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Differential D129828

[BOLT][DWARF] Fix incorrect DW_AT_type offset for unittest
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Authored by zr33 on Jul 14 2022, 8:56 PM.

Details

Reviewers
rafauler
Amir
ayermolo
maksfb
Commits
rG1a1324a303f8: [BOLT][DWARF] Fix incorrect DW_AT_type offset for unittest
Summary

Some unit tests has incorrect DW_AT_type offset since they are manual crafted, fix them to the correct offset.

Diff Detail

Event Timeline

zr33 created this revision.Jul 14 2022, 8:56 PM
Herald added a reviewer: rafauler. · View Herald TranscriptJul 14 2022, 8:56 PM
Herald added a reviewer: Amir. · View Herald Transcript
Herald added a reviewer: maksfb. · View Herald Transcript
Herald added a project: Restricted Project. · View Herald Transcript
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zr33 requested review of this revision.Jul 14 2022, 8:56 PM
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zr33 retitled this revision from fix incorrect DW_AT_type offset for unittest to [BOLT][DWARF] Fix incorrect DW_AT_type offset for unittest.Jul 14 2022, 8:59 PM
zr33 edited the summary of this revision. (Show Details)
zr33 edited reviewers, added: ayermolo; removed: maksfb.
Herald added a reviewer: maksfb. · View Herald TranscriptJul 14 2022, 8:59 PM
Harbormaster completed remote builds in B175557: Diff 444868.Jul 14 2022, 9:03 PM
ayermolo accepted this revision.Jul 15 2022, 10:19 AM
This revision is now accepted and ready to land.Jul 15 2022, 10:19 AM
Amir added a comment.EditedJul 15 2022, 11:29 AM

Some general questions:
Why are tests incorrect? Were they generated by a buggy clang version? How do we know they are correct now?

ayermolo added a comment.Jul 15 2022, 11:38 AM
In D129828#3655934, @Amir wrote:

Some general questions:
Why are tests incorrect? Were they generated by a buggy clang version? How do we know they are correct now?

It's my fault. From what I remember I manually modified them.

zr33 added a comment.Jul 15 2022, 11:54 AM
In D129828#3655934, @Amir wrote:

Some general questions:
Why are tests incorrect? Were they generated by a buggy clang version? How do we know they are correct now?

Thanks for you questions!

The clang version is clang version 15.0.0.
These tests are manual edit at beginning , when I pass them to my IR constructor, I found some reference offset in them are incorrect so IR construction process failed.
For example, debug information in the pre-bolt binary bolt/test/X86/high_pc_udata.s like following,

.debug_info contents:
0x00000000: Compile Unit: length = 0x00000044, format = DWARF32, version = 0x0004, abbr_offset = 0x0000, addr_size = 0x08 (next unit at 0x00000048)

0x0000000b: DW_TAG_compile_unit [1] *
              DW_AT_producer [DW_FORM_strp]     ( .debug_str[0x00000009] = "clang")
              DW_AT_language [DW_FORM_data2]    (DW_LANG_C_plus_plus_14)
              DW_AT_stmt_list [DW_FORM_sec_offset]      (0x00000000)
              DW_AT_comp_dir [DW_FORM_strp]     ( .debug_str[0x0000000f] = "test")
              DW_AT_low_pc [DW_FORM_addr]       (0x00000000000012f0)
              DW_AT_high_pc [DW_FORM_udata]     (15)
              DW_AT_name [DW_FORM_strp] ( .debug_str[0x00000000] = "main.cpp")

0x00000027:   DW_TAG_subprogram [2]
                DW_AT_low_pc [DW_FORM_addr]     (0x00000000000012f0)
                DW_AT_high_pc [DW_FORM_data4]   (0x0000000f)
                DW_AT_frame_base [DW_FORM_exprloc]      (DW_OP_reg6 RBP)
                DW_AT_name [DW_FORM_strp]       ( .debug_str[0x00000014] = "main")
                DW_AT_decl_file [DW_FORM_data1] ("test/main.cpp")
                DW_AT_decl_line [DW_FORM_data1] (1)
                DW_AT_type [DW_FORM_ref4]       (cu + 0x0043 => {0x00000043})
                DW_AT_external [DW_FORM_flag_present]   (true)

