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e75d765e2b
When printing complaints with one of the execs from test-case
gdb.dwarf2/macro-source-path.exp, we run into:
...
$ gdb -q -batch \
-iex "set complaints 100" \
macro-source-path-clang14-dw4-absolute-cwd-32 \
-ex "p main"
During symbol reading: debug info runs off end of .debug_macro section \
[in module macro-source-path-clang14-dw4-absolute-cwd-32]
$1 = {int ()} 0x4004b7 <main>
...
and readelf complains more specifically:
...
Contents of the .debug_macro section:
Offset: 0
Version: 5
Offset size: 4
Offset into .debug_line: 0xe3
DW_MACRO_define - lineno : 0 macro : ONE 1
DW_MACRO_define_strp - lineno : 0 macro : THREE 3
DW_MACRO_start_file - lineno: 0 filenum: 1 filename: test.c
DW_MACRO_define - lineno : 1 macro : TWO 2
DW_MACRO_end_file
readelf: Error: .debug_macro section not zero terminated
...
Fix this by adding the missing terminator in Dwarf::_macro_unit.
Tested on x86_64-linux.
Approved-By: Tom Tromey <tom@tromey.com>
408 lines
9.2 KiB
Plaintext
408 lines
9.2 KiB
Plaintext
# This testcase is part of GDB, the GNU debugger.
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# Copyright 2022-2024 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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# Generate binaries imitating different ways source file paths can be passed to
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# compilers. Test printing macros from those binaries.
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load_lib dwarf.exp
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require dwarf2_support
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standard_testfile .c
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lassign [function_range main $srcdir/$subdir/$srcfile] \
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main_start main_len
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# Run one test.
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#
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# - TEST_NAME is the name of the test, used to differentiate the binaries.
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# - LINES_VERSION is the version of the version of the .debug_line section to
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# generate.
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# - DW_AT_NAME is the string to put in the compilation unit's DW_AT_name
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# attribute.
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# - MAIN_FILE_IDX is the file index the .debug_line and .debug_macro sections
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# will use to refer to the main file.
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# - DIRECTORIES is a list of directories to put in the .debug_line section
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# header
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# - FILE_NAMES is a list of {name, directory index} pairs describing the files
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# names to put in the .debug_line section header.
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proc do_test { test_name lines_version DW_AT_name main_file_idx directories
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file_names } {
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with_test_prefix "test_name=$test_name" {
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foreach_with_prefix is_64 {true false} {
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# So we can access them in Dwarf::assemble...
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set ::lines_version $lines_version
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set ::DW_AT_name $DW_AT_name
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set ::main_file_idx $main_file_idx
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set ::directories $directories
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set ::file_names $file_names
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set ::is_64 $is_64
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set 32_or_64 [expr $is_64 ? 64 : 32]
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set asm_file [standard_output_file ${::testfile}-${test_name}-${32_or_64}.S]
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Dwarf::assemble $asm_file {
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declare_labels Llines cu_macros
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# DW_AT_comp_dir is always the current working directory
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# from which the compiler was invoked. We pretend the compiler was
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# always launched from /tmp/cwd.
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set comp_dir "/tmp/cwd"
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cu {} {
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DW_TAG_compile_unit {
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{DW_AT_producer "My C Compiler"}
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{DW_AT_language @DW_LANG_C11}
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{DW_AT_name $::DW_AT_name}
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{DW_AT_comp_dir $comp_dir}
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{DW_AT_stmt_list $Llines DW_FORM_sec_offset}
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{DW_AT_macros $cu_macros DW_FORM_sec_offset}
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} {
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declare_labels int_type
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int_type: DW_TAG_base_type {
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{DW_AT_byte_size 4 DW_FORM_sdata}
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{DW_AT_encoding @DW_ATE_signed}
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{DW_AT_name int}
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}
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DW_TAG_subprogram {
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{MACRO_AT_func {main}}
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{type :$int_type}
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}
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}
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}
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# Define the .debug_line section.
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lines [list version $::lines_version] "Llines" {
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foreach directory $::directories {
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include_dir $directory
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}
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foreach file_name $::file_names {
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lassign $file_name name dir_index
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file_name $name $dir_index
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}
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# A line number program just good enough so that GDB can
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# figure out we are stopped in main.
