gnu/dist/gdb6/gdb/testsuite/gdb.base/sizeof.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2
   3 # Copyright 2000, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
   4
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19 if [target_info exists gdb,noinferiorio] {
  20     verbose "Skipping fileio.exp because of no fileio capabilities."
  21     continue
  22 }
  23
  24 if $tracelevel {
  25     strace $tracelevel
  26 }
  27
  28 #
  29 # test running programs
  30 #
  31 set prms_id 0
  32 set bug_id 0
  33
  34 set testfile "sizeof"
  35 set srcfile ${testfile}.c
  36 set binfile ${objdir}/${subdir}/${testfile}
  37 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  38      gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
  39 }
  40
  41 if [get_compiler_info ${binfile}] {
  42     return -1;
  43 }
  44
  45 gdb_exit
  46 gdb_start
  47 gdb_reinitialize_dir $srcdir/$subdir
  48 gdb_load ${binfile}
  49
  50 #
  51 # set it up at a breakpoint so we can play with the variable values
  52 #
  53
  54 if ![runto_main] then {
  55     perror "couldn't run to breakpoint"
  56     continue
  57 }
  58
  59 #
  60 # Query GDB for the size of various types
  61 #
  62
  63 proc get_valueof { fmt exp default } {
  64     global gdb_prompt
  65
  66     set test "get valueof \"${exp}\""
  67     set val ${default}
  68     gdb_test_multiple "print${fmt} ${exp}" "$test" {
  69         -re "\\$\[0-9\]* = (\[-\]*\[0-9\]*).*$gdb_prompt $" {
  70             set val $expect_out(1,string)
  71             pass "$test ($val)"
  72         }
  73     }
  74     return ${val}
  75 }
  76
  77 proc get_sizeof { type default } {
  78     return [get_valueof "/d" "sizeof (${type})" $default]
  79 }
  80
  81 gdb_test "next"
  82
  83 set sizeof_char [get_sizeof "char" 1]
  84 set sizeof_short [get_sizeof "short" 2]
  85 set sizeof_int [get_sizeof "int" 4]
  86 set sizeof_long [get_sizeof "long" 4]
  87 set sizeof_long_long [get_sizeof "long long" 8]
  88
  89 set sizeof_data_ptr [get_sizeof "void *" 4]
  90 set sizeof_func_ptr [get_sizeof "void (*)(void)" 4]
  91
  92 set sizeof_float [get_sizeof "float" 4]
  93 set sizeof_double [get_sizeof "double" 8]
  94 set sizeof_long_double [get_sizeof "long double" 8]
  95
  96 #
  97 # Compare GDB's idea of types with the running program
  98 #
  99
 100 proc check_sizeof { type size } {
 101     global gdb_prompt
 102
 103     set pat [string_to_regexp "sizeof (${type}) == ${size}"]
 104     gdb_test "next" "${pat}\[\r\n\]+\[0-9\].*"  "check sizeof \"$type\""
 105 }
 106
 107 check_sizeof "char" ${sizeof_char}
 108 check_sizeof "short" ${sizeof_short}
 109 check_sizeof "int" ${sizeof_int}
 110 check_sizeof "long" ${sizeof_long}
 111 check_sizeof "long long" ${sizeof_long_long}
 112
 113 check_sizeof "void *" ${sizeof_data_ptr}
 114 check_sizeof "void (*)(void)" ${sizeof_func_ptr}
 115
 116 check_sizeof "float" ${sizeof_float}
 117 check_sizeof "double" ${sizeof_double}
 118 check_sizeof "long double" ${sizeof_long_double}
 119
 120 proc check_valueof { exp val } {
 121     global gdb_prompt
 122
 123     set pat [string_to_regexp "valueof (${exp}) == ${val}"]
 124     gdb_test "next" "${pat}\[\r\n\]+\[0-9\].*" "check valueof \"$exp\""
 125 }
 126
 127 # Check that GDB and the target agree over the sign of a character.
 128
 129 set signof_byte [get_valueof "/d" "'\\377'" -1]
 130 set signof_char [get_valueof "/d" "(int) (char) -1" -1]
 131 set signof_signed_char [get_valueof "/d" "(int) (signed char) -1" -1]
 132 set signof_unsigned_char [get_valueof "/d" "(int) (unsigned char) -1" -1]
 133
 134 check_valueof "'\\377'" ${signof_byte}
 135 check_valueof "(int) (char) -1" ${signof_char}
 136 check_valueof "(int) (signed char) -1" ${signof_signed_char}
 137 check_valueof "(int) (unsigned char) -1" ${signof_unsigned_char}
 138
 139 proc check_padding { fmt type val } {
 140     global gdb_prompt
 141     gdb_test "set padding_${type}.v = ${val}"
 142     gdb_test "print padding_${type}.p1" "= \"The quick brown \""
 143     gdb_test "print${fmt} padding_${type}.v" "= ${val}"
 144     gdb_test "print padding_${type}.p2" "\"The quick brown \".*"
 145 }
 146
 147 # Check that GDB is managing to store a value in a struct field
 148 # without corrupting the fields immediately adjacent to it.
 149
 150 check_padding "/d" "char" 1
 151 check_padding "/d" "short" 2
 152 check_padding "/d" "int" 4
 153 check_padding "/d" "long" 4
 154 check_padding "/d" "long_long" 8
 155
 156 # use multiples of two which can be represented exactly
 157 check_padding "/f" "float" 1
 158 check_padding "/f" "double" 2
 159 check_padding "/f" "long_double" 4
 160
 161 #
 162 # For reference, dump out the entire architecture
 163 #
 164 # The output is very long so use a while loop to consume it
 165 send_gdb "maint print arch\n"
 166 set ok 1
 167 while { $ok } {
 168     gdb_expect {
 169         -re ".*dump" {
 170             #pass "maint print arch $ok"
 171             #set ok [expr $ok + 1]
 172         }
 173         -re "$gdb_prompt $" {
 174             pass "maint print arch"
 175             set ok 0
 176         }
 177         timeout {
 178             fail "maint print arch (timeout)"
 179             set ok 0
 180         }
 181     }
 182 }