1# Copyright 2010, 2011 Free Software Foundation, Inc. 2 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. 7# 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. 12# 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/>. 15 16# This test only works on GNU/Linux. 17if { ![isnative] || [is_remote host] || ![istarget *-linux*] || [skip_shlib_tests]} { 18 continue 19} 20 21load_lib prelink-support.exp 22 23set test "break-interp" 24set binprefix ${objdir}/${subdir}/${test} 25# Only to get the $interp_system name. 26set srcfile_test "start.c" 27set binfile_test ${test}-test 28set binfile_lib ${objdir}/${subdir}/${test}.so 29set srcfile "${test}-main.c" 30set srcfile_lib "${test}-lib.c" 31 32if [get_compiler_info ${binfile_lib}] { 33 return -1 34} 35 36# Use -soname so that the new library gets copied by build_executable_own_libs. 37 38if {[gdb_compile_shlib ${srcdir}/${subdir}/${srcfile_lib} ${binfile_lib} [list debug ldflags=-Wl,-soname,${test}.so]] != ""} { 39 return -1 40} 41 42if {[build_executable ${test}.exp $binfile_test ${srcfile_test} {}] == -1} { 43 return -1 44} 45 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. 48proc system_debug_get {exec} { 49 global debug_root 50 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] 54 55 # isfile returns 1 even for symlinks to files. 56 set retval $debug_root/$exec_build_id_debug 57 if [file isfile $retval] { 58 return $retval 59 } 60 set retval $exec_dir/$debug_base 61 if [file isfile $retval] { 62 return $retval 63 } 64 set retval $exec_dir/.debug/$debug_base 65 if [file isfile $retval] { 66 return $retval 67 } 68 set retval $debug_root/$exec_dir/$debug_base 69 if [file isfile $retval] { 70 return $retval 71 } 72 return "" 73} 74 75gdb_exit 76gdb_start 77set debug_root "" 78set test "show debug-file-directory" 79gdb_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) 82 } 83} 84 85set interp_system [section_get ${objdir}/${subdir}/$binfile_test .interp] 86set interp_system_debug [system_debug_get $interp_system] 87verbose -log "$interp_system has debug $interp_system_debug" 88 89proc prelinkNO {arg {name ""}} { 90 return [prelink_no $arg $name] 91} 92 93proc prelinkYES {arg {name ""}} { 94 return [prelink_yes $arg $name] 95} 96 97proc 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] { 103 fail $test 104 return 0 105 } else { 106 pass $test 107 return 1 108 } 109} 110 111# Implementation of reach. 112 113proc reach_1 {func command displacement} { 114 global gdb_prompt expect_out 115 116 if {$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]} { 121 return 122 } 123 124 set test "reach" 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"} { 131 set case "ZERO" 132 } else { 133 set case "NONZERO" 134 } 135 if {$displacement == $case || $displacement == "PRESENT"} { 136 pass $test_displacement 137 set displacement "FOUND-$displacement" 138 } else { 139 fail $test_displacement 140 } 141 exp_continue 142 } 143 -re "Breakpoint \[0-9\]+, \\.?(__GI_)?$func \\(.*\\) at .*:\[0-9\]+\r\n.*$gdb_prompt $" { 144 if {$func == "_dl_debug_state"} { 145 fail $test 146 } else { 147 pass $test 148 } 149 } 150 -re "Breakpoint \[0-9\]+, \[0-9xa-f\]+ in \\.?(__GI_)?$func \\(\\).*\r\n$gdb_prompt $" { 151 if {$func == "_dl_debug_state"} { 152 fail $test 153 } else { 154 pass $test 155 } 156 } 157 -re "Stopped due to shared library event\r\n$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" 164 exp_continue 165 } else { 166 pass $test 167 } 168 } else { 169 fail $test 170 } 171 } 172 } 173 if ![regexp {^(NONE|FOUND-.*)$} $displacement] { 174 fail $test_displacement 175 } 176 177 if {$func == "_dl_debug_state"} { 178 gdb_test_no_output "set stop-on-solib-events 0" 179 } 180} 181 182# `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. 