Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 3130 insertions, 0 deletions

diff --git a/vendor/gimli/src/read/line.rs b/vendor/gimli/src/read/line.rs
new file mode 100644
index 0000000..47eae92
--- /dev/null
+++ b/vendor/gimli/src/read/line.rs
@@ -0,0 +1,3130 @@
+use alloc::vec::Vec;
+use core::fmt;
+use core::num::{NonZeroU64, Wrapping};
+use core::result;
+
+use crate::common::{
+    DebugLineOffset, DebugLineStrOffset, DebugStrOffset, DebugStrOffsetsIndex, Encoding, Format,
+    LineEncoding, SectionId,
+};
+use crate::constants;
+use crate::endianity::Endianity;
+use crate::read::{AttributeValue, EndianSlice, Error, Reader, ReaderOffset, Result, Section};
+
+/// The `DebugLine` struct contains the source location to instruction mapping
+/// found in the `.debug_line` section.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct DebugLine<R> {
+    debug_line_section: R,
+}
+
+impl<'input, Endian> DebugLine<EndianSlice<'input, Endian>>
+where
+    Endian: Endianity,
+{
+    /// Construct a new `DebugLine` instance from the data in the `.debug_line`
+    /// section.
+    ///
+    /// It is the caller's responsibility to read the `.debug_line` section and
+    /// present it as a `&[u8]` slice. That means using some ELF loader on
+    /// Linux, a Mach-O loader on macOS, etc.
+    ///
+    /// ```
+    /// use gimli::{DebugLine, LittleEndian};
+    ///
+    /// # let buf = [0x00, 0x01, 0x02, 0x03];
+    /// # let read_debug_line_section_somehow = || &buf;
+    /// let debug_line = DebugLine::new(read_debug_line_section_somehow(), LittleEndian);
+    /// ```
+    pub fn new(debug_line_section: &'input [u8], endian: Endian) -> Self {
+        Self::from(EndianSlice::new(debug_line_section, endian))
+    }
+}
+
+impl<R: Reader> DebugLine<R> {
+    /// Parse the line number program whose header is at the given `offset` in the
+    /// `.debug_line` section.
+    ///
+    /// The `address_size` must match the compilation unit that the lines apply to.
+    /// The `comp_dir` should be from the `DW_AT_comp_dir` attribute of the compilation
+    /// unit. The `comp_name` should be from the `DW_AT_name` attribute of the
+    /// compilation unit.
+    ///
+    /// ```rust,no_run
+    /// use gimli::{DebugLine, DebugLineOffset, IncompleteLineProgram, EndianSlice, LittleEndian};
+    ///
+    /// # let buf = [];
+    /// # let read_debug_line_section_somehow = || &buf;
+    /// let debug_line = DebugLine::new(read_debug_line_section_somehow(), LittleEndian);
+    ///
+    /// // In a real example, we'd grab the offset via a compilation unit
+    /// // entry's `DW_AT_stmt_list` attribute, and the address size from that
+    /// // unit directly.
+    /// let offset = DebugLineOffset(0);
+    /// let address_size = 8;
+    ///
+    /// let program = debug_line.program(offset, address_size, None, None)
+    ///     .expect("should have found a header at that offset, and parsed it OK");
+    /// ```
+    pub fn program(
+        &self,
+        offset: DebugLineOffset<R::Offset>,
+        address_size: u8,
+        comp_dir: Option<R>,
+        comp_name: Option<R>,
+    ) -> Result<IncompleteLineProgram<R>> {
+        let input = &mut self.debug_line_section.clone();
+        input.skip(offset.0)?;
+        let header = LineProgramHeader::parse(input, offset, address_size, comp_dir, comp_name)?;
+        let program = IncompleteLineProgram { header };
+        Ok(program)
+    }
+}
+
+impl<T> DebugLine<T> {
+    /// Create a `DebugLine` section that references the data in `self`.
+    ///
+    /// This is useful when `R` implements `Reader` but `T` does not.
+    ///
+    /// ## Example Usage
+    ///
+    /// ```rust,no_run
+    /// # let load_section = || unimplemented!();
+    /// // Read the DWARF section into a `Vec` with whatever object loader you're using.
+    /// let owned_section: gimli::DebugLine<Vec<u8>> = load_section();
+    /// // Create a reference to the DWARF section.
+    /// let section = owned_section.borrow(|section| {
+    ///     gimli::EndianSlice::new(&section, gimli::LittleEndian)
+    /// });
+    /// ```
+    pub fn borrow<'a, F, R>(&'a self, mut borrow: F) -> DebugLine<R>
+    where
+        F: FnMut(&'a T) -> R,
+    {
+        borrow(&self.debug_line_section).into()
+    }
+}
+
+impl<R> Section<R> for DebugLine<R> {
+    fn id() -> SectionId {
+        SectionId::DebugLine
+    }
+
+    fn reader(&self) -> &R {
+        &self.debug_line_section
+    }
+}
+
+impl<R> From<R> for DebugLine<R> {
+    fn from(debug_line_section: R) -> Self {
+        DebugLine { debug_line_section }
+    }
+}
+
+/// Deprecated. `LineNumberProgram` has been renamed to `LineProgram`.
+#[deprecated(note = "LineNumberProgram has been renamed to LineProgram, use that instead.")]
+pub type LineNumberProgram<R, Offset> = dyn LineProgram<R, Offset>;
+
+/// A `LineProgram` provides access to a `LineProgramHeader` and
+/// a way to add files to the files table if necessary. Gimli consumers should
+/// never need to use or see this trait.
+pub trait LineProgram<R, Offset = <R as Reader>::Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    /// Get a reference to the held `LineProgramHeader`.
+    fn header(&self) -> &LineProgramHeader<R, Offset>;
+    /// Add a file to the file table if necessary.
+    fn add_file(&mut self, file: FileEntry<R, Offset>);
+}
+
+impl<R, Offset> LineProgram<R, Offset> for IncompleteLineProgram<R, Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    fn header(&self) -> &LineProgramHeader<R, Offset> {
+        &self.header
+    }
+    fn add_file(&mut self, file: FileEntry<R, Offset>) {
+        self.header.file_names.push(file);
+    }
+}
+
+impl<'program, R, Offset> LineProgram<R, Offset> for &'program CompleteLineProgram<R, Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    fn header(&self) -> &LineProgramHeader<R, Offset> {
+        &self.header
+    }
+    fn add_file(&mut self, _: FileEntry<R, Offset>) {
+        // Nop. Our file table is already complete.
+    }
+}
+
+/// Deprecated. `StateMachine` has been renamed to `LineRows`.
+#[deprecated(note = "StateMachine has been renamed to LineRows, use that instead.")]
+pub type StateMachine<R, Program, Offset> = LineRows<R, Program, Offset>;
+
+/// Executes a `LineProgram` to iterate over the rows in the matrix of line number information.
+///
+/// "The hypothetical machine used by a consumer of the line number information
+/// to expand the byte-coded instruction stream into a matrix of line number
+/// information." -- Section 6.2.1
+#[derive(Debug, Clone)]
+pub struct LineRows<R, Program, Offset = <R as Reader>::Offset>
+where
+    Program: LineProgram<R, Offset>,
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    program: Program,
+    row: LineRow,
+    instructions: LineInstructions<R>,
+}
+
+type OneShotLineRows<R, Offset = <R as Reader>::Offset> =
+    LineRows<R, IncompleteLineProgram<R, Offset>, Offset>;
+
+type ResumedLineRows<'program, R, Offset = <R as Reader>::Offset> =
+    LineRows<R, &'program CompleteLineProgram<R, Offset>, Offset>;
+
+impl<R, Program, Offset> LineRows<R, Program, Offset>
+where
+    Program: LineProgram<R, Offset>,
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    fn new(program: IncompleteLineProgram<R, Offset>) -> OneShotLineRows<R, Offset> {
+        let row = LineRow::new(program.header());
+        let instructions = LineInstructions {
+            input: program.header().program_buf.clone(),
+        };
+        LineRows {
+            program,
+            row,
+            instructions,
+        }
+    }
+
+    fn resume<'program>(
+        program: &'program CompleteLineProgram<R, Offset>,
+        sequence: &LineSequence<R>,
+    ) -> ResumedLineRows<'program, R, Offset> {
+        let row = LineRow::new(program.header());
+        let instructions = sequence.instructions.clone();
+        LineRows {
+            program,
+            row,
+            instructions,
+        }
+    }
+
+    /// Get a reference to the header for this state machine's line number
+    /// program.
+    #[inline]
+    pub fn header(&self) -> &LineProgramHeader<R, Offset> {
+        self.program.header()
+    }
+
+    /// Parse and execute the next instructions in the line number program until
+    /// another row in the line number matrix is computed.
+    ///
+    /// The freshly computed row is returned as `Ok(Some((header, row)))`.
+    /// If the matrix is complete, and there are no more new rows in the line
+    /// number matrix, then `Ok(None)` is returned. If there was an error parsing
+    /// an instruction, then `Err(e)` is returned.
+    ///
+    /// Unfortunately, the references mean that this cannot be a
+    /// `FallibleIterator`.
+    pub fn next_row(&mut self) -> Result<Option<(&LineProgramHeader<R, Offset>, &LineRow)>> {
+        // Perform any reset that was required after copying the previous row.
+        self.row.reset(self.program.header());
+
+        loop {
+            // Split the borrow here, rather than calling `self.header()`.
+            match self.instructions.next_instruction(self.program.header()) {
+                Err(err) => return Err(err),
+                Ok(None) => return Ok(None),
+                Ok(Some(instruction)) => {
+                    if self.row.execute(instruction, &mut self.program) {
+                        if self.row.tombstone {
+                            // Perform any reset that was required for the tombstone row.
+                            // Normally this is done when `next_row` is called again, but for
+                            // tombstones we loop immediately.
+                            self.row.reset(self.program.header());
+                        } else {
+                            return Ok(Some((self.header(), &self.row)));
+                        }
+                    }
+                    // Fall through, parse the next instruction, and see if that
+                    // yields a row.
+                }
+            }
+        }
+    }
+}
+
+/// Deprecated. `Opcode` has been renamed to `LineInstruction`.
+#[deprecated(note = "Opcode has been renamed to LineInstruction, use that instead.")]
+pub type Opcode<R> = LineInstruction<R, <R as Reader>::Offset>;
+
+/// A parsed line number program instruction.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum LineInstruction<R, Offset = <R as Reader>::Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    /// > ### 6.2.5.1 Special Opcodes
+    /// >
+    /// > Each ubyte special opcode has the following effect on the state machine:
+    /// >
+    /// >   1. Add a signed integer to the line register.
+    /// >
+    /// >   2. Modify the operation pointer by incrementing the address and
+    /// >   op_index registers as described below.
+    /// >
+    /// >   3. Append a row to the matrix using the current values of the state
+    /// >   machine registers.
+    /// >
+    /// >   4. Set the basic_block register to “false.”
+    /// >
+    /// >   5. Set the prologue_end register to “false.”
+    /// >
+    /// >   6. Set the epilogue_begin register to “false.”
+    /// >
+    /// >   7. Set the discriminator register to 0.
+    /// >
+    /// > All of the special opcodes do those same seven things; they differ from
+    /// > one another only in what values they add to the line, address and
+    /// > op_index registers.
+    Special(u8),
+
+    /// "[`LineInstruction::Copy`] appends a row to the matrix using the current
+    /// values of the state machine registers. Then it sets the discriminator
+    /// register to 0, and sets the basic_block, prologue_end and epilogue_begin
+    /// registers to “false.”"
+    Copy,
+
+    /// "The DW_LNS_advance_pc opcode takes a single unsigned LEB128 operand as
+    /// the operation advance and modifies the address and op_index registers
+    /// [the same as `LineInstruction::Special`]"
+    AdvancePc(u64),
+
+    /// "The DW_LNS_advance_line opcode takes a single signed LEB128 operand and
+    /// adds that value to the line register of the state machine."
+    AdvanceLine(i64),
+
+    /// "The DW_LNS_set_file opcode takes a single unsigned LEB128 operand and
+    /// stores it in the file register of the state machine."
+    SetFile(u64),
+
+    /// "The DW_LNS_set_column opcode takes a single unsigned LEB128 operand and
+    /// stores it in the column register of the state machine."
+    SetColumn(u64),
+
+    /// "The DW_LNS_negate_stmt opcode takes no operands. It sets the is_stmt
+    /// register of the state machine to the logical negation of its current
+    /// value."
+    NegateStatement,
+
+    /// "The DW_LNS_set_basic_block opcode takes no operands. It sets the
+    /// basic_block register of the state machine to “true.”"
