gdb/testsuite/gdb.base/break-interp.exp

   1 # Copyright 2010-2015 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.
  17 if { ![isnative] || [is_remote host] || [target_info exists use_gdb_stub]
  18      || ![istarget *-linux*] || [skip_shlib_tests]} {
  19     continue
  20 }
  21
  22 load_lib prelink-support.exp
  23
  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"
  32
  33 if [get_compiler_info] {
  34     return -1
  35 }
  36
  37 # Use -soname so that the new library gets copied by build_executable_own_libs.
  38
  39 if {[gdb_compile_shlib ${srcdir}/${subdir}/${srcfile_lib} ${binfile_lib} [list debug ldflags=-Wl,-soname,${test}.so]] != ""} {
  40     return -1
  41 }
  42
  43 if {[build_executable ${test}.exp $binfile_test ${srcfile_test} {}] == -1} {
  44     return -1
  45 }
  46
  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} {
  50     global debug_root
  51
  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]
  55
  56     # isfile returns 1 even for symlinks to files.
  57     set retval $debug_root/$exec_build_id_debug
  58     if [file isfile $retval] {
  59         return $retval
  60     }
  61     set retval $exec_dir/$debug_base
  62     if [file isfile $retval] {
  63         return $retval
  64     }
  65     set retval $exec_dir/.debug/$debug_base
  66     if [file isfile $retval] {
  67         return $retval
  68     }
  69     set retval $debug_root/$exec_dir/$debug_base
  70     if [file isfile $retval] {
  71         return $retval
  72     }
  73     return ""
  74 }
  75
  76 gdb_exit
  77 gdb_start
  78 set debug_root ""
  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)
  83     }
  84 }
  85
  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"
  89
  90 proc prelinkNO {arg {name ""}} {
  91     return [prelink_no $arg $name]
  92 }
  93
  94 proc prelinkYES {arg {name ""}} {
  95     return [prelink_yes $arg $name]
  96 }
  97
  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] {
 104         fail $test
 105         return 0
 106     } else {
 107         pass $test
 108         return 1
 109     }
 110 }
 111
 112 # The marker function for the standard runtime linker interface is
 113 # _dl_debug_state.  The probes-based interface has no specific marker
 114 # function; the probe we will stop on (init_start) is in dl_main so we
 115 # check for that.
 116
 117 set solib_bp {(_dl_debug_state|dl_main)}
 118
 119 # Implementation of reach.
 120
 121 proc reach_1 {func command displacement} {
 122     global gdb_prompt expect_out solib_bp
 123
 124     if {$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]} {
 129         return
 130     }
 131
 132     set test "reach"
 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"} {
 139                 set case "ZERO"
 140             } else {
 141                 set case "NONZERO"
 142             }
 143             if {$displacement == $case || $displacement == "PRESENT"} {
 144                 pass $test_displacement
 145                 set displacement "FOUND-$displacement"
 146             } else {
 147                 fail $test_displacement
 148             }
 149             exp_continue
 150         }
 151         -re "Breakpoint \[0-9\]+, \\.?(__GI_)?$func \\(.*\\) at .*:\[0-9\]+\r\n.*$gdb_prompt $" {
 152             if {$func == $solib_bp} {
 153                 fail $test
 154             } else {
 155                 pass $test
 156             }
 157         }
 158         -re "Breakpoint \[0-9\]+, \[0-9xa-f\]+ in \\.?(__GI_)?$func \\(\\).*\r\n$gdb_prompt $" {
 159             if {$func == $solib_bp} {
 160                 fail $test
 161             } else {
 162                 pass $test
 163             }
 164         }
 165         -re "Stopped due to (spurious )?shared library event.*\r\n$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"
 172                     exp_continue
 173                 } else {
 174                     pass $test
 175                 }
 176             } else {
 177                 fail $test
 178             }
 179         }
 180     }
 181     if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
 182         fail $test_displacement
 183     }
 184
 185     if {$func == $solib_bp} {
 186         gdb_test_no_output "set stop-on-solib-events 0"
 187     }
 188 }
 189
 190 # `runto' does not check we stopped really at the function we specified.
 191 # DISPLACEMENT can be "NONE" for no message to be present, "ZERO" for
 192 # displacement of 0 bytes to be present, "NONZERO" for displacement of non-0
 193 # bytes to be present and "PRESENT" if both "ZERO" and "NONZERO" are valid.
