forked from OSchip/llvm-project
[DebugInfo] Fix reading location tables of v5 units in DWP.
Without the patch, all version 5 compile units in a DWP file read location tables from the beginning of a .debug_loclists.dwo section. The patch fixes that by adjusting the reading offset the same way as for pre-v5 units. The section identifier to find the contribution entry corresponds to the version of the unit. Differential revision: https://reviews.llvm.org/D77145
This commit is contained in:
Igor Kudrin
parent
714324b79a
commit
49737df767
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@ -181,20 +181,17 @@ DWARFUnit::DWARFUnit(DWARFContext &DC, const DWARFSection &Section,
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if (IsDWO) {
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// If we are reading a package file, we need to adjust the location list
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// data based on the index entries.
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StringRef Data = LocSection->Data;
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StringRef Data = Header.getVersion() >= 5
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? Context.getDWARFObj().getLoclistsDWOSection().Data
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: LocSection->Data;
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if (auto *IndexEntry = Header.getIndexEntry())
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if (const auto *C = IndexEntry->getContribution(DW_SECT_EXT_LOC))
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if (const auto *C = IndexEntry->getContribution(
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Header.getVersion() >= 5 ? DW_SECT_LOCLISTS : DW_SECT_EXT_LOC))
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Data = Data.substr(C->Offset, C->Length);
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DWARFDataExtractor DWARFData =
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Header.getVersion() >= 5
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? DWARFDataExtractor(Context.getDWARFObj(),
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Context.getDWARFObj().getLoclistsDWOSection(),
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isLittleEndian, getAddressByteSize())
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: DWARFDataExtractor(Data, isLittleEndian, getAddressByteSize());
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DWARFDataExtractor DWARFData(Data, isLittleEndian, getAddressByteSize());
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LocTable =
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std::make_unique<DWARFDebugLoclists>(DWARFData, Header.getVersion());
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} else if (Header.getVersion() >= 5) {
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LocTable = std::make_unique<DWARFDebugLoclists>(
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DWARFDataExtractor(Context.getDWARFObj(),
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@ -0,0 +1,94 @@
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## The test checks that pre-v5 compile units in package files read their
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## location tables from .debug_loc.dwo sections.
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## See dwp-v5-loclists.s for v5 units.
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# RUN: llvm-mc -triple x86_64-unknown-linux %s -filetype=obj -o - | \
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# RUN: llvm-dwarfdump -debug-info -debug-loc - | \
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# RUN: FileCheck %s
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# CHECK: .debug_info.dwo contents:
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# CHECK: DW_TAG_compile_unit
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# CHECK-NEXT: DW_AT_GNU_dwo_id (0x1100001122222222)
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# CHECK: DW_TAG_variable
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# CHECK-NEXT: DW_AT_name ("a")
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# CHECK-NEXT: DW_AT_location (0x00000000:
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# CHECK-NEXT: DW_LLE_startx_length (0x0000000000000001, 0x0000000000000010): DW_OP_reg5 RDI)
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# CHECK: .debug_loc.dwo contents:
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# CHECK: 0x00000013:
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# CHECK-NEXT: DW_LLE_startx_length (0x00000001, 0x00000010): DW_OP_reg5 RDI
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.section .debug_abbrev.dwo, "e", @progbits
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.LAbbrevBegin:
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.uleb128 1 # Abbreviation Code
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.uleb128 17 # DW_TAG_compile_unit
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.byte 1 # DW_CHILDREN_yes
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.uleb128 0x2131 # DW_AT_GNU_dwo_id
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.uleb128 7 # DW_FORM_data8
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.uleb128 2 # Abbreviation Code
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.uleb128 52 # DW_TAG_variable
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.byte 0 # DW_CHILDREN_no
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.uleb128 3 # DW_AT_name
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.uleb128 8 # DW_FORM_string
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.uleb128 2 # DW_AT_location
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.uleb128 23 # DW_FORM_sec_offset
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 0 # EOM(3)
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.LAbbrevEnd:
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.section .debug_info.dwo, "e", @progbits
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.LCUBegin:
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.long .LCUEnd-.LCUVersion # Length of Unit
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.LCUVersion:
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.short 4 # Version
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.long 0 # Abbrev offset
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.byte 8 # Address size
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.uleb128 1 # Abbrev [1] DW_TAG_compile_unit
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.quad 0x1100001122222222 # DW_AT_GNU_dwo_id
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.uleb128 2 # Abbrev [2] DW_TAG_variable
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.asciz "a" # DW_AT_name
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.long 0 # DW_AT_location
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.byte 0 # End Of Children Mark
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.LCUEnd:
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.section .debug_loc.dwo, "e", @progbits
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## Start the section with a number of dummy DW_LLE_end_of_list entries to check
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## that the reading offset is correctly adjusted.