+    SetBasicBlock,
+
+    /// > The DW_LNS_const_add_pc opcode takes no operands. It advances the
+    /// > address and op_index registers by the increments corresponding to
+    /// > special opcode 255.
+    /// >
+    /// > When the line number program needs to advance the address by a small
+    /// > amount, it can use a single special opcode, which occupies a single
+    /// > byte. When it needs to advance the address by up to twice the range of
+    /// > the last special opcode, it can use DW_LNS_const_add_pc followed by a
+    /// > special opcode, for a total of two bytes. Only if it needs to advance
+    /// > the address by more than twice that range will it need to use both
+    /// > DW_LNS_advance_pc and a special opcode, requiring three or more bytes.
+    ConstAddPc,
+
+    /// > The DW_LNS_fixed_advance_pc opcode takes a single uhalf (unencoded)
+    /// > operand and adds it to the address register of the state machine and
+    /// > sets the op_index register to 0. This is the only standard opcode whose
+    /// > operand is not a variable length number. It also does not multiply the
+    /// > operand by the minimum_instruction_length field of the header.
+    FixedAddPc(u16),
+
+    /// "[`LineInstruction::SetPrologueEnd`] sets the prologue_end register to “true”."
+    SetPrologueEnd,
+
+    /// "[`LineInstruction::SetEpilogueBegin`] sets the epilogue_begin register to
+    /// “true”."
+    SetEpilogueBegin,
+
+    /// "The DW_LNS_set_isa opcode takes a single unsigned LEB128 operand and
+    /// stores that value in the isa register of the state machine."
+    SetIsa(u64),
+
+    /// An unknown standard opcode with zero operands.
+    UnknownStandard0(constants::DwLns),
+
+    /// An unknown standard opcode with one operand.
+    UnknownStandard1(constants::DwLns, u64),
+
+    /// An unknown standard opcode with multiple operands.
+    UnknownStandardN(constants::DwLns, R),
+
+    /// > [`LineInstruction::EndSequence`] sets the end_sequence register of the state
+    /// > machine to “true” and appends a row to the matrix using the current
+    /// > values of the state-machine registers. Then it resets the registers to
+    /// > the initial values specified above (see Section 6.2.2). Every line
+    /// > number program sequence must end with a DW_LNE_end_sequence instruction
+    /// > which creates a row whose address is that of the byte after the last
+    /// > target machine instruction of the sequence.
+    EndSequence,
+
+    /// > The DW_LNE_set_address opcode takes a single relocatable address as an
+    /// > operand. The size of the operand is the size of an address on the target
+    /// > machine. It sets the address register to the value given by the
+    /// > relocatable address and sets the op_index register to 0.
+    /// >
+    /// > All of the other line number program opcodes that affect the address
+    /// > register add a delta to it. This instruction stores a relocatable value
+    /// > into it instead.
+    SetAddress(u64),
+
+    /// Defines a new source file in the line number program and appends it to
+    /// the line number program header's list of source files.
+    DefineFile(FileEntry<R, Offset>),
+
+    /// "The DW_LNE_set_discriminator opcode takes a single parameter, an
+    /// unsigned LEB128 integer. It sets the discriminator register to the new
+    /// value."
+    SetDiscriminator(u64),
+
+    /// An unknown extended opcode and the slice of its unparsed operands.
+    UnknownExtended(constants::DwLne, R),
+}
+
+impl<R, Offset> LineInstruction<R, Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    fn parse<'header>(
+        header: &'header LineProgramHeader<R>,
+        input: &mut R,
+    ) -> Result<LineInstruction<R>>
+    where
+        R: 'header,
+    {
+        let opcode = input.read_u8()?;
+        if opcode == 0 {
+            let length = input.read_uleb128().and_then(R::Offset::from_u64)?;
+            let mut instr_rest = input.split(length)?;
+            let opcode = instr_rest.read_u8()?;
+
+            match constants::DwLne(opcode) {
+                constants::DW_LNE_end_sequence => Ok(LineInstruction::EndSequence),
+
+                constants::DW_LNE_set_address => {
+                    let address = instr_rest.read_address(header.address_size())?;
+                    Ok(LineInstruction::SetAddress(address))
+                }
+
+                constants::DW_LNE_define_file => {
+                    if header.version() <= 4 {
+                        let path_name = instr_rest.read_null_terminated_slice()?;
+                        let entry = FileEntry::parse(&mut instr_rest, path_name)?;
+                        Ok(LineInstruction::DefineFile(entry))
+                    } else {
+                        Ok(LineInstruction::UnknownExtended(
+                            constants::DW_LNE_define_file,
+                            instr_rest,
+                        ))
+                    }
+                }
+
+                constants::DW_LNE_set_discriminator => {
+                    let discriminator = instr_rest.read_uleb128()?;
+                    Ok(LineInstruction::SetDiscriminator(discriminator))
+                }
+
+                otherwise => Ok(LineInstruction::UnknownExtended(otherwise, instr_rest)),
+            }
+        } else if opcode >= header.opcode_base {
+            Ok(LineInstruction::Special(opcode))
+        } else {
+            match constants::DwLns(opcode) {
+                constants::DW_LNS_copy => Ok(LineInstruction::Copy),
+
+                constants::DW_LNS_advance_pc => {
+                    let advance = input.read_uleb128()?;
+                    Ok(LineInstruction::AdvancePc(advance))
+                }
+
+                constants::DW_LNS_advance_line => {
+                    let increment = input.read_sleb128()?;
+                    Ok(LineInstruction::AdvanceLine(increment))
+                }
+
+                constants::DW_LNS_set_file => {
+                    let file = input.read_uleb128()?;
+                    Ok(LineInstruction::SetFile(file))
+                }
+
+                constants::DW_LNS_set_column => {
+                    let column = input.read_uleb128()?;
+                    Ok(LineInstruction::SetColumn(column))
+                }
+
+                constants::DW_LNS_negate_stmt => Ok(LineInstruction::NegateStatement),
+
+                constants::DW_LNS_set_basic_block => Ok(LineInstruction::SetBasicBlock),
+
+                constants::DW_LNS_const_add_pc => Ok(LineInstruction::ConstAddPc),
+
+                constants::DW_LNS_fixed_advance_pc => {
+                    let advance = input.read_u16()?;
+                    Ok(LineInstruction::FixedAddPc(advance))
+                }
+
+                constants::DW_LNS_set_prologue_end => Ok(LineInstruction::SetPrologueEnd),
+
+                constants::DW_LNS_set_epilogue_begin => Ok(LineInstruction::SetEpilogueBegin),
+
+                constants::DW_LNS_set_isa => {
+                    let isa = input.read_uleb128()?;
+                    Ok(LineInstruction::SetIsa(isa))
+                }
+
+                otherwise => {
+                    let mut opcode_lengths = header.standard_opcode_lengths().clone();
+                    opcode_lengths.skip(R::Offset::from_u8(opcode - 1))?;
+                    let num_args = opcode_lengths.read_u8()? as usize;
+                    match num_args {
+                        0 => Ok(LineInstruction::UnknownStandard0(otherwise)),
+                        1 => {
+                            let arg = input.read_uleb128()?;
+                            Ok(LineInstruction::UnknownStandard1(otherwise, arg))
+                        }
+                        _ => {
+                            let mut args = input.clone();
+                            for _ in 0..num_args {
+                                input.read_uleb128()?;
+                            }
+                            let len = input.offset_from(&args);
+                            args.truncate(len)?;
+                            Ok(LineInstruction::UnknownStandardN(otherwise, args))
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+impl<R, Offset> fmt::Display for LineInstruction<R, Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> result::Result<(), fmt::Error> {
+        match *self {
+            LineInstruction::Special(opcode) => write!(f, "Special opcode {}", opcode),
+            LineInstruction::Copy => write!(f, "{}", constants::DW_LNS_copy),
+            LineInstruction::AdvancePc(advance) => {
+                write!(f, "{} by {}", constants::DW_LNS_advance_pc, advance)
+            }
+            LineInstruction::AdvanceLine(increment) => {
+                write!(f, "{} by {}", constants::DW_LNS_advance_line, increment)
+            }
+            LineInstruction::SetFile(file) => {
+                write!(f, "{} to {}", constants::DW_LNS_set_file, file)
+            }
+            LineInstruction::SetColumn(column) => {
+                write!(f, "{} to {}", constants::DW_LNS_set_column, column)
+            }
+            LineInstruction::NegateStatement => write!(f, "{}", constants::DW_LNS_negate_stmt),
+            LineInstruction::SetBasicBlock => write!(f, "{}", constants::DW_LNS_set_basic_block),
+            LineInstruction::ConstAddPc => write!(f, "{}", constants::DW_LNS_const_add_pc),
+            LineInstruction::FixedAddPc(advance) => {
+                write!(f, "{} by {}", constants::DW_LNS_fixed_advance_pc, advance)
+            }
+            LineInstruction::SetPrologueEnd => write!(f, "{}", constants::DW_LNS_set_prologue_end),
+            LineInstruction::SetEpilogueBegin => {
+                write!(f, "{}", constants::DW_LNS_set_epilogue_begin)
+            }
+            LineInstruction::SetIsa(isa) => write!(f, "{} to {}", constants::DW_LNS_set_isa, isa),
+            LineInstruction::UnknownStandard0(opcode) => write!(f, "Unknown {}", opcode),
+            LineInstruction::UnknownStandard1(opcode, arg) => {
+                write!(f, "Unknown {} with operand {}", opcode, arg)
+            }
+            LineInstruction::UnknownStandardN(opcode, ref args) => {
+                write!(f, "Unknown {} with operands {:?}", opcode, args)
+            }
+            LineInstruction::EndSequence => write!(f, "{}", constants::DW_LNE_end_sequence),
+            LineInstruction::SetAddress(address) => {
+                write!(f, "{} to {}", constants::DW_LNE_set_address, address)
+            }
+            LineInstruction::DefineFile(_) => write!(f, "{}", constants::DW_LNE_define_file),
+            LineInstruction::SetDiscriminator(discr) => {
+                write!(f, "{} to {}", constants::DW_LNE_set_discriminator, discr)
+            }
+            LineInstruction::UnknownExtended(opcode, _) => write!(f, "Unknown {}", opcode),
+        }
+    }
+}
+
+/// Deprecated. `OpcodesIter` has been renamed to `LineInstructions`.
+#[deprecated(note = "OpcodesIter has been renamed to LineInstructions, use that instead.")]
+pub type OpcodesIter<R> = LineInstructions<R>;
+
+/// An iterator yielding parsed instructions.
+///
+/// See
+/// [`LineProgramHeader::instructions`](./struct.LineProgramHeader.html#method.instructions)
+/// for more details.
+#[derive(Clone, Debug)]
+pub struct LineInstructions<R: Reader> {
+    input: R,
+}
+
+impl<R: Reader> LineInstructions<R> {
+    fn remove_trailing(&self, other: &LineInstructions<R>) -> Result<LineInstructions<R>> {
+        let offset = other.input.offset_from(&self.input);
+        let mut input = self.input.clone();
+        input.truncate(offset)?;
+        Ok(LineInstructions { input })
+    }
+}
+
+impl<R: Reader> LineInstructions<R> {
+    /// Advance the iterator and return the next instruction.
+    ///
+    /// Returns the newly parsed instruction as `Ok(Some(instruction))`. Returns
+    /// `Ok(None)` when iteration is complete and all instructions have already been
+    /// parsed and yielded. If an error occurs while parsing the next attribute,
+    /// then this error is returned as `Err(e)`, and all subsequent calls return
+    /// `Ok(None)`.
+    ///
+    /// Unfortunately, the `header` parameter means that this cannot be a
+    /// `FallibleIterator`.
+    #[inline(always)]
+    pub fn next_instruction(
+        &mut self,
+        header: &LineProgramHeader<R>,
+    ) -> Result<Option<LineInstruction<R>>> {
+        if self.input.is_empty() {
+            return Ok(None);
+        }
+
+        match LineInstruction::parse(header, &mut self.input) {
+            Ok(instruction) => Ok(Some(instruction)),
+            Err(e) => {
+                self.input.empty();
+                Err(e)
+            }
+        }
+    }
+}
+
+/// Deprecated. `LineNumberRow` has been renamed to `LineRow`.
+#[deprecated(note = "LineNumberRow has been renamed to LineRow, use that instead.")]
+pub type LineNumberRow = LineRow;
+
+/// A row in the line number program's resulting matrix.
+///
+/// Each row is a copy of the registers of the state machine, as defined in section 6.2.2.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct LineRow {
+    tombstone: bool,
+    address: Wrapping<u64>,
+    op_index: Wrapping<u64>,
+    file: u64,
+    line: Wrapping<u64>,
+    column: u64,
+    is_stmt: bool,
+    basic_block: bool,
+    end_sequence: bool,
+    prologue_end: bool,
+    epilogue_begin: bool,
+    isa: u64,
+    discriminator: u64,
+}
+
+impl LineRow {
+    /// Create a line number row in the initial state for the given program.
