gdb/testsuite/gdb.base/foll-vfork.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 # NOTE drow/2002-12-06: I don't know what the referenced kernel problem
  32 # is, but it appears to be fixed in recent HP/UX versions.
  33
  34 ##if [istarget "hppa2.0w-hp-hpux*"] {
  35 ##  warning "Don't run gdb.base/foll-vfork.exp until JAGaa43495 kernel problem is fixed."
  36 ##  return 0
  37 ##}
  38
  39 set testfile "foll-vfork"
  40 set testfile2 "vforked-prog"
  41 set srcfile ${testfile}.c
  42 set srcfile2 ${testfile2}.c
  43 set binfile ${objdir}/${subdir}/${testfile}
  44 set binfile2 ${objdir}/${subdir}/${testfile2}
  45
  46 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  47      untested foll-vfork.exp
  48      return -1
  49 }
  50
  51 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable {debug}] != "" } {
  52      untested foll-vfork.exp
  53      return -1
  54 }
  55
  56
  57 # Until "set follow-fork-mode" and "catch vfork" are implemented on
  58 # other targets...
  59 #
  60 if ![istarget "hppa*-hp-hpux*"] then {
  61     continue
  62 }
  63
  64 # Test to see if we are on an HP-UX 10.20 and if so,
  65 # do not run these tests as catching vfork is disabled for
  66 # 10.20.
  67
  68 if [istarget "hppa*-hp-hpux10.20"] then {
  69     return 0
  70 }
  71
  72 # A few of these tests require a little more time than the standard
  73 # timeout allows.
  74 set oldtimeout $timeout
  75 set timeout [expr "$timeout + 10"]
  76
  77 proc vfork_parent_follow_through_step {} {
  78    global gdb_prompt
  79
  80    send_gdb "set follow parent\n"
  81    gdb_expect {
  82       -re "$gdb_prompt $" {pass "set follow parent, vfork through step"}
  83       timeout         {fail "set follow parent, vfork through step"}
  84    }
  85    send_gdb "next\n"
  86    gdb_expect {
  87       -re "Detaching after fork from.*13.*$gdb_prompt "\
  88                       {pass "vfork parent follow, through step"}
  89       -re "$gdb_prompt $" {fail "vfork parent follow, through step"}
  90       timeout         {fail "(timeout) vfork parent follow, through step" }
  91    }
  92    # The child has been detached; allow time for any output it might
  93    # generate to arrive, so that output doesn't get confused with
  94    # any gdb_expected debugger output from a subsequent testpoint.
  95    #
  96    exec sleep 1
  97 }
  98
  99 proc vfork_parent_follow_to_bp {} {
 100    global gdb_prompt
 101
 102    send_gdb "set follow parent\n"
 103    gdb_expect {
 104       -re "$gdb_prompt $" {pass "set follow parent, vfork to bp"}
 105       timeout         {fail "set follow parent, vfork to bp"}
 106    }
 107    send_gdb "break 18\n"
 108    gdb_expect {
 109       -re "$gdb_prompt $" {pass "break, vfork to bp"}
 110       timeout         {fail "break, vfork to bp"}
 111    }
 112    send_gdb "continue\n"
 113    gdb_expect {
 114       -re ".*Detaching after fork from process.*Breakpoint.*18.*$gdb_prompt "\
 115                       {pass "vfork parent follow, to bp"}
 116       -re "$gdb_prompt $" {fail "vfork parent follow, to bp"}
 117       timeout         {fail "(timeout) vfork parent follow, to bp" }
 118    }
 119    # The child has been detached; allow time for any output it might
 120    # generate to arrive, so that output doesn't get confused with
 121    # any expected debugger output from a subsequent testpoint.
 122    #
 123    exec sleep 1
 124 }
 125
 126 proc vfork_and_exec_child_follow_to_main_bp {} {
 127    global gdb_prompt
 128    global binfile
 129
 130    send_gdb "set follow child\n"
 131    gdb_expect {
 132       -re "$gdb_prompt $" {pass "set follow child, vfork and exec to main bp"}
 133       timeout         {fail "set follow child, vfork and exec to main bp"}
 134    }
 135    send_gdb "continue\n"
 136    gdb_expect {
 137       -re "Detaching from program.*Attaching after fork to.*Executing new program.*Breakpoint.*vforked-prog.c:9.*$gdb_prompt "\
 138                       {pass "vfork and exec child follow, to main bp"}
 139       -re "$gdb_prompt $" {fail "vfork and exec child follow, to main bp"}
 140       timeout         {fail "(timeout) vfork and exec child follow, to main bp" }
 141    }
 142    # The parent has been detached; allow time for any output it might
 143    # generate to arrive, so that output doesn't get confused with
 144    # any gdb_expected debugger output from a subsequent testpoint.
 145    #
 146    exec sleep 1
 147
 148    # Explicitly kill this child, or a subsequent rerun actually runs
 149    # the exec'd child, not the original program...