0x00000040:   DW_TAG_base_type [3]
                DW_AT_name [DW_FORM_strp]       ( .debug_str[0x00000019] = "int")
                DW_AT_encoding [DW_FORM_data1]  (DW_ATE_signed)
                DW_AT_byte_size [DW_FORM_data1] (0x04)

0x00000047:   NULL

DW_AT_type [DW_FORM_ref4] (cu + 0x0043 => {0x00000043}) at Entry 0x00000027 does not refer to any entry. Ideally, it should point to 0x00000040 which is the entry for int

There are same situations happened for other patched tests.

After I patch it, it looks good as following,

.debug_info contents:
0x00000000: Compile Unit: length = 0x00000044, format = DWARF32, version = 0x0004, abbr_offset = 0x0000, addr_size = 0x08 (next unit at 0x00000048)

0x0000000b: DW_TAG_compile_unit [1] *
              DW_AT_producer [DW_FORM_strp]     ( .debug_str[0x00000009] = "clang")
              DW_AT_language [DW_FORM_data2]    (DW_LANG_C_plus_plus_14)
              DW_AT_stmt_list [DW_FORM_sec_offset]      (0x00000000)
              DW_AT_comp_dir [DW_FORM_strp]     ( .debug_str[0x0000000f] = "test")
              DW_AT_low_pc [DW_FORM_addr]       (0x00000000000012f0)
              DW_AT_high_pc [DW_FORM_udata]     (15)
              DW_AT_name [DW_FORM_strp] ( .debug_str[0x00000000] = "main.cpp")

0x00000027:   DW_TAG_subprogram [2]
                DW_AT_low_pc [DW_FORM_addr]     (0x00000000000012f0)
                DW_AT_high_pc [DW_FORM_data4]   (0x0000000f)
                DW_AT_frame_base [DW_FORM_exprloc]      (DW_OP_reg6 RBP)
                DW_AT_name [DW_FORM_strp]       ( .debug_str[0x00000014] = "main")
                DW_AT_decl_file [DW_FORM_data1] ("test/main.cpp")
                DW_AT_decl_line [DW_FORM_data1] (1)
                DW_AT_type [DW_FORM_ref4]       (cu + 0x0040 => {0x00000040} "int")
                DW_AT_external [DW_FORM_flag_present]   (true)

0x00000040:   DW_TAG_base_type [3]
                DW_AT_name [DW_FORM_strp]       ( .debug_str[0x00000019] = "int")
                DW_AT_encoding [DW_FORM_data1]  (DW_ATE_signed)
                DW_AT_byte_size [DW_FORM_data1] (0x04)

0x00000047:   NULL

The patched tests can pass both current test and my IR constructor (the IR constructor have check for reference destination, if invalid, it will failed), so I consider they are correct now.

Amir added a comment.Jul 15 2022, 12:43 PM

@zr33 @ayermolo thank you for clarifications.
@zr33: would you mind adding a brief explanation to the summary?

zr33 edited the summary of this revision. (Show Details)Jul 15 2022, 2:36 PM
Amir accepted this revision.Jul 15 2022, 2:53 PM

Thanks

Closed by commit rG1a1324a303f8: [BOLT][DWARF] Fix incorrect DW_AT_type offset for unittest (authored by zr33, committed by ayermolo). · Explain WhyJul 18 2022, 2:22 PM
This revision was automatically updated to reflect the committed changes.
ayermolo added a commit: rG1a1324a303f8: [BOLT][DWARF] Fix incorrect DW_AT_type offset for unittest.

