gdb/testsuite/gdb.base/attach.exp

   1 # Copyright 1997-2018 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 if {![can_spawn_for_attach]} {
  17     return 0
  18 }
  19
  20 standard_testfile attach.c attach2.c
  21 set binfile2 ${binfile}2
  22 set escapedbinfile  [string_to_regexp $binfile]
  23
  24 #execute_anywhere "rm -f ${binfile} ${binfile2}"
  25 remote_exec build "rm -f ${binfile} ${binfile2}"
  26 # For debugging this test
  27 #
  28 #log_user 1
  29
  30 # build the first test case
  31 #
  32 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  33     untested "failed to compile"
  34     return -1
  35 }
  36
  37 # Build the in-system-call test
  38
  39 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable {debug}] != "" } {
  40     untested "failed to compile in-system-call test"
  41     return -1
  42 }
  43
  44 if [get_compiler_info] {
  45     return -1
  46 }
  47
  48 proc do_attach_tests {} {
  49     global gdb_prompt
  50     global binfile
  51     global escapedbinfile
  52     global srcfile
  53     global testfile
  54     global subdir
  55     global timeout
  56     global decimal
  57
  58     # Figure out a regular expression that will match the sysroot,
  59     # noting that the default sysroot is "target:", and also noting
  60     # that GDB will strip "target:" from the start of filenames when
  61     # operating on the local filesystem.  However the default sysroot
  62     # can be set via configure option --with-sysroot, which can be "/".
  63     # If $binfile is a absolute path, so pattern
  64     # "$sysroot$escapedbinfile" below is wrong.  Use [^\r\n]* to make
  65     # $sysroot simple.
  66     set sysroot "\[^\r\n\]*"
  67
  68     # Start the program running and then wait for a bit, to be sure
  69     # that it can be attached to.
  70
  71     set test_spawn_id [spawn_wait_for_attach $binfile]
  72     set testpid [spawn_id_get_pid $test_spawn_id]
  73
  74     # Verify that we cannot attach to nonsense.
  75
  76     set test "attach to nonsense is prohibited"
  77     gdb_test_multiple "attach abc" "$test" {
  78         -re "Illegal process-id: abc\\.\r\n$gdb_prompt $" {
  79             pass "$test"
  80         }
  81         -re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
  82             # Response expected from /proc-based systems.
  83             pass "$test"
  84         }
  85         -re "Can't attach to process..*$gdb_prompt $" {
  86             # Response expected on Cygwin
  87             pass "$test"
  88         }
  89         -re "Attaching to.*$gdb_prompt $" {
  90             fail "$test (bogus pid allowed)"
  91         }
  92     }
  93
  94     # Verify that we cannot attach to nonsense even if its initial part is
  95     # a valid PID.
  96
  97     set test "attach to digits-starting nonsense is prohibited"
  98     gdb_test_multiple "attach ${testpid}x" "$test" {
  99         -re "Illegal process-id: ${testpid}x\\.\r\n$gdb_prompt $" {
 100             pass "$test"
 101         }
 102         -re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
 103             # Response expected from /proc-based systems.
 104             pass "$test"
 105         }
 106         -re "Can't attach to process..*$gdb_prompt $" {
 107             # Response expected on Cygwin
 108             pass "$test"
 109         }
 110         -re "Attaching to.*$gdb_prompt $" {
 111             fail "$test (bogus pid allowed)"
 112         }
 113     }
 114
 115     # Verify that we cannot attach to what appears to be a valid
 116     # process ID, but is a process that doesn't exist.  Traditionally,
 117     # most systems didn't have a process with ID 0, so we take that as
 118     # the default.  However, there are a few exceptions.
 119
 120     set boguspid 0
 121     if { [istarget "*-*-*bsd*"] } {
 122         # In FreeBSD 5.0, PID 0 is used for "swapper".  Use -1 instead
 123         # (which should have the desired effect on any version of
 124         # FreeBSD, and probably other *BSD's too).
