use crate::common::{
DebugAddrBase, DebugAddrIndex, DebugLocListsBase, DebugLocListsIndex, DwarfFileType, Encoding,
LocationListsOffset, SectionId,
};
use crate::constants;
use crate::endianity::Endianity;
use crate::read::{
lists::ListsHeader, DebugAddr, EndianSlice, Error, Expression, Range, RawRange, Reader,
ReaderAddress, ReaderOffset, ReaderOffsetId, Result, Section,
};
#[derive(Debug, Default, Clone, Copy)]
pub struct DebugLoc<R> {
pub(crate) section: R,
}
impl<'input, Endian> DebugLoc<EndianSlice<'input, Endian>>
where
Endian: Endianity,
{
pub fn new(section: &'input [u8], endian: Endian) -> Self {
Self::from(EndianSlice::new(section, endian))
}
}
impl<T> DebugLoc<T> {
pub(crate) fn borrow<'a, F, R>(&'a self, mut borrow: F) -> DebugLoc<R>
where
F: FnMut(&'a T) -> R,
{
borrow(&self.section).into()
}
}
impl<R> Section<R> for DebugLoc<R> {
fn id() -> SectionId {
SectionId::DebugLoc
}
fn reader(&self) -> &R {
&self.section
}
}
impl<R> From<R> for DebugLoc<R> {
fn from(section: R) -> Self {
DebugLoc { section }
}
}
#[derive(Debug, Default, Clone, Copy)]
pub struct DebugLocLists<R> {
section: R,
}
impl<'input, Endian> DebugLocLists<EndianSlice<'input, Endian>>
where
Endian: Endianity,
{
pub fn new(section: &'input [u8], endian: Endian) -> Self {
Self::from(EndianSlice::new(section, endian))
}
}
impl<T> DebugLocLists<T> {
pub(crate) fn borrow<'a, F, R>(&'a self, mut borrow: F) -> DebugLocLists<R>
where
F: FnMut(&'a T) -> R,
{
borrow(&self.section).into()
}
}
impl<R> Section<R> for DebugLocLists<R> {
fn id() -> SectionId {
SectionId::DebugLocLists
}
fn reader(&self) -> &R {
&self.section
}
}
impl<R> From<R> for DebugLocLists<R> {
fn from(section: R) -> Self {
DebugLocLists { section }
}
}
pub(crate) type LocListsHeader = ListsHeader;
impl<Offset> DebugLocListsBase<Offset>
where
Offset: ReaderOffset,
{
pub fn default_for_encoding_and_file(
encoding: Encoding,
file_type: DwarfFileType,
) -> DebugLocListsBase<Offset> {
if encoding.version >= 5 && file_type == DwarfFileType::Dwo {
DebugLocListsBase(Offset::from_u8(LocListsHeader::size_for_encoding(encoding)))
} else {
DebugLocListsBase(Offset::from_u8(0))
}
}
}
#[derive(Debug, Default, Clone, Copy)]
pub struct LocationLists<R> {
debug_loc: DebugLoc<R>,
debug_loclists: DebugLocLists<R>,
}
impl<R> LocationLists<R> {
pub fn new(debug_loc: DebugLoc<R>, debug_loclists: DebugLocLists<R>) -> LocationLists<R> {
LocationLists {
debug_loc,
debug_loclists,
}
}
}
impl<T> LocationLists<T> {
pub fn borrow<'a, F, R>(&'a self, mut borrow: F) -> LocationLists<R>
where
F: FnMut(&'a T) -> R,
{
LocationLists {
debug_loc: borrow(&self.debug_loc.section).into(),
debug_loclists: borrow(&self.debug_loclists.section).into(),
}
}
}
impl<R: Reader> LocationLists<R> {
pub fn locations(
&self,
offset: LocationListsOffset<R::Offset>,
unit_encoding: Encoding,
base_address: u64,
debug_addr: &DebugAddr<R>,
debug_addr_base: DebugAddrBase<R::Offset>,
) -> Result<LocListIter<R>> {
Ok(LocListIter::new(
self.raw_locations(offset, unit_encoding)?,
base_address,
debug_addr.clone(),
debug_addr_base,
))
}
pub fn locations_dwo(
&self,
offset: LocationListsOffset<R::Offset>,
unit_encoding: Encoding,
base_address: u64,
debug_addr: &DebugAddr<R>,
debug_addr_base: DebugAddrBase<R::Offset>,
) -> Result<LocListIter<R>> {
Ok(LocListIter::new(
self.raw_locations_dwo(offset, unit_encoding)?,
base_address,
debug_addr.clone(),
debug_addr_base,
))
}
pub fn raw_locations(
&self,
offset: LocationListsOffset<R::Offset>,
unit_encoding: Encoding,