Revision Contents

Diff 445625

bolt/test/X86/Inputs/dwarf4-split-dwarf-no-address-helper.s

Show First 20 Lines • Show All 105 Lines • ▼ Show 20 Lines.Ldebug_info_dwo_start0:
.quad 2738718332032343034 # DW_AT_GNU_dwo_id .quad 2738718332032343034 # DW_AT_GNU_dwo_id
.byte 2 # Abbrev [2] 0x19:0x1c DW_TAG_subprogram .byte 2 # Abbrev [2] 0x19:0x1c DW_TAG_subprogram
.byte 1 # DW_AT_frame_base .byte 1 # DW_AT_frame_base
.byte 86 .byte 86
.byte 0 # DW_AT_linkage_name .byte 0 # DW_AT_linkage_name
.byte 1 # DW_AT_name .byte 1 # DW_AT_name
.byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line .byte 1 # DW_AT_decl_line
.long 53 # DW_AT_type .long 48 # DW_AT_type
# DW_AT_external # DW_AT_external
.byte 3 # Abbrev [3] 0x29:0xb DW_TAG_formal_parameter .byte 3 # Abbrev [3] 0x29:0xb DW_TAG_formal_parameter
.byte 2 # DW_AT_location .byte 2 # DW_AT_location
.byte 145 .byte 145
.byte 124 .byte 124
.byte 3 # DW_AT_name .byte 3 # DW_AT_name
.byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line .byte 1 # DW_AT_decl_line
.long 53 # DW_AT_type .long 48 # DW_AT_type
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.byte 4 # Abbrev [4] 0x35:0x4 DW_TAG_base_type .byte 4 # Abbrev [4] 0x35:0x4 DW_TAG_base_type
.byte 2 # DW_AT_name .byte 2 # DW_AT_name
.byte 5 # DW_AT_encoding .byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size .byte 4 # DW_AT_byte_size
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.Ldebug_info_dwo_end0: .Ldebug_info_dwo_end0:
.section .debug_abbrev.dwo,"e",@progbits .section .debug_abbrev.dwo,"e",@progbits
▲ Show 20 Lines • Show All 91 Lines • Show Last 20 Lines