 125         set boguspid -1
 126     }
 127     set test "attach to nonexistent process is prohibited"
 128     gdb_test_multiple "attach $boguspid" "$test" {
 129         -re "Attaching to.*, process $boguspid.*No such process.*$gdb_prompt $" {
 130             # Response expected on ptrace-based systems (i.e. HP-UX 10.20).
 131             pass "$test"
 132         }
 133         -re "Attaching to.*, process $boguspid failed.*Hint.*$gdb_prompt $" {
 134             # Response expected on ttrace-based systems (i.e. HP-UX 11.0).
 135             pass "$test"
 136         }
 137         -re "Attaching to.*, process $boguspid.*denied.*$gdb_prompt $" {
 138             pass "$test"
 139         }
 140         -re "Attaching to.*, process $boguspid.*not permitted.*$gdb_prompt $" {
 141             pass "$test"
 142         }
 143         -re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
 144             # Response expected from /proc-based systems.
 145             pass "$test"
 146         }
 147         -re "Can't attach to process..*$gdb_prompt $" {
 148             # Response expected on Cygwin
 149             pass "$test"
 150         }
 151         -re "Attaching to.*, process $boguspid.*failed.*$gdb_prompt $" {
 152             # Response expected on the extended-remote target.
 153             pass "$test"
 154         }
 155     }
 156
 157     # Verify that we can attach to the process by first giving its
 158     # executable name via the file command, and using attach with the
 159     # process ID.
 160
 161     # (Actually, the test system appears to do this automatically for
 162     # us.  So, we must also be prepared to be asked if we want to
 163     # discard an existing set of symbols.)
 164
 165     set test "set file, before attach1"
 166     gdb_test_multiple "file $binfile" "$test" {
 167         -re "Load new symbol table from.*y or n. $" {
 168             gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*done." \
 169                 "$test (re-read)"
 170         }
 171         -re "Reading symbols from $escapedbinfile\.\.\.*done.*$gdb_prompt $" {
 172             pass "$test"
 173         }
 174     }
 175
 176     set test "attach1, after setting file"
 177     gdb_test_multiple "attach $testpid" "$test" {
 178         -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*main.*at .*$srcfile:.*$gdb_prompt $" {
 179             pass "$test"
 180         }
 181         -re "Attaching to program.*`?$escapedbinfile\.exe'?, process $testpid.*\[Switching to thread $testpid\..*\].*$gdb_prompt $" {
 182             # Response expected on Cygwin
 183             pass "$test"
 184         }
 185     }
 186
 187     # Verify that we can "see" the variable "should_exit" in the
 188     # program, and that it is zero.
 189
 190     gdb_test "print should_exit" " = 0" "after attach1, print should_exit"
 191
 192     # Detach the process.
 193
 194     gdb_test "detach" \
 195         "Detaching from program: .*$escapedbinfile, process $testpid\r\n\\\[Inferior $decimal \\(.*\\) detached\\\]" \
 196         "attach1 detach"
 197
 198     # Wait a bit for gdb to finish detaching
 199
 200     exec sleep 5
 201
 202     # Purge the symbols from gdb's brain.  (We want to be certain the
 203     # next attach, which won't be preceded by a "file" command, is
 204     # really getting the executable file without our help.)
 205
 206     set old_timeout $timeout
 207     set timeout 15
 208     set test "attach1, purging symbols after detach"
 209     gdb_test_multiple "file" "$test" {
 210         -re "No executable file now.*Discard symbol table.*y or n. $" {
 211             gdb_test "y" "No symbol file now." "$test"
 212         }
 213     }
 214     set timeout $old_timeout
 215
 216     # Verify that we can attach to the process just by giving the
 217     # process ID.
 218
 219     set test "attach2, with no file"
 220     set found_exec_file 0
 221     gdb_test_multiple "attach $testpid" "$test" {
 222         -re "Attaching to process $testpid.*Load new symbol table from \"$sysroot$escapedbinfile\.exe\".*y or n. $" {
 223             # On Cygwin, the DLL's symbol tables are loaded prior to the
 224             # executable's symbol table.  This in turn always results in
 225             # asking the user for actually loading the symbol table of the
 226             # executable.
