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-rw-r--r--vendor/gimli/src/read/loclists.rs1627
1 files changed, 1627 insertions, 0 deletions
diff --git a/vendor/gimli/src/read/loclists.rs b/vendor/gimli/src/read/loclists.rs
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+++ b/vendor/gimli/src/read/loclists.rs
@@ -0,0 +1,1627 @@
+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,
+ ReaderOffset, ReaderOffsetId, Result, Section,
+};
+
+/// The raw contents of the `.debug_loc` section.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct DebugLoc<R> {
+ pub(crate) section: R,
+}
+
+impl<'input, Endian> DebugLoc<EndianSlice<'input, Endian>>
+where
+ Endian: Endianity,
+{
+ /// Construct a new `DebugLoc` instance from the data in the `.debug_loc`
+ /// section.
+ ///
+ /// It is the caller's responsibility to read the `.debug_loc` 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::{DebugLoc, LittleEndian};
+ ///
+ /// # let buf = [0x00, 0x01, 0x02, 0x03];
+ /// # let read_debug_loc_section_somehow = || &buf;
+ /// let debug_loc = DebugLoc::new(read_debug_loc_section_somehow(), LittleEndian);
+ /// ```
+ pub fn new(section: &'input [u8], endian: Endian) -> Self {
+ Self::from(EndianSlice::new(section, endian))
+ }
+}
+
+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 }
+ }
+}
+
+/// The `DebugLocLists` struct represents the DWARF data
+/// found in the `.debug_loclists` section.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct DebugLocLists<R> {
+ section: R,
+}
+
+impl<'input, Endian> DebugLocLists<EndianSlice<'input, Endian>>
+where
+ Endian: Endianity,
+{
+ /// Construct a new `DebugLocLists` instance from the data in the `.debug_loclists`
+ /// section.
+ ///
+ /// It is the caller's responsibility to read the `.debug_loclists` 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::{DebugLocLists, LittleEndian};
+ ///
+ /// # let buf = [0x00, 0x01, 0x02, 0x03];
+ /// # let read_debug_loclists_section_somehow = || &buf;
+ /// let debug_loclists = DebugLocLists::new(read_debug_loclists_section_somehow(), LittleEndian);
+ /// ```
+ pub fn new(section: &'input [u8], endian: Endian) -> Self {
+ Self::from(EndianSlice::new(section, endian))
+ }
+}
+
+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,
+{
+ /// Returns a `DebugLocListsBase` with the default value of DW_AT_loclists_base
+ /// for the given `Encoding` and `DwarfFileType`.
+ pub fn default_for_encoding_and_file(
+ encoding: Encoding,
+ file_type: DwarfFileType,
+ ) -> DebugLocListsBase<Offset> {
+ if encoding.version >= 5 && file_type == DwarfFileType::Dwo {
+ // In .dwo files, the compiler omits the DW_AT_loclists_base attribute (because there is
+ // only a single unit in the file) but we must skip past the header, which the attribute
+ // would normally do for us.
+ DebugLocListsBase(Offset::from_u8(LocListsHeader::size_for_encoding(encoding)))
+ } else {
+ DebugLocListsBase(Offset::from_u8(0))
+ }
+ }
+}
+
+/// The DWARF data found in `.debug_loc` and `.debug_loclists` sections.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct LocationLists<R> {
+ debug_loc: DebugLoc<R>,
+ debug_loclists: DebugLocLists<R>,
+}
+
+impl<R> LocationLists<R> {
+ /// Construct a new `LocationLists` instance from the data in the `.debug_loc` and
+ /// `.debug_loclists` sections.
+ pub fn new(debug_loc: DebugLoc<R>, debug_loclists: DebugLocLists<R>) -> LocationLists<R> {
+ LocationLists {
+ debug_loc,
+ debug_loclists,
+ }
+ }
+}
+
+impl<T> LocationLists<T> {
+ /// Create a `LocationLists` 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::LocationLists<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) -> 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> {
+ /// Iterate over the `LocationListEntry`s starting at the given offset.
