693 lines
21 KiB
Plaintext
693 lines
21 KiB
Plaintext
# Copyright 2010-2016 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This test only works on GNU/Linux.
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if { ![isnative] || [is_remote host] || [target_info exists use_gdb_stub]
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|| ![istarget *-linux*] || [skip_shlib_tests]} {
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continue
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}
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load_lib prelink-support.exp
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set test "break-interp"
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set binprefix [standard_output_file ${test}]
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# Only to get the $interp_system name.
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set srcfile_test "start.c"
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set binfile_test ${test}-test
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set binfile_lib ${binprefix}.so
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set srcfile "${test}-main.c"
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set srcfile_lib "${test}-lib.c"
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if [get_compiler_info] {
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return -1
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}
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# Use -soname so that the new library gets copied by build_executable_own_libs.
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if {[gdb_compile_shlib ${srcdir}/${subdir}/${srcfile_lib} ${binfile_lib} [list debug ldflags=-Wl,-soname,${test}.so]] != ""} {
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return -1
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}
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if {[build_executable ${test}.exp $binfile_test ${srcfile_test} {}] == -1} {
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return -1
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}
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# Note: The separate debug info file content build-id/crc32 are not verified
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# contrary to the GDB search algorithm skipping non-matching ones.
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proc system_debug_get {exec} {
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global debug_root
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set exec_build_id_debug [build_id_debug_filename_get $exec]
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set debug_base "[file tail $exec].debug"
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set exec_dir [file dirname $exec]
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# isfile returns 1 even for symlinks to files.
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set retval $debug_root/$exec_build_id_debug
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if [file isfile $retval] {
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return $retval
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}
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set retval $exec_dir/$debug_base
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if [file isfile $retval] {
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return $retval
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}
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set retval $exec_dir/.debug/$debug_base
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if [file isfile $retval] {
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return $retval
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}
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set retval $debug_root/$exec_dir/$debug_base
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if [file isfile $retval] {
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return $retval
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}
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return ""
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}
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gdb_exit
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gdb_start
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set debug_root ""
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set test "show debug-file-directory"
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gdb_test_multiple $test $test {
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-re "The directory where separate debug symbols are searched for is \"(.*)\".\r\n$gdb_prompt $" {
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set debug_root $expect_out(1,string)
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}
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}
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set interp_system [section_get [standard_output_file $binfile_test] .interp]
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set interp_system_debug [system_debug_get $interp_system]
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verbose -log "$interp_system has debug $interp_system_debug"
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proc prelinkNO {arg {name ""}} {
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return [prelink_no $arg $name]
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}
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proc prelinkYES {arg {name ""}} {
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return [prelink_yes $arg $name]
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}
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proc strip_debug {dest} {
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set test "strip [file tail $dest]"
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set strip_program [transform strip]
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set command "exec $strip_program --strip-debug $dest"
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verbose -log "command is $command"
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if [catch $command] {
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fail $test
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return 0
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} else {
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pass $test
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return 1
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}
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}
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# The marker function for the standard runtime linker interface is
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# _dl_debug_state. The probes-based interface has no specific marker
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# function; the probe we will stop on (init_start) is in dl_main so we
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# check for that.
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set solib_bp {(_dl_debug_state|dl_main)}
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# Implementation of reach.
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proc reach_1 {func command displacement} {
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global gdb_prompt expect_out solib_bp
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if {$func == $solib_bp} {
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# Breakpoint on _dl_debug_state can have problems due to its overlap
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# with the existing internal breakpoint from GDB.
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gdb_test_no_output "set stop-on-solib-events 1"
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} elseif {! [gdb_breakpoint $func allow-pending]} {
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return
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}
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set test "reach"
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set test_displacement "seen displacement message as $displacement"
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set debug_state_count 0
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gdb_test_multiple $command $test {
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-re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
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# Missing "$gdb_prompt $" is intentional.
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if {$expect_out(1,string) == "0x0"} {
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set case "ZERO"
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} else {
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set case "NONZERO"
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}
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if {$displacement == $case || $displacement == "PRESENT"} {
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pass $test_displacement
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set displacement "FOUND-$displacement"
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} else {
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fail $test_displacement
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}
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exp_continue
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}
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-re "Breakpoint \[0-9\]+, \\.?(__GI_)?$func \\(.*\\) at .*:\[0-9\]+\r\n.*$gdb_prompt $" {
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if {$func == $solib_bp} {
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fail $test
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} else {
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pass $test
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}
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}
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-re "Breakpoint \[0-9\]+, \[0-9xa-f\]+ in \\.?(__GI_)?$func \\(\\).*\r\n$gdb_prompt $" {
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if {$func == $solib_bp} {
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fail $test
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} else {
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pass $test
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}
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}
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-re "Stopped due to (spurious )?shared library event.*\r\n$gdb_prompt $" {
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if {$func == $solib_bp} {
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if {$debug_state_count == 0} {
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# First stop does not yet relocate the _start function
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# descriptor on ppc64.