+    pub fn new<R: Reader>(header: &LineProgramHeader<R>) -> Self {
+        LineRow {
+            // "At the beginning of each sequence within a line number program, the
+            // state of the registers is:" -- Section 6.2.2
+            tombstone: false,
+            address: Wrapping(0),
+            op_index: Wrapping(0),
+            file: 1,
+            line: Wrapping(1),
+            column: 0,
+            // "determined by default_is_stmt in the line number program header"
+            is_stmt: header.line_encoding.default_is_stmt,
+            basic_block: false,
+            end_sequence: false,
+            prologue_end: false,
+            epilogue_begin: false,
+            // "The isa value 0 specifies that the instruction set is the
+            // architecturally determined default instruction set. This may be fixed
+            // by the ABI, or it may be specified by other means, for example, by
+            // the object file description."
+            isa: 0,
+            discriminator: 0,
+        }
+    }
+
+    /// "The program-counter value corresponding to a machine instruction
+    /// generated by the compiler."
+    #[inline]
+    pub fn address(&self) -> u64 {
+        self.address.0
+    }
+
+    /// > An unsigned integer representing the index of an operation within a VLIW
+    /// > instruction. The index of the first operation is 0. For non-VLIW
+    /// > architectures, this register will always be 0.
+    /// >
+    /// > The address and op_index registers, taken together, form an operation
+    /// > pointer that can reference any individual operation with the
+    /// > instruction stream.
+    #[inline]
+    pub fn op_index(&self) -> u64 {
+        self.op_index.0
+    }
+
+    /// "An unsigned integer indicating the identity of the source file
+    /// corresponding to a machine instruction."
+    #[inline]
+    pub fn file_index(&self) -> u64 {
+        self.file
+    }
+
+    /// The source file corresponding to the current machine instruction.
+    #[inline]
+    pub fn file<'header, R: Reader>(
+        &self,
+        header: &'header LineProgramHeader<R>,
+    ) -> Option<&'header FileEntry<R>> {
+        header.file(self.file)
+    }
+
+    /// "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."
+    /// Line number values of 0 are represented as `None`.
+    #[inline]
+    pub fn line(&self) -> Option<NonZeroU64> {
+        NonZeroU64::new(self.line.0)
+    }
+
+    /// "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."
+    #[inline]
+    pub fn column(&self) -> ColumnType {
+        NonZeroU64::new(self.column)
+            .map(ColumnType::Column)
+            .unwrap_or(ColumnType::LeftEdge)
+    }
+
+    /// "A boolean indicating that the current instruction is a recommended
+    /// breakpoint location. A recommended breakpoint location is intended to
+    /// “represent” a line, a statement and/or a semantically distinct subpart
+    /// of a statement."
+    #[inline]
+    pub fn is_stmt(&self) -> bool {
+        self.is_stmt
+    }
+
+    /// "A boolean indicating that the current instruction is the beginning of a
+    /// basic block."
+    #[inline]
+    pub fn basic_block(&self) -> bool {
+        self.basic_block
+    }
+
+    /// "A boolean indicating that the current address is that of the first byte
+    /// after the end of a sequence of target machine instructions. end_sequence
+    /// terminates a sequence of lines; therefore other information in the same
+    /// row is not meaningful."
+    #[inline]
+    pub fn end_sequence(&self) -> bool {
+        self.end_sequence
+    }
+
+    /// "A boolean indicating that the current address is one (of possibly many)
+    /// where execution should be suspended for an entry breakpoint of a
+    /// function."
+    #[inline]
+    pub fn prologue_end(&self) -> bool {
+        self.prologue_end
+    }
+
+    /// "A boolean indicating that the current address is one (of possibly many)
+    /// where execution should be suspended for an exit breakpoint of a
+    /// function."
+    #[inline]
+    pub fn epilogue_begin(&self) -> bool {
+        self.epilogue_begin
+    }
+
+    /// Tag for the current instruction set architecture.
+    ///
+    /// > An unsigned integer whose value encodes the applicable instruction set
+    /// > architecture for the current instruction.
+    /// >
+    /// > The encoding of instruction sets should be shared by all users of a
+    /// > given architecture. It is recommended that this encoding be defined by
+    /// > the ABI authoring committee for each architecture.
+    #[inline]
+    pub fn isa(&self) -> u64 {
+        self.isa
+    }
+
+    /// "An unsigned integer identifying the block to which the current
+    /// instruction belongs. Discriminator values are assigned arbitrarily by
+    /// the DWARF producer and serve to distinguish among multiple blocks that
+    /// may all be associated with the same source file, line, and column. Where
+    /// only one block exists for a given source position, the discriminator
+    /// value should be zero."
+    #[inline]
+    pub fn discriminator(&self) -> u64 {
+        self.discriminator
+    }
+
+    /// Execute the given instruction, and return true if a new row in the
+    /// line number matrix needs to be generated.
+    ///
+    /// Unknown opcodes are treated as no-ops.
+    #[inline]
+    pub fn execute<R, Program>(
+        &mut self,
+        instruction: LineInstruction<R>,
+        program: &mut Program,
+    ) -> bool
+    where
+        Program: LineProgram<R>,
+        R: Reader,
+    {
+        match instruction {
+            LineInstruction::Special(opcode) => {
+                self.exec_special_opcode(opcode, program.header());
+                true
+            }
+
+            LineInstruction::Copy => true,
+
+            LineInstruction::AdvancePc(operation_advance) => {
+                self.apply_operation_advance(operation_advance, program.header());
+                false
+            }
+
+            LineInstruction::AdvanceLine(line_increment) => {
+                self.apply_line_advance(line_increment);
+                false
+            }
+
+            LineInstruction::SetFile(file) => {
+                self.file = file;
+                false
+            }
+
+            LineInstruction::SetColumn(column) => {
+                self.column = column;
+                false
+            }
+
+            LineInstruction::NegateStatement => {
+                self.is_stmt = !self.is_stmt;
+                false
+            }
+
+            LineInstruction::SetBasicBlock => {
+                self.basic_block = true;
+                false
+            }
+
+            LineInstruction::ConstAddPc => {
+                let adjusted = self.adjust_opcode(255, program.header());
+                let operation_advance = adjusted / program.header().line_encoding.line_range;
+                self.apply_operation_advance(u64::from(operation_advance), program.header());
+                false
+            }
+
+            LineInstruction::FixedAddPc(operand) => {
+                self.address += Wrapping(u64::from(operand));
+                self.op_index.0 = 0;
+                false
+            }
+
+            LineInstruction::SetPrologueEnd => {
+                self.prologue_end = true;
+                false
+            }
+
+            LineInstruction::SetEpilogueBegin => {
+                self.epilogue_begin = true;
+                false
+            }
+
+            LineInstruction::SetIsa(isa) => {
+                self.isa = isa;
+                false
+            }
+
+            LineInstruction::EndSequence => {
+                self.end_sequence = true;
+                true
+            }
+
+            LineInstruction::SetAddress(address) => {
+                let tombstone_address = !0 >> (64 - program.header().encoding.address_size * 8);
+                self.tombstone = address == tombstone_address;
+                self.address.0 = address;
+                self.op_index.0 = 0;
+                false
+            }
+
+            LineInstruction::DefineFile(entry) => {
+                program.add_file(entry);
+                false
+            }
+
+            LineInstruction::SetDiscriminator(discriminator) => {
+                self.discriminator = discriminator;
+                false
+            }
+
+            // Compatibility with future opcodes.
+            LineInstruction::UnknownStandard0(_)
+            | LineInstruction::UnknownStandard1(_, _)
+            | LineInstruction::UnknownStandardN(_, _)
+            | LineInstruction::UnknownExtended(_, _) => false,
+        }
+    }
+
+    /// Perform any reset that was required after copying the previous row.
+    #[inline]
+    pub fn reset<R: Reader>(&mut self, header: &LineProgramHeader<R>) {
+        if self.end_sequence {
+            // Previous instruction was EndSequence, so reset everything
+            // as specified in Section 6.2.5.3.
+            *self = Self::new(header);
+        } else {
+            // Previous instruction was one of:
+            // - Special - specified in Section 6.2.5.1, steps 4-7
+            // - Copy - specified in Section 6.2.5.2
+            // The reset behaviour is the same in both cases.
+            self.discriminator = 0;
+            self.basic_block = false;
+            self.prologue_end = false;
+            self.epilogue_begin = false;
+        }
+    }
+
+    /// Step 1 of section 6.2.5.1
+    fn apply_line_advance(&mut self, line_increment: i64) {
+        if line_increment < 0 {
+            let decrement = -line_increment as u64;
+            if decrement <= self.line.0 {
+                self.line.0 -= decrement;
+            } else {
+                self.line.0 = 0;
+            }
+        } else {
+            self.line += Wrapping(line_increment as u64);
+        }
+    }
+
+    /// Step 2 of section 6.2.5.1
+    fn apply_operation_advance<R: Reader>(
+        &mut self,
+        operation_advance: u64,
+        header: &LineProgramHeader<R>,
+    ) {
+        let operation_advance = Wrapping(operation_advance);
+
+        let minimum_instruction_length = u64::from(header.line_encoding.minimum_instruction_length);
+        let minimum_instruction_length = Wrapping(minimum_instruction_length);
+
+        let maximum_operations_per_instruction =
+            u64::from(header.line_encoding.maximum_operations_per_instruction);
+        let maximum_operations_per_instruction = Wrapping(maximum_operations_per_instruction);
+
+        if maximum_operations_per_instruction.0 == 1 {
+            self.address += minimum_instruction_length * operation_advance;
+            self.op_index.0 = 0;
+        } else {
+            let op_index_with_advance = self.op_index + operation_advance;
+            self.address += minimum_instruction_length
+                * (op_index_with_advance / maximum_operations_per_instruction);
+            self.op_index = op_index_with_advance % maximum_operations_per_instruction;
+        }
+    }
+
+    #[inline]
+    fn adjust_opcode<R: Reader>(&self, opcode: u8, header: &LineProgramHeader<R>) -> u8 {
+        opcode - header.opcode_base
+    }
+
+    /// Section 6.2.5.1
+    fn exec_special_opcode<R: Reader>(&mut self, opcode: u8, header: &LineProgramHeader<R>) {
+        let adjusted_opcode = self.adjust_opcode(opcode, header);
+
+        let line_range = header.line_encoding.line_range;
+        let line_advance = adjusted_opcode % line_range;
+        let operation_advance = adjusted_opcode / line_range;
+
+        // Step 1
+        let line_base = i64::from(header.line_encoding.line_base);
+        self.apply_line_advance(line_base + i64::from(line_advance));
+
+        // Step 2
+        self.apply_operation_advance(u64::from(operation_advance), header);
+    }
+}
+
+/// The type of column that a row is referring to.
+#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub enum ColumnType {
+    /// The `LeftEdge` means that the statement begins at the start of the new
+    /// line.
+    LeftEdge,
+    /// A column number, whose range begins at 1.
+    Column(NonZeroU64),
+}
+
+/// Deprecated. `LineNumberSequence` has been renamed to `LineSequence`.
+#[deprecated(note = "LineNumberSequence has been renamed to LineSequence, use that instead.")]
+pub type LineNumberSequence<R> = LineSequence<R>;
+
+/// A sequence within a line number program.  A sequence, as defined in section
+/// 6.2.5 of the standard, is a linear subset of a line number program within
+/// which addresses are monotonically increasing.
+#[derive(Clone, Debug)]
+pub struct LineSequence<R: Reader> {
+    /// The first address that is covered by this sequence within the line number
+    /// program.
+    pub start: u64,
+    /// The first address that is *not* covered by this sequence within the line
+    /// number program.
+    pub end: u64,
+    instructions: LineInstructions<R>,
+}
+
+/// Deprecated. `LineNumberProgramHeader` has been renamed to `LineProgramHeader`.
+#[deprecated(
+    note = "LineNumberProgramHeader has been renamed to LineProgramHeader, use that instead."
+)]
+pub type LineNumberProgramHeader<R, Offset> = LineProgramHeader<R, Offset>;
+
+/// A header for a line number program in the `.debug_line` section, as defined
+/// in section 6.2.4 of the standard.
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct LineProgramHeader<R, Offset = <R as Reader>::Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    encoding: Encoding,
+    offset: DebugLineOffset<Offset>,
+    unit_length: Offset,
+
+    header_length: Offset,
+
+    line_encoding: LineEncoding,
+
+    /// "The number assigned to the first special opcode."