+ ///
+ /// The `unit_encoding` must match the compilation unit that the
+ /// offset was contained in.
+ ///
+ /// The `base_address` should be obtained from the `DW_AT_low_pc` attribute in the
+ /// `DW_TAG_compile_unit` entry for the compilation unit that contains this location
+ /// list.
+ ///
+ /// Can be [used with
+ /// `FallibleIterator`](./index.html#using-with-fallibleiterator).
+ 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,
+ ))
+ }
+
+ /// Similar to `locations`, but with special handling for .dwo files.
+ /// This should only been used when this `LocationLists` was loaded from a
+ /// .dwo file.
+ 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,
+ ))
+ }
+
+ /// Iterate over the raw `LocationListEntry`s starting at the given offset.
+ ///
+ /// The `unit_encoding` must match the compilation unit that the
+ /// offset was contained in.
+ ///
+ /// This iterator does not perform any processing of the location entries,
+ /// such as handling base addresses.
+ ///
+ /// Can be [used with
+ /// `FallibleIterator`](./index.html#using-with-fallibleiterator).
+ 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))
+ }
+
+ /// Similar to `raw_locations`, but with special handling for .dwo files.
+ /// This should only been used when this `LocationLists` was loaded from a
+ /// .dwo file.
+ pub fn raw_locations_dwo(
+ &self,
+ offset: LocationListsOffset<R::Offset>,
+ unit_encoding: Encoding,
+ ) -> Result<RawLocListIter<R>> {
+ let mut input = if unit_encoding.version <= 4 {
+ // In the GNU split dwarf extension the locations are present in the
+ // .debug_loc section but are encoded with the DW_LLE values used
+ // for the DWARF 5 .debug_loclists section.
+ self.debug_loc.section.clone()
+ } else {
+ self.debug_loclists.section.clone()
+ };
+ input.skip(offset.0)?;
+ Ok(RawLocListIter::new(
+ input,
+ unit_encoding,
+ LocListsFormat::Lle,
+ ))
+ }
+
+ /// Returns the `.debug_loclists` offset at the given `base` and `index`.
+ ///
+ /// The `base` must be the `DW_AT_loclists_base` value from the compilation unit DIE.
+ /// This is an offset that points to the first entry following the header.
+ ///
+ /// The `index` is the value of a `DW_FORM_loclistx` attribute.
+ 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))
+ }
+
+ /// Call `Reader::lookup_offset_id` for each section, and return the first match.
+ 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 {
+ /// The bare location list format used before DWARF 5.
+ Bare,
+ /// The DW_LLE encoded range list format used in DWARF 5 and the non-standard GNU
+ /// split dwarf extension.
+ Lle,
+}
+
+/// A raw iterator over a location list.
+///
+/// This iterator does not perform any processing of the location entries,
+/// such as handling base addresses.
+#[derive(Debug)]
+pub struct RawLocListIter<R: Reader> {
+ input: R,
+ encoding: Encoding,
+ format: LocListsFormat,
+}
+
+/// A raw entry in .debug_loclists.
+#[derive(Clone, Debug)]
+pub enum RawLocListEntry<R: Reader> {
+ /// A location from DWARF version <= 4.
+ AddressOrOffsetPair {
+ /// Start of range. May be an address or an offset.
+ begin: u64,
+ /// End of range. May be an address or an offset.