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program {
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DW_LNS_set_file $::main_file_idx
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DW_LNE_set_address $::main_start
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line 10
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DW_LNS_copy
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DW_LNE_set_address "$::main_start + $::main_len"
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DW_LNE_end_sequence
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}
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}
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# Define the .debug_macro section.
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macro {
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cu_macros: unit {
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"debug-line-offset-label" $Llines
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"is-64" $::is_64
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} {
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# A macro defined outside the main file, as if it was defined
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# on the command line with -D.
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#
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# Clang has this bug where it puts the macros defined on
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# the command-line after the main file portion (see
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# PR 29034). We're not trying to replicate that here,
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# this is not in the scope of this test.
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define 0 "ONE 1"
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define_strp 0 "THREE 3"
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start_file 0 $::main_file_idx
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# A macro defined at line 1 of the main file.
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define 1 "TWO 2"
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end_file
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}
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}
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}
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if { [prepare_for_testing "failed to prepare" ${::testfile}-${test_name}-${32_or_64} \
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[list $::srcfile $asm_file] {nodebug}] } {
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return
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}
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with_complaints 5 {
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gdb_test_multiple "print main" "no complaints" {
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-wrap -re "During symbol reading: .*" {
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fail $gdb_test_name
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}
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-wrap -re "" {
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pass $gdb_test_name
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}
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}
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}
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if ![runto_main] {
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return
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}
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gdb_test "print ONE" " = 1"
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gdb_test "print TWO" " = 2"
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gdb_test "print THREE" " = 3"
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}
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}
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}
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# When adding a test here, please consider adding an equivalent case to the test
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# of the same name in gdb.base.
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# The following tests are based on the output of `gcc -gdwarf-5 -g3 <file>`,
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# gcc 11 paired with gas from binutils 2.38.
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## test.c
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do_test gcc11-ld238-dw5-filename 5 "test.c" 1 {
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"/tmp/cwd"
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} {
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{"test.c" 0}
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{"test.c" 0}
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}
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## ./test.c
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do_test gcc11-ld238-dw5-dot-filename 5 "./test.c" 1 {
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"/tmp/cwd"
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"."
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} {
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{"test.c" 1}
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{"test.c" 1}
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}
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## ../cwd/test.c
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do_test gcc11-ld238-dw5-dot-dot-cwd 5 "../cwd/test.c" 1 {
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"/tmp/cwd"
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"../cwd"
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} {
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{"test.c" 1}
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{"test.c" 1}
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}
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## /tmp/cwd/test.c
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do_test gcc11-ld238-dw5-absolute-cwd 5 "/tmp/cwd/test.c" 1 {
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"/tmp/cwd"
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"/tmp/cwd"
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} {
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{"test.c" 1}
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{"test.c" 0}
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}
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## ../other/test.c
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do_test gcc11-ld238-dw5-dot-dot-other 5 "../other/test.c" 1 {
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"/tmp/cwd"
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"../other"
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} {
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{"test.c" 1}
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{"test.c" 1}
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}
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## /tmp/other/test.c
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do_test gcc11-ld238-dw5-absolute-other 5 "/tmp/other/test.c" 1 {
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"/tmp/cwd"
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"/tmp/other"
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} {
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{"test.c" 1}
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{"test.c" 1}
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}
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# The following tests are based on the output of `gcc -gdwarf-4 -g3 <file>`,
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# gcc 11 paired with gas from binutils 2.38. With -gdwarf-4, gcc generates a
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# v4 (pre-standard) .debug_macro section.
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## test.c
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do_test gcc11-ld238-dw4-filename 4 "test.c" 1 {
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} {
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{"test.c" 0}
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}
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## ./test.c
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do_test gcc11-ld238-dw4-dot-filename 4 "./test.c" 1 {
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"."
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} {
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{"test.c" 1}
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}
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## ../cwd/test.c
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do_test gcc11-ld238-dw4-dot-dot-cwd 4 "../cwd/test.c" 1 {
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"../cwd"
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} {
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{"test.c" 1}
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}
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## /tmp/cwd/test.c
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do_test gcc11-ld238-dw4-absolute-cwd 4 "/tmp/cwd/test.c" 1 {
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"/tmp/cwd"
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} {
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{"test.c" 1}
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}
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## ../other/test.c
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do_test gcc11-ld238-dw4-dot-dot-other 4 "../other/test.c" 1 {
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"../other"
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} {
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{"test.c" 1}
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}
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## /tmp/other/test.c
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do_test gcc11-ld238-dw4-absolute-other 4 "/tmp/other/test.c" 1 {
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"/tmp/other"
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} {
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{"test.c" 1}
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}
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# The following tests are based on the output of `clang-14 -gdwarf-5
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# -fdebug-macro -g3 <file>` (using its built-in assembler)
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## test.c
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do_test clang14-dw5-filename 5 "test.c" 0 {
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"/tmp/cwd"
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} {
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{"test.c" 0}
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}
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## ./test.c
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do_test clang14-dw5-dot-filename 5 "test.c" 1 {
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"/tmp/cwd"
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"."