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set debug_state_count 1
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send_gdb "continue\n"
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exp_continue
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} else {
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pass $test
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}
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} else {
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fail $test
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}
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}
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}
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if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
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fail $test_displacement
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}
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if {$func == $solib_bp} {
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gdb_test_no_output "set stop-on-solib-events 0"
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}
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}
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# `runto' does not check we stopped really at the function we specified.
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# DISPLACEMENT can be "NONE" for no message to be present, "ZERO" for
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# displacement of 0 bytes to be present, "NONZERO" for displacement of non-0
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# bytes to be present and "PRESENT" if both "ZERO" and "NONZERO" are valid.
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proc reach {func command displacement} {
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with_test_prefix "reach-$func" {
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reach_1 $func $command $displacement
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}
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}
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proc test_core {file displacement} {
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with_test_prefix "core" {
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global srcdir subdir gdb_prompt expect_out
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set corefile [core_find $file {} "segv"]
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if {$corefile == ""} {
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return
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}
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gdb_exit
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gdb_start
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# Clear it to never find any separate debug infos in $debug_root.
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gdb_test_no_output "set debug-file-directory" \
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"set debug-file-directory for core"
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load $file
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# Print the "PIE (Position Independent Executable) displacement" message.
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gdb_test_no_output "set verbose on"
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set test "core loaded"
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set test_displacement "seen displacement message as $displacement"
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gdb_test_multiple "core-file $corefile" $test {
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-re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
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# Missing "$gdb_prompt $" is intentional.
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if {$expect_out(1,string) == "0x0"} {
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set case "ZERO"
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} else {
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set case "NONZERO"
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}
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if {$displacement == $case || $displacement == "PRESENT"} {
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pass $test_displacement
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set displacement "FOUND-$displacement"
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} else {
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fail $test_displacement
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}
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exp_continue
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}
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-re "Core was generated by .*\r\n#0 .*$gdb_prompt $" {
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# Do not check the binary filename as it may be truncated.
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pass $test
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}
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}
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if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
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fail $test_displacement
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}
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gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "core main bt"
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}
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}
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proc test_attach_gdb {file pid displacement prefix} {
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with_test_prefix "$prefix" {
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global gdb_prompt expect_out
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gdb_exit
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gdb_start
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# Print the "PIE (Position Independent Executable) displacement" message.
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gdb_test_no_output "set verbose on"
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gdb_test "file $file" "Reading symbols from .*done\\." "file"
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set test "attach"
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gdb_test_multiple "attach $pid" $test {
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-re "Attaching to (program: .*, )?process $pid\r\n" {
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# Missing "$gdb_prompt $" is intentional.
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pass $test
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}
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}
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set test "attach final prompt"
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set test_displacement "seen displacement message as $displacement"
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gdb_test_multiple "" $test {
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-re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
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# Missing "$gdb_prompt $" is intentional.
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if {$expect_out(1,string) == "0x0"} {
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set case "ZERO"
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} else {
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set case "NONZERO"
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}
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if {$displacement == $case || $displacement == "PRESENT"} {
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pass $test_displacement
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set displacement "FOUND-$displacement"
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} else {
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fail $test_displacement
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}
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exp_continue
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}
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-re "$gdb_prompt $" {
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pass $test
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}
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}
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if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
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fail $test_displacement
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}
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gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "attach main bt"
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gdb_exit
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}
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}
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proc test_attach {file displacement {relink_args ""}} {
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global board_info
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global exec
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gdb_exit
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set test "sleep function started"
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set command "${file} sleep"
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set test_spawn_id [remote_spawn host $command]
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if { $test_spawn_id < 0 || $test_spawn_id == "" } {
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perror "Spawning $command failed."
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fail $test
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return
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}
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set pid [spawn_id_get_pid $test_spawn_id]
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gdb_expect {
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-re "sleeping\r\n" {
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pass $test
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}
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eof {
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fail "$test (eof)"
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wait -i $test_spawn_id
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return
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}
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timeout {
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fail "$test (timeout)"
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kill_wait_spawned_process $test_spawn_id
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return
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}
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}
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if {$relink_args == ""} {
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test_attach_gdb $exec $pid $displacement "attach"
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} else {
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# These could be rather passed as arguments.
