gdb/testsuite/gdb.base/attach.exp

   1 # Copyright 1997-2017 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
  57     # Figure out a regular expression that will match the sysroot,
  58     # noting that the default sysroot is "target:", and also noting
  59     # that GDB will strip "target:" from the start of filenames when
  60     # operating on the local filesystem
  61     set sysroot ""
  62     set test "show sysroot"
  63     gdb_test_multiple $test $test {
  64         -re "The current system root is \"(.*)\"\..*${gdb_prompt} $" {
  65             set sysroot $expect_out(1,string)
  66         }
  67     }
  68     regsub "^target:" "$sysroot" "(target:)?" sysroot
  69
  70     # Start the program running and then wait for a bit, to be sure
  71     # that it can be attached to.
  72
  73     set test_spawn_id [spawn_wait_for_attach $binfile]
  74     set testpid [spawn_id_get_pid $test_spawn_id]
  75
  76     # Verify that we cannot attach to nonsense.
  77
  78     set test "attach to nonsense is prohibited"
  79     gdb_test_multiple "attach abc" "$test" {
  80         -re "Illegal process-id: abc\\.\r\n$gdb_prompt $" {
  81             pass "$test"
  82         }
  83         -re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
  84             # Response expected from /proc-based systems.
  85             pass "$test"
  86         }
  87         -re "Can't attach to process..*$gdb_prompt $" {
  88             # Response expected on Cygwin
  89             pass "$test"
  90         }
  91         -re "Attaching to.*$gdb_prompt $" {
  92             fail "$test (bogus pid allowed)"
  93         }
  94     }
  95
  96     # Verify that we cannot attach to nonsense even if its initial part is
  97     # a valid PID.
  98
  99     set test "attach to digits-starting nonsense is prohibited"
 100     gdb_test_multiple "attach ${testpid}x" "$test" {
 101         -re "Illegal process-id: ${testpid}x\\.\r\n$gdb_prompt $" {
 102             pass "$test"
 103         }
 104         -re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
 105             # Response expected from /proc-based systems.
 106             pass "$test"
 107         }
 108         -re "Can't attach to process..*$gdb_prompt $" {
 109             # Response expected on Cygwin
 110             pass "$test"
 111         }
 112         -re "Attaching to.*$gdb_prompt $" {
 113             fail "$test (bogus pid allowed)"
 114         }
 115     }
 116
 117     # Verify that we cannot attach to what appears to be a valid
 118     # process ID, but is a process that doesn't exist.  Traditionally,
 119     # most systems didn't have a process with ID 0, so we take that as
 120     # the default.  However, there are a few exceptions.
 121
 122     set boguspid 0
 123     if { [istarget "*-*-*bsd*"] } {
 124         # In FreeBSD 5.0, PID 0 is used for "swapper".  Use -1 instead
 125         # (which should have the desired effect on any version of
 126         # FreeBSD, and probably other *BSD's too).
 127         set boguspid -1
 128     }
 129     set test "attach to nonexistent process is prohibited"
 130     gdb_test_multiple "attach $boguspid" "$test" {
 131         -re "Attaching to.*, process $boguspid.*No such process.*$gdb_prompt $" {
 132             # Response expected on ptrace-based systems (i.e. HP-UX 10.20).
 133             pass "$test"
 134         }
 135         -re "Attaching to.*, process $boguspid failed.*Hint.*$gdb_prompt $" {
 136             # Response expected on ttrace-based systems (i.e. HP-UX 11.0).
 137             pass "$test"
 138         }
 139         -re "Attaching to.*, process $boguspid.*denied.*$gdb_prompt $" {
 140             pass "$test"
 141         }
 142         -re "Attaching to.*, process $boguspid.*not permitted.*$gdb_prompt $" {
 143             pass "$test"
 144         }
 145         -re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
 146             # Response expected from /proc-based systems.
 147             pass "$test"
 148         }
 149         -re "Can't attach to process..*$gdb_prompt $" {
 150             # Response expected on Cygwin
 151             pass "$test"
 152         }
 153         -re "Attaching to.*, process $boguspid.*failed.*$gdb_prompt $" {
 154             # Response expected on the extended-remote target.
 155             pass "$test"
 156         }
 157     }
 158
 159     # Verify that we can attach to the process by first giving its
 160     # executable name via the file command, and using attach with the
 161     # process ID.
 162
 163     # (Actually, the test system appears to do this automatically for
 164     # us.  So, we must also be prepared to be asked if we want to
 165     # discard an existing set of symbols.)
