gdb/testsuite/gdb.base/bitfields.exp

   1 # Copyright 1992-2019 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 # This file was written by Fred Fish. (fnf@cygnus.com)
  17
  18
  19 standard_testfile
  20
  21 if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
  22     return -1
  23 }
  24
  25 #
  26 # Test bitfield locating and uniqueness.
  27 # For each member, set that member to 1 and verify that the member (and only
  28 # that member) is 1, then reset it back to 0.
  29 #
  30
  31 proc bitfield_uniqueness {} {
  32     global decimal
  33     global hex
  34     global gdb_prompt
  35     global srcfile
  36
  37     if { ! [runto break1] } {
  38         gdb_suppress_tests
  39     }
  40
  41     if [gdb_test "print flags" ".*uc = 1 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 0.*"] {
  42         gdb_suppress_tests
  43     }
  44     if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #1"] {
  45         gdb_suppress_tests
  46     }
  47     # Note that we check for s1 as either 1 or -1, so that failure to
  48     # treat it correctly as a signed 1bit field (values 0 or -1) while
  49     # printing its value does not cause a spurious failure.  We do the
  50     # signedness preservation test later.
  51     if [gdb_test "print flags" ".*uc = 0 .*, s1 = (1|-1), u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 0.*" "bitfield uniqueness (s1)"] {
  52         gdb_suppress_tests
  53     }
  54     if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #2"] {
  55         gdb_suppress_tests
  56     }
  57     if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 1, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 0.*" "bitfield uniqueness (u1)"] {
  58         gdb_suppress_tests
  59     }
  60     if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #3"] {
  61         gdb_suppress_tests
  62     }
  63     if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 1, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 0.*" "bitfield uniqueness (s2)"] {
  64         gdb_suppress_tests
  65     }
  66     if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #4"] {
  67         gdb_suppress_tests
  68     }
  69     if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 1, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 0.*" "bitfield uniqueness (u2)"] {
  70         gdb_suppress_tests
  71     }
  72     if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #5"] {
  73         gdb_suppress_tests
  74     }
  75     if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 1, u3 = 0, s9 = 0, u9 = 0, sc = 0.*" "bitfield uniqueness (s3)"] {
  76         gdb_suppress_tests
  77     }
  78     if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #6"] {
  79         gdb_suppress_tests
  80     }
  81     if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 1, s9 = 0, u9 = 0, sc = 0.*" "bitfield uniqueness (u3)"] {
  82         gdb_suppress_tests
  83     }
  84     if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #7"] {
  85         gdb_suppress_tests
  86     }
  87     if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 1, u9 = 0, sc = 0.*" "bitfield uniqueness (s9)"] {
  88         gdb_suppress_tests
  89     }
  90     if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #8"] {
  91         gdb_suppress_tests
  92     }
  93     if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 1, sc = 0.*" "bitfield uniqueness (u9)"] {
  94         gdb_suppress_tests
  95     }
  96     if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #9"] {
  97         gdb_suppress_tests
  98     }
  99     if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 1.*" "bitfield uniqueness (sc)"] {
 100         gdb_suppress_tests
 101     }
 102     # Hmmmm?
 103     gdb_stop_suppressing_tests
 104 }
 105
 106
 107 #
 108 # Test bitfield containment.
 109 # Fill alternating fields with all 1's and verify that none of the bits
 110 # "bleed over" to the other fields.
 111 #
 112
 113 proc bitfield_containment {} {
 114     global decimal
 115     global hex
 116     global gdb_prompt
 117     global srcfile
 118
 119     delete_breakpoints
 120
 121     if { ![runto break2] } {
 122         gdb_suppress_tests
 123     }
 124
 125     if [gdb_test "print/x flags" "= {uc = 0xff, s1 = 0x0, u1 = 0x1, s2 = 0x0, u2 = 0x3, s3 = 0x0, u3 = 0x7, s9 = 0x0, u9 = 0x1ff, sc = 0x0}" "bitfield containment #1"] {
 126         gdb_suppress_tests
 127     }
 128
 129     if [gdb_test "cont" "Break.*break2 \\(\\) at .*$srcfile:$decimal.*" "continuing to break2"] {
 130         gdb_suppress_tests
 131     }
 132
 133     # If program is compiled with Sun CC, then these print out as their
 134     # actual sizes; if compiled with gcc, they print out as 0xffffffff
 135     # (which strikes me as bogus, but accept it at least for now).
 136     if [gdb_test "print/x flags" "= {uc = 0x0, s1 = 0x(1|f*), u1 = 0x0, s2 = 0x(3|f*), u2 = 0x0, s3 = 0x(7|f*), u3 = 0x0, s9 = 0x(1ff|f*), u9 = 0x0, sc = 0xff}" "bitfield containment #2"] {
 137         gdb_suppress_tests
 138     }
 139     gdb_stop_suppressing_tests
 140 }
 141
 142 # Test unsigned bitfields for unsignedness and range.
 143 # Fill the unsigned fields with the maximum positive value and verify that
 144 # the values are printed correctly.
 145
 146 proc bitfield_unsignedness {} {
 147     global decimal
 148     global hex
 149     global gdb_prompt
 150     global srcfile
 151
 152     delete_breakpoints
 153
 154     if { ![runto break3] } {
 155         gdb_suppress_tests
 156     }
 157
 158     if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 1, s2 = 0, u2 = 3, s3 = 0, u3 = 7, s9 = 0, u9 = 511, sc = 0.*" "unsigned bitfield ranges"] {
 159         gdb_suppress_tests
 160     }
 161     gdb_stop_suppressing_tests
 162 }
 163
 164 #
 165 # Test signed bitfields for signedness and range.
