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# Test `info auxv' and related functionality.

# Copyright
#       1992,1993,1994,1995,1996,1997,1998,1999,2000,2004,2007,2008,2009,2010
#       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 <http://www.gnu.org/licenses/>.

# This file is based on corefile.exp which was written by Fred
# Fish. (fnf@cygnus.com)

if { ! [istarget "*-*-linux*"] && ! [istarget "*-*-solaris*"] } {
    verbose "Skipping auxv.exp because of lack of support."
    return
}

if $tracelevel then {
        strace $tracelevel
}

set prms_id 0
set bug_id 0

set testfile "auxv"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
set corefile ${objdir}/${subdir}/${testfile}.corefile
set gcorefile ${objdir}/${subdir}/${testfile}.gcore

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
    untested "couldn't compile ${srcdir}/${subdir}/${srcfile}"
    return -1
}

# Use a fresh directory to confine the native core dumps.
# Make it the working directory for gdb and its child.
set coredir "${objdir}/${subdir}/coredir.[getpid]"
file mkdir $coredir
set core_works [expr [isnative] && ! [is_remote target]]

# Run GDB on the test program up to where it will dump core.

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
gdb_test "set print sevenbit-strings" "" \
        "set print sevenbit-strings; ${testfile}"
gdb_test "set width 0" "" \
        "set width 0; ${testfile}"

if {$core_works} {
    if {[gdb_test "cd $coredir" ".*Working directory .*" \
             "cd to temporary directory for core dumps"]} {
        set core_works 0
    }
}

if { ![runto_main] } then {
    gdb_suppress_tests;
}
set print_core_line [gdb_get_line_number "ABORT;"]
gdb_test "tbreak $print_core_line"
gdb_test continue ".*ABORT;.*"

proc fetch_auxv {test} {
    global gdb_prompt

    set auxv_lines {}
    set bad -1
    # Former trailing `\[\r\n\]+' may eat just \r leaving \n in the buffer
    # corrupting the next matches.
    if {[gdb_test_multiple "info auxv" $test {
        -re "info auxv\r\n" {
            exp_continue
        }
        -ex "The program has no auxiliary information now" {
            set bad 1
            exp_continue
        }
        -ex "Auxiliary vector is empty" {
            set bad 1
            exp_continue
        }
        -ex "No auxiliary vector found" {
            set bad 1
            exp_continue
        }
        -re "^\[0-9\]+\[ \t\]+(AT_\[^ \t\]+)\[^\r\n\]+\r\n" {
            lappend auxv_lines $expect_out(0,string)
            exp_continue
        }
        -re "^\[0-9\]+\[ \t\]+\\?\\?\\?\[^\r\n\]+\r\n" {
            warning "Unrecognized tag value: $expect_out(0,string)"
            set bad 1
            lappend auxv_lines $expect_out(0,string)
            exp_continue
        }
        -re "$gdb_prompt $" {
            incr bad
        }
        -re "^\[^\r\n\]+\r\n" {
            if {!$bad} {
                warning "Unrecognized output: $expect_out(0,string)"
                set bad 1
            }
            exp_continue
        }
    }] != 0} {
        return {}
    }

    if {$bad} {
        fail $test
        return {}
    }

    pass $test
    return $auxv_lines
}

set live_data [fetch_auxv "info auxv on live process"]

# Now try gcore.
set gcore_works 0
set escapedfilename [string_to_regexp $gcorefile]
gdb_test_multiple "gcore $gcorefile" "gcore" {
    -re "Saved corefile ${escapedfilename}\[\r\n\]+$gdb_prompt $" {
        pass "gcore"
        set gcore_works 1
    }
    -re "Can't create a corefile\[\r\n\]+$gdb_prompt $" {
        unsupported "gcore"
    }
    -re "Undefined command: .*\[\r\n\]+$gdb_prompt $" {
        unsupported "gcore"
    }
}

# Let the program continue and die.
gdb_test continue ".*Program received signal.*"
gdb_test continue ".*Program terminated with signal.*"

# Now collect the core dump it left.
set test "generate native core dump"
if {$core_works} {
    # Find the
    set names [glob -nocomplain -directory $coredir *core*]
    if {[llength $names] == 1} {
        set file [file join $coredir [lindex $names 0]]
        remote_exec build "mv $file $corefile"
        pass $test
    } else {
        set core_works 0
        warning "can't generate a core file - core tests suppressed - check ulimit -c"
        fail $test
    }
} else {
    unsupported $test
}
remote_exec build "rm -rf $coredir"

# Now we can examine the core files and check that their data matches what
# we saw in the process.  Note that the exact data can vary between runs,
# so it's important that the native core dump file and the gcore-created dump
# both be from the same run of the program as we examined live.

proc do_core_test {works corefile test1 test2} {
    if {! $works} {
        unsupported $test1
        unsupported $test2
    } else {
        gdb_test "core $corefile" "Core was generated by.*" \
            "load core file for $test1" \
            "A program is being debugged already.*" "y"
        set core_data [fetch_auxv $test1]
        global live_data
        if {$core_data == $live_data} {
            pass $test2
        } else {
            fail $test2
        }
    }
}

do_core_test $core_works $corefile \
    "info auxv on native core dump" "matching auxv data from live and core"

do_core_test $gcore_works $gcorefile \
    "info auxv on gcore-created dump" "matching auxv data from live and gcore"