bjoernager/rust
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Add Frames iterator for Backtrace

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This commit is contained in:
Sean Chen 2021-01-13 17:54:24 -06:00
parent a62a76047e
commit 050643a960
2 changed files with 92 additions and 38 deletions
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21
library/std/src/backtrace.rs
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@ -147,11 +147,14 @@ fn _assert_send_sync() {
_assert::<Backtrace>();
}
struct BacktraceFrame {
/// A single frame of a backtrace.
#[unstable(feature = "backtrace_frames", issue = "79676")]
pub struct BacktraceFrame {
frame: RawFrame,
symbols: Vec<BacktraceSymbol>,
}
#[derive(Debug)]
enum RawFrame {
Actual(backtrace_rs::Frame),
#[cfg(test)]
@ -196,6 +199,14 @@ impl fmt::Debug for Backtrace {
}
}
impl fmt::Debug for BacktraceFrame {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
let mut dbg = fmt.debug_list();
dbg.entries(&self.symbols);
dbg.finish()
}
}
impl fmt::Debug for BacktraceSymbol {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
// FIXME: improve formatting: https://github.com/rust-lang/rust/issues/65280
@ -353,6 +364,14 @@ impl Backtrace {
}
}
impl<'a> Backtrace {
/// Returns an iterator over the backtrace frames.
#[unstable(feature = "backtrace_frames", issue = "79676")]
pub fn frames(&'a self) -> &'a [BacktraceFrame] {
if let Inner::Captured(c) = &self.inner { &c.force().frames } else { &[] }
}
}
impl fmt::Display for Backtrace {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
let capture = match &self.inner {