+ end: u64,
+ /// expression
+ data: Expression<R>,
+ },
+ /// DW_LLE_base_address
+ BaseAddress {
+ /// base address
+ addr: u64,
+ },
+ /// DW_LLE_base_addressx
+ BaseAddressx {
+ /// base address
+ addr: DebugAddrIndex<R::Offset>,
+ },
+ /// DW_LLE_startx_endx
+ StartxEndx {
+ /// start of range
+ begin: DebugAddrIndex<R::Offset>,
+ /// end of range
+ end: DebugAddrIndex<R::Offset>,
+ /// expression
+ data: Expression<R>,
+ },
+ /// DW_LLE_startx_length
+ StartxLength {
+ /// start of range
+ begin: DebugAddrIndex<R::Offset>,
+ /// length of range
+ length: u64,
+ /// expression
+ data: Expression<R>,
+ },
+ /// DW_LLE_offset_pair
+ OffsetPair {
+ /// start of range
+ begin: u64,
+ /// end of range
+ end: u64,
+ /// expression
+ data: Expression<R>,
+ },
+ /// DW_LLE_default_location
+ DefaultLocation {
+ /// expression
+ data: Expression<R>,
+ },
+ /// DW_LLE_start_end
+ StartEnd {
+ /// start of range
+ begin: u64,
+ /// end of range
+ end: u64,
+ /// expression
+ data: Expression<R>,
+ },
+ /// DW_LLE_start_length
+ StartLength {
+ /// start of range
+ begin: u64,
+ /// length of range
+ length: u64,
+ /// expression
+ 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 {
+ // In the GNU split-dwarf extension this is a fixed 2 byte value.
+ let len = R::Offset::from_u16(input.read_u16()?);
+ Ok(Expression(input.split(len)?))
+ }
+}
+
+impl<R: Reader> RawLocListEntry<R> {
+ /// Parse a location list entry from `.debug_loclists`
+ 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 {
+ // In the GNU split-dwarf extension this is a fixed 4 byte value.
+ 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)?,
+ }),
+ _ => {
+ return Err(Error::InvalidAddressRange);
+ }
+ },
+ })
+ }
+}
+
+impl<R: Reader> RawLocListIter<R> {
+ /// Construct a `RawLocListIter`.
+ fn new(input: R, encoding: Encoding, format: LocListsFormat) -> RawLocListIter<R> {
+ RawLocListIter {
+ input,
+ encoding,
+ format,
+ }
+ }
+
+ /// Advance the iterator to the next location.
+ 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)
+ }
+}
+
+/// An iterator over a location list.
+///
+/// This iterator internally handles processing of base address selection entries
+/// and list end entries. Thus, it only returns location entries that are valid
+/// and already adjusted for the base address.
+#[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> {
+ /// Construct a `LocListIter`.
+ 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)
+ }
+
+ /// Advance the iterator to the next location.
+ 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);
+ }
+ }
+ }
+
+ /// Return the next raw location.
+ ///
+ /// The raw location should be passed to `convert_raw`.
+ #[doc(hidden)]
+ pub fn next_raw(&mut self) -> Result<Option<RawLocListEntry<R>>> {
+ self.raw.next()
+ }
+
+ /// Convert a raw location into a location, and update the state of the iterator.
+ ///
+ /// The raw location should have been obtained from `next_raw`.
+ #[doc(hidden)]
+ pub fn convert_raw(
+ &mut self,
+ raw_loc: RawLocListEntry<R>,
+ ) -> Result<Option<LocationListEntry<R>>> {
+ let mask = !0 >> (64 - self.raw.encoding.address_size * 8);
+ 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(length) & mask;
+ (Range { begin, end }, data)
+ }
+ RawLocListEntry::DefaultLocation { data } => (
+ Range {
+ begin: 0,
+ end: u64::max_value(),
+ },
+ 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(length) & mask;
+ (Range { begin, end }, data)
+ }
+ };
+
+ if range.begin == tombstone {
+ return Ok(None);
+ }
+
+ if range.begin > range.end {
+ self.raw.input.empty();
+ return Err(Error::InvalidLocationAddressRange);
+ }
+
+ 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)
+ }
+}
+
+/// A location list entry from the `.debug_loc` or `.debug_loclists` sections.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct LocationListEntry<R: Reader> {
+ /// The address range that this location is valid for.
+ pub range: Range,
+
+ /// The data containing a single location description.
