# Copyright 2006, 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/>.

# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@gnu.org

# This file was written by Alexandre Oliva <aoliva@redhat.com>

if $tracelevel then {
	strace $tracelevel
	}

set prms_id 0
set bug_id 0

# are we on a target board
if ![isnative] then {
    return
}

if [get_compiler_info "ignored"] {
    return -1
}

if {$gcc_compiled == 0} {
    return -1
}

set testfile "prelink"

set libsrcfile ${testfile}-lib.c
set libfile ${objdir}/${subdir}/${testfile}.so
if { [gdb_compile "${srcdir}/${subdir}/${libsrcfile}" "${libfile}" executable [list debug "additional_flags=-fpic -shared -nodefaultlibs"]] != ""} {
    # If creating the shared library fails, maybe we don't have the right tools
    return -1
}

# `--no-exec-shield' is for i386 where prelink in the exec-shield mode is
# forced to push all the libraries tight together to fit into the first two
# memory areas (either the ASCII Shield area or at least below the executable).
# In this case its -R option cannot be applied and we falsely FAIL here as if
# the system is already prelinked prelink has no choice how to randomize the
# single new unprelinked library address without wasting the first one/two
# memory areas.  We do not care of the efficiency of loading such resulting
# exec-shield unfriendly prelinked library.
if {[catch "system \"prelink -qNR --no-exec-shield ${libfile}\""] != 0} {
    # Maybe we don't have prelink.
    return -1
}

set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}t
if { [gdb_compile "${srcdir}/${subdir}/${srcfile} ${libfile}" "${binfile}" executable [list debug "additional_flags=-Wl,-rpath,${objdir}/${subdir}"]] != ""} {
    return -1;
}

set found 0
set coredir "${objdir}/${subdir}/coredir.[getpid]"
file mkdir $coredir
catch "system \"(cd ${coredir}; ulimit -c unlimited; ${binfile}; true) >/dev/null 2>&1\""

foreach i "${coredir}/core ${coredir}/core.coremaker.c ${binfile}.core" {
    if [remote_file build exists $i] {
	remote_exec build "mv $i ${objdir}/${subdir}/prelink.core"
	set found 1
    }
}
# Check for "core.PID".
if { $found == 0 } {
    set names [glob -nocomplain -directory $coredir core.*]
    if {[llength $names] == 1} {
        set corefile [file join $coredir [lindex $names 0]]
        remote_exec build "mv $corefile ${objdir}/${subdir}/prelink.core"
        set found 1
    }
}

# Try to clean up after ourselves.
remote_file build delete [file join $coredir coremmap.data]
remote_exec build "rmdir $coredir"

if { $found == 0  } {
    warning "can't generate a core file - prelink tests suppressed - check ulimit -c"
    return 0
}

if {[catch "system \"prelink -uN ${libfile}\""] != 0} {
    untested "${testfile}.so was not prelinked, maybe system libraries are not prelinked?"
    return 0
}
catch "system \"prelink -qNR --no-exec-shield ${libfile}\""

# Start with a fresh gdb

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

# Print the "adjusting expectations" message.
gdb_test "set verbose on"

set test "prelink"
global gdb_prompt
gdb_test_multiple "core-file $objdir/$subdir/prelink.core" "$test" {
    -re "warning: \.dynamic section.*not at the expected address.*warning: difference.*caused by prelink, adjusting expectations.*$gdb_prompt $" {
	pass "$test"
    }
}

gdb_exit

return 0