Struct gimli::read::LineProgramHeader

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,
    opcode_base: u8,
    standard_opcode_lengths: R,
    directory_entry_format: Vec<FileEntryFormat>,
    include_directories: Vec<AttributeValue<R, Offset>>,
    file_name_entry_format: Vec<FileEntryFormat>,
    file_names: Vec<FileEntry<R, Offset>>,
    program_buf: R,
    comp_dir: Option<R>,
    comp_file: Option<FileEntry<R, Offset>>,
}

A header for a line number program in the .debug_line section, as defined in section 6.2.4 of the standard.

Fields

encoding: Encoding

offset: DebugLineOffset<Offset>

unit_length: Offset

header_length: Offset

line_encoding: LineEncoding

opcode_base: u8

“The number assigned to the first special opcode.”

standard_opcode_lengths: R

“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.”

directory_entry_format: Vec<FileEntryFormat>

“A sequence of directory entry format descriptions.”

include_directories: Vec<AttributeValue<R, Offset>>

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.

file_name_entry_format: Vec<FileEntryFormat>

“A sequence of file entry format descriptions.”

file_names: Vec<FileEntry<R, Offset>>

“Entries in this sequence describe source files that contribute to the line number information for this compilation unit or is used in other contexts.”

program_buf: R

The encoded line program instructions.

comp_dir: Option<R>

The current directory of the compilation.

comp_file: Option<FileEntry<R, Offset>>

The primary source file.

Implementations

impl<R, Offset> LineProgramHeader<R, Offset>

where R: Reader<Offset = Offset>, Offset: ReaderOffset,

pub fn offset(&self) -> DebugLineOffset<R::Offset>

Return the offset of the line number program header in the .debug_line section.

pub fn unit_length(&self) -> R::Offset

Return the length of the line number program and header, not including the length of the encoded length itself.

pub fn encoding(&self) -> Encoding

Return the encoding parameters for this header’s line program.

pub fn version(&self) -> u16

Get the version of this header’s line program.

pub fn header_length(&self) -> R::Offset

Get the length of the encoded line number program header, not including the length of the encoded length itself.

pub fn address_size(&self) -> u8

Get the size in bytes of a target machine address.

pub fn format(&self) -> Format

Whether this line program is encoded in 64- or 32-bit DWARF.

pub fn line_encoding(&self) -> LineEncoding

Get the line encoding parameters for this header’s line program.

pub fn minimum_instruction_length(&self) -> u8

Get the minimum instruction length any instruction in this header’s line program may have.

pub fn maximum_operations_per_instruction(&self) -> u8

Get the maximum number of operations each instruction in this header’s line program may have.

pub fn default_is_stmt(&self) -> bool

Get the default value of the is_stmt register for this header’s line program.

pub fn line_base(&self) -> i8

Get the line base for this header’s line program.

pub fn line_range(&self) -> u8

Get the line range for this header’s line program.

pub fn opcode_base(&self) -> u8

Get opcode base for this header’s line program.

pub fn standard_opcode_lengths(&self) -> &R

An array of u8 that specifies the number of LEB128 operands for each of the standard opcodes.

pub fn directory_entry_format(&self) -> &[FileEntryFormat]

Get the format of a directory entry.

pub fn include_directories(&self) -> &[AttributeValue<R, Offset>]

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 directory(&self, directory: u64) -> Option<AttributeValue<R, Offset>>

The include directory with the given directory index.

A directory index of 0 corresponds to the compilation unit directory.

pub fn file_name_entry_format(&self) -> &[FileEntryFormat]

Get the format of a file name entry.

pub fn file_has_timestamp(&self) -> bool

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_size(&self) -> bool

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_md5(&self) -> bool

Return true if the file name entry format contains an MD5 field.

pub fn file_has_source(&self) -> bool

Return true if the file name entry format contains a source field.

pub fn file_names(&self) -> &[FileEntry<R, Offset>]

Get the list of source files that appear in this header’s line program.

pub fn file(&self, file: u64) -> Option<&FileEntry<R, Offset>>

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 raw_program_buf(&self) -> R

Get the raw, un-parsed EndianSlice containing this header’s line number program.

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...
}

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 instructions(&self) -> LineInstructions<R>

Iterate over the instructions in this header’s line number program, parsing them as we go.

fn parse( input: &mut R, offset: DebugLineOffset<Offset>, address_size: u8, comp_dir: Option<R>, comp_name: Option<R>, ) -> Result<LineProgramHeader<R, Offset>>

Trait Implementations

impl<R, Offset> Clone for LineProgramHeader<R, Offset>

where R: Reader<Offset = Offset> + Clone, Offset: ReaderOffset + Clone,

fn clone(&self) -> LineProgramHeader<R, Offset>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<R, Offset> Debug for LineProgramHeader<R, Offset>

where R: Reader<Offset = Offset> + Debug, Offset: ReaderOffset + Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<R, Offset> PartialEq for LineProgramHeader<R, Offset>

where R: Reader<Offset = Offset> + PartialEq, Offset: ReaderOffset + PartialEq,

fn eq(&self, other: &LineProgramHeader<R, Offset>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<R, Offset> Eq for LineProgramHeader<R, Offset>

where R: Reader<Offset = Offset> + Eq, Offset: ReaderOffset + Eq,

impl<R, Offset> StructuralPartialEq for LineProgramHeader<R, Offset>

where R: Reader<Offset = Offset>, Offset: ReaderOffset,