1 # Test macro handling of #included files.
2 # Copyright 2003, 2007 Free Software Foundation, Inc.
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.
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.
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/>.
17 # Please email any bugs, comments, and/or additions to this file to:
18 # bug-gdb@prep.ai.mit.edu
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.
25 # Compiling lineinc.c with Dwarf 2 macro information will produce
26 # something like this:
28 # $ gcc -g3 lineinc.c -o lineinc
29 # $ readelf -wml lineinc
31 # The File Name Table:
32 # Entry Dir Time Size Name
38 # Contents of the .debug_macinfo section:
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__
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
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
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
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.
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.
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.
90 set testfile "lineinc"
91 set binfile ${objdir}/${subdir}/${testfile}
94 if {[gdb_compile "${srcdir}/${subdir}/${testfile}.c" ${binfile} executable {debug}] != ""} {
101 gdb_reinitialize_dir $srcdir/$subdir
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}" {
111 -re ".*internal-error:.*.y or n. " {
122 fail "$test_name (timeout)"