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

   1 #   Copyright 1997, 1999, 2007, 2008, 2009 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 3 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, see <http://www.gnu.org/licenses/>.
  15
  16 if { [is_remote target] || ![isnative] } then {
  17     continue
  18 }
  19
  20 set prms_id 0
  21 set bug_id 0
  22
  23 # NOTE drow/2002-12-06: I don't know what the referenced kernel problem
  24 # is, but it appears to be fixed in recent HP/UX versions.
  25
  26 ##if [istarget "hppa2.0w-hp-hpux*"] {
  27 ##  warning "Don't run gdb.base/foll-vfork.exp until JAGaa43495 kernel problem is fixed."
  28 ##  return 0
  29 ##}
  30
  31 global srcfile
  32 set testfile "foll-vfork"
  33 set testfile2 "vforked-prog"
  34 set srcfile ${testfile}.c
  35 set srcfile2 ${testfile2}.c
  36 set binfile ${objdir}/${subdir}/${testfile}
  37 set binfile2 ${objdir}/${subdir}/${testfile2}
  38
  39 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  40      untested foll-vfork.exp
  41      return -1
  42 }
  43
  44 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable {debug}] != "" } {
  45      untested foll-vfork.exp
  46      return -1
  47 }
  48
  49
  50 # Until "set follow-fork-mode" and "catch vfork" are implemented on
  51 # other targets...
  52 #
  53 if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then {
  54     continue
  55 }
  56
  57 # Test to see if we are on an HP-UX 10.20 and if so,
  58 # do not run these tests as catching vfork is disabled for
  59 # 10.20.
  60
  61 if [istarget "hppa*-hp-hpux10.20"] then {
  62     return 0
  63 }
  64
  65 # A few of these tests require a little more time than the standard
  66 # timeout allows.
  67 set oldtimeout $timeout
  68 set timeout [expr "$timeout + 10"]
  69
  70 proc check_vfork_catchpoints {} {
  71   global gdb_prompt
  72   global has_vfork_catchpoints
  73
  74   # Verify that the system supports "catch vfork".
  75   gdb_test "catch vfork" "Catchpoint \[0-9\]* \\(vfork\\)" "insert first vfork catchpoint"
  76   set has_vfork_catchpoints 0
  77   gdb_test_multiple "continue" "continue to first vfork catchpoint" {
  78     -re ".*Your system does not support vfork catchpoints.*$gdb_prompt $" {
  79       unsupported "continue to first vfork catchpoint"
  80     }
  81     -re ".*Catchpoint.*$gdb_prompt $" {
  82       set has_vfork_catchpoints 1
  83       pass "continue to first vfork catchpoint"
  84     }
  85   }
  86
  87   if {$has_vfork_catchpoints == 0} {
  88     unsupported "vfork catchpoints"
  89     return -code return
  90   }
  91 }
  92
  93 proc vfork_parent_follow_through_step {} {
  94    global gdb_prompt
  95
  96    send_gdb "set follow parent\n"
  97    gdb_expect {
  98       -re "$gdb_prompt $" {pass "set follow parent, vfork through step"}
  99       timeout         {fail "set follow parent, vfork through step"}
 100    }
 101    send_gdb "next\n"
 102    gdb_expect {
 103       -re "Detaching after fork from.*13.*$gdb_prompt "\
 104                       {pass "vfork parent follow, through step"}
 105       -re "$gdb_prompt $" {fail "vfork parent follow, through step"}
 106       timeout         {fail "(timeout) vfork parent follow, through step" }
 107    }
 108    # The child has been detached; allow time for any output it might
 109    # generate to arrive, so that output doesn't get confused with
 110    # any gdb_expected debugger output from a subsequent testpoint.
