use crate::common::{
DebugAddrBase, DebugAddrIndex, DebugRngListsBase, DebugRngListsIndex, DwarfFileType, Encoding,
RangeListsOffset, SectionId,
};
use crate::constants;
use crate::endianity::Endianity;
use crate::read::{
lists::ListsHeader, DebugAddr, EndianSlice, Error, Reader, ReaderAddress, ReaderOffset,
ReaderOffsetId, Result, Section,
};
#[derive(Debug, Default, Clone, Copy)]
pub struct DebugRanges<R> {
pub(crate) section: R,
}
impl<'input, Endian> DebugRanges<EndianSlice<'input, Endian>>
where
Endian: Endianity,
{
pub fn new(section: &'input [u8], endian: Endian) -> Self {
Self::from(EndianSlice::new(section, endian))
}
}
impl<T> DebugRanges<T> {
pub(crate) fn borrow<'a, F, R>(&'a self, mut borrow: F) -> DebugRanges<R>
where
F: FnMut(&'a T) -> R,
{
borrow(&self.section).into()
}
}
impl<R> Section<R> for DebugRanges<R> {
fn id() -> SectionId {
SectionId::DebugRanges
}
fn reader(&self) -> &R {
&self.section
}
}
impl<R> From<R> for DebugRanges<R> {
fn from(section: R) -> Self {
DebugRanges { section }
}
}
#[derive(Debug, Default, Clone, Copy)]
pub struct DebugRngLists<R> {
section: R,
}
impl<'input, Endian> DebugRngLists<EndianSlice<'input, Endian>>
where
Endian: Endianity,
{
pub fn new(section: &'input [u8], endian: Endian) -> Self {
Self::from(EndianSlice::new(section, endian))
}
}
impl<T> DebugRngLists<T> {
pub(crate) fn borrow<'a, F, R>(&'a self, mut borrow: F) -> DebugRngLists<R>
where
F: FnMut(&'a T) -> R,
{
borrow(&self.section).into()
}
}
impl<R> Section<R> for DebugRngLists<R> {
fn id() -> SectionId {
SectionId::DebugRngLists
}
fn reader(&self) -> &R {
&self.section
}
}
impl<R> From<R> for DebugRngLists<R> {
fn from(section: R) -> Self {
DebugRngLists { section }
}
}
#[allow(unused)]
pub(crate) type RngListsHeader = ListsHeader;
impl<Offset> DebugRngListsBase<Offset>
where
Offset: ReaderOffset,
{
pub fn default_for_encoding_and_file(
encoding: Encoding,
file_type: DwarfFileType,
) -> DebugRngListsBase<Offset> {
if encoding.version >= 5 && file_type == DwarfFileType::Dwo {
DebugRngListsBase(Offset::from_u8(RngListsHeader::size_for_encoding(encoding)))
} else {
DebugRngListsBase(Offset::from_u8(0))
}
}
}
#[derive(Debug, Default, Clone, Copy)]
pub struct RangeLists<R> {
debug_ranges: DebugRanges<R>,
debug_rnglists: DebugRngLists<R>,
}
impl<R> RangeLists<R> {
pub fn new(debug_ranges: DebugRanges<R>, debug_rnglists: DebugRngLists<R>) -> RangeLists<R> {
RangeLists {
debug_ranges,
debug_rnglists,
}
}
pub fn debug_ranges(&self) -> &DebugRanges<R> {
&self.debug_ranges
}
pub fn set_debug_ranges(&mut self, debug_ranges: DebugRanges<R>) {
self.debug_ranges = debug_ranges;
}
pub fn debug_rnglists(&self) -> &DebugRngLists<R> {
&self.debug_rnglists
}
}
impl<T> RangeLists<T> {
pub fn borrow<'a, F, R>(&'a self, mut borrow: F) -> RangeLists<R>
where
F: FnMut(&'a T) -> R,
{
RangeLists {
debug_ranges: borrow(&self.debug_ranges.section).into(),
debug_rnglists: borrow(&self.debug_rnglists.section).into(),
}
}
}
impl<R: Reader> RangeLists<R> {
pub fn ranges(
&self,
offset: RangeListsOffset<R::Offset>,
unit_encoding: Encoding,
base_address: u64,
debug_addr: &DebugAddr<R>,
debug_addr_base: DebugAddrBase<R::Offset>,
) -> Result<RngListIter<R>> {
Ok(RngListIter::new(
self.raw_ranges(offset, unit_encoding)?,
base_address,
debug_addr.clone(),
debug_addr_base,
))
}
pub fn raw_ranges(
&self,
offset: RangeListsOffset<R::Offset>,
unit_encoding: Encoding,
) -> Result<RawRngListIter<R>> {