186proc reach {func command displacement} { 187 global pf_prefix 188 set old_ldprefix $pf_prefix 189 lappend pf_prefix "reach-$func:" 190 191 reach_1 $func $command $displacement 192 193 set pf_prefix $old_ldprefix 194} 195 196proc test_core {file displacement} { 197 global srcdir subdir gdb_prompt expect_out 198 199 set corefile [core_find $file {} "segv"] 200 if {$corefile == ""} { 201 return 202 } 203 204 global pf_prefix 205 set old_ldprefix $pf_prefix 206 lappend pf_prefix "core:" 207 208 gdb_exit 209 gdb_start 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 214 gdb_load $file 215 216 # Print the "PIE (Position Independent Executable) displacement" message. 217 gdb_test_no_output "set verbose on" 218 219 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"} { 225 set case "ZERO" 226 } else { 227 set case "NONZERO" 228 } 229 if {$displacement == $case || $displacement == "PRESENT"} { 230 pass $test_displacement 231 set displacement "FOUND-$displacement" 232 } else { 233 fail $test_displacement 234 } 235 exp_continue 236 } 237 -re "Core was generated by .*\r\n#0 .*$gdb_prompt $" { 238 # Do not check the binary filename as it may be truncated. 239 pass $test 240 } 241 } 242 if ![regexp {^(NONE|FOUND-.*)$} $displacement] { 243 fail $test_displacement 244 } 245 246 gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "core main bt" 247 248 set pf_prefix $old_ldprefix 249} 250 251proc test_attach_gdb {file pid displacement prefix} { 252 global gdb_prompt expect_out 253 254 global pf_prefix 255 set old_ldprefix $pf_prefix 256 lappend pf_prefix "$prefix:" 257 258 gdb_exit 259 gdb_start 260 261 # Print the "PIE (Position Independent Executable) displacement" message. 262 gdb_test_no_output "set verbose on" 263 264 if {$file != ""} { 265 gdb_test "file $file" "Reading symbols from .*done\\." "file" 266 } 267 268 set test "attach" 269 gdb_test_multiple "attach $pid" $test { 270 -re "Attaching to (program: .*, )?process $pid\r\n" { 271 # Missing "$gdb_prompt $" is intentional. 272 pass $test 273 } 274 } 275 276 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"} { 282 set case "ZERO" 283 } else { 284 set case "NONZERO" 285 } 286 if {$displacement == $case || $displacement == "PRESENT"} { 287 pass $test_displacement 288 set displacement "FOUND-$displacement" 289 } else { 290 fail $test_displacement 291 } 292 exp_continue 293 } 294 -re "$gdb_prompt $" { 295 pass $test 296 } 297 } 298 if ![regexp {^(NONE|FOUND-.*)$} $displacement] { 299 fail $test_displacement 300 } 301 302 gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "attach main bt" 303 gdb_exit 304 305 set pf_prefix $old_ldprefix 306} 307 308proc test_attach {file displacement {relink_args ""}} { 309 global board_info 310 311 gdb_exit 312 313 set test "sleep function started" 314 315 set command "${file} sleep" 316 set res [remote_spawn host $command]; 317 if { $res < 0 || $res == "" } { 318 perror "Spawning $command failed." 319 fail $test 320 return 321 } 322 set pid [exp_pid -i $res] 323 gdb_expect { 324 -re "sleeping\r\n" { 325 pass $test 326 } 327 eof { 328 fail "$test (eof)" 329 return 330 } 331 timeout { 332 fail "$test (timeout)" 333 return 334 } 335 } 336 337 if {$relink_args == ""} { 338 test_attach_gdb "" $pid $displacement "attach" 339 } else { 340 # These could be rather passed as arguments. 341 global exec interp_saved interp 342 343 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. 349 # 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. $INTERP gets restored 354 # later below. 