 166
 167     set test "set file, before attach1"
 168     gdb_test_multiple "file $binfile" "$test" {
 169         -re "Load new symbol table from.*y or n. $" {
 170             gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*done." \
 171                 "$test (re-read)"
 172         }
 173         -re "Reading symbols from $escapedbinfile\.\.\.*done.*$gdb_prompt $" {
 174             pass "$test"
 175         }
 176     }
 177
 178     set test "attach1, after setting file"
 179     gdb_test_multiple "attach $testpid" "$test" {
 180         -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*main.*at .*$srcfile:.*$gdb_prompt $" {
 181             pass "$test"
 182         }
 183         -re "Attaching to program.*`?$escapedbinfile\.exe'?, process $testpid.*\[Switching to thread $testpid\..*\].*$gdb_prompt $" {
 184             # Response expected on Cygwin
 185             pass "$test"
 186         }
 187     }
 188
 189     # Verify that we can "see" the variable "should_exit" in the
 190     # program, and that it is zero.
 191
 192     gdb_test "print should_exit" " = 0" "after attach1, print should_exit"
 193
 194     # Detach the process.
 195
 196     gdb_test "detach" \
 197         "Detaching from program: .*$escapedbinfile, process $testpid" \
 198         "attach1 detach"
 199
 200     # Wait a bit for gdb to finish detaching
 201
 202     exec sleep 5
 203
 204     # Purge the symbols from gdb's brain.  (We want to be certain the
 205     # next attach, which won't be preceded by a "file" command, is
 206     # really getting the executable file without our help.)
 207
 208     set old_timeout $timeout
 209     set timeout 15
 210     set test "attach1, purging symbols after detach"
 211     gdb_test_multiple "file" "$test" {
 212         -re "No executable file now.*Discard symbol table.*y or n. $" {
 213             gdb_test "y" "No symbol file now." "$test"
 214         }
 215     }
 216     set timeout $old_timeout
 217
 218     # Verify that we can attach to the process just by giving the
 219     # process ID.
 220
 221     set test "attach2, with no file"
 222     set found_exec_file 0
 223     gdb_test_multiple "attach $testpid" "$test" {
 224         -re "Attaching to process $testpid.*Load new symbol table from \"$sysroot$escapedbinfile\.exe\".*y or n. $" {
 225             # On Cygwin, the DLL's symbol tables are loaded prior to the
 226             # executable's symbol table.  This in turn always results in
 227             # asking the user for actually loading the symbol table of the
 228             # executable.
 229             gdb_test "y" "Reading symbols from $sysroot$escapedbinfile\.\.\.*done." \
 230                 "$test (reset file)"
 231
 232             set found_exec_file 1
 233         }
 234         -re "Attaching to process $testpid.*Reading symbols from $sysroot$escapedbinfile.*main.*at .*$gdb_prompt $" {
 235             pass "$test"
 236             set found_exec_file 1
 237         }
 238     }
 239
 240     if {$found_exec_file == 0} {
 241         set test "load file manually, after attach2"
 242         gdb_test_multiple "file $binfile" "$test" {
 243             -re "A program is being debugged already..*Are you sure you want to change the file.*y or n. $" {
 244                 gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*done." \
 245                     "$test (re-read)"
 246             }
 247             -re "Reading symbols from $escapedbinfile\.\.\.*done.*$gdb_prompt $" {
 248                 pass "$test"
 249             }
 250         }
 251     }
 252
 253     # Verify that we can modify the variable "should_exit" in the
 254     # program.
 255
 256     gdb_test_no_output "set should_exit=1" "after attach2, set should_exit"
 257
 258     # Verify that the modification really happened.
 259
 260     gdb_breakpoint [gdb_get_line_number "postloop"] temporary
 261     gdb_continue_to_breakpoint "postloop" ".* postloop .*"
 262
 263     # Allow the test process to exit, to cleanup after ourselves.
 264
 265     gdb_continue_to_end "after attach2, exit"
 266
 267     # Make sure we don't leave a process around to confuse
 268     # the next test run (and prevent the compile by keeping
 269     # the text file busy), in case the "set should_exit" didn't
 270     # work.
 271
 272     kill_wait_spawned_process $test_spawn_id
 273
 274     set test_spawn_id [spawn_wait_for_attach $binfile]
 275     set testpid [spawn_id_get_pid $test_spawn_id]
 276
 277     # Verify that we can attach to the process, and find its a.out
 278     # when we're cd'd to some directory that doesn't contain the
 279     # a.out.  (We use the source path set by the "dir" command.)
 280
 281     gdb_test "dir [standard_output_file {}]" "Source directories searched: .*" \
 282         "set source path"
 283
 284     gdb_test "cd /tmp" "Working directory /tmp." \
 285         "cd away from process working directory"
 286
 287     # Explicitly flush out any knowledge of the previous attachment.
