gdb/testsuite/gdb.base/attach.exp

   1 # Copyright 1997-2014 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
  17 # On HP-UX 11.0, this test is causing a process running the program
  18 # "attach" to be left around spinning.  Until we figure out why, I am
  19 # commenting out the test to avoid polluting tiamat (our 11.0 nightly
  20 # test machine) with these processes. RT
  21 #
  22 # Setting the magic bit in the target app should work.  I added a
  23 # "kill", and also a test for the R3 register warning.  JB
  24 if { [istarget "hppa*-*-hpux*"] } {
  25     return 0
  26 }
  27
  28 # are we on a target board
  29 if [is_remote target] then {
  30     return 0
  31 }
  32
  33 standard_testfile attach.c attach2.c
  34 set binfile2 ${binfile}2
  35 set escapedbinfile  [string_to_regexp $binfile]
  36
  37 #execute_anywhere "rm -f ${binfile} ${binfile2}"
  38 remote_exec build "rm -f ${binfile} ${binfile2}"
  39 # For debugging this test
  40 #
  41 #log_user 1
  42
  43 # build the first test case
  44 #
  45 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  46     untested attach.exp
  47     return -1
  48 }
  49
  50 # Build the in-system-call test
  51
  52 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable {debug}] != "" } {
  53     untested attach.exp
  54     return -1
  55 }
  56
  57 if [get_compiler_info] {
  58     return -1
  59 }
  60
  61 proc do_attach_tests {} {
  62     global gdb_prompt
  63     global binfile
  64     global escapedbinfile
  65     global srcfile
  66     global testfile
  67     global subdir
  68     global timeout
  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 testpid [eval exec $binfile &]
  74     exec sleep 2
  75     if { [istarget "*-*-cygwin*"] } {
  76         # testpid is the Cygwin PID, GDB uses the Windows PID, which might be
  77         # different due to the way fork/exec works.
  78         set testpid [ exec ps -e | gawk "{ if (\$1 == $testpid) print \$4; }" ]
  79     }
  80
  81     # Verify that we cannot attach to nonsense.
  82
  83     set test "attach to nonsense is prohibited"
  84     gdb_test_multiple "attach abc" "$test" {
  85         -re "Illegal process-id: abc\\.\r\n$gdb_prompt $" {
  86             pass "$test"
  87         }
  88         -re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
  89             # Response expected from /proc-based systems.
  90             pass "$test"
  91         }
  92         -re "Can't attach to process..*$gdb_prompt $" {
  93             # Response expected on Cygwin
  94             pass "$test"
  95         }
  96         -re "Attaching to.*$gdb_prompt $" {
  97             fail "$test (bogus pid allowed)"
  98         }
  99     }
 100
 101     # Verify that we cannot attach to nonsense even if its initial part is
 102     # a valid PID.
 103
 104     set test "attach to digits-starting nonsense is prohibited"
 105     gdb_test_multiple "attach ${testpid}x" "$test" {
 106         -re "Illegal process-id: ${testpid}x\\.\r\n$gdb_prompt $" {
 107             pass "$test"
 108         }
 109         -re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
 110             # Response expected from /proc-based systems.
 111             pass "$test"
 112         }
 113         -re "Can't attach to process..*$gdb_prompt $" {
 114             # Response expected on Cygwin
 115             pass "$test"
 116         }
 117         -re "Attaching to.*$gdb_prompt $" {
 118             fail "$test (bogus pid allowed)"
 119         }
 120     }
 121
 122     # Verify that we cannot attach to what appears to be a valid
 123     # process ID, but is a process that doesn't exist.  Traditionally,
 124     # most systems didn't have a process with ID 0, so we take that as
 125     # the default.  However, there are a few exceptions.
 126
 127     set boguspid 0
 128     if { [istarget "*-*-*bsd*"] } {
 129         # In FreeBSD 5.0, PID 0 is used for "swapper".  Use -1 instead
 130         # (which should have the desired effect on any version of
 131         # FreeBSD, and probably other *BSD's too).