+    opcode_base: u8,
+
+    /// "This array specifies the number of LEB128 operands for each of the
+    /// standard opcodes. The first element of the array corresponds to the
+    /// opcode whose value is 1, and the last element corresponds to the opcode
+    /// whose value is `opcode_base - 1`."
+    standard_opcode_lengths: R,
+
+    /// "A sequence of directory entry format descriptions."
+    directory_entry_format: Vec<FileEntryFormat>,
+
+    /// > Entries in this sequence describe each path that was searched for
+    /// > included source files in this compilation. (The paths include those
+    /// > directories specified explicitly by the user for the compiler to search
+    /// > and those the compiler searches without explicit direction.) Each path
+    /// > entry is either a full path name or is relative to the current directory
+    /// > of the compilation.
+    /// >
+    /// > The last entry is followed by a single null byte.
+    include_directories: Vec<AttributeValue<R, Offset>>,
+
+    /// "A sequence of file entry format descriptions."
+    file_name_entry_format: Vec<FileEntryFormat>,
+
+    /// "Entries in this sequence describe source files that contribute to the
+    /// line number information for this compilation unit or is used in other
+    /// contexts."
+    file_names: Vec<FileEntry<R, Offset>>,
+
+    /// The encoded line program instructions.
+    program_buf: R,
+
+    /// The current directory of the compilation.
+    comp_dir: Option<R>,
+
+    /// The primary source file.
+    comp_file: Option<FileEntry<R, Offset>>,
+}
+
+impl<R, Offset> LineProgramHeader<R, Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    /// Return the offset of the line number program header in the `.debug_line` section.
+    pub fn offset(&self) -> DebugLineOffset<R::Offset> {
+        self.offset
+    }
+
+    /// Return the length of the line number program and header, not including
+    /// the length of the encoded length itself.
+    pub fn unit_length(&self) -> R::Offset {
+        self.unit_length
+    }
+
+    /// Return the encoding parameters for this header's line program.
+    pub fn encoding(&self) -> Encoding {
+        self.encoding
+    }
+
+    /// Get the version of this header's line program.
+    pub fn version(&self) -> u16 {
+        self.encoding.version
+    }
+
+    /// Get the length of the encoded line number program header, not including
+    /// the length of the encoded length itself.
+    pub fn header_length(&self) -> R::Offset {
+        self.header_length
+    }
+
+    /// Get the size in bytes of a target machine address.
+    pub fn address_size(&self) -> u8 {
+        self.encoding.address_size
+    }
+
+    /// Whether this line program is encoded in 64- or 32-bit DWARF.
+    pub fn format(&self) -> Format {
+        self.encoding.format
+    }
+
+    /// Get the line encoding parameters for this header's line program.
+    pub fn line_encoding(&self) -> LineEncoding {
+        self.line_encoding
+    }
+
+    /// Get the minimum instruction length any instruction in this header's line
+    /// program may have.
+    pub fn minimum_instruction_length(&self) -> u8 {
+        self.line_encoding.minimum_instruction_length
+    }
+
+    /// Get the maximum number of operations each instruction in this header's
+    /// line program may have.
+    pub fn maximum_operations_per_instruction(&self) -> u8 {
+        self.line_encoding.maximum_operations_per_instruction
+    }
+
+    /// Get the default value of the `is_stmt` register for this header's line
+    /// program.
+    pub fn default_is_stmt(&self) -> bool {
+        self.line_encoding.default_is_stmt
+    }
+
+    /// Get the line base for this header's line program.
+    pub fn line_base(&self) -> i8 {
+        self.line_encoding.line_base
+    }
+
+    /// Get the line range for this header's line program.
+    pub fn line_range(&self) -> u8 {
+        self.line_encoding.line_range
+    }
+
+    /// Get opcode base for this header's line program.
+    pub fn opcode_base(&self) -> u8 {
+        self.opcode_base
+    }
+
+    /// An array of `u8` that specifies the number of LEB128 operands for
+    /// each of the standard opcodes.
+    pub fn standard_opcode_lengths(&self) -> &R {
+        &self.standard_opcode_lengths
+    }
+
+    /// Get the format of a directory entry.
+    pub fn directory_entry_format(&self) -> &[FileEntryFormat] {
+        &self.directory_entry_format[..]
+    }
+
+    /// Get the set of include directories for this header's line program.
+    ///
+    /// For DWARF version <= 4, the compilation's current directory is not included
+    /// in the return value, but is implicitly considered to be in the set per spec.
+    pub fn include_directories(&self) -> &[AttributeValue<R, Offset>] {
+        &self.include_directories[..]
+    }
+
+    /// The include directory with the given directory index.
+    ///
+    /// A directory index of 0 corresponds to the compilation unit directory.
+    pub fn directory(&self, directory: u64) -> Option<AttributeValue<R, Offset>> {
+        if self.encoding.version <= 4 {
+            if directory == 0 {
+                self.comp_dir.clone().map(AttributeValue::String)
+            } else {
+                let directory = directory as usize - 1;
+                self.include_directories.get(directory).cloned()
+            }
+        } else {
+            self.include_directories.get(directory as usize).cloned()
+        }
+    }
+
+    /// Get the format of a file name entry.
+    pub fn file_name_entry_format(&self) -> &[FileEntryFormat] {
+        &self.file_name_entry_format[..]
+    }
+
+    /// Return true if the file entries may have valid timestamps.
+    ///
+    /// Only returns false if we definitely know that all timestamp fields
+    /// are invalid.
+    pub fn file_has_timestamp(&self) -> bool {
+        self.encoding.version <= 4
+            || self
+                .file_name_entry_format
+                .iter()
+                .any(|x| x.content_type == constants::DW_LNCT_timestamp)
+    }
+
+    /// Return true if the file entries may have valid sizes.
+    ///
+    /// Only returns false if we definitely know that all size fields
+    /// are invalid.
+    pub fn file_has_size(&self) -> bool {
+        self.encoding.version <= 4
+            || self
+                .file_name_entry_format
+                .iter()
+                .any(|x| x.content_type == constants::DW_LNCT_size)
+    }
+
+    /// Return true if the file name entry format contains an MD5 field.
+    pub fn file_has_md5(&self) -> bool {
+        self.file_name_entry_format
+            .iter()
+            .any(|x| x.content_type == constants::DW_LNCT_MD5)
+    }
+
+    /// Get the list of source files that appear in this header's line program.
+    pub fn file_names(&self) -> &[FileEntry<R, Offset>] {
+        &self.file_names[..]
+    }
+
+    /// The source file with the given file index.
+    ///
+    /// A file index of 0 corresponds to the compilation unit file.
+    /// Note that a file index of 0 is invalid for DWARF version <= 4,
+    /// but we support it anyway.
+    pub fn file(&self, file: u64) -> Option<&FileEntry<R, Offset>> {
+        if self.encoding.version <= 4 {
+            if file == 0 {
+                self.comp_file.as_ref()
+            } else {
+                let file = file as usize - 1;
+                self.file_names.get(file)
+            }
+        } else {
+            self.file_names.get(file as usize)
+        }
+    }
+
+    /// Get the raw, un-parsed `EndianSlice` containing this header's line number
+    /// program.
+    ///
+    /// ```
+    /// # fn foo() {
+    /// use gimli::{LineProgramHeader, EndianSlice, NativeEndian};
+    ///
+    /// fn get_line_number_program_header<'a>() -> LineProgramHeader<EndianSlice<'a, NativeEndian>> {
+    ///     // Get a line number program header from some offset in a
+    ///     // `.debug_line` section...
+    /// #   unimplemented!()
+    /// }
+    ///
+    /// let header = get_line_number_program_header();
+    /// let raw_program = header.raw_program_buf();
+    /// println!("The length of the raw program in bytes is {}", raw_program.len());
+    /// # }
+    /// ```
+    pub fn raw_program_buf(&self) -> R {
+        self.program_buf.clone()
+    }
+
+    /// Iterate over the instructions in this header's line number program, parsing
+    /// them as we go.
+    pub fn instructions(&self) -> LineInstructions<R> {
+        LineInstructions {
+            input: self.program_buf.clone(),
+        }
+    }
+
+    fn parse(
+        input: &mut R,
+        offset: DebugLineOffset<Offset>,
+        mut address_size: u8,
+        mut comp_dir: Option<R>,
+        comp_name: Option<R>,
+    ) -> Result<LineProgramHeader<R, Offset>> {
+        let (unit_length, format) = input.read_initial_length()?;
+        let rest = &mut input.split(unit_length)?;
+
+        let version = rest.read_u16()?;
+        if version < 2 || version > 5 {
+            return Err(Error::UnknownVersion(u64::from(version)));
+        }
+
+        if version >= 5 {
+            address_size = rest.read_u8()?;
+            let segment_selector_size = rest.read_u8()?;
+            if segment_selector_size != 0 {
+                return Err(Error::UnsupportedSegmentSize);
+            }
+        }
+
+        let encoding = Encoding {
+            format,
+            version,
+            address_size,
+        };
+
+        let header_length = rest.read_length(format)?;
+
+        let mut program_buf = rest.clone();
+        program_buf.skip(header_length)?;
+        rest.truncate(header_length)?;
+
+        let minimum_instruction_length = rest.read_u8()?;
+        if minimum_instruction_length == 0 {
+            return Err(Error::MinimumInstructionLengthZero);
+        }
+
+        // This field did not exist before DWARF 4, but is specified to be 1 for
+        // non-VLIW architectures, which makes it a no-op.
+        let maximum_operations_per_instruction = if version >= 4 { rest.read_u8()? } else { 1 };
+        if maximum_operations_per_instruction == 0 {
+            return Err(Error::MaximumOperationsPerInstructionZero);
+        }
+
+        let default_is_stmt = rest.read_u8()? != 0;
+        let line_base = rest.read_i8()?;
+        let line_range = rest.read_u8()?;
+        if line_range == 0 {
+            return Err(Error::LineRangeZero);
+        }
+        let line_encoding = LineEncoding {
+            minimum_instruction_length,
+            maximum_operations_per_instruction,
+            default_is_stmt,
+            line_base,
+            line_range,
+        };
+
+        let opcode_base = rest.read_u8()?;
+        if opcode_base == 0 {
+            return Err(Error::OpcodeBaseZero);
+        }
+
+        let standard_opcode_count = R::Offset::from_u8(opcode_base - 1);
+        let standard_opcode_lengths = rest.split(standard_opcode_count)?;
+
+        let directory_entry_format;
+        let mut include_directories = Vec::new();
+        if version <= 4 {
+            directory_entry_format = Vec::new();
+            loop {
+                let directory = rest.read_null_terminated_slice()?;
+                if directory.is_empty() {
+                    break;
+                }
+                include_directories.push(AttributeValue::String(directory));
+            }
+        } else {
+            comp_dir = None;
+            directory_entry_format = FileEntryFormat::parse(rest)?;
+            let count = rest.read_uleb128()?;
+            for _ in 0..count {
+                include_directories.push(parse_directory_v5(
+                    rest,
+                    encoding,
+                    &directory_entry_format,
+                )?);
+            }
+        }
+
+        let comp_file;
+        let file_name_entry_format;
+        let mut file_names = Vec::new();
+        if version <= 4 {
+            comp_file = comp_name.map(|name| FileEntry {
+                path_name: AttributeValue::String(name),
+                directory_index: 0,
+                timestamp: 0,
+                size: 0,
+                md5: [0; 16],
+            });
+
+            file_name_entry_format = Vec::new();
+            loop {
+                let path_name = rest.read_null_terminated_slice()?;
+                if path_name.is_empty() {
+                    break;
+                }
+                file_names.push(FileEntry::parse(rest, path_name)?);
+            }
+        } else {
+            comp_file = None;
+            file_name_entry_format = FileEntryFormat::parse(rest)?;
+            let count = rest.read_uleb128()?;
+            for _ in 0..count {
+                file_names.push(parse_file_v5(rest, encoding, &file_name_entry_format)?);
+            }
+        }
+
+        let header = LineProgramHeader {
+            encoding,
+            offset,
+            unit_length,
+            header_length,
+            line_encoding,
+            opcode_base,
+            standard_opcode_lengths,
+            directory_entry_format,
+            include_directories,
+            file_name_entry_format,
+            file_names,
+            program_buf,
+            comp_dir,
+            comp_file,
+        };
+        Ok(header)
+    }
+}
+
+/// Deprecated. `IncompleteLineNumberProgram` has been renamed to `IncompleteLineProgram`.
+#[deprecated(
+    note = "IncompleteLineNumberProgram has been renamed to IncompleteLineProgram, use that instead."
+)]
+pub type IncompleteLineNumberProgram<R, Offset> = IncompleteLineProgram<R, Offset>;
+
+/// A line number program that has not been run to completion.
