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use std::borrow::Cow;
use std::fmt;
use failure::{Backtrace, Context, Fail};
use gimli;
use symbolic_debuginfo::ObjectError;
#[derive(Debug, Fail, Clone)]
#[fail(display = "{}", _0)]
pub(crate) struct ConversionError(pub Cow<'static, str>);
impl ConversionError {
pub fn new<C>(message: C) -> Self
where
C: Into<Cow<'static, str>>,
{
ConversionError(message.into())
}
}
#[doc(hidden)]
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
pub enum ValueKind {
Symbol,
Function,
File,
Line,
ParentOffset,
Language,
}
impl fmt::Display for ValueKind {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
ValueKind::Symbol => write!(f, "symbol"),
ValueKind::Function => write!(f, "function"),
ValueKind::File => write!(f, "file"),
ValueKind::Line => write!(f, "line record"),
ValueKind::ParentOffset => write!(f, "inline parent offset"),
ValueKind::Language => write!(f, "language"),
}
}
}
#[derive(Debug, Fail, Copy, Clone, Eq, PartialEq)]
pub enum SymCacheErrorKind {
#[fail(display = "bad symcache magic")]
BadFileMagic,
#[fail(display = "invalid symcache header")]
BadFileHeader,
#[fail(display = "cannot read symcache segment")]
BadSegment,
#[fail(display = "malformed symcache file")]
BadCacheFile,
#[fail(display = "unsupported symcache version")]
UnsupportedVersion,
#[fail(display = "malformed debug info file")]
BadDebugFile,
#[fail(display = "missing debug section")]
MissingDebugSection,
#[fail(display = "no debug information found in file")]
MissingDebugInfo,
#[fail(display = "unsupported debug information")]
UnsupportedDebugKind,
#[fail(display = "{} too large for symcache file format", _0)]
ValueTooLarge(ValueKind),
#[fail(display = "too many {}s for symcache", _0)]
TooManyValues(ValueKind),
#[fail(display = "failed to write symcache")]
WriteFailed,
}
#[derive(Debug)]
pub struct SymCacheError {
inner: Context<SymCacheErrorKind>,
}
impl Fail for SymCacheError {
fn cause(&self) -> Option<&Fail> {
self.inner.cause()
}
fn backtrace(&self) -> Option<&Backtrace> {
self.inner.backtrace()
}
}
impl fmt::Display for SymCacheError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(&self.inner, f)
}
}
impl SymCacheError {
pub fn kind(&self) -> SymCacheErrorKind {
*self.inner.get_context()
}
}
impl From<SymCacheErrorKind> for SymCacheError {
fn from(kind: SymCacheErrorKind) -> SymCacheError {
SymCacheError {
inner: Context::new(kind),
}
}
}
impl From<Context<SymCacheErrorKind>> for SymCacheError {
fn from(inner: Context<SymCacheErrorKind>) -> SymCacheError {
SymCacheError { inner }
}
}
impl From<ObjectError> for SymCacheError {
fn from(error: ObjectError) -> SymCacheError {
error.context(SymCacheErrorKind::BadDebugFile).into()
}
}
impl From<gimli::Error> for SymCacheError {
fn from(error: gimli::Error) -> SymCacheError {
error.context(SymCacheErrorKind::BadDebugFile).into()
}
}
impl From<ConversionError> for SymCacheError {
fn from(error: ConversionError) -> SymCacheError {
error.context(SymCacheErrorKind::BadDebugFile).into()
}
}