+ pub data: Expression<R>,
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+ use crate::common::Format;
+ use crate::endianity::LittleEndian;
+ use crate::read::{EndianSlice, Range};
+ use crate::test_util::GimliSectionMethods;
+ use test_assembler::{Endian, Label, LabelMaker, Section};
+
+ #[test]
+ fn test_loclists_32() {
+ let tombstone = !0u32;
+ let encoding = Encoding {
+ format: Format::Dwarf32,
+ version: 5,
+ address_size: 4,
+ };
+
+ let section = Section::with_endian(Endian::Little)
+ .L32(0x0300_0000)
+ .L32(0x0301_0300)
+ .L32(0x0301_0400)
+ .L32(0x0301_0500)
+ .L32(tombstone)
+ .L32(0x0301_0600);
+ let buf = section.get_contents().unwrap();
+ let debug_addr = &DebugAddr::from(EndianSlice::new(&buf, LittleEndian));
+ let debug_addr_base = DebugAddrBase(0);
+
+ let start = Label::new();
+ let first = Label::new();
+ let size = Label::new();
+ #[rustfmt::skip]
+ let section = Section::with_endian(Endian::Little)
+ // Header
+ .mark(&start)
+ .L32(&size)
+ .L16(encoding.version)
+ .L8(encoding.address_size)
+ .L8(0)
+ .L32(0)
+ .mark(&first)
+ // OffsetPair
+ .L8(4).uleb(0x10200).uleb(0x10300).uleb(4).L32(2)
+ // A base address selection followed by an OffsetPair.
+ .L8(6).L32(0x0200_0000)
+ .L8(4).uleb(0x10400).uleb(0x10500).uleb(4).L32(3)
+ // An empty OffsetPair followed by a normal OffsetPair.
+ .L8(4).uleb(0x10600).uleb(0x10600).uleb(4).L32(4)
+ .L8(4).uleb(0x10800).uleb(0x10900).uleb(4).L32(5)
+ // A StartEnd
+ .L8(7).L32(0x201_0a00).L32(0x201_0b00).uleb(4).L32(6)
+ // A StartLength
+ .L8(8).L32(0x201_0c00).uleb(0x100).uleb(4).L32(7)
+ // An OffsetPair that starts at 0.
+ .L8(4).uleb(0).uleb(1).uleb(4).L32(8)
+ // An OffsetPair that ends at -1.
+ .L8(6).L32(0)
+ .L8(4).uleb(0).uleb(0xffff_ffff).uleb(4).L32(9)
+ // A DefaultLocation
+ .L8(5).uleb(4).L32(10)
+ // A BaseAddressx + OffsetPair
+ .L8(1).uleb(0)
+ .L8(4).uleb(0x10100).uleb(0x10200).uleb(4).L32(11)
+ // A StartxEndx
+ .L8(2).uleb(1).uleb(2).uleb(4).L32(12)
+ // A StartxLength
+ .L8(3).uleb(3).uleb(0x100).uleb(4).L32(13)
+
+ // Tombstone entries, all of which should be ignored.
+ // A BaseAddressx that is a tombstone.
+ .L8(1).uleb(4)
+ .L8(4).uleb(0x11100).uleb(0x11200).uleb(4).L32(20)
+ // A BaseAddress that is a tombstone.
+ .L8(6).L32(tombstone)
+ .L8(4).uleb(0x11300).uleb(0x11400).uleb(4).L32(21)
+ // A StartxEndx that is a tombstone.
+ .L8(2).uleb(4).uleb(5).uleb(4).L32(22)
+ // A StartxLength that is a tombstone.
+ .L8(3).uleb(4).uleb(0x100).uleb(4).L32(23)
+ // A StartEnd that is a tombstone.
+ .L8(7).L32(tombstone).L32(0x201_1500).uleb(4).L32(24)
+ // A StartLength that is a tombstone.