) -> Result<RawLocListIter<R>> {
let (mut input, format) = if unit_encoding.version <= 4 {
(self.debug_loc.section.clone(), LocListsFormat::Bare)
} else {
(self.debug_loclists.section.clone(), LocListsFormat::Lle)
};
input.skip(offset.0)?;
Ok(RawLocListIter::new(input, unit_encoding, format))
}
pub fn raw_locations_dwo(
&self,
offset: LocationListsOffset<R::Offset>,
unit_encoding: Encoding,
) -> Result<RawLocListIter<R>> {
let mut input = if unit_encoding.version <= 4 {
self.debug_loc.section.clone()
} else {
self.debug_loclists.section.clone()
};
input.skip(offset.0)?;
Ok(RawLocListIter::new(
input,
unit_encoding,
LocListsFormat::Lle,
))
}
pub fn get_offset(
&self,
unit_encoding: Encoding,
base: DebugLocListsBase<R::Offset>,
index: DebugLocListsIndex<R::Offset>,
) -> Result<LocationListsOffset<R::Offset>> {
let format = unit_encoding.format;
let input = &mut self.debug_loclists.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| LocationListsOffset(base.0 + x))
}
pub fn lookup_offset_id(&self, id: ReaderOffsetId) -> Option<(SectionId, R::Offset)> {
self.debug_loc
.lookup_offset_id(id)
.or_else(|| self.debug_loclists.lookup_offset_id(id))
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
enum LocListsFormat {
Bare,
Lle,
}
#[derive(Debug)]
pub struct RawLocListIter<R: Reader> {
input: R,
encoding: Encoding,
format: LocListsFormat,
}
#[derive(Clone, Debug)]
pub enum RawLocListEntry<R: Reader> {
AddressOrOffsetPair {
begin: u64,
end: u64,
data: Expression<R>,
},
BaseAddress {
addr: u64,
},
BaseAddressx {
addr: DebugAddrIndex<R::Offset>,
},
StartxEndx {
begin: DebugAddrIndex<R::Offset>,
end: DebugAddrIndex<R::Offset>,
data: Expression<R>,
},
StartxLength {
begin: DebugAddrIndex<R::Offset>,
length: u64,
data: Expression<R>,
},
OffsetPair {
begin: u64,
end: u64,
data: Expression<R>,
},
DefaultLocation {
data: Expression<R>,
},
StartEnd {
begin: u64,
end: u64,
data: Expression<R>,
},
StartLength {
begin: u64,
length: u64,
data: Expression<R>,
},
}
fn parse_data<R: Reader>(input: &mut R, encoding: Encoding) -> Result<Expression<R>> {
if encoding.version >= 5 {
let len = R::Offset::from_u64(input.read_uleb128()?)?;
Ok(Expression(input.split(len)?))
} else {
let len = R::Offset::from_u16(input.read_u16()?);
Ok(Expression(input.split(len)?))
}
}
impl<R: Reader> RawLocListEntry<R> {
fn parse(input: &mut R, encoding: Encoding, format: LocListsFormat) -> Result<Option<Self>> {
Ok(match format {
LocListsFormat::Bare => {
let range = RawRange::parse(input, encoding.address_size)?;
if range.is_end() {
None
} else if range.is_base_address(encoding.address_size) {
Some(RawLocListEntry::BaseAddress { addr: range.end })
} else {
let len = R::Offset::from_u16(input.read_u16()?);
let data = Expression(input.split(len)?);
Some(RawLocListEntry::AddressOrOffsetPair {
begin: range.begin,
end: range.end,
data,
})
}
}
LocListsFormat::Lle => match constants::DwLle(input.read_u8()?) {
constants::DW_LLE_end_of_list => None,
constants::DW_LLE_base_addressx => Some(RawLocListEntry::BaseAddressx {
addr: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
}),
constants::DW_LLE_startx_endx => Some(RawLocListEntry::StartxEndx {
begin: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
end: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
data: parse_data(input, encoding)?,
}),
constants::DW_LLE_startx_length => Some(RawLocListEntry::StartxLength {
begin: DebugAddrIndex(input.read_uleb128().and_then(R::Offset::from_u64)?),
length: if encoding.version >= 5 {
input.read_uleb128()?
