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llvm-project/bolt/test/X86/dwarf5-df-debug-names.test
Alexander Yermolovich a4610c7182
[BOLT][DWARF] Add support for DW_IDX_parent (#85285) 
This adds support for DW_IDX_parent. If DIE has a parent then
DW_IDX_parent in Entry will point to Entry for that parent DIE.
Otherwise it will have DW_FORM_flag_present in abbrev. Which takes zero
space in Entry.

This came from

https://discourse.llvm.org/t/rfc-improve-dwarf-5-debug-names-type-lookup-parsing-speed/74151
2024-03-15 13:52:45 -07:00

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; RUN: rm -rf %t
; RUN: mkdir %t
; RUN: cd %t
; RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf5-df-debug-names-main.s \
; RUN: -split-dwarf-file=main.dwo -o main.o
; RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf5-df-debug-names-helper.s \
; RUN: -split-dwarf-file=helper.dwo -o helper.o
; RUN: %clang %cflags -gdwarf-5 -gsplit-dwarf=split main.o helper.o -o main.exe
; RUN: llvm-bolt main.exe -o main.exe.bolt --update-debug-sections
; RUN: llvm-dwarfdump --debug-info --debug-names main.exe.bolt > log.txt
; RUN: cat log.txt | FileCheck -check-prefix=BOLT %s
;; Tests that BOLT correctly generates .debug_names section with two CUs for split dwarf.
; BOLT: [[OFFSET:0x[0-9a-f]*]]: Compile Unit
; BOLT: [[OFFSET1:0x[0-9a-f]*]]: Compile Unit
; BOLT: Name Index @ 0x0 {
; BOLT-NEXT: Header {
; BOLT-NEXT: Length: 0xFC
; BOLT-NEXT: Format: DWARF32
; BOLT-NEXT: Version: 5
; BOLT-NEXT: CU count: 2
; BOLT-NEXT: Local TU count: 0
; BOLT-NEXT: Foreign TU count: 0
; BOLT-NEXT: Bucket count: 7
; BOLT-NEXT: Name count: 7
; BOLT-NEXT: Abbreviations table size: 0x29
; BOLT-NEXT: Augmentation: 'BOLT'
; BOLT-NEXT: }
; BOLT-NEXT: Compilation Unit offsets [
; BOLT-NEXT: CU[0]: [[OFFSET]]
; BOLT-NEXT: CU[1]: [[OFFSET1]]
; BOLT-NEXT: ]
; BOLT-NEXT: Abbreviations [
; BOLT-NEXT: Abbreviation [[ABBREV1:0x[0-9a-f]*]] {
; BOLT-NEXT: Tag: DW_TAG_structure_type
; BOLT-NEXT: DW_IDX_compile_unit: DW_FORM_data1
; BOLT-NEXT: DW_IDX_die_offset: DW_FORM_ref4
; BOLT-NEXT: DW_IDX_parent: DW_FORM_flag_present
; BOLT-NEXT: }
; BOLT-NEXT: Abbreviation [[ABBREV2:0x[0-9a-f]*]] {
; BOLT-NEXT: Tag: DW_TAG_base_type
; BOLT-NEXT: DW_IDX_compile_unit: DW_FORM_data1
; BOLT-NEXT: DW_IDX_die_offset: DW_FORM_ref4
; BOLT-NEXT: DW_IDX_parent: DW_FORM_flag_present
; BOLT-NEXT: }
; BOLT-NEXT: Abbreviation [[ABBREV3:0x[0-9a-f]*]] {
; BOLT-NEXT: Tag: DW_TAG_variable
; BOLT-NEXT: DW_IDX_compile_unit: DW_FORM_data1
; BOLT-NEXT: DW_IDX_die_offset: DW_FORM_ref4
; BOLT-NEXT: DW_IDX_parent: DW_FORM_flag_present
; BOLT-NEXT: }
; BOLT-NEXT: Abbreviation [[ABBREV4:0x[0-9a-f]*]] {
; BOLT-NEXT: Tag: DW_TAG_subprogram
; BOLT-NEXT: DW_IDX_compile_unit: DW_FORM_data1
; BOLT-NEXT: DW_IDX_die_offset: DW_FORM_ref4
; BOLT-NEXT: DW_IDX_parent: DW_FORM_flag_present
; BOLT-NEXT: }
; BOLT-NEXT: ]
; BOLT-NEXT: Bucket 0 [
; BOLT-NEXT: EMPTY
; BOLT-NEXT: ]
; BOLT-NEXT: Bucket 1 [
; BOLT-NEXT: Name 1 {
