gdb/patches/gdb-6.3-mapping-zero-inode-test.patch

   1 Index: gdb-6.8.50.20090302/gdb/testsuite/gdb.base/gcore-shmid0.exp
   2 ===================================================================
   3 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
   4 +++ gdb-6.8.50.20090302/gdb/testsuite/gdb.base/gcore-shmid0.exp 2009-06-29 16:24:36.000000000 +0200
   5 @@ -0,0 +1,96 @@
   6 +# Copyright 2007, 2009 Free Software Foundation, Inc.
   7 +
   8 +# This program is free software; you can redistribute it and/or modify
   9 +# it under the terms of the GNU General Public License as published by
  10 +# the Free Software Foundation; either version 2 of the License, or
  11 +# (at your option) any later version.
  12 +#
  13 +# This program is distributed in the hope that it will be useful,
  14 +# but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 +# GNU General Public License for more details.
  17 +#
  18 +# You should have received a copy of the GNU General Public License
  19 +# along with this program; if not, write to the Free Software
  20 +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21 +
  22 +# Test GDB's handling of gcore for mapping with a name but zero inode.
  23 +
  24 +if { [prepare_for_testing gcore-shmid0.exp gcore-shmid0] } {
  25 +    return -1
  26 +}
  27 +
  28 +# Does this gdb support gcore?
  29 +set test "help gcore"
  30 +gdb_test_multiple $test $test {
  31 +    -re "Undefined command: .gcore.*$gdb_prompt $" {
  32 +       # gcore command not supported -- nothing to test here.
  33 +       unsupported "gdb does not support gcore on this target"
  34 +       return -1;
  35 +    }
  36 +    -re "Save a core file .*$gdb_prompt $" {
  37 +       pass $test
  38 +    }
  39 +}
  40 +
  41 +if { ! [ runto_main ] } then {
  42 +    untested gcore-shmid0.exp
  43 +    return -1
  44 +}
  45 +
  46 +gdb_breakpoint "initialized"
  47 +gdb_breakpoint "unresolved"
  48 +
  49 +set test "Continue to initialized."
  50 +gdb_test_multiple "continue" $test {
  51 +    -re "Breakpoint .*, initialized .* at .*\r\n$gdb_prompt $" {
  52 +       pass $test
  53 +    }
  54 +    -re "Breakpoint .*, unresolved .* at .*\r\n$gdb_prompt $" {
  55 +       unsupported $test
  56 +       return -1
  57 +    }
  58 +}
  59 +
  60 +set escapedfilename [string_to_regexp ${objdir}/${subdir}/gcore-shmid0.test]
  61 +
  62 +set test "save a corefile"
  63 +gdb_test_multiple "gcore ${objdir}/${subdir}/gcore-shmid0.test" $test {
  64 +    -re "Saved corefile ${escapedfilename}\[\r\n\]+$gdb_prompt $" {
  65 +       pass $test
  66 +    }
  67 +    -re "Can't create a corefile\[\r\n\]+$gdb_prompt $" {
  68 +       unsupported $test
  69 +    }
  70 +}
  71 +
  72 +# Be sure to remove the handle first.
  73 +# But it would get removed even on a kill by GDB as the handle is already
  74 +# deleted, just it is still attached.
  75 +gdb_continue_to_end "finish"
  76 +
  77 +set test "core-file command"
  78 +gdb_test_multiple "core-file $objdir/$subdir/gcore-shmid0.test" $test {
  79 +    -re ".* program is being debugged already.*y or n. $" {
  80 +       # gdb_load may connect us to a gdbserver.
  81 +       send_gdb "y\n"
  82 +       exp_continue;
  83 +    }
  84 +    -re "Core was generated by .*\r\n\#0  .*\\\(\\\).*\r\n$gdb_prompt $" {
  85 +       # The filename does not fit there anyway so do not check it.
  86 +       pass $test
  87 +    }
  88 +    -re ".*registers from core file: File in wrong format.* $" {
  89 +       fail "core-file command (could not read registers from core file)"
  90 +    }
  91 +}
  92 +
  93 +set test "backtrace"
  94 +gdb_test_multiple "bt" $test {
  95 +    -re "#0 *initialized \\\(\\\) at .*#1 .* main \\\(.*$gdb_prompt $" {
  96 +       pass $test
  97 +    }
  98 +    -re "#0 *initialized \\\(\\\) at .*Cannot access memory at address .*$gdb_prompt $" {
  99 +       fail $test
 100 +    }
 101 +}
 102 Index: gdb-6.8.50.20090302/gdb/testsuite/gdb.base/gcore-shmid0.c
 103 ===================================================================
 104 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
 105 +++ gdb-6.8.50.20090302/gdb/testsuite/gdb.base/gcore-shmid0.c   2009-06-29 16:22:49.000000000 +0200
 106 @@ -0,0 +1,123 @@
 107 +/* Copyright 2007, 2009 Free Software Foundation, Inc.