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global interp_saved interp
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foreach relink {YES NO} {
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# Formerly this test was testing only prelinking of $EXEC. As the
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# prelink command automatically prelinks all of $EXEC's libraries,
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# even $INTERP got prelinked. Therefore, we formerly had to
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# `[file_copy $interp_saved $interp]' to make $INTERP not affected
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# by this prelinking of $EXEC.
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#
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# But now we need to test even prelinking of $INTERP. We could
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# create a separate test to test just the $INTERP prelinking. For
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# test simplicity, we merged this test and the test above by not
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# restoring $INTERP after $EXEC prelink. $INTERP gets restored
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# later below.
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#
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# `(wrong library or version mismatch?)' messages are printed for
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# $binfile_lib on platforms converting REL->RELA relocations by
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# prelink (such as on i386). There is no reliable way to verify
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# the library file matches the running library in such case but
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# GDB at least attempts to set the right displacement. We test
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# `libfunc' is present in the backtrace and therefore the
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# displacement has been guessed right.
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if [prelink$relink $relink_args [file tail $exec]] {
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# /proc/PID/exe cannot be loaded as it is "EXECNAME (deleted)".
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test_attach_gdb $exec $pid $displacement "attach-relink$relink"
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}
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}
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file_copy $interp_saved $interp
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}
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kill_wait_spawned_process $test_spawn_id
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}
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proc test_ld {file ifmain trynosym displacement} {
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global srcdir subdir gdb_prompt expect_out inferior_exited_re solib_bp
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# First test normal `file'-command loaded $FILE with symbols.
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gdb_exit
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gdb_start
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# Clear it to never find any separate debug infos in $debug_root.
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gdb_test_no_output "set debug-file-directory"
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load $file
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# Print the "PIE (Position Independent Executable) displacement" message.
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gdb_test_no_output "set verbose on"
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# We want to test the re-run of a PIE in the case where the executable
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# is loaded with a different displacement, but disable-randomization
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# prevents that from happening. So turn it off.
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gdb_test "set disable-randomization off"
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if $ifmain {
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gdb_test_no_output "set args segv"
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} else {
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global binfile_test
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# ld.so needs some executable to run to reach _dl_debug_state.
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gdb_test_no_output "set args [standard_output_file $binfile_test]" \
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"set args OBJDIR/${subdir}/$binfile_test"
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}
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reach $solib_bp "run" $displacement
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gdb_test "bt" "#0 +\[^\r\n\]*\\m(__GI_)?$solib_bp\\M.*" "dl bt"
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if $ifmain {
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reach "main" continue "NONE"
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reach "libfunc" continue "NONE"
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gdb_test "bt" "#0 +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#1 +\[^\r\n\]*\\mmain\\M.*" "main bt"
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}
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# Try re-run if the new PIE displacement takes effect.
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gdb_test "kill" "" "kill" {Kill the program being debugged\? \(y or n\) } "y"
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reach $solib_bp "run" $displacement
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if $ifmain {
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test_core $file $displacement
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test_attach $file $displacement
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}
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if !$trynosym {
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return
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}
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with_test_prefix "symbol-less" {
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# Test also `exec-file'-command loaded $FILE - therefore
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# without symbols. SYMBOL_OBJFILE is not available and only
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# EXEC_BFD must be used.
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gdb_exit
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gdb_start
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# Clear it to never find any separate debug infos in $debug_root.
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gdb_test_no_output "set debug-file-directory"
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gdb_reinitialize_dir $srcdir/$subdir
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# Print the "PIE (Position Independent Executable)
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# displacement" message.
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gdb_test_no_output "set verbose on"
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# Test no (error) message has been printed by `exec-file'.
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set escapedfile [string_to_regexp $file]
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gdb_test "exec-file $file" "exec-file $escapedfile" "load"
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if $ifmain {
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reach $solib_bp run $displacement
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# Use two separate gdb_test_multiple statements to avoid timeouts due
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# to slow processing of wildcard capturing long output
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set test "info files"
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set entrynohex ""
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gdb_test_multiple $test $test {
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-re "\r\n\[\t \]*Entry point:\[\t \]*0x(\[0-9a-f\]+)\r\n" {
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set entrynohex $expect_out(1,string)
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gdb_test_multiple "" $test {
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-re "\r\n$gdb_prompt $" {
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pass $test
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}
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}
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}
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}
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# `info sym' cannot be tested for .opd as the binary may not have
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# symbols.
