[DebugInfo] Dump a .debug_line section, including line-number program,
without any compile units. Differential Revision: https://reviews.llvm.org/D40114 llvm-svn: 318842
This commit is contained in:
Paul Robinson
parent
c492500e7e
commit
511b54cadc
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@ -219,7 +219,7 @@ public:
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void clear();
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/// Parse prologue and all rows.
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bool parse(const DWARFDataExtractor &DebugLineData, uint32_t *OffsetPtr,
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bool parse(DWARFDataExtractor &DebugLineData, uint32_t *OffsetPtr,
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const DWARFUnit *U, raw_ostream *OS = nullptr);
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using RowVector = std::vector<Row>;
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@ -237,7 +237,7 @@ public:
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};
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const LineTable *getLineTable(uint32_t Offset) const;
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const LineTable *getOrParseLineTable(const DWARFDataExtractor &DebugLineData,
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const LineTable *getOrParseLineTable(DWARFDataExtractor &DebugLineData,
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uint32_t Offset, const DWARFUnit *U);
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private:
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@ -342,10 +342,9 @@ void DWARFContext::dump(
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while (Offset < LineData.getData().size()) {
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DWARFUnit *U = nullptr;
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auto It = LineToUnit.find(Offset);
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if (It != LineToUnit.end()) {
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if (It != LineToUnit.end())
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U = It->second;
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LineData.setAddressSize(U->getAddressByteSize());
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}
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LineData.setAddressSize(U ? U->getAddressByteSize() : 0);
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DWARFDebugLine::LineTable LineTable;
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if (DumpOffset && Offset != *DumpOffset) {
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// Find the size of this part of the line table section and skip it.
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@ -383,7 +383,7 @@ DWARFDebugLine::getLineTable(uint32_t Offset) const {
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}
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const DWARFDebugLine::LineTable *
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DWARFDebugLine::getOrParseLineTable(const DWARFDataExtractor &DebugLineData,
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DWARFDebugLine::getOrParseLineTable(DWARFDataExtractor &DebugLineData,
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uint32_t Offset, const DWARFUnit *U) {
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std::pair<LineTableIter, bool> Pos =
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LineTableMap.insert(LineTableMapTy::value_type(Offset, LineTable()));
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@ -395,7 +395,7 @@ DWARFDebugLine::getOrParseLineTable(const DWARFDataExtractor &DebugLineData,
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return LT;
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}
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bool DWARFDebugLine::LineTable::parse(const DWARFDataExtractor &DebugLineData,
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bool DWARFDebugLine::LineTable::parse(DWARFDataExtractor &DebugLineData,
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uint32_t *OffsetPtr, const DWARFUnit *U,
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raw_ostream *OS) {
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const uint32_t DebugLineOffset = *OffsetPtr;
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@ -414,6 +414,13 @@ bool DWARFDebugLine::LineTable::parse(const DWARFDataExtractor &DebugLineData,
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const uint32_t EndOffset =
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DebugLineOffset + Prologue.TotalLength + Prologue.sizeofTotalLength();
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// See if we should tell the data extractor the address size.
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if (DebugLineData.getAddressSize() == 0)
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DebugLineData.setAddressSize(Prologue.getAddressSize());
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else
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assert(Prologue.getAddressSize() == 0 ||
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Prologue.getAddressSize() == DebugLineData.getAddressSize());
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ParsingState State(this);
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while (*OffsetPtr < EndOffset) {
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@ -467,6 +474,13 @@ bool DWARFDebugLine::LineTable::parse(const DWARFDataExtractor &DebugLineData,
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// relocatable address. All of the other statement program opcodes
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// that affect the address register add a delta to it. This instruction
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// stores a relocatable value into it instead.
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//
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// Make sure the extractor knows the address size. If not, infer it
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// from the size of the operand.
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if (DebugLineData.getAddressSize() == 0)
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DebugLineData.setAddressSize(Len - 1);
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else
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assert(DebugLineData.getAddressSize() == Len - 1);
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State.Row.Address = DebugLineData.getRelocatedAddress(OffsetPtr);
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if (OS)
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*OS << format(" (0x%16.16" PRIx64 ")", State.Row.Address);
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@ -0,0 +1,93 @@
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# Test object to verify dwarfdump handles dumping a DWARF v5 line table
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# without an associated unit.
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# FIXME: Support FORM_strp in this situation.
