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|
use super::*;
use crate::panic::{RefUnwindSafe, UnwindSafe};
fn generate_fake_frames() -> Vec<BacktraceFrame> {
vec![
BacktraceFrame {
frame: RawFrame::Fake,
symbols: vec![BacktraceSymbol {
name: Some(b"std::backtrace::Backtrace::create".to_vec()),
filename: Some(BytesOrWide::Bytes(b"rust/backtrace.rs".to_vec())),
lineno: Some(100),
colno: None,
}],
},
BacktraceFrame {
frame: RawFrame::Fake,
symbols: vec![BacktraceSymbol {
name: Some(b"__rust_maybe_catch_panic".to_vec()),
filename: None,
lineno: None,
colno: None,
}],
},
BacktraceFrame {
frame: RawFrame::Fake,
symbols: vec![
BacktraceSymbol {
name: Some(b"std::rt::lang_start_internal".to_vec()),
filename: Some(BytesOrWide::Bytes(b"rust/rt.rs".to_vec())),
lineno: Some(300),
colno: Some(5),
},
BacktraceSymbol {
name: Some(b"std::rt::lang_start".to_vec()),
filename: Some(BytesOrWide::Bytes(b"rust/rt.rs".to_vec())),
lineno: Some(400),
colno: None,
},
],
},
]
}
#[test]
fn test_debug() {
let backtrace = Backtrace {
inner: Inner::Captured(LazyLock::preinit(Capture {
actual_start: 1,
frames: generate_fake_frames(),
})),
};
#[rustfmt::skip]
let expected = "Backtrace [\
\n { fn: \"__rust_maybe_catch_panic\" },\
\n { fn: \"std::rt::lang_start_internal\", file: \"rust/rt.rs\", line: 300 },\
\n { fn: \"std::rt::lang_start\", file: \"rust/rt.rs\", line: 400 },\
\n]";
assert_eq!(format!("{backtrace:#?}"), expected);
// Format the backtrace a second time, just to make sure lazily resolved state is stable
assert_eq!(format!("{backtrace:#?}"), expected);
}
#[test]
fn test_frames() {
let backtrace = Backtrace {
inner: Inner::Captured(LazyLock::preinit(Capture {
actual_start: 1,
frames: generate_fake_frames(),
})),
};
let frames = backtrace.frames();
#[rustfmt::skip]
let expected = vec![
"[
{ fn: \"std::backtrace::Backtrace::create\", file: \"rust/backtrace.rs\", line: 100 },
]",
"[
{ fn: \"__rust_maybe_catch_panic\" },
]",
"[
{ fn: \"std::rt::lang_start_internal\", file: \"rust/rt.rs\", line: 300 },
{ fn: \"std::rt::lang_start\", file: \"rust/rt.rs\", line: 400 },
]"
];
let mut iter = frames.iter().zip(expected.iter());
assert!(iter.all(|(f, e)| format!("{f:#?}") == *e));
}
#[test]
fn backtrace_unwind_safe() {
fn assert_unwind_safe<T: UnwindSafe + RefUnwindSafe>() {}
assert_unwind_safe::<Backtrace>();
}
|