 111    #
 112    exec sleep 1
 113 }
 114
 115 proc vfork_parent_follow_to_bp {} {
 116    global gdb_prompt
 117    global srcfile
 118
 119    send_gdb "set follow parent\n"
 120    gdb_expect {
 121       -re "$gdb_prompt $" {pass "set follow parent, vfork to bp"}
 122       timeout         {fail "set follow parent, vfork to bp"}
 123    }
 124    send_gdb "break ${srcfile}:18\n"
 125    gdb_expect {
 126       -re "$gdb_prompt $" {pass "break, vfork to bp"}
 127       timeout         {fail "break, vfork to bp"}
 128    }
 129    send_gdb "continue\n"
 130    gdb_expect {
 131       -re ".*Detaching after fork from child process.*Breakpoint.*18.*$gdb_prompt "\
 132                       {pass "vfork parent follow, to bp"}
 133       -re "$gdb_prompt $" {fail "vfork parent follow, to bp"}
 134       timeout         {fail "(timeout) vfork parent follow, to bp" }
 135    }
 136    # The child has been detached; allow time for any output it might
 137    # generate to arrive, so that output doesn't get confused with
 138    # any expected debugger output from a subsequent testpoint.
 139    #
 140    exec sleep 1
 141 }
 142
 143 proc vfork_and_exec_child_follow_to_main_bp {} {
 144    global gdb_prompt
 145    global binfile
 146
 147    send_gdb "set follow child\n"
 148    gdb_expect {
 149       -re "$gdb_prompt $" {pass "set follow child, vfork and exec to main bp"}
 150       timeout         {fail "set follow child, vfork and exec to main bp"}
 151    }
 152    send_gdb "continue\n"
 153    gdb_expect {
 154       -re "Attaching after fork to.*Executing new program.*Breakpoint.*vforked-prog.c:9.*$gdb_prompt "\
 155                       {pass "vfork and exec child follow, to main bp"}
 156       -re "$gdb_prompt $" {fail "vfork and exec child follow, to main bp"}
 157       timeout         {fail "(timeout) vfork and exec child follow, to main bp" }
 158    }
 159    # The parent has been detached; allow time for any output it might
 160    # generate to arrive, so that output doesn't get confused with
 161    # any gdb_expected debugger output from a subsequent testpoint.
 162    #
 163    exec sleep 1
 164
 165    # Explicitly kill this child, or a subsequent rerun actually runs
 166    # the exec'd child, not the original program...
 167    send_gdb "kill\n"
 168    gdb_expect {
 169       -re ".*Kill the program being debugged.*y or n. $" {
 170          send_gdb "y\n"
 171          send_gdb "file $binfile\n"
 172          gdb_expect {
 173             -re ".*Load new symbol table from.*y or n. $" {
 174                send_gdb "y\n"
 175                gdb_expect {
 176                   -re "Reading symbols from.*$gdb_prompt $" {}
 177                   timeout { fail "loading symbols (timeout)"; return }
 178                }
 179             }
 180             -re ".*gdb_prompt $" {}
 181             timeout { fail "loading symbols (timeout)"; return }
 182           }
 183       }
 184       -re ".*$gdb_prompt $" {}
 185       timeout { fail "killing inferior (timeout)" ; return }
 186     }
 187 }
 188
 189 proc vfork_and_exec_child_follow_through_step {} {
 190    global gdb_prompt
 191    global binfile
 192
 193 # This test cannot be performed prior to HP-UX 10.30, because ptrace-based
 194 # debugging of a vforking program basically doesn't allow the child to do
 195 # things like hit a breakpoint between a vfork and exec.  This means that
 196 # saying "set follow child; next" at a vfork() call won't work, because
 197 # the implementation of "next" sets a "step resume" breakpoint at the
 198 # return from the vfork(), which the child will hit on its way to exec'ing.
 199 #
 200    if { ![istarget "hppa*-*-hpux11.*"] } {
 201       verbose "vfork child-following next test ignored for non-hppa or pre-HP/UX-10.30 targets."
 202       return 0
 203    }
 204
 205    send_gdb "set follow child\n"
 206    gdb_expect {
 207       -re "$gdb_prompt $" {pass "set follow child, vfork and exec through step"}
 208       timeout         {fail "set follow child, vfork and exec through step"}
 209    }
 210    send_gdb "next\n"
 211    gdb_expect {
 212       -re "Attaching after fork to.*Executing new program.*Breakpoint.*vforked-prog.c:9.*$gdb_prompt "\
 213                       {pass "vfork and exec child follow, through step"}
 214       -re "$gdb_prompt $" {fail "vfork and exec child follow, through step"}
 215       timeout         {fail "(timeout) vfork and exec child follow, through step" }
 216    }
 217    # The parent has been detached; allow time for any output it might
 218    # generate to arrive, so that output doesn't get confused with
 219    # any expected debugger output from a subsequent testpoint.