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if {[istarget powerpc64-*] && [is_lp64_target]} {
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set test "convert entry point"
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gdb_test_multiple "p *(void(*)(void) *) 0x$entrynohex" $test {
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-re " =( \\(\[^0-9\]*\\))? 0x(\[0-9a-f\]+)( < \[^\r\n\]*)?\r\n$gdb_prompt $" {
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set entrynohex $expect_out(2,string)
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pass $test
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}
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}
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}
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if {$entrynohex != ""} {
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gdb_test "break *0x$entrynohex" "" "break at entry point"
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gdb_test "continue" "\r\nBreakpoint \[0-9\]+, 0x0*$entrynohex in .*" "entry point reached"
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}
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} else {
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# There is no symbol to break at ld.so. Moreover it can
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# exit with an error code.
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set test "ld.so exit"
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set test_displacement "seen displacement message as $displacement"
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gdb_test_multiple "run" $test {
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-re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
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# Missing "$gdb_prompt $" is intentional.
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if {$expect_out(1,string) == "0x0"} {
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set case "ZERO"
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} else {
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set case "NONZERO"
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}
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if {$displacement == $case || $displacement == "PRESENT"} {
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pass $test_displacement
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set displacement "FOUND-$displacement"
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} else {
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fail $test_displacement
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}
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exp_continue
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}
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-re "$inferior_exited_re (normally|with code \[0-9\]+).\r\n$gdb_prompt $" {
|
|
# Do not check the binary filename as it may be truncated.
|
|
pass $test
|
|
}
|
|
}
|
|
if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
|
|
fail $test_displacement
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
# Create separate binaries for each testcase - to make the possible reported
|
|
# problem reproducible after the whole test run finishes.
|
|
|
|
foreach ldprelink {NO YES} {
|
|
foreach ldsepdebug {NO IN SEP} {
|
|
# Skip running the ldsepdebug test if we do not have system separate
|
|
# debug info available.
|
|
if {$interp_system_debug == "" && $ldsepdebug == "SEP"} {
|
|
continue
|
|
}
|
|
|
|
set ldname "LDprelink${ldprelink}debug${ldsepdebug}"
|
|
set interp $binprefix-$ldname
|
|
|
|
# prelink needs to always prelink all the dependencies to do any file
|
|
# modifications of its files. ld.so also needs all the dependencies to
|
|
# be prelinked to omit the relocation process. In-memory file offsets
|
|
# are not dependent whether ld.so went the prelink way or through the
|
|
# relocation process.
|
|
#
|
|
# For GDB we are not interested whether prelink succeeds as it is
|
|
# transparent to GDB. GDB is being tested for differences of file
|
|
# offsets vs. in-memory offsets. So we have to prelink even ld.so for
|
|
# the BIN modification to happen but we need to restore the original
|
|
# possibly unprelinked ld.so to test all the combinations for GDB.
|
|
set interp_saved ${interp}-saved
|
|
|
|
with_test_prefix "$ldname" {
|
|
if {$ldsepdebug == "NO"} {
|
|
file_copy $interp_system $interp
|
|
# Never call strip-debug before unprelink:
|
|
# prelink: ...: Section .note.gnu.build-id created after prelinking
|
|
if ![prelinkNO $interp] {
|
|
continue
|
|
}
|
|
strip_debug $interp
|
|
} elseif {$ldsepdebug == "IN" && $interp_system_debug == ""} {
|
|
file_copy $interp_system $interp
|
|
} elseif {$ldsepdebug == "IN" && $interp_system_debug != ""} {
|
|
file_copy $interp_system $interp
|
|
file_copy $interp_system_debug "${interp}.debug"
|
|
# eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
|
|
if {![prelinkNO $interp] || ![prelinkNO "${interp}.debug"]} {
|
|
continue
|
|
}
|
|
set test "eu-unstrip unprelinked:[file tail $interp_system] + [file tail $interp_system_debug] to [file tail $interp]"
|
|
set command "exec eu-unstrip -o $interp $interp ${interp}.debug"
|
|
verbose -log "command is $command"
|
|
if [catch $command] {
|
|
setup_xfail *-*-*
|
|
fail $test
|
|
continue
|
|
} else {
|
|
pass $test
|
|
}
|
|
} elseif {$ldsepdebug == "SEP" && $interp_system_debug == ""} {
|
|
file_copy $interp_system $interp
|
|
# eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
|
|
if ![prelinkNO $interp] {
|
|
continue
|
|
}
|
|
gdb_gnu_strip_debug $interp
|
|
} elseif {$ldsepdebug == "SEP" && $interp_system_debug != ""} {
|
|
file_copy $interp_system $interp
|
|
file_copy $interp_system_debug "${interp}.debug"
|
|
}
|
|
|
|
if {$ldsepdebug == "SEP"} {
|
|
if ![prelinkNO "${interp}.debug"] {
|
|
continue
|
|
}
|
|
} else {
|
|
file delete "${interp}.debug"
|
|
}
|
|
|
|
if ![prelink$ldprelink $interp] {
|
|
continue
|
|
}
|
|
if {$ldprelink == "NO"} {
|
|
set displacement "NONZERO"