 166 # Fill the signed fields with the maximum positive value, then the maximally
 167 # negative value, then -1, and verify in each case that the values are
 168 # printed correctly.
 169 #
 170
 171 proc bitfield_signedness {} {
 172     global decimal
 173     global hex
 174     global gdb_prompt
 175     global srcfile
 176
 177     delete_breakpoints
 178
 179     if { ! [runto break4] } {
 180         gdb_suppress_tests
 181     }
 182
 183     if [gdb_test "print flags" "= {uc = 0 .*, s1 = 0, u1 = 0, s2 = 1, u2 = 0, s3 = 3, u3 = 0, s9 = 255, u9 = 0, sc = 0 .*}" "signed bitfields, max positive values"] {
 184         gdb_suppress_tests
 185     }
 186
 187     if [gdb_test "cont" "Break.*break4 \\(\\) at .*$srcfile:$decimal.*" "continuing to break4 #1"] {
 188         gdb_suppress_tests
 189     }
 190
 191     # Determine if the target has signed bitfields so we can xfail the
 192     # the signed bitfield tests if it doesn't.
 193     gdb_test_multiple "print i" "determining signed-ness of bitfields" {
 194         -re ".* = -256.*$gdb_prompt $" {
 195             pass "determining signed-ness of bitfields"
 196         }
 197         -re ".* = 256.*$gdb_prompt $" {
 198             pass "determining signed-ness of bitfields"
 199             setup_xfail "*-*-*"
 200         }
 201         -re ".*$gdb_prompt $" {
 202             fail "determining signed-ness of bitfields"
 203             gdb_suppress_tests
 204         }
 205         default {
 206             fail "determining signed-ness of bitfields"
 207             gdb_suppress_tests
 208         }
 209     }
 210
 211     if [gdb_test "print flags" ".*uc = 0 .*, s1 = -1, u1 = 0, s2 = -2, u2 = 0, s3 = -4, u3 = 0, s9 = -256, u9 = 0, sc = 0.*" "signed bitfields, max negative values"] {
 212         gdb_suppress_tests
 213     }
 214
 215     if [gdb_test "cont" "Break.*break4 \\(\\) at .*$srcfile:$decimal.*" "continuing to break4 #2"] {
 216         gdb_suppress_tests
 217     }
 218
 219     if [gdb_test "print flags" ".*uc = 0 .*, s1 = -1, u1 = 0, s2 = -1, u2 = 0, s3 = -1, u3 = 0, s9 = -1, u9 = 0, sc = 0.*" "signed bitfields with -1"] {
 220         gdb_suppress_tests
 221     }
 222     # Hmmmm???
 223     gdb_stop_suppressing_tests
 224 }
 225
 226 # Test bitfields at non-zero offsets in a struct.
 227
 228 proc bitfield_at_offset {} {
 229     global decimal
 230     global hex
 231     global gdb_prompt
 232     global srcfile
 233
 234     gdb_breakpoint break5
 235     if [gdb_test "cont" "Break.*break5 \\(\\) at .*$srcfile:$decimal.*" "continuing to break5"] {
 236         return
 237     }
 238
 239     set one ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 5, s9 = 0, u9 = 0, sc = 0.*"
 240     set two ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 3, s9 = 0, u9 = 0, sc = 0.*"
 241     gdb_test "print container" "$one$two" "distinct bitfields in container"
 242     gdb_test "print container.one.u3" ".* = 5"
 243     gdb_test "print container.two.u3" ".* = 3"
 244 }
 245
 246 proc bitfield_internalvar {} {
 247     global gdb_prompt
 248
 249     # First, we create an internal var holding an instance of
 250     # the struct (zeroed out).
 251     gdb_test "set \$myvar = (struct internalvartest) \{0\}" "" \
 252       "set internal var"
 253
 254     # Now, we set the proper bits.
 255     gdb_test_no_output "set \$myvar.a = 0"
 256     gdb_test_no_output "set \$myvar.inner.b = 1"
 257     gdb_test_no_output "set \$myvar.inner.deep.c = 0"
 258     gdb_test_no_output "set \$myvar.inner.deep.d = -1"
 259     gdb_test_no_output "set \$myvar.inner.e = 1"
 260     gdb_test_no_output "set \$myvar.f = 1"
 261
 262     # Here comes the true testing.
 263     gdb_test "print \$myvar.a" "\\$\[0-9\]\+ = 0"
 264     gdb_test "print \$myvar.inner.b" "\\$\[0-9\]\+ = 1"
 265     gdb_test "print \$myvar.inner.deep.c" "\\$\[0-9\]\+ = 0"
 266     gdb_test "print \$myvar.inner.deep.d" "\\$\[0-9\]\+ = -1"
 267     gdb_test "print \$myvar.inner.e" "\\$\[0-9\]\+ = -1"
 268     gdb_test "print \$myvar.f" "\\$\[0-9\]\+ = -1"
 269 }
 270
 271 gdb_test_no_output "set print sevenbit-strings"
 272
 273 bitfield_uniqueness
 274 bitfield_containment
 275 bitfield_unsignedness
 276 bitfield_signedness
 277 bitfield_at_offset
 278 bitfield_internalvar