {
	    send_gdb "y\n"
	    exp_continue
	}
	-re "Program exited normally.*${gdb_prompt} $" {
	    kfail gdb/1639 "$test (program exited)"
	    set program_exited 1
	}
	-re "The program is not being run.*${gdb_prompt} $" {
	    if { $program_exited } {
		# Previously kfailed with an exit
		pass "$test (the program is not being run)"
	    } else {
		fail "$test (the program is not being run)"
	    }
	}
    }
}

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