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# Test macro handling of #included files.

# Copyright 2003, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see .

# The test program lineinc.c contains a mix of #line directives and

# #include directives that will cause the compiler to attribute more

# than one #inclusion to the same source line.  You can get similar

# effects using things like GCC's '-imacros' flag.

#

# Compiling lineinc.c with Dwarf 2 macro information will produce

# something like this:

#

#     $ gcc -g3 lineinc.c -o lineinc

#     $ readelf -wml lineinc

#     ...

#      The File Name Table:

#       Entry   Dir     Time    Size    Name

#       1       0        0        0        lineinc.c

#       2       0        0        0        lineinc1.h

#       3       0        0        0        lineinc2.h

#       4       0        0        0        lineinc3.h

#     ...

#     Contents of the .debug_macinfo section:

#

#      DW_MACINFO_start_file - lineno: 0 filenum: 1

#      DW_MACINFO_define - lineno : 1 macro : __VERSION__ "3.2 20020903 (Red Hat Linux 8.0 3.2-7)"

#      DW_MACINFO_define - lineno : 2 macro : __USER_LABEL_PREFIX__

#     ...

#      DW_MACINFO_define - lineno : 1 macro : __i386__ 1

#      DW_MACINFO_define - lineno : 1 macro : __tune_i386__ 1

#      DW_MACINFO_start_file - lineno: 10 filenum: 2

#      DW_MACINFO_define - lineno : 1 macro : FOO 1

#      DW_MACINFO_end_file

#      DW_MACINFO_start_file - lineno: 10 filenum: 3

#      DW_MACINFO_undef - lineno : 1 macro : FOO

#      DW_MACINFO_define - lineno : 2 macro : FOO 2

#      DW_MACINFO_end_file

#      DW_MACINFO_start_file - lineno: 11 filenum: 4

#      DW_MACINFO_undef - lineno : 1 macro : FOO

#      DW_MACINFO_define - lineno : 2 macro : FOO 3

#      DW_MACINFO_end_file

#      DW_MACINFO_end_file

#     $

#

# Note how the inclusions of lineinc1.h and lineinc2.h are both

# attributed to line 10 of lineinc.c, and the #inclusion of lineinc3.h

# is attributed to line 11.  This is all correct, given the #line

# directives in lineinc.c.

#

# Dwarf 2 macro information doesn't contain enough information to

# allow GDB to figure out what's really going on here --- it makes no

# mention of the #line directives --- so we just try to cope as best

# we can.  If the macro table were to attribute more than one

# #inclusion to the same source line, then GDB wouldn't be able to

# tell which #included file's #definitions and #undefinitions come

# first, so it can't tell which #definitions are in scope following

# all the #inclusions.  To cope with this, GDB puts all the files

# #included by a given source file in a list sorted by the line at

# which they were #included; this gives GDB the chance to detect

# multiple #inclusions at the same line, complain, and assign

# distinct, albiet incorrect, line numbers to each #inclusion.

#

# However, at one point GDB was sorting the list in reverse order,

# while the code to assign new, distinct line numbers assumed it was

# sorted in ascending order; GDB would get an internal error trying to

# read the above debugging info.

if $tracelevel then {

    strace $tracelevel

}

set testfile "lineinc"

set binfile ${objdir}/${subdir}/${testfile}

if {[gdb_compile "${srcdir}/${subdir}/${testfile}.c" ${binfile} executable {debug}] != ""} {

    untested lineinc.exp

    return -1

}

gdb_exit

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

# Any command that causes GDB to read the debugging info for the

# lineinc.c compilation unit will do here.

set test_name "tolerate macro info with multiple #inclusions per line"

gdb_test_multiple "break main" $test_name {

    -re "Breakpoint 1 at 0x.*: file .*lineinc.c.*\\.\r\n${gdb_prompt}" {

        pass $test_name

    }

    -re ".*internal-error:.*.y or n. " {

        fail $test_name

        send_gdb "y\n"

        gdb_expect {

            -re ".*.y or n. " {

                send_gdb "n\n"

                exp_continue

            }

            -re "$gdb_prompt" {

            }

            timeout {

                fail "$test_name (timeout)"

            }

        }

    }

}