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# Copyright 2012-2023 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 checks that GDB can load DWARF information from two
# separate split .DWO files.
load_lib dwarf.exp
# We run objcopy locally to split out the .dwo file.
require {!is_remote host}
# This test can only be run on targets which support DWARF-2 and use gas.
require dwarf2_support
# We place the entire source code for the test into a single .c file,
# but we generate the DWARF in two separate .S files. Each .S is
# compiled to a .o, then the DWARF is split into a .dwo file. Finally
# the all three .o files are merged into a single executable that will
# reference the two .dwo files.
standard_testfile .c -1-dw.S -2-cw.S
# Generate the first .S file.
set asm_file_1 [standard_output_file $srcfile2]
Dwarf::assemble $asm_file_1 {
global srcfile binfile objdir srcdir subdir
get_func_info func
declare_labels int4_type lines_table
set debug_addr_lbl ".unknown!!"
# The information that will be split out into the .dwo file.
cu {fission 1} {
# Capture a label to the current start of the .debug_addr
# section. This will be passed to DW_AT_GNU_addr_base in the
# non-split CU later.
set debug_addr_lbl [debug_addr_label]
compile_unit {
{language @DW_LANG_C}
{name ${srcfile}}
{DW_AT_comp_dir ${objdir}}
{DW_AT_GNU_dwo_id 0x1234 DW_FORM_data8}
} {
int4_type: DW_TAG_base_type {
{DW_AT_byte_size 4 DW_FORM_sdata}
{DW_AT_encoding @DW_ATE_signed}
{DW_AT_name int}
}
subprogram {
{external 1 flag}
{DW_AT_name func DW_FORM_string}
{MACRO_AT_func {func}}
{DW_AT_type :$int4_type}
} {
DW_TAG_formal_parameter {
{DW_AT_name arg}
{DW_AT_type :$int4_type}
{DW_AT_location {
DW_OP_GNU_addr_index [gdb_target_symbol global_param]
} SPECIAL_expr}
}
}
}
}
lines {version 2} lines_table {
include_dir "${srcdir}/${subdir}"
file_name "$srcfile" 1
program {
DW_LNE_set_address $func_start
DW_LNS_advance_line 24
DW_LNS_copy
DW_LNE_set_address line_label_4
DW_LNS_advance_line 3
DW_LNS_copy
DW_LNE_set_address $func_end
DW_LNS_advance_line 1
DW_LNS_copy
DW_LNE_end_sequence
}
}
# The information that will remain in the .o file.
cu {} {
compile_unit {
{DW_AT_GNU_dwo_name ${binfile}-1-dw.dwo DW_FORM_strp}
{DW_AT_comp_dir ${objdir}}
{DW_AT_GNU_dwo_id 0x1234 DW_FORM_data8}
{DW_AT_GNU_addr_base $debug_addr_lbl}
{stmt_list $lines_table DW_FORM_sec_offset}
} {
# Nothing.
}
}
}
# Generate the second .S file.
set asm_file_2 [standard_output_file $srcfile3]
Dwarf::assemble $asm_file_2 {
global srcfile binfile objdir srcdir subdir
set debug_addr_lbl ".unknown!!"
declare_labels int4_type lines_table
get_func_info main
# The information that will be split out into the .dwo file.
cu {fission 1} {
# Capture a label to the current start of the .debug_addr
# section. This will be passed to DW_AT_GNU_addr_base in the
# non-split CU later.
set debug_addr_lbl [debug_addr_label]
compile_unit {
{language @DW_LANG_C}
{name ${srcfile}}
{DW_AT_comp_dir ${objdir}}
{DW_AT_GNU_dwo_id 0x4567 DW_FORM_data8}
} {
int4_type: DW_TAG_base_type {
{DW_AT_byte_size 4 DW_FORM_sdata}
{DW_AT_encoding @DW_ATE_signed}
{DW_AT_name int}
}
subprogram {
{external 1 flag}
{DW_AT_name main DW_FORM_string}
{MACRO_AT_func {main}}
{DW_AT_type :$int4_type}
{DW_AT_decl_file 1 data1}
{DW_AT_decl_line 29 data1}
}
}
}
lines {version 2} lines_table {
include_dir "${srcdir}/${subdir}"
file_name "$srcfile" 1
program {
DW_LNE_set_address $main_start
DW_LNS_advance_line 32
DW_LNS_copy
DW_LNE_set_address line_label_1
DW_LNS_advance_line 3
DW_LNS_copy
DW_LNE_set_address line_label_2
DW_LNS_advance_line 2
DW_LNS_copy
DW_LNE_set_address line_label_3
DW_LNS_advance_line 2
DW_LNS_copy
DW_LNE_set_address $main_end
DW_LNS_advance_line 2
DW_LNS_copy
DW_LNE_end_sequence
}
}
# The information that will remain in the .o file.
cu {} {
compile_unit {
{DW_AT_GNU_dwo_name ${binfile}-2-dw.dwo DW_FORM_strp}
{DW_AT_comp_dir ${objdir}}
{DW_AT_GNU_dwo_id 0x4567 DW_FORM_data8}
{DW_AT_GNU_addr_base $debug_addr_lbl}
{stmt_list $lines_table DW_FORM_sec_offset}
} {
# Nothing.
}
}
}
# Compile all of the input files, split the DWARF into the .dwo files.
set obj1 [standard_output_file "${testfile}-1-dw.o"]
set obj2 [standard_output_file "${testfile}-2-dw.o"]
if [build_executable_and_dwo_files "$testfile.exp" "${binfile}" {nodebug} \
[list $asm_file_1 [list nodebug split-dwo] $obj1] \
[list $asm_file_2 [list nodebug split-dwo] $obj2] \
[list $srcfile [list nodebug]]] {
return -1
}
clean_restart $binfile
if ![runto_main] {
return -1
}
# Do a few basic things to verify we're finding the DWO debug info.
gdb_test "ptype main" "type = int \\(\\)"
gdb_test "ptype func" "type = int \\(int\\)"
gdb_test "frame" "#0 *main \\(\\) at \[^\r\n\]+${srcfile}:$decimal.*" \
"frame in main"
gdb_test "break func" "Breakpoint.*at.* file .*${srcfile}, line .*"
gdb_test "continue" "Breakpoint.* func \\(arg=-1\\).*" \
"continue to func"
gdb_test "frame" "#0 *func \\(arg=-1\\) at \[^\r\n\]+${srcfile}:$decimal.*" \
"frame in func"
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