gdb/testsuite/gdb.base/lineinc.exp

   1 # Test macro handling of #included files.
   2 # Copyright 2003, 2007, 2008 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 # Please email any bugs, comments, and/or additions to this file to:
  18 # bug-gdb@prep.ai.mit.edu
  19
  20 # The test program lineinc.c contains a mix of #line directives and
  21 # #include directives that will cause the compiler to attribute more
  22 # than one #inclusion to the same source line.  You can get similar
  23 # effects using things like GCC's '-imacros' flag.
  24 #
  25 # Compiling lineinc.c with Dwarf 2 macro information will produce
  26 # something like this:
  27 #
  28 #     $ gcc -g3 lineinc.c -o lineinc
  29 #     $ readelf -wml lineinc
  30 #     ...
  31 #      The File Name Table:
  32 #       Entry   Dir     Time    Size    Name
  33 #       1       0       0       0       lineinc.c
  34 #       2       0       0       0       lineinc1.h
  35 #       3       0       0       0       lineinc2.h
  36 #       4       0       0       0       lineinc3.h
  37 #     ...
  38 #     Contents of the .debug_macinfo section:
  39 #
  40 #      DW_MACINFO_start_file - lineno: 0 filenum: 1
  41 #      DW_MACINFO_define - lineno : 1 macro : __VERSION__ "3.2 20020903 (Red Hat Linux 8.0 3.2-7)"
  42 #      DW_MACINFO_define - lineno : 2 macro : __USER_LABEL_PREFIX__
  43 #     ...
  44 #      DW_MACINFO_define - lineno : 1 macro : __i386__ 1
  45 #      DW_MACINFO_define - lineno : 1 macro : __tune_i386__ 1
  46 #      DW_MACINFO_start_file - lineno: 10 filenum: 2
  47 #      DW_MACINFO_define - lineno : 1 macro : FOO 1
  48 #      DW_MACINFO_end_file
  49 #      DW_MACINFO_start_file - lineno: 10 filenum: 3
  50 #      DW_MACINFO_undef - lineno : 1 macro : FOO
  51 #      DW_MACINFO_define - lineno : 2 macro : FOO 2
  52 #      DW_MACINFO_end_file
  53 #      DW_MACINFO_start_file - lineno: 11 filenum: 4
  54 #      DW_MACINFO_undef - lineno : 1 macro : FOO
  55 #      DW_MACINFO_define - lineno : 2 macro : FOO 3
  56 #      DW_MACINFO_end_file
  57 #      DW_MACINFO_end_file
  58 #     $
  59 #
  60 # Note how the inclusions of lineinc1.h and lineinc2.h are both
  61 # attributed to line 10 of lineinc.c, and the #inclusion of lineinc3.h
  62 # is attributed to line 11.  This is all correct, given the #line
  63 # directives in lineinc.c.
  64 #
  65 # Dwarf 2 macro information doesn't contain enough information to
  66 # allow GDB to figure out what's really going on here --- it makes no
  67 # mention of the #line directives --- so we just try to cope as best
  68 # we can.  If the macro table were to attribute more than one
  69 # #inclusion to the same source line, then GDB wouldn't be able to
  70 # tell which #included file's #definitions and #undefinitions come
  71 # first, so it can't tell which #definitions are in scope following
  72 # all the #inclusions.  To cope with this, GDB puts all the files
  73 # #included by a given source file in a list sorted by the line at
  74 # which they were #included; this gives GDB the chance to detect
  75 # multiple #inclusions at the same line, complain, and assign
  76 # distinct, albiet incorrect, line numbers to each #inclusion.
  77 #
  78 # However, at one point GDB was sorting the list in reverse order,
  79 # while the code to assign new, distinct line numbers assumed it was
  80 # sorted in ascending order; GDB would get an internal error trying to
  81 # read the above debugging info.
  82
  83 if $tracelevel then {
  84     strace $tracelevel
  85 }
  86
  87 set prms_id 0
  88 set bug_id 0
  89
  90 set testfile "lineinc"
  91 set binfile ${objdir}/${subdir}/${testfile}
  92
  93
  94 if {[gdb_compile "${srcdir}/${subdir}/${testfile}.c" ${binfile} executable {debug}] != ""} {
  95     untested lineinc.exp
  96     return -1
  97 }
  98
  99 gdb_exit
 100 gdb_start
 101 gdb_reinitialize_dir $srcdir/$subdir
 102 gdb_load ${binfile}
 103
 104 # Any command that causes GDB to read the debugging info for the
 105 # lineinc.c compilation unit will do here.
 106 set test_name "tolerate macro info with multiple #inclusions per line"
 107 gdb_test_multiple "break main" $test_name {
 108     -re "Breakpoint 1 at 0x.*: file .*lineinc.c.*\\.\r\n${gdb_prompt}" {
 109         pass $test_name
 110     }
 111     -re ".*internal-error:.*.y or n. " {
 112         fail $test_name
 113         send_gdb "y\n"
 114         gdb_expect {
 115             -re ".*.y or n. " {
 116                 send_gdb "n\n"
 117                 exp_continue
 118             }
 119             -re "$gdb_prompt" {
 120             }
 121             timeout {
 122                 fail "$test_name (timeout)"
 123             }
 124         }
 125     }
 126 }