+ .L8(8).L32(tombstone).uleb(0x100).uleb(4).L32(25)
+ // A StartEnd (not ignored)
+ .L8(7).L32(0x201_1600).L32(0x201_1700).uleb(4).L32(26)
+
+ // A range end.
+ .L8(0)
+ // Some extra data.
+ .L32(0xffff_ffff);
+ size.set_const((&section.here() - &start - 4) as u64);
+
+ 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 offset = LocationListsOffset((&first - &start) as usize);
+ let mut locations = loclists
+ .locations(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+ .unwrap();
+
+ // A normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0101_0200,
+ end: 0x0101_0300,
+ },
+ data: Expression(EndianSlice::new(&[2, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A base address selection followed by a normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0400,
+ end: 0x0201_0500,
+ },
+ data: Expression(EndianSlice::new(&[3, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // An empty location range followed by a normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0600,
+ end: 0x0201_0600,
+ },
+ data: Expression(EndianSlice::new(&[4, 0, 0, 0], LittleEndian)),
+ }))
+ );
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0800,
+ end: 0x0201_0900,
+ },
+ data: Expression(EndianSlice::new(&[5, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0a00,
+ end: 0x0201_0b00,
+ },
+ data: Expression(EndianSlice::new(&[6, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0c00,
+ end: 0x0201_0d00,
+ },
+ data: Expression(EndianSlice::new(&[7, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location range that starts at 0.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0200_0000,
+ end: 0x0200_0001,
+ },
+ data: Expression(EndianSlice::new(&[8, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location range that ends at -1.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0000_0000,
+ end: 0xffff_ffff,
+ },
+ data: Expression(EndianSlice::new(&[9, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A DefaultLocation.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0,
+ end: u64::max_value(),
+ },
+ data: Expression(EndianSlice::new(&[10, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A BaseAddressx + OffsetPair
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0301_0100,
+ end: 0x0301_0200,
+ },
+ data: Expression(EndianSlice::new(&[11, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A StartxEndx
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0301_0300,
+ end: 0x0301_0400,
+ },
+ data: Expression(EndianSlice::new(&[12, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A StartxLength
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0301_0500,
+ end: 0x0301_0600,
+ },
+ data: Expression(EndianSlice::new(&[13, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A StartEnd location following the tombstones
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_1600,
+ end: 0x0201_1700,
+ },
+ data: Expression(EndianSlice::new(&[26, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location list end.
+ assert_eq!(locations.next(), Ok(None));
+
+ // An offset at the end of buf.
+ 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_loclists_64() {
+ let tombstone = !0u64;
+ let encoding = Encoding {
+ format: Format::Dwarf64,
+ version: 5,
+ address_size: 8,
+ };
+
+ let section = Section::with_endian(Endian::Little)
+ .L64(0x0300_0000)
+ .L64(0x0301_0300)
+ .L64(0x0301_0400)
+ .L64(0x0301_0500)
+ .L64(tombstone)
+ .L64(0x0301_0600);
+ let buf = section.get_contents().unwrap();
+ let debug_addr = &DebugAddr::from(EndianSlice::new(&buf, LittleEndian));
+ let debug_addr_base = DebugAddrBase(0);
+
+ let start = Label::new();
+ let first = Label::new();
+ let size = Label::new();
+ #[rustfmt::skip]
+ let section = Section::with_endian(Endian::Little)
+ // Header
+ .mark(&start)
+ .L32(0xffff_ffff)
+ .L64(&size)
+ .L16(encoding.version)
+ .L8(encoding.address_size)
+ .L8(0)
+ .L32(0)
+ .mark(&first)
+ // OffsetPair
+ .L8(4).uleb(0x10200).uleb(0x10300).uleb(4).L32(2)
+ // A base address selection followed by an OffsetPair.
+ .L8(6).L64(0x0200_0000)
+ .L8(4).uleb(0x10400).uleb(0x10500).uleb(4).L32(3)
+ // An empty OffsetPair followed by a normal OffsetPair.
