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/// The error type used in this crate.
#[derive(thiserror::Error, Debug, Clone, Copy, PartialEq, Eq)]
pub enum Error {
/// The data slice was not big enough to read the struct, or we
/// were trying to follow an invalid offset to somewhere outside
/// of the data bounds.
#[error("Read error: {0}")]
ReadError(#[from] ReadError),
/// Each page has a first_address which is supposed to match the
/// start address of its first function entry. If the two addresses
/// don't match, then the lookup will fail for addresses which fall
/// in the gap between the page start address and the page's first
/// function's start address.
#[error("The page entry's first_address didn't match the address of its first function")]
InvalidPageEntryFirstAddress,
/// The page kind was set to an unrecognized value.
#[error("Invalid page kind")]
InvalidPageKind,
/// There is only supposed to be one sentinel page, at the very end
/// of the pages list - its first_address gives the end address of
/// the unwind info address range. If a sentinel page is encountered
/// somewhere else, this error is thrown.
#[error("Unexpected sentinel page")]
UnexpectedSentinelPage,
}
/// This error indicates that the data slice was not large enough to
/// read the respective item.
#[derive(thiserror::Error, Debug, Clone, Copy, PartialEq, Eq)]
pub enum ReadError {
#[error("Could not read CompactUnwindInfoHeader")]
Header,
#[error("Could not read global opcodes")]
GlobalOpcodes,
#[error("Could not read pages")]
Pages,
#[error("Could not read RegularPage")]
RegularPage,
#[error("Could not read RegularPage functions")]
RegularPageFunctions,
#[error("Could not read CompressedPage")]
CompressedPage,
#[error("Could not read CompressedPage functions")]
CompressedPageFunctions,
#[error("Could not read local opcodes")]
LocalOpcodes,
#[error("Could not read page kind")]
PageKind,
}