let (mut input, format) = if unit_encoding.version <= 4 {
(self.debug_ranges.section.clone(), RangeListsFormat::Bare)
} else {
(self.debug_rnglists.section.clone(), RangeListsFormat::Rle)
};
input.skip(offset.0)?;
Ok(RawRngListIter::new(input, unit_encoding, format))
}
pub fn get_offset(
&self,
unit_encoding: Encoding,
base: DebugRngListsBase<R::Offset>,
index: DebugRngListsIndex<R::Offset>,
) -> Result<RangeListsOffset<R::Offset>> {
let format = unit_encoding.format;
let input = &mut self.debug_rnglists.section.clone();
input.skip(base.0)?;
input.skip(R::Offset::from_u64(
index.0.into_u64() * u64::from(format.word_size()),
)?)?;
input
.read_offset(format)
.map(|x| RangeListsOffset(base.0 + x))
}
pub fn lookup_offset_id(&self, id: ReaderOffsetId) -> Option<(SectionId, R::Offset)> {
self.debug_ranges
.lookup_offset_id(id)
.or_else(|| self.debug_rnglists.lookup_offset_id(id))
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
enum RangeListsFormat {
Bare,
Rle,
}
#[derive(Debug)]
pub struct RawRngListIter<R: Reader> {
input: R,
encoding: Encoding,
format: RangeListsFormat,
}
#[derive(Clone, Debug)]
pub enum RawRngListEntry<T> {
AddressOrOffsetPair {
begin: u64,
end: u64,
},
BaseAddress {
addr: u64,
},
BaseAddressx {
addr: DebugAddrIndex<T>,
},
StartxEndx {
begin: DebugAddrIndex<T>,
end: DebugAddrIndex<T>,
},
StartxLength {
begin: DebugAddrIndex<T>,
length: u64,
},
OffsetPair {
begin: u64,
end: u64,
},
StartEnd {
begin: u64,
end: u64,
},
StartLength {
begin: u64,
length: u64,
},
}
impl<T: ReaderOffset> RawRngListEntry<T> {
fn parse<R: Reader<Offset = T>>(
input: &mut R,
encoding: Encoding,
format: RangeListsFormat,
) -> Result<Option<Self>> {
Ok(match format {
RangeListsFormat::Bare => {
let range = RawRange::parse(input, encoding.address_size)?;
if range.is_end() {
None
} else if range.is_base_address(encoding.address_size) {
Some(RawRngListEntry::BaseAddress { addr: range.end })
} else {
Some(RawRngListEntry::AddressOrOffsetPair {
begin: range.begin,
end: range.end,
})
}
}
RangeListsFormat::Rle => match constants::DwRle(input.read_u8()?) {
constants::DW_RLE_end_of_list => None,
constants::DW_RLE_base_addressx => Some(RawRngListEntry::BaseAddressx {
addr: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
}),
constants::DW_RLE_startx_endx => Some(RawRngListEntry::StartxEndx {
begin: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
end: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
}),
constants::DW_RLE_startx_length => Some(RawRngListEntry::StartxLength {
begin: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
length: input.read_uleb128()?,
}),
constants::DW_RLE_offset_pair => Some(RawRngListEntry::OffsetPair {
begin: input.read_uleb128()?,
end: input.read_uleb128()?,
}),
constants::DW_RLE_base_address => Some(RawRngListEntry::BaseAddress {
addr: input.read_address(encoding.address_size)?,
}),
constants::DW_RLE_start_end => Some(RawRngListEntry::StartEnd {
begin: input.read_address(encoding.address_size)?,
end: input.read_address(encoding.address_size)?,
}),
constants::DW_RLE_start_length => Some(RawRngListEntry::StartLength {
begin: input.read_address(encoding.address_size)?,
length: input.read_uleb128()?,
}),
entry => {
return Err(Error::UnknownRangeListsEntry(entry));
}
},
})
}
}
impl<R: Reader> RawRngListIter<R> {
fn new(input: R, encoding: Encoding, format: RangeListsFormat) -> RawRngListIter<R> {
RawRngListIter {
input,
encoding,
format,
