1 # Copyright 2010 Free Software Foundation, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 3 of the License, or
6 # (at your option) any later version.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
16 # This test only works on GNU/Linux.
17 if { ![isnative] || [is_remote host] || ![istarget *-linux*] || [skip_shlib_tests]} {
21 load_lib prelink-support.exp
23 set test "break-interp"
24 set binprefix ${objdir}/${subdir}/${test}
25 # Only to get the $interp_system name.
26 set srcfile_test "start.c"
27 set binfile_test ${test}-test
28 set binfile_lib ${objdir}/${subdir}/${test}.so
29 set srcfile "${test}-main.c"
30 set srcfile_lib "${test}-lib.c"
32 if [get_compiler_info ${binfile_lib}] {
36 # Use -soname so that the new library gets copied by build_executable_own_libs.
38 if {[gdb_compile_shlib ${srcdir}/${subdir}/${srcfile_lib} ${binfile_lib} [list debug ldflags=-Wl,-soname,${test}.so]] != ""} {
42 if {[build_executable ${test}.exp $binfile_test ${srcfile_test} {}] == -1} {
46 # Note: The separate debug info file content build-id/crc32 are not verified
47 # contrary to the GDB search algorithm skipping non-matching ones.
48 proc system_debug_get {exec} {
51 set exec_build_id_debug [build_id_debug_filename_get $exec]
52 set debug_base "[file tail $exec].debug"
53 set exec_dir [file dirname $exec]
55 # isfile returns 1 even for symlinks to files.
56 set retval $debug_root/$exec_build_id_debug
57 if [file isfile $retval] {
60 set retval $exec_dir/$debug_base
61 if [file isfile $retval] {
64 set retval $exec_dir/.debug/$debug_base
65 if [file isfile $retval] {
68 set retval $debug_root/$exec_dir/$debug_base
69 if [file isfile $retval] {
78 set test "show debug-file-directory"
79 gdb_test_multiple $test $test {
80 -re "The directory where separate debug symbols are searched for is \"(.*)\".\r\n$gdb_prompt $" {
81 set debug_root $expect_out(1,string)
85 set interp_system [section_get ${objdir}/${subdir}/$binfile_test .interp]
86 set interp_system_debug [system_debug_get $interp_system]
87 verbose -log "$interp_system has debug $interp_system_debug"
89 proc prelinkNO {arg {name ""}} {
90 return [prelink_no $arg $name]
93 proc prelinkYES {arg {name ""}} {
94 return [prelink_yes $arg $name]
97 proc strip_debug {dest} {
98 set test "strip [file tail $dest]"
99 set strip_program [transform strip]
100 set command "exec $strip_program --strip-debug $dest"
101 verbose -log "command is $command"
102 if [catch $command] {
111 # Implementation of reach.
113 proc reach_1 {func command displacement} {
114 global gdb_prompt expect_out
116 if {$func == "_dl_debug_state"} {
117 # Breakpoint on _dl_debug_state can have problems due to its overlap
118 # with the existing internal breakpoint from GDB.
119 gdb_test_no_output "set stop-on-solib-events 1"
120 } elseif {! [gdb_breakpoint $func allow-pending]} {
125 set test_displacement "seen displacement message as $displacement"
126 set debug_state_count 0
127 gdb_test_multiple $command $test {
128 -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
129 # Missing "$gdb_prompt $" is intentional.
130 if {$expect_out(1,string) == "0x0"} {
135 if {$displacement == $case || $displacement == "PRESENT"} {
136 pass $test_displacement
137 set displacement "FOUND-$displacement"
139 fail $test_displacement
143 -re "Breakpoint \[0-9\]+, \\.?$func \\(.*\\) at .*:\[0-9\]+\r\n.*$gdb_prompt $" {
144 if {$func == "_dl_debug_state"} {
150 -re "Breakpoint \[0-9\]+, \[0-9xa-f\]+ in \\.?$func \\(\\).*\r\n$gdb_prompt $" {
151 if {$func == "_dl_debug_state"} {
157 -re "Stopped due to shared library event\r\n$gdb_prompt $" {
158 if {$func == "_dl_debug_state"} {
159 if {$debug_state_count == 0} {
160 # First stop does not yet relocate the _start function
161 # descriptor on ppc64.
162 set debug_state_count 1
163 send_gdb "continue\n"
173 if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
174 fail $test_displacement
177 if {$func == "_dl_debug_state"} {
178 gdb_test_no_output "set stop-on-solib-events 0"
182 # `runto' does not check we stopped really at the function we specified.
183 # DISPLACEMENT can be "NONE" for no message to be present, "ZERO" for
184 # displacement of 0 bytes to be present, "NONZERO" for displacement of non-0
185 # bytes to be present and "PRESENT" if both "ZERO" and "NONZERO" are valid.