} else {
input.read_u32()? as u64
},
data: parse_data(input, encoding)?,
}),
constants::DW_LLE_offset_pair => Some(RawLocListEntry::OffsetPair {
begin: input.read_uleb128()?,
end: input.read_uleb128()?,
data: parse_data(input, encoding)?,
}),
constants::DW_LLE_default_location => Some(RawLocListEntry::DefaultLocation {
data: parse_data(input, encoding)?,
}),
constants::DW_LLE_base_address => Some(RawLocListEntry::BaseAddress {
addr: input.read_address(encoding.address_size)?,
}),
constants::DW_LLE_start_end => Some(RawLocListEntry::StartEnd {
begin: input.read_address(encoding.address_size)?,
end: input.read_address(encoding.address_size)?,
data: parse_data(input, encoding)?,
}),
constants::DW_LLE_start_length => Some(RawLocListEntry::StartLength {
begin: input.read_address(encoding.address_size)?,
length: input.read_uleb128()?,
data: parse_data(input, encoding)?,
}),
entry => {
return Err(Error::UnknownLocListsEntry(entry));
}
},
})
}
}
impl<R: Reader> RawLocListIter<R> {
fn new(input: R, encoding: Encoding, format: LocListsFormat) -> RawLocListIter<R> {
RawLocListIter {
input,
encoding,
format,
}
}
pub fn next(&mut self) -> Result<Option<RawLocListEntry<R>>> {
if self.input.is_empty() {
return Ok(None);
}
match RawLocListEntry::parse(&mut self.input, self.encoding, self.format) {
Ok(entry) => {
if entry.is_none() {
self.input.empty();
}
Ok(entry)
}
Err(e) => {
self.input.empty();
Err(e)
}
}
}
}
#[cfg(feature = "fallible-iterator")]
impl<R: Reader> fallible_iterator::FallibleIterator for RawLocListIter<R> {
type Item = RawLocListEntry<R>;
type Error = Error;
fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> {
RawLocListIter::next(self)
}
}
#[derive(Debug)]
pub struct LocListIter<R: Reader> {
raw: RawLocListIter<R>,
base_address: u64,
debug_addr: DebugAddr<R>,
debug_addr_base: DebugAddrBase<R::Offset>,
}
impl<R: Reader> LocListIter<R> {
fn new(
raw: RawLocListIter<R>,
base_address: u64,
debug_addr: DebugAddr<R>,
debug_addr_base: DebugAddrBase<R::Offset>,
) -> LocListIter<R> {
LocListIter {
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<LocationListEntry<R>>> {
loop {
let raw_loc = match self.raw.next()? {
Some(loc) => loc,
None => return Ok(None),
};
let loc = self.convert_raw(raw_loc)?;
if loc.is_some() {
return Ok(loc);
}
}
}
#[doc(hidden)]
pub fn next_raw(&mut self) -> Result<Option<RawLocListEntry<R>>> {
self.raw.next()
}
#[doc(hidden)]
pub fn convert_raw(
&mut self,
raw_loc: RawLocListEntry<R>,
) -> Result<Option<LocationListEntry<R>>> {
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, data) = match raw_loc {
RawLocListEntry::BaseAddress { addr } => {
self.base_address = addr;
return Ok(None);
}
RawLocListEntry::BaseAddressx { addr } => {
self.base_address = self.get_address(addr)?;
return Ok(None);
}
RawLocListEntry::StartxEndx { begin, end, data } => {
let begin = self.get_address(begin)?;
let end = self.get_address(end)?;
(Range { begin, end }, data)
}
RawLocListEntry::StartxLength {
begin,
length,
data,
} => {
let begin = self.get_address(begin)?;
let end = begin.wrapping_add_sized(length, address_size);
(Range { begin, end }, data)
}
RawLocListEntry::DefaultLocation { data } => (
Range {
begin: 0,
end: u64::MAX,
},
data,
),
RawLocListEntry::AddressOrOffsetPair { begin, end, data }
| RawLocListEntry::OffsetPair { begin, end, data } => {
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, data)
}