}
}
pub fn next(&mut self) -> Result<Option<RawRngListEntry<R::Offset>>> {
if self.input.is_empty() {
return Ok(None);
}
match RawRngListEntry::parse(&mut self.input, self.encoding, self.format) {
Ok(range) => {
if range.is_none() {
self.input.empty();
}
Ok(range)
}
Err(e) => {
self.input.empty();
Err(e)
}
}
}
}
#[cfg(feature = "fallible-iterator")]
impl<R: Reader> fallible_iterator::FallibleIterator for RawRngListIter<R> {
type Item = RawRngListEntry<R::Offset>;
type Error = Error;
fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> {
RawRngListIter::next(self)
}
}
#[derive(Debug)]
pub struct RngListIter<R: Reader> {
raw: RawRngListIter<R>,
base_address: u64,
debug_addr: DebugAddr<R>,
debug_addr_base: DebugAddrBase<R::Offset>,
}
impl<R: Reader> RngListIter<R> {
fn new(
raw: RawRngListIter<R>,
base_address: u64,
debug_addr: DebugAddr<R>,
debug_addr_base: DebugAddrBase<R::Offset>,
) -> RngListIter<R> {
RngListIter {
raw,
base_address,
debug_addr,
debug_addr_base,
}
}
#[inline]
fn get_address(&self, index: DebugAddrIndex<R::Offset>) -> Result<u64> {
self.debug_addr
.get_address(self.raw.encoding.address_size, self.debug_addr_base, index)
}
pub fn next(&mut self) -> Result<Option<Range>> {
loop {
let raw_range = match self.raw.next()? {
Some(range) => range,
None => return Ok(None),
};
let range = self.convert_raw(raw_range)?;
if range.is_some() {
return Ok(range);
}
}
}
#[doc(hidden)]
pub fn next_raw(&mut self) -> Result<Option<RawRngListEntry<R::Offset>>> {
self.raw.next()
}
#[doc(hidden)]
pub fn convert_raw(&mut self, raw_range: RawRngListEntry<R::Offset>) -> Result<Option<Range>> {
let address_size = self.raw.encoding.address_size;
let mask = u64::ones_sized(address_size);
let tombstone = if self.raw.encoding.version <= 4 {
mask - 1
} else {
mask
};
let range = match raw_range {
RawRngListEntry::BaseAddress { addr } => {
self.base_address = addr;
return Ok(None);
}
RawRngListEntry::BaseAddressx { addr } => {
self.base_address = self.get_address(addr)?;
return Ok(None);
}
RawRngListEntry::StartxEndx { begin, end } => {
let begin = self.get_address(begin)?;
let end = self.get_address(end)?;
Range { begin, end }
}
RawRngListEntry::StartxLength { begin, length } => {
let begin = self.get_address(begin)?;
let end = begin.wrapping_add_sized(length, address_size);
Range { begin, end }
}
RawRngListEntry::AddressOrOffsetPair { begin, end }
| RawRngListEntry::OffsetPair { begin, end } => {
if self.base_address == tombstone {
return Ok(None);
}
let mut range = Range { begin, end };
range.add_base_address(self.base_address, self.raw.encoding.address_size);
range
}
RawRngListEntry::StartEnd { begin, end } => Range { begin, end },
RawRngListEntry::StartLength { begin, length } => {
let end = begin.wrapping_add_sized(length, address_size);
Range { begin, end }
}
};
if range.begin == tombstone || range.begin >= range.end {
return Ok(None);
}
Ok(Some(range))
}
}
#[cfg(feature = "fallible-iterator")]
impl<R: Reader> fallible_iterator::FallibleIterator for RngListIter<R> {
type Item = Range;
type Error = Error;
fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> {
RngListIter::next(self)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub(crate) struct RawRange {
pub begin: u64,
pub end: u64,
}
impl RawRange {
#[inline]
pub fn is_end(&self) -> bool {
self.begin == 0 && self.end == 0
}
#[inline]
pub fn is_base_address(&self, address_size: u8) -> bool {
