gdb/testsuite/gdb.base/pointers.exp

   1 # Copyright (C) 1998 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 # This file was written by Elena Zannoni (ezannoni@cygnus.com)
  21
  22 # This file is part of the gdb testsuite
  23 #
  24 # tests for pointer arithmetic and pointer dereferencing
  25 # with integer type variables and pointers to integers
  26 #
  27
  28 if $tracelevel then {
  29         strace $tracelevel
  30         }
  31
  32 #
  33 # test running programs
  34 #
  35 set prms_id 0
  36 set bug_id 0
  37
  38 set testfile "pointers"
  39 set srcfile ${testfile}.c
  40 set binfile ${objdir}/${subdir}/${testfile}
  41
  42 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug additional_flags=-w}] != "" } {
  43      gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
  44     }
  45
  46 if [get_compiler_info ${binfile}] {
  47     return -1;
  48 }
  49
  50 gdb_exit
  51 gdb_start
  52 gdb_reinitialize_dir $srcdir/$subdir
  53 gdb_load ${binfile}
  54
  55
  56 #
  57 # set it up at a breakpoint so we can play with the variable values
  58 #
  59
  60 if ![runto_main] then {
  61     perror "couldn't run to breakpoint"
  62     continue
  63 }
  64
  65 gdb_test "next" "return 0;" "continuing after dummy()"
  66
  67
  68 #
  69 # let's see if gdb catches some illegal operations on pointers
  70 #
  71 # I must comment these out because strict type checking is not
  72 # supported in this version of GDB. I do not really know
  73 # what the expected gdb reply is.
  74 #
  75
  76 #send_gdb "print v_int_pointer2 = &v_int_pointer\n"
  77 #gdb_expect {
  78 #    -re ".*.*$gdb_prompt $" {
  79 #        pass "illegal pointer assignment rejected"
  80 #      }
  81 #    -re ".*$gdb_prompt $" { fail "illegal pointer assignment rejected" }
  82 #    timeout           { fail "(timeout) illegal pointer assignment rejected" }
  83 #  }
  84
  85
  86 #send_gdb "print v_unsigned_int_pointer = &v_int\n"
  87 #gdb_expect {
  88 #    -re ".*.*$gdb_prompt $" {
  89 #        pass "illegal pointer assignment rejected"
  90 #      }
  91 #    -re ".*$gdb_prompt $" { fail "illegal pointer assignment rejected" }
  92 #    timeout           { fail "(timeout) ilegal pointer assignment rejected" }
  93 #  }
  94
  95 #send_gdb "print v_unsigned_int_pointer == v_double_pointer\n"
  96 #gdb_expect {
  97 #    -re ".*.*$gdb_prompt $" {
  98 #        pass "illegal pointer operation (+) rejected"
  99 #      }
 100 #    -re ".*$gdb_prompt $" { fail "illegal pointer operation (+) rejected" }
 101 #    timeout           { fail "(timeout) illegal pointer operation (+) rejected" }
 102 #  }
 103
 104
 105 #send_gdb "print v_unsigned_int_pointer * v_double_pointer\n"
 106 #gdb_expect {
 107 #    -re ".*Argument to arithmetic operation not a number or boolean.*$gdb_prompt $" {
 108 #        pass "illegal pointer operation (*) rejected"
 109 #      }
 110 #    -re ".*$gdb_prompt $" { fail "illegal pointer operation (*) rejected" }
 111 #    timeout           { fail "(timeout) illegal pointer operation (*) rejected" }
 112 #  }
 113
 114
 115 #send_gdb "print v_unsigned_int_pointer = v_double_pointer\n"
 116 #gdb_expect {
 117 #    -re ".*.*$gdb_prompt $" {
 118 #        pass "ilegal pointer assignment rejected"
 119 #      }
 120 #    -re ".*$gdb_prompt $" { fail "illegal pointer assignment rejected" }
 121 #    timeout           { fail "(timeout) illegal pointer assignment rejected" }
 122 #  }
 123
 124
 125 #send_gdb "print v_unsigned_int_pointer = v_unsigned_int\n"
 126 #gdb_expect {
 127 #    -re ".*.*$gdb_prompt $" {
 128 #        pass "illegal pointer assignment rejected"
 129 #      }
 130 #    -re ".*$gdb_prompt $" { fail "illegal pointer assignment rejected" }
 131 #    timeout           { fail "(timeout) illegal pointer assignment rejected" }
 132 #  }
 133
 134 gdb_test "set variable v_int_pointer=&v_int_array\[0\]" "" "set pointer to beginning of array"
 135 gdb_test "set variable v_int_pointer2=&v_int_array\[1\]" "" "set pointer to end of array"
