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# Copyright 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 .

#

# Contributed by Jan Kratochvil .

# Test GDB can cope with two libraries loaded with overlapping VMA ranges.

# Prelink libraries first so they can be loaded and their native address.

# In such case `struct linkmap'.l_addr will be zero.  Provide different

# unprelinked library files on the disk which have zero-based VMAs.  These

# different files should have their .dynamic section at a different offset in

# page size so that we get for

#   warning: .dynamic section for "..." is not at the expected address

# the reason

#   (wrong library or version mismatch?)

# and not:

#   difference appears to be caused by prelink, adjusting expectations

# In such case both disk libraries will be loaded at VMAs starting at zero.

if [skip_shlib_tests] {

    return 0

}

# Are we on a target board?  It is required for attaching to a process.

if [is_remote target] {

    return 0

}

if [get_compiler_info binfile-unused] {

    return -1;

}

# Library file.

set libname "solib-overlap-lib"

set srcfile_lib ${srcdir}/${subdir}/${libname}.c

# Binary file.

set testfile "solib-overlap-main"

set srcfile ${srcdir}/${subdir}/${testfile}.c

# Base addresses for `prelink -r' which should be compatible with both -m32 and

# -m64 targets.  If it clashes with system prelinked libraries it would give

# false PASS.

# Prelink first lib1 at 0x40000000 and lib2 at 0x41000000.

# During second pass try lib1 at 0x50000000 and lib2 at 0x51000000.

foreach prelink_lib1 {0x40000000 0x50000000} {

    set prelink_lib2 [format "0x%x" [expr $prelink_lib1 + 0x01000000]]

    set old_prefix $pf_prefix

    lappend pf_prefix "$prelink_lib1:"

    # Library file.

    set binfile_lib1 ${objdir}/${subdir}/${libname}1-${prelink_lib1}.so

    set binfile_lib2 ${objdir}/${subdir}/${libname}2-${prelink_lib1}.so

    set lib_flags {debug}

    # Binary file.

    set binfile_base ${testfile}-${prelink_lib1}

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

    set bin_flags [list debug shlib=${binfile_lib1} shlib=${binfile_lib2}]

    set escapedbinfile  [string_to_regexp ${binfile}]

    if { [gdb_compile_shlib ${srcfile_lib} ${binfile_lib1} $lib_flags] != ""

         || [gdb_compile_shlib ${srcfile_lib} ${binfile_lib2} $lib_flags] != ""

         || [gdb_compile ${srcfile} ${binfile} executable $bin_flags] != "" } {

        untested "Could not compile ${binfile_lib1}, ${binfile_lib2} or ${binfile}."

        return -1

    }

    if {[catch "system \"prelink -N -r ${prelink_lib1} ${binfile_lib1}\""] != 0

        || [catch "system \"prelink -N -r ${prelink_lib2} ${binfile_lib2}\""] != 0} {

        # Maybe we don't have prelink.

        untested "Could not prelink ${binfile_lib1} or ${binfile_lib2}."

        return -1

    }

    # Start the program running and then wait for a bit, to be sure

    # that it can be attached to.

    set testpid [eval exec $binfile &]

    sleep 2

    if { [istarget "*-*-cygwin*"] } {

        # testpid is the Cygwin PID, GDB uses the Windows PID, which might be

        # different due to the way fork/exec works.

        set testpid [ exec ps -e | gawk "{ if (\$1 == $testpid) print \$4; }" ]

    }

    remote_exec build "mv -f ${binfile_lib1} ${binfile_lib1}-running"

    remote_exec build "mv -f ${binfile_lib2} ${binfile_lib2}-running"

    # Provide another exported function name to cause different sizes of sections.

    lappend lib_flags additional_flags=-DSYMB

    if { [gdb_compile_shlib ${srcfile_lib} ${binfile_lib1} $lib_flags] != ""

         || [gdb_compile_shlib ${srcfile_lib} ${binfile_lib2} $lib_flags] != ""} {

        untested "Could not recompile ${binfile_lib1} or ${binfile_lib2}."

        remote_exec build "kill -9 ${testpid}"

        return -1

    }

    clean_restart ${binfile_base}

    # This testcase currently does not support remote targets.

    # gdb_load_shlibs ${binfile_lib1} ${binfile_lib2}

    # Here we should get:

    # warning: .dynamic section for ".../solib-overlap-lib1.so" is not at the expected address (wrong library or version mismatch?)

    # warning: .dynamic section for ".../solib-overlap-lib2.so" is not at the expected address (wrong library or version mismatch?)

    set test attach

    gdb_test_multiple "attach $testpid" $test {

        -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*$gdb_prompt $" {

            pass $test

        }

        -re "Attaching to program.*`?$escapedbinfile\.exe'?, process $testpid.*\[Switching to thread $testpid\..*\].*$gdb_prompt $" {

            # Response expected on Cygwin

            pass $test

        }

    }

    # Detach the process.

    gdb_test "detach" "Detaching from program: .*$escapedbinfile, process $testpid"

    # Wait a bit for gdb to finish detaching

    sleep 5

    remote_exec build "kill -9 ${testpid}"

    set pf_prefix $old_prefix

}