self.begin == !0 >> (64 - address_size * 8)
}
#[inline]
pub fn parse<R: Reader>(input: &mut R, address_size: u8) -> Result<RawRange> {
let begin = input.read_address(address_size)?;
let end = input.read_address(address_size)?;
let range = RawRange { begin, end };
Ok(range)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Range {
pub begin: u64,
pub end: u64,
}
impl Range {
#[inline]
pub(crate) fn add_base_address(&mut self, base_address: u64, address_size: u8) {
self.begin = base_address.wrapping_add_sized(self.begin, address_size);
self.end = base_address.wrapping_add_sized(self.end, address_size);
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::common::Format;
use crate::constants::*;
use crate::endianity::LittleEndian;
use crate::test_util::GimliSectionMethods;
use alloc::vec::Vec;
use test_assembler::{Endian, Label, LabelMaker, Section};
#[test]
fn test_rnglists() {
let format = Format::Dwarf32;
for size in [4, 8] {
let tombstone = u64::ones_sized(size);
let tombstone_0 = 0;
let encoding = Encoding {
format,
version: 5,
address_size: size,
};
let section = Section::with_endian(Endian::Little)
.word(size, 0x0300_0000)
.word(size, 0x0301_0300)
.word(size, 0x0301_0400)
.word(size, 0x0301_0500)
.word(size, tombstone)
.word(size, 0x0301_0600)
.word(size, tombstone_0);
let buf = section.get_contents().unwrap();
let debug_addr = &DebugAddr::from(EndianSlice::new(&buf, LittleEndian));
let debug_addr_base = DebugAddrBase(0);
let length = Label::new();
let start = Label::new();
let first = Label::new();
let end = Label::new();
let mut section = Section::with_endian(Endian::Little)
.initial_length(format, &length, &start)
.L16(encoding.version)
.L8(encoding.address_size)
.L8(0)
.L32(0)
.mark(&first);
let mut expected_ranges = Vec::new();
let mut expect_range = |begin, end| {
expected_ranges.push(Range { begin, end });
};
section = section.L8(DW_RLE_offset_pair.0).uleb(0x10200).uleb(0x10300);
expect_range(0x0101_0200, 0x0101_0300);
section = section.L8(DW_RLE_base_address.0).word(size, 0x0200_0000);
section = section.L8(DW_RLE_offset_pair.0).uleb(0x10400).uleb(0x10500);
expect_range(0x0201_0400, 0x0201_0500);
section = section
.L8(DW_RLE_start_end.0)
.word(size, 0x201_0a00)
.word(size, 0x201_0b00);
expect_range(0x0201_0a00, 0x0201_0b00);
section = section
.L8(DW_RLE_start_length.0)
.word(size, 0x201_0c00)
.uleb(0x100);
expect_range(0x0201_0c00, 0x0201_0d00);
section = section.L8(DW_RLE_base_address.0).word(size, 0);
section = section.L8(DW_RLE_offset_pair.0).uleb(0).uleb(1);
expect_range(0, 1);
section = section.L8(DW_RLE_base_address.0).word(size, 0);
section = section.L8(DW_RLE_offset_pair.0).uleb(0).uleb(tombstone);
expect_range(0, tombstone);
section = section.L8(DW_RLE_base_addressx.0).uleb(0);
section = section.L8(DW_RLE_offset_pair.0).uleb(0x10100).uleb(0x10200);
expect_range(0x0301_0100, 0x0301_0200);
section = section.L8(DW_RLE_startx_endx.0).uleb(1).uleb(2);
expect_range(0x0301_0300, 0x0301_0400);
section = section.L8(DW_RLE_startx_length.0).uleb(3).uleb(0x100);
expect_range(0x0301_0500, 0x0301_0600);
section = section.L8(DW_RLE_base_addressx.0).uleb(4);
section = section.L8(DW_RLE_offset_pair.0).uleb(0x11100).uleb(0x11200);
section = section.L8(DW_RLE_base_address.0).word(size, tombstone);
section = section.L8(DW_RLE_offset_pair.0).uleb(0x11300).uleb(0x11400);
section = section.L8(DW_RLE_startx_endx.0).uleb(4).uleb(5);
section = section.L8(DW_RLE_startx_length.0).uleb(4).uleb(0x100);