 132         set boguspid -1
 133     }
 134     set test "attach to nonexistent process is prohibited"
 135     gdb_test_multiple "attach $boguspid" "$test" {
 136         -re "Attaching to.*, process $boguspid.*No such process.*$gdb_prompt $" {
 137             # Response expected on ptrace-based systems (i.e. HP-UX 10.20).
 138             pass "$test"
 139         }
 140         -re "Attaching to.*, process $boguspid failed.*Hint.*$gdb_prompt $" {
 141             # Response expected on ttrace-based systems (i.e. HP-UX 11.0).
 142             pass "$test"
 143         }
 144         -re "Attaching to.*, process $boguspid.*denied.*$gdb_prompt $" {
 145             pass "$test"
 146         }
 147         -re "Attaching to.*, process $boguspid.*not permitted.*$gdb_prompt $" {
 148             pass "$test"
 149         }
 150         -re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
 151             # Response expected from /proc-based systems.
 152             pass "$test"
 153         }
 154         -re "Can't attach to process..*$gdb_prompt $" {
 155             # Response expected on Cygwin
 156             pass "$test"
 157         }
 158         -re "Attaching to.*, process $boguspid.*failed.*$gdb_prompt $" {
 159             # Response expected on the extended-remote target.
 160             pass "$test"
 161         }
 162     }
 163
 164     # Verify that we can attach to the process by first giving its
 165     # executable name via the file command, and using attach with the
 166     # process ID.
 167
 168     # (Actually, the test system appears to do this automatically for
 169     # us.  So, we must also be prepared to be asked if we want to
 170     # discard an existing set of symbols.)
 171
 172     set test "set file, before attach1"
 173     gdb_test_multiple "file $binfile" "$test" {
 174         -re "Load new symbol table from.*y or n. $" {
 175             gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*done." \
 176                 "$test (re-read)"
 177         }
 178         -re "Reading symbols from $escapedbinfile\.\.\.*done.*$gdb_prompt $" {
 179             pass "$test"
 180         }
 181     }
 182
 183     set test "attach1, after setting file"
 184     gdb_test_multiple "attach $testpid" "$test" {
 185         -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*main.*at .*$srcfile:.*$gdb_prompt $" {
 186             pass "$test"
 187         }
 188         -re "Attaching to program.*`?$escapedbinfile\.exe'?, process $testpid.*\[Switching to thread $testpid\..*\].*$gdb_prompt $" {
 189             # Response expected on Cygwin
 190             pass "$test"
 191         }
 192     }
 193
 194     # Verify that we can "see" the variable "should_exit" in the
 195     # program, and that it is zero.
 196
 197     gdb_test "print should_exit" " = 0" "after attach1, print should_exit"
 198
 199     # Detach the process.
 200
 201     gdb_test "detach" \
 202         "Detaching from program: .*$escapedbinfile, process $testpid" \
 203         "attach1 detach"
 204
 205     # Wait a bit for gdb to finish detaching
 206
 207     exec sleep 5
 208
 209     # Purge the symbols from gdb's brain.  (We want to be certain the
 210     # next attach, which won't be preceded by a "file" command, is
 211     # really getting the executable file without our help.)
 212
 213     set old_timeout $timeout
 214     set timeout 15
 215     set test "attach1, purging symbols after detach"
 216     gdb_test_multiple "file" "$test" {
 217         -re "No executable file now.*Discard symbol table.*y or n. $" {
 218             gdb_test "y" "No symbol file now." "$test"
 219         }
 220     }
 221     set timeout $old_timeout
 222
 223     # Verify that we can attach to the process just by giving the
 224     # process ID.
 225
 226     set test "attach2, with no file"
 227     set found_exec_file 0
 228     gdb_test_multiple "attach $testpid" "$test" {
 229         -re "Attaching to process $testpid.*Load new symbol table from \"$escapedbinfile\.exe\".*y or n. $" {
 230             # On Cygwin, the DLL's symbol tables are loaded prior to the
 231             # executable's symbol table.  This in turn always results in
 232             # asking the user for actually loading the symbol table of the
 233             # executable.