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct IncompleteLineProgram<R, Offset = <R as Reader>::Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    header: LineProgramHeader<R, Offset>,
+}
+
+impl<R, Offset> IncompleteLineProgram<R, Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    /// Retrieve the `LineProgramHeader` for this program.
+    pub fn header(&self) -> &LineProgramHeader<R, Offset> {
+        &self.header
+    }
+
+    /// Construct a new `LineRows` for executing this program to iterate
+    /// over rows in the line information matrix.
+    pub fn rows(self) -> OneShotLineRows<R, Offset> {
+        OneShotLineRows::new(self)
+    }
+
+    /// Execute the line number program, completing the `IncompleteLineProgram`
+    /// into a `CompleteLineProgram` and producing an array of sequences within
+    /// the line number program that can later be used with
+    /// `CompleteLineProgram::resume_from`.
+    ///
+    /// ```
+    /// # fn foo() {
+    /// use gimli::{IncompleteLineProgram, EndianSlice, NativeEndian};
+    ///
+    /// fn get_line_number_program<'a>() -> IncompleteLineProgram<EndianSlice<'a, NativeEndian>> {
+    ///     // Get a line number program from some offset in a
+    ///     // `.debug_line` section...
+    /// #   unimplemented!()
+    /// }
+    ///
+    /// let program = get_line_number_program();
+    /// let (program, sequences) = program.sequences().unwrap();
+    /// println!("There are {} sequences in this line number program", sequences.len());
+    /// # }
+    /// ```
+    #[allow(clippy::type_complexity)]
+    pub fn sequences(self) -> Result<(CompleteLineProgram<R, Offset>, Vec<LineSequence<R>>)> {
+        let mut sequences = Vec::new();
+        let mut rows = self.rows();
+        let mut instructions = rows.instructions.clone();
+        let mut sequence_start_addr = None;
+        loop {
+            let sequence_end_addr;
+            if rows.next_row()?.is_none() {
+                break;
+            }
+
+            let row = &rows.row;
+            if row.end_sequence() {
+                sequence_end_addr = row.address();
+            } else if sequence_start_addr.is_none() {
+                sequence_start_addr = Some(row.address());
+                continue;
+            } else {
+                continue;
+            }
+
+            // We just finished a sequence.
+            sequences.push(LineSequence {
+                // In theory one could have multiple DW_LNE_end_sequence instructions
+                // in a row.
+                start: sequence_start_addr.unwrap_or(0),
+                end: sequence_end_addr,
+                instructions: instructions.remove_trailing(&rows.instructions)?,
+            });
+            sequence_start_addr = None;
+            instructions = rows.instructions.clone();
+        }
+
+        let program = CompleteLineProgram {
+            header: rows.program.header,
+        };
+        Ok((program, sequences))
+    }
+}
+
+/// Deprecated. `CompleteLineNumberProgram` has been renamed to `CompleteLineProgram`.
+#[deprecated(
+    note = "CompleteLineNumberProgram has been renamed to CompleteLineProgram, use that instead."
+)]
+pub type CompleteLineNumberProgram<R, Offset> = CompleteLineProgram<R, Offset>;
+
+/// A line number program that has previously been run to completion.
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct CompleteLineProgram<R, Offset = <R as Reader>::Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    header: LineProgramHeader<R, Offset>,
+}
+
+impl<R, Offset> CompleteLineProgram<R, Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    /// Retrieve the `LineProgramHeader` for this program.
+    pub fn header(&self) -> &LineProgramHeader<R, Offset> {
+        &self.header
+    }
+
+    /// Construct a new `LineRows` for executing the subset of the line
+    /// number program identified by 'sequence' and  generating the line information
+    /// matrix.
+    ///
+    /// ```
+    /// # fn foo() {
+    /// use gimli::{IncompleteLineProgram, EndianSlice, NativeEndian};
+    ///
+    /// fn get_line_number_program<'a>() -> IncompleteLineProgram<EndianSlice<'a, NativeEndian>> {
+    ///     // Get a line number program from some offset in a
+    ///     // `.debug_line` section...
+    /// #   unimplemented!()
+    /// }
+    ///
+    /// let program = get_line_number_program();
+    /// let (program, sequences) = program.sequences().unwrap();
+    /// for sequence in &sequences {
+    ///     let mut sm = program.resume_from(sequence);
+    /// }
+    /// # }
+    /// ```
+    pub fn resume_from<'program>(
+        &'program self,
+        sequence: &LineSequence<R>,
+    ) -> ResumedLineRows<'program, R, Offset> {
+        ResumedLineRows::resume(self, sequence)
+    }
+}
+
+/// An entry in the `LineProgramHeader`'s `file_names` set.
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub struct FileEntry<R, Offset = <R as Reader>::Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    path_name: AttributeValue<R, Offset>,
+    directory_index: u64,
+    timestamp: u64,
+    size: u64,
+    md5: [u8; 16],
+}
+
+impl<R, Offset> FileEntry<R, Offset>
+where
+    R: Reader<Offset = Offset>,
+    Offset: ReaderOffset,
+{
+    // version 2-4
+    fn parse(input: &mut R, path_name: R) -> Result<FileEntry<R, Offset>> {
+        let directory_index = input.read_uleb128()?;
+        let timestamp = input.read_uleb128()?;
+        let size = input.read_uleb128()?;
+
+        let entry = FileEntry {
+            path_name: AttributeValue::String(path_name),
+            directory_index,
+            timestamp,
+            size,
+            md5: [0; 16],
+        };
+
+        Ok(entry)
+    }
+
+    /// > A slice containing the full or relative path name of
+    /// > a source file. If the entry contains a file name or a relative path
+    /// > name, the file is located relative to either the compilation directory
+    /// > (as specified by the DW_AT_comp_dir attribute given in the compilation
+    /// > unit) or one of the directories in the include_directories section.
+    pub fn path_name(&self) -> AttributeValue<R, Offset> {
+        self.path_name.clone()
+    }
+
+    /// > An unsigned LEB128 number representing the directory index of the
+    /// > directory in which the file was found.
+    /// >
+    /// > ...
+    /// >
+    /// > The directory index represents an entry in the include_directories
+    /// > section of the line number program header. The index is 0 if the file
+    /// > was found in the current directory of the compilation, 1 if it was found
+    /// > in the first directory in the include_directories section, and so
+    /// > on. The directory index is ignored for file names that represent full
+    /// > path names.
+    pub fn directory_index(&self) -> u64 {
+        self.directory_index
+    }
+
+    /// Get this file's directory.
+    ///
+    /// A directory index of 0 corresponds to the compilation unit directory.
+    pub fn directory(&self, header: &LineProgramHeader<R>) -> Option<AttributeValue<R, Offset>> {
+        header.directory(self.directory_index)
+    }
+
+    /// The implementation-defined time of last modification of the file,
+    /// or 0 if not available.
+    pub fn timestamp(&self) -> u64 {
+        self.timestamp
+    }
+
+    /// "An unsigned LEB128 number representing the time of last modification of
+    /// the file, or 0 if not available."
+    // Terminology changed in DWARF version 5.
+    #[doc(hidden)]
+    pub fn last_modification(&self) -> u64 {
+        self.timestamp
+    }
+
+    /// The size of the file in bytes, or 0 if not available.
+    pub fn size(&self) -> u64 {
+        self.size
+    }
+
+    /// "An unsigned LEB128 number representing the length in bytes of the file,
+    /// or 0 if not available."
+    // Terminology changed in DWARF version 5.
+    #[doc(hidden)]
+    pub fn length(&self) -> u64 {
+        self.size
+    }
+
+    /// A 16-byte MD5 digest of the file contents.
+    ///
+    /// Only valid if `LineProgramHeader::file_has_md5` returns `true`.
+    pub fn md5(&self) -> &[u8; 16] {
+        &self.md5
+    }
+}
+
+/// The format of a component of an include directory or file name entry.
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub struct FileEntryFormat {
+    /// The type of information that is represented by the component.
+    pub content_type: constants::DwLnct,
+
+    /// The encoding form of the component value.
+    pub form: constants::DwForm,
+}
+
+impl FileEntryFormat {
+    fn parse<R: Reader>(input: &mut R) -> Result<Vec<FileEntryFormat>> {
+        let format_count = input.read_u8()? as usize;
+        let mut format = Vec::with_capacity(format_count);
+        let mut path_count = 0;
+        for _ in 0..format_count {
+            let content_type = input.read_uleb128()?;
+            let content_type = if content_type > u64::from(u16::max_value()) {
+                constants::DwLnct(u16::max_value())
+            } else {
+                constants::DwLnct(content_type as u16)
+            };
+            if content_type == constants::DW_LNCT_path {
+                path_count += 1;
+            }
+
+            let form = constants::DwForm(input.read_uleb128_u16()?);
+
+            format.push(FileEntryFormat { content_type, form });
+        }
+        if path_count != 1 {
+            return Err(Error::MissingFileEntryFormatPath);
+        }
+        Ok(format)
+    }
+}
+
+fn parse_directory_v5<R: Reader>(
+    input: &mut R,
+    encoding: Encoding,
+    formats: &[FileEntryFormat],
+) -> Result<AttributeValue<R>> {
+    let mut path_name = None;
+
+    for format in formats {
+        let value = parse_attribute(input, encoding, format.form)?;
+        if format.content_type == constants::DW_LNCT_path {
+            path_name = Some(value);
+        }
+    }
+
+    Ok(path_name.unwrap())
+}
+
+fn parse_file_v5<R: Reader>(
+    input: &mut R,
+    encoding: Encoding,
+    formats: &[FileEntryFormat],
+) -> Result<FileEntry<R>> {
+    let mut path_name = None;
+    let mut directory_index = 0;
+    let mut timestamp = 0;
+    let mut size = 0;
+    let mut md5 = [0; 16];
+
+    for format in formats {
+        let value = parse_attribute(input, encoding, format.form)?;
+        match format.content_type {
+            constants::DW_LNCT_path => path_name = Some(value),
+            constants::DW_LNCT_directory_index => {
+                if let Some(value) = value.udata_value() {
+                    directory_index = value;
+                }
+            }
+            constants::DW_LNCT_timestamp => {
+                if let Some(value) = value.udata_value() {
+                    timestamp = value;
+                }
+            }
+            constants::DW_LNCT_size => {
+                if let Some(value) = value.udata_value() {
+                    size = value;
+                }
+            }
+            constants::DW_LNCT_MD5 => {
+                if let AttributeValue::Block(mut value) = value {
+                    if value.len().into_u64() == 16 {
+                        md5 = value.read_u8_array()?;
+                    }
+                }
+            }
+            // Ignore unknown content types.
+            _ => {}
+        }
+    }
+
+    Ok(FileEntry {
+        path_name: path_name.unwrap(),
+        directory_index,
+        timestamp,
+        size,
+        md5,
+    })
+}
+
+// TODO: this should be shared with unit::parse_attribute(), but that is hard to do.
