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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:41 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:41 +0000 |
commit | 4f9fe856a25ab29345b90e7725509e9ee38a37be (patch) | |
tree | e4ffd8a9374cae7b21f7cbfb352927e0e074aff6 /vendor/gimli-0.26.2/src/read/loclists.rs | |
parent | Adding upstream version 1.68.2+dfsg1. (diff) | |
download | rustc-upstream/1.69.0+dfsg1.tar.xz rustc-upstream/1.69.0+dfsg1.zip |
Adding upstream version 1.69.0+dfsg1.upstream/1.69.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | vendor/gimli-0.26.2/src/read/loclists.rs | 1514 |
1 files changed, 1514 insertions, 0 deletions
diff --git a/vendor/gimli-0.26.2/src/read/loclists.rs b/vendor/gimli-0.26.2/src/read/loclists.rs new file mode 100644 index 000000000..3902c181b --- /dev/null +++ b/vendor/gimli-0.26.2/src/read/loclists.rs @@ -0,0 +1,1514 @@ +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(§ion, 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>> { + match format { + LocListsFormat::Bare => { + let range = RawRange::parse(input, encoding.address_size)?; + return Ok(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 => Ok(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 (range, data) = match raw_loc { + RawLocListEntry::BaseAddress { addr } => { + self.base_address = addr; + continue; + } + RawLocListEntry::BaseAddressx { addr } => { + self.base_address = self.get_address(addr)?; + continue; + } + 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 + length; + (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 } => { + 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, + } => ( + Range { + begin, + end: begin + length, + }, + data, + ), + }; + + if range.begin > range.end { + self.raw.input.empty(); + return Err(Error::InvalidLocationAddressRange); + } + + return 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 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); + 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) + // A range end. + .L8(0) + // Some extra data. + .L32(0xffff_ffff); + size.set_const((§ion.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 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 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); + 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) + // A range end. + .L8(0) + // Some extra data. + .L32(0xffff_ffff); + size.set_const((§ion.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 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 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 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 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 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(§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, // 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), + })) + ); + } +} |