Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/DebugInfo/DWARF/DWARFDebugLine.h b/linux-x64/clang/include/llvm/DebugInfo/DWARF/DWARFDebugLine.h
new file mode 100644
index 0000000..c24364a
--- /dev/null
+++ b/linux-x64/clang/include/llvm/DebugInfo/DWARF/DWARFDebugLine.h
@@ -0,0 +1,296 @@
+//===- DWARFDebugLine.h -----------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_DWARFDEBUGLINE_H
+#define LLVM_DEBUGINFO_DWARFDEBUGLINE_H
+
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/DebugInfo/DIContext.h"
+#include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
+#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
+#include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
+#include "llvm/Support/MD5.h"
+#include <cstdint>
+#include <map>
+#include <string>
+#include <vector>
+
+namespace llvm {
+
+class DWARFUnit;
+class raw_ostream;
+
+class DWARFDebugLine {
+public:
+ struct FileNameEntry {
+ FileNameEntry() = default;
+
+ DWARFFormValue Name;
+ uint64_t DirIdx = 0;
+ uint64_t ModTime = 0;
+ uint64_t Length = 0;
+ MD5::MD5Result Checksum;
+ DWARFFormValue Source;
+ };
+
+ /// Tracks which optional content types are present in a DWARF file name
+ /// entry format.
+ struct ContentTypeTracker {
+ ContentTypeTracker() = default;
+
+ /// Whether filename entries provide a modification timestamp.
+ bool HasModTime = false;
+ /// Whether filename entries provide a file size.
+ bool HasLength = false;
+ /// For v5, whether filename entries provide an MD5 checksum.
+ bool HasMD5 = false;
+ /// For v5, whether filename entries provide source text.
+ bool HasSource = false;
+
+ /// Update tracked content types with \p ContentType.
+ void trackContentType(dwarf::LineNumberEntryFormat ContentType);
+ };
+
+ struct Prologue {
+ Prologue();
+
+ /// The size in bytes of the statement information for this compilation unit
+ /// (not including the total_length field itself).
+ uint64_t TotalLength;
+ /// Version, address size (starting in v5), and DWARF32/64 format; these
+ /// parameters affect interpretation of forms (used in the directory and
+ /// file tables starting with v5).
+ dwarf::FormParams FormParams;
+ /// The number of bytes following the prologue_length field to the beginning
+ /// of the first byte of the statement program itself.
+ uint64_t PrologueLength;
+ /// In v5, size in bytes of a segment selector.
+ uint8_t SegSelectorSize;
+ /// The size in bytes of the smallest target machine instruction. Statement
+ /// program opcodes that alter the address register first multiply their
+ /// operands by this value.
+ uint8_t MinInstLength;
+ /// The maximum number of individual operations that may be encoded in an
+ /// instruction.
+ uint8_t MaxOpsPerInst;
+ /// The initial value of theis_stmtregister.
+ uint8_t DefaultIsStmt;
+ /// This parameter affects the meaning of the special opcodes. See below.
+ int8_t LineBase;
+ /// This parameter affects the meaning of the special opcodes. See below.
+ uint8_t LineRange;
+ /// The number assigned to the first special opcode.
+ uint8_t OpcodeBase;
+ /// This tracks which optional file format content types are present.
+ ContentTypeTracker ContentTypes;
+ std::vector<uint8_t> StandardOpcodeLengths;
+ std::vector<DWARFFormValue> IncludeDirectories;
+ std::vector<FileNameEntry> FileNames;
+
+ const dwarf::FormParams getFormParams() const { return FormParams; }
+ uint16_t getVersion() const { return FormParams.Version; }
+ uint8_t getAddressSize() const { return FormParams.AddrSize; }
+ bool isDWARF64() const { return FormParams.Format == dwarf::DWARF64; }
+
+ uint32_t sizeofTotalLength() const { return isDWARF64() ? 12 : 4; }
+
+ uint32_t sizeofPrologueLength() const { return isDWARF64() ? 8 : 4; }
+
+ /// Length of the prologue in bytes.
+ uint32_t getLength() const {
+ return PrologueLength + sizeofTotalLength() + sizeof(getVersion()) +
+ sizeofPrologueLength();
+ }
+
+ /// Length of the line table data in bytes (not including the prologue).
+ uint32_t getStatementTableLength() const {
+ return TotalLength + sizeofTotalLength() - getLength();
+ }
+
+ int32_t getMaxLineIncrementForSpecialOpcode() const {
+ return LineBase + (int8_t)LineRange - 1;
+ }
+
+ void clear();
+ void dump(raw_ostream &OS, DIDumpOptions DumpOptions) const;
+ bool parse(const DWARFDataExtractor &DebugLineData, uint32_t *OffsetPtr,
+ const DWARFContext &Ctx, const DWARFUnit *U = nullptr);
+ };
+
+ /// Standard .debug_line state machine structure.
+ struct Row {
+ explicit Row(bool DefaultIsStmt = false);
+
+ /// Called after a row is appended to the matrix.
+ void postAppend();
+ void reset(bool DefaultIsStmt);
+ void dump(raw_ostream &OS) const;
+
+ static void dumpTableHeader(raw_ostream &OS);
+
+ static bool orderByAddress(const Row &LHS, const Row &RHS) {
+ return LHS.Address < RHS.Address;
+ }
+
+ /// The program-counter value corresponding to a machine instruction
+ /// generated by the compiler.
+ uint64_t Address;
+ /// An unsigned integer indicating a source line number. Lines are numbered
+ /// beginning at 1. The compiler may emit the value 0 in cases where an
+ /// instruction cannot be attributed to any source line.
+ uint32_t Line;
+ /// An unsigned integer indicating a column number within a source line.