355 356 if [prelink$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" 359 } 360 } 361 file_copy $interp_saved $interp 362 } 363 364 remote_exec host "kill -9 $pid" 365} 366 367proc test_ld {file ifmain trynosym displacement} { 368 global srcdir subdir gdb_prompt expect_out inferior_exited_re 369 370 # First test normal `file'-command loaded $FILE with symbols. 371 372 gdb_exit 373 gdb_start 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 377 gdb_load $file 378 379 # Print the "PIE (Position Independent Executable) displacement" message. 380 gdb_test_no_output "set verbose on" 381 382 # 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" 386 387 if $ifmain { 388 gdb_test_no_output "set args segv" 389 } else { 390 global objdir binfile_test 391 392 # ld.so needs some executable to run to reach _dl_debug_state. 393 gdb_test_no_output "set args ${objdir}/${subdir}/$binfile_test" "set args OBJDIR/${subdir}/$binfile_test" 394 } 395 396 reach "_dl_debug_state" "run" $displacement 397 398 gdb_test "bt" "#0 +\[^\r\n\]*\\m(__GI_)?_dl_debug_state\\M.*" "dl bt" 399 400 if $ifmain { 401 reach "main" continue "NONE" 402 403 reach "libfunc" continue "NONE" 404 405 gdb_test "bt" "#0 +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#1 +\[^\r\n\]*\\mmain\\M.*" "main bt" 406 } 407 408 # 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 411 412 if $ifmain { 413 test_core $file $displacement 414 415 test_attach $file $displacement 416 } 417 418 if !$trynosym { 419 return 420 } 421 422 global pf_prefix 423 set old_ldprefix $pf_prefix 424 lappend pf_prefix "symbol-less:" 425 426 # Test also `exec-file'-command loaded $FILE - therefore without symbols. 427 # SYMBOL_OBJFILE is not available and only EXEC_BFD must be used. 428 429 gdb_exit 430 gdb_start 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 434 435 # Print the "PIE (Position Independent Executable) displacement" message. 436 gdb_test_no_output "set verbose on" 437 438 # 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" 441 442 if $ifmain { 443 reach "_dl_debug_state" run $displacement 444 445 # 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" 448 set entrynohex "" 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 $" { 454 pass $test 455 } 456 } 457 } 458 } 459 460 # `info sym' cannot be tested for .opd as the binary may not have 461 # symbols. 462 if {[istarget powerpc64-*] && [is_lp64_target]} { 463 set test "convert entry point" 464 gdb_test_multiple "p *(void(*)(void) *) 0x$entrynohex" $test { 465 -re " =( \\(\[^0-9\]*\\))? 0x(\[0-9a-f\]+)( < \[^\r\n\]*)?\r\n$gdb_prompt $" { 466 set entrynohex $expect_out(2,string) 467 pass $test 468 } 469 } 470 } 471 if {$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" 474 } 475 } else { 476 # There is no symbol to break at ld.so. Moreover it can exit with an 477 # error code. 478 479 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"} { 485 set case "ZERO" 486 } else { 487 set case "NONZERO" 488 } 489 if {$displacement == $case || $displacement == "PRESENT"} { 490 pass $test_displacement 491 set displacement "FOUND-$displacement" 492 } else { 493 fail $test_displacement 494 } 495 exp_continue 496 } 497 -re "$inferior_exited_re (normally|with code \[0-9\]+).\r\n$gdb_prompt $" { 498 # Do not check the binary filename as it may be truncated. 499 pass $test 500 } 501 } 502 if ![regexp {^(NONE|FOUND-.*)$} $displacement] { 503 fail $test_displacement 504 } 505 } 506 507 set pf_prefix $old_ldprefix 508} 509 510# Create separate binaries for each testcase - to make the possible reported 511# problem reproducible after the whole test run finishes. 