112 lines
4.3 KiB
Text
112 lines
4.3 KiB
Text
# Test macro handling of #included files.
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# Copyright 2003-2016 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# The test program lineinc.c contains a mix of #line directives and
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# #include directives that will cause the compiler to attribute more
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# than one #inclusion to the same source line. You can get similar
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# effects using things like GCC's '-imacros' flag.
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#
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# Compiling lineinc.c with Dwarf 2 macro information will produce
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# something like this:
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#
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# $ gcc -g3 lineinc.c -o lineinc
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# $ readelf -wml lineinc
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# ...
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# The File Name Table:
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# Entry Dir Time Size Name
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# 1 0 0 0 lineinc.c
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# 2 0 0 0 lineinc1.h
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# 3 0 0 0 lineinc2.h
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# 4 0 0 0 lineinc3.h
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# ...
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# Contents of the .debug_macinfo section:
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#
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# DW_MACINFO_start_file - lineno: 0 filenum: 1
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# DW_MACINFO_define - lineno : 1 macro : __VERSION__ "3.2 20020903 (Red Hat Linux 8.0 3.2-7)"
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# DW_MACINFO_define - lineno : 2 macro : __USER_LABEL_PREFIX__
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# ...
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# DW_MACINFO_define - lineno : 1 macro : __i386__ 1
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# DW_MACINFO_define - lineno : 1 macro : __tune_i386__ 1
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# DW_MACINFO_start_file - lineno: 10 filenum: 2
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# DW_MACINFO_define - lineno : 1 macro : FOO 1
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# DW_MACINFO_end_file
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# DW_MACINFO_start_file - lineno: 10 filenum: 3
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# DW_MACINFO_undef - lineno : 1 macro : FOO
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# DW_MACINFO_define - lineno : 2 macro : FOO 2
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# DW_MACINFO_end_file
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# DW_MACINFO_start_file - lineno: 11 filenum: 4
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# DW_MACINFO_undef - lineno : 1 macro : FOO
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# DW_MACINFO_define - lineno : 2 macro : FOO 3
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# DW_MACINFO_end_file
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# DW_MACINFO_end_file
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# $
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#
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# Note how the inclusions of lineinc1.h and lineinc2.h are both
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# attributed to line 10 of lineinc.c, and the #inclusion of lineinc3.h
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# is attributed to line 11. This is all correct, given the #line
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# directives in lineinc.c.
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#
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# Dwarf 2 macro information doesn't contain enough information to
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# allow GDB to figure out what's really going on here --- it makes no
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# mention of the #line directives --- so we just try to cope as best
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# we can. If the macro table were to attribute more than one
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# #inclusion to the same source line, then GDB wouldn't be able to
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# tell which #included file's #definitions and #undefinitions come
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# first, so it can't tell which #definitions are in scope following
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# all the #inclusions. To cope with this, GDB puts all the files
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# #included by a given source file in a list sorted by the line at
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# which they were #included; this gives GDB the chance to detect
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# multiple #inclusions at the same line, complain, and assign
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# distinct, albiet incorrect, line numbers to each #inclusion.
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#
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# However, at one point GDB was sorting the list in reverse order,
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# while the code to assign new, distinct line numbers assumed it was
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# sorted in ascending order; GDB would get an internal error trying to
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# read the above debugging info.
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standard_testfile .c
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if {[gdb_compile "${srcdir}/${subdir}/${srcfile}" ${binfile} executable {debug}] != ""} {
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untested lineinc.exp
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return -1
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}
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clean_restart ${binfile}
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# Any command that causes GDB to read the debugging info for the
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# lineinc.c compilation unit will do here.
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set test_name "tolerate macro info with multiple #inclusions per line"
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gdb_test_multiple "break main" $test_name {
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-re "Breakpoint 1 at 0x.*: file .*lineinc.c.*\\.\r\n${gdb_prompt}" {
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pass $test_name
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}
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-re ".*internal-error:.*.y or n. " {
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fail $test_name
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send_gdb "y\n"
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gdb_expect {
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-re ".*.y or n. " {
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send_gdb "n\n"
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exp_continue
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}
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-re "$gdb_prompt" {
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}
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timeout {
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fail "$test_name (timeout)"
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}
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}
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}
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}
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