//! Read DWARF debugging information. //! //! * [Example Usage](#example-usage) //! * [API Structure](#api-structure) //! * [Using with `FallibleIterator`](#using-with-fallibleiterator) //! //! ## Example Usage //! //! Print out all of the functions in the debuggee program: //! //! ```rust,no_run //! # fn example() -> Result<(), gimli::Error> { //! # type R = gimli::EndianSlice<'static, gimli::LittleEndian>; //! # let get_file_section_reader = |name| -> Result { unimplemented!() }; //! # let get_sup_file_section_reader = |name| -> Result { unimplemented!() }; //! // Read the DWARF sections with whatever object loader you're using. //! // These closures should return a `Reader` instance (e.g. `EndianSlice`). //! let loader = |section: gimli::SectionId| { get_file_section_reader(section.name()) }; //! let sup_loader = |section: gimli::SectionId| { get_sup_file_section_reader(section.name()) }; //! let mut dwarf = gimli::Dwarf::load(loader)?; //! dwarf.load_sup(sup_loader)?; //! //! // Iterate over all compilation units. //! let mut iter = dwarf.units(); //! while let Some(header) = iter.next()? { //! // Parse the abbreviations and other information for this compilation unit. //! let unit = dwarf.unit(header)?; //! //! // Iterate over all of this compilation unit's entries. //! let mut entries = unit.entries(); //! while let Some((_, entry)) = entries.next_dfs()? { //! // If we find an entry for a function, print it. //! if entry.tag() == gimli::DW_TAG_subprogram { //! println!("Found a function: {:?}", entry); //! } //! } //! } //! # unreachable!() //! # } //! ``` //! //! Full example programs: //! //! * [A simple parser](https://github.com/gimli-rs/gimli/blob/master/crates/examples/src/bin/simple.rs) //! //! * [A `dwarfdump` //! clone](https://github.com/gimli-rs/gimli/blob/master/crates/examples/src/bin/dwarfdump.rs) //! //! * [An `addr2line` clone](https://github.com/gimli-rs/addr2line) //! //! * [`ddbug`](https://github.com/gimli-rs/ddbug), a utility giving insight into //! code generation by making debugging information readable //! //! * [`dwprod`](https://github.com/fitzgen/dwprod), a tiny utility to list the //! compilers used to create each compilation unit within a shared library or //! executable (via `DW_AT_producer`) //! //! * [`dwarf-validate`](https://github.com/gimli-rs/gimli/blob/master/crates/examples/src/bin/dwarf-validate.rs), //! a program to validate the integrity of some DWARF and its references //! between sections and compilation units. //! //! ## API Structure //! //! * Basic familiarity with DWARF is assumed. //! //! * The [`Dwarf`](./struct.Dwarf.html) type contains the commonly used DWARF //! sections. It has methods that simplify access to debugging data that spans //! multiple sections. Use of this type is optional, but recommended. //! //! * Each section gets its own type. Consider these types the entry points to //! the library: //! //! * [`DebugAbbrev`](./struct.DebugAbbrev.html): The `.debug_abbrev` section. //! //! * [`DebugAddr`](./struct.DebugAddr.html): The `.debug_addr` section. //! //! * [`DebugAranges`](./struct.DebugAranges.html): The `.debug_aranges` //! section. //! //! * [`DebugFrame`](./struct.DebugFrame.html): The `.debug_frame` section. //! //! * [`DebugInfo`](./struct.DebugInfo.html): The `.debug_info` section. //! //! * [`DebugLine`](./struct.DebugLine.html): The `.debug_line` section. //! //! * [`DebugLineStr`](./struct.DebugLineStr.html): The `.debug_line_str` section. //! //! * [`DebugLoc`](./struct.DebugLoc.html): The `.debug_loc` section. //! //! * [`DebugLocLists`](./struct.DebugLocLists.html): The `.debug_loclists` section. //! //! * [`DebugPubNames`](./struct.DebugPubNames.html): The `.debug_pubnames` //! section. //! //! * [`DebugPubTypes`](./struct.DebugPubTypes.html): The `.debug_pubtypes` //! section. //! //! * [`DebugRanges`](./struct.DebugRanges.html): The `.debug_ranges` section. //! //! * [`DebugRngLists`](./struct.DebugRngLists.html): The `.debug_rnglists` section. //! //! * [`DebugStr`](./struct.DebugStr.html): The `.debug_str` section. //! //! * [`DebugStrOffsets`](./struct.DebugStrOffsets.html): The `.debug_str_offsets` section. //! //! * [`DebugTypes`](./struct.DebugTypes.html): The `.debug_types` section. //! //! * [`DebugCuIndex`](./struct.DebugCuIndex.html): The `.debug_cu_index` section. //! //! * [`DebugTuIndex`](./struct.DebugTuIndex.html): The `.debug_tu_index` section. //! //! * [`EhFrame`](./struct.EhFrame.html): The `.eh_frame` section. //! //! * [`EhFrameHdr`](./struct.EhFrameHdr.html): The `.eh_frame_hdr` section. //! //! * Each section type exposes methods for accessing the debugging data encoded //! in that section. For example, the [`DebugInfo`](./struct.DebugInfo.html) //! struct has the [`units`](./struct.DebugInfo.html#method.units) method for //! iterating over the compilation units defined within it. //! //! * Offsets into a section are strongly typed: an offset into `.debug_info` is //! the [`DebugInfoOffset`](./struct.DebugInfoOffset.html) type. It cannot be //! used to index into the [`DebugLine`](./struct.DebugLine.html) type because //! `DebugLine` represents the `.debug_line` section. There are similar types //! for offsets relative to a compilation unit rather than a section. //! //! ## Using with `FallibleIterator` //! //! The standard library's `Iterator` trait and related APIs do not play well //! with iterators where the `next` operation is fallible. One can make the //! `Iterator`'s associated `Item` type be a `Result`, however the //! provided methods cannot gracefully handle the case when an `Err` is //! returned. //! //! This situation led to the //! [`fallible-iterator`](https://crates.io/crates/fallible-iterator) crate's //! existence. You can read more of the rationale for its existence in its //! docs. The crate provides the helpers you have come to expect (eg `map`, //! `filter`, etc) for iterators that can fail. //! //! `gimli`'s many lazy parsing iterators are a perfect match for the //! `fallible-iterator` crate's `FallibleIterator` trait because parsing is not //! done eagerly. Parse errors later in the input might only be discovered after //! having iterated through many items. //! //! To use `gimli` iterators with `FallibleIterator`, import the crate and trait //! into your code: //! //! ``` //! # #[cfg(feature = "fallible-iterator")] //! # fn foo() { //! // Use the `FallibleIterator` trait so its methods are in scope! //! use fallible_iterator::FallibleIterator; //! use gimli::{DebugAranges, EndianSlice, LittleEndian}; //! //! fn find_sum_of_address_range_lengths(aranges: DebugAranges>) //! -> gimli::Result //! { //! // `DebugAranges::headers` returns a `FallibleIterator`! //! aranges.headers() //! // `flat_map` is provided by `FallibleIterator`! //! .flat_map(|header| Ok(header.entries())) //! // `map` is provided by `FallibleIterator`! //! .map(|arange| Ok(arange.length())) //! // `fold` is provided by `FallibleIterator`! //! .fold(0, |sum, len| Ok(sum + len)) //! } //! # } //! # fn main() {} //! ``` use core::fmt::{self, Debug}; use core::result; #[cfg(feature = "std")] use std::{error, io}; use crate::common::{Register, SectionId}; use crate::constants; mod util; pub use util::*; mod addr; pub use self::addr::*; mod cfi; pub use self::cfi::*; #[cfg(feature = "read")] mod dwarf; #[cfg(feature = "read")] pub use self::dwarf::*; mod endian_slice; pub use self::endian_slice::*; #[cfg(feature = "endian-reader")] mod endian_reader; #[cfg(feature = "endian-reader")] pub use self::endian_reader::*; mod reader; pub use self::reader::*; #[cfg(feature = "read")] mod abbrev; #[cfg(feature = "read")] pub use self::abbrev::*; mod aranges; pub use self::aranges::*; mod index; pub use self::index::*; #[cfg(feature = "read")] mod line; #[cfg(feature = "read")] pub use self::line::*; mod lists; mod loclists; pub use self::loclists::*; #[cfg(feature = "read")] mod lookup; mod op; pub use self::op::*; #[cfg(feature = "read")] mod pubnames; #[cfg(feature = "read")] pub use self::pubnames::*; #[cfg(feature = "read")] mod