+ .L8(4).uleb(0x10600).uleb(0x10600).uleb(4).L32(4)
+ .L8(4).uleb(0x10800).uleb(0x10900).uleb(4).L32(5)
+ // A StartEnd
+ .L8(7).L64(0x201_0a00).L64(0x201_0b00).uleb(4).L32(6)
+ // A StartLength
+ .L8(8).L64(0x201_0c00).uleb(0x100).uleb(4).L32(7)
+ // An OffsetPair that starts at 0.
+ .L8(4).uleb(0).uleb(1).uleb(4).L32(8)
+ // An OffsetPair that ends at -1.
+ .L8(6).L64(0)
+ .L8(4).uleb(0).uleb(0xffff_ffff).uleb(4).L32(9)
+ // A DefaultLocation
+ .L8(5).uleb(4).L32(10)
+ // A BaseAddressx + OffsetPair
+ .L8(1).uleb(0)
+ .L8(4).uleb(0x10100).uleb(0x10200).uleb(4).L32(11)
+ // A StartxEndx
+ .L8(2).uleb(1).uleb(2).uleb(4).L32(12)
+ // A StartxLength
+ .L8(3).uleb(3).uleb(0x100).uleb(4).L32(13)
+
+ // Tombstone entries, all of which should be ignored.
+ // A BaseAddressx that is a tombstone.
+ .L8(1).uleb(4)
+ .L8(4).uleb(0x11100).uleb(0x11200).uleb(4).L32(20)
+ // A BaseAddress that is a tombstone.
+ .L8(6).L64(tombstone)
+ .L8(4).uleb(0x11300).uleb(0x11400).uleb(4).L32(21)
+ // A StartxEndx that is a tombstone.
+ .L8(2).uleb(4).uleb(5).uleb(4).L32(22)
+ // A StartxLength that is a tombstone.
+ .L8(3).uleb(4).uleb(0x100).uleb(4).L32(23)
+ // A StartEnd that is a tombstone.
+ .L8(7).L64(tombstone).L64(0x201_1500).uleb(4).L32(24)
+ // A StartLength that is a tombstone.
+ .L8(8).L64(tombstone).uleb(0x100).uleb(4).L32(25)
+ // A StartEnd (not ignored)
+ .L8(7).L64(0x201_1600).L64(0x201_1700).uleb(4).L32(26)
+
+ // A range end.
+ .L8(0)
+ // Some extra data.
+ .L32(0xffff_ffff);
+ size.set_const((&section.here() - &start - 12) as u64);
+
+ 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 offset = LocationListsOffset((&first - &start) as usize);
+ let mut locations = loclists
+ .locations(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+ .unwrap();
+
+ // A normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0101_0200,
+ end: 0x0101_0300,
+ },
+ data: Expression(EndianSlice::new(&[2, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A base address selection followed by a normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0400,
+ end: 0x0201_0500,
+ },
+ data: Expression(EndianSlice::new(&[3, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // An empty location range followed by a normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0600,
+ end: 0x0201_0600,
+ },
+ data: Expression(EndianSlice::new(&[4, 0, 0, 0], LittleEndian)),
+ }))
+ );
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0800,
+ end: 0x0201_0900,
+ },
+ data: Expression(EndianSlice::new(&[5, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0a00,
+ end: 0x0201_0b00,
+ },
+ data: Expression(EndianSlice::new(&[6, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0c00,
+ end: 0x0201_0d00,
+ },
+ data: Expression(EndianSlice::new(&[7, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location range that starts at 0.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0200_0000,
+ end: 0x0200_0001,
+ },
+ data: Expression(EndianSlice::new(&[8, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location range that ends at -1.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0000_0000,
+ end: 0xffff_ffff,
+ },
+ data: Expression(EndianSlice::new(&[9, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A DefaultLocation.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0,
+ end: u64::max_value(),
+ },
+ data: Expression(EndianSlice::new(&[10, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A BaseAddressx + OffsetPair
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0301_0100,
+ end: 0x0301_0200,
+ },
+ data: Expression(EndianSlice::new(&[11, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A StartxEndx
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0301_0300,
+ end: 0x0301_0400,
+ },
+ data: Expression(EndianSlice::new(&[12, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A StartxLength
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0301_0500,
+ end: 0x0301_0600,
+ },
+ data: Expression(EndianSlice::new(&[13, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A StartEnd location following the tombstones
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_1600,
+ end: 0x0201_1700,
+ },
+ data: Expression(EndianSlice::new(&[26, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location list end.
