bjoernager/rust
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Move try_print_query_stack to rustc_interface.

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This commit is contained in:
Camille GILLOT 2020-04-08 20:47:36 +02:00
parent 0e9cac40a6
commit 4dbf83a209
4 changed files with 60 additions and 52 deletions
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23
compiler/rustc_interface/src/interface.rs
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@ -8,7 +8,7 @@ use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::sync::Lrc;
use rustc_data_structures::OnDrop;
use rustc_errors::registry::Registry;
use rustc_errors::ErrorReported;
use rustc_errors::{ErrorReported, Handler};
use rustc_lint::LintStore;
use rustc_middle::ty;
use rustc_parse::new_parser_from_source_str;
@ -213,3 +213,24 @@ pub fn run_compiler<R: Send>(mut config: Config, f: impl FnOnce(&Compiler) -> R
|| create_compiler_and_run(config, f),
)
}
pub fn try_print_query_stack(handler: &Handler, num_frames: Option<usize>) {
eprintln!("query stack during panic:");
// 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 i = ty::tls::with_context_opt(|icx| {
if let Some(icx) = icx {
icx.tcx.queries.try_print_query_stack(icx.tcx, icx.query, handler, num_frames)
} else {
0
}
});
if num_frames == None || num_frames >= Some(i) {
eprintln!("end of query stack");
} else {
eprintln!("we're just showing a limited slice of the query stack");
}
}