gdb/testsuite/gdb.base/foll-vfork.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 if { ![isnative] } then {
  25     continue
  26 }
  27
  28 set prms_id 0
  29 set bug_id 0
  30
  31 if [istarget "hppa2.0w-hp-hpux*"] {
  32   warning "Don't run gdb.base/foll-vfork.exp until JAGaa43495 kernel problem is fixed."
  33   return 0
  34 }
  35
  36 set testfile "foll-vfork"
  37 set testfile2 "vforked-prog"
  38 set srcfile ${testfile}.c
  39 set srcfile2 ${testfile2}.c
  40 set binfile ${objdir}/${subdir}/${testfile}
  41 set binfile2 ${objdir}/${subdir}/${testfile2}
  42
  43 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  44      gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
  45 }
  46
  47 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable {debug}] != "" } {
  48      gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
  49 }
  50
  51
  52 # Until "set follow-fork-mode" and "catch vfork" are implemented on
  53 # other targets...
  54 #
  55 if ![istarget "hppa*-hp-hpux*"] then {
  56     continue
  57 }
  58
  59 # Test to see if we are on an HP-UX 10.20 and if so,
  60 # do not run these tests as catching vfork is disabled for
  61 # 10.20.
  62
  63 if [istarget "hppa*-hp-hpux10.20"] then {
  64     return 0
  65 }
  66
  67 # A few of these tests require a little more time than the standard
  68 # timeout allows.
  69 set oldtimeout $timeout
  70 set timeout [expr "$timeout + 10"]
  71
  72 proc vfork_parent_follow_through_step {} {
  73    global gdb_prompt
  74
  75    send_gdb "set follow parent\n"
  76    gdb_expect {
  77       -re "$gdb_prompt $" {pass "set follow parent, vfork through step"}
  78       timeout         {fail "set follow parent, vfork through step"}
  79    }
  80    send_gdb "next\n"
  81    gdb_expect {
  82       -re "Detaching after fork from.*13.*$gdb_prompt "\
  83                       {pass "vfork parent follow, through step"}
  84       -re "$gdb_prompt $" {fail "vfork parent follow, through step"}
  85       timeout         {fail "(timeout) vfork parent follow, through step" }
  86    }
  87    # The child has been detached; allow time for any output it might
  88    # generate to arrive, so that output doesn't get confused with
  89    # any gdb_expected debugger output from a subsequent testpoint.
  90    #
  91    exec sleep 1
  92 }
  93
  94 proc vfork_parent_follow_to_bp {} {
  95    global gdb_prompt
  96
  97    send_gdb "set follow parent\n"
  98    gdb_expect {
  99       -re "$gdb_prompt $" {pass "set follow parent, vfork to bp"}
 100       timeout         {fail "set follow parent, vfork to bp"}
 101    }
 102    send_gdb "break 18\n"
 103    gdb_expect {
 104       -re "$gdb_prompt $" {pass "break, vfork to bp"}
 105       timeout         {fail "break, vfork to bp"}
 106    }
 107    send_gdb "continue\n"
 108    gdb_expect {
 109       -re ".*Detaching after fork from process.*Breakpoint.*18.*$gdb_prompt "\
 110                       {pass "vfork parent follow, to bp"}
 111       -re "$gdb_prompt $" {fail "vfork parent follow, to bp"}
 112       timeout         {fail "(timeout) vfork parent follow, to bp" }
 113    }
 114    # The child has been detached; allow time for any output it might
 115    # generate to arrive, so that output doesn't get confused with
 116    # any expected debugger output from a subsequent testpoint.
 117    #
 118    exec sleep 1
 119 }
 120
 121 proc vfork_and_exec_child_follow_to_main_bp {} {
 122    global gdb_prompt
 123    global binfile
 124
 125    send_gdb "set follow child\n"
 126    gdb_expect {
 127       -re "$gdb_prompt $" {pass "set follow child, vfork and exec to main bp"}
 128       timeout         {fail "set follow child, vfork and exec to main bp"}
 129    }
 130    send_gdb "continue\n"
 131    gdb_expect {
 132       -re "Detaching from program.*Attaching after fork to.*Executing new program.*Breakpoint.*vforked-prog.c:9.*$gdb_prompt "\
 133                       {pass "vfork and exec child follow, to main bp"}
 134       -re "$gdb_prompt $" {fail "vfork and exec child follow, to main bp"}
 135       timeout         {fail "(timeout) vfork and exec child follow, to main bp" }
 136    }
 137    # The parent has been detached; allow time for any output it might
 138    # generate to arrive, so that output doesn't get confused with
 139    # any gdb_expected debugger output from a subsequent testpoint.
 140    #
 141    exec sleep 1
 142
 143    # Explicitly kill this child, or a subsequent rerun actually runs
 144    # the exec'd child, not the original program...