 150    send_gdb "kill\n"
 151    gdb_expect {
 152       -re ".*Kill the program being debugged.*y or n. $" {
 153          send_gdb "y\n"
 154          send_gdb "file $binfile\n"
 155          gdb_expect {
 156             -re ".*Load new symbol table from.*y or n. $" {
 157                send_gdb "y\n"
 158                gdb_expect {
 159                   -re "Reading symbols from.*$gdb_prompt $" {}
 160                   timeout { fail "loading symbols (timeout)"; return }
 161                }
 162             }
 163             -re ".*gdb_prompt $" {}
 164             timeout { fail "loading symbols (timeout)"; return }
 165           }
 166       }
 167       -re ".*$gdb_prompt $" {}
 168       timeout { fail "killing inferior (timeout)" ; return }
 169     }
 170 }
 171
 172 proc vfork_and_exec_child_follow_through_step {} {
 173    global gdb_prompt
 174    global binfile
 175
 176 # This test cannot be performed prior to HP-UX 10.30, because ptrace-based
 177 # debugging of a vforking program basically doesn't allow the child to do
 178 # things like hit a breakpoint between a vfork and exec.  This means that
 179 # saying "set follow child; next" at a vfork() call won't work, because
 180 # the implementation of "next" sets a "step resume" breakpoint at the
 181 # return from the vfork(), which the child will hit on its way to exec'ing.
 182 #
 183    if { ![istarget "hppa*-*-hpux11.*"] } {
 184       verbose "vfork child-following next test ignored for non-hppa or pre-HP/UX-10.30 targets."
 185       return 0
 186    }
 187
 188    send_gdb "set follow child\n"
 189    gdb_expect {
 190       -re "$gdb_prompt $" {pass "set follow child, vfork and exec through step"}
 191       timeout         {fail "set follow child, vfork and exec through step"}
 192    }
 193    send_gdb "next\n"
 194    gdb_expect {
 195       -re "Detaching from program.*Attaching after fork to.*Executing new program.*Breakpoint.*vforked-prog.c:9.*$gdb_prompt "\
 196                       {pass "vfork and exec child follow, through step"}
 197       -re "$gdb_prompt $" {fail "vfork and exec child follow, through step"}
 198       timeout         {fail "(timeout) vfork and exec child follow, through step" }
 199    }
 200    # The parent has been detached; allow time for any output it might
 201    # generate to arrive, so that output doesn't get confused with
 202    # any expected debugger output from a subsequent testpoint.
 203    #
 204    exec sleep 1
 205
 206    # Explicitly kill this child, or a subsequent rerun actually runs
 207    # the exec'd child, not the original program...
 208    send_gdb "kill\n"
 209    gdb_expect {
 210       -re ".*Kill the program being debugged.*y or n. $" {
 211          send_gdb "y\n"
 212          send_gdb "file $binfile\n"
 213          gdb_expect {
 214             -re ".*Load new symbol table from.*y or n. $" {
 215                send_gdb "y\n"
 216                gdb_expect {
 217                   -re "Reading symbols from.*$gdb_prompt $" {}
 218                   timeout { fail "loading symbols (timeout)"; return }
 219                }
 220             }
 221             -re ".*gdb_prompt $" {}
 222             timeout { fail "loading symbols (timeout)"; return }
 223           }
 224       }
 225       -re ".*$gdb_prompt $" {}
 226       timeout { fail "killing inferior (timeout)" ; return }
 227     }
 228 }
 229
 230 proc tcatch_vfork_then_parent_follow {} {
 231    global gdb_prompt
 232    global srcfile
 233
 234    send_gdb "set follow parent\n"
 235    gdb_expect {
 236       -re "$gdb_prompt $" {pass "set follow parent, tcatch vfork"}
 237       timeout         {fail "set follow parent, tcatch vfork"}
 238    }
 239    send_gdb "tcatch vfork\n"
 240    gdb_expect {
 241       -re "Catchpoint .*(vfork).*$gdb_prompt $"\
 242                       {pass "vfork parent follow, set tcatch vfork"}
 243       -re "$gdb_prompt $" {fail "vfork parent follow, set tcatch vfork"}
 244       timeout         {fail "(timeout) vfork parent follow, set tcatch vfork"}
 245    }
 246    send_gdb "continue\n"
 247 # HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
 248 # stop you in "_vfork".
 249    gdb_expect {
 250       -re "0x\[0-9a-fA-F\]*.*vfork.*$gdb_prompt "\
 251                       {pass "vfork parent follow, tcatch vfork"}
 252       -re "0x\[0-9a-fA-F\]*.*_vfork.*$gdb_prompt "\
 253                       {pass "vfork parent follow, tcatch vfork"}
 254       -re "$gdb_prompt $" {fail "vfork parent follow, tcatch vfork"}
 255       timeout         {fail "(timeout) vfork parent follow, tcatch vfork"}
 256    }
 257    send_gdb "finish\n"
 258    gdb_expect {
 259       -re "Run till exit from.*vfork.*0x\[0-9a-fA-F\]* in main .* at .*${srcfile}:12.*$gdb_prompt "\
 260                       {pass "vfork parent follow, finish after tcatch vfork"}
 261       -re "$gdb_prompt $" {fail "vfork parent follow, finish after tcatch vfork"}
 262       timeout         {fail "(timeout) vfork parent follow, finish after tcatch vfork" }
 263    }
 264    # The child has been detached; allow time for any output it might
 265    # generate to arrive, so that output doesn't get confused with
 266    # any expected debugger output from a subsequent testpoint.