pubtypes; #[cfg(feature = "read")] pub use self::pubtypes::*; mod rnglists; pub use self::rnglists::*; mod str; pub use self::str::*; /// An offset into the current compilation or type unit. #[derive(Debug, Clone, Copy, PartialEq, Eq, Ord, PartialOrd, Hash)] pub struct UnitOffset(pub T); #[cfg(feature = "read")] mod unit; #[cfg(feature = "read")] pub use self::unit::*; mod value; pub use self::value::*; /// Indicates that storage should be allocated on heap. #[derive(Debug, Clone, Copy, PartialEq, Eq)] pub struct StoreOnHeap; /// `EndianBuf` has been renamed to `EndianSlice`. For ease of upgrading across /// `gimli` versions, we export this type alias. #[deprecated(note = "EndianBuf has been renamed to EndianSlice, use that instead.")] pub type EndianBuf<'input, Endian> = EndianSlice<'input, Endian>; /// An error that occurred when parsing. #[derive(Debug, Clone, Copy, PartialEq, Eq)] pub enum Error { /// An I/O error occurred while reading. Io, /// Found a PC relative pointer, but the section base is undefined. PcRelativePointerButSectionBaseIsUndefined, /// Found a `.text` relative pointer, but the `.text` base is undefined. TextRelativePointerButTextBaseIsUndefined, /// Found a data relative pointer, but the data base is undefined. DataRelativePointerButDataBaseIsUndefined, /// Found a function relative pointer in a context that does not have a /// function base. FuncRelativePointerInBadContext, /// Cannot parse a pointer with a `DW_EH_PE_omit` encoding. CannotParseOmitPointerEncoding, /// An error parsing an unsigned LEB128 value. BadUnsignedLeb128, /// An error parsing a signed LEB128 value. BadSignedLeb128, /// An abbreviation declared that its tag is zero, but zero is reserved for /// null records. AbbreviationTagZero, /// An attribute specification declared that its form is zero, but zero is /// reserved for null records. AttributeFormZero, /// The abbreviation's has-children byte was not one of /// `DW_CHILDREN_{yes,no}`. BadHasChildren, /// The specified length is impossible. BadLength, /// Found an unknown `DW_FORM_*` type. UnknownForm, /// Expected a zero, found something else. ExpectedZero, /// Found an abbreviation code that has already been used. DuplicateAbbreviationCode, /// Found a duplicate arange. DuplicateArange, /// Found an unknown reserved length value. UnknownReservedLength, /// Found an unknown DWARF version. UnknownVersion(u64), /// Found a record with an unknown abbreviation code. UnknownAbbreviation, /// Hit the end of input before it was expected. UnexpectedEof(ReaderOffsetId), /// Read a null entry before it was expected. UnexpectedNull, /// Found an unknown standard opcode. UnknownStandardOpcode(constants::DwLns), /// Found an unknown extended opcode. UnknownExtendedOpcode(constants::DwLne), /// The specified address size is not supported. UnsupportedAddressSize(u8), /// The specified offset size is not supported. UnsupportedOffsetSize(u8), /// The specified field size is not supported. UnsupportedFieldSize(u8), /// The minimum instruction length must not be zero. MinimumInstructionLengthZero, /// The maximum operations per instruction must not be zero. MaximumOperationsPerInstructionZero, /// The line range must not be zero. LineRangeZero, /// The opcode base must not be zero. OpcodeBaseZero, /// Found an invalid UTF-8 string. BadUtf8, /// Expected to find the CIE ID, but found something else. NotCieId, /// Expected to find a pointer to a CIE, but found the CIE ID instead. NotCiePointer, /// Expected to find a pointer to an FDE, but found a CIE instead. NotFdePointer, /// Invalid branch target for a DW_OP_bra or DW_OP_skip. BadBranchTarget(u64), /// DW_OP_push_object_address used but no address passed in. InvalidPushObjectAddress, /// Not enough items on the stack when evaluating an expression. NotEnoughStackItems, /// Too many iterations to compute the expression. TooManyIterations, /// An unrecognized operation was found while parsing a DWARF /// expression. InvalidExpression(constants::DwOp), /// An unsupported operation was found while