+ assert_eq!(locations.next(), Ok(None));
+
+ // An offset at the end of buf.
+ 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_location_list_32() {
+ let tombstone = !0u32 - 1;
+ let start = Label::new();
+ let first = Label::new();
+ #[rustfmt::skip]
+ let section = Section::with_endian(Endian::Little)
+ // A location before the offset.
+ .mark(&start)
+ .L32(0x10000).L32(0x10100).L16(4).L32(1)
+ .mark(&first)
+ // A normal location.
+ .L32(0x10200).L32(0x10300).L16(4).L32(2)
+ // A base address selection followed by a normal location.
+ .L32(0xffff_ffff).L32(0x0200_0000)
+ .L32(0x10400).L32(0x10500).L16(4).L32(3)
+ // An empty location range followed by a normal location.
+ .L32(0x10600).L32(0x10600).L16(4).L32(4)
+ .L32(0x10800).L32(0x10900).L16(4).L32(5)
+ // A location range that starts at 0.
+ .L32(0).L32(1).L16(4).L32(6)
+ // A location range that ends at -1.
+ .L32(0xffff_ffff).L32(0x0000_0000)
+ .L32(0).L32(0xffff_ffff).L16(4).L32(7)
+ // A normal location with tombstone.
+ .L32(tombstone).L32(tombstone).L16(4).L32(8)
+ // A base address selection with tombstone followed by a normal location.
+ .L32(0xffff_ffff).L32(tombstone)
+ .L32(0x10a00).L32(0x10b00).L16(4).L32(9)
+ // A location list end.
+ .L32(0).L32(0)
+ // Some extra data.
+ .L32(0);
+
+ 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: 4,
+ };
+ let mut locations = loclists
+ .locations(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+ .unwrap();
+
+ // A normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0101_0200,
+ end: 0x0101_0300,
+ },
+ data: Expression(EndianSlice::new(&[2, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A base address selection followed by a normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0400,
+ end: 0x0201_0500,
+ },
+ data: Expression(EndianSlice::new(&[3, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // An empty location range followed by a normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0600,
+ end: 0x0201_0600,
+ },
+ data: Expression(EndianSlice::new(&[4, 0, 0, 0], LittleEndian)),
+ }))
+ );
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0800,
+ end: 0x0201_0900,
+ },
+ data: Expression(EndianSlice::new(&[5, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location range that starts at 0.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0200_0000,
+ end: 0x0200_0001,
+ },
+ data: Expression(EndianSlice::new(&[6, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location range that ends at -1.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0000_0000,
+ end: 0xffff_ffff,
+ },
+ data: Expression(EndianSlice::new(&[7, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location list end.
+ assert_eq!(locations.next(), Ok(None));
+
+ // An offset at the end of buf.
+ 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_location_list_64() {
+ let tombstone = !0u64 - 1;
+ let start = Label::new();
+ let first = Label::new();
+ #[rustfmt::skip]
+ let section = Section::with_endian(Endian::Little)
+ // A location before the offset.
+ .mark(&start)
+ .L64(0x10000).L64(0x10100).L16(4).L32(1)
+ .mark(&first)
+ // A normal location.
+ .L64(0x10200).L64(0x10300).L16(4).L32(2)
+ // A base address selection followed by a normal location.
+ .L64(0xffff_ffff_ffff_ffff).L64(0x0200_0000)
+ .L64(0x10400).L64(0x10500).L16(4).L32(3)
+ // An empty location range followed by a normal location.
