gnu/dist/gdb6/gdb/testsuite/gdb.base/foll-fork.exp

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