evaluating a DWARF expression. UnsupportedEvaluation, /// The expression had a piece followed by an expression /// terminator without a piece. InvalidPiece, /// An expression-terminating operation was followed by something /// other than the end of the expression or a piece operation. InvalidExpressionTerminator(u64), /// Division or modulus by zero when evaluating an expression. DivisionByZero, /// An expression operation used mismatching types. TypeMismatch, /// An expression operation required an integral type but saw a /// floating point type. IntegralTypeRequired, /// An expression operation used types that are not supported. UnsupportedTypeOperation, /// The shift value in an expression must be a non-negative integer. InvalidShiftExpression, /// An unknown DW_CFA_* instruction. UnknownCallFrameInstruction(constants::DwCfa), /// The end of an address range was before the beginning. InvalidAddressRange, /// The end offset of a loc list entry was before the beginning. InvalidLocationAddressRange, /// Encountered a call frame instruction in a context in which it is not /// valid. CfiInstructionInInvalidContext, /// When evaluating call frame instructions, found a `DW_CFA_restore_state` /// stack pop instruction, but the stack was empty, and had nothing to pop. PopWithEmptyStack, /// Do not have unwind info for the given address. NoUnwindInfoForAddress, /// An offset value was larger than the maximum supported value. UnsupportedOffset, /// The given pointer encoding is either unknown or invalid. UnknownPointerEncoding, /// Did not find an entry at the given offset. NoEntryAtGivenOffset, /// The given offset is out of bounds. OffsetOutOfBounds, /// Found an unknown CFI augmentation. UnknownAugmentation, /// We do not support the given pointer encoding yet. UnsupportedPointerEncoding, /// Registers larger than `u16` are not supported. UnsupportedRegister(u64), /// The CFI program defined more register rules than we have storage for. TooManyRegisterRules, /// Attempted to push onto the CFI or evaluation stack, but it was already /// at full capacity. StackFull, /// The `.eh_frame_hdr` binary search table claims to be variable-length encoded, /// which makes binary search impossible. VariableLengthSearchTable, /// The `DW_UT_*` value for this unit is not supported yet. UnsupportedUnitType, /// Ranges using AddressIndex are not supported yet. UnsupportedAddressIndex, /// Nonzero segment selector sizes aren't supported yet. UnsupportedSegmentSize, /// A compilation unit or type unit is missing its top level DIE. MissingUnitDie, /// A DIE attribute used an unsupported form. UnsupportedAttributeForm, /// Missing DW_LNCT_path in file entry format. MissingFileEntryFormatPath, /// Expected an attribute value to be a string form. ExpectedStringAttributeValue, /// `DW_FORM_implicit_const` used in an invalid context. InvalidImplicitConst, /// Invalid section count in `.dwp` index. InvalidIndexSectionCount, /// Invalid slot count in `.dwp` index. InvalidIndexSlotCount, /// Invalid hash row in `.dwp` index. InvalidIndexRow, /// Unknown section type in `.dwp` index. UnknownIndexSection, } impl fmt::Display for Error { #[inline] fn fmt(&self, f: &mut fmt::Formatter) -> ::core::result::Result<(), fmt::Error> { write!(f, "{}", self.description()) } } impl Error { /// A short description of the error. pub fn description(&self) -> &str { match *self { Error::Io => "An I/O error occurred while reading.", Error::PcRelativePointerButSectionBaseIsUndefined => { "Found a PC relative pointer, but the section base is undefined." } Error::TextRelativePointerButTextBaseIsUndefined => { "Found a `.text` relative pointer, but the `.text` base is undefined." } Error::DataRelativePointerButDataBaseIsUndefined => { "Found a data relative pointer, but the data base is undefined." } Error::FuncRelativePointerInBadContext => { "Found a function relative pointer in a context that does not have a function base." } Error::CannotParseOmitPointerEncoding => { "Cannot parse a pointer with a `DW_EH_PE_omit` encoding." } Error::BadUnsignedLeb128 => "An error parsing an unsigned LEB128 value", Error::BadSignedLeb128 => "An error parsing a signed LEB128 value", Error::AbbreviationTagZero => { "An abbreviation declared that its tag is zero, but zero is reserved for null records" } Error::AttributeFormZero => { "An attribute specification declared that its form is zero, but zero is reserved for null records" } Error::BadHasChildren => { "The abbreviation's has-children byte was not one of `DW_CHILDREN_{yes,no}`" } Error::BadLength => "The specified length is impossible", Error::UnknownForm => "Found an unknown `DW_FORM_*` type", Error::ExpectedZero => "Expected a zero, found something else", Error::DuplicateAbbreviationCode => { "Found an abbreviation code that has already been used" } Error::DuplicateArange => "Found a duplicate arange", Error::UnknownReservedLength => "Found an unknown reserved length value", Error::UnknownVersion(_) => "Found an unknown DWARF version", Error::UnknownAbbreviation => "Found a record with an unknown abbreviation code", Error::UnexpectedEof(_) => "Hit the end of input before it was expected", Error::UnexpectedNull => "Read a null entry before it was expected.", Error::UnknownStandardOpcode(_) => "Found an unknown standard opcode", Error::UnknownExtendedOpcode(_) => "Found an unknown extended opcode", Error::UnsupportedAddressSize(_) => "The specified address size is not supported", Error::UnsupportedOffsetSize(_) => "The specified offset size is not supported", Error::UnsupportedFieldSize(_) => "The specified field size is not supported", Error::MinimumInstructionLengthZero => { "The minimum instruction length must not be zero." } Error::MaximumOperationsPerInstructionZero => { "The maximum operations per instruction must not be zero." } Error::LineRangeZero => "The line range must not be zero.", Error::OpcodeBaseZero => "The opcode base must not be zero.", Error::BadUtf8 => "Found an invalid UTF-8 string.", Error::NotCieId => "Expected to find the CIE ID, but found something else.", Error::NotCiePointer => "Expected to find a CIE pointer, but found the CIE ID instead.", Error::NotFdePointer => { "Expected to find an FDE pointer, but found a CIE pointer instead." } Error::BadBranchTarget(_) => "Invalid branch target in DWARF expression", Error::InvalidPushObjectAddress => { "DW_OP_push_object_address used but no object address given" } Error::NotEnoughStackItems => "Not enough items on stack when evaluating expression", Error::TooManyIterations => "Too many iterations to evaluate DWARF expression", Error::InvalidExpression(_) => "Invalid opcode in DWARF expression", Error::UnsupportedEvaluation => "Unsupported operation when evaluating expression", Error::InvalidPiece => { "DWARF expression has piece followed by non-piece expression at end" } Error::InvalidExpressionTerminator(_) => "Expected DW_OP_piece or DW_OP_bit_piece", Error::DivisionByZero => "Division or modulus by zero when evaluating expression", Error::TypeMismatch => "Type mismatch when evaluating expression", Error::IntegralTypeRequired => "Integral type expected when evaluating expression", Error::UnsupportedTypeOperation => { "An expression operation used types that are not supported" } Error::InvalidShiftExpression => { "The shift value in an expression must be a non-negative integer." } Error::UnknownCallFrameInstruction(_) => "An unknown DW_CFA_* instructiion", Error::InvalidAddressRange => { "The end of an address range must not be before the beginning." } Error::InvalidLocationAddressRange => { "The end offset of a location list entry must not be before the beginning." } Error::CfiInstructionInInvalidContext => { "Encountered a call frame instruction in a context in which it is not valid." } Error::PopWithEmptyStack => { "When evaluating call frame instructions, found a `DW_CFA_restore_state` stack pop \ instruction, but the stack was empty, and had nothing to pop." } Error::NoUnwindInfoForAddress => "Do not have unwind info for the given address.", Error::UnsupportedOffset => { "An offset value was larger than the maximum supported value." } Error::UnknownPointerEncoding => { "The given pointer encoding is either unknown or invalid." } Error::NoEntryAtGivenOffset => "Did not find an entry at the given offset.", Error::OffsetOutOfBounds => "The given offset is out of bounds.", Error::UnknownAugmentation => "Found an unknown CFI augmentation.", Error::UnsupportedPointerEncoding => { "We do not support the given pointer encoding yet." } Error::UnsupportedRegister(_) => "Registers larger than `u16` are not supported.", Error::TooManyRegisterRules => { "The CFI program defined more register rules than we have storage for." } Error::StackFull => { "Attempted to push onto the CFI stack, but it was already at full capacity." } Error::VariableLengthSearchTable => { "The `.eh_frame_hdr` binary search table claims to be variable-length encoded, \ which makes binary search impossible." } Error::UnsupportedUnitType => "The `DW_UT_*` value for this unit is not supported yet", Error::UnsupportedAddressIndex => "Ranges involving AddressIndex are not supported yet", Error::UnsupportedSegmentSize => "Nonzero segment size not supported yet", Error::MissingUnitDie => { "A compilation unit or type unit is missing its top level DIE." } Error::UnsupportedAttributeForm => "A DIE attribute used an unsupported form.", Error::MissingFileEntryFormatPath => "Missing DW_LNCT_path in file entry format.", Error::ExpectedStringAttributeValue => { "Expected an attribute value to be a string form." } Error::InvalidImplicitConst => "DW_FORM_implicit_const used in an invalid context.", Error::InvalidIndexSectionCount => "Invalid section count in `.dwp` index.", Error::InvalidIndexSlotCount => "Invalid slot count in `.dwp` index.", Error::InvalidIndexRow => "Invalid hash row in `.dwp` index.", Error::UnknownIndexSection => "Unknown section type in `.dwp` index.", } } } #[cfg(feature = "std")] impl error::Error for Error {} #[cfg(feature = "std")] impl From for Error { fn from(_: io::Error) -> Self { Error::Io } } /// The result of a parse. pub type Result = result::Result; /// A convenience trait for loading DWARF sections from object files. To be /// used like: /// /// ``` /// use gimli::{DebugInfo, EndianSlice, LittleEndian, Reader, Section}; /// /// let buf = [0x00, 0x01, 0x02, 0x03]; /// let reader = EndianSlice::new(&buf, LittleEndian); /// let loader = |name| -> Result<_, ()> { Ok(reader) }; /// /// let debug_info: DebugInfo<_> = Section::load(loader).unwrap(); /// ``` pub trait Section: From { /// Returns the section id for this type. fn id() -> SectionId; /// Returns the ELF section name for this type. fn section_name() -> &'static str { Self::id().name() } /// Returns the ELF section name (if any) for this type when used in a dwo /// file. fn dwo_section_name() -> Option<&'static str> { Self::id().dwo_name() } /// Returns the XCOFF section name (if any) for this type when used in a XCOFF /// file. fn xcoff_section_name() -> Option<&'static str> { Self::id().xcoff_name() } /// Try to load the section using the given loader function. fn load(f: F) -> core::result::Result where F: FnOnce(SectionId) -> core::result::Result, { f(Self::id()).map(From::from) } /// Returns the `Reader` for this section. fn reader(&self) -> &R where R: Reader; /// Returns the subrange of the section that is the contribution of /// a unit in a `.dwp` file. fn dwp_range(&self, offset: u32, size: u32) -> Result where R: Reader, { let mut data = self.reader().clone(); data.skip(R::Offset::from_u32(offset))?; data.truncate(R::Offset::from_u32(size))?; Ok(data.into()) } /// Returns the `Reader` for this section. fn lookup_offset_id(&self, id: ReaderOffsetId) -> Option<(SectionId, R::Offset)> where R: Reader, { self.reader() .lookup_offset_id(id) .map(|offset| (Self::id(), offset)) } } impl Register { pub(crate) fn from_u64(x: u64) -> Result { let y = x as u16; if u64::from(y) == x { Ok(Register(y)) } else { Err(Error::UnsupportedRegister(x)) } } } #[cfg(test)] mod tests { use super::*; use crate::common::Format; use crate::endianity::LittleEndian; use test_assembler::{Endian, Section}; #[test] fn test_parse_initial_length_32_ok() { let section = Section::with_endian(Endian::Little).L32(0x7856_3412); let buf = section.get_contents().unwrap(); let input = &mut EndianSlice::new(&buf, LittleEndian); match input.read_initial_length() { Ok((length, format)) => { assert_eq!