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Differential D84008 Diff 280125 llvm/test/tools/yaml2obj/ELF/DWARF/debug-info.yaml

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llvm/test/tools/yaml2obj/ELF/DWARF/debug-info.yaml

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DWARF: DWARF:
debug_info: debug_info:
- Format: DWARF64 - Format: DWARF64
Length: 0x0c Length: 0x0c
Version: 4 Version: 4
AbbrOffset: 0x1234 AbbrOffset: 0x1234
AddrSize: 8 AddrSize: 8
Entries: [] Entries: []
## k) Test that yaml2obj is able to emit a correct length for compilation units.
# RUN: yaml2obj --docnum=13 %s -o %t13.o
# RUN: llvm-readelf --hex-dump=.debug_info %t13.o | \
# RUN: FileCheck %s --check-prefix=INFER-LENGTH
jhendersonUnsubmitted
Done
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Should this be INFER-LENGTH? (The test is currently failing...)

jhenderson: Should this be INFER-LENGTH? (The test is currently failing...)
HiguoxingAuthorUnsubmitted
Done
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Oops, sorry, I forget to modify this line.

Higuoxing: Oops, sorry, I forget to modify this line.
# INFER-LENGTH: Hex dump of section '.debug_info':
# INFER-LENGTH-NEXT: 0x00000000 37000000 04000000 00000801 00000000 7...............
## ^------- unit_length (0x37)
## ^--- version (2-byte)
## ^-------- debug_abbrev_offset (4-byte)
## ^- address_size (1-byte)
jhendersonUnsubmitted
Done
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I don't think these comments are particularly helpful, since they can be inferred from the byte-count/offset at the start of the line. I think if you want comments, you should say what the bytes represent, like you do elsewhere.

jhenderson: I don't think these comments are particularly helpful, since they can be inferred from the byte…
## ^- abbrev code (ULEB128) 0x01
## ^------- Form: DW_FORM_strp (4-byte)
# INFER-LENGTH-NEXT: 0x00000010 0c001600 00000000 00001e00 00002011 .............. .
## ^--- Form: DW_FORM_data2 (2-byte)
## ^-------- Form: DW_FORM_strp (4-byte)
## ^-------- Form: DW_FORM_sec_offset (4-byte)
## ^-------- Form: DW_FORM_strp (4-byte)
## ^--- Form: DW_FORM_addr (8-byte)
# INFER-LENGTH-NEXT: 0x00000020 00000000 00003300 00000220 11000000 ......3.... ....
## -------------
## ^-------- Form: DW_FORM_data4 (4-byte)
## ^- abbrev code (ULEB128) 0x02
## ^---------- Form: DW_FORM_addr (8-byte)
# INFER-LENGTH-NEXT: 0x00000030 00000006 00000038 000000 .......8...
## ------
## ^-------- Form: DW_FORM_data4 (4-byte)
## ^-------- Form: DW_FORM_strp (4-byte)
## The handwritten DIEs should look like:
## 0x0000000b: DW_TAG_compile_unit [1] *
## DW_AT_producer [DW_FORM_strp] ( .debug_str[0x00000000] = "clang version 10.0.0 ")
## DW_AT_language [DW_FORM_data2] (DW_LANG_C99)
## DW_AT_name [DW_FORM_strp] ( .debug_str[0x00000016] = "hello.c")
## DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
## DW_AT_comp_dir [DW_FORM_strp] ( .debug_str[0x0000001e] = "/home/v/x/llvm/playground")
## DW_AT_low_pc [DW_FORM_addr] (0x0000000000001120)
## DW_AT_high_pc [DW_FORM_data4] (0x00000033)
##
## 0x0000002a: DW_TAG_subprogram [2]
## DW_AT_low_pc [DW_FORM_addr] (0x0000000000001120)
## DW_AT_high_pc [DW_FORM_data4] (0x00000006)
## DW_AT_name [DW_FORM_strp] ( .debug_str[0x00000038] = "main")
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_EXEC
Machine: EM_X86_64
DWARF:
debug_str:
- "clang version 10.0.0 "
- "hello.c"
- "/home/v/x/llvm/playground"
- "main"
debug_abbrev:
- Code: 1
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_producer
Form: DW_FORM_strp
- Attribute: DW_AT_language
Form: DW_FORM_data2
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_stmt_list
Form: DW_FORM_sec_offset
- Attribute: DW_AT_comp_dir
Form: DW_FORM_strp
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_data4
- Code: 2
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_data4
- Attribute: DW_AT_name
Form: DW_FORM_strp
debug_info:
- Version: 4
AbbrOffset: 0x00
AddrSize: 0x08
Entries:
- AbbrCode: 1
Values:
- Value: 0x00 ## DW_AT_producer [DW_FORM_strp]
- Value: 0x0c ## DW_LANG_C99, DW_AT_language [DW_FORM_data2]
- Value: 0x16 ## DW_AT_name [DW_FORM_strp]
- Value: 0x00 ## DW_AT_stmt_list [DW_FORM_sec_offset]
- Value: 0x1e ## DW_AT_comp_dir [DW_FORM_strp]
- Value: 0x1120 ## DW_AT_low_pc [DW_FORM_addr]
- Value: 0x33 ## DW_AT_high_pc [DW_FORM_data4]
- AbbrCode: 2
Values:
- Value: 0x1120 ## DW_AT_low_pc [DW_FORM_addr]
- Value: 0x06 ## DW_AT_high_pc [DW_FORM_data4]
- Value: 0x38 ## DW_AT_name [DW_FORM_strp]