gdb/testsuite/gdb.base/foll-fork.exp

   1 #   Copyright 1997, 1999, 2007 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 2 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, write to the Free Software
  15 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  16
  17 # Please email any bugs, comments, and/or additions to this file to:
  18 # bug-gdb@prep.ai.mit.edu
  19
  20 if $tracelevel then {
  21         strace $tracelevel
  22         }
  23
  24 if { ![isnative] } then {
  25     continue
  26 }
  27
  28 set prms_id 0
  29 set bug_id 0
  30
  31 set testfile "foll-fork"
  32 set srcfile ${testfile}.c
  33 set binfile ${objdir}/${subdir}/${testfile}
  34
  35 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  36      untested foll-fork.exp
  37      return -1
  38 }
  39
  40
  41
  42 # Until "set follow-fork-mode" and "catch fork" are implemented on
  43 # other targets...
  44 #
  45 if ![istarget "hppa*-hp-hpux*"] then {
  46     continue
  47 }
  48
  49 proc default_fork_parent_follow {} {
  50    global gdb_prompt
  51
  52    send_gdb "show follow\n"
  53    gdb_expect {
  54       -re "Debugger response to a program call of fork or vfork is \"parent\"..*$gdb_prompt $"\
  55                       {pass "default show parent follow, no catchpoints"}
  56       -re "$gdb_prompt $" {fail "default show parent follow, no catchpoints"}
  57       timeout         {fail "(timeout) default show parent follow, no catchpoints"}
  58    }
  59    send_gdb "next 2\n"
  60    gdb_expect {
  61       -re "Detaching after fork from.*$gdb_prompt $"\
  62                       {pass "default parent follow, no catchpoints"}
  63       -re "$gdb_prompt $" {fail "default parent follow, no catchpoints"}
  64       timeout         {fail "(timeout) default parent follow, no catchpoints" }
  65    }
  66    # The child has been detached; allow time for any output it might
  67    # generate to arrive, so that output doesn't get confused with
  68    # any expected debugger output from a subsequent testpoint.
  69    #
  70    exec sleep 1
  71 }
  72
  73 proc explicit_fork_parent_follow {} {
  74    global gdb_prompt
  75
  76    send_gdb "set follow parent\n"
  77    gdb_expect {
  78       -re "$gdb_prompt $" {pass "set follow parent"}
  79       timeout         {fail "(timeout) set follow parent"}
  80    }
  81    send_gdb "show follow\n"
  82    gdb_expect {
  83       -re "Debugger response to a program call of fork or vfork is \"parent\"..*$gdb_prompt $"\
  84                       {pass "explicit show parent follow, no catchpoints"}
  85       -re "$gdb_prompt $" {fail "explicit show parent follow, no catchpoints"}
  86       timeout         {fail "(timeout) explicit show parent follow, no catchpoints"}
  87    }
  88    send_gdb "next 2\n"
  89    gdb_expect {
  90       -re "Detaching after fork from.*$gdb_prompt $"\
  91                       {pass "explicit parent follow, no catchpoints"}
  92       -re "$gdb_prompt $" {fail "explicit parent follow, no catchpoints"}
  93       timeout         {fail "(timeout) explicit parent follow, no catchpoints"}
  94    }
  95    # The child has been detached; allow time for any output it might
  96    # generate to arrive, so that output doesn't get confused with
  97    # any expected debugger output from a subsequent testpoint.
  98    #
  99    exec sleep 1
 100 }
 101
 102 proc explicit_fork_child_follow {} {
 103    global gdb_prompt
 104
 105    send_gdb "set follow child\n"
 106    gdb_expect {
 107       -re "$gdb_prompt $" {pass "set follow child"}
 108       timeout         {fail "(timeout) set follow child"}
 109    }
 110    send_gdb "show follow\n"
 111    gdb_expect {
 112       -re "Debugger response to a program call of fork or vfork is \"child\"..*$gdb_prompt $"\
 113                       {pass "explicit show child follow, no catchpoints"}
 114       -re "$gdb_prompt $" {fail "explicit show child follow, no catchpoints"}
 115       timeout         {fail "(timeout) explicit show child follow, no catchpoints"}
 116    }
 117    send_gdb "next 2\n"
 118    gdb_expect {
 119       -re "Detaching from program:.*Attaching after fork to.*$gdb_prompt $"\
 120                       {pass "explicit child follow, no catchpoints"}
 121       -re "$gdb_prompt $" {fail "explicit child follow, no catchpoints"}
 122       timeout         {fail "(timeout) explicit child follow, no catchpoints"}
 123    }
 124    # The child has been detached; allow time for any output it might
 125    # generate to arrive, so that output doesn't get confused with
 126    # any gdb_expected debugger output from a subsequent testpoint.
 127    #
 128    exec sleep 1
 129 }
 130
 131 proc catch_fork_child_follow {} {
 132    global gdb_prompt
 133
 134    send_gdb "catch fork\n"
 135    gdb_expect {
 136       -re "Catchpoint .*(fork).*$gdb_prompt $"\
 137                       {pass "explicit child follow, set catch fork"}
 138       -re "$gdb_prompt $" {fail "explicit child follow, set catch fork"}
 139       timeout         {fail "(timeout) explicit child follow, set catch fork"}
 140    }
 141
 142    # Verify that the catchpoint is mentioned in an "info breakpoints",
 143    # and further that the catchpoint mentions no process id.