bolt/test/X86/Inputs/dwarf5-loclist-offset-form-helper.s

Show First 20 Lines • Show All 283 Lines • ▼ Show 20 Lines.Ldebug_info_start0:
.long .Lstr_offsets_base0 # DW_AT_str_offsets_base .long .Lstr_offsets_base0 # DW_AT_str_offsets_base
.long .Lline_table_start0 # DW_AT_stmt_list .long .Lline_table_start0 # DW_AT_stmt_list
.byte 2 # DW_AT_comp_dir .byte 2 # DW_AT_comp_dir
.byte 1 # DW_AT_low_pc .byte 1 # DW_AT_low_pc
.long .Lfunc_end1-.Lfunc_begin0 # DW_AT_high_pc .long .Lfunc_end1-.Lfunc_begin0 # DW_AT_high_pc
.long .Laddr_table_base0 # DW_AT_addr_base .long .Laddr_table_base0 # DW_AT_addr_base
.byte 2 # Abbrev [2] 0x27:0xb DW_TAG_variable .byte 2 # Abbrev [2] 0x27:0xb DW_TAG_variable
.byte 3 # DW_AT_name .byte 3 # DW_AT_name
.long 50 # DW_AT_type .long 46 # DW_AT_type
# DW_AT_external # DW_AT_external
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line .byte 1 # DW_AT_decl_line
.byte 2 # DW_AT_location .byte 2 # DW_AT_location
.byte 161 .byte 161
.byte 0 .byte 0
.byte 3 # Abbrev [3] 0x32:0x4 DW_TAG_base_type .byte 3 # Abbrev [3] 0x32:0x4 DW_TAG_base_type
.byte 4 # DW_AT_name .byte 4 # DW_AT_name
.byte 5 # DW_AT_encoding .byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size .byte 4 # DW_AT_byte_size
.byte 4 # Abbrev [4] 0x36:0x14 DW_TAG_subprogram .byte 4 # Abbrev [4] 0x36:0x14 DW_TAG_subprogram
.byte 1 # DW_AT_low_pc .byte 1 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base .byte 1 # DW_AT_frame_base
.byte 87 .byte 87
# DW_AT_call_all_calls # DW_AT_call_all_calls
.long 74 # DW_AT_abstract_origin .long 70 # DW_AT_abstract_origin
.byte 5 # Abbrev [5] 0x42:0x7 DW_TAG_formal_parameter .byte 5 # Abbrev [5] 0x42:0x7 DW_TAG_formal_parameter
.byte 1 # DW_AT_location .byte 1 # DW_AT_location
.byte 85 .byte 85
.long 79 # DW_AT_abstract_origin .long 75 # DW_AT_abstract_origin
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.byte 6 # Abbrev [6] 0x4a:0xe DW_TAG_subprogram .byte 6 # Abbrev [6] 0x4a:0xe DW_TAG_subprogram
.byte 5 # DW_AT_linkage_name .byte 5 # DW_AT_linkage_name
.byte 6 # DW_AT_name .byte 6 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 2 # DW_AT_decl_line .byte 2 # DW_AT_decl_line
# DW_AT_external # DW_AT_external
# DW_AT_inline # DW_AT_inline
.byte 7 # Abbrev [7] 0x4f:0x8 DW_TAG_formal_parameter .byte 7 # Abbrev [7] 0x4f:0x8 DW_TAG_formal_parameter
.byte 7 # DW_AT_name .byte 7 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 2 # DW_AT_decl_line .byte 2 # DW_AT_decl_line
.long 88 # DW_AT_type .long 84 # DW_AT_type
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.byte 8 # Abbrev [8] 0x58:0x5 DW_TAG_pointer_type .byte 8 # Abbrev [8] 0x58:0x5 DW_TAG_pointer_type
.long 50 # DW_AT_type .long 46 # DW_AT_type
.byte 9 # Abbrev [9] 0x5d:0x31 DW_TAG_subprogram .byte 9 # Abbrev [9] 0x5d:0x31 DW_TAG_subprogram
.byte 2 # DW_AT_low_pc .byte 2 # DW_AT_low_pc
.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc .long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base .byte 1 # DW_AT_frame_base
.byte 87 .byte 87
# DW_AT_call_all_calls # DW_AT_call_all_calls
.byte 8 # DW_AT_linkage_name .byte 8 # DW_AT_linkage_name
.byte 9 # DW_AT_name .byte 9 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 6 # DW_AT_decl_line .byte 6 # DW_AT_decl_line
.long 50 # DW_AT_type .long 46 # DW_AT_type
# DW_AT_external # DW_AT_external
.byte 10 # Abbrev [10] 0x6d:0xa DW_TAG_formal_parameter .byte 10 # Abbrev [10] 0x6d:0xa DW_TAG_formal_parameter
.byte 1 # DW_AT_location .byte 1 # DW_AT_location
.byte 85 .byte 85
.byte 10 # DW_AT_name .byte 10 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 6 # DW_AT_decl_line .byte 6 # DW_AT_decl_line
.long 50 # DW_AT_type .long 46 # DW_AT_type
.byte 11 # Abbrev [11] 0x77:0x9 DW_TAG_variable .byte 11 # Abbrev [11] 0x77:0x9 DW_TAG_variable
.long .Ldebug_loc0 # DW_AT_location .long .Ldebug_loc0 # DW_AT_location
.byte 7 # DW_AT_name .byte 7 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 7 # DW_AT_decl_line .byte 7 # DW_AT_decl_line
.long 50 # DW_AT_type .long 46 # DW_AT_type
.byte 12 # Abbrev [12] 0x80:0xd DW_TAG_inlined_subroutine .byte 12 # Abbrev [12] 0x80:0xd DW_TAG_inlined_subroutine
.long 74 # DW_AT_abstract_origin .long 70 # DW_AT_abstract_origin
.byte 2 # DW_AT_low_pc .byte 2 # DW_AT_low_pc
.long .Ltmp1-.Lfunc_begin1 # DW_AT_high_pc .long .Ltmp1-.Lfunc_begin1 # DW_AT_high_pc
.byte 0 # DW_AT_call_file .byte 0 # DW_AT_call_file
.byte 8 # DW_AT_call_line .byte 8 # DW_AT_call_line
.byte 5 # DW_AT_call_column .byte 5 # DW_AT_call_column
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.Ldebug_info_end0: .Ldebug_info_end0:
▲ Show 20 Lines • Show All 56 Lines • Show Last 20 Lines

