1 # Copyright 2010-2016 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] || [target_info exists use_gdb_stub]
18 || ![istarget *-linux*] || [skip_shlib_tests]} {
22 load_lib prelink-support.exp
24 set test "break-interp"
25 set binprefix [standard_output_file ${test}]
26 # Only to get the $interp_system name.
27 set srcfile_test "start.c"
28 set binfile_test ${test}-test
29 set binfile_lib ${binprefix}.so
30 set srcfile "${test}-main.c"
31 set srcfile_lib "${test}-lib.c"
33 if [get_compiler_info] {
37 # Use -soname so that the new library gets copied by build_executable_own_libs.
39 if {[gdb_compile_shlib ${srcdir}/${subdir}/${srcfile_lib} ${binfile_lib} [list debug ldflags=-Wl,-soname,${test}.so]] != ""} {
43 if {[build_executable ${test}.exp $binfile_test ${srcfile_test} {}] == -1} {
47 # Note: The separate debug info file content build-id/crc32 are not verified
48 # contrary to the GDB search algorithm skipping non-matching ones.
49 proc system_debug_get {exec} {
52 set exec_build_id_debug [build_id_debug_filename_get $exec]
53 set debug_base "[file tail $exec].debug"
54 set exec_dir [file dirname $exec]
56 # isfile returns 1 even for symlinks to files.
57 set retval $debug_root/$exec_build_id_debug
58 if [file isfile $retval] {
61 set retval $exec_dir/$debug_base
62 if [file isfile $retval] {
65 set retval $exec_dir/.debug/$debug_base
66 if [file isfile $retval] {
69 set retval $debug_root/$exec_dir/$debug_base
70 if [file isfile $retval] {
79 set test "show debug-file-directory"
80 gdb_test_multiple $test $test {
81 -re "The directory where separate debug symbols are searched for is \"(.*)\".\r\n$gdb_prompt $" {
82 set debug_root $expect_out(1,string)
86 set interp_system [section_get [standard_output_file $binfile_test] .interp]
87 set interp_system_debug [system_debug_get $interp_system]
88 verbose -log "$interp_system has debug $interp_system_debug"
90 proc prelinkNO {arg {name ""}} {
91 return [prelink_no $arg $name]
94 proc prelinkYES {arg {name ""}} {
95 return [prelink_yes $arg $name]
98 proc strip_debug {dest} {
99 set test "strip [file tail $dest]"
100 set strip_program [transform strip]
101 set command "exec $strip_program --strip-debug $dest"
102 verbose -log "command is $command"
103 if [catch $command] {
112 # The marker function for the standard runtime linker interface is
113 # _dl_debug_state. The probes-based interface has no specific marker
114 # function; the probe we will stop on (init_start) is in dl_main so we
117 set solib_bp {(_dl_debug_state|dl_main)}
119 # Implementation of reach.
121 proc reach_1 {func command displacement} {
122 global gdb_prompt expect_out solib_bp
124 if {$func == $solib_bp} {
125 # Breakpoint on _dl_debug_state can have problems due to its overlap
126 # with the existing internal breakpoint from GDB.
127 gdb_test_no_output "set stop-on-solib-events 1"
128 } elseif {! [gdb_breakpoint $func allow-pending]} {
133 set test_displacement "seen displacement message as $displacement"
134 set debug_state_count 0
135 gdb_test_multiple $command $test {
136 -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
137 # Missing "$gdb_prompt $" is intentional.
138 if {$expect_out(1,string) == "0x0"} {
143 if {$displacement == $case || $displacement == "PRESENT"} {
144 pass $test_displacement
145 set displacement "FOUND-$displacement"
147 fail $test_displacement
151 -re "Breakpoint \[0-9\]+, \\.?(__GI_)?$func \\(.*\\) at .*:\[0-9\]+\r\n.*$gdb_prompt $" {
152 if {$func == $solib_bp} {
158 -re "Breakpoint \[0-9\]+, \[0-9xa-f\]+ in \\.?(__GI_)?$func \\(\\).*\r\n$gdb_prompt $" {
159 if {$func == $solib_bp} {
165 -re "Stopped due to (spurious )?shared library event.*\r\n$gdb_prompt $" {
166 if {$func == $solib_bp} {
167 if {$debug_state_count == 0} {
168 # First stop does not yet relocate the _start function
169 # descriptor on ppc64.
170 set debug_state_count 1
171 send_gdb "continue\n"
181 if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
182 fail $test_displacement
185 if {$func == $solib_bp} {
186 gdb_test_no_output "set stop-on-solib-events 0"
190 # `runto' does not check we stopped really at the function we specified.