 144    #
 145    send_gdb "info breakpoints\n"
 146    gdb_expect {
 147      -re ".*catch fork.*keep y.*$gdb_prompt $"\
 148                      {pass "info shows catchpoint without pid"}
 149      -re ".*catch fork.*process .*$gdb_prompt $"\
 150                      {fail "info shows catchpoint without pid"}
 151      -re "$gdb_prompt $" {fail "info shows catchpoint without pid"}
 152      timeout         {fail "(timeout) info shows catchpoint without pid"}
 153    }
 154
 155    send_gdb "continue\n"
 156    gdb_expect {
 157       -re "Catchpoint.*(forked process.*),.*in _fork_sys.*$gdb_prompt $"\
 158                       {pass "explicit child follow, catch fork"}
 159       -re "$gdb_prompt $" {fail "explicit child follow, catch fork"}
 160       timeout         {fail "(timeout) explicit child follow, catch fork"}
 161    }
 162
 163    # Verify that the catchpoint is mentioned in an "info breakpoints",
 164    # and further that the catchpoint managed to capture a process id.
 165    #
 166    send_gdb "info breakpoints\n"
 167    gdb_expect {
 168      -re ".*catch fork .*process \[0-9\]+.*$gdb_prompt $"\
 169                      {pass "info shows catchpoint pid"}
 170      -re "$gdb_prompt $" {fail "info shows catchpoint pid"}
 171      timeout         {fail "(timeout) info shows catchpoint pid"}
 172    }
 173
 174    send_gdb "set follow child\n"
 175    gdb_expect {
 176       -re "$gdb_prompt $" {pass "set follow child"}
 177       timeout         {fail "(timeout) set follow child"}
 178    }
 179    send_gdb "tbreak 24\n"
 180    gdb_expect {
 181       -re "Breakpoint.*, line 24.*$gdb_prompt $"\
 182                       {pass "set follow child, tbreak"}
 183       -re "$gdb_prompt $" {fail "set follow child, tbreak"}
 184       timeout         {fail "(timeout) set follow child, tbreak"}
 185    }
 186    send_gdb "continue\n"
 187    gdb_expect {
 188       -re ".*Detaching from program:.*Attaching after fork to.* at .*24.*$gdb_prompt $"\
 189                       {pass "set follow child, hit tbreak"}
 190       -re "$gdb_prompt $" {fail "set follow child, hit tbreak"}
 191       timeout         {fail "(timeout) set follow child, hit tbreak"}
 192    }
 193    # The child has been detached; allow time for any output it might
 194    # generate to arrive, so that output doesn't get confused with
 195    # any expected debugger output from a subsequent testpoint.
 196    #
 197    exec sleep 1
 198    send_gdb "delete breakpoints\n"
 199    gdb_expect {
 200       -re "Delete all breakpoints.*$" {
 201          send_gdb "y\n"
 202          gdb_expect {
 203             -re "$gdb_prompt $"\
 204                     {pass "set follow child, cleanup"}
 205             timeout {fail "(timeout) set follow child, cleanup"}
 206          }
 207       }
 208       -re "$gdb_prompt $" {fail "set follow child, cleanup"}
 209       timeout         {fail "(timeout) set follow child, cleanup"}
 210    }
 211 }
 212
 213 proc tcatch_fork_parent_follow {} {
 214    global gdb_prompt
 215
 216    send_gdb "catch fork\n"
 217    gdb_expect {
 218       -re "Catchpoint .*(fork).*$gdb_prompt $"\
 219                       {pass "explicit parent follow, set tcatch fork"}
 220       -re "$gdb_prompt $" {fail "explicit parent follow, set tcatch fork"}
 221       timeout         {fail "(timeout) explicit parent follow, set tcatch fork"}
 222    }
 223 # ??rehrauer: I don't yet know how to get the id of the tcatch
 224 # via this script, so that I can add a -do list to it.  For now,
 225 # do the follow stuff after the catch happens.
 226
 227    send_gdb "continue\n"
 228    gdb_expect {
 229       -re ".*in _fork_sys.*$gdb_prompt $"\
 230                       {pass "explicit parent follow, tcatch fork"}
 231       -re "$gdb_prompt $" {fail "explicit parent follow, tcatch fork"}
 232       timeout         {fail "(timeout) explicit parent follow, tcatch fork"}
 233    }
 234    send_gdb "set follow parent\n"
 235    gdb_expect {
 236       -re "$gdb_prompt $" {pass "set follow parent"}
 237       timeout         {fail "(timeout) set follow parent"}
 238    }
 239    send_gdb "tbreak 24\n"
 240    gdb_expect {
 241       -re "Breakpoint.*, line 24.*$gdb_prompt $"\
 242                       {pass "set follow parent, tbreak"}
 243       -re "$gdb_prompt $" {fail "set follow parent, tbreak"}
 244       timeout         {fail "(timeout) set follow child, tbreak"}
 245    }
 246    send_gdb "continue\n"
 247    gdb_expect {
 248       -re ".*Detaching after fork from.* at .*24.*$gdb_prompt $"\
 249                       {pass "set follow parent, hit tbreak"}
 250       -re "$gdb_prompt $" {fail "set follow parent, hit tbreak"}
 251       timeout         {fail "(timeout) set follow parent, hit tbreak"}
 252    }
 253    # The child has been detached; allow time for any output it might
 254    # generate to arrive, so that output doesn't get confused with
 255    # any expected debugger output from a subsequent testpoint.