; BOLT-NEXT: Hash: 0x7C96E4DB
; BOLT-NEXT: String: {{.+}} "Foo2"
; BOLT-NEXT: Entry @ {{.+}} {
; BOLT-NEXT: Abbrev: [[ABBREV1]]
; BOLT-NEXT: Tag: DW_TAG_structure_type
; BOLT-NEXT: DW_IDX_compile_unit: 0x00
; BOLT-NEXT: DW_IDX_die_offset: 0x00000068
; BOLT-NEXT: DW_IDX_parent: <parent not indexed>
; BOLT-NEXT: }
; BOLT-NEXT: }
; BOLT-NEXT: ]
; BOLT-NEXT: Bucket 2 [
; BOLT-NEXT: Name 2 {
; BOLT-NEXT: Hash: 0xBA564846
; BOLT-NEXT: String: {{.+}} "Foo2Int"
; BOLT-NEXT: Entry @ {{.+}} {
; BOLT-NEXT: Abbrev: [[ABBREV1]]
; BOLT-NEXT: Tag: DW_TAG_structure_type
; BOLT-NEXT: DW_IDX_compile_unit: 0x01
; BOLT-NEXT: DW_IDX_die_offset: 0x00000025
; BOLT-NEXT: DW_IDX_parent: <parent not indexed>
; BOLT-NEXT: }
; BOLT-NEXT: }
; BOLT-NEXT: ]
; BOLT-NEXT: Bucket 3 [
; BOLT-NEXT: Name 3 {
; BOLT-NEXT: Hash: 0xB888030
; BOLT-NEXT: String: {{.+}} "int"
; BOLT-NEXT: Entry @ {{.+}} {
; BOLT-NEXT: Abbrev: [[ABBREV2]]
; BOLT-NEXT: Tag: DW_TAG_base_type
; BOLT-NEXT: DW_IDX_compile_unit: 0x01
; BOLT-NEXT: DW_IDX_die_offset: 0x00000043
; BOLT-NEXT: DW_IDX_parent: <parent not indexed>
; BOLT-NEXT: }
; BOLT-NEXT: Entry @ {{.+}} {
; BOLT-NEXT: Abbrev: [[ABBREV2]]
; BOLT-NEXT: Tag: DW_TAG_base_type
; BOLT-NEXT: DW_IDX_compile_unit: 0x00
; BOLT-NEXT: DW_IDX_die_offset: 0x00000056
; BOLT-NEXT: DW_IDX_parent: <parent not indexed>
; BOLT-NEXT: }
; BOLT-NEXT: }
; BOLT-NEXT: Name 4 {
; BOLT-NEXT: Hash: 0xF73809C
; BOLT-NEXT: String: {{.+}} "Foo2a"
; BOLT-NEXT: Entry @ {{.+}} {
; BOLT-NEXT: Abbrev: [[ABBREV1]]
; BOLT-NEXT: Tag: DW_TAG_structure_type
; BOLT-NEXT: DW_IDX_compile_unit: 0x00
; BOLT-NEXT: DW_IDX_die_offset: 0x00000078
; BOLT-NEXT: DW_IDX_parent: <parent not indexed>
; BOLT-NEXT: }
; BOLT-NEXT: }
; BOLT-NEXT: Name 5 {
; BOLT-NEXT: Hash: 0x7C96CB76
; BOLT-NEXT: String: {{.+}} "fint"
; BOLT-NEXT: Entry @ {{.+}} {
; BOLT-NEXT: Abbrev: [[ABBREV3]]
; BOLT-NEXT: Tag: DW_TAG_variable
; BOLT-NEXT: DW_IDX_compile_unit: 0x01
; BOLT-NEXT: DW_IDX_die_offset: 0x0000001a
; BOLT-NEXT: DW_IDX_parent: <parent not indexed>
; BOLT-NEXT: }
; BOLT-NEXT: }
; BOLT-NEXT: Name 6 {
; BOLT-NEXT: Hash: 0x7C9A7F6A
; BOLT-NEXT: String: {{.+}} "main"
; BOLT-NEXT: Entry @ {{.+}} {
; BOLT-NEXT: Abbrev: [[ABBREV4]]
; BOLT-NEXT: Tag: DW_TAG_subprogram
; BOLT-NEXT: DW_IDX_compile_unit: 0x00
; BOLT-NEXT: DW_IDX_die_offset: 0x0000001a
; BOLT-NEXT: DW_IDX_parent: <parent not indexed>
; BOLT-NEXT: }
; BOLT-NEXT: }
; BOLT-NEXT: ]
; BOLT-NEXT: Bucket 4 [
; BOLT-NEXT: EMPTY
; BOLT-NEXT: ]
; BOLT-NEXT: Bucket 5 [
; BOLT-NEXT: Name 7 {
; BOLT-NEXT: Hash: 0x7C952063
; BOLT-NEXT: String: {{.+}} "char"
; BOLT-NEXT: Entry @ {{.+}} {
; BOLT-NEXT: Abbrev: [[ABBREV2]]
; BOLT-NEXT: Tag: DW_TAG_base_type
; BOLT-NEXT: DW_IDX_compile_unit: 0x00
; BOLT-NEXT: DW_IDX_die_offset: 0x00000064
; BOLT-NEXT: DW_IDX_parent: <parent not indexed>
; BOLT-NEXT: }
; BOLT-NEXT: }
; BOLT-NEXT: ]
; BOLT-NEXT: Bucket 6 [
; BOLT-NEXT: EMPTY
; BOLT-NEXT: ]
; BOLT-NEXT: }
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