bolt/test/X86/Inputs/dwarf5-loclist-offset-form-main.s

Show First 20 Lines • Show All 261 Lines • ▼ Show 20 Lines.Ldebug_info_start0:
.byte 1 # DW_AT_decl_line .byte 1 # DW_AT_decl_line
# DW_AT_external # DW_AT_external
.byte 3 # Abbrev [3] 0x33:0xa DW_TAG_formal_parameter .byte 3 # Abbrev [3] 0x33:0xa DW_TAG_formal_parameter
.byte 1 # DW_AT_location .byte 1 # DW_AT_location
.byte 85 .byte 85
.byte 7 # DW_AT_name .byte 7 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line .byte 1 # DW_AT_decl_line
.long 130 # DW_AT_type .long 132 # DW_AT_type
.byte 3 # Abbrev [3] 0x3d:0xa DW_TAG_formal_parameter .byte 3 # Abbrev [3] 0x3d:0xa DW_TAG_formal_parameter
.byte 1 # DW_AT_location .byte 1 # DW_AT_location
.byte 84 .byte 84
.byte 8 # DW_AT_name .byte 8 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line .byte 1 # DW_AT_decl_line
.long 130 # DW_AT_type .long 132 # DW_AT_type
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.byte 4 # Abbrev [4] 0x48:0x36 DW_TAG_subprogram .byte 4 # Abbrev [4] 0x48:0x36 DW_TAG_subprogram
.byte 1 # DW_AT_low_pc .byte 1 # DW_AT_low_pc
.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc .long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base .byte 1 # DW_AT_frame_base
.byte 87 .byte 87
# DW_AT_call_all_calls # DW_AT_call_all_calls
.byte 5 # DW_AT_name .byte 5 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 7 # DW_AT_decl_line .byte 7 # DW_AT_decl_line
.long 126 # DW_AT_type .long 128 # DW_AT_type
# DW_AT_external # DW_AT_external
.byte 3 # Abbrev [3] 0x57:0xa DW_TAG_formal_parameter .byte 3 # Abbrev [3] 0x57:0xa DW_TAG_formal_parameter
.byte 1 # DW_AT_location .byte 1 # DW_AT_location
.byte 85 .byte 85
.byte 9 # DW_AT_name .byte 9 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 7 # DW_AT_decl_line .byte 7 # DW_AT_decl_line
.long 126 # DW_AT_type .long 128 # DW_AT_type
.byte 3 # Abbrev [3] 0x61:0xa DW_TAG_formal_parameter .byte 3 # Abbrev [3] 0x61:0xa DW_TAG_formal_parameter
.byte 1 # DW_AT_location .byte 1 # DW_AT_location
.byte 84 .byte 84
.byte 10 # DW_AT_name .byte 10 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 7 # DW_AT_decl_line .byte 7 # DW_AT_decl_line
.long 135 # DW_AT_type .long 137 # DW_AT_type
.byte 5 # Abbrev [5] 0x6b:0x9 DW_TAG_variable .byte 5 # Abbrev [5] 0x6b:0x9 DW_TAG_variable
.long .Ldebug_loc0 # DW_AT_location .long .Ldebug_loc0 # DW_AT_location
.byte 7 # DW_AT_name .byte 7 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 8 # DW_AT_decl_line .byte 8 # DW_AT_decl_line
.long 126 # DW_AT_type .long 128 # DW_AT_type
.byte 5 # Abbrev [5] 0x74:0x9 DW_TAG_variable .byte 5 # Abbrev [5] 0x74:0x9 DW_TAG_variable
.long .Ldebug_loc1 # DW_AT_location .long .Ldebug_loc1 # DW_AT_location
.byte 8 # DW_AT_name .byte 8 # DW_AT_name
.byte 0 # DW_AT_decl_file .byte 0 # DW_AT_decl_file
.byte 9 # DW_AT_decl_line .byte 9 # DW_AT_decl_line
.long 126 # DW_AT_type .long 128 # DW_AT_type
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.byte 6 # Abbrev [6] 0x7e:0x4 DW_TAG_base_type .byte 6 # Abbrev [6] 0x7e:0x4 DW_TAG_base_type
.byte 6 # DW_AT_name .byte 6 # DW_AT_name
.byte 5 # DW_AT_encoding .byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size .byte 4 # DW_AT_byte_size
.byte 7 # Abbrev [7] 0x82:0x5 DW_TAG_pointer_type .byte 7 # Abbrev [7] 0x82:0x5 DW_TAG_pointer_type
.long 126 # DW_AT_type .long 128 # DW_AT_type
.byte 7 # Abbrev [7] 0x87:0x5 DW_TAG_pointer_type .byte 7 # Abbrev [7] 0x87:0x5 DW_TAG_pointer_type
.long 140 # DW_AT_type .long 142 # DW_AT_type
.byte 7 # Abbrev [7] 0x8c:0x5 DW_TAG_pointer_type .byte 7 # Abbrev [7] 0x8c:0x5 DW_TAG_pointer_type
.long 145 # DW_AT_type .long 147 # DW_AT_type
.byte 6 # Abbrev [6] 0x91:0x4 DW_TAG_base_type .byte 6 # Abbrev [6] 0x91:0x4 DW_TAG_base_type
.byte 11 # DW_AT_name .byte 11 # DW_AT_name
.byte 6 # DW_AT_encoding .byte 6 # DW_AT_encoding
.byte 1 # DW_AT_byte_size .byte 1 # DW_AT_byte_size
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.Ldebug_info_end0: .Ldebug_info_end0:
.section .debug_str_offsets,"",@progbits .section .debug_str_offsets,"",@progbits
.long 52 # Length of String Offsets Set .long 52 # Length of String Offsets Set
▲ Show 20 Lines • Show All 56 Lines • Show Last 20 Lines