 136
 137
 138 send_gdb "print *v_int_pointer\n"
 139 gdb_expect {
 140     -re ".*= 6.*$gdb_prompt $" {
 141         pass "print object pointed to"
 142       }
 143     -re ".*$gdb_prompt $" { fail "print object pointed to" }
 144     timeout           { fail "(timeout) print object pointed to" }
 145   }
 146
 147 send_gdb "print *v_int_pointer2\n"
 148 gdb_expect {
 149     -re ".*= 18.*$gdb_prompt $" {
 150         pass "print object pointed to"
 151       }
 152     -re ".*$gdb_prompt $" { fail "print object pointed to" }
 153     timeout           { fail "(timeout) print object pointed to" }
 154   }
 155
 156
 157 send_gdb "print v_int_pointer == v_int_pointer2\n"
 158 gdb_expect {
 159     -re ".*= $false.*$gdb_prompt $" {
 160         pass "pointer1==pointer2"
 161       }
 162     -re ".*$gdb_prompt $" { fail "pointer1==pointer2" }
 163     timeout           { fail "(timeout) pointer1==pointer2" }
 164   }
 165
 166 send_gdb "print v_int_pointer != v_int_pointer2\n"
 167 gdb_expect {
 168     -re ".*= $true.*$gdb_prompt $" {
 169         pass "pointer1!=pointer2"
 170       }
 171     -re ".*$gdb_prompt $" { fail "pointer1!=pointer2" }
 172     timeout           { fail "(timeout) pointer1!=pointer2" }
 173   }
 174
 175
 176 send_gdb "print v_int_pointer <= v_int_pointer2\n"
 177 gdb_expect {
 178     -re ".*= $true.*$gdb_prompt $" {
 179         pass "pointer1<=pointer2"
 180       }
 181     -re ".*$gdb_prompt $" { fail "pointer1<=pointer2" }
 182     timeout           { fail "(timeout) pointer1<=pointer2" }
 183   }
 184
 185
 186 send_gdb "print v_int_pointer >= v_int_pointer2\n"
 187 gdb_expect {
 188     -re ".*= $false.*$gdb_prompt $" {
 189         pass "pointer1>=pointer2"
 190       }
 191     -re ".*$gdb_prompt $" { fail "pointer1>=pointer2" }
 192     timeout           { fail "(timeout) pointer1>=pointer2" }
 193   }
 194
 195
 196 send_gdb "print v_int_pointer < v_int_pointer2\n"
 197 gdb_expect {
 198     -re ".*= $true.*$gdb_prompt $" {
 199         pass "pointer1<pointer2"
 200       }
 201     -re ".*$gdb_prompt $" { fail "pointer1<pointer2" }
 202     timeout           { fail "(timeout) pointer1<pointer2" }
 203   }
 204
 205 send_gdb "print v_int_pointer > v_int_pointer2\n"
 206 gdb_expect {
 207     -re ".*= $false.*$gdb_prompt $" {
 208         pass "pointer1>pointer2"
 209       }
 210     -re ".*$gdb_prompt $" { fail "pointer1>pointer2" }
 211     timeout           { fail "(timeout) pointer1>pointer2" }
 212   }
 213
 214
 215 gdb_test "set variable y = *v_int_pointer++" "" "set y = *v_int_pointer++"
 216 send_gdb "print y\n"
 217 gdb_expect {
 218     -re ".*= 6.*$gdb_prompt $" {
 219         send_gdb "print *v_int_pointer\n"
 220         gdb_expect {
 221              -re ".*= 18.*$gdb_prompt $" {
 222                  pass "pointer assignment and increment"
 223                }
 224              -re ".*$gdb_prompt $" { fail "pointer assignment and increment" }
 225              timeout           { fail "(timeout) pointer assignment and increment" }
 226          }
 227          }
 228     -re ".*$gdb_prompt $" { fail "pointer assignment and increment" }
 229     timeout           { fail "(timeout) pointer assignment and increment" }
 230   }
 231
 232
 233
 234
 235 gdb_test "set variable y = *--v_int_pointer2" "" "set y = *--v_int_pointer2"
 236 send_gdb "print y\n"
 237 gdb_expect {
 238     -re ".*= 6.*$gdb_prompt $" {
 239         send_gdb "print *v_int_pointer2\n"
 240         gdb_expect {
 241              -re ".*= 6.*$gdb_prompt $" {
 242                  pass "pointer decrement and assignment"
 243                }
 244              -re ".*$gdb_prompt $" { fail "pointer decrement and assignment" }
 245              timeout           { fail "(timeout) pointer decrement and assignment" }
 246          }
 247          }
 248     -re ".*$gdb_prompt $" { fail "pointer decrement and assignment" }
 249     timeout           { fail "(timeout) pointer decrement and assignment" }
 250   }