+fn parse_attribute<R: Reader>(
+    input: &mut R,
+    encoding: Encoding,
+    form: constants::DwForm,
+) -> Result<AttributeValue<R>> {
+    Ok(match form {
+        constants::DW_FORM_block1 => {
+            let len = input.read_u8().map(R::Offset::from_u8)?;
+            let block = input.split(len)?;
+            AttributeValue::Block(block)
+        }
+        constants::DW_FORM_block2 => {
+            let len = input.read_u16().map(R::Offset::from_u16)?;
+            let block = input.split(len)?;
+            AttributeValue::Block(block)
+        }
+        constants::DW_FORM_block4 => {
+            let len = input.read_u32().map(R::Offset::from_u32)?;
+            let block = input.split(len)?;
+            AttributeValue::Block(block)
+        }
+        constants::DW_FORM_block => {
+            let len = input.read_uleb128().and_then(R::Offset::from_u64)?;
+            let block = input.split(len)?;
+            AttributeValue::Block(block)
+        }
+        constants::DW_FORM_data1 => {
+            let data = input.read_u8()?;
+            AttributeValue::Data1(data)
+        }
+        constants::DW_FORM_data2 => {
+            let data = input.read_u16()?;
+            AttributeValue::Data2(data)
+        }
+        constants::DW_FORM_data4 => {
+            let data = input.read_u32()?;
+            AttributeValue::Data4(data)
+        }
+        constants::DW_FORM_data8 => {
+            let data = input.read_u64()?;
+            AttributeValue::Data8(data)
+        }
+        constants::DW_FORM_data16 => {
+            let block = input.split(R::Offset::from_u8(16))?;
+            AttributeValue::Block(block)
+        }
+        constants::DW_FORM_udata => {
+            let data = input.read_uleb128()?;
+            AttributeValue::Udata(data)
+        }
+        constants::DW_FORM_sdata => {
+            let data = input.read_sleb128()?;
+            AttributeValue::Sdata(data)
+        }
+        constants::DW_FORM_flag => {
+            let present = input.read_u8()?;
+            AttributeValue::Flag(present != 0)
+        }
+        constants::DW_FORM_sec_offset => {
+            let offset = input.read_offset(encoding.format)?;
+            AttributeValue::SecOffset(offset)
+        }
+        constants::DW_FORM_string => {
+            let string = input.read_null_terminated_slice()?;
+            AttributeValue::String(string)
+        }
+        constants::DW_FORM_strp => {
+            let offset = input.read_offset(encoding.format)?;
+            AttributeValue::DebugStrRef(DebugStrOffset(offset))
+        }
+        constants::DW_FORM_strp_sup | constants::DW_FORM_GNU_strp_alt => {
+            let offset = input.read_offset(encoding.format)?;
+            AttributeValue::DebugStrRefSup(DebugStrOffset(offset))
+        }
+        constants::DW_FORM_line_strp => {
+            let offset = input.read_offset(encoding.format)?;
+            AttributeValue::DebugLineStrRef(DebugLineStrOffset(offset))
+        }
+        constants::DW_FORM_strx | constants::DW_FORM_GNU_str_index => {
+            let index = input.read_uleb128().and_then(R::Offset::from_u64)?;
+            AttributeValue::DebugStrOffsetsIndex(DebugStrOffsetsIndex(index))
+        }
+        constants::DW_FORM_strx1 => {
+            let index = input.read_u8().map(R::Offset::from_u8)?;
+            AttributeValue::DebugStrOffsetsIndex(DebugStrOffsetsIndex(index))
+        }
+        constants::DW_FORM_strx2 => {
+            let index = input.read_u16().map(R::Offset::from_u16)?;
+            AttributeValue::DebugStrOffsetsIndex(DebugStrOffsetsIndex(index))
+        }
+        constants::DW_FORM_strx3 => {
+            let index = input.read_uint(3).and_then(R::Offset::from_u64)?;
+            AttributeValue::DebugStrOffsetsIndex(DebugStrOffsetsIndex(index))
+        }
+        constants::DW_FORM_strx4 => {
+            let index = input.read_u32().map(R::Offset::from_u32)?;
+            AttributeValue::DebugStrOffsetsIndex(DebugStrOffsetsIndex(index))
+        }
+        _ => {
+            return Err(Error::UnknownForm);
+        }
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::constants;
+    use crate::endianity::LittleEndian;
+    use crate::read::{EndianSlice, Error};
+    use crate::test_util::GimliSectionMethods;
+    use core::u64;
+    use core::u8;
+    use test_assembler::{Endian, Label, LabelMaker, Section};
+
+    #[test]
+    fn test_parse_debug_line_32_ok() {
+        #[rustfmt::skip]
+        let buf = [
+            // 32-bit length = 62.
+            0x3e, 0x00, 0x00, 0x00,
+            // Version.
+            0x04, 0x00,
+            // Header length = 40.
+            0x28, 0x00, 0x00, 0x00,
+            // Minimum instruction length.
+            0x01,
+            // Maximum operations per byte.
+            0x01,
+            // Default is_stmt.
+            0x01,
+            // Line base.
+            0x00,
+            // Line range.
+            0x01,
+            // Opcode base.
+            0x03,
+            // Standard opcode lengths for opcodes 1 .. opcode base - 1.
+            0x01, 0x02,
+            // Include directories = '/', 'i', 'n', 'c', '\0', '/', 'i', 'n', 'c', '2', '\0', '\0'
+            0x2f, 0x69, 0x6e, 0x63, 0x00, 0x2f, 0x69, 0x6e, 0x63, 0x32, 0x00, 0x00,
+            // File names
+                // foo.rs
+                0x66, 0x6f, 0x6f, 0x2e, 0x72, 0x73, 0x00,
+                0x00,
+                0x00,
+                0x00,
+                // bar.h
+                0x62, 0x61, 0x72, 0x2e, 0x68, 0x00,
+                0x01,
+                0x00,
+                0x00,
+            // End file names.
+            0x00,
+
+            // Dummy line program data.
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+
+            // Dummy next line program.
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+        ];
+
+        let rest = &mut EndianSlice::new(&buf, LittleEndian);
+        let comp_dir = EndianSlice::new(b"/comp_dir", LittleEndian);
+        let comp_name = EndianSlice::new(b"/comp_name", LittleEndian);
+
+        let header =
+            LineProgramHeader::parse(rest, DebugLineOffset(0), 4, Some(comp_dir), Some(comp_name))
+                .expect("should parse header ok");
+
+        assert_eq!(
+            *rest,
+            EndianSlice::new(&buf[buf.len() - 16..], LittleEndian)
+        );
+
+        assert_eq!(header.offset, DebugLineOffset(0));
+        assert_eq!(header.version(), 4);
+        assert_eq!(header.minimum_instruction_length(), 1);
+        assert_eq!(header.maximum_operations_per_instruction(), 1);
+        assert_eq!(header.default_is_stmt(), true);
+        assert_eq!(header.line_base(), 0);
+        assert_eq!(header.line_range(), 1);
+        assert_eq!(header.opcode_base(), 3);
+        assert_eq!(header.directory(0), Some(AttributeValue::String(comp_dir)));
+        assert_eq!(
+            header.file(0).unwrap().path_name,
+            AttributeValue::String(comp_name)
+        );
+
+        let expected_lengths = [1, 2];
+        assert_eq!(header.standard_opcode_lengths().slice(), &expected_lengths);
+
+        let expected_include_directories = [
+            AttributeValue::String(EndianSlice::new(b"/inc", LittleEndian)),
+            AttributeValue::String(EndianSlice::new(b"/inc2", LittleEndian)),
+        ];
+        assert_eq!(header.include_directories(), &expected_include_directories);
+
+        let expected_file_names = [
+            FileEntry {
+                path_name: AttributeValue::String(EndianSlice::new(b"foo.rs", LittleEndian)),
+                directory_index: 0,
+                timestamp: 0,
+                size: 0,
+                md5: [0; 16],
+            },
+            FileEntry {
+                path_name: AttributeValue::String(EndianSlice::new(b"bar.h", LittleEndian)),
+                directory_index: 1,
+                timestamp: 0,
+                size: 0,
+                md5: [0; 16],
+            },
+        ];
+        assert_eq!(&*header.file_names(), &expected_file_names);
+    }
+
+    #[test]
+    fn test_parse_debug_line_header_length_too_short() {
+        #[rustfmt::skip]
+        let buf = [
+            // 32-bit length = 62.
+            0x3e, 0x00, 0x00, 0x00,
+            // Version.
+            0x04, 0x00,
+            // Header length = 20. TOO SHORT!!!
+            0x15, 0x00, 0x00, 0x00,
+            // Minimum instruction length.
+            0x01,
+            // Maximum operations per byte.
+            0x01,
+            // Default is_stmt.
+            0x01,
+            // Line base.
+            0x00,
+            // Line range.
+            0x01,
+            // Opcode base.
+            0x03,
+            // Standard opcode lengths for opcodes 1 .. opcode base - 1.
+            0x01, 0x02,
+            // Include directories = '/', 'i', 'n', 'c', '\0', '/', 'i', 'n', 'c', '2', '\0', '\0'
+            0x2f, 0x69, 0x6e, 0x63, 0x00, 0x2f, 0x69, 0x6e, 0x63, 0x32, 0x00, 0x00,
+            // File names
+                // foo.rs
+                0x66, 0x6f, 0x6f, 0x2e, 0x72, 0x73, 0x00,
+                0x00,
+                0x00,
+                0x00,
+                // bar.h
+                0x62, 0x61, 0x72, 0x2e, 0x68, 0x00,
+                0x01,
+                0x00,
+                0x00,
+            // End file names.
+            0x00,
+
+            // Dummy line program data.
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+
+            // Dummy next line program.
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+        ];
+
+        let input = &mut EndianSlice::new(&buf, LittleEndian);
+
+        match LineProgramHeader::parse(input, DebugLineOffset(0), 4, None, None) {
+            Err(Error::UnexpectedEof(_)) => return,
+            otherwise => panic!("Unexpected result: {:?}", otherwise),
+        }
+    }
+
+    #[test]
+    fn test_parse_debug_line_unit_length_too_short() {
+        #[rustfmt::skip]
+        let buf = [
+            // 32-bit length = 40. TOO SHORT!!!
+            0x28, 0x00, 0x00, 0x00,
+            // Version.
+            0x04, 0x00,
+            // Header length = 40.
+            0x28, 0x00, 0x00, 0x00,
+            // Minimum instruction length.
+            0x01,
+            // Maximum operations per byte.
+            0x01,
+            // Default is_stmt.
+            0x01,
+            // Line base.
+            0x00,
+            // Line range.
+            0x01,
+            // Opcode base.
+            0x03,
+            // Standard opcode lengths for opcodes 1 .. opcode base - 1.
+            0x01, 0x02,
+            // Include directories = '/', 'i', 'n', 'c', '\0', '/', 'i', 'n', 'c', '2', '\0', '\0'
+            0x2f, 0x69, 0x6e, 0x63, 0x00, 0x2f, 0x69, 0x6e, 0x63, 0x32, 0x00, 0x00,
+            // File names
+                // foo.rs
+                0x66, 0x6f, 0x6f, 0x2e, 0x72, 0x73, 0x00,
+                0x00,
+                0x00,
+                0x00,
+                // bar.h
+                0x62, 0x61, 0x72, 0x2e, 0x68, 0x00,
+                0x01,
+                0x00,
+                0x00,
+            // End file names.
+            0x00,
+
+            // Dummy line program data.
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+
+            // Dummy next line program.