 194 proc reach {func command displacement} {
 195     with_test_prefix "reach-$func" {
 196         reach_1 $func $command $displacement
 197     }
 198 }
 199
 200 proc test_core {file displacement} {
 201     with_test_prefix "core" {
 202         global srcdir subdir gdb_prompt expect_out
 203
 204         set corefile [core_find $file {} "segv"]
 205         if {$corefile == ""} {
 206             return
 207         }
 208
 209         gdb_exit
 210         gdb_start
 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
 215         gdb_load $file
 216
 217         # Print the "PIE (Position Independent Executable) displacement" message.
 218         gdb_test_no_output "set verbose on"
 219
 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"} {
 226                     set case "ZERO"
 227                 } else {
 228                     set case "NONZERO"
 229                 }
 230                 if {$displacement == $case || $displacement == "PRESENT"} {
 231                     pass $test_displacement
 232                     set displacement "FOUND-$displacement"
 233                 } else {
 234                     fail $test_displacement
 235                 }
 236                 exp_continue
 237             }
 238             -re "Core was generated by .*\r\n#0 .*$gdb_prompt $" {
 239                 # Do not check the binary filename as it may be truncated.
 240                 pass $test
 241             }
 242         }
 243         if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
 244             fail $test_displacement
 245         }
 246
 247         gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "core main bt"
 248     }
 249 }
 250
 251 proc test_attach_gdb {file pid displacement prefix} {
 252     with_test_prefix "$prefix" {
 253         global gdb_prompt expect_out
 254
 255         gdb_exit
 256         gdb_start
 257
 258         # Print the "PIE (Position Independent Executable) displacement" message.
 259         gdb_test_no_output "set verbose on"
 260
 261         gdb_test "file $file" "Reading symbols from .*done\\." "file"
 262
 263         set test "attach"
 264         gdb_test_multiple "attach $pid" $test {
 265             -re "Attaching to (program: .*, )?process $pid\r\n" {
 266                 # Missing "$gdb_prompt $" is intentional.
 267                 pass $test
 268             }
 269         }
 270
 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"} {
 277                     set case "ZERO"
 278                 } else {
 279                     set case "NONZERO"
 280                 }
 281                 if {$displacement == $case || $displacement == "PRESENT"} {
 282                     pass $test_displacement
 283                     set displacement "FOUND-$displacement"
 284                 } else {
 285                     fail $test_displacement
 286                 }
 287                 exp_continue
 288             }
 289             -re "$gdb_prompt $" {
 290                 pass $test
 291             }
 292         }
 293         if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
 294             fail $test_displacement
 295         }
 296
 297         gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "attach main bt"
 298         gdb_exit
 299     }
 300 }
 301
 302 proc test_attach {file displacement {relink_args ""}} {
 303     global board_info
 304     global exec
 305
 306     gdb_exit
 307
 308     set test "sleep function started"
 309
 310     set command "${file} sleep"
 311     set res [remote_spawn host $command]
 312     if { $res < 0 || $res == "" } {
 313         perror "Spawning $command failed."
 314         fail $test
 315         return
 316     }
 317     set pid [exp_pid -i $res]
 318     gdb_expect {
 319         -re "sleeping\r\n" {
 320             pass $test
 321         }
 322         eof {
 323             fail "$test (eof)"
 324             return
 325         }
 326         timeout {
 327             fail "$test (timeout)"
 328             return
 329         }
 330     }
 331
 332     if {$relink_args == ""} {
 333         test_attach_gdb $exec $pid $displacement "attach"
 334     } else {
 335         # These could be rather passed as arguments.
 336         global interp_saved interp
 337
 338         foreach relink {YES NO} {
 339             # Formerly this test was testing only prelinking of $EXEC.  As the
 340             # prelink command automatically prelinks all of $EXEC's libraries,
 341             # even $INTERP got prelinked.  Therefore, we formerly had to
 342             # `[file_copy $interp_saved $interp]' to make $INTERP not affected
 343             # by this prelinking of $EXEC.
 344             #
 345             # But now we need to test even prelinking of $INTERP.  We could
 346             # create a separate test to test just the $INTERP prelinking.  For
 347             # test simplicity, we merged this test and the test above by not
 348             # restoring $INTERP after $EXEC prelink.  $INTERP gets restored
 349             # later below.
 350             #
 351             # `(wrong library or version mismatch?)' messages are printed for
 352             # $binfile_lib on platforms converting REL->RELA relocations by
 353             # prelink (such as on i386).  There is no reliable way to verify
 354             # the library file matches the running library in such case but
 355             # GDB at least attempts to set the right displacement.  We test
 356             # `libfunc' is present in the backtrace and therefore the
 357             # displacement has been guessed right.