(input.len(), 0); assert_eq!(format, Format::Dwarf32); assert_eq!(0x7856_3412, length); } otherwise => panic!("Unexpected result: {:?}", otherwise), } } #[test] fn test_parse_initial_length_64_ok() { let section = Section::with_endian(Endian::Little) // Dwarf_64_INITIAL_UNIT_LENGTH .L32(0xffff_ffff) // Actual length .L64(0xffde_bc9a_7856_3412); let buf = section.get_contents().unwrap(); let input = &mut EndianSlice::new(&buf, LittleEndian); #[cfg(target_pointer_width = "64")] match input.read_initial_length() { Ok((length, format)) => { assert_eq!(input.len(), 0); assert_eq!(format, Format::Dwarf64); assert_eq!(0xffde_bc9a_7856_3412, length); } otherwise => panic!("Unexpected result: {:?}", otherwise), } #[cfg(target_pointer_width = "32")] match input.read_initial_length() { Err(Error::UnsupportedOffset) => {} otherwise => panic!("Unexpected result: {:?}", otherwise), }; } #[test] fn test_parse_initial_length_unknown_reserved_value() { let section = Section::with_endian(Endian::Little).L32(0xffff_fffe); let buf = section.get_contents().unwrap(); let input = &mut EndianSlice::new(&buf, LittleEndian); match input.read_initial_length() { Err(Error::UnknownReservedLength) => assert!(true), otherwise => panic!("Unexpected result: {:?}", otherwise), }; } #[test] fn test_parse_initial_length_incomplete() { let buf = [0xff, 0xff, 0xff]; // Need at least 4 bytes. let input = &mut EndianSlice::new(&buf, LittleEndian); match input.read_initial_length() { Err(Error::UnexpectedEof(_)) => assert!(true), otherwise => panic!("Unexpected result: {:?}", otherwise), }; } #[test] fn test_parse_initial_length_64_incomplete() { let section = Section::with_endian(Endian::Little) // Dwarf_64_INITIAL_UNIT_LENGTH .L32(0xffff_ffff) // Actual length is not long enough. .L32(0x7856_3412); let buf = section.get_contents().unwrap(); let input = &mut EndianSlice::new(&buf, LittleEndian); match input.read_initial_length() { Err(Error::UnexpectedEof(_)) => assert!(true), otherwise => panic!("Unexpected result: {:?}", otherwise), }; } #[test] fn test_parse_offset_32() { let section = Section::with_endian(Endian::Little).L32(0x0123_4567); let buf = section.get_contents().unwrap(); let input = &mut EndianSlice::new(&buf, LittleEndian); match input.read_offset(Format::Dwarf32) { Ok(val) => { assert_eq!(input.len(), 0); assert_eq!(val, 0x0123_4567); } otherwise => panic!("Unexpected result: {:?}", otherwise), }; } #[test] fn test_parse_offset_64_small() { let section = Section::with_endian(Endian::Little).L64(0x0123_4567); let buf = section.get_contents().unwrap(); let input = &mut EndianSlice::new(&buf, LittleEndian); match input.read_offset(Format::Dwarf64) { Ok(val) => { assert_eq!(input.len(), 0); assert_eq!(val, 0x0123_4567); } otherwise => panic!("Unexpected result: {:?}", otherwise), }; } #[test] #[cfg(target_pointer_width = "64")] fn test_parse_offset_64_large() { let section = Section::with_endian(Endian::Little).L64(0x0123_4567_89ab_cdef); let buf = section.get_contents().unwrap(); let input = &mut EndianSlice::new(&buf, LittleEndian); match input.read_offset(Format::Dwarf64) { Ok(val) => { assert_eq!(input.len(), 0); assert_eq!(val, 0x0123_4567_89ab_cdef); } otherwise => panic!("Unexpected result: {:?}", otherwise), }; } #[test] #[cfg(target_pointer_width = "32")] fn test_parse_offset_64_large() { let section = Section::with_endian(Endian::Little).L64(0x0123_4567_89ab_cdef); let buf = section.get_contents().unwrap(); let input = &mut EndianSlice::new(&buf, LittleEndian); match input.read_offset(Format::Dwarf64) { Err(Error::UnsupportedOffset) => assert!(true), otherwise => panic!("Unexpected result: {:?}", otherwise), }; } }