 288
 289     set test "before attach3, flush symbols"
 290     gdb_test_multiple "symbol-file" "$test" {
 291         -re "Discard symbol table from.*y or n. $" {
 292             gdb_test "y" "No symbol file now." \
 293                 "$test"
 294         }
 295         -re "No symbol file now.*$gdb_prompt $" {
 296             pass "$test"
 297         }
 298     }
 299
 300     gdb_test "exec" "No executable file now." \
 301         "before attach3, flush exec"
 302
 303     gdb_test "attach $testpid" \
 304         "Attaching to process $testpid.*Reading symbols from $sysroot$escapedbinfile.*main.*at .*" \
 305         "attach when process' a.out not in cwd"
 306
 307     set test "after attach3, exit"
 308     gdb_test "kill" \
 309         "" \
 310         "$test" \
 311         "Kill the program being debugged.*y or n. $" \
 312         "y"
 313
 314     # Another "don't leave a process around"
 315     kill_wait_spawned_process $test_spawn_id
 316 }
 317
 318 proc do_call_attach_tests {} {
 319     global gdb_prompt
 320     global binfile2
 321
 322     set test_spawn_id [spawn_wait_for_attach $binfile2]
 323     set testpid [spawn_id_get_pid $test_spawn_id]
 324
 325     # Attach
 326
 327     gdb_test "file $binfile2" ".*" "force switch to gdb64, if necessary"
 328     set test "attach call"
 329     gdb_test_multiple "attach $testpid" "$test" {
 330         -re "warning: reading register.*I.*O error.*$gdb_prompt $" {
 331             fail "$test (read register error)"
 332         }
 333         -re "Attaching to.*process $testpid.*libc.*$gdb_prompt $" {
 334             pass "$test"
 335         }
 336         -re "Attaching to.*process $testpid.*\[Switching to thread $testpid\..*\].*$gdb_prompt $" {
 337             pass "$test"
 338         }
 339     }
 340
 341     # See if other registers are problems
 342
 343     set test "info other register"
 344     gdb_test_multiple "i r r3" "$test" {
 345         -re "warning: reading register.*$gdb_prompt $" {
 346             fail "$test"
 347         }
 348         -re "r3.*$gdb_prompt $" {
 349             pass "$test"
 350         }
 351     }
 352
 353     # Get rid of the process
 354
 355     gdb_test "p should_exit = 1"
 356     gdb_continue_to_end
 357
 358     # Be paranoid
 359
 360     kill_wait_spawned_process $test_spawn_id
 361 }
 362
 363 proc do_command_attach_tests {} {
 364     global gdb_prompt
 365     global binfile
 366     global verbose
 367     global GDB
 368     global INTERNAL_GDBFLAGS
 369     global GDBFLAGS
 370
 371     if ![isnative] then {
 372         unsupported "command attach test"
 373         return 0
 374     }
 375
 376     set test_spawn_id [spawn_wait_for_attach $binfile]
 377     set testpid [spawn_id_get_pid $test_spawn_id]
 378
 379     gdb_exit
 380
 381     set res [gdb_spawn_with_cmdline_opts "--pid=$testpid"]
 382     set test "starting with --pid"
 383     gdb_test_multiple "" $test {
 384         -re "Reading symbols from.*$gdb_prompt $" {
 385             pass "$test"
 386         }
 387     }
 388
 389     # Get rid of the process
 390     kill_wait_spawned_process $test_spawn_id
 391 }
 392
 393 # Test ' gdb --pid PID -ex "run" '.  GDB used to have a bug where
 394 # "run" would run before the attach finished - PR17347.
 395
 396 proc test_command_line_attach_run {} {
 397     global gdb_prompt
 398     global binfile
 399
 400     if ![isnative] then {
 401         unsupported "commandline attach run test"
 402         return 0
 403     }
 404
 405     with_test_prefix "cmdline attach run" {
 406         set test_spawn_id [spawn_wait_for_attach $binfile]
 407         set testpid [spawn_id_get_pid $test_spawn_id]
 408
 409         set test "run to prompt"
 410         gdb_exit
 411
 412         set res [gdb_spawn_with_cmdline_opts \
 413                      "-iex \"set height 0\" -iex \"set width 0\" --pid=$testpid -ex \"start\""]
 414         if { $res != 0} {
 415             fail $test
 416             kill_wait_spawned_process $test_spawn_id
 417             return $res
 418         }
 419         gdb_test_multiple "" $test {
 420             -re {Attaching to.*Start it from the beginning\? \(y or n\) } {
 421                 pass $test
 422             }
 423         }
 424
 425         send_gdb "y\n"
 426
 427         set test "run to main"
 428         gdb_test_multiple "" $test {
 429             -re "Temporary breakpoint .* main .*$gdb_prompt $" {
 430                 pass $test
 431             }
 432         }
 433
 434         # Get rid of the process
 435         kill_wait_spawned_process $test_spawn_id
 436     }
 437 }
 438
 439 # Start with a fresh gdb
 440
 441 gdb_exit
 442 gdb_start
 443 gdb_reinitialize_dir $srcdir/$subdir
 444 gdb_load ${binfile}
 445
 446 # This is a test of gdb's ability to attach to a running process.
 447
 448 do_attach_tests
 449
 450 # Test attaching when the target is inside a system call
 451
 452 gdb_exit
 453 gdb_start
 454
 455 gdb_reinitialize_dir $srcdir/$subdir
 456 do_call_attach_tests
 457
 458 # Test "gdb --pid"
 459
 460 do_command_attach_tests
 461
 462 test_command_line_attach_run
 463
 464 return 0