RawLocListEntry::StartEnd { begin, end, data } => (Range { begin, end }, data),
RawLocListEntry::StartLength {
begin,
length,
data,
} => {
let end = begin.wrapping_add_sized(length, address_size);
(Range { begin, end }, data)
}
};
if range.begin == tombstone || range.begin >= range.end {
return Ok(None);
}
Ok(Some(LocationListEntry { range, data }))
}
}
#[cfg(feature = "fallible-iterator")]
impl<R: Reader> fallible_iterator::FallibleIterator for LocListIter<R> {
type Item = LocationListEntry<R>;
type Error = Error;
fn next(&mut self) -> ::core::result::Result<Option<Self::Item>, Self::Error> {
LocListIter::next(self)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct LocationListEntry<R: Reader> {
pub range: Range,
pub data: Expression<R>,
}
#[cfg(test)]
mod tests {
use super::*;
use crate::common::Format;
use crate::constants::*;
use crate::endianity::LittleEndian;
use crate::read::{EndianSlice, Range};
use crate::test_util::GimliSectionMethods;
use alloc::vec::Vec;
use test_assembler::{Endian, Label, LabelMaker, Section};
#[test]
fn test_loclists() {
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_locations = Vec::new();
let mut expect_location = |begin, end, data| {
expected_locations.push(LocationListEntry {
range: Range { begin, end },
data: Expression(EndianSlice::new(data, LittleEndian)),
});
};
section = section.L8(DW_LLE_offset_pair.0).uleb(0x10200).uleb(0x10300);
section = section.uleb(4).L32(2);
expect_location(0x0101_0200, 0x0101_0300, &[2, 0, 0, 0]);
section = section.L8(DW_LLE_base_address.0).word(size, 0x0200_0000);
section = section.L8(DW_LLE_offset_pair.0).uleb(0x10400).uleb(0x10500);
section = section.uleb(4).L32(3);
expect_location(0x0201_0400, 0x0201_0500, &[3, 0, 0, 0]);
section = section
.L8(DW_LLE_start_end.0)
.word(size, 0x201_0a00)
.word(size, 0x201_0b00);
section = section.uleb(4).L32(6);
expect_location(0x0201_0a00, 0x0201_0b00, &[6, 0, 0, 0]);
section = section
.L8(DW_LLE_start_length.0)
.word(size, 0x201_0c00)
.uleb(0x100);
section = section.uleb(4).L32(7);
expect_location(0x0201_0c00, 0x0201_0d00, &[7, 0, 0, 0]);
section = section.L8(DW_LLE_base_address.0).word(size, 0);
section = section.L8(DW_LLE_offset_pair.0).uleb(0).uleb(1);
section = section.uleb(4).L32(8);
expect_location(0, 1, &[8, 0, 0, 0]);
section = section.L8(DW_LLE_base_address.0).word(size, 0);
section = section.L8(DW_LLE_offset_pair.0).uleb(0).uleb(tombstone);
section = section.uleb(4).L32(9);
expect_location(0, tombstone, &[9, 0, 0, 0]);
section = section.L8(DW_LLE_default_location.0).uleb(4).L32(10);
expect_location(0, u64::MAX, &[10, 0, 0, 0]);
section = section.L8(DW_LLE_base_addressx.0).uleb(0);
section = section.L8(DW_LLE_offset_pair.0).uleb(0x10100).uleb(0x10200);
section = section.uleb(4).L32(11);
expect_location(0x0301_0100, 0x0301_0200, &[11, 0, 0, 0]);
section = section.L8(DW_LLE_startx_endx.0).uleb(1).uleb(2);
section = section.uleb(4).L32(12);
expect_location(0x0301_0300, 0x0301_0400, &[12, 0, 0, 0]);
section = section.L8(DW_LLE_startx_length.0).uleb(3).uleb(0x100);
section = section.uleb(4).L32(13);
expect_location(0x0301_0500, 0x0301_0600, &[13, 0, 0, 0]);
section = section.L8(DW_LLE_base_addressx.0).uleb(4);
section = section.L8(DW_LLE_offset_pair.0).uleb(0x11100).uleb(0x11200);
section = section.uleb(4).L32(20);
section = section.L8(DW_LLE_base_address.0).word(size, tombstone);