512 513set old_ldprefix $pf_prefix 514foreach ldprelink {NO YES} { 515 foreach ldsepdebug {NO IN SEP} { 516 # Skip running the ldsepdebug test if we do not have system separate 517 # debug info available. 518 if {$interp_system_debug == "" && $ldsepdebug == "SEP"} { 519 continue 520 } 521 522 set ldname "LDprelink${ldprelink}debug${ldsepdebug}" 523 set interp $binprefix-$ldname 524 525 # 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. 530 # 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 537 538 set pf_prefix $old_ldprefix 539 lappend pf_prefix "$ldname:" 540 541 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] { 546 continue 547 } 548 strip_debug $interp 549 } elseif {$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"]} { 556 continue 557 } 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] { 562 setup_xfail *-*-* 563 fail $test 564 continue 565 } else { 566 pass $test 567 } 568 } elseif {$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] { 572 continue 573 } 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" 578 } 579 580 if {$ldsepdebug == "SEP"} { 581 if ![prelinkNO "${interp}.debug"] { 582 continue 583 } 584 } else { 585 file delete "${interp}.debug" 586 } 587 588 if ![prelink$ldprelink $interp] { 589 continue 590 } 591 if {$ldprelink == "NO"} { 592 set displacement "NONZERO" 593 } else { 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" 598 } 599 test_ld $interp 0 [expr {$ldsepdebug == "NO"}] $displacement 600 601 if ![file_copy $interp $interp_saved] { 602 continue 603 } 604 set old_binprefix $pf_prefix 605 foreach binprelink {NO YES} { 606 foreach binsepdebug {NO IN SEP} { 607 # "ATTACH" is like "YES" but it is modified during run. 608 # It cannot be used for problem reproducibility after the 609 # testcase ends. 610 foreach binpie {NO YES ATTACH} { 611 # This combination is not possible, non-PIE (fixed address) 612 # binary cannot be prelinked to any (other) address. 613 if {$binprelink == "YES" && $binpie == "NO"} { 614 continue 615 } 616 617 set binname "BINprelink${binprelink}debug${binsepdebug}pie${binpie}" 618 set exec $binprefix-$binname 619 620 set pf_prefix $old_binprefix 621 lappend pf_prefix "$binname:" 622 623 set opts "ldflags=-Wl,$binfile_lib,-rpath,[file dirname $binfile_lib]" 624 if {$binsepdebug != "NO"} { 625 lappend opts {debug} 626 } 627 if {$binpie != "NO"} { 628 lappend opts {additional_flags=-fPIE -pie} 629 } 630 631 set dir ${exec}.d 632 set relink_args [build_executable_own_libs ${test}.exp [file tail $exec] $srcfile $opts $interp $dir] 633 if {$relink_args == ""} { 634 continue; 635 } 636 637 if {$binsepdebug == "SEP"} { 638 gdb_gnu_strip_debug $exec 639 } 640 641 if {$binpie == "NO"} { 642 set displacement "NONE" 643 } elseif {$binprelink == "NO"} { 644 set displacement "NONZERO" 645 } else { 646 # x86* kernel loads prelinked PIE binary at its 647 # prelinked address but ppc* kernel loads it at 648 # a random address. prelink normally skips PIE 649 # binaries during the system scan. 650 set displacement "PRESENT" 651 } 652 653 if {[prelink$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 657 } else { 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 662 # at address 0. 663 664 set displacement "NONZERO" 665 test_attach $exec $displacement $relink_args 666 667 # 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 672 # run finishes. 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}*"] { 677 file delete $f 678 } 679 } 680 file delete -force $dir 681 # `file delete [glob "${exec}*"]' does not work. 682 foreach f [glob "${exec}*"] { 683 file delete $f 684 } 685 } 686 } 687 } 688 } 689 } 690 691 file delete $interp_saved 692 } 693} 694set pf_prefix $old_ldprefix 695