+ /// Columns are numbered beginning at 1. The value 0 is reserved to indicate
+ /// that a statement begins at the 'left edge' of the line.
+ uint16_t Column;
+ /// An unsigned integer indicating the identity of the source file
+ /// corresponding to a machine instruction.
+ uint16_t File;
+ /// An unsigned integer representing the DWARF path discriminator value
+ /// for this location.
+ uint32_t Discriminator;
+ /// An unsigned integer whose value encodes the applicable instruction set
+ /// architecture for the current instruction.
+ uint8_t Isa;
+ /// A boolean indicating that the current instruction is the beginning of a
+ /// statement.
+ uint8_t IsStmt : 1,
+ /// A boolean indicating that the current instruction is the
+ /// beginning of a basic block.
+ BasicBlock : 1,
+ /// A boolean indicating that the current address is that of the
+ /// first byte after the end of a sequence of target machine
+ /// instructions.
+ EndSequence : 1,
+ /// A boolean indicating that the current address is one (of possibly
+ /// many) where execution should be suspended for an entry breakpoint
+ /// of a function.
+ PrologueEnd : 1,
+ /// A boolean indicating that the current address is one (of possibly
+ /// many) where execution should be suspended for an exit breakpoint
+ /// of a function.
+ EpilogueBegin : 1;
+ };
+
+ /// Represents a series of contiguous machine instructions. Line table for
+ /// each compilation unit may consist of multiple sequences, which are not
+ /// guaranteed to be in the order of ascending instruction address.
+ struct Sequence {
+ Sequence();
+
+ /// Sequence describes instructions at address range [LowPC, HighPC)
+ /// and is described by line table rows [FirstRowIndex, LastRowIndex).
+ uint64_t LowPC;
+ uint64_t HighPC;
+ unsigned FirstRowIndex;
+ unsigned LastRowIndex;
+ bool Empty;
+
+ void reset();
+
+ static bool orderByLowPC(const Sequence &LHS, const Sequence &RHS) {
+ return LHS.LowPC < RHS.LowPC;
+ }
+
+ bool isValid() const {
+ return !Empty && (LowPC < HighPC) && (FirstRowIndex < LastRowIndex);
+ }
+
+ bool containsPC(uint64_t PC) const { return (LowPC <= PC && PC < HighPC); }
+ };
+
+ struct LineTable {
+ LineTable();
+
+ /// Represents an invalid row
+ const uint32_t UnknownRowIndex = UINT32_MAX;
+
+ void appendRow(const DWARFDebugLine::Row &R) { Rows.push_back(R); }
+
+ void appendSequence(const DWARFDebugLine::Sequence &S) {
+ Sequences.push_back(S);
+ }
+
+ /// Returns the index of the row with file/line info for a given address,
+ /// or UnknownRowIndex if there is no such row.
+ uint32_t lookupAddress(uint64_t Address) const;
+
+ bool lookupAddressRange(uint64_t Address, uint64_t Size,
+ std::vector<uint32_t> &Result) const;
+
+ bool hasFileAtIndex(uint64_t FileIndex) const;
+
+ /// Extracts filename by its index in filename table in prologue.
+ /// Returns true on success.
+ bool getFileNameByIndex(uint64_t FileIndex, const char *CompDir,
+ DILineInfoSpecifier::FileLineInfoKind Kind,
+ std::string &Result) const;
+
+ /// Fills the Result argument with the file and line information
+ /// corresponding to Address. Returns true on success.
+ bool getFileLineInfoForAddress(uint64_t Address, const char *CompDir,
+ DILineInfoSpecifier::FileLineInfoKind Kind,
+ DILineInfo &Result) const;
+
+ void dump(raw_ostream &OS, DIDumpOptions DumpOptions) const;
+ void clear();
+
+ /// Parse prologue and all rows.
+ bool parse(DWARFDataExtractor &DebugLineData, uint32_t *OffsetPtr,
+ const DWARFContext &Ctx, const DWARFUnit *U,
+ raw_ostream *OS = nullptr);
+
+ using RowVector = std::vector<Row>;
+ using RowIter = RowVector::const_iterator;
+ using SequenceVector = std::vector<Sequence>;
+ using SequenceIter = SequenceVector::const_iterator;
+
+ struct Prologue Prologue;
+ RowVector Rows;
+ SequenceVector Sequences;
+
+ private:
+ uint32_t findRowInSeq(const DWARFDebugLine::Sequence &Seq,
+ uint64_t Address) const;
+ Optional<StringRef> getSourceByIndex(uint64_t FileIndex,
+ DILineInfoSpecifier::FileLineInfoKind Kind) const;
+ };
+
+ const LineTable *getLineTable(uint32_t Offset) const;
+ const LineTable *getOrParseLineTable(DWARFDataExtractor &DebugLineData,
+ uint32_t Offset, const DWARFContext &C,
+ const DWARFUnit *U);
+
+private:
+ struct ParsingState {
+ ParsingState(struct LineTable *LT);
+
+ void resetRowAndSequence();
+ void appendRowToMatrix(uint32_t Offset);
+
+ /// Line table we're currently parsing.
+ struct LineTable *LineTable;
+ /// The row number that starts at zero for the prologue, and increases for
+ /// each row added to the matrix.
+ unsigned RowNumber = 0;
+ struct Row Row;
+ struct Sequence Sequence;
+ };
+
+ using LineTableMapTy = std::map<uint32_t, LineTable>;
+ using LineTableIter = LineTableMapTy::iterator;
+ using LineTableConstIter = LineTableMapTy::const_iterator;
+
+ LineTableMapTy LineTableMap;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_DEBUGINFO_DWARFDEBUGLINE_H