 267    #
 268    exec sleep 1
 269 }
 270
 271 proc tcatch_vfork_then_child_follow {} {
 272    global gdb_prompt
 273    global srcfile2
 274
 275    send_gdb "set follow child\n"
 276    gdb_expect {
 277       -re "$gdb_prompt $" {pass "set follow child, tcatch vfork"}
 278       timeout         {fail "set follow child, tcatch vfork"}
 279    }
 280    send_gdb "tcatch vfork\n"
 281    gdb_expect {
 282       -re "Catchpoint .*(vfork).*$gdb_prompt $"\
 283                       {pass "vfork child follow, set tcatch vfork"}
 284       -re "$gdb_prompt $" {fail "vfork child follow, set tcatch vfork"}
 285       timeout         {fail "(timeout) vfork child follow, set tcatch vfork"}
 286    }
 287    send_gdb "continue\n"
 288 # HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
 289 # stop you in "_vfork".
 290    gdb_expect {
 291       -re "0x\[0-9a-fA-F\]*.*vfork.*$gdb_prompt "\
 292                       {pass "vfork child follow, tcatch vfork"}
 293       -re "0x\[0-9a-fA-F\]*.*_vfork.*$gdb_prompt "\
 294                       {pass "vfork child follow, tcatch vfork"}
 295       -re "$gdb_prompt $" {fail "vfork child follow, tcatch vfork"}
 296       timeout         {fail "(timeout) vfork child follow, tcatch vfork"}
 297    }
 298    send_gdb "finish\n"
 299    gdb_expect {
 300       -re "Run till exit from.*vfork.*${srcfile2}:9.*$gdb_prompt "\
 301                       {pass "vfork child follow, finish after tcatch vfork"}
 302       -re "$gdb_prompt $" {fail "vfork child follow, finish after tcatch vfork"}
 303       timeout         {fail "(timeout) vfork child follow, finish after tcatch vfork" }
 304    }
 305    # The parent has been detached; allow time for any output it might
 306    # generate to arrive, so that output doesn't get confused with
 307    # any expected debugger output from a subsequent testpoint.
 308    #
 309    exec sleep 1
 310 }
 311
 312 proc do_vfork_and_exec_tests {} {
 313    global gdb_prompt
 314
 315    # Try following the parent process by stepping through a call to
 316    # vfork.  Do this without catchpoints.
 317    if [runto_main] then { vfork_parent_follow_through_step }
 318
 319    # Try following the parent process by setting a breakpoint on the
 320    # other side of a vfork, and running to that point.  Do this
 321    # without catchpoints.
 322    if [runto_main] then { vfork_parent_follow_to_bp }
 323
 324    # Try following the child process by just continuing through the
 325    # vfork, and letting the parent's breakpoint on "main" be auto-
 326    # magically reset in the child.
 327    #
 328    if [runto_main] then { vfork_and_exec_child_follow_to_main_bp }
 329
 330    # Try following the child process by stepping through a call to
 331    # vfork.  The child also executes an exec.  Since the child cannot
 332    # be debugged until after it has exec'd, and since there's a bp on
 333    # "main" in the parent, and since the bp's for the parent are
 334    # recomputed in the exec'd child, the step through a vfork should
 335    # land us in the "main" for the exec'd child, too.
 336    #
 337    if [runto_main] then { vfork_and_exec_child_follow_through_step }
 338
 339    # Try catching a vfork, and stepping out to the parent.
 340    #
 341    if [runto_main] then { tcatch_vfork_then_parent_follow }
 342
 343    # Try catching a vfork, and stepping out to the child.
 344    #
 345    if [runto_main] then { tcatch_vfork_then_child_follow }
 346
 347    # Test the ability to follow both child and parent of a vfork.  Do
 348    # this without catchpoints.
 349    # ??rehrauer: NYI.  Will add testpoints here when implemented.
 350    #
 351
 352    # Test the ability to have the debugger ask the user at vfork-time
 353    # whether to follow the parent, child or both.  Do this without
 354    # catchpoints.
 355    # ??rehrauer: NYI.  Will add testpoints here when implemented.
 356    #
 357 }
 358
 359 # Start with a fresh gdb
 360
 361 gdb_exit
 362 gdb_start
 363 gdb_reinitialize_dir $srcdir/$subdir
 364 gdb_load ${binfile}
 365
 366
 367 # This is a test of gdb's ability to follow the parent or child
 368 # of a Unix vfork() system call.  (The child will subsequently
 369 # call a variant of a Unix exec() system call.)
 370 #
 371 do_vfork_and_exec_tests
 372
 373 set timeout $oldtimeout
 374 return 0