section = section
.L8(DW_RLE_start_end.0)
.word(size, tombstone)
.word(size, 0x201_1500);
section = section
.L8(DW_RLE_start_length.0)
.word(size, tombstone)
.uleb(0x100);
section = section.L8(DW_RLE_startx_endx.0).uleb(6).uleb(6);
section = section
.L8(DW_RLE_start_end.0)
.word(size, tombstone_0)
.word(size, tombstone_0);
section = section.L8(DW_RLE_base_address.0).word(size, 0);
section = section.L8(DW_RLE_offset_pair.0).uleb(0).uleb(0);
section = section.L8(DW_RLE_base_address.0).word(size, 0x10000);
section = section.L8(DW_RLE_offset_pair.0).uleb(0x1234).uleb(0x1234);
section = section
.L8(DW_RLE_start_end.0)
.word(size, 0x201_1600)
.word(size, 0x201_1700);
expect_range(0x0201_1600, 0x0201_1700);
section = section.L8(DW_RLE_end_of_list.0);
section = section.mark(&end);
section = section.word(size, 0x1234_5678);
length.set_const((&end - &start) as u64);
let offset = RangeListsOffset((&first - §ion.start()) as usize);
let buf = section.get_contents().unwrap();
let debug_ranges = DebugRanges::new(&[], LittleEndian);
let debug_rnglists = DebugRngLists::new(&buf, LittleEndian);
let rnglists = RangeLists::new(debug_ranges, debug_rnglists);
let mut ranges = rnglists
.ranges(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
.unwrap();
for expected_range in expected_ranges {
let range = ranges.next();
assert_eq!(
range,
Ok(Some(expected_range)),
"read {:x?}, expect {:x?}",
range,
expected_range
);
}
assert_eq!(ranges.next(), Ok(None));
let mut ranges = rnglists
.ranges(
RangeListsOffset(buf.len()),
encoding,
0x0100_0000,
debug_addr,
debug_addr_base,
)
.unwrap();
assert_eq!(ranges.next(), Ok(None));
}
}
#[test]
fn test_raw_range() {
let range = RawRange {
begin: 0,
end: 0xffff_ffff,
};
assert!(!range.is_end());
assert!(!range.is_base_address(4));
assert!(!range.is_base_address(8));
let range = RawRange { begin: 0, end: 0 };
assert!(range.is_end());
assert!(!range.is_base_address(4));
assert!(!range.is_base_address(8));
let range = RawRange {
begin: 0xffff_ffff,
end: 0,
};
assert!(!range.is_end());
assert!(range.is_base_address(4));
assert!(!range.is_base_address(8));
let range = RawRange {
begin: 0xffff_ffff_ffff_ffff,
end: 0,
};
assert!(!range.is_end());
assert!(!range.is_base_address(4));
assert!(range.is_base_address(8));
}
#[test]
fn test_ranges() {
for size in [4, 8] {
let base = u64::ones_sized(size);
let tombstone = u64::ones_sized(size) - 1;
let start = Label::new();
let first = Label::new();
let mut section = Section::with_endian(Endian::Little)
.mark(&start)
.word(size, 0x10000)
.word(size, 0x10100)
.mark(&first);
let mut expected_ranges = Vec::new();
let mut expect_range = |begin, end| {
expected_ranges.push(Range { begin, end });
};
section = section.word(size, 0x10200).word(size, 0x10300);
expect_range(0x0101_0200, 0x0101_0300);
section = section.word(size, base).word(size, 0x0200_0000);
section = section.word(size, 0x10400).word(size, 0x10500);
expect_range(0x0201_0400, 0x0201_0500);
section = section.word(size, 0x10600).word(size, 0x10600);
section = section.word(size, 0x10800).word(size, 0x10900);
expect_range(0x0201_0800, 0x0201_0900);
section = section.word(size, base).word(size, 0);
section = section.word(size, 0).word(size, 1);
expect_range(0, 1);
section = section.word(size, base).word(size, 0);
section = section.word(size, 0).word(size, base);
expect_range(0, base);
section = section.word(size, tombstone).word(size, tombstone);
