gdb/testsuite/gdb.base/lineinc.exp

   1 # Test macro handling of #included files.
   2 # Copyright 2003-2016 Free Software Foundation, Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 # The test program lineinc.c contains a mix of #line directives and
  18 # #include directives that will cause the compiler to attribute more
  19 # than one #inclusion to the same source line.  You can get similar
  20 # effects using things like GCC's '-imacros' flag.
  21 #
  22 # Compiling lineinc.c with Dwarf 2 macro information will produce
  23 # something like this:
  24 #
  25 #     $ gcc -g3 lineinc.c -o lineinc
  26 #     $ readelf -wml lineinc
  27 #     ...
  28 #      The File Name Table:
  29 #       Entry   Dir     Time    Size    Name
  30 #       1       0       0       0       lineinc.c
  31 #       2       0       0       0       lineinc1.h
  32 #       3       0       0       0       lineinc2.h
  33 #       4       0       0       0       lineinc3.h
  34 #     ...
  35 #     Contents of the .debug_macinfo section:
  36 #
  37 #      DW_MACINFO_start_file - lineno: 0 filenum: 1
  38 #      DW_MACINFO_define - lineno : 1 macro : __VERSION__ "3.2 20020903 (Red Hat Linux 8.0 3.2-7)"
  39 #      DW_MACINFO_define - lineno : 2 macro : __USER_LABEL_PREFIX__
  40 #     ...
  41 #      DW_MACINFO_define - lineno : 1 macro : __i386__ 1
  42 #      DW_MACINFO_define - lineno : 1 macro : __tune_i386__ 1
  43 #      DW_MACINFO_start_file - lineno: 10 filenum: 2
  44 #      DW_MACINFO_define - lineno : 1 macro : FOO 1
  45 #      DW_MACINFO_end_file
  46 #      DW_MACINFO_start_file - lineno: 10 filenum: 3
  47 #      DW_MACINFO_undef - lineno : 1 macro : FOO
  48 #      DW_MACINFO_define - lineno : 2 macro : FOO 2
  49 #      DW_MACINFO_end_file
  50 #      DW_MACINFO_start_file - lineno: 11 filenum: 4
  51 #      DW_MACINFO_undef - lineno : 1 macro : FOO
  52 #      DW_MACINFO_define - lineno : 2 macro : FOO 3
  53 #      DW_MACINFO_end_file
  54 #      DW_MACINFO_end_file
  55 #     $
  56 #
  57 # Note how the inclusions of lineinc1.h and lineinc2.h are both
  58 # attributed to line 10 of lineinc.c, and the #inclusion of lineinc3.h
  59 # is attributed to line 11.  This is all correct, given the #line
  60 # directives in lineinc.c.
  61 #
  62 # Dwarf 2 macro information doesn't contain enough information to
  63 # allow GDB to figure out what's really going on here --- it makes no
  64 # mention of the #line directives --- so we just try to cope as best
  65 # we can.  If the macro table were to attribute more than one
  66 # #inclusion to the same source line, then GDB wouldn't be able to
  67 # tell which #included file's #definitions and #undefinitions come
  68 # first, so it can't tell which #definitions are in scope following
  69 # all the #inclusions.  To cope with this, GDB puts all the files
  70 # #included by a given source file in a list sorted by the line at
  71 # which they were #included; this gives GDB the chance to detect
  72 # multiple #inclusions at the same line, complain, and assign
  73 # distinct, albiet incorrect, line numbers to each #inclusion.
  74 #
  75 # However, at one point GDB was sorting the list in reverse order,
  76 # while the code to assign new, distinct line numbers assumed it was
  77 # sorted in ascending order; GDB would get an internal error trying to
  78 # read the above debugging info.
  79
  80
  81 standard_testfile .c
  82
  83 if {[gdb_compile "${srcdir}/${subdir}/${srcfile}" ${binfile} executable {debug}] != ""} {
  84     untested "failed to compile"
  85     return -1
  86 }
  87
  88 clean_restart ${binfile}
  89
  90 # Any command that causes GDB to read the debugging info for the
  91 # lineinc.c compilation unit will do here.
  92 set test_name "tolerate macro info with multiple #inclusions per line"
  93 gdb_test_multiple "break main" $test_name {
  94     -re "Breakpoint 1 at 0x.*: file .*lineinc.c.*\\.\r\n${gdb_prompt}" {
  95         pass $test_name
  96     }
  97     -re ".*internal-error:.*.y or n. " {
  98         fail $test_name
  99         send_gdb "y\n"
 100         gdb_expect {
 101             -re ".*.y or n. " {
 102                 send_gdb "n\n"
 103                 exp_continue
 104             }
 105             -re "$gdb_prompt" {
 106             }
 107             timeout {
 108                 fail "$test_name (timeout)"
 109             }
 110         }
 111     }
 112 }