section = section.L8(DW_LLE_offset_pair.0).uleb(0x11300).uleb(0x11400);
section = section.uleb(4).L32(21);
section = section.L8(DW_LLE_startx_endx.0).uleb(4).uleb(5);
section = section.uleb(4).L32(22);
section = section.L8(DW_LLE_startx_length.0).uleb(4).uleb(0x100);
section = section.uleb(4).L32(23);
section = section
.L8(DW_LLE_start_end.0)
.word(size, tombstone)
.word(size, 0x201_1500);
section = section.uleb(4).L32(24);
section = section
.L8(DW_LLE_start_length.0)
.word(size, tombstone)
.uleb(0x100);
section = section.uleb(4).L32(25);
section = section.L8(DW_LLE_startx_endx.0).uleb(6).uleb(6);
section = section.uleb(4).L32(30);
section = section
.L8(DW_LLE_start_end.0)
.word(size, tombstone_0)
.word(size, tombstone_0);
section = section.uleb(4).L32(31);
section = section.L8(DW_LLE_base_address.0).word(size, 0);
section = section.L8(DW_LLE_offset_pair.0).uleb(0).uleb(0);
section = section.uleb(4).L32(41);
section = section.L8(DW_LLE_base_address.0).word(size, 0x10000);
section = section.L8(DW_LLE_offset_pair.0).uleb(0x1234).uleb(0x1234);
section = section.uleb(4).L32(42);
section = section
.L8(DW_LLE_start_end.0)
.word(size, 0x201_1600)
.word(size, 0x201_1700);
section = section.uleb(4).L32(100);
expect_location(0x0201_1600, 0x0201_1700, &[100, 0, 0, 0]);
section = section.L8(DW_LLE_end_of_list.0);
section = section.mark(&end);
section = section.word(size, 0x1234_5678);
length.set_const((&end - &start) as u64);
let offset = LocationListsOffset((&first - §ion.start()) as usize);
let buf = section.get_contents().unwrap();
let debug_loc = DebugLoc::new(&[], LittleEndian);
let debug_loclists = DebugLocLists::new(&buf, LittleEndian);
let loclists = LocationLists::new(debug_loc, debug_loclists);
let mut locations = loclists
.locations(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
.unwrap();
for expected_location in expected_locations {
let location = locations.next();
assert_eq!(
location,
Ok(Some(expected_location)),
"read {:x?}, expect {:x?}",
location,
expected_location
);
}
assert_eq!(locations.next(), Ok(None));
}
}
#[test]
fn test_location_list() {
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)
.L16(4)
.L32(1)
.mark(&first);
let mut expected_locations = Vec::new();
let mut expect_location = |begin, end, data| {
expected_locations.push(LocationListEntry {
range: Range { begin, end },
data: Expression(EndianSlice::new(data, LittleEndian)),
});
};
section = section.word(size, 0x10200).word(size, 0x10300);
section = section.L16(4).L32(2);
expect_location(0x0101_0200, 0x0101_0300, &[2, 0, 0, 0]);
section = section.word(size, base).word(size, 0x0200_0000);
section = section.word(size, 0x10400).word(size, 0x10500);
section = section.L16(4).L32(3);
expect_location(0x0201_0400, 0x0201_0500, &[3, 0, 0, 0]);
section = section.word(size, 0x10600).word(size, 0x10600);
section = section.L16(4).L32(4);
section = section.word(size, 0x10800).word(size, 0x10900);
section = section.L16(4).L32(5);
expect_location(0x0201_0800, 0x0201_0900, &[5, 0, 0, 0]);
section = section.word(size, base).word(size, 0);
section = section.word(size, 0).word(size, 1);
section = section.L16(4).L32(6);
expect_location(0, 1, &[6, 0, 0, 0]);
section = section.word(size, base).word(size, 0);
section = section.word(size, 0).word(size, base);
section = section.L16(4).L32(7);
expect_location(0, base, &[7, 0, 0, 0]);
section = section.word(size, tombstone).word(size, tombstone);