191 # DISPLACEMENT can be "NONE" for no message to be present, "ZERO" for
192 # displacement of 0 bytes to be present, "NONZERO" for displacement of non-0
193 # bytes to be present and "PRESENT" if both "ZERO" and "NONZERO" are valid.
194 proc reach {func command displacement} {
195 with_test_prefix "reach-$func" {
196 reach_1 $func $command $displacement
200 proc test_core {file displacement} {
201 with_test_prefix "core" {
202 global srcdir subdir gdb_prompt expect_out
204 set corefile [core_find $file {} "segv"]
205 if {$corefile == ""} {
211 # Clear it to never find any separate debug infos in $debug_root.
212 gdb_test_no_output "set debug-file-directory" \
213 "set debug-file-directory for core"
214 gdb_reinitialize_dir $srcdir/$subdir
217 # Print the "PIE (Position Independent Executable) displacement" message.
218 gdb_test_no_output "set verbose on"
220 set test "core loaded"
221 set test_displacement "seen displacement message as $displacement"
222 gdb_test_multiple "core-file $corefile" $test {
223 -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
224 # Missing "$gdb_prompt $" is intentional.
225 if {$expect_out(1,string) == "0x0"} {
230 if {$displacement == $case || $displacement == "PRESENT"} {
231 pass $test_displacement
232 set displacement "FOUND-$displacement"
234 fail $test_displacement
238 -re "Core was generated by .*\r\n#0 .*$gdb_prompt $" {
239 # Do not check the binary filename as it may be truncated.
243 if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
244 fail $test_displacement
247 gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "core main bt"
251 proc test_attach_gdb {file pid displacement prefix} {
252 with_test_prefix "$prefix" {
253 global gdb_prompt expect_out
258 # Print the "PIE (Position Independent Executable) displacement" message.
259 gdb_test_no_output "set verbose on"
261 gdb_test "file $file" "Reading symbols from .*done\\." "file"
264 gdb_test_multiple "attach $pid" $test {
265 -re "Attaching to (program: .*, )?process $pid\r\n" {
266 # Missing "$gdb_prompt $" is intentional.
271 set test "attach final prompt"
272 set test_displacement "seen displacement message as $displacement"
273 gdb_test_multiple "" $test {
274 -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
275 # Missing "$gdb_prompt $" is intentional.
276 if {$expect_out(1,string) == "0x0"} {
281 if {$displacement == $case || $displacement == "PRESENT"} {
282 pass $test_displacement
283 set displacement "FOUND-$displacement"
285 fail $test_displacement
289 -re "$gdb_prompt $" {
293 if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
294 fail $test_displacement
297 gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "attach main bt"
302 proc test_attach {file displacement {relink_args ""}} {
308 set test "sleep function started"
310 set command "${file} sleep"
311 set test_spawn_id [remote_spawn host $command]
312 if { $test_spawn_id < 0 || $test_spawn_id == "" } {
313 perror "Spawning $command failed."
317 set pid [spawn_id_get_pid $test_spawn_id]
324 wait -i $test_spawn_id
328 fail "$test (timeout)"
329 kill_wait_spawned_process $test_spawn_id
334 if {$relink_args == ""} {
335 test_attach_gdb $exec $pid $displacement "attach"
337 # These could be rather passed as arguments.
338 global interp_saved interp
340 foreach relink {YES NO} {
341 # Formerly this test was testing only prelinking of $EXEC. As the
342 # prelink command automatically prelinks all of $EXEC's libraries,
343 # even $INTERP got prelinked. Therefore, we formerly had to
344 # `[file_copy $interp_saved $interp]' to make $INTERP not affected
345 # by this prelinking of $EXEC.
347 # But now we need to test even prelinking of $INTERP. We could
348 # create a separate test to test just the $INTERP prelinking. For
349 # test simplicity, we merged this test and the test above by not
350 # restoring $INTERP after $EXEC prelink. $INTERP gets restored
353 # `(wrong library or version mismatch?)' messages are printed for
354 # $binfile_lib on platforms converting REL->RELA relocations by
355 # prelink (such as on i386). There is no reliable way to verify
356 # the library file matches the running library in such case but
357 # GDB at least attempts to set the right displacement. We test
358 # `libfunc' is present in the backtrace and therefore the
359 # displacement has been guessed right.
361 if [prelink$relink $relink_args [file tail $exec]] {
362 # /proc/PID/exe cannot be loaded as it is "EXECNAME (deleted)".
363 test_attach_gdb $exec $pid $displacement "attach-relink$relink"
366 file_copy $interp_saved $interp
369 kill_wait_spawned_process $test_spawn_id
372 proc test_ld {file ifmain trynosym displacement} {
373 global srcdir subdir gdb_prompt expect_out inferior_exited_re solib_bp
375 # First test normal `file'-command loaded $FILE with symbols.
