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# Test macro handling of #included files.
# Copyright 2003-2021 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 <http://www.gnu.org/licenses/>.
# 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.
standard_testfile .c
if {[gdb_compile "${srcdir}/${subdir}/${srcfile}" ${binfile} executable {debug}] != ""} {
untested "failed to compile"
return -1
}
clean_restart ${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 -q 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)"
}
}
}
}
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