gdb/testsuite/gdb.base/sizeof.exp

   1 # Copyright 2000, 2002 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 if $tracelevel {
  21     strace $tracelevel
  22 }
  23
  24 #
  25 # test running programs
  26 #
  27 set prms_id 0
  28 set bug_id 0
  29
  30 set testfile "sizeof"
  31 set srcfile ${testfile}.c
  32 set binfile ${objdir}/${subdir}/${testfile}
  33 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  34      gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
  35 }
  36
  37 if [get_compiler_info ${binfile}] {
  38     return -1;
  39 }
  40
  41 gdb_exit
  42 gdb_start
  43 gdb_reinitialize_dir $srcdir/$subdir
  44 gdb_load ${binfile}
  45
  46 #
  47 # set it up at a breakpoint so we can play with the variable values
  48 #
  49
  50 if ![runto_main] then {
  51     perror "couldn't run to breakpoint"
  52     continue
  53 }
  54
  55 #
  56 # Query GDB for the size of various types
  57 #
  58
  59 proc get_valueof { fmt exp default } {
  60     global gdb_prompt
  61     send_gdb "print${fmt} ${exp}\n"
  62     gdb_expect {
  63         -re "\\$\[0-9\]* = (\[-\]*\[0-9\]*).*$gdb_prompt $" {
  64             set val $expect_out(1,string)
  65             pass "get value of ${exp} ($val)"
  66         }
  67         timeout {
  68             set size ${default}
  69             fail "get value of ${exp} (timeout)"
  70         }
  71     }
  72     return ${val}
  73 }
  74
  75 proc get_sizeof { type default } {
  76     return [get_valueof "/d" "sizeof (${type})" $default]
  77 }
  78
  79 gdb_test "next"
  80
  81 set sizeof_char [get_sizeof "char" 1]
  82 set sizeof_short [get_sizeof "short" 2]
  83 set sizeof_int [get_sizeof "int" 4]
  84 set sizeof_long [get_sizeof "long" 4]
  85 set sizeof_long_long [get_sizeof "long long" 8]
  86
  87 set sizeof_data_ptr [get_sizeof "void *" 4]
  88 set sizeof_func_ptr [get_sizeof "void (*)(void)" 4]
  89
  90 set sizeof_float [get_sizeof "float" 4]
  91 set sizeof_double [get_sizeof "double" 8]
  92 set sizeof_long_double [get_sizeof "long double" 8]
  93
  94 #
  95 # Compare GDB's idea of types with the running program
  96 #
  97
  98 proc check_sizeof { type size } {
  99     global gdb_prompt
 100
 101     if [gdb_skip_stdio_test "check sizeof $type == $size"] {
 102         return;
 103     }
 104
 105     set pat [string_to_regexp "sizeof (${type}) == ${size}"]
 106     send_gdb "next\n"
 107     gdb_expect {
 108         -re "${pat}\[\r\n\].*$gdb_prompt $" {
 109             pass "check sizeof ${type} == ${size}"
 110         }
 111         -re ".*$gdb_prompt $" {
 112             fail "check sizeof ${type} == ${size}"
 113         }
 114         timeout {
 115             fail "check sizeof ${type} == ${size} (timeout)"
 116         }
 117     }
 118 }
 119
 120 check_sizeof "char" ${sizeof_char}
 121 check_sizeof "short" ${sizeof_short}
 122 check_sizeof "int" ${sizeof_int}
 123 check_sizeof "long" ${sizeof_long}
 124 check_sizeof "long long" ${sizeof_long_long}
 125
 126 check_sizeof "void *" ${sizeof_data_ptr}
 127 check_sizeof "void (*)(void)" ${sizeof_func_ptr}
 128
 129 check_sizeof "float" ${sizeof_float}
 130 check_sizeof "double" ${sizeof_double}
 131 check_sizeof "long double" ${sizeof_long_double}
 132
 133 proc check_valueof { exp val } {
 134     global gdb_prompt
 135
 136     if [gdb_skip_stdio_test "check valueof $exp == $val"] {
 137         return;
 138     }
 139
 140     set pat [string_to_regexp "valueof (${exp}) == ${val}"]
 141     send_gdb "next\n"
 142     gdb_expect {
 143         -re "${pat}\[\r\n\].*$gdb_prompt $" {
 144             pass "check valueof ${exp} == ${val}"
 145         }
 146         -re ".*$gdb_prompt $" {
 147             fail "check valueof ${exp} == ${val}"
 148         }
 149         timeout {
 150             fail "check valueof ${exp} == ${val} (timeout)"
 151         }
 152     }
 153 }
 154
 155 # Check that GDB and the target agree over the sign of a character.
 156
 157 set signof_char [get_valueof "/d" "(int) (char) -1" -1]
 158 set signof_signed_char [get_valueof "/d" "(int) (signed char) -1" -1]
 159 set signof_unsigned_char [get_valueof "/d" "(int) (unsigned char) -1" -1]
 160
 161 check_valueof "(int) (char) -1" ${signof_char}
 162 check_valueof "(int) (signed char) -1" ${signof_signed_char}
 163 check_valueof "(int) (unsigned char) -1" ${signof_unsigned_char}
 164
 165 proc check_padding { fmt type val } {
 166     global gdb_prompt
 167     gdb_test "set padding_${type}.v = ${val}"
 168     gdb_test "print padding_${type}.p1" "= \"The quick brown \""
 169     gdb_test "print${fmt} padding_${type}.v" "= ${val}"
 170     gdb_test "print padding_${type}.p2" "\"The quick brown \".*"
 171 }
 172
 173 # Check that GDB is managing to store a value in a struct field
 174 # without corrupting the fields immediately adjacent to it.
 175
 176 check_padding "/d" "char" 1
 177 check_padding "/d" "short" 2
 178 check_padding "/d" "int" 4
 179 check_padding "/d" "long" 4
 180 check_padding "/d" "long_long" 8
 181
 182 # use multiples of two which can be represented exactly
 183 check_padding "/f" "float" 1
 184 check_padding "/f" "double" 2
 185 check_padding "/f" "long_double" 4
 186
 187 #
 188 # For reference, dump out the entire architecture
 189 #
 190 # The output is very long so use a while loop to consume it
 191 send_gdb "maint print arch\n"
 192 set ok 1
 193 while { $ok } {
 194     gdb_expect {
 195         -re ".*dump" {
 196             #pass "maint print arch $ok"
 197             #set ok [expr $ok + 1]
 198         }
 199         -re "$gdb_prompt $" {
 200             pass "maint print arch"
 201             set ok 0
 202         }
 203         timeout {
 204             fail "maint print arch (timeout)"
 205             set ok 0
 206         }
 207     }
 208 }