379 # Clear it to never find any separate debug infos in $debug_root.
380 gdb_test_no_output "set debug-file-directory"
381 gdb_reinitialize_dir $srcdir/$subdir
384 # Print the "PIE (Position Independent Executable) displacement" message.
385 gdb_test_no_output "set verbose on"
387 # We want to test the re-run of a PIE in the case where the executable
388 # is loaded with a different displacement, but disable-randomization
389 # prevents that from happening. So turn it off.
390 gdb_test "set disable-randomization off"
393 gdb_test_no_output "set args segv"
397 # ld.so needs some executable to run to reach _dl_debug_state.
398 gdb_test_no_output "set args [standard_output_file $binfile_test]" \
399 "set args OBJDIR/${subdir}/$binfile_test"
402 reach $solib_bp "run" $displacement
404 gdb_test "bt" "#0 +\[^\r\n\]*\\m(__GI_)?$solib_bp\\M.*" "dl bt"
407 reach "main" continue "NONE"
409 reach "libfunc" continue "NONE"
411 gdb_test "bt" "#0 +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#1 +\[^\r\n\]*\\mmain\\M.*" "main bt"
414 # Try re-run if the new PIE displacement takes effect.
415 gdb_test "kill" "" "kill" {Kill the program being debugged\? \(y or n\) } "y"
416 reach $solib_bp "run" $displacement
419 test_core $file $displacement
421 test_attach $file $displacement
428 with_test_prefix "symbol-less" {
429 # Test also `exec-file'-command loaded $FILE - therefore
430 # without symbols. SYMBOL_OBJFILE is not available and only
431 # EXEC_BFD must be used.
435 # Clear it to never find any separate debug infos in $debug_root.
436 gdb_test_no_output "set debug-file-directory"
437 gdb_reinitialize_dir $srcdir/$subdir
439 # Print the "PIE (Position Independent Executable)
440 # displacement" message.
441 gdb_test_no_output "set verbose on"
443 # Test no (error) message has been printed by `exec-file'.
444 set escapedfile [string_to_regexp $file]
445 gdb_test "exec-file $file" "exec-file $escapedfile" "load"
448 reach $solib_bp run $displacement
450 # Use two separate gdb_test_multiple statements to avoid timeouts due
451 # to slow processing of wildcard capturing long output
452 set test "info files"
454 gdb_test_multiple $test $test {
455 -re "\r\n\[\t \]*Entry point:\[\t \]*0x(\[0-9a-f\]+)\r\n" {
456 set entrynohex $expect_out(1,string)
457 gdb_test_multiple "" $test {
458 -re "\r\n$gdb_prompt $" {
465 # `info sym' cannot be tested for .opd as the binary may not have
467 if {[istarget powerpc64-*] && [is_lp64_target]} {
468 set test "convert entry point"
469 gdb_test_multiple "p *(void(*)(void) *) 0x$entrynohex" $test {
470 -re " =( \\(\[^0-9\]*\\))? 0x(\[0-9a-f\]+)( < \[^\r\n\]*)?\r\n$gdb_prompt $" {
471 set entrynohex $expect_out(2,string)
476 if {$entrynohex != ""} {
477 gdb_test "break *0x$entrynohex" "" "break at entry point"
478 gdb_test "continue" "\r\nBreakpoint \[0-9\]+, 0x0*$entrynohex in .*" "entry point reached"
481 # There is no symbol to break at ld.so. Moreover it can
482 # exit with an error code.
484 set test "ld.so exit"
485 set test_displacement "seen displacement message as $displacement"
486 gdb_test_multiple "run" $test {
487 -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
488 # Missing "$gdb_prompt $" is intentional.
489 if {$expect_out(1,string) == "0x0"} {
494 if {$displacement == $case || $displacement == "PRESENT"} {
495 pass $test_displacement
496 set displacement "FOUND-$displacement"
498 fail $test_displacement
502 -re "$inferior_exited_re (normally|with code \[0-9\]+).\r\n$gdb_prompt $" {
503 # Do not check the binary filename as it may be truncated.
507 if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
508 fail $test_displacement
514 # Create separate binaries for each testcase - to make the possible reported
515 # problem reproducible after the whole test run finishes.
517 foreach ldprelink {NO YES} {
518 foreach ldsepdebug {NO IN SEP} {
519 # Skip running the ldsepdebug test if we do not have system separate
520 # debug info available.
521 if {$interp_system_debug == "" && $ldsepdebug == "SEP"} {
525 set ldname "LDprelink${ldprelink}debug${ldsepdebug}"
526 set interp $binprefix-$ldname
528 # prelink needs to always prelink all the dependencies to do any file
529 # modifications of its files. ld.so also needs all the dependencies to
530 # be prelinked to omit the relocation process. In-memory file offsets
531 # are not dependent whether ld.so went the prelink way or through the
532 # relocation process.
