4539b44148
This patch implements proposal https://lists.llvm.org/pipermail/llvm-dev/2020-August/144579.html llvm-dwarfutil - is a tool that is used for processing debug info(DWARF) located in built binary files to improve debug info quality, reduce debug info size. The patch currently implements smaller set of command-line options(comparing to the proposal): ``` ./llvm-dwarfutil [options] <input file> <output file> --garbage-collection Do garbage collection for debug info(default) -j <value> Alias for --num-threads --no-garbage-collection Don`t do garbage collection for debug info --no-odr-deduplication Don`t do ODR deduplication for debug types --no-odr Alias for --no-odr-deduplication --no-separate-debug-file Create single output file, containing debug tables(default) --num-threads <threads> Number of available threads for multi-threaded execution. Defaults to the number of cores on the current machine --odr-deduplication Do ODR deduplication for debug types(default) --odr Alias for --odr-deduplication --separate-debug-file Create two output files: file w/o debug tables and file with debug tables --tombstone [bfd,maxpc,exec,universal] Tombstone value used as a marker of invalid address(default: universal) =bfd - Zero for all addresses and [1,1] for DWARF v4 (or less) address ranges and exec =maxpc - Minus 1 for all addresses and minus 2 for DWARF v4 (or less) address ranges =exec - Match with address ranges of executable sections =universal - Both: bfd and maxpc ``` Reviewed By: clayborg Differential Revision: https://reviews.llvm.org/D86539
151 lines
4.2 KiB
Plaintext
151 lines
4.2 KiB
Plaintext
## This test checks that debug info related to deleted code (marked with
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## tombstone=exec) is removed.
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# RUN: yaml2obj %s -o %t.o
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# RUN: llvm-dwarfutil --tombstone=exec --garbage-collection %t.o - | llvm-dwarfdump -a - | FileCheck %s
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# RUN: llvm-dwarfutil --tombstone=universal --garbage-collection %t.o - | llvm-dwarfdump -a - | FileCheck %s
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# CHECK: DW_TAG_compile_unit
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# CHECK: DW_AT_name{{.*}}"CU1"
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# CHECK: DW_TAG_class_type
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# CHECK: DW_AT_name{{.*}}"class1"
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# CHECK-NOT: DW_TAG_class_type
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# CHECK-NOT: "class2"
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# CHECK-NOT: "class3"
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# CHECK: DW_TAG_subprogram
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# CHECK: DW_AT_name{{.*}}"foo1"
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# CHECK: DW_AT_low_pc{{.*}}0x0000000000001000
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# CHECK: DW_AT_high_pc{{.*}}0x0000000000001010
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# CHECK: DW_AT_type{{.*}}"class1"
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# CHECK-NOT: DW_TAG_subprogram
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# CHECK-NOT: "foo2"
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--- !ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_REL
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Machine: EM_X86_64
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Sections:
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- Name: .text
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
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Address: 0x1000
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Size: 0x1b
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DWARF:
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debug_abbrev:
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- Table:
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- Tag: DW_TAG_compile_unit
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Children: DW_CHILDREN_yes
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Attributes:
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- Attribute: DW_AT_producer
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Form: DW_FORM_string
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- Attribute: DW_AT_language
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Form: DW_FORM_data2
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- Attribute: DW_AT_name
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Form: DW_FORM_string
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- Attribute: DW_AT_low_pc
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Form: DW_FORM_addr
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- Attribute: DW_AT_high_pc
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Form: DW_FORM_data8
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- Tag: DW_TAG_subprogram
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Children: DW_CHILDREN_no
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Attributes:
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- Attribute: DW_AT_name
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Form: DW_FORM_string
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- Attribute: DW_AT_low_pc
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Form: DW_FORM_addr
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- Attribute: DW_AT_high_pc
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Form: DW_FORM_data8
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- Attribute: DW_AT_type
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Form: DW_FORM_ref4
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- Tag: DW_TAG_class_type
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Children: DW_CHILDREN_yes
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Attributes:
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- Attribute: DW_AT_name
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Form: DW_FORM_string
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- Tag: DW_TAG_member
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Children: DW_CHILDREN_no
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Attributes:
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- Attribute: DW_AT_type
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Form: DW_FORM_ref4
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- Attribute: DW_AT_name
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Form: DW_FORM_string
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- Tag: DW_TAG_class_type
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Children: DW_CHILDREN_no
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Attributes:
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- Attribute: DW_AT_name
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Form: DW_FORM_string
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- Attribute: DW_AT_declaration
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Form: DW_FORM_flag_present
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- Tag: DW_TAG_class_type
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Children: DW_CHILDREN_yes
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Attributes:
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- Attribute: DW_AT_name
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Form: DW_FORM_string
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- Attribute: DW_AT_declaration
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Form: DW_FORM_flag_present
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- Tag: DW_TAG_template_type_parameter
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Children: DW_CHILDREN_no
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Attributes:
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- Attribute: DW_AT_type
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Form: DW_FORM_ref4
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- Tag: DW_TAG_base_type
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Children: DW_CHILDREN_no
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Attributes:
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- Attribute: DW_AT_name
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Form: DW_FORM_string
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debug_info:
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- Version: 4
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Entries:
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- AbbrCode: 1
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Values:
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- CStr: by_hand
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- Value: 0x04
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- CStr: CU1
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- Value: 0x1000
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- Value: 0x1b
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- AbbrCode: 3
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Values:
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- CStr: class1
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- AbbrCode: 4
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Values:
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- Value: 0x0000006c
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- CStr: member1
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- AbbrCode: 0
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- AbbrCode: 3
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Values:
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- CStr: class2
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- AbbrCode: 4
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Values:
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- Value: 0x0000006c
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- CStr: member1
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- AbbrCode: 0
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- AbbrCode: 3
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Values:
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- CStr: class3
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- AbbrCode: 4
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Values:
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- Value: 0x0000006c
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- CStr: member1
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- AbbrCode: 0
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- AbbrCode: 8
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Values:
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- CStr: int
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- AbbrCode: 2
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Values:
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- CStr: foo1
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- Value: 0x1000
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- Value: 0x10
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- Value: 0x0000002a
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- AbbrCode: 2
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Values:
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- CStr: foo2
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- Value: 0x0
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- Value: 0x100
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- Value: 0x00000040
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- AbbrCode: 0
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...
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