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On nightly, dump ICE backtraces to disk

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Implement rust-lang/compiler-team#578.

When an ICE is encountered on nightly releases, the new rustc panic
handler will also write the contents of the backtrace to disk. If any
`delay_span_bug`s are encountered, their backtrace is also added to the
file. The platform and rustc version will also be collected.
This commit is contained in:
Esteban Küber 2023-03-03 22:25:18 +00:00
parent 77e24f90f5
commit 8eb5843a59
30 changed files with 272 additions and 54 deletions
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45
compiler/rustc_query_system/src/query/job.rs
View file

@ -13,6 +13,7 @@ use rustc_session::Session;
use rustc_span::Span;
use std::hash::Hash;
use std::io::Write;
use std::num::NonZeroU64;
#[cfg(parallel_compiler)]
@ -617,30 +618,50 @@ pub fn print_query_stack<Qcx: QueryContext>(
mut current_query: Option<QueryJobId>,
handler: &Handler,
num_frames: Option<usize>,
mut file: Option<std::fs::File>,
) -> usize {
// Be careful relying on global state here: this code is called from
// a panic hook, which means that the global `Handler` may be in a weird
// state if it was responsible for triggering the panic.
let mut i = 0;
let mut count_printed = 0;
let mut count_total = 0;
let query_map = qcx.try_collect_active_jobs();
if let Some(ref mut file) = file {
let _ = writeln!(file, "\n\nquery stack during panic:");
}
while let Some(query) = current_query {
if Some(i) == num_frames {
break;
}
let Some(query_info) = query_map.as_ref().and_then(|map| map.get(&query)) else {
break;
};
let mut diag = Diagnostic::new(
Level::FailureNote,
format!("#{} [{:?}] {}", i, query_info.query.dep_kind, query_info.query.description),
);
diag.span = query_info.job.span.into();
handler.force_print_diagnostic(diag);
if Some(count_printed) < num_frames || num_frames.is_none() {
// Only print to stderr as many stack frames as `num_frames` when present.
let mut diag = Diagnostic::new(
Level::FailureNote,
format!(
"#{} [{:?}] {}",
count_printed, query_info.query.dep_kind, query_info.query.description
),
);
diag.span = query_info.job.span.into();
handler.force_print_diagnostic(diag);
count_printed += 1;
}
if let Some(ref mut file) = file {
let _ = writeln!(
file,
"#{} [{:?}] {}",
count_total, query_info.query.dep_kind, query_info.query.description
);
}
current_query = query_info.job.parent;
i += 1;
count_total += 1;
}
i
if let Some(ref mut file) = file {
let _ = writeln!(file, "end of query stack");
}
count_printed
}