534 # For GDB we are not interested whether prelink succeeds as it is
535 # transparent to GDB. GDB is being tested for differences of file
536 # offsets vs. in-memory offsets. So we have to prelink even ld.so for
537 # the BIN modification to happen but we need to restore the original
538 # possibly unprelinked ld.so to test all the combinations for GDB.
539 set interp_saved ${interp}-saved
541 with_test_prefix "$ldname" {
542 if {$ldsepdebug == "NO"} {
543 file_copy $interp_system $interp
544 # Never call strip-debug before unprelink:
545 # prelink: ...: Section .note.gnu.build-id created after prelinking
546 if ![prelinkNO $interp] {
550 } elseif {$ldsepdebug == "IN" && $interp_system_debug == ""} {
551 file_copy $interp_system $interp
552 } elseif {$ldsepdebug == "IN" && $interp_system_debug != ""} {
553 file_copy $interp_system $interp
554 file_copy $interp_system_debug "${interp}.debug"
555 # eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
556 if {![prelinkNO $interp] || ![prelinkNO "${interp}.debug"]} {
559 set test "eu-unstrip unprelinked:[file tail $interp_system] + [file tail $interp_system_debug] to [file tail $interp]"
560 set command "exec eu-unstrip -o $interp $interp ${interp}.debug"
561 verbose -log "command is $command"
562 if [catch $command] {
569 } elseif {$ldsepdebug == "SEP" && $interp_system_debug == ""} {
570 file_copy $interp_system $interp
571 # eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
572 if ![prelinkNO $interp] {
575 gdb_gnu_strip_debug $interp
576 } elseif {$ldsepdebug == "SEP" && $interp_system_debug != ""} {
577 file_copy $interp_system $interp
578 file_copy $interp_system_debug "${interp}.debug"
581 if {$ldsepdebug == "SEP"} {
582 if ![prelinkNO "${interp}.debug"] {
586 file delete "${interp}.debug"
589 if ![prelink$ldprelink $interp] {
592 if {$ldprelink == "NO"} {
593 set displacement "NONZERO"
595 # x86* kernel loads prelinked PIE binary at its
596 # prelinked address but ppc* kernel loads it at a
597 # random address. prelink normally skips PIE binaries
598 # during the system scan.
599 set displacement "PRESENT"
601 test_ld $interp 0 [expr {$ldsepdebug == "NO"}] $displacement
603 if ![file_copy $interp $interp_saved] {
607 foreach binprelink {NO YES} {
608 foreach binsepdebug {NO IN SEP} {
609 # "ATTACH" is like "YES" but it is modified during
610 # run. It cannot be used for problem
611 # reproducibility after the testcase ends.
612 foreach binpie {NO YES ATTACH} {
613 # This combination is not possible, non-PIE (fixed address)
614 # binary cannot be prelinked to any (other) address.
615 if {$binprelink == "YES" && $binpie == "NO"} {
619 set binname "BINprelink${binprelink}debug${binsepdebug}pie${binpie}"
620 set exec $binprefix-$binname
622 with_test_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 {$binprelink == "NO"} {
644 set displacement "NONZERO"
646 # x86* kernel loads prelinked PIE binary at its prelinked
647 # address but ppc* kernel loads it at a random address.
648 # prelink normally skips PIE binaries during the system scan.
649 set displacement "PRESENT"
652 if {[prelink$binprelink $relink_args [file tail $exec]]
653 && [file_copy $interp_saved $interp]} {
654 if {$binpie != "ATTACH"} {
655 test_ld $exec 1 [expr {$binsepdebug == "NO"}] $displacement
657 # If the file has been randomly prelinked it must be
658 # "NONZERO". We could see "ZERO" only if it was unprelinked
659 # and it is now running at the same address - which is 0 but
660 # executable can never run at address 0.
662 set displacement "NONZERO"
663 test_attach $exec $displacement $relink_args
665 # ATTACH means that executables and libraries have been
666 # modified after they have been run. They cannot be reused
667 # for problem reproducibility after the testcase ends in
668 # the ATTACH case. Therefore they are rather deleted not
669 # to confuse after the run finishes.
670 set exec_debug [system_debug_get $exec]
671 if {$exec_debug != ""} {
672 # `file delete [glob "${exec_debug}*"]' does not work.
673 foreach f [glob "${exec_debug}*"] {
677 file delete -force $dir
678 # `file delete [glob "${exec}*"]' does not work.
679 foreach f [glob "${exec}*"] {
689 file delete $interp_saved