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[gdb/testsuite] Add gdb.dwarf2/debug-names-tu.exp
Add a test-case gdb.dwarf2/debug-names-tu.exp, that uses the dwarf assembler to specify a .debug_names index with the TU list referring to a TU from the .debug_types section. This is intended to produce something similar to: ... $ gcc -g -fdebug-types-section ~/hello.c -gdwarf-4 $ gdb-add-index -dwarf-5 a.out ... Tested on x86_64-linux.
This commit is contained in:
Tom de Vries
parent
9869e2e5c7
commit
4c146f5d60
93
gdb/testsuite/gdb.dwarf2/debug-names-tu.exp
Normal file
93
gdb/testsuite/gdb.dwarf2/debug-names-tu.exp
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@ -0,0 +1,93 @@
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# Copyright 2022 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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load_lib dwarf.exp
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# This test can only be run on targets which support DWARF-2 and use gas.
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if {![dwarf2_support]} {
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return 0
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}
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standard_testfile _start.c debug-names.S
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set func_info_vars \
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[get_func_info _start [list debug additional_flags=-nostartfiles]]
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# Create the DWARF.
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set asm_file [standard_output_file $srcfile2]
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Dwarf::assemble {
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filename $asm_file
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add_dummy_cus 0
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} {
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global func_info_vars
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foreach var $func_info_vars {
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global $var
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}
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cu { label cu_label } {
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compile_unit {{language @DW_LANG_C}} {
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subprogram {
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{DW_AT_name _start}
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{DW_AT_low_pc $_start_start DW_FORM_addr}
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{DW_AT_high_pc $_start_end DW_FORM_addr}
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}
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}
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}
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tu { label tu_label } 0x8ece66f4224fddb3 "" {
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type_unit {} {
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declare_labels int_type
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structure_type {
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{name struct_with_int_member}
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{byte_size 4 sdata}
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} {
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member {
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{name member}
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{type :$int_type}
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}
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}
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int_type: base_type {
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{name int}
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{encoding @DW_ATE_signed}
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{byte_size 4 sdata}
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}
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}
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}
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debug_names {} {
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cu cu_label
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tu tu_label
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name _start subprogram cu_label 0xEDDB6232
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name struct_with_int_member structure_type tu_label 0x53A2AE86
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}
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}
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if [prepare_for_testing "failed to prepare" $testfile "${asm_file} ${srcfile}" \
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[list additional_flags=-nostartfiles]] {
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return -1
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}
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# Verify that .debug_names section is not ignored.
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set index [have_index $binfile]
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gdb_assert { [string equal $index "debug_names"] } ".debug_names used"
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# Verify that we can find the type in the type unit.
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set re \
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[multi_line \
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"type = struct struct_with_int_member {" \
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" int member;" \
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"}"]
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gdb_test "ptype struct struct_with_int_member" $re
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@ -1560,6 +1560,7 @@ namespace eval Dwarf {
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set _cu_is_fission 0
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set section ".debug_types"
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set _abbrev_section ".debug_abbrev"
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set label ""
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foreach { name value } $options {
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switch -exact -- $name {
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@ -1567,6 +1568,7 @@ namespace eval Dwarf {
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version { set _cu_version $value }
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addr_size { set _cu_addr_size $value }
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fission { set _cu_is_fission $value }
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label { set label $value }
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default { error "unknown option $name" }
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}
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}
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@ -1593,6 +1595,11 @@ namespace eval Dwarf {
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set start_label [_compute_label "cu${cu_num}_start"]
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set end_label [_compute_label "cu${cu_num}_end"]
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if { $label != "" } {
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upvar $label my_label
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set my_label $_cu_label
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}
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define_label $_cu_label
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if {$is_64} {
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_op .4byte 0xffffffff
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@ -2991,6 +2998,12 @@ namespace eval Dwarf {
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variable _debug_names_cus
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lappend _debug_names_cus $cu
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}
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variable _debug_names_tus
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set _debug_names_tus []
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proc _debug_names_tu { tu } {
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variable _debug_names_tus
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lappend _debug_names_tus $tu
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}
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variable _debug_names
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set _debug_names []
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proc _debug_names_name { name tag cu hash } {
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@ -2999,13 +3012,14 @@ namespace eval Dwarf {
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lappend _debug_names [list $name $tag $cu $hash $entry_pool_offset]
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}
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with_override Dwarf::cu Dwarf::_debug_names_cu {
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with_override Dwarf::tu Dwarf::_debug_names_tu {
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with_override Dwarf::name Dwarf::_debug_names_name {
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uplevel $body
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}}
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}}}
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# Header - CU / TU / foreign TU count.
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_op .4byte [llength $_debug_names_cus] "Comp_unit_count"
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_op .4byte 0 "Local_type_unit_count"
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_op .4byte [llength $_debug_names_tus] "Local_type_unit_count"
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_op .4byte 0 "Foreign_type_unit_count"
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# Header - bucket count.
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@ -3037,7 +3051,15 @@ namespace eval Dwarf {
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}
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# List of Local TUs.
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#
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set comment "TU offset"
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foreach tu $_debug_names_tus {
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upvar $tu tmp
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if { $is_64 } {
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_op .8byte $tmp $comment
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} else {
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_op .4byte $tmp $comment
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}
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}
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# List of Foreign TUs.
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#
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@ -3087,9 +3109,20 @@ namespace eval Dwarf {
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foreach idx $_debug_names {
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set name [lindex $idx 0]
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set tag [lindex $idx 1]
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set cu [lindex $idx 2]
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set cu_index [lsearch -exact $_debug_names_cus $cu]
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if { $cu_index == -1 } {
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set attr_name type_unit
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set attr_val 2
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} else {
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set attr_name compile_unit
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set attr_val 1
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}
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_op .byte $abbrev "abbrev $abbrev"
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_op .uleb128 $_constants(DW_TAG_$tag) "DW_TAG_$tag"
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_op .byte 1 "DW_IDX_compile_unit (attribute)"
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_op .byte $attr_val "DW_IDX_$attr_name (attribute)"
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_op .byte 0x0f "DW_FORM_udata (form)"
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_op .byte 0 "abbrev terminator (attribute)"
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_op .byte 0 "abbrev terminator (form)"
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@ -3105,17 +3138,16 @@ namespace eval Dwarf {
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set cu [lindex $idx 2]
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set label [lindex $idx 4]
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set cu_index 0
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foreach idx2 $_debug_names_cus {
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if { $idx2 == $cu } {
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break
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}
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incr cu_index
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set cu_index [lsearch -exact $_debug_names_cus $cu]
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if { $cu_index == -1 } {
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set cu_index [lsearch -exact $_debug_names_tus $cu]
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set comment "$name: TU index"
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} else {
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set comment "$name: CU index"
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}
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define_label $label
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_op .byte $abbrev "$name: abbrev"
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_op .uleb128 $cu_index "$name: CU index"
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_op .uleb128 $cu_index $comment
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_op .byte 0 "$name: terminator"
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incr abbrev
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}
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