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00,
+        ];
+
+        let input = &mut EndianSlice::new(&buf, LittleEndian);
+
+        match LineProgramHeader::parse(input, DebugLineOffset(0), 4, None, None) {
+            Err(Error::UnexpectedEof(_)) => return,
+            otherwise => panic!("Unexpected result: {:?}", otherwise),
+        }
+    }
+
+    const OPCODE_BASE: u8 = 13;
+    const STANDARD_OPCODE_LENGTHS: &[u8] = &[0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1];
+
+    fn make_test_header(
+        buf: EndianSlice<LittleEndian>,
+    ) -> LineProgramHeader<EndianSlice<LittleEndian>> {
+        let encoding = Encoding {
+            format: Format::Dwarf32,
+            version: 4,
+            address_size: 8,
+        };
+        let line_encoding = LineEncoding {
+            line_base: -3,
+            line_range: 12,
+            ..Default::default()
+        };
+        LineProgramHeader {
+            encoding,
+            offset: DebugLineOffset(0),
+            unit_length: 1,
+            header_length: 1,
+            line_encoding,
+            opcode_base: OPCODE_BASE,
+            standard_opcode_lengths: EndianSlice::new(STANDARD_OPCODE_LENGTHS, LittleEndian),
+            file_names: vec![
+                FileEntry {
+                    path_name: AttributeValue::String(EndianSlice::new(b"foo.c", LittleEndian)),
+                    directory_index: 0,
+                    timestamp: 0,
+                    size: 0,
+                    md5: [0; 16],
+                },
+                FileEntry {
+                    path_name: AttributeValue::String(EndianSlice::new(b"bar.rs", LittleEndian)),
+                    directory_index: 0,
+                    timestamp: 0,
+                    size: 0,
+                    md5: [0; 16],
+                },
+            ],
+            include_directories: vec![],
+            directory_entry_format: vec![],
+            file_name_entry_format: vec![],
+            program_buf: buf,
+            comp_dir: None,
+            comp_file: None,
+        }
+    }
+
+    fn make_test_program(
+        buf: EndianSlice<LittleEndian>,
+    ) -> IncompleteLineProgram<EndianSlice<LittleEndian>> {
+        IncompleteLineProgram {
+            header: make_test_header(buf),
+        }
+    }
+
+    #[test]
+    fn test_parse_special_opcodes() {
+        for i in OPCODE_BASE..u8::MAX {
+            let input = [i, 0, 0, 0];
+            let input = EndianSlice::new(&input, LittleEndian);
+            let header = make_test_header(input);
+
+            let mut rest = input;
+            let opcode =
+                LineInstruction::parse(&header, &mut rest).expect("Should parse the opcode OK");
+
+            assert_eq!(*rest, *input.range_from(1..));
+            assert_eq!(opcode, LineInstruction::Special(i));
+        }
+    }
+
+    #[test]
+    fn test_parse_standard_opcodes() {
+        fn test<Operands>(
+            raw: constants::DwLns,
+            operands: Operands,
+            expected: LineInstruction<EndianSlice<LittleEndian>>,
+        ) where
+            Operands: AsRef<[u8]>,
+        {
+            let mut input = Vec::new();
+            input.push(raw.0);
+            input.extend_from_slice(operands.as_ref());
+
+            let expected_rest = [0, 1, 2, 3, 4];
+            input.extend_from_slice(&expected_rest);
+
+            let input = EndianSlice::new(&*input, LittleEndian);
+            let header = make_test_header(input);
+
+            let mut rest = input;
+            let opcode =
+                LineInstruction::parse(&header, &mut rest).expect("Should parse the opcode OK");
+
+            assert_eq!(opcode, expected);
+            assert_eq!(*rest, expected_rest);
+        }
+
+        test(constants::DW_LNS_copy, [], LineInstruction::Copy);
+        test(
+            constants::DW_LNS_advance_pc,
+            [42],
+            LineInstruction::AdvancePc(42),
+        );
+        test(
+            constants::DW_LNS_advance_line,
+            [9],
+            LineInstruction::AdvanceLine(9),
+        );
+        test(constants::DW_LNS_set_file, [7], LineInstruction::SetFile(7));
+        test(
+            constants::DW_LNS_set_column,
+            [1],
+            LineInstruction::SetColumn(1),
+        );
+        test(
+            constants::DW_LNS_negate_stmt,
+            [],
+            LineInstruction::NegateStatement,
+        );
+        test(
+            constants::DW_LNS_set_basic_block,
+            [],
+            LineInstruction::SetBasicBlock,
+        );
+        test(
+            constants::DW_LNS_const_add_pc,
+            [],
+            LineInstruction::ConstAddPc,
+        );
+        test(
+            constants::DW_LNS_fixed_advance_pc,
+            [42, 0],
+            LineInstruction::FixedAddPc(42),
+        );
+        test(
+            constants::DW_LNS_set_prologue_end,
+            [],
+            LineInstruction::SetPrologueEnd,
+        );
+        test(
+            constants::DW_LNS_set_isa,
+            [57 + 0x80, 100],
+            LineInstruction::SetIsa(12857),
+        );
+    }
+
+    #[test]
+    fn test_parse_unknown_standard_opcode_no_args() {
+        let input = [OPCODE_BASE, 1, 2, 3];
+        let input = EndianSlice::new(&input, LittleEndian);
+        let mut standard_opcode_lengths = Vec::new();
+        let mut header = make_test_header(input);
+        standard_opcode_lengths.extend(header.standard_opcode_lengths.slice());
+        standard_opcode_lengths.push(0);
+        header.opcode_base += 1;
+        header.standard_opcode_lengths = EndianSlice::new(&standard_opcode_lengths, LittleEndian);
+
+        let mut rest = input;
+        let opcode =
+            LineInstruction::parse(&header, &mut rest).expect("Should parse the opcode OK");
+
+        assert_eq!(
+            opcode,
+            LineInstruction::UnknownStandard0(constants::DwLns(OPCODE_BASE))
+        );
+        assert_eq!(*rest, *input.range_from(1..));
+    }
+
+    #[test]
+    fn test_parse_unknown_standard_opcode_one_arg() {
+        let input = [OPCODE_BASE, 1, 2, 3];
+        let input = EndianSlice::new(&input, LittleEndian);
+        let mut standard_opcode_lengths = Vec::new();
+        let mut header = make_test_header(input);
+        standard_opcode_lengths.extend(header.standard_opcode_lengths.slice());
+        standard_opcode_lengths.push(1);
+        header.opcode_base += 1;
+        header.standard_opcode_lengths = EndianSlice::new(&standard_opcode_lengths, LittleEndian);
+
+        let mut rest = input;
+        let opcode =
+            LineInstruction::parse(&header, &mut rest).expect("Should parse the opcode OK");
+
+        assert_eq!(
+            opcode,
+            LineInstruction::UnknownStandard1(constants::DwLns(OPCODE_BASE), 1)
+        );
+        assert_eq!(*rest, *input.range_from(2..));
+    }
+
+    #[test]
+    fn test_parse_unknown_standard_opcode_many_args() {
+        let input = [OPCODE_BASE, 1, 2, 3];
+        let input = EndianSlice::new(&input, LittleEndian);
+        let args = input.range_from(1..);
+        let mut standard_opcode_lengths = Vec::new();
+        let mut header = make_test_header(input);
+        standard_opcode_lengths.extend(header.standard_opcode_lengths.slice());
+        standard_opcode_lengths.push(3);
+        header.opcode_base += 1;
+        header.standard_opcode_lengths = EndianSlice::new(&standard_opcode_lengths, LittleEndian);
+
+        let mut rest = input;
+        let opcode =
+            LineInstruction::parse(&header, &mut rest).expect("Should parse the opcode OK");
+
+        assert_eq!(
+            opcode,
+            LineInstruction::UnknownStandardN(constants::DwLns(OPCODE_BASE), args)
+        );
+        assert_eq!(*rest, []);
+    }
+
+    #[test]
+    fn test_parse_extended_opcodes() {
+        fn test<Operands>(
+            raw: constants::DwLne,
+            operands: Operands,
+            expected: LineInstruction<EndianSlice<LittleEndian>>,
+        ) where
+            Operands: AsRef<[u8]>,
+        {
+            let mut input = Vec::new();
+            input.push(0);
+
+            let operands = operands.as_ref();
+            input.push(1 + operands.len() as u8);
+
+            input.push(raw.0);
+            input.extend_from_slice(operands);
+
+            let expected_rest = [0, 1, 2, 3, 4];
+            input.extend_from_slice(&expected_rest);
+
+            let input = EndianSlice::new(&input, LittleEndian);
+            let header = make_test_header(input);
+
+            let mut rest = input;
+            let opcode =
+                LineInstruction::parse(&header, &mut rest).expect("Should parse the opcode OK");
+
+            assert_eq!(opcode, expected);
+            assert_eq!(*rest, expected_rest);
+        }
+
+        test(
+            constants::DW_LNE_end_sequence,
+            [],
+            LineInstruction::EndSequence,
+        );
+        test(
+            constants::DW_LNE_set_address,
+            [1, 2, 3, 4, 5, 6, 7, 8],
+            LineInstruction::SetAddress(578_437_695_752_307_201),
+        );
+        test(
+            constants::DW_LNE_set_discriminator,
+            [42],
+            LineInstruction::SetDiscriminator(42),
+        );
+
+        let mut file = Vec::new();
+        // "foo.c"
+        let path_name = [b'f', b'o', b'o', b'.', b'c', 0];
+        file.extend_from_slice(&path_name);
+        // Directory index.
+        file.push(0);
+        // Last modification of file.
+        file.push(1);
+        // Size of file.
+        file.push(2);
+
+        test(
+            constants::DW_LNE_define_file,
+            file,
+            LineInstruction::DefineFile(FileEntry {
+                path_name: AttributeValue::String(EndianSlice::new(b"foo.c", LittleEndian)),
+                directory_index: 0,
+                timestamp: 1,
+                size: 2,
+                md5: [0; 16],
+            }),
+        );
+
+        // Unknown extended opcode.
+        let operands = [1, 2, 3, 4, 5, 6];
+        let opcode = constants::DwLne(99);
+        test(
+            opcode,
+            operands,
+            LineInstruction::UnknownExtended(opcode, EndianSlice::new(&operands, LittleEndian)),
+        );
+    }
+
+    #[test]
+    fn test_file_entry_directory() {
+        let path_name = [b'f', b'o', b'o', b'.', b'r', b's', 0];
+
+        let mut file = FileEntry {
+            path_name: AttributeValue::String(EndianSlice::new(&path_name, LittleEndian)),
+            directory_index: 1,
+            timestamp: 0,
+            size: 0,
+            md5: [0; 16],
+        };
+
+        let mut header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let dir = AttributeValue::String(EndianSlice::new(b"dir", LittleEndian));
+        header.include_directories.push(dir);
+
+        assert_eq!(file.directory(&header), Some(dir));
+
+        // Now test the compilation's current directory.
+        file.directory_index = 0;
+        assert_eq!(file.directory(&header), None);
+    }
+
+    fn assert_exec_opcode<'input>(
+        header: LineProgramHeader<EndianSlice<'input, LittleEndian>>,
+        mut registers: LineRow,
+        opcode: LineInstruction<EndianSlice<'input, LittleEndian>>,
+        expected_registers: LineRow,
+        expect_new_row: bool,
+    ) {
+        let mut program = IncompleteLineProgram { header };
+        let is_new_row = registers.execute(opcode, &mut program);
+
+        assert_eq!(is_new_row, expect_new_row);
+        assert_eq!(registers, expected_registers);
+    }
+
+    #[test]
+    fn test_exec_special_noop() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::Special(16);
+        let expected_registers = initial_registers;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, true);
+    }
+
+    #[test]
+    fn test_exec_special_negative_line_advance() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let mut initial_registers = LineRow::new(&header);
+        initial_registers.line.0 = 10;
+
+        let opcode = LineInstruction::Special(13);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.line.0 -= 3;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, true);
+    }
+
+    #[test]
+    fn test_exec_special_positive_line_advance() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let initial_registers = LineRow::new(&header);
+
+        let opcode = LineInstruction::Special(19);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.line.0 += 3;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, true);
+    }
+
+    #[test]
+    fn test_exec_special_positive_address_advance() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let initial_registers = LineRow::new(&header);
+
+        let opcode = LineInstruction::Special(52);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.address.0 += 3;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, true);
+    }
+
+    #[test]
+    fn test_exec_special_positive_address_and_line_advance() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let initial_registers = LineRow::new(&header);
+
+        let opcode = LineInstruction::Special(55);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.address.0 += 3;
+        expected_registers.line.0 += 3;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, true);
+    }
+
+    #[test]
+    fn test_exec_special_positive_address_and_negative_line_advance() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let mut initial_registers = LineRow::new(&header);
+        initial_registers.line.0 = 10;
+
+        let opcode = LineInstruction::Special(49);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.address.0 += 3;
+        expected_registers.line.0 -= 3;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, true);
+    }
+
+    #[test]
+    fn test_exec_special_line_underflow() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let mut initial_registers = LineRow::new(&header);
+        initial_registers.line.0 = 2;
+
+        // -3 line advance.
+        let opcode = LineInstruction::Special(13);
+
+        let mut expected_registers = initial_registers;
+        // Clamp at 0. No idea if this is the best way to handle this situation
+        // or not...
+        expected_registers.line.0 = 0;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, true);
+    }
+
+    #[test]
+    fn test_exec_copy() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let mut initial_registers = LineRow::new(&header);
+        initial_registers.address.0 = 1337;
+        initial_registers.line.0 = 42;
+
+        let opcode = LineInstruction::Copy;
+
+        let expected_registers = initial_registers;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, true);
+    }
+
+    #[test]
+    fn test_exec_advance_pc() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::AdvancePc(42);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.address.0 += 42;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_advance_pc_overflow() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let opcode = LineInstruction::AdvancePc(42);
+
+        let mut initial_registers = LineRow::new(&header);
+        initial_registers.address.0 = u64::MAX;
+
+        let mut expected_registers = initial_registers;
+        expected_registers.address.0 = 41;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_advance_line() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::AdvanceLine(42);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.line.0 += 42;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_advance_line_overflow() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let opcode = LineInstruction::AdvanceLine(42);
+
+        let mut initial_registers = LineRow::new(&header);
+        initial_registers.line.0 = u64::MAX;
+
+        let mut expected_registers = initial_registers;
+        expected_registers.line.0 = 41;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_set_file_in_bounds() {
+        for file_idx in 1..3 {
+            let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+            let initial_registers = LineRow::new(&header);
+            let opcode = LineInstruction::SetFile(file_idx);
+
+            let mut expected_registers = initial_registers;
+            expected_registers.file = file_idx;
+
+            assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+        }
+    }
+
+    #[test]
+    fn test_exec_set_file_out_of_bounds() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::SetFile(100);
+
+        // The spec doesn't say anything about rejecting input programs
+        // that set the file register out of bounds of the actual number
+        // of files that have been defined. Instead, we cross our
+        // fingers and hope that one gets defined before
+        // `LineRow::file` gets called and handle the error at
+        // that time if need be.
+        let mut expected_registers = initial_registers;
+        expected_registers.file = 100;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_file_entry_file_index_out_of_bounds() {
+        // These indices are 1-based, so 0 is invalid. 100 is way more than the
+        // number of files defined in the header.