+ .L64(0x10600).L64(0x10600).L16(4).L32(4)
+ .L64(0x10800).L64(0x10900).L16(4).L32(5)
+ // A location range that starts at 0.
+ .L64(0).L64(1).L16(4).L32(6)
+ // A location range that ends at -1.
+ .L64(0xffff_ffff_ffff_ffff).L64(0x0000_0000)
+ .L64(0).L64(0xffff_ffff_ffff_ffff).L16(4).L32(7)
+ // A normal location with tombstone.
+ .L64(tombstone).L64(tombstone).L16(4).L32(8)
+ // A base address selection with tombstone followed by a normal location.
+ .L64(0xffff_ffff_ffff_ffff).L64(tombstone)
+ .L64(0x10a00).L64(0x10b00).L16(4).L32(9)
+ // A location list end.
+ .L64(0).L64(0)
+ // Some extra data.
+ .L64(0);
+
+ 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::Dwarf64,
+ version: 4,
+ address_size: 8,
+ };
+ let mut locations = loclists
+ .locations(offset, encoding, 0x0100_0000, debug_addr, debug_addr_base)
+ .unwrap();
+
+ // A normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0101_0200,
+ end: 0x0101_0300,
+ },
+ data: Expression(EndianSlice::new(&[2, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A base address selection followed by a normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0400,
+ end: 0x0201_0500,
+ },
+ data: Expression(EndianSlice::new(&[3, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // An empty location range followed by a normal location.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0600,
+ end: 0x0201_0600,
+ },
+ data: Expression(EndianSlice::new(&[4, 0, 0, 0], LittleEndian)),
+ }))
+ );
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0201_0800,
+ end: 0x0201_0900,
+ },
+ data: Expression(EndianSlice::new(&[5, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location range that starts at 0.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0200_0000,
+ end: 0x0200_0001,
+ },
+ data: Expression(EndianSlice::new(&[6, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location range that ends at -1.
+ assert_eq!(
+ locations.next(),
+ Ok(Some(LocationListEntry {
+ range: Range {
+ begin: 0x0,
+ end: 0xffff_ffff_ffff_ffff,
+ },
+ data: Expression(EndianSlice::new(&[7, 0, 0, 0], LittleEndian)),
+ }))
+ );
+
+ // A location list end.
+ assert_eq!(locations.next(), Ok(None));
+
+ // An offset at the end of buf.
+ 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)
+ // An invalid location range.
+ .L32(0x20000).L32(0x10000).L16(4).L32(1)
+ // An invalid range after wrapping.
+ .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,
+ };
+
+ // An invalid location range.
+ let mut locations = loclists
+ .locations(
+ LocationListsOffset(0x0),
+ encoding,
+ 0x0100_0000,
+ debug_addr,
+ debug_addr_base,
+ )
+ .unwrap();
+ assert_eq!(locations.next(), Err(Error::InvalidLocationAddressRange));
+
+ // An invalid location range after wrapping.
+ let mut locations = loclists
+ .locations(
+ LocationListsOffset(14),
+ encoding,
+ 0x0100_0000,
+ debug_addr,
+ debug_addr_base,
+ )
+ .unwrap();
+ assert_eq!(locations.next(), Err(Error::InvalidLocationAddressRange));
+
+ // An invalid offset.
+ 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 vec![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(&section, 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, // DW_LLE_startx_length
+ 0x00, // ULEB encoded b7
+ 0x08, 0x00, 0x00, 0x00, // Fixed 4 byte length of 8
+ 0x03, 0x00, // Fixed two byte length of the location
+ 0x11, 0x00, // DW_OP_constu 0
+ 0x9f, // DW_OP_stack_value
+ // Padding data
+ //0x99, 0x99, 0x99, 0x99
+ ];
+ 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,
+ };
+
+ // An invalid location range.
+ 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),
+ }))
+ );
+ }
+}
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