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