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.zero 0x13
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.LLocBegin:
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.byte 3 # DW_LLE_startx_length
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.uleb128 1 # Index
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.long 0x10 # Length
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.short 1 # Loc expr size
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.byte 85 # DW_OP_reg5
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.byte 0 # DW_LLE_end_of_list
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.LLocEnd:
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.section .debug_cu_index, "", @progbits
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## Header:
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.long 2 # Version
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.long 3 # Section count
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.long 1 # Unit count
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.long 2 # Slot count
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## Hash Table of Signatures:
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.quad 0x1100001122222222
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.quad 0
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## Parallel Table of Indexes:
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.long 1
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.long 0
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## Table of Section Offsets:
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## Row 0:
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.long 1 # DW_SECT_INFO
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.long 3 # DW_SECT_ABBREV
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.long 5 # DW_SECT_LOC
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## Row 1:
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.long 0 # Offset in .debug_info.dwo
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.long 0 # Offset in .debug_abbrev.dwo
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.long .LLocBegin-.debug_loc.dwo # Offset in .debug_loc.dwo
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## Table of Section Sizes:
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.long .LCUEnd-.LCUBegin # Size in .debug_info.dwo
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.long .LAbbrevEnd-.LAbbrevBegin # Size in .debug_abbrev.dwo
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.long .LLocEnd-.LLocBegin # Size in .debug_loc.dwo
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@ -0,0 +1,110 @@
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## The test checks that v5 compile units in package files read their
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## location tables from .debug_loclists.dwo sections.
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## See dwp-v2-loc.s for pre-v5 units.
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# RUN: llvm-mc -triple x86_64-unknown-linux %s -filetype=obj -o - | \
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# RUN: llvm-dwarfdump -debug-info -debug-loclists - | \
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# RUN: FileCheck %s
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# CHECK: .debug_info.dwo contents:
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# CHECK: DW_TAG_compile_unit
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# CHECK: DW_TAG_variable
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# CHECK-NEXT: DW_AT_name ("a")
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# CHECK-NEXT: DW_AT_location (0x{{[0-9a-f]+}}:
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# CHECK-NEXT: DW_LLE_startx_length (0x0000000000000001, 0x0000000000000010): DW_OP_reg5 RDI)
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# CHECK: .debug_loclists.dwo contents:
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# CHECK: locations list header:
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# CHECK: locations list header:
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# CHECK: 0x{{[0-9a-f]+}}:
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# CHECK-NEXT: DW_LLE_startx_length (0x0000000000000001, 0x0000000000000010): DW_OP_reg5 RDI
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.section .debug_abbrev.dwo, "e", @progbits
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.LAbbrevBegin:
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.uleb128 1 # Abbreviation Code
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.uleb128 17 # DW_TAG_compile_unit
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.byte 1 # DW_CHILDREN_yes
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.uleb128 2 # Abbreviation Code
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.uleb128 52 # DW_TAG_variable
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.byte 0 # DW_CHILDREN_no
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.uleb128 3 # DW_AT_name
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.uleb128 8 # DW_FORM_string
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.uleb128 2 # DW_AT_location
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.uleb128 23 # DW_FORM_sec_offset
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 0 # EOM(3)
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.LAbbrevEnd:
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.section .debug_info.dwo, "e", @progbits
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.LCUBegin:
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.long .LCUEnd-.LCUVersion # Length of Unit
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.LCUVersion:
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.short 5 # Version
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.byte 5 # DW_UT_split_compile
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.byte 8 # Address size
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.long 0 # Abbrev offset
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.quad 0x1100001122222222 # DWO id
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.uleb128 1 # Abbrev [1] DW_TAG_compile_unit
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.uleb128 2 # Abbrev [2] DW_TAG_variable
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.asciz "a" # DW_AT_name
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.long .LLL0-.LLLBegin # DW_AT_location
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.byte 0 # End Of Children Mark
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.LCUEnd:
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.section .debug_loclists.dwo, "e", @progbits
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## Start the section with an unused table to check that the reading offset
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## of the real table is correctly adjusted.
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.long .LLLDummyEnd-.LLLDummyVersion # Length of Unit
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.LLLDummyVersion:
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.short 5 # Version
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.byte 8 # Address size
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.byte 0 # Segment selector size
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.long 0 # Offset entry count
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.byte 0 # DW_LLE_end_of_list
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.LLLDummyEnd:
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.LLLBegin:
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.long .LLLEnd-.LLLVersion # Length of Unit
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.LLLVersion:
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.short 5 # Version
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.byte 8 # Address size
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.byte 0 # Segment selector size
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.long 0 # Offset entry count
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.LLL0:
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.byte 3 # DW_LLE_startx_length
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.uleb128 1 # Index
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.uleb128 0x10 # Length
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.uleb128 1 # Loc expr size
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.byte 85 # DW_OP_reg5
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.byte 0 # DW_LLE_end_of_list
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.LLLEnd:
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.section .debug_cu_index, "", @progbits
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## Header:
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.short 5 # Version
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.space 2 # Padding
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.long 3 # Section count
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.long 1 # Unit count
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.long 2 # Slot count
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## Hash Table of Signatures:
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.quad 0x1100001122222222
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.quad 0
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## Parallel Table of Indexes:
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.long 1
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.long 0
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## Table of Section Offsets:
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## Row 0:
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.long 1 # DW_SECT_INFO
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.long 3 # DW_SECT_ABBREV
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.long 5 # DW_SECT_LOCLISTS
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## Row 1:
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.long 0 # Offset in .debug_info.dwo
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.long 0 # Offset in .debug_abbrev.dwo
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.long .LLLBegin-.debug_loclists.dwo # Offset in .debug_loclists.dwo
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## Table of Section Sizes:
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.long .LCUEnd-.LCUBegin # Size in .debug_info.dwo
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.long .LAbbrevEnd-.LAbbrevBegin # Size in .debug_abbrev.dwo
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.long .LLLEnd-.LLLBegin # Size in .debug_loclists.dwo
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