section = section.word(size, base).word(size, tombstone);
section = section.word(size, 0x10a00).word(size, 0x10b00);
section = section.word(size, 0).word(size, 0);
section = section.word(size, 0x1234_5678);
let buf = section.get_contents().unwrap();
let debug_ranges = DebugRanges::new(&buf, LittleEndian);
let debug_rnglists = DebugRngLists::new(&[], LittleEndian);
let rnglists = RangeLists::new(debug_ranges, debug_rnglists);
let offset = RangeListsOffset((&first - &start) as usize);
let debug_addr = &DebugAddr::from(EndianSlice::new(&[], LittleEndian));
let debug_addr_base = DebugAddrBase(0);
let encoding = Encoding {
format: Format::Dwarf32,
version: 4,
address_size: size,
};
let mut ranges = rnglists
.ranges(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
.unwrap();
for expected_range in expected_ranges {
let range = ranges.next();
assert_eq!(
range,
Ok(Some(expected_range)),
"read {:x?}, expect {:x?}",
range,
expected_range
);
}
assert_eq!(ranges.next(), Ok(None));
let mut ranges = rnglists
.ranges(
RangeListsOffset(buf.len()),
encoding,
0x0100_0000,
debug_addr,
debug_addr_base,
)
.unwrap();
assert_eq!(ranges.next(), Ok(None));
}
}
#[test]
fn test_ranges_invalid() {
#[rustfmt::skip]
let section = Section::with_endian(Endian::Little)
.L32(0x20000).L32(0x10000)
.L32(0x20000).L32(0xff01_0000);
let buf = section.get_contents().unwrap();
let debug_ranges = DebugRanges::new(&buf, LittleEndian);
let debug_rnglists = DebugRngLists::new(&[], LittleEndian);
let rnglists = RangeLists::new(debug_ranges, debug_rnglists);
let debug_addr = &DebugAddr::from(EndianSlice::new(&[], LittleEndian));
let debug_addr_base = DebugAddrBase(0);
let encoding = Encoding {
format: Format::Dwarf32,
version: 4,
address_size: 4,
};
let mut ranges = rnglists
.ranges(
RangeListsOffset(0x0),
encoding,
0x0100_0000,
debug_addr,
debug_addr_base,
)
.unwrap();
assert_eq!(ranges.next(), Ok(None));
let mut ranges = rnglists
.ranges(
RangeListsOffset(0x8),
encoding,
0x0100_0000,
debug_addr,
debug_addr_base,
)
.unwrap();
assert_eq!(ranges.next(), Ok(None));
match rnglists.ranges(
RangeListsOffset(buf.len() + 1),
encoding,
0x0100_0000,
debug_addr,
debug_addr_base,
) {
Err(Error::UnexpectedEof(_)) => {}
otherwise => panic!("Unexpected result: {:?}", otherwise),
}
}
#[test]
fn test_get_offset() {
for format in [Format::Dwarf32, Format::Dwarf64] {
let encoding = Encoding {
format,
version: 5,
address_size: 4,
};
let zero = Label::new();
let length = Label::new();
let start = Label::new();
let first = Label::new();
let end = Label::new();
let mut section = Section::with_endian(Endian::Little)
.mark(&zero)
.initial_length(format, &length, &start)
.D16(encoding.version)
.D8(encoding.address_size)
.D8(0)
.D32(20)
.mark(&first);
for i in 0..20 {
section = section.word(format.word_size(), 1000 + i);
}
section = section.mark(&end);
length.set_const((&end - &start) as u64);
let section = section.get_contents().unwrap();
let debug_ranges = DebugRanges::from(EndianSlice::new(&[], LittleEndian));
let debug_rnglists = DebugRngLists::from(EndianSlice::new(§ion, LittleEndian));
let ranges = RangeLists::new(debug_ranges, debug_rnglists);
let base = DebugRngListsBase((&first - &zero) as usize);
assert_eq!(
ranges.get_offset(encoding, base, DebugRngListsIndex(0)),
Ok(RangeListsOffset(base.0 + 1000))
);
assert_eq!(
ranges.get_offset(encoding, base, DebugRngListsIndex(19)),
Ok(RangeListsOffset(base.0 + 1019))
);
}
}
}