 220    #
 221    exec sleep 1
 222
 223    # Explicitly kill this child, or a subsequent rerun actually runs
 224    # the exec'd child, not the original program...
 225    send_gdb "kill\n"
 226    gdb_expect {
 227       -re ".*Kill the program being debugged.*y or n. $" {
 228          send_gdb "y\n"
 229          send_gdb "file $binfile\n"
 230          gdb_expect {
 231             -re ".*Load new symbol table from.*y or n. $" {
 232                send_gdb "y\n"
 233                gdb_expect {
 234                   -re "Reading symbols from.*$gdb_prompt $" {}
 235                   timeout { fail "loading symbols (timeout)"; return }
 236                }
 237             }
 238             -re ".*gdb_prompt $" {}
 239             timeout { fail "loading symbols (timeout)"; return }
 240           }
 241       }
 242       -re ".*$gdb_prompt $" {}
 243       timeout { fail "killing inferior (timeout)" ; return }
 244     }
 245 }
 246
 247 proc tcatch_vfork_then_parent_follow {} {
 248    global gdb_prompt
 249    global srcfile
 250
 251    send_gdb "set follow parent\n"
 252    gdb_expect {
 253       -re "$gdb_prompt $" {pass "set follow parent, tcatch vfork"}
 254       timeout         {fail "set follow parent, tcatch vfork"}
 255    }
 256    send_gdb "tcatch vfork\n"
 257    gdb_expect {
 258       -re "Catchpoint .*(vfork).*$gdb_prompt $"\
 259                       {pass "vfork parent follow, set tcatch vfork"}
 260       -re "$gdb_prompt $" {fail "vfork parent follow, set tcatch vfork"}
 261       timeout         {fail "(timeout) vfork parent follow, set tcatch vfork"}
 262    }
 263    send_gdb "continue\n"
 264 # HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
 265 # stop you in "_vfork".
 266    gdb_expect {
 267       -re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt "\
 268                       {pass "vfork parent follow, tcatch vfork"}
 269       -re "vfork \\(\\) at.*$gdb_prompt "\
 270                       {pass "vfork parent follow, tcatch vfork"}
 271       -re "$gdb_prompt $" {fail "vfork parent follow, tcatch vfork"}
 272       timeout         {fail "(timeout) vfork parent follow, tcatch vfork"}
 273    }
 274    send_gdb "finish\n"
 275    gdb_expect {
 276       -re "Run till exit from.*vfork.*0x\[0-9a-fA-F\]* in main .* at .*${srcfile}:12.*$gdb_prompt "\
 277                       {pass "vfork parent follow, finish after tcatch vfork"}
 278       -re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
 279           send_gdb "finish\n"
 280           exp_continue
 281       }
 282       -re "$gdb_prompt $" {fail "vfork parent follow, finish after tcatch vfork"}
 283       timeout         {fail "(timeout) vfork parent follow, finish after tcatch vfork" }
 284    }
 285    # The child has been detached; allow time for any output it might
 286    # generate to arrive, so that output doesn't get confused with
 287    # any expected debugger output from a subsequent testpoint.
 288    #
 289    exec sleep 1
 290 }
 291
 292 proc tcatch_vfork_then_child_follow {} {
 293    global gdb_prompt
 294    global srcfile
 295    global srcfile2
 296
 297    send_gdb "set follow child\n"
 298    gdb_expect {
 299       -re "$gdb_prompt $" {pass "set follow child, tcatch vfork"}
 300       timeout         {fail "set follow child, tcatch vfork"}
 301    }
 302    send_gdb "tcatch vfork\n"
 303    gdb_expect {
 304       -re "Catchpoint .*(vfork).*$gdb_prompt $"\
 305                       {pass "vfork child follow, set tcatch vfork"}
 306       -re "$gdb_prompt $" {fail "vfork child follow, set tcatch vfork"}
 307       timeout         {fail "(timeout) vfork child follow, set tcatch vfork"}
 308    }
 309    send_gdb "continue\n"
 310 # HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
 311 # stop you in "_vfork".
