gdb/testsuite/gdb.base/prelink.exp

# Copyright 2006-2020 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 { ![isnative] || [is_remote host] || [skip_shlib_tests]} {
    return
}

if [get_compiler_info] {
    return -1
}

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

load_lib prelink-support.exp

set testfile "prelink"

set libsrcfile ${testfile}-lib.c
set libfile [standard_output_file ${testfile}.so]

# Use -soname so that the new library gets copied by build_executable_own_libs.

if { [gdb_compile_shlib "${srcdir}/${subdir}/${libsrcfile}" "${libfile}" [list debug "ldflags=-Wl,-soname,[file tail ${libfile}]"]] != ""} {
    # If creating the shared library fails, maybe we don't have the right tools
    return -1
}

set srcfile ${testfile}.c
set executable ${testfile}t
set binfile [standard_output_file ${executable}]
set prelink_args [build_executable_own_libs ${testfile}.exp $executable $srcfile [list debug "ldflags=-Wl,${libfile},-rpath,[file dirname ${libfile}]"]]
if {$prelink_args == ""} {
    return -1
}

set test "split debug of executable"
if [gdb_gnu_strip_debug $binfile] {
    fail $test
} else {
    pass $test
}

if ![prelink_yes $prelink_args] {
    # Maybe we don't have prelink.
    return -1
}

set found 0
set coredir "[standard_output_file 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 [standard_output_file 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 [standard_output_file 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
}

# Relink $libfile to a different address.
if ![prelink_yes $prelink_args] {
    return -1
}

# Start with a fresh gdb

clean_restart $executable

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

gdb_test "core-file [standard_output_file prelink.core]" "Using PIC \\(Position Independent Code\\) prelink displacement 0x\[^0\]\[0-9a-f\]* for \[^\r\n\]*[file tail ${libfile}].*" "seen displacement message"

gdb_test "p &bssvar == bssvarp" " = 1" ".dynbss vs. .bss address shift"