section = section.L16(4).L32(8);
section = section.word(size, base).word(size, tombstone);
section = section.word(size, 0x10a00).word(size, 0x10b00);
section = section.L16(4).L32(9);
section = section.word(size, 0).word(size, 0);
section = section.word(size, 0x1234_5678);
let buf = section.get_contents().unwrap();
let debug_loc = DebugLoc::new(&buf, LittleEndian);
let debug_loclists = DebugLocLists::new(&[], LittleEndian);
let loclists = LocationLists::new(debug_loc, debug_loclists);
let offset = LocationListsOffset((&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 locations = loclists
.locations(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
.unwrap();
for expected_location in expected_locations {
let location = locations.next();
assert_eq!(
location,
Ok(Some(expected_location)),
"read {:x?}, expect {:x?}",
location,
expected_location
);
}
assert_eq!(locations.next(), Ok(None));
let mut locations = loclists
.locations(
LocationListsOffset(buf.len()),
encoding,
0x0100_0000,
debug_addr,
debug_addr_base,
)
.unwrap();
assert_eq!(locations.next(), Ok(None));
}
}
#[test]
fn test_locations_invalid() {
#[rustfmt::skip]
let section = Section::with_endian(Endian::Little)
.L32(0x20000).L32(0x10000).L16(4).L32(1)
.L32(0x20000).L32(0xff01_0000).L16(4).L32(2);
let buf = section.get_contents().unwrap();
let debug_loc = DebugLoc::new(&buf, LittleEndian);
let debug_loclists = DebugLocLists::new(&[], LittleEndian);
let loclists = LocationLists::new(debug_loc, debug_loclists);
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 locations = loclists
.locations(
LocationListsOffset(0x0),
encoding,
0x0100_0000,
debug_addr,
debug_addr_base,
)
.unwrap();
assert_eq!(locations.next(), Ok(None));
let mut locations = loclists
.locations(
LocationListsOffset(14),
encoding,
0x0100_0000,
debug_addr,
debug_addr_base,
)
.unwrap();
assert_eq!(locations.next(), Ok(None));
match loclists.locations(
LocationListsOffset(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_loc = DebugLoc::from(EndianSlice::new(&[], LittleEndian));
let debug_loclists = DebugLocLists::from(EndianSlice::new(§ion, LittleEndian));
let locations = LocationLists::new(debug_loc, debug_loclists);
let base = DebugLocListsBase((&first - &zero) as usize);
assert_eq!(
locations.get_offset(encoding, base, DebugLocListsIndex(0)),
Ok(LocationListsOffset(base.0 + 1000))
);
assert_eq!(
locations.get_offset(encoding, base, DebugLocListsIndex(19)),
Ok(LocationListsOffset(base.0 + 1019))
);
}
}
#[test]
fn test_loclists_gnu_v4_split_dwarf() {
#[rustfmt::skip]
let buf = [
0x03, 0x00, 0x08, 0x00, 0x00, 0x00, 0x03, 0x00, 0x11, 0x00, 0x9f, ];
let data_buf = [0x11, 0x00, 0x9f];
let expected_data = EndianSlice::new(&data_buf, LittleEndian);
let debug_loc = DebugLoc::new(&buf, LittleEndian);
let debug_loclists = DebugLocLists::new(&[], LittleEndian);
let loclists = LocationLists::new(debug_loc, debug_loclists);
let debug_addr =
&DebugAddr::from(EndianSlice::new(&[0x01, 0x02, 0x03, 0x04], LittleEndian));
let debug_addr_base = DebugAddrBase(0);
let encoding = Encoding {
format: Format::Dwarf32,
version: 4,
address_size: 4,
};
let mut locations = loclists
.locations_dwo(
LocationListsOffset(0x0),
encoding,
0,
debug_addr,
debug_addr_base,
)
.unwrap();
assert_eq!(
locations.next(),
Ok(Some(LocationListEntry {
range: Range {
begin: 0x0403_0201,
end: 0x0403_0209
},
data: Expression(expected_data),
}))
);
}
}