1# Test macro handling of #included files. 2# Copyright 2003-2015 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 81standard_testfile .c 82 83if {[gdb_compile "${srcdir}/${subdir}/${srcfile}" ${binfile} executable {debug}] != ""} { 84 untested lineinc.exp 85 return -1 86} 87 88clean_restart ${binfile} 89 90# Any command that causes GDB to read the debugging info for the 91# lineinc.c compilation unit will do here. 92set test_name "tolerate macro info with multiple #inclusions per line" 93gdb_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} 113