 234             gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*done." \
 235                 "$test (reset file)"
 236
 237             set found_exec_file 1
 238         }
 239         -re "Attaching to process $testpid.*Reading symbols from $escapedbinfile.*main.*at .*$gdb_prompt $" {
 240             pass "$test"
 241             set found_exec_file 1
 242         }
 243     }
 244
 245     if {$found_exec_file == 0} {
 246         set test "load file manually, after attach2"
 247         gdb_test_multiple "file $binfile" "$test" {
 248             -re "A program is being debugged already..*Are you sure you want to change the file.*y or n. $" {
 249                 gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*done." \
 250                     "$test (re-read)"
 251             }
 252             -re "Reading symbols from $escapedbinfile\.\.\.*done.*$gdb_prompt $" {
 253                 pass "$test"
 254             }
 255         }
 256     }
 257
 258     # Verify that we can modify the variable "should_exit" in the
 259     # program.
 260
 261     gdb_test_no_output "set should_exit=1" "after attach2, set should_exit"
 262
 263     # Verify that the modification really happened.
 264
 265     gdb_test "tbreak 19" "Temporary breakpoint .*at.*$srcfile, line 19.*" \
 266         "after attach2, set tbreak postloop"
 267
 268     gdb_test "continue" "main.*at.*$srcfile:19.*" \
 269         "after attach2, reach tbreak postloop"
 270
 271     # Allow the test process to exit, to cleanup after ourselves.
 272
 273     gdb_continue_to_end "after attach2, exit"
 274
 275     # Make sure we don't leave a process around to confuse
 276     # the next test run (and prevent the compile by keeping
 277     # the text file busy), in case the "set should_exit" didn't
 278     # work.
 279
 280     remote_exec build "kill -9 ${testpid}"
 281
 282     # Start the program running and then wait for a bit, to be sure
 283     # that it can be attached to.
 284
 285     set testpid [eval exec $binfile &]
 286     exec sleep 2
 287     if { [istarget "*-*-cygwin*"] } {
 288         # testpid is the Cygwin PID, GDB uses the Windows PID, which might be
 289         # different due to the way fork/exec works.
 290         set testpid [ exec ps -e | gawk "{ if (\$1 == $testpid) print \$4; }" ]
 291     }
 292
 293     # Verify that we can attach to the process, and find its a.out
 294     # when we're cd'd to some directory that doesn't contain the
 295     # a.out.  (We use the source path set by the "dir" command.)
 296
 297     gdb_test "dir [standard_output_file {}]" "Source directories searched: .*" \
 298         "set source path"
 299
 300     gdb_test "cd /tmp" "Working directory /tmp." \
 301         "cd away from process working directory"
 302
 303     # Explicitly flush out any knowledge of the previous attachment.
 304
 305     set test "before attach3, flush symbols"
 306     gdb_test_multiple "symbol-file" "$test" {
 307         -re "Discard symbol table from.*y or n. $" {
 308             gdb_test "y" "No symbol file now." \
 309                 "$test"
 310         }
 311         -re "No symbol file now.*$gdb_prompt $" {
 312             pass "$test"
 313         }
 314     }
 315
 316     gdb_test "exec" "No executable file now." \
 317         "before attach3, flush exec"
 318
 319     gdb_test "attach $testpid" \
 320         "Attaching to process $testpid.*Reading symbols from $escapedbinfile.*main.*at .*" \
 321         "attach when process' a.out not in cwd"
 322
 323     set test "after attach3, exit"
 324     gdb_test "kill" \
 325         "" \
 326         "$test" \
 327         "Kill the program being debugged.*y or n. $" \
 328         "y"
 329
 330     # Another "don't leave a process around"
 331     remote_exec build "kill -9 ${testpid}"
 332 }
 333
 334 proc do_call_attach_tests {} {
 335     global gdb_prompt
 336     global binfile2
 337
 338     # Start the program running and then wait for a bit, to be sure
 339     # that it can be attached to.