 358
 359             if [prelink$relink $relink_args [file tail $exec]] {
 360                 # /proc/PID/exe cannot be loaded as it is "EXECNAME (deleted)".
 361                 test_attach_gdb $exec $pid $displacement "attach-relink$relink"
 362             }
 363         }
 364         file_copy $interp_saved $interp
 365     }
 366
 367     remote_exec host "kill -9 $pid"
 368 }
 369
 370 proc test_ld {file ifmain trynosym displacement} {
 371     global srcdir subdir gdb_prompt expect_out inferior_exited_re solib_bp
 372
 373     # First test normal `file'-command loaded $FILE with symbols.
 374
 375     gdb_exit
 376     gdb_start
 377     # Clear it to never find any separate debug infos in $debug_root.
 378     gdb_test_no_output "set debug-file-directory"
 379     gdb_reinitialize_dir $srcdir/$subdir
 380     gdb_load $file
 381
 382     # Print the "PIE (Position Independent Executable) displacement" message.
 383     gdb_test_no_output "set verbose on"
 384
 385     # We want to test the re-run of a PIE in the case where the executable
 386     # is loaded with a different displacement, but disable-randomization
 387     # prevents that from happening.  So turn it off.
 388     gdb_test "set disable-randomization off"
 389
 390     if $ifmain {
 391         gdb_test_no_output "set args segv"
 392     } else {
 393         global binfile_test
 394
 395         # ld.so needs some executable to run to reach _dl_debug_state.
 396         gdb_test_no_output "set args [standard_output_file $binfile_test]" \
 397             "set args OBJDIR/${subdir}/$binfile_test"
 398     }
 399
 400     reach $solib_bp "run" $displacement
 401
 402     gdb_test "bt" "#0 +\[^\r\n\]*\\m(__GI_)?$solib_bp\\M.*" "dl bt"
 403
 404     if $ifmain {
 405         reach "main" continue "NONE"
 406
 407         reach "libfunc" continue "NONE"
 408
 409         gdb_test "bt" "#0 +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#1 +\[^\r\n\]*\\mmain\\M.*" "main bt"
 410     }
 411
 412     # Try re-run if the new PIE displacement takes effect.
 413     gdb_test "kill" "" "kill" {Kill the program being debugged\? \(y or n\) } "y"
 414     reach $solib_bp "run" $displacement
 415
 416     if $ifmain {
 417         test_core $file $displacement
 418
 419         test_attach $file $displacement
 420     }
 421
 422     if !$trynosym {
 423         return
 424     }
 425
 426     with_test_prefix "symbol-less" {
 427         # Test also `exec-file'-command loaded $FILE - therefore
 428         # without symbols.  SYMBOL_OBJFILE is not available and only
 429         # EXEC_BFD must be used.
 430
 431         gdb_exit
 432         gdb_start
 433         # Clear it to never find any separate debug infos in $debug_root.
 434         gdb_test_no_output "set debug-file-directory"
 435         gdb_reinitialize_dir $srcdir/$subdir
 436
 437         # Print the "PIE (Position Independent Executable)
 438         # displacement" message.
 439         gdb_test_no_output "set verbose on"
 440
 441         # Test no (error) message has been printed by `exec-file'.
 442         set escapedfile [string_to_regexp $file]
 443         gdb_test "exec-file $file" "exec-file $escapedfile" "load"
 444
 445         if $ifmain {
 446             reach $solib_bp run $displacement
 447
 448             # Use two separate gdb_test_multiple statements to avoid timeouts due
 449             # to slow processing of wildcard capturing long output
 450             set test "info files"
 451             set entrynohex ""
 452             gdb_test_multiple $test $test {
 453                 -re "\r\n\[\t \]*Entry point:\[\t \]*0x(\[0-9a-f\]+)\r\n" {
 454                     set entrynohex $expect_out(1,string)
 455                     gdb_test_multiple "" $test {
 456                         -re "\r\n$gdb_prompt $" {
 457                             pass $test
 458                         }
 459                     }
 460                 }
 461             }
 462
 463             # `info sym' cannot be tested for .opd as the binary may not have
 464             # symbols.