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} {
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{"test.c" 0}
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{"test.c" 1}
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}
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## ../cwd/test.c
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do_test clang14-dw5-dot-dot-cwd 5 "../cwd/test.c" 0 {
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"/tmp/cwd"
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} {
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{"../cwd/test.c" 0}
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}
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## /tmp/cwd/test.c
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do_test clang14-dw5-absolute-cwd 5 "/tmp/cwd/test.c" 1 {
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"/tmp/cwd"
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} {
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{"/tmp/cwd/test.c" 0}
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{"test.c" 0}
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}
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## ../other/test.c
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do_test clang14-dw5-dot-dot-other 5 "../other/test.c" 0 {
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"/tmp/cwd"
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} {
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{"../other/test.c" 0}
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}
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## /tmp/other/test.c
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do_test clang14-dw5-absolute-other 5 "/tmp/other/test.c" 1 {
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"/tmp/cwd"
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"/tmp"
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} {
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{"/tmp/other/test.c" 0}
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{"other/test.c" 1}
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}
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# The following tests are based on the output of `clang-14 -gdwarf-4
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# -fdebug-macro -g3 <file>` (using its built-in assembler). With -gdwarf-4,
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# clang produces a .debug_macinfo section, not a .debug_macro section. But
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# this test still creates a .debug_macro section, that's good enough for what
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# we want to test.
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## test.c
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do_test clang14-dw4-filename 4 "test.c" 1 {
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} {
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{"test.c" 0}
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}
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## ./test.c
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do_test clang14-dw4-dot-filename 4 "test.c" 1 {
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"."
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} {
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{"test.c" 1}
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}
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## ../cwd/test.c
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do_test clang14-dw4-dot-dot-cwd 4 "../cwd/test.c" 1 {
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"../cwd"
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} {
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{"test.c" 1}
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}
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## /tmp/cwd/test.c
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do_test clang14-dw4-absolute-cwd 4 "/tmp/cwd/test.c" 1 {
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} {
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{"test.c" 0}
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}
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## ../other/test.c
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do_test clang14-dw4-dot-dot-other 4 "../other/test.c" 1 {
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"../other"
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} {
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{"test.c" 1}
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}
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## /tmp/other/test.c
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do_test clang14-dw4-absolute-other 4 "/tmp/other/test.c" 1 {
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"/tmp"
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} {
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{"other/test.c" 1}
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}
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# The following tests are based on the output of `gcc -gdwarf-5 -g3 <file>`,
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# gcc 11 paired with gas from binutils 2.34 (Ubuntu 20.04). It generates a v5
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# .debug_macro section, but a v3 .debug_line section.
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## test.c
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do_test gcc11-ld234-dw5-filename 3 "test.c" 1 {
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} {
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{"test.c" 0}
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}
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## ./test.c
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do_test gcc11-ld234-dw5-dot-filename 3 "./test.c" 1 {
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"."
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} {
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{"test.c" 1}
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}
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## ../cwd/test.c
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do_test gcc11-ld234-dw5-dot-dot-cwd 3 "../cwd/test.c" 1 {
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"../cwd"
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} {
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{"test.c" 1}
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}
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## /tmp/cwd/test.c
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do_test gcc11-ld234-dw5-absolute-cwd 3 "/tmp/cwd/test.c" 1 {
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"/tmp/cwd"
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} {
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{"test.c" 1}
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}
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## ../other/test.c
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do_test gcc11-ld234-dw5-dot-dot-other 3 "../other/test.c" 1 {
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"../other"
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} {
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{"test.c" 1}
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}
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## /tmp/other/test.c
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do_test gcc11-ld234-dw5-absolute-other 3 "/tmp/other/test.c" 1 {
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"/tmp/other"
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} {
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{"test.c" 1}
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}
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