186 proc reach {func command displacement} {
188 set old_ldprefix $pf_prefix
189 lappend pf_prefix "reach-$func:"
191 reach_1 $func $command $displacement
193 set pf_prefix $old_ldprefix
196 proc test_core {file displacement} {
197 global srcdir subdir gdb_prompt expect_out
199 set corefile [core_find $file {} "segv"]
200 if {$corefile == ""} {
205 set old_ldprefix $pf_prefix
206 lappend pf_prefix "core:"
210 # Clear it to never find any separate debug infos in $debug_root.
211 gdb_test_no_output "set debug-file-directory" \
212 "set debug-file-directory for core"
213 gdb_reinitialize_dir $srcdir/$subdir
216 # Print the "PIE (Position Independent Executable) displacement" message.
217 gdb_test_no_output "set verbose on"
219 set test "core loaded"
220 set test_displacement "seen displacement message as $displacement"
221 gdb_test_multiple "core-file $corefile" $test {
222 -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
223 # Missing "$gdb_prompt $" is intentional.
224 if {$expect_out(1,string) == "0x0"} {
229 if {$displacement == $case || $displacement == "PRESENT"} {
230 pass $test_displacement
231 set displacement "FOUND-$displacement"
233 fail $test_displacement
237 -re "Core was generated by .*\r\n#0 .*$gdb_prompt $" {
238 # Do not check the binary filename as it may be truncated.
242 if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
243 fail $test_displacement
246 gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "core main bt"
248 set pf_prefix $old_ldprefix
251 proc test_attach_gdb {file pid displacement prefix} {
252 global gdb_prompt expect_out
255 set old_ldprefix $pf_prefix
256 lappend pf_prefix "$prefix:"
261 # Print the "PIE (Position Independent Executable) displacement" message.
262 gdb_test_no_output "set verbose on"
265 gdb_test "file $file" "Reading symbols from .*done\\." "file"
269 gdb_test_multiple "attach $pid" $test {
270 -re "Attaching to (program: .*, )?process $pid\r\n" {
271 # Missing "$gdb_prompt $" is intentional.
276 set test "attach final prompt"
277 set test_displacement "seen displacement message as $displacement"
278 gdb_test_multiple "" $test {
279 -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
280 # Missing "$gdb_prompt $" is intentional.
281 if {$expect_out(1,string) == "0x0"} {
286 if {$displacement == $case || $displacement == "PRESENT"} {
287 pass $test_displacement
288 set displacement "FOUND-$displacement"
290 fail $test_displacement
294 -re "$gdb_prompt $" {
298 if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
299 fail $test_displacement
302 gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "attach main bt"
305 set pf_prefix $old_ldprefix
308 proc test_attach {file displacement {relink_args ""}} {
313 set test "sleep function started"
315 set command "${file} sleep"
316 set res [remote_spawn host $command];
317 if { $res < 0 || $res == "" } {
318 perror "Spawning $command failed."
322 set pid [exp_pid -i $res]
332 fail "$test (timeout)"
337 if {$relink_args == ""} {
338 test_attach_gdb "" $pid $displacement "attach"
340 # These could be rather passed as arguments.
341 global exec interp_saved interp
343 foreach relink {YES NO} {
344 # Formerly this test was testing only prelinking of $EXEC. As the
345 # prelink command automatically prelinks all of $EXEC's libraries,
346 # even $INTERP got prelinked. Therefore, we formerly had to
347 # `[file_copy $interp_saved $interp]' to make $INTERP not affected
348 # by this prelinking of $EXEC.
350 # But now we need to test even prelinking of $INTERP. We could
351 # create a separate test to test just the $INTERP prelinking. For
352 # test simplicity, we merged this test and the test above by not
353 # restoring $INTERP after $EXEC prelink. $INTERP gets restored
356 if [prelink$relink $relink_args [file tail $exec]] {
357 # /proc/PID/exe cannot be loaded as it is "EXECNAME (deleted)".
358 test_attach_gdb $exec $pid $displacement "attach-relink$relink"
361 file_copy $interp_saved $interp
364 remote_exec host "kill -9 $pid"
367 proc test_ld {file ifmain trynosym displacement} {
368 global srcdir subdir gdb_prompt expect_out
370 # First test normal `file'-command loaded $FILE with symbols.
374 # Clear it to never find any separate debug infos in $debug_root.
375 gdb_test_no_output "set debug-file-directory"
376 gdb_reinitialize_dir $srcdir/$subdir
379 # Print the "PIE (Position Independent Executable) displacement" message.
380 gdb_test_no_output "set verbose on"
382 # We want to test the re-run of a PIE in the case where the executable
383 # is loaded with a different displacement, but disable-randomization
384 # prevents that from happening. So turn it off.
385 gdb_test "set disable-randomization off"
388 gdb_test_no_output "set args segv"
390 global objdir binfile_test
392 # ld.so needs some executable to run to reach _dl_debug_state.
