gdb/testsuite/gdb.base/sizeof.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2
   3 # Copyright 2000, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
   4 # Free Software Foundation, Inc.
   5
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  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
  32 set testfile "sizeof"
  33 set srcfile ${testfile}.c
  34 set binfile ${objdir}/${subdir}/${testfile}
  35 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  36      untested sizeof.exp
  37      return -1
  38 }
  39
  40 if [get_compiler_info ${binfile}] {
  41     return -1;
  42 }
  43
  44 gdb_exit
  45 gdb_start
  46 gdb_reinitialize_dir $srcdir/$subdir
  47 gdb_load ${binfile}
  48
  49 #
  50 # set it up at a breakpoint so we can play with the variable values
  51 #
  52
  53 if ![runto_main] then {
  54     perror "couldn't run to breakpoint"
  55     continue
  56 }
  57
  58 #
  59 # Query GDB for the size of various types
  60 #
  61
  62 gdb_test "next"
  63
  64 set sizeof_char [get_sizeof "char" 1]
  65 set sizeof_short [get_sizeof "short" 2]
  66 set sizeof_int [get_sizeof "int" 4]
  67 set sizeof_long [get_sizeof "long" 4]
  68 set sizeof_long_long [get_sizeof "long long" 8]
  69
  70 set sizeof_data_ptr [get_sizeof "void *" 4]
  71 set sizeof_func_ptr [get_sizeof "void (*)(void)" 4]
  72
  73 set sizeof_float [get_sizeof "float" 4]
  74 set sizeof_double [get_sizeof "double" 8]
  75 set sizeof_long_double [get_sizeof "long double" 8]
  76
  77 #
  78 # Compare GDB's idea of types with the running program
  79 #
  80
  81 proc check_sizeof { type size } {
  82     global gdb_prompt
  83
  84     set pat [string_to_regexp "sizeof (${type}) == ${size}"]
  85     gdb_test "next" "${pat}\[\r\n\]+\[0-9\].*"  "check sizeof \"$type\""
  86 }
  87
  88 check_sizeof "char" ${sizeof_char}
  89 check_sizeof "short" ${sizeof_short}
  90 check_sizeof "int" ${sizeof_int}
  91 check_sizeof "long" ${sizeof_long}
  92 check_sizeof "long long" ${sizeof_long_long}
  93
  94 check_sizeof "void *" ${sizeof_data_ptr}
  95 check_sizeof "void (*)(void)" ${sizeof_func_ptr}
  96
  97 check_sizeof "float" ${sizeof_float}
  98 check_sizeof "double" ${sizeof_double}
  99 check_sizeof "long double" ${sizeof_long_double}
 100
 101 proc check_valueof { exp val } {
 102     global gdb_prompt
 103
 104     set pat [string_to_regexp "valueof (${exp}) == ${val}"]
 105     gdb_test "next" "${pat}\[\r\n\]+\[0-9\].*" "check valueof \"$exp\""
 106 }
 107
 108 # Check that GDB and the target agree over the sign of a character.
 109
 110 set signof_byte [get_integer_valueof "'\\377'" -1]
 111 set signof_char [get_integer_valueof "(int) (char) -1" -1]
 112 set signof_signed_char [get_integer_valueof "(int) (signed char) -1" -1]
 113 set signof_unsigned_char [get_integer_valueof "(int) (unsigned char) -1" -1]
 114
 115 check_valueof "'\\377'" ${signof_byte}
 116 check_valueof "(int) (char) -1" ${signof_char}
 117 check_valueof "(int) (signed char) -1" ${signof_signed_char}
 118 check_valueof "(int) (unsigned char) -1" ${signof_unsigned_char}
 119
 120 proc check_padding { fmt type val } {
 121     global gdb_prompt
 122     gdb_test_no_output "set padding_${type}.v = ${val}"
 123     gdb_test "print padding_${type}.p1" "= \"The quick brown \""
 124     gdb_test "print${fmt} padding_${type}.v" "= ${val}"
 125     gdb_test "print padding_${type}.p2" "\"The quick brown \".*"
 126 }
 127
 128 # Check that GDB is managing to store a value in a struct field
 129 # without corrupting the fields immediately adjacent to it.
 130
 131 check_padding "/d" "char" 1
 132 check_padding "/d" "short" 2
 133 check_padding "/d" "int" 4
 134 check_padding "/d" "long" 4
 135 check_padding "/d" "long_long" 8
 136
 137 # use multiples of two which can be represented exactly
 138 check_padding "/f" "float" 1
 139 check_padding "/f" "double" 2
 140 check_padding "/f" "long_double" 4
 141
 142 #
 143 # For reference, dump out the entire architecture
 144 #
 145 # The output is very long so use a while loop to consume it
 146 send_gdb "maint print arch\n"
 147 set ok 1
 148 while { $ok } {
 149     gdb_expect {
 150         -re ".*dump" {
 151             #pass "maint print arch $ok"
 152             #set ok [expr $ok + 1]
 153         }
 154         -re "$gdb_prompt $" {
 155             pass "maint print arch"
 156             set ok 0
 157         }
 158         timeout {
 159             fail "maint print arch (timeout)"
 160             set ok 0
 161         }
 162     }
 163 }