 465             if {[istarget powerpc64-*] && [is_lp64_target]} {
 466                 set test "convert entry point"
 467                 gdb_test_multiple "p *(void(*)(void) *) 0x$entrynohex" $test {
 468                     -re " =( \\(\[^0-9\]*\\))? 0x(\[0-9a-f\]+)( < \[^\r\n\]*)?\r\n$gdb_prompt $" {
 469                         set entrynohex $expect_out(2,string)
 470                         pass $test
 471                     }
 472                 }
 473             }
 474             if {$entrynohex != ""} {
 475                 gdb_test "break *0x$entrynohex" "" "break at entry point"
 476                 gdb_test "continue" "\r\nBreakpoint \[0-9\]+, 0x0*$entrynohex in .*" "entry point reached"
 477             }
 478         } else {
 479             # There is no symbol to break at ld.so.  Moreover it can
 480             # exit with an error code.
 481
 482             set test "ld.so exit"
 483             set test_displacement "seen displacement message as $displacement"
 484             gdb_test_multiple "run" $test {
 485                 -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {
 486                     # Missing "$gdb_prompt $" is intentional.
 487                     if {$expect_out(1,string) == "0x0"} {
 488                         set case "ZERO"
 489                     } else {
 490                         set case "NONZERO"
 491                     }
 492                     if {$displacement == $case || $displacement == "PRESENT"} {
 493                         pass $test_displacement
 494                         set displacement "FOUND-$displacement"
 495                     } else {
 496                         fail $test_displacement
 497                     }
 498                     exp_continue
 499                 }
 500                 -re "$inferior_exited_re (normally|with code \[0-9\]+).\r\n$gdb_prompt $" {
 501                     # Do not check the binary filename as it may be truncated.
 502                     pass $test
 503                 }
 504             }
 505             if ![regexp {^(NONE|FOUND-.*)$} $displacement] {
 506                 fail $test_displacement
 507             }
 508         }
 509     }
 510 }
 511
 512 # Create separate binaries for each testcase - to make the possible reported
 513 # problem reproducible after the whole test run finishes.
 514
 515 foreach ldprelink {NO YES} {
 516     foreach ldsepdebug {NO IN SEP} {
 517         # Skip running the ldsepdebug test if we do not have system separate
 518         # debug info available.
 519         if {$interp_system_debug == "" && $ldsepdebug == "SEP"} {
 520             continue
 521         }
 522
 523         set ldname "LDprelink${ldprelink}debug${ldsepdebug}"
 524         set interp $binprefix-$ldname
 525
 526         # prelink needs to always prelink all the dependencies to do any file
 527         # modifications of its files.  ld.so also needs all the dependencies to
 528         # be prelinked to omit the relocation process.  In-memory file offsets
 529         # are not dependent whether ld.so went the prelink way or through the
 530         # relocation process.
 531         #
 532         # For GDB we are not interested whether prelink succeeds as it is
 533         # transparent to GDB.  GDB is being tested for differences of file
 534         # offsets vs. in-memory offsets.  So we have to prelink even ld.so for
 535         # the BIN modification to happen but we need to restore the original
 536         # possibly unprelinked ld.so to test all the combinations for GDB.
 537         set interp_saved ${interp}-saved
 538
 539         with_test_prefix "$ldname" {
 540             if {$ldsepdebug == "NO"} {
 541                 file_copy $interp_system $interp
 542                 # Never call strip-debug before unprelink:
 543                 # prelink: ...: Section .note.gnu.build-id created after prelinking
 544                 if ![prelinkNO $interp] {
 545                     continue
 546                 }
 547                 strip_debug $interp
 548             } elseif {$ldsepdebug == "IN" && $interp_system_debug == ""} {
 549                 file_copy $interp_system $interp
 550             } elseif {$ldsepdebug == "IN" && $interp_system_debug != ""} {
 551                 file_copy $interp_system $interp
 552                 file_copy $interp_system_debug "${interp}.debug"
 553                 # eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
 554                 if {![prelinkNO $interp] || ![prelinkNO "${interp}.debug"]} {
 555                     continue
 556                 }
 557                 set test "eu-unstrip unprelinked:[file tail $interp_system] + [file tail $interp_system_debug] to [file tail $interp]"
 558                 set command "exec eu-unstrip -o $interp $interp ${interp}.debug"
 559                 verbose -log "command is $command"
 560                 if [catch $command] {
 561                     setup_xfail *-*-*
 562                     fail $test
 563                     continue
 564                 } else {
 565                     pass $test
 566                 }
 567             } elseif {$ldsepdebug == "SEP" && $interp_system_debug == ""} {
 568                 file_copy $interp_system $interp
 569                 # eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
 570                 if ![prelinkNO $interp] {
 571                     continue
 572                 }
 573                 gdb_gnu_strip_debug $interp
 574             } elseif {$ldsepdebug == "SEP" && $interp_system_debug != ""} {
 575                 file_copy $interp_system $interp
 576                 file_copy $interp_system_debug "${interp}.debug"
 577             }
 578
 579             if {$ldsepdebug == "SEP"} {
 580                 if ![prelinkNO "${interp}.debug"] {
 581                     continue
 582                 }
 583             } else {
 584                 file delete "${interp}.debug"
 585             }
 586
 587             if ![prelink$ldprelink $interp] {
 588                 continue
 589             }
 590             if {$ldprelink == "NO"} {
 591                 set displacement "NONZERO"
 592             } else {
 593                 # x86* kernel loads prelinked PIE binary at its
 594                 # prelinked address but ppc* kernel loads it at a
 595                 # random address.  prelink normally skips PIE binaries
 596                 # during the system scan.
