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