|
|
} else {
|
|
# x86* kernel loads prelinked PIE binary at its
|
|
# prelinked address but ppc* kernel loads it at a
|
|
# random address. prelink normally skips PIE binaries
|
|
# during the system scan.
|
|
set displacement "PRESENT"
|
|
}
|
|
test_ld $interp 0 [expr {$ldsepdebug == "NO"}] $displacement
|
|
|
|
if ![file_copy $interp $interp_saved] {
|
|
continue
|
|
}
|
|
|
|
foreach binprelink {NO YES} {
|
|
foreach binsepdebug {NO IN SEP} {
|
|
# "ATTACH" is like "YES" but it is modified during
|
|
# run. It cannot be used for problem
|
|
# reproducibility after the testcase ends.
|
|
foreach binpie {NO YES ATTACH} {
|
|
# This combination is not possible, non-PIE (fixed address)
|
|
# binary cannot be prelinked to any (other) address.
|
|
if {$binprelink == "YES" && $binpie == "NO"} {
|
|
continue
|
|
}
|
|
|
|
set binname "BINprelink${binprelink}debug${binsepdebug}pie${binpie}"
|
|
set exec $binprefix-$binname
|
|
|
|
with_test_prefix "$binname" {
|
|
set opts "ldflags=-Wl,$binfile_lib,-rpath,[file dirname $binfile_lib]"
|
|
if {$binsepdebug != "NO"} {
|
|
lappend opts {debug}
|
|
}
|
|
if {$binpie != "NO"} {
|
|
lappend opts {additional_flags=-fPIE -pie}
|
|
}
|
|
|
|
set dir ${exec}.d
|
|
set relink_args [build_executable_own_libs ${test}.exp [file tail $exec] $srcfile $opts $interp $dir]
|
|
if {$relink_args == ""} {
|
|
continue
|
|
}
|
|
|
|
if {$binsepdebug == "SEP"} {
|
|
gdb_gnu_strip_debug $exec
|
|
}
|
|
|
|
if {$binpie == "NO"} {
|
|
set displacement "NONE"
|
|
} elseif {$binprelink == "NO"} {
|
|
set displacement "NONZERO"
|
|
} else {
|
|
# x86* kernel loads prelinked PIE binary at its prelinked
|
|
# address but ppc* kernel loads it at a random address.
|
|
# prelink normally skips PIE binaries during the system scan.
|
|
set displacement "PRESENT"
|
|
}
|
|
|
|
if {[prelink$binprelink $relink_args [file tail $exec]]
|
|
&& [file_copy $interp_saved $interp]} {
|
|
if {$binpie != "ATTACH"} {
|
|
test_ld $exec 1 [expr {$binsepdebug == "NO"}] $displacement
|
|
} else {
|
|
# If the file has been randomly prelinked it must be
|
|
# "NONZERO". We could see "ZERO" only if it was unprelinked
|
|
# and it is now running at the same address - which is 0 but
|
|
# executable can never run at address 0.
|
|
|
|
set displacement "NONZERO"
|
|
test_attach $exec $displacement $relink_args
|
|
|
|
# ATTACH means that executables and libraries have been
|
|
# modified after they have been run. They cannot be reused
|
|
# for problem reproducibility after the testcase ends in
|
|
# the ATTACH case. Therefore they are rather deleted not
|
|
# to confuse after the run finishes.
|
|
set exec_debug [system_debug_get $exec]
|
|
if {$exec_debug != ""} {
|
|
# `file delete [glob "${exec_debug}*"]' does not work.
|
|
foreach f [glob "${exec_debug}*"] {
|
|
file delete $f
|
|
}
|
|
}
|
|
file delete -force $dir
|
|
# `file delete [glob "${exec}*"]' does not work.
|
|
foreach f [glob "${exec}*"] {
|
|
file delete $f
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
file delete $interp_saved
|
|
}
|
|
}
|
|
}
|