 251
 252 gdb_test "set variable y =v_int_pointer-v_int_pointer2" "" "set y =v_int_pointer-v_int_pointer2"
 253 send_gdb "print y\n"
 254 gdb_expect {
 255     -re ".*= 1.*$gdb_prompt $" {
 256         pass "pointer1-pointer2"
 257       }
 258     -re ".*$gdb_prompt $" { fail "pointer1-pointer2" }
 259     timeout           { fail "(timeout) pointer1-pointer2" }
 260   }
 261
 262 gdb_test "set variable v_int_pointer=v_int_array" "" "set v_int_pointer=v_int_array"
 263 send_gdb "print *v_int_pointer\n"
 264 gdb_expect {
 265     -re ".*= 6.*$gdb_prompt $" {
 266         pass "print array element through pointer"
 267       }
 268     -re ".*$gdb_prompt $" { fail "print array element through pointer" }
 269     timeout           { fail "(timeout) print array element through pointer" }
 270   }
 271
 272
 273 send_gdb "print *(v_int_pointer+1)\n"
 274 gdb_expect {
 275     -re ".*= 18.*$gdb_prompt $" {
 276         pass "print array element through pointer"
 277       }
 278     -re ".*$gdb_prompt $" { fail "print array element through pointer" }
 279     timeout           { fail "(timeout) print array element through pointer" }
 280   }
 281
 282 # test print elements of array through pointers
 283
 284 send_gdb "print (*rptr)\[0\]\n"
 285 gdb_expect {
 286     -re ".*= 0.*$gdb_prompt $" {
 287         pass "print array element through pointer"
 288       }
 289     -re ".*$gdb_prompt $" { fail "print array element through pointer" }
 290     timeout           { fail "(timeout) print array element through pointer" }
 291   }
 292
 293 send_gdb "print (*rptr)\[1\]\n"
 294 gdb_expect {
 295     -re ".*= 1.*$gdb_prompt $" {
 296         pass "print array element through pointer"
 297       }
 298     -re ".*$gdb_prompt $" { fail "print array element through pointer" }
 299     timeout           { fail "(timeout) print array element through pointer" }
 300   }
 301
 302
 303 send_gdb "print (*rptr)\[2\]\n"
 304 gdb_expect {
 305     -re ".*= 2.*$gdb_prompt $" {
 306         pass "print array element through pointer"
 307       }
 308     -re ".*$gdb_prompt $" { fail "print array element through pointer" }
 309     timeout           { fail "(timeout) print array element through pointer" }
 310   }
 311
 312 gdb_test "set variable rptr = rptr+1" "" "increment rptr"
 313
 314 send_gdb "print (*rptr)\[0\]\n"
 315 gdb_expect {
 316     -re ".*= 3.*$gdb_prompt $" {
 317         pass "print array element through pointer"
 318       }
 319     -re ".*$gdb_prompt $" { fail "print array element through pointer" }
 320     timeout           { fail "(timeout) print array element through pointer" }
 321   }
 322
 323
 324 send_gdb "print (*rptr)\[1\]\n"
 325 gdb_expect {
 326     -re ".*= 4.*$gdb_prompt $" {
 327         pass "print array element through pointer"
 328       }
 329     -re ".*$gdb_prompt $" { fail "print array element through pointer" }
 330     timeout           { fail "(timeout) print array element through pointer" }
 331   }
 332
 333
 334 send_gdb "print (*rptr)\[2\]\n"
 335 gdb_expect {
 336     -re ".*= 5.*$gdb_prompt $" {
 337         pass "print array element through pointer"
 338       }
 339     -re ".*$gdb_prompt $" { fail "print array element through pointer" }
 340     timeout           { fail "(timeout) print array element through pointer" }
 341   }
 342
 343
 344 send_gdb "print *( *(matrix+1) +2)\n"
 345 gdb_expect {
 346     -re ".*= 5.*$gdb_prompt $" {
 347         pass "print array element w/ pointer arithmetic"
 348       }
 349     -re ".*$gdb_prompt $" { fail "print array element w/ pointer arithemtic" }
 350     timeout           { fail "(timeout) print array element w/ pointer arithmetic" }
 351   }
 352
 353
 354 send_gdb "print **ptr_to_ptr_to_float\n"
 355 gdb_expect {
 356     -re ".*= 100.*$gdb_prompt $" {
 357         pass "print through ptr to ptr"
 358       }
 359     -re ".*$gdb_prompt $" { fail "print through ptr to ptr" }
 360     timeout           { fail "(timeout) print through ptr to ptr" }
 361   }