 312    gdb_expect {
 313       -re "vfork \\(\\) at .*$gdb_prompt $"\
 314                       {pass "vfork child follow, tcatch vfork"}
 315       -re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt "\
 316                       {pass "vfork child follow, tcatch vfork"}
 317       -re "$gdb_prompt $" {fail "vfork child follow, tcatch vfork"}
 318       timeout         {fail "(timeout) vfork child follow, tcatch vfork"}
 319    }
 320    send_gdb "finish\n"
 321    gdb_expect {
 322       -re "Run till exit from.*vfork.*${srcfile}:12.*$gdb_prompt "\
 323                       {pass "vfork child follow, finish after tcatch vfork"}
 324       -re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
 325           send_gdb "finish\n"
 326           exp_continue
 327       }
 328       -re "Run till exit from.*vfork.*${srcfile2}:9.*$gdb_prompt "\
 329                       {pass "vfork child follow, finish after tcatch vfork (followed exec)"}
 330       -re "$gdb_prompt $" {fail "vfork child follow, finish after tcatch vfork"}
 331       timeout         {fail "(timeout) vfork child follow, finish after tcatch vfork" }
 332    }
 333    # The parent has been detached; allow time for any output it might
 334    # generate to arrive, so that output doesn't get confused with
 335    # any expected debugger output from a subsequent testpoint.
 336    #
 337    exec sleep 1
 338 }
 339
 340 proc do_vfork_and_exec_tests {} {
 341    global gdb_prompt
 342
 343    # Check that vfork catchpoints are supported, as an indicator for whether
 344    # vfork-following is supported.
 345    if [runto_main] then { check_vfork_catchpoints }
 346
 347    # Try following the parent process by stepping through a call to
 348    # vfork.  Do this without catchpoints.
 349    if [runto_main] then { vfork_parent_follow_through_step }
 350
 351    # Try following the parent process by setting a breakpoint on the
 352    # other side of a vfork, and running to that point.  Do this
 353    # without catchpoints.
 354    if [runto_main] then { vfork_parent_follow_to_bp }
 355
 356    # Try following the child process by just continuing through the
 357    # vfork, and letting the parent's breakpoint on "main" be auto-
 358    # magically reset in the child.
 359    #
 360    if [runto_main] then { vfork_and_exec_child_follow_to_main_bp }
 361
 362    # Try following the child process by stepping through a call to
 363    # vfork.  The child also executes an exec.  Since the child cannot
 364    # be debugged until after it has exec'd, and since there's a bp on
 365    # "main" in the parent, and since the bp's for the parent are
 366    # recomputed in the exec'd child, the step through a vfork should
 367    # land us in the "main" for the exec'd child, too.
 368    #
 369    if [runto_main] then { vfork_and_exec_child_follow_through_step }
 370
 371    # Try catching a vfork, and stepping out to the parent.
 372    #
 373    if [runto_main] then { tcatch_vfork_then_parent_follow }
 374
 375    # Try catching a vfork, and stepping out to the child.
 376    #
 377    if [runto_main] then { tcatch_vfork_then_child_follow }
 378
 379    # Test the ability to follow both child and parent of a vfork.  Do
 380    # this without catchpoints.
 381    # ??rehrauer: NYI.  Will add testpoints here when implemented.
 382    #
 383
 384    # Test the ability to have the debugger ask the user at vfork-time
 385    # whether to follow the parent, child or both.  Do this without
 386    # catchpoints.
 387    # ??rehrauer: NYI.  Will add testpoints here when implemented.
 388    #
 389 }
 390
 391 # Start with a fresh gdb
 392
 393 gdb_exit
 394 gdb_start
 395 gdb_reinitialize_dir $srcdir/$subdir
 396 gdb_load ${binfile}
 397
 398 # The "Detaching..." and "Attaching..." messages may be hidden by
 399 # default.
 400 gdb_test "set verbose" ""
 401
 402 # This is a test of gdb's ability to follow the parent or child
 403 # of a Unix vfork() system call.  (The child will subsequently
 404 # call a variant of a Unix exec() system call.)
 405 #
 406 do_vfork_and_exec_tests
 407
 408 set timeout $oldtimeout
 409 return 0