 256    #
 257    exec sleep 1
 258    send_gdb "delete breakpoints\n"
 259    gdb_expect {
 260       -re "Delete all breakpoints.*$" {
 261          send_gdb "y\n"
 262          gdb_expect {
 263             -re "$gdb_prompt $"\
 264                     {pass "set follow parent, cleanup"}
 265             timeout {fail "(timeout) set follow parent, cleanup"}
 266          }
 267       }
 268       -re "$gdb_prompt $" {fail "set follow parent, cleanup"}
 269       timeout         {fail "(timeout) set follow parent, cleanup"}
 270    }
 271 }
 272
 273 proc do_fork_tests {} {
 274    global gdb_prompt
 275
 276    # Verify that help is available for "set follow-fork-mode".
 277    #
 278    send_gdb "help set follow-fork-mode\n"
 279    gdb_expect {
 280       -re "Set debugger response to a program call of fork or vfork..*
 281 A fork or vfork creates a new process.  follow-fork-mode can be:.*
 282 .*parent  - the original process is debugged after a fork.*
 283 .*child   - the new process is debugged after a fork.*
 284 The unfollowed process will continue to run..*
 285 By default, the debugger will follow the parent process..*$gdb_prompt $"\
 286                       { pass "help set follow" }
 287       -re "$gdb_prompt $" { fail "help set follow" }
 288       timeout         { fail "(timeout) help set follow" }
 289    }
 290
 291    # Verify that we can set follow-fork-mode, using an abbreviation
 292    # for both the flag and its value.
 293    #
 294    send_gdb "set follow ch\n"
 295    send_gdb "show fol\n"
 296    gdb_expect {
 297      -re "Debugger response to a program call of fork or vfork is \"child\".*$gdb_prompt $"\
 298              {pass "set follow, using abbreviations"}
 299      timeout {fail "(timeout) set follow, using abbreviations"}
 300    }
 301
 302    # Verify that we cannot set follow-fork-mode to nonsense.
 303    #
 304    send_gdb "set follow chork\n"
 305    gdb_expect {
 306      -re "Undefined item: \"chork\".*$gdb_prompt $"\
 307                      {pass "set follow to nonsense is prohibited"}
 308      -re "$gdb_prompt $" {fail "set follow to nonsense is prohibited"}
 309      timeout         {fail "(timeout) set follow to nonsense is prohibited"}
 310    }
 311    send_gdb "set follow parent\n"
 312    gdb_expect {
 313      -re "$gdb_prompt $" {pass "set follow to nonsense is prohibited (reset parent)"}
 314      timeout         {fail "set follow to nonsense is prohibited (reset parent)"}
 315    }
 316
 317    # Test the default behaviour, which is to follow the parent of a
 318    # fork, and detach from the child.  Do this without catchpoints.
 319    #
 320    if [runto_main] then { default_fork_parent_follow }
 321
 322    # Test the ability to explicitly follow the parent of a fork, and
 323    # detach from the child.  Do this without catchpoints.
 324    #
 325    if [runto_main] then { explicit_fork_parent_follow }
 326
 327    # Test the ability to follow the child of a fork, and detach from
 328    # the parent.  Do this without catchpoints.
 329    #
 330    if [runto_main] then { explicit_fork_child_follow }
 331
 332    # Test the ability to follow both child and parent of a fork.  Do
 333    # this without catchpoints.
 334    # ??rehrauer: NYI.  Will add testpoints here when implemented.
 335    #
 336
 337    # Test the ability to have the debugger ask the user at fork-time
 338    # whether to follow the parent, child or both.  Do this without
 339    # catchpoints.
 340    # ??rehrauer: NYI.  Will add testpoints here when implemented.
 341    #
 342
 343    # Test the ability to catch a fork, specify that the child be
 344    # followed, and continue.  Make the catchpoint permanent.
 345    #
 346    if [runto_main] then { catch_fork_child_follow }
 347
 348    # Test the ability to catch a fork, specify via a -do clause that
 349    # the parent be followed, and continue.  Make the catchpoint temporary.
 350    #
 351    if [runto_main] then { tcatch_fork_parent_follow }
 352 }
 353
 354 # Start with a fresh gdb
 355
 356 gdb_exit
 357 gdb_start
 358 gdb_reinitialize_dir $srcdir/$subdir
 359 gdb_load ${binfile}
 360
 361
 362 # This is a test of gdb's ability to follow the parent, child or both
 363 # parent and child of a Unix fork() system call.
 364 #
 365 do_fork_tests
 366
 367 return 0