 340
 341     set testpid [eval exec $binfile2 &]
 342     exec sleep 2
 343     if { [istarget "*-*-cygwin*"] } {
 344         # testpid is the Cygwin PID, GDB uses the Windows PID, which might be
 345         # different due to the way fork/exec works.
 346         set testpid [ exec ps -e | gawk "{ if (\$1 == $testpid) print \$4; }" ]
 347     }
 348
 349     # Attach
 350
 351     gdb_test "file $binfile2" ".*" "force switch to gdb64, if necessary"
 352     set test "attach call"
 353     gdb_test_multiple "attach $testpid" "$test" {
 354         -re "warning: reading register.*I.*O error.*$gdb_prompt $" {
 355             fail "$test (read register error)"
 356         }
 357         -re "Attaching to.*process $testpid.*libc.*$gdb_prompt $" {
 358             pass "$test"
 359         }
 360         -re "Attaching to.*process $testpid.*\[Switching to thread $testpid\..*\].*$gdb_prompt $" {
 361             pass "$test"
 362         }
 363     }
 364
 365     # See if other registers are problems
 366
 367     set test "info other register"
 368     gdb_test_multiple "i r r3" "$test" {
 369         -re "warning: reading register.*$gdb_prompt $" {
 370             fail "$test"
 371         }
 372         -re "r3.*$gdb_prompt $" {
 373             pass "$test"
 374         }
 375     }
 376
 377     # Get rid of the process
 378
 379     gdb_test "p should_exit = 1"
 380     gdb_continue_to_end
 381
 382     # Be paranoid
 383
 384     remote_exec build "kill -9 ${testpid}"
 385 }
 386
 387 proc do_command_attach_tests {} {
 388     global gdb_prompt
 389     global binfile
 390     global verbose
 391     global GDB
 392     global INTERNAL_GDBFLAGS
 393     global GDBFLAGS
 394
 395     if ![isnative] then {
 396         unsupported "command attach test"
 397         return 0
 398     }
 399
 400     # Start the program running and then wait for a bit, to be sure
 401     # that it can be attached to.
 402
 403     set testpid [eval exec $binfile &]
 404     exec sleep 2
 405     if { [istarget "*-*-cygwin*"] } {
 406         # testpid is the Cygwin PID, GDB uses the Windows PID, which might be
 407         # different due to the way fork/exec works.
 408         set testpid [ exec ps -e | gawk "{ if (\$1 == $testpid) print \$4; }" ]
 409     }
 410
 411     gdb_exit
 412     if $verbose>1 then {
 413         send_user "Spawning $GDB $INTERNAL_GDBFLAGS $GDBFLAGS --pid=$testpid\n"
 414     }
 415
 416     eval "spawn $GDB $INTERNAL_GDBFLAGS $GDBFLAGS --pid=$testpid"
 417     set test "starting with --pid"
 418     expect {
 419         -re "Reading symbols from.*$gdb_prompt $" {
 420             pass "$test"
 421         }
 422         timeout {
 423             fail "$test (timeout)"
 424         }
 425     }
 426
 427     # Get rid of the process
 428
 429     remote_exec build "kill -9 ${testpid}"
 430 }
 431
 432
 433 # Start with a fresh gdb
 434
 435 gdb_exit
 436 gdb_start
 437 gdb_reinitialize_dir $srcdir/$subdir
 438 gdb_load ${binfile}
 439
 440 # This is a test of gdb's ability to attach to a running process.
 441
 442 do_attach_tests
 443
 444 # Test attaching when the target is inside a system call
 445
 446 gdb_exit
 447 gdb_start
 448
 449 gdb_reinitialize_dir $srcdir/$subdir
 450 do_call_attach_tests
 451
 452 # Test "gdb --pid"
 453
 454 do_command_attach_tests
 455
 456 return 0