 108 +
 109 +   This file is part of GDB.
 110 +
 111 +   This program is free software; you can redistribute it and/or modify
 112 +   it under the terms of the GNU General Public License as published by
 113 +   the Free Software Foundation; either version 2 of the License, or (at
 114 +   your option) any later version.
 115 +
 116 +   This program is distributed in the hope that it will be useful, but
 117 +   WITHOUT ANY WARRANTY; without even the implied warranty of
 118 +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 119 +   General Public License for more details.
 120 +
 121 +   You should have received a copy of the GNU General Public License
 122 +   along with this program; if not, write to the Free Software
 123 +   Foundation, Inc., 59 Temple Place - Suite 330,
 124 +   Boston, MA 02111-1307, USA.  */
 125 +
 126 +/*
 127 + * Test GDB's handling of gcore for mapping with a name but zero inode.
 128 + */
 129 +
 130 +#include <sys/ipc.h>
 131 +#include <sys/shm.h>
 132 +#include <stdio.h>
 133 +#include <errno.h>
 134 +#include <stdlib.h>
 135 +#include <unistd.h>
 136 +#include <assert.h>
 137 +
 138 +/* The same test running in a parallel testsuite may steal us the zero SID,
 139 +   even if we never get any EEXIST.  Just try a while.  */
 140 +
 141 +#define TIMEOUT_SEC 10
 142 +
 143 +static void
 144 +initialized (void)
 145 +{
 146 +}
 147 +
 148 +static void
 149 +unresolved (void)
 150 +{
 151 +}
 152 +
 153 +int
 154 +main (void)
 155 +{
 156 +  int sid;
 157 +  unsigned int *addr = (void *) -1L;
 158 +  int attempt, round = 0;
 159 +  time_t ts_start, ts;
 160 +
 161 +  if (time (&ts_start) == (time_t) -1)
 162 +    {
 163 +      printf ("time (): %m\n");
 164 +      exit (1);
 165 +    }
 166 +
 167 +  /* The generated SID will cycle with an increment of 32768, attempt until it
 168 +   * wraps to 0.  */
 169 +
 170 +  for (attempt = 0; addr == (void *) -1L; attempt++)
 171 +    {
 172 +      /* kernel-2.6.25-8.fc9.x86_64 just never returns the value 0 by
 173 +        shmget(2).  shmget returns SID range 0..1<<31 in steps of 32768,
 174 +        0x1000 should be enough but wrap the range it to be sure.  */
 175 +
 176 +      if (attempt > 0x21000)
 177 +        {
 178 +         if (time (&ts) == (time_t) -1)
 179 +           {
 180 +             printf ("time (): %m\n");
 181 +             exit (1);
 182 +           }
 183 +
 184 +         if (ts >= ts_start && ts < ts_start + TIMEOUT_SEC)
 185 +           {
 186 +             attempt = 0;
 187 +             round++;
 188 +             continue;
 189 +           }
 190 +
 191 +         printf ("Problem is not reproducible on this kernel (attempt %d, "
 192 +                 "round %d))\n", attempt, round);
 193 +         unresolved ();
 194 +         exit (1);
 195 +       }
 196 +
 197 +      sid = shmget ((key_t) rand (), 0x1000, IPC_CREAT | IPC_EXCL | 0777);
 198 +      if (sid == -1)
 199 +       {
 200 +         if (errno == EEXIST)
 201 +           continue;
 202 +
 203 +         printf ("shmget (%d, 0x1000, IPC_CREAT): errno %d\n", 0, errno);
 204 +         exit (1);
 205 +       }
 206 +
 207 +      /* Use SID only if it is 0, retry it otherwise.  */
 208 +
 209 +      if (sid == 0)
 210 +       {
 211 +         addr = shmat (sid, NULL, SHM_RND);
 212 +         if (addr == (void *) -1L)
 213 +           {
 214 +             printf ("shmat (%d, NULL, SHM_RND): errno %d\n", sid,
 215 +                     errno);
 216 +             exit (1);
 217 +           }
 218 +       }
 219 +      if (shmctl (sid, IPC_RMID, NULL) != 0)
 220 +       {
 221 +         printf ("shmctl (%d, IPC_RMID, NULL): errno %d\n", sid, errno);
 222 +         exit (1);
 223 +       }
 224 +    }
 225 +
 226 +  initialized ();
 227 +
 228 +  return 0;
 229 +}