bolt/test/X86/high_pc_udata.s

Show First 20 Lines • Show All 118 Lines • ▼ Show 20 Lines.Ldebug_info_start0:
.byte 2 # Abbrev [2] 0x2a:0x19 DW_TAG_subprogram .byte 2 # Abbrev [2] 0x2a:0x19 DW_TAG_subprogram
.quad .Lfunc_begin0 # DW_AT_low_pc .quad .Lfunc_begin0 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base .byte 1 # DW_AT_frame_base
.byte 86 .byte 86
.long .Linfo_string3 # DW_AT_name .long .Linfo_string3 # DW_AT_name
.byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line .byte 1 # DW_AT_decl_line
.long 67 # DW_AT_type .long 64 # DW_AT_type
# DW_AT_external # DW_AT_external
.byte 3 # Abbrev [3] 0x43:0x7 DW_TAG_base_type .byte 3 # Abbrev [3] 0x43:0x7 DW_TAG_base_type
.long .Linfo_string4 # DW_AT_name .long .Linfo_string4 # DW_AT_name
.byte 5 # DW_AT_encoding .byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size .byte 4 # DW_AT_byte_size
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.Ldebug_info_end0: .Ldebug_info_end0:
.section .debug_str,"MS",@progbits,1 .section .debug_str,"MS",@progbits,1
Show All 15 Lines