gdb/testsuite/gdb.base/sizeof.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2
   3 # Copyright 2000-2013 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 3 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, see <http://www.gnu.org/licenses/>.
  17
  18 if [target_info exists gdb,noinferiorio] {
  19     verbose "Skipping sizeof.exp because of no fileio capabilities."
  20     continue
  21 }
  22
  23 #
  24 # test running programs
  25 #
  26
  27 set testfile "sizeof"
  28 set srcfile ${testfile}.c
  29 set binfile ${objdir}/${subdir}/${testfile}
  30 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  31      untested sizeof.exp
  32      return -1
  33 }
  34
  35 if [get_compiler_info] {
  36     return -1;
  37 }
  38
  39 gdb_exit
  40 gdb_start
  41 gdb_reinitialize_dir $srcdir/$subdir
  42 gdb_load ${binfile}
  43
  44 #
  45 # set it up at a breakpoint so we can play with the variable values
  46 #
  47
  48 if ![runto_main] then {
  49     perror "couldn't run to breakpoint"
  50     continue
  51 }
  52
  53 #
  54 # Query GDB for the size of various types
  55 #
  56
  57 gdb_test "next"
  58
  59 set sizeof_char [get_sizeof "char" 1]
  60 set sizeof_short [get_sizeof "short" 2]
  61 set sizeof_int [get_sizeof "int" 4]
  62 set sizeof_long [get_sizeof "long" 4]
  63 set sizeof_long_long [get_sizeof "long long" 8]
  64
  65 set sizeof_data_ptr [get_sizeof "void *" 4]
  66 set sizeof_func_ptr [get_sizeof "void (*)(void)" 4]
  67
  68 set sizeof_float [get_sizeof "float" 4]
  69 set sizeof_double [get_sizeof "double" 8]
  70 set sizeof_long_double [get_sizeof "long double" 8]
  71
  72 #
  73 # Compare GDB's idea of types with the running program
  74 #
  75
  76 proc check_sizeof { type size } {
  77     global gdb_prompt
  78
  79     set pat [string_to_regexp "sizeof (${type}) == ${size}"]
  80     gdb_test "next" "${pat}\[\r\n\]+\[0-9\].*"  "check sizeof \"$type\""
  81 }
  82
  83 check_sizeof "char" ${sizeof_char}
  84 check_sizeof "short" ${sizeof_short}
  85 check_sizeof "int" ${sizeof_int}
  86 check_sizeof "long" ${sizeof_long}
  87 check_sizeof "long long" ${sizeof_long_long}
  88
  89 check_sizeof "void *" ${sizeof_data_ptr}
  90 check_sizeof "void (*)(void)" ${sizeof_func_ptr}
  91
  92 check_sizeof "float" ${sizeof_float}
  93 check_sizeof "double" ${sizeof_double}
  94 check_sizeof "long double" ${sizeof_long_double}
  95
  96 proc check_valueof { exp val } {
  97     global gdb_prompt
  98
  99     set pat [string_to_regexp "valueof (${exp}) == ${val}"]
 100     gdb_test "next" "${pat}\[\r\n\]+\[0-9\].*" "check valueof \"$exp\""
 101 }
 102
 103 # Check that GDB and the target agree over the sign of a character.
 104
 105 set signof_byte [get_integer_valueof "'\\377'" -1]
 106 set signof_char [get_integer_valueof "(int) (char) -1" -1]
 107 set signof_signed_char [get_integer_valueof "(int) (signed char) -1" -1]
 108 set signof_unsigned_char [get_integer_valueof "(int) (unsigned char) -1" -1]
 109
 110 check_valueof "'\\377'" ${signof_byte}
 111 check_valueof "(int) (char) -1" ${signof_char}
 112 check_valueof "(int) (signed char) -1" ${signof_signed_char}
 113 check_valueof "(int) (unsigned char) -1" ${signof_unsigned_char}
 114
 115 proc check_padding { fmt type val } {
 116     global gdb_prompt
 117     gdb_test_no_output "set padding_${type}.v = ${val}"
 118     gdb_test "print padding_${type}.p1" "= \"The quick brown \""
 119     gdb_test "print${fmt} padding_${type}.v" "= ${val}"
 120     gdb_test "print padding_${type}.p2" "\"The quick brown \".*"
 121 }
 122
 123 # Check that GDB is managing to store a value in a struct field
 124 # without corrupting the fields immediately adjacent to it.
 125
 126 check_padding "/d" "char" 1
 127 check_padding "/d" "short" 2
 128 check_padding "/d" "int" 4
 129 check_padding "/d" "long" 4
 130 check_padding "/d" "long_long" 8
 131
 132 # use multiples of two which can be represented exactly
 133 check_padding "/f" "float" 1
 134 check_padding "/f" "double" 2
 135 check_padding "/f" "long_double" 4
 136
 137 #
 138 # For reference, dump out the entire architecture
 139 #
 140 # The output is very long so use a while loop to consume it
 141 send_gdb "maint print arch\n"
 142 set ok 1
 143 while { $ok } {
 144     gdb_expect {
 145         -re ".*dump" {
 146             #pass "maint print arch $ok"
 147             #set ok [expr $ok + 1]
 148         }
 149         -re "$gdb_prompt $" {
 150             pass "maint print arch"
 151             set ok 0
 152         }
 153         timeout {
 154             fail "maint print arch (timeout)"
 155             set ok 0
 156         }
 157     }
 158 }