 227             gdb_test "y" "Reading symbols from $sysroot$escapedbinfile\.\.\.*done." \
 228                 "$test (reset file)"
 229
 230             set found_exec_file 1
 231         }
 232         -re "Attaching to process $testpid.*Reading symbols from $sysroot$escapedbinfile.*main.*at .*$gdb_prompt $" {
 233             pass "$test"
 234             set found_exec_file 1
 235         }
 236     }
 237
 238     if {$found_exec_file == 0} {
 239         set test "load file manually, after attach2"
 240         gdb_test_multiple "file $binfile" "$test" {
 241             -re "A program is being debugged already..*Are you sure you want to change the file.*y or n. $" {
 242                 gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*done." \
 243                     "$test (re-read)"
 244             }
 245             -re "Reading symbols from $escapedbinfile\.\.\.*done.*$gdb_prompt $" {
 246                 pass "$test"
 247             }
 248         }
 249     }
 250
 251     # Verify that we can modify the variable "should_exit" in the
 252     # program.
 253
 254     gdb_test_no_output "set should_exit=1" "after attach2, set should_exit"
 255
 256     # Verify that the modification really happened.
 257
 258     gdb_breakpoint [gdb_get_line_number "postloop"] temporary
 259     gdb_continue_to_breakpoint "postloop" ".* postloop .*"
 260
 261     # Allow the test process to exit, to cleanup after ourselves.
 262
 263     gdb_continue_to_end "after attach2, exit"
 264
 265     # Make sure we don't leave a process around to confuse
 266     # the next test run (and prevent the compile by keeping
 267     # the text file busy), in case the "set should_exit" didn't
 268     # work.
 269
 270     kill_wait_spawned_process $test_spawn_id
 271
 272     set test_spawn_id [spawn_wait_for_attach $binfile]
 273     set testpid [spawn_id_get_pid $test_spawn_id]
 274
 275     # Verify that we can attach to the process, and find its a.out
 276     # when we're cd'd to some directory that doesn't contain the
 277     # a.out.  (We use the source path set by the "dir" command.)
 278
 279     gdb_test "dir [standard_output_file {}]" "Source directories searched: .*" \
 280         "set source path"
 281
 282     gdb_test "cd /tmp" "Working directory /tmp." \
 283         "cd away from process working directory"
 284
 285     # Explicitly flush out any knowledge of the previous attachment.
 286
 287     set test "before attach3, flush symbols"
 288     gdb_test_multiple "symbol-file" "$test" {
 289         -re "Discard symbol table from.*y or n. $" {
 290             gdb_test "y" "No symbol file now." \
 291                 "$test"
 292         }
 293         -re "No symbol file now.*$gdb_prompt $" {
 294             pass "$test"
 295         }
 296     }
 297
 298     gdb_test "exec" "No executable file now." \
 299         "before attach3, flush exec"
 300
 301     gdb_test "attach $testpid" \
 302         "Attaching to process $testpid.*Reading symbols from $sysroot$escapedbinfile.*main.*at .*" \
 303         "attach when process' a.out not in cwd"
 304
 305     set test "after attach3, exit"
 306     gdb_test "kill" \
 307         "" \
 308         "$test" \
 309         "Kill the program being debugged.*y or n. $" \
 310         "y"
 311
 312     # Another "don't leave a process around"
 313     kill_wait_spawned_process $test_spawn_id
 314 }
 315
 316 proc do_call_attach_tests {} {
 317     global gdb_prompt
 318     global binfile2
 319
 320     set test_spawn_id [spawn_wait_for_attach $binfile2]
 321     set testpid [spawn_id_get_pid $test_spawn_id]
 322
 323     # Attach
 324
 325     gdb_test "file $binfile2" ".*" "load file"
 326     set test "attach call"
 327     gdb_test_multiple "attach $testpid" "$test" {