393 gdb_test_no_output "set args ${objdir}/${subdir}/$binfile_test"
396 reach "_dl_debug_state" "run" $displacement
398 gdb_test "bt" "#0 +\[^\r\n\]*\\m_dl_debug_state\\M.*" "dl bt"
401 reach "main" continue "NONE"
403 reach "libfunc" continue "NONE"
405 gdb_test "bt" "#0 +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#1 +\[^\r\n\]*\\mmain\\M.*" "main bt"
408 # Try re-run if the new PIE displacement takes effect.
409 gdb_test "kill" "" "kill" {Kill the program being debugged\? \(y or n\) } "y"
410 reach "_dl_debug_state" "run" $displacement
413 test_core $file $displacement
415 test_attach $file $displacement
423 set old_ldprefix $pf_prefix
424 lappend pf_prefix "symbol-less:"
426 # Test also `exec-file'-command loaded $FILE - therefore without symbols.
427 # SYMBOL_OBJFILE is not available and only EXEC_BFD must be used.
431 # Clear it to never find any separate debug infos in $debug_root.
432 gdb_test_no_output "set debug-file-directory"
433 gdb_reinitialize_dir $srcdir/$subdir
435 # Print the "PIE (Position Independent Executable) displacement" message.
436 gdb_test_no_output "set verbose on"
438 # Test no (error) message has been printed by `exec-file'.
439 set escapedfile [string_to_regexp $file]
440 gdb_test "exec-file $file" "exec-file $escapedfile" "load"
443 reach "_dl_debug_state" run $displacement
445 # Use two separate gdb_test_multiple statements to avoid timeouts due
446 # to slow processing of wildcard capturing long output
447 set test "info files"
449 gdb_test_multiple $test $test {
450 -re "\r\n\[\t \]*Entry point:\[\t \]*0x(\[0-9a-f\]+)\r\n" {
451 set entrynohex $expect_out(1,string)
452 gdb_test_multiple "" $test {
453 -re "\r\n$gdb_prompt $" {
460 # `info sym' cannot be tested for .opd as the binary may not have
462 if {[istarget powerpc64-*] && [is_lp64_target]} {
463 set test "convert entry point"
464 gdb_test_multiple "p *(void(*)(void) *) 0x$entrynohex" $test {
465 -re " =( \\(\[^0-9\]*\\))? 0x(\[0-9a-f\]+)( < \[^\r\n\]*)?\r\n$gdb_prompt $" {
466 set entrynohex $expect_out(2,string)
471 if {$entrynohex != ""} {
472 gdb_test "break *0x$entrynohex" "" "break at entry point"
473 gdb_test "continue" "\r\nBreakpoint \[0-9\]+, 0x0*$entrynohex in .*" "entry point reached"
476 # There is no symbol to break at ld.so. Moreover it can exit with an
479 set test "ld.so exit"
480 set test_displacement "seen displacement message as $displacement"
481 gdb_test_multiple "run" $test {
482 -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
483 # Missing "$gdb_prompt $" is intentional.
484 if {$expect_out(1,string) == "0x0"} {
489 if {$displacement == $case || $displacement == "PRESENT"} {
490 pass $test_displacement
491 set displacement "FOUND-$displacement"
493 fail $test_displacement
497 -re "Program exited (normally|with code \[0-9\]+)\\.\r\n$gdb_prompt $" {
498 # Do not check the binary filename as it may be truncated.
502 if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
503 fail $test_displacement
507 set pf_prefix $old_ldprefix
510 # Create separate binaries for each testcase - to make the possible reported
511 # problem reproducible after the whole test run finishes.
513 set old_ldprefix $pf_prefix
514 foreach ldprelink {NO YES} {
515 foreach ldsepdebug {NO IN SEP} {
516 # Skip running the ldsepdebug test if we do not have system separate
517 # debug info available.
518 if {$interp_system_debug == "" && $ldsepdebug == "SEP"} {
522 set ldname "LDprelink${ldprelink}debug${ldsepdebug}"
523 set interp $binprefix-$ldname
525 # prelink needs to always prelink all the dependencies to do any file
526 # modifications of its files. ld.so also needs all the dependencies to
527 # be prelinked to omit the relocation process. In-memory file offsets
528 # are not dependent whether ld.so went the prelink way or through the
529 # relocation process.
531 # For GDB we are not interested whether prelink succeeds as it is
532 # transparent to GDB. GDB is being tested for differences of file
533 # offsets vs. in-memory offsets. So we have to prelink even ld.so for
534 # the BIN modification to happen but we need to restore the original
535 # possibly unprelinked ld.so to test all the combinations for GDB.
