ld/testsuite/ld-undefined/undefined.exp

   1 # Test that the linker reports undefined symbol errors correctly.
   2 # By Ian Lance Taylor, Cygnus Support
   3 #
   4 #   Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   5 #   2005, 2007, 2008, 2010, 2011  Free Software Foundation, Inc.
   6 #
   7 # This file is part of the GNU Binutils.
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 3 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program; if not, write to the Free Software
  21 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  22 # MA 02110-1301, USA.
  23
  24 set testund "undefined"
  25 set testfn "undefined function"
  26 set testline "undefined line"
  27
  28 if { ![is_remote host] && [which $CC] == 0 } {
  29     verbose "Could not find C compiler!" 1
  30     untested $testund
  31     untested $testfn
  32     untested $testline
  33     return
  34 }
  35
  36 if ![ld_compile "$CC -g" $srcdir/$subdir/undefined.c tmpdir/undefined.o] {
  37     verbose "Unable to compile test file!" 1
  38     unresolved $testund
  39     unresolved $testfn
  40     unresolved $testline
  41     return
  42 }
  43
  44 remote_file host delete "tmpdir/undefined"
  45
  46 set flags [big_or_little_endian]
  47
  48 # Using -e start prevents the SunOS linker from trying to build a
  49 # shared library.
  50 send_log "$ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o\n"
  51 set exec_output [run_host_cmd "$ld" "-e start $flags -o tmpdir/undefined tmpdir/undefined.o"]
  52
  53 send_log "$exec_output\n"
  54 verbose "$exec_output"
  55
  56 proc checkund { string testname } {
  57     global exec_output
  58
  59     if [string match "*$string*" $exec_output] {
  60         pass $testname
  61     } else {
  62         fail $testname
  63     }
  64 }
  65
  66 set mu "undefined reference to `*this_function_is_not_defined'"
  67 checkund $mu $testund
  68
  69 # ARM PE defaults to using stabs debugging, which we can't handle for
  70 # a COFF file.
  71 #setup_xfail "arm*-*-pe*"
  72
  73 # For Xtensa on GNU Linux systems (or any other system where PIC code is
  74 # always used), the address of the undefined function is in a literal pool
  75 # outside the function, so that both the "undefined function" and "undefined
  76 # line" tests fail.
  77 setup_xfail xtensa*-*-linux*
  78
  79 set mf "tmpdir/undefined.o* In function `function':"
  80 checkund $mf $testfn
  81
  82 if ![is_elf_format] {
  83     # COFF SH gets this test wrong--it reports line 10, because although
  84     # the jump is at line 9, the function address, and the reloc, is
  85     # stored at the end of the function.
  86     setup_xfail "sh-*-*"
  87
  88     # ARM PE defaults to using stabs debugging, which we can't handle for
  89     # a COFF file.
  90     #setup_xfail "arm*-*-pe*"
  91 }
  92
  93 set ml "undefined.c:9: undefined reference to `*this_function_is_not_defined'"
  94 # With targets that use elf/dwarf2, such as the arm-elf
  95 # toolchain, the code in bfd/elf.c:_bfd_elf_find_nearest_line() is called
  96 # in order to locate the file name/line number where the undefined
  97 # reference occurs.  Unfortunately this tries to use the dwarf2 debug
  98 # information held in the .debug_info section.  This section contains a series
  99 # of comp_unit structures, each of which has a low/high address range
 100 # representing the span of memory locations covered by that structure.  The
 101 # structures also index into other structures held in the .debug_line section
 102 # and together they can translate memory locations back into file/function/line
 103 # number addresses in the source code.  Since the information about the memory
 104 # region covered by a comp_unit is only determined at link time, the low/high
 105 # addresses in the .debug_info section and the line addresses in the .debug_line
 106 # section are computed by generating relocs against known symbols in the object
 107 # code.
 108 #
 109 # When the undefined reference is detected, the relocs in the dwarf2
 110 # debug sections have not yet been resolved, so the low/high addresses and the
 111 # line number address are all set at zero.  Thus when _bfd_elf_find_nearest_line()
 112 # calls _bfd_dwarf2_find_nearest_line() no comp_unit can be found which
 113 # actually covers the address where the reference occured, and so
 114 # _bfd_elf_find_nearest_line() fails.
 115 #
 116 # The upshot of all of this, is that the error message reported by the
 117 # linker, instead of having a source file name & line number as in:
 118 #
 119 #   undefined.c:9: undefined reference to `this_function_is_not_defined'
 120 #
 121 # has an object file & section address instead:
 122 #
 123 #   undefined.0(.text+0xc): undefined reference to `this_function_is_not_defined'
 124 #
 125 # hence the xfails below.
 126
 127 setup_xfail mcore-*-elf
 128 setup_xfail mep-*-*
 129 setup_xfail mips-sgi-irix6*
 130 setup_xfail "sh64-*-*"
 131 # Fails for the MSP430 because it uses SYM_DIFF relocs but it does
 132 # not provide a special_function for handling them.  If optimization
 133 # is enabled then this test passes because function()'s prologue is
 134 # eliminated.
 135 setup_xfail "msp430-*-*"
 136
 137 # The undefined test fails on 31 bit s/390 because the address of the
 138 # function `this_function_is_not_defined' is stored in the literal pool of
 139 # the function. Therefore the line number in the error message is 8 instead
 140 # of 9. On 64 bit s/390 this works because of the new brasl instruction that
 141 # doesn't need a literal pool entry.
 142 setup_xfail s390-*-*
 143
 144 # See comments above for Xtensa.
 145 setup_xfail xtensa*-*-linux*
 146 setup_xfail hppa*64*-*-*
 147
 148 checkund $ml $testline