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# Copyright 2021-2024 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/>.
# This test is as much about testing the lib/dwarf.exp DWARF generator
# as it is about testing GDB. At the time this test was written, this
# was the only test that generated any DWARF using DW_FORM_strp.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
require dwarf2_support
standard_testfile .c -dw.S
if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] } {
return -1
}
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
global srcfile
cu {} {
compile_unit {
{language @DW_LANG_C}
{name ${srcfile}}
} {
declare_labels int4_type struct_type
int4_type: DW_TAG_base_type {
{DW_AT_byte_size 4 DW_FORM_sdata}
{DW_AT_encoding @DW_ATE_signed}
{DW_AT_name integer}
}
struct_type: DW_TAG_structure_type {
{DW_AT_name "foo_t" DW_FORM_strp}
{DW_AT_byte_size 12 DW_FORM_sdata}
} {
member {
{name "aa" DW_FORM_strp}
{type :$int4_type}
{data_member_location 0 data1}
}
member {
{name "bb" DW_FORM_strp}
{type :$int4_type}
{data_member_location 4 data1}
}
member {
{name "cc" DW_FORM_strp}
{type :$int4_type}
{data_member_location 8 data1}
}
}
DW_TAG_variable {
{DW_AT_name global_var DW_FORM_strp}
{DW_AT_type :$struct_type}
{DW_AT_location {
DW_OP_addr [gdb_target_symbol global_var]
} SPECIAL_expr}
{external 1 flag}
}
subprogram {
{external 1 flag}
{name main DW_FORM_strp}
{MACRO_AT_range {main}}
}
}
}
}
if { [prepare_for_testing "failed to prepare" ${testfile} \
[list $srcfile $asm_file] {nodebug}] } {
return -1
}
if ![runto_main] {
return -1
}
# Print the type of global_var. This type information is entirely
# fictional, it only exists in the DWARF, but it contains lots of nice
# field names, all of which are stored in the .debug_str section.
gdb_test "p global_var" " = \\{aa = 0, bb = 0, cc = 0\\}"
set host_binfile [gdb_remote_download host $binfile]
# Verify that the executable actually contains a .debug_str section, before
# trying to remove it. This can be missing with target boards
# cc-with-dwz-m.exp and cc-with-gnu-debuglink.exp. Handle this by
# skipping the remainder of the test-case.
set debug_str_section "${host_binfile}-debug-str"
set args "--dump-section .debug_str=${debug_str_section} $host_binfile"
set result [remote_exec host "[gdb_find_objcopy] $args"]
set status [lindex $result 0]
set output [lindex $result 1]
if { $status == 0 && ![string equal $output ""] } {
return -1
}
# Now copy the executable, and remove the .debug_str section. This
# creates an executable with an invalid DWARF configuration. GDB
# should give an error when trying to read the debug information from
# this executable.
set binfile_no_debug_str "${host_binfile}-no-debug-str"
set args "--remove-section .debug_str $host_binfile ${binfile_no_debug_str}"
if {[run_on_host "objcopy" [gdb_find_objcopy] "$args"]} {
perror "failed to run objcopy"
return -1
}
# Restart GDB, but don't load an executable. When we do load the
# executable we're going to get an error, which we check for below.
clean_restart
gdb_test_no_output "maint set dwarf synchronous on"
set line1 "Reading symbols from \[^\r\n\]+"
set dwarf_error "DWARF Error: DW_FORM_strp used without required section"
# This pattern is hit when GDB does not use -readnow (i.e. the default
# behavior).
set pattern1 \
[multi_line \
$line1 \
$dwarf_error \
"\\(No debugging symbols \[^\r\n\]+\\)"]
# This pattern is hit when GDB does use -readnow (e.g. running with
# --target_board=readnow).
set pattern2 \
[multi_line \
$line1 \
"Expanding full symbols from \[^\r\n\]+" \
$dwarf_error]
# This pattern is hit when gcc adds an index (e.g. running with
# --target_board=cc-with-gdb-index).
set pattern3 \
[multi_line \
$line1 \
$dwarf_error]
# Load the executable, we expect an error from the DWARF parser.
gdb_test "file $binfile_no_debug_str" "($pattern1|$pattern2|$pattern3)" \
"file $testfile"
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