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

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