gdb/testsuite/gdb.base/code_elim.exp

   1 # Copyright 2002-2017 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 # code_elim.exp -- tests that GDB can handle executables where some data/code
  17 #                  has been eliminated by the linker.
  18
  19 set testfile1 code_elim1
  20 set testfile2 code_elim2
  21 set srcfile1 ${testfile1}.c
  22 set srcfile2 ${testfile2}.c
  23 set binfile1 [standard_output_file ${testfile1}]
  24 set binfile2 [standard_output_file ${testfile2}]
  25 set opts [list debug]
  26 lappend opts "additional_flags=-ffunction-sections"
  27 lappend opts "additional_flags=-fdata-sections"
  28 lappend opts "additional_flags=-Wl,-gc-sections"
  29 lappend opts "additional_flags=-Wl,-e,main"
  30
  31 remote_exec build "rm -f ${binfile1}"
  32 remote_exec build "rm -f ${binfile2}"
  33
  34 if { [gdb_compile "${srcdir}/${subdir}/${srcfile1}" "${binfile1}" executable $opts] != "" } {
  35      untested "failed to compile"
  36      return -1
  37 }
  38
  39 if { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable $opts] != "" } {
  40      untested "failed to compile"
  41      return -1
  42 }
  43
  44 proc not_null_var_address { var } {
  45
  46     # Same as get_var_address, expect that it reports a failure if a null
  47     # address is returned by gdb.
  48
  49     set address [get_var_address $var]
  50     regexp "0x\[0-9a-fA-F\]+" $address address
  51     if { "$address" == "0x0" } {
  52         fail "$var has null address"
  53     }
  54 }
  55
  56 proc test_eliminated_var { var } {
  57     global gdb_prompt hex
  58
  59     # Match output 'No symbol "${var}" in current context'
  60
  61     gdb_test_multiple "print &${var}" "test eliminated var ${var}" {
  62         -re "No symbol \"${var}\" in current context\\.\[\r\n\]+${gdb_prompt} $" {
  63             pass "test eliminated var ${var}"
  64         }
  65         -re "\\\$\[0-9\]+ = \\(.*\\) (0|$hex)( <${var}>)?\[\r\n\]+${gdb_prompt} $" {
  66             fail "test eliminated var ${var}"
  67         }
  68     }
  69 }
  70
  71 # Check that the code and data eliminated in binfile1 are not included
  72 # into partial symtab... and that non-eliminated symbols are still there.
  73
  74 gdb_exit
  75 gdb_start
  76
  77 gdb_test "symbol-file ${binfile1}" \
  78         "Reading symbols from .*${testfile1}\\.\\.\\.done\\.(|\r\nUsing host libthread_db library .*libthread_db.so.*\\.)" \
  79         "symbol-file ${testfile1}"
  80
  81 with_test_prefix "single psymtabs" {
  82     test_eliminated_var my_global_symbol
  83     test_eliminated_var my_static_symbol
  84     test_eliminated_var my_global_func
  85     not_null_var_address main
  86 }
  87
  88 # Same thing for symtabs
  89
  90 gdb_exit
  91 global GDBFLAGS
  92 set saved_gdbflags $GDBFLAGS
  93 set GDBFLAGS "$GDBFLAGS --readnow $binfile1"
  94 gdb_start
  95 set GDBFLAGS $saved_gdbflags
  96
  97 with_test_prefix "single symtabs" {
  98     test_eliminated_var my_global_symbol
  99     test_eliminated_var my_static_symbol
 100     test_eliminated_var my_global_func
 101     not_null_var_address main
 102 }
 103
 104 # binfile2 contains the symbols that have been eliminated in binfile1. Check
 105 # the eliminated symbols does not hide these valid ones.
 106
 107 gdb_exit
 108 gdb_start
 109
 110 with_test_prefix "order1" {
 111     gdb_test "add-symbol-file ${binfile1} 0x100000 -s .bss 0x120000" \
 112             "Reading symbols from .*${testfile1}\\.\\.\\.done\\." \
 113             "add-symbol-file ${testfile1} 0x100000" \
 114             "add symbol table from file \".*${testfile1}\" at.*\\(y or n\\) " \
 115             "y"
 116
 117     gdb_test "add-symbol-file ${binfile2} 0x200000 -s .data 0x210000 -s .bss 0x220000" \
 118             "Reading symbols from .*${testfile2}\\.\\.\\.done\\." \
 119             "add-symbol-file ${testfile2} 0x200000" \
 120             "add symbol table from file \".*${testfile2}\" at.*\\(y or n\\) " \
 121             "y"
 122
 123     not_null_var_address my_global_symbol
 124     not_null_var_address my_static_symbol
 125     not_null_var_address my_global_func
 126     not_null_var_address main
 127 }
 128
 129 # Same thing, but loading binfile2 before binfile1.
 130
 131 gdb_exit
 132 gdb_start
 133
 134 with_test_prefix "order2" {
 135     gdb_test "add-symbol-file ${binfile2} 0x200000 -s .data 0x210000 -s .bss 0x220000" \
 136             "Reading symbols from .*${testfile2}\\.\\.\\.done\\." \
 137             "add-symbol-file ${testfile2} 0x200000" \
 138             "add symbol table from file \".*${testfile2}\" at.*\\(y or n\\) " \
 139             "y"
 140
 141     gdb_test "add-symbol-file ${binfile1} 0x100000 -s .bss 0x120000" \
 142             "Reading symbols from .*${testfile1}\\.\\.\\.done\\." \
 143             "add-symbol-file ${testfile1} 0x100000" \
 144             "add symbol table from file \".*${testfile1}\" at.*\\(y or n\\) " \
 145             "y"
 146
 147     not_null_var_address my_global_symbol
 148     not_null_var_address my_static_symbol
 149     not_null_var_address my_global_func
 150     not_null_var_address main
 151 }