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#
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# RUN: llvm-mc -triple x86_64-unknown-linux %s -filetype=obj -o - | \
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# RUN: llvm-dwarfdump -v - | FileCheck %s
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.section .text
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# Dummy function
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foo: ret
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.section .debug_line,"",@progbits
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# CHECK-LABEL: .debug_line contents:
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# DWARF v5 line-table header.
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LH_5_start:
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.long LH_5_end-LH_5_version # Length of Unit (DWARF-32 format)
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LH_5_version:
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.short 5 # DWARF version number
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.byte 8 # Address Size
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.byte 0 # Segment Selector Size
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.long LH_5_header_end-LH_5_params # Length of Prologue
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LH_5_params:
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.byte 1 # Minimum Instruction Length
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.byte 1 # Maximum Operations per Instruction
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.byte 1 # Default is_stmt
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.byte -5 # Line Base
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.byte 14 # Line Range
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.byte 13 # Opcode Base
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.byte 0 # Standard Opcode Lengths
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.byte 1
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.byte 1
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.byte 1
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.byte 1
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.byte 0
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.byte 0
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.byte 0
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.byte 1
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.byte 0
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.byte 0
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.byte 1
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# Directory table format
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.byte 1 # One element per directory entry
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.byte 1 # DW_LNCT_path
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.byte 0x08 # DW_FORM_string
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# Directory table entries
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.byte 2 # Two directory entries
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.asciz "Directory1"
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.asciz "Directory2"
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# File table format
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.byte 4 # Four elements per file entry
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.byte 2 # DW_LNCT_directory_index
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.byte 0x0b # DW_FORM_data1
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.byte 1 # DW_LNCT_path
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.byte 0x08 # DW_FORM_string
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.byte 3 # DW_LNCT_timestamp
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.byte 0x0f # DW_FORM_udata
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.byte 4 # DW_LNCT_size
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.byte 0x0f # DW_FORM_udata
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# File table entries
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.byte 2 # Two file entries
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.byte 2
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.asciz "File1"
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.byte 0x51
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.byte 0x52
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.byte 1
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.asciz "File2"
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.byte 0x53
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.byte 0x54
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LH_5_header_end:
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# Minimal line number program with an address in it, which shows
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# we picked up the address size from the line-table header.
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.byte 0
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.byte 9
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.byte 2 # DW_LNE_set_address
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.quad .text
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.byte 0
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.byte 1
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.byte 1 # DW_LNE_end_sequence
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LH_5_end:
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# CHECK: Line table prologue:
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# CHECK: version: 5
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# CHECK: address_size: 8
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# CHECK: seg_select_size: 0
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# CHECK: max_ops_per_inst: 1
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# CHECK: include_directories[ 1] = 'Directory1'
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# CHECK: include_directories[ 2] = 'Directory2'
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# CHECK-NOT: include_directories
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# CHECK: file_names[ 1] 2 0x00000051 0x00000052 File1{{$}}
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# CHECK: file_names[ 2] 1 0x00000053 0x00000054 File2{{$}}
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# CHECK-NOT: file_names
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# CHECK: 0x0000000000000000 {{.*}} is_stmt end_sequence
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@ -13,3 +13,33 @@ CHECK: line_base: -5
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CHECK: line_range: 14
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CHECK: opcode_base: 13
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CHECK: is_stmt end_sequence
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CHECK: total_length: 0x0000007c
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CHECK: version: 2
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CHECK:prologue_length: 0x00000048
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CHECK:min_inst_length: 1
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CHECK:default_is_stmt: 1
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CHECK: line_base: -5
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CHECK: line_range: 14
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CHECK: opcode_base: 13
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CHECK: is_stmt end_sequence
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CHECK: total_length: 0x00000094
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CHECK: version: 2
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CHECK:prologue_length: 0x00000044
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CHECK:min_inst_length: 1
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CHECK:default_is_stmt: 1
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CHECK: line_base: -5
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CHECK: line_range: 14
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CHECK: opcode_base: 13
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CHECK: is_stmt end_sequence
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CHECK: total_length: 0x0000007c
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CHECK: version: 2
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CHECK:prologue_length: 0x00000048
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CHECK:min_inst_length: 1
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CHECK:default_is_stmt: 1
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CHECK: line_base: -5
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CHECK: line_range: 14
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CHECK: opcode_base: 13
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CHECK: is_stmt end_sequence
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