 145    send_gdb "kill\n"
 146    gdb_expect {
 147       -re ".*Kill the program being debugged.*y or n. $" {
 148          send_gdb "y\n"
 149          send_gdb "file $binfile\n"
 150          gdb_expect {
 151             -re ".*Load new symbol table from.*y or n. $" {
 152                send_gdb "y\n"
 153                gdb_expect {
 154                   -re "Reading symbols from.*$gdb_prompt $" {}
 155                   timeout { fail "loading symbols (timeout)"; return }
 156                }
 157             }
 158             -re ".*gdb_prompt $" {}
 159             timeout { fail "loading symbols (timeout)"; return }
 160           }
 161       }
 162       -re ".*$gdb_prompt $" {}
 163       timeout { fail "killing inferior (timeout)" ; return }
 164     }
 165 }
 166
 167 proc vfork_and_exec_child_follow_through_step {} {
 168    global gdb_prompt
 169    global binfile
 170
 171 # This test cannot be performed prior to HP-UX 10.30, because ptrace-based
 172 # debugging of a vforking program basically doesn't allow the child to do
 173 # things like hit a breakpoint between a vfork and exec.  This means that
 174 # saying "set follow child; next" at a vfork() call won't work, because
 175 # the implementation of "next" sets a "step resume" breakpoint at the
 176 # return from the vfork(), which the child will hit on its way to exec'ing.
 177 #
 178    if { ![istarget "hppa*-*-hpux11.*"] } {
 179       verbose "vfork child-following next test ignored for non-hppa or pre-HP/UX-10.30 targets."
 180       return 0
 181    }
 182
 183    send_gdb "set follow child\n"
 184    gdb_expect {
 185       -re "$gdb_prompt $" {pass "set follow child, vfork and exec through step"}
 186       timeout         {fail "set follow child, vfork and exec through step"}
 187    }
 188    send_gdb "next\n"
 189    gdb_expect {
 190       -re "Detaching from program.*Attaching after fork to.*Executing new program.*Breakpoint.*vforked-prog.c:9.*$gdb_prompt "\
 191                       {pass "vfork and exec child follow, through step"}
 192       -re "$gdb_prompt $" {fail "vfork and exec child follow, through step"}
 193       timeout         {fail "(timeout) vfork and exec child follow, through step" }
 194    }
 195    # The parent has been detached; allow time for any output it might
 196    # generate to arrive, so that output doesn't get confused with
 197    # any expected debugger output from a subsequent testpoint.
 198    #
 199    exec sleep 1
 200
 201    # Explicitly kill this child, or a subsequent rerun actually runs
 202    # the exec'd child, not the original program...
 203    send_gdb "kill\n"
 204    gdb_expect {
 205       -re ".*Kill the program being debugged.*y or n. $" {
 206          send_gdb "y\n"
 207          send_gdb "file $binfile\n"
 208          gdb_expect {
 209             -re ".*Load new symbol table from.*y or n. $" {
 210                send_gdb "y\n"
 211                gdb_expect {
 212                   -re "Reading symbols from.*$gdb_prompt $" {}
 213                   timeout { fail "loading symbols (timeout)"; return }
 214                }
 215             }
 216             -re ".*gdb_prompt $" {}
 217             timeout { fail "loading symbols (timeout)"; return }
 218           }
 219       }
 220       -re ".*$gdb_prompt $" {}
 221       timeout { fail "killing inferior (timeout)" ; return }
 222     }
 223 }
 224
 225 proc tcatch_vfork_then_parent_follow {} {
 226    global gdb_prompt
 227    global srcfile
 228
 229    send_gdb "set follow parent\n"
 230    gdb_expect {
 231       -re "$gdb_prompt $" {pass "set follow parent, tcatch vfork"}
 232       timeout         {fail "set follow parent, tcatch vfork"}
 233    }
 234    send_gdb "tcatch vfork\n"
 235    gdb_expect {
 236       -re "Catchpoint .*(vfork).*$gdb_prompt $"\
 237                       {pass "vfork parent follow, set tcatch vfork"}
 238       -re "$gdb_prompt $" {fail "vfork parent follow, set tcatch vfork"}
 239       timeout         {fail "(timeout) vfork parent follow, set tcatch vfork"}
 240    }
 241    send_gdb "continue\n"
 242 # HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
 243 # stop you in "_vfork".
 244    gdb_expect {
 245       -re "0x\[0-9a-fA-F\]*.*vfork.*$gdb_prompt "\
 246                       {pass "vfork parent follow, tcatch vfork"}
 247       -re "0x\[0-9a-fA-F\]*.*_vfork.*$gdb_prompt "\
 248                       {pass "vfork parent follow, tcatch vfork"}
 249       -re "$gdb_prompt $" {fail "vfork parent follow, tcatch vfork"}
 250       timeout         {fail "(timeout) vfork parent follow, tcatch vfork"}
 251    }
 252    send_gdb "finish\n"
 253    gdb_expect {
 254       -re "Run till exit from.*vfork.*0x\[0-9a-fA-F\]* in main .* at .*${srcfile}:12.*$gdb_prompt "\
 255                       {pass "vfork parent follow, finish after tcatch vfork"}
 256       -re "$gdb_prompt $" {fail "vfork parent follow, finish after tcatch vfork"}
 257       timeout         {fail "(timeout) vfork parent follow, finish after tcatch vfork" }
 258    }
 259    # The child has been detached; allow time for any output it might
 260    # generate to arrive, so that output doesn't get confused with
 261    # any expected debugger output from a subsequent testpoint.