536 set interp_saved ${interp}-saved
538 set pf_prefix $old_ldprefix
539 lappend pf_prefix "$ldname:"
541 if {$ldsepdebug == "NO"} {
542 file_copy $interp_system $interp
543 # Never call strip-debug before unprelink:
544 # prelink: ...: Section .note.gnu.build-id created after prelinking
545 if ![prelinkNO $interp] {
549 } elseif {$ldsepdebug == "IN" && $interp_system_debug == ""} {
550 file_copy $interp_system $interp
551 } elseif {$ldsepdebug == "IN" && $interp_system_debug != ""} {
552 file_copy $interp_system $interp
553 file_copy $interp_system_debug "${interp}.debug"
554 # eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
555 if {![prelinkNO $interp] || ![prelinkNO "${interp}.debug"]} {
558 set test "eu-unstrip unprelinked:[file tail $interp_system] + [file tail $interp_system_debug] to [file tail $interp]"
559 set command "exec eu-unstrip -o $interp $interp ${interp}.debug"
560 verbose -log "command is $command"
561 if [catch $command] {
568 } elseif {$ldsepdebug == "SEP" && $interp_system_debug == ""} {
569 file_copy $interp_system $interp
570 # eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
571 if ![prelinkNO $interp] {
574 gdb_gnu_strip_debug $interp
575 } elseif {$ldsepdebug == "SEP" && $interp_system_debug != ""} {
576 file_copy $interp_system $interp
577 file_copy $interp_system_debug "${interp}.debug"
580 if {$ldsepdebug == "SEP"} {
581 if ![prelinkNO "${interp}.debug"] {
585 file delete "${interp}.debug"
588 if ![prelink$ldprelink $interp] {
591 if {$ldprelink == "NO"} {
592 set displacement "NONZERO"
594 # x86* kernel loads prelinked PIE binary at its prelinked address
595 # but ppc* kernel loads it at a random address. prelink normally
596 # skips PIE binaries during the system scan.
597 set displacement "PRESENT"
599 test_ld $interp 0 [expr {$ldsepdebug == "NO"}] $displacement
601 if ![file_copy $interp $interp_saved] {
604 set old_binprefix $pf_prefix
605 foreach binprelink {NO YES} {
606 foreach binsepdebug {NO IN SEP} {
607 # "ATTACH" is like "YES" but it is modified during run.
608 # It cannot be used for problem reproducibility after the
610 foreach binpie {NO YES ATTACH} {
611 # This combination is not possible, non-PIE (fixed address)
612 # binary cannot be prelinked to any (other) address.
613 if {$binprelink == "YES" && $binpie == "NO"} {
617 set binname "BINprelink${binprelink}debug${binsepdebug}pie${binpie}"
618 set exec $binprefix-$binname
620 set pf_prefix $old_binprefix
621 lappend pf_prefix "$binname:"
623 set opts "ldflags=-Wl,$binfile_lib,-rpath,[file dirname $binfile_lib]"
624 if {$binsepdebug != "NO"} {
627 if {$binpie != "NO"} {
628 lappend opts {additional_flags=-fPIE -pie}
632 set relink_args [build_executable_own_libs ${test}.exp [file tail $exec] $srcfile $opts $interp $dir]
633 if {$relink_args == ""} {
637 if {$binsepdebug == "SEP"} {
638 gdb_gnu_strip_debug $exec
641 if {$binpie == "NO"} {
642 set displacement "NONE"
643 } elseif {$binprelink == "NO"} {
644 set displacement "NONZERO"
646 # x86* kernel loads prelinked PIE binary at its
647 # prelinked address but ppc* kernel loads it at
648 # a random address. prelink normally skips PIE
649 # binaries during the system scan.
650 set displacement "PRESENT"
653 if {[prelink$binprelink $relink_args [file tail $exec]]
654 && [file_copy $interp_saved $interp]} {
655 if {$binpie != "ATTACH"} {
656 test_ld $exec 1 [expr {$binsepdebug == "NO"}] $displacement
658 # If the file has been randomly prelinked it must
659 # be "NONZERO". We could see "ZERO" only if it was
660 # unprelinked and it is now running at the same
661 # address - which is 0 but executable can never run
664 set displacement "NONZERO"
665 test_attach $exec $displacement $relink_args
667 # ATTACH means that executables and libraries have
668 # been modified after they have been run. They
669 # cannot be reused for problem reproducibility after
670 # the testcase ends in the ATTACH case. Therefore
671 # they are rather deleted not to confuse after the
673 set exec_debug [system_debug_get $exec]
674 if {$exec_debug != ""} {
675 # `file delete [glob "${exec_debug}*"]' does not work.
676 foreach f [glob "${exec_debug}*"] {
680 file delete -force $dir
681 # `file delete [glob "${exec}*"]' does not work.
682 foreach f [glob "${exec}*"] {
691 file delete $interp_saved
694 set pf_prefix $old_ldprefix