 328         -re "warning: reading register.*I.*O error.*$gdb_prompt $" {
 329             fail "$test (read register error)"
 330         }
 331         -re "Attaching to.*process $testpid.*libc.*$gdb_prompt $" {
 332             pass "$test"
 333         }
 334         -re "Attaching to.*process $testpid.*\[Switching to thread $testpid\..*\].*$gdb_prompt $" {
 335             pass "$test"
 336         }
 337     }
 338
 339     # See if other registers are problems
 340
 341     set test "info other register"
 342     gdb_test_multiple "i r r3" "$test" {
 343         -re "warning: reading register.*$gdb_prompt $" {
 344             fail "$test"
 345         }
 346         -re "r3.*$gdb_prompt $" {
 347             pass "$test"
 348         }
 349     }
 350
 351     # Get rid of the process
 352
 353     gdb_test "p should_exit = 1"
 354     gdb_continue_to_end
 355
 356     # Be paranoid
 357
 358     kill_wait_spawned_process $test_spawn_id
 359 }
 360
 361 proc do_command_attach_tests {} {
 362     global gdb_prompt
 363     global binfile
 364     global verbose
 365     global GDB
 366     global INTERNAL_GDBFLAGS
 367     global GDBFLAGS
 368
 369     if ![isnative] then {
 370         unsupported "command attach test"
 371         return 0
 372     }
 373
 374     set test_spawn_id [spawn_wait_for_attach $binfile]
 375     set testpid [spawn_id_get_pid $test_spawn_id]
 376
 377     gdb_exit
 378
 379     set res [gdb_spawn_with_cmdline_opts "--pid=$testpid"]
 380     set test "starting with --pid"
 381     gdb_test_multiple "" $test {
 382         -re "Reading symbols from.*$gdb_prompt $" {
 383             pass "$test"
 384         }
 385     }
 386
 387     # Get rid of the process
 388     kill_wait_spawned_process $test_spawn_id
 389 }
 390
 391 # Test ' gdb --pid PID -ex "run" '.  GDB used to have a bug where
 392 # "run" would run before the attach finished - PR17347.
 393
 394 proc test_command_line_attach_run {} {
 395     global gdb_prompt
 396     global binfile
 397
 398     if ![isnative] then {
 399         unsupported "commandline attach run test"
 400         return 0
 401     }
 402
 403     with_test_prefix "cmdline attach run" {
 404         set test_spawn_id [spawn_wait_for_attach $binfile]
 405         set testpid [spawn_id_get_pid $test_spawn_id]
 406
 407         set test "run to prompt"
 408         gdb_exit
 409
 410         set res [gdb_spawn_with_cmdline_opts \
 411                      "-iex \"set height 0\" -iex \"set width 0\" --pid=$testpid -ex \"start\""]
 412         if { $res != 0} {
 413             fail $test
 414             kill_wait_spawned_process $test_spawn_id
 415             return $res
 416         }
 417         gdb_test_multiple "" $test {
 418             -re {Attaching to.*Start it from the beginning\? \(y or n\) } {
 419                 pass $test
 420             }
 421         }
 422
 423         send_gdb "y\n"
 424
 425         set test "run to main"
 426         gdb_test_multiple "" $test {
 427             -re "Temporary breakpoint .* main .*$gdb_prompt $" {
 428                 pass $test
 429             }
 430         }
 431
 432         # Get rid of the process
 433         kill_wait_spawned_process $test_spawn_id
 434     }
 435 }
 436
 437 # Start with a fresh gdb
 438
 439 gdb_exit
 440 gdb_start
 441 gdb_reinitialize_dir $srcdir/$subdir
 442 gdb_load ${binfile}
 443
 444 # This is a test of gdb's ability to attach to a running process.
 445
 446 do_attach_tests
 447
 448 # Test attaching when the target is inside a system call
 449
 450 gdb_exit
 451 gdb_start
 452
 453 gdb_reinitialize_dir $srcdir/$subdir
 454 do_call_attach_tests
 455
 456 # Test "gdb --pid"
 457
 458 do_command_attach_tests
 459
 460 test_command_line_attach_run
 461
 462 return 0