 262    #
 263    exec sleep 1
 264 }
 265
 266 proc tcatch_vfork_then_child_follow {} {
 267    global gdb_prompt
 268    global srcfile2
 269
 270    send_gdb "set follow child\n"
 271    gdb_expect {
 272       -re "$gdb_prompt $" {pass "set follow child, tcatch vfork"}
 273       timeout         {fail "set follow child, tcatch vfork"}
 274    }
 275    send_gdb "tcatch vfork\n"
 276    gdb_expect {
 277       -re "Catchpoint .*(vfork).*$gdb_prompt $"\
 278                       {pass "vfork child follow, set tcatch vfork"}
 279       -re "$gdb_prompt $" {fail "vfork child follow, set tcatch vfork"}
 280       timeout         {fail "(timeout) vfork child follow, set tcatch vfork"}
 281    }
 282    send_gdb "continue\n"
 283 # HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
 284 # stop you in "_vfork".
 285    gdb_expect {
 286       -re "0x\[0-9a-fA-F\]*.*vfork.*$gdb_prompt "\
 287                       {pass "vfork child follow, tcatch vfork"}
 288       -re "0x\[0-9a-fA-F\]*.*_vfork.*$gdb_prompt "\
 289                       {pass "vfork child follow, tcatch vfork"}
 290       -re "$gdb_prompt $" {fail "vfork child follow, tcatch vfork"}
 291       timeout         {fail "(timeout) vfork child follow, tcatch vfork"}
 292    }
 293    send_gdb "finish\n"
 294    gdb_expect {
 295       -re "Run till exit from.*vfork.*${srcfile2}:9.*$gdb_prompt "\
 296                       {pass "vfork child follow, finish after tcatch vfork"}
 297       -re "$gdb_prompt $" {fail "vfork child follow, finish after tcatch vfork"}
 298       timeout         {fail "(timeout) vfork child follow, finish after tcatch vfork" }
 299    }
 300    # The parent has been detached; allow time for any output it might
 301    # generate to arrive, so that output doesn't get confused with
 302    # any expected debugger output from a subsequent testpoint.
 303    #
 304    exec sleep 1
 305 }
 306
 307 proc do_vfork_and_exec_tests {} {
 308    global gdb_prompt
 309
 310    # Try following the parent process by stepping through a call to
 311    # vfork.  Do this without catchpoints.
 312    if [runto_main] then { vfork_parent_follow_through_step }
 313
 314    # Try following the parent process by setting a breakpoint on the
 315    # other side of a vfork, and running to that point.  Do this
 316    # without catchpoints.
 317    if [runto_main] then { vfork_parent_follow_to_bp }
 318
 319    # Try following the child process by just continuing through the
 320    # vfork, and letting the parent's breakpoint on "main" be auto-
 321    # magically reset in the child.
 322    #
 323    if [runto_main] then { vfork_and_exec_child_follow_to_main_bp }
 324
 325    # Try following the child process by stepping through a call to
 326    # vfork.  The child also executes an exec.  Since the child cannot
 327    # be debugged until after it has exec'd, and since there's a bp on
 328    # "main" in the parent, and since the bp's for the parent are
 329    # recomputed in the exec'd child, the step through a vfork should
 330    # land us in the "main" for the exec'd child, too.
 331    #
 332    if [runto_main] then { vfork_and_exec_child_follow_through_step }
 333
 334    # Try catching a vfork, and stepping out to the parent.
 335    #
 336    if [runto_main] then { tcatch_vfork_then_parent_follow }
 337
 338    # Try catching a vfork, and stepping out to the child.
 339    #
 340    if [runto_main] then { tcatch_vfork_then_child_follow }
 341
 342    # Test the ability to follow both child and parent of a vfork.  Do
 343    # this without catchpoints.
 344    # ??rehrauer: NYI.  Will add testpoints here when implemented.
 345    #
 346
 347    # Test the ability to have the debugger ask the user at vfork-time
 348    # whether to follow the parent, child or both.  Do this without
 349    # catchpoints.
 350    # ??rehrauer: NYI.  Will add testpoints here when implemented.
 351    #
 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 or child
 363 # of a Unix vfork() system call.  (The child will subsequently
 364 # call a variant of a Unix exec() system call.)
 365 #
 366 do_vfork_and_exec_tests
 367
 368 set timeout $oldtimeout
 369 return 0