+        let out_of_bounds_indices = [0, 100];
+
+        for file_idx in &out_of_bounds_indices[..] {
+            let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+            let mut row = LineRow::new(&header);
+
+            row.file = *file_idx;
+
+            assert_eq!(row.file(&header), None);
+        }
+    }
+
+    #[test]
+    fn test_file_entry_file_index_in_bounds() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let mut row = LineRow::new(&header);
+
+        row.file = 2;
+
+        assert_eq!(row.file(&header), Some(&header.file_names()[1]));
+    }
+
+    #[test]
+    fn test_exec_set_column() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::SetColumn(42);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.column = 42;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_negate_statement() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::NegateStatement;
+
+        let mut expected_registers = initial_registers;
+        expected_registers.is_stmt = !initial_registers.is_stmt;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_set_basic_block() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let mut initial_registers = LineRow::new(&header);
+        initial_registers.basic_block = false;
+
+        let opcode = LineInstruction::SetBasicBlock;
+
+        let mut expected_registers = initial_registers;
+        expected_registers.basic_block = true;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_const_add_pc() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::ConstAddPc;
+
+        let mut expected_registers = initial_registers;
+        expected_registers.address.0 += 20;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_fixed_add_pc() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let mut initial_registers = LineRow::new(&header);
+        initial_registers.op_index.0 = 1;
+
+        let opcode = LineInstruction::FixedAddPc(10);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.address.0 += 10;
+        expected_registers.op_index.0 = 0;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_set_prologue_end() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+
+        let mut initial_registers = LineRow::new(&header);
+        initial_registers.prologue_end = false;
+
+        let opcode = LineInstruction::SetPrologueEnd;
+
+        let mut expected_registers = initial_registers;
+        expected_registers.prologue_end = true;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_set_isa() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::SetIsa(1993);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.isa = 1993;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_unknown_standard_0() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::UnknownStandard0(constants::DwLns(111));
+        let expected_registers = initial_registers;
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_unknown_standard_1() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::UnknownStandard1(constants::DwLns(111), 2);
+        let expected_registers = initial_registers;
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_unknown_standard_n() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::UnknownStandardN(
+            constants::DwLns(111),
+            EndianSlice::new(&[2, 2, 2], LittleEndian),
+        );
+        let expected_registers = initial_registers;
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_end_sequence() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::EndSequence;
+
+        let mut expected_registers = initial_registers;
+        expected_registers.end_sequence = true;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, true);
+    }
+
+    #[test]
+    fn test_exec_set_address() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::SetAddress(3030);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.address.0 = 3030;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_set_address_tombstone() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::SetAddress(!0);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.tombstone = true;
+        expected_registers.address.0 = !0;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_define_file() {
+        let mut program = make_test_program(EndianSlice::new(&[], LittleEndian));
+        let mut row = LineRow::new(program.header());
+
+        let file = FileEntry {
+            path_name: AttributeValue::String(EndianSlice::new(b"test.cpp", LittleEndian)),
+            directory_index: 0,
+            timestamp: 0,
+            size: 0,
+            md5: [0; 16],
+        };
+
+        let opcode = LineInstruction::DefineFile(file);
+        let is_new_row = row.execute(opcode, &mut program);
+
+        assert_eq!(is_new_row, false);
+        assert_eq!(Some(&file), program.header().file_names.last());
+    }
+
+    #[test]
+    fn test_exec_set_discriminator() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::SetDiscriminator(9);
+
+        let mut expected_registers = initial_registers;
+        expected_registers.discriminator = 9;
+
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    #[test]
+    fn test_exec_unknown_extended() {
+        let header = make_test_header(EndianSlice::new(&[], LittleEndian));
+        let initial_registers = LineRow::new(&header);
+        let opcode = LineInstruction::UnknownExtended(
+            constants::DwLne(74),
+            EndianSlice::new(&[], LittleEndian),
+        );
+        let expected_registers = initial_registers;
+        assert_exec_opcode(header, initial_registers, opcode, expected_registers, false);
+    }
+
+    /// Ensure that `LineRows<R,P>` is covariant wrt R.
+    /// This only needs to compile.
+    #[allow(dead_code, unreachable_code, unused_variables)]
+    fn test_line_rows_variance<'a, 'b>(_: &'a [u8], _: &'b [u8])
+    where
+        'a: 'b,
+    {
+        let a: &OneShotLineRows<EndianSlice<'a, LittleEndian>> = unimplemented!();
+        let _: &OneShotLineRows<EndianSlice<'b, LittleEndian>> = a;
+    }
+
+    #[test]
+    fn test_parse_debug_line_v5_ok() {
+        let expected_lengths = &[1, 2];
+        let expected_program = &[0, 1, 2, 3, 4];
+        let expected_rest = &[5, 6, 7, 8, 9];
+        let expected_include_directories = [
+            AttributeValue::String(EndianSlice::new(b"dir1", LittleEndian)),
+            AttributeValue::String(EndianSlice::new(b"dir2", LittleEndian)),
+        ];
+        let expected_file_names = [
+            FileEntry {
+                path_name: AttributeValue::String(EndianSlice::new(b"file1", LittleEndian)),
+                directory_index: 0,
+                timestamp: 0,
+                size: 0,
+                md5: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16],
+            },
+            FileEntry {
+                path_name: AttributeValue::String(EndianSlice::new(b"file2", LittleEndian)),
+                directory_index: 1,
+                timestamp: 0,
+                size: 0,
+                md5: [
+                    11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
+                ],
+            },
+        ];
+
+        for format in vec![Format::Dwarf32, Format::Dwarf64] {
+            let length = Label::new();
+            let header_length = Label::new();
+            let start = Label::new();
+            let header_start = Label::new();
+            let end = Label::new();
+            let header_end = Label::new();
+            let section = Section::with_endian(Endian::Little)
+                .initial_length(format, &length, &start)
+                .D16(5)
+                // Address size.
+                .D8(4)
+                // Segment selector size.
+                .D8(0)
+                .word_label(format.word_size(), &header_length)
+                .mark(&header_start)
+                // Minimum instruction length.
+                .D8(1)
+                // Maximum operations per byte.
+                .D8(1)
+                // Default is_stmt.
+                .D8(1)
+                // Line base.
+                .D8(0)
+                // Line range.
+                .D8(1)
+                // Opcode base.
+                .D8(expected_lengths.len() as u8 + 1)
+                // Standard opcode lengths for opcodes 1 .. opcode base - 1.
+                .append_bytes(expected_lengths)
+                // Directory entry format count.
+                .D8(1)
+                .uleb(constants::DW_LNCT_path.0 as u64)
+                .uleb(constants::DW_FORM_string.0 as u64)
+                // Directory count.
+                .D8(2)
+                .append_bytes(b"dir1\0")
+                .append_bytes(b"dir2\0")
+                // File entry format count.
+                .D8(3)
+                .uleb(constants::DW_LNCT_path.0 as u64)
+                .uleb(constants::DW_FORM_string.0 as u64)
+                .uleb(constants::DW_LNCT_directory_index.0 as u64)
+                .uleb(constants::DW_FORM_data1.0 as u64)
+                .uleb(constants::DW_LNCT_MD5.0 as u64)
+                .uleb(constants::DW_FORM_data16.0 as u64)
+                // File count.
+                .D8(2)
+                .append_bytes(b"file1\0")
+                .D8(0)
+                .append_bytes(&expected_file_names[0].md5)
+                .append_bytes(b"file2\0")
+                .D8(1)
+                .append_bytes(&expected_file_names[1].md5)
+                .mark(&header_end)
+                // Dummy line program data.
+                .append_bytes(expected_program)
+                .mark(&end)
+                // Dummy trailing data.
+                .append_bytes(expected_rest);
+            length.set_const((&end - &start) as u64);
+            header_length.set_const((&header_end - &header_start) as u64);
+            let section = section.get_contents().unwrap();
+
+            let input = &mut EndianSlice::new(&section, LittleEndian);
+
+            let header = LineProgramHeader::parse(input, DebugLineOffset(0), 0, None, None)
+                .expect("should parse header ok");
+
+            assert_eq!(header.raw_program_buf().slice(), expected_program);
+            assert_eq!(input.slice(), expected_rest);
+
+            assert_eq!(header.offset, DebugLineOffset(0));
+            assert_eq!(header.version(), 5);
+            assert_eq!(header.address_size(), 4);
+            assert_eq!(header.minimum_instruction_length(), 1);
+            assert_eq!(header.maximum_operations_per_instruction(), 1);
+            assert_eq!(header.default_is_stmt(), true);
+            assert_eq!(header.line_base(), 0);
+            assert_eq!(header.line_range(), 1);
+            assert_eq!(header.opcode_base(), expected_lengths.len() as u8 + 1);
+            assert_eq!(header.standard_opcode_lengths().slice(), expected_lengths);
+            assert_eq!(
+                header.directory_entry_format(),
+                &[FileEntryFormat {
+                    content_type: constants::DW_LNCT_path,
+                    form: constants::DW_FORM_string,
+                }]
+            );
+            assert_eq!(header.include_directories(), expected_include_directories);
+            assert_eq!(header.directory(0), Some(expected_include_directories[0]));
+            assert_eq!(
+                header.file_name_entry_format(),
+                &[
+                    FileEntryFormat {
+                        content_type: constants::DW_LNCT_path,
+                        form: constants::DW_FORM_string,
+                    },
+                    FileEntryFormat {
+                        content_type: constants::DW_LNCT_directory_index,
+                        form: constants::DW_FORM_data1,
+                    },
+                    FileEntryFormat {
+                        content_type: constants::DW_LNCT_MD5,
+                        form: constants::DW_FORM_data16,
+                    }
+                ]
+            );
+            assert_eq!(header.file_names(), expected_file_names);
+            assert_eq!(header.file(0), Some(&expected_file_names[0]));
+        }
+    }
+
+    #[test]
+    fn test_sequences() {
+        #[rustfmt::skip]
+        let buf = [
+            // 32-bit length
+            94, 0x00, 0x00, 0x00,
+            // Version.
+            0x04, 0x00,
+            // Header length = 40.
+            0x28, 0x00, 0x00, 0x00,
+            // Minimum instruction length.
+            0x01,
+            // Maximum operations per byte.
+            0x01,
+            // Default is_stmt.
+            0x01,
+            // Line base.
+            0x00,
+            // Line range.
+            0x01,
+            // Opcode base.
+            0x03,
+            // Standard opcode lengths for opcodes 1 .. opcode base - 1.
+            0x01, 0x02,
+            // Include directories = '/', 'i', 'n', 'c', '\0', '/', 'i', 'n', 'c', '2', '\0', '\0'
+            0x2f, 0x69, 0x6e, 0x63, 0x00, 0x2f, 0x69, 0x6e, 0x63, 0x32, 0x00, 0x00,
+            // File names
+                // foo.rs
+                0x66, 0x6f, 0x6f, 0x2e, 0x72, 0x73, 0x00,
+                0x00,
+                0x00,
+                0x00,
+                // bar.h
+                0x62, 0x61, 0x72, 0x2e, 0x68, 0x00,
+                0x01,
+                0x00,
+                0x00,
+            // End file names.
+            0x00,
+
+            0, 5, constants::DW_LNE_set_address.0, 1, 0, 0, 0,
+            constants::DW_LNS_copy.0,
+            constants::DW_LNS_advance_pc.0, 1,
+            constants::DW_LNS_copy.0,
+            constants::DW_LNS_advance_pc.0, 2,
+            0, 1, constants::DW_LNE_end_sequence.0,
+
+            // Tombstone
+            0, 5, constants::DW_LNE_set_address.0, 0xff, 0xff, 0xff, 0xff,
+            constants::DW_LNS_copy.0,
+            constants::DW_LNS_advance_pc.0, 1,
+            constants::DW_LNS_copy.0,
+            constants::DW_LNS_advance_pc.0, 2,
+            0, 1, constants::DW_LNE_end_sequence.0,
+
+            0, 5, constants::DW_LNE_set_address.0, 11, 0, 0, 0,
+            constants::DW_LNS_copy.0,
+            constants::DW_LNS_advance_pc.0, 1,
+            constants::DW_LNS_copy.0,
+            constants::DW_LNS_advance_pc.0, 2,
+            0, 1, constants::DW_LNE_end_sequence.0,
+        ];
+        assert_eq!(buf[0] as usize, buf.len() - 4);
+
+        let rest = &mut EndianSlice::new(&buf, LittleEndian);
+
+        let header = LineProgramHeader::parse(rest, DebugLineOffset(0), 4, None, None)
+            .expect("should parse header ok");
+        let program = IncompleteLineProgram { header };
+
+        let sequences = program.sequences().unwrap().1;
+        assert_eq!(sequences.len(), 2);
+        assert_eq!(sequences[0].start, 1);
+        assert_eq!(sequences[0].end, 4);
+        assert_eq!(sequences[1].start, 11);
+        assert_eq!(sequences[1].end, 14);
+    }
+}