 597                 set displacement "PRESENT"
 598             }
 599             test_ld $interp 0 [expr {$ldsepdebug == "NO"}] $displacement
 600
 601             if ![file_copy $interp $interp_saved] {
 602                 continue
 603             }
 604
 605             foreach binprelink {NO YES} {
 606                 foreach binsepdebug {NO IN SEP} {
 607                     # "ATTACH" is like "YES" but it is modified during
 608                     # run.  It cannot be used for problem
 609                     # reproducibility after the testcase ends.
 610                     foreach binpie {NO YES ATTACH} {
 611                         # This combination is not possible, non-PIE (fixed address)
 612                         # binary cannot be prelinked to any (other) address.
 613                         if {$binprelink == "YES" && $binpie == "NO"} {
 614                             continue
 615                         }
 616
 617                         set binname "BINprelink${binprelink}debug${binsepdebug}pie${binpie}"
 618                         set exec $binprefix-$binname
 619
 620                         with_test_prefix "$binname" {
 621                             set opts "ldflags=-Wl,$binfile_lib,-rpath,[file dirname $binfile_lib]"
 622                             if {$binsepdebug != "NO"} {
 623                                 lappend opts {debug}
 624                             }
 625                             if {$binpie != "NO"} {
 626                                 lappend opts {additional_flags=-fPIE -pie}
 627                             }
 628
 629                             set dir ${exec}.d
 630                             set relink_args [build_executable_own_libs ${test}.exp [file tail $exec] $srcfile $opts $interp $dir]
 631                             if {$relink_args == ""} {
 632                                 continue
 633                             }
 634
 635                             if {$binsepdebug == "SEP"} {
 636                                 gdb_gnu_strip_debug $exec
 637                             }
 638
 639                             if {$binpie == "NO"} {
 640                                 set displacement "NONE"
 641                             } elseif {$binprelink == "NO"} {
 642                                 set displacement "NONZERO"
 643                             } else {
 644                                 # x86* kernel loads prelinked PIE binary at its prelinked
 645                                 # address but ppc* kernel loads it at a random address.
 646                                 # prelink normally skips PIE binaries during the system scan.
 647                                 set displacement "PRESENT"
 648                             }
 649
 650                             if {[prelink$binprelink $relink_args [file tail $exec]]
 651                                 && [file_copy $interp_saved $interp]} {
 652                                 if {$binpie != "ATTACH"} {
 653                                     test_ld $exec 1 [expr {$binsepdebug == "NO"}] $displacement
 654                                 } else {
 655                                     # If the file has been randomly prelinked it must be
 656                                     # "NONZERO".  We could see "ZERO" only if it was unprelinked
 657                                     # and it is now running at the same address - which is 0 but
 658                                     # executable can never run at address 0.
 659
 660                                     set displacement "NONZERO"
 661                                     test_attach $exec $displacement $relink_args
 662
 663                                     # ATTACH means that executables and libraries have been
 664                                     # modified after they have been run.  They cannot be reused
 665                                     # for problem reproducibility after the testcase ends in
 666                                     # the ATTACH case.  Therefore they are rather deleted not
 667                                     # to confuse after the run finishes.
 668                                     set exec_debug [system_debug_get $exec]
 669                                     if {$exec_debug != ""} {
 670                                         # `file delete [glob "${exec_debug}*"]' does not work.
 671                                         foreach f [glob "${exec_debug}*"] {
 672                                             file delete $f
 673                                         }
 674                                     }
 675                                     file delete -force $dir
 676                                     # `file delete [glob "${exec}*"]' does not work.
 677                                     foreach f [glob "${exec}*"] {
 678                                         file delete $f
 679                                     }
 680                                 }
 681                             }
 682                         }
 683                     }
 684                 }
 685             }
 686
 687             file delete $interp_saved
 688         }
 689     }
 690 }