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Don't panic in the coordinator thread, bubble up the failure #45111

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Oct 9, 2017
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Don't panic in the coordinator thread, bubble up the failure #45111

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16 changes: 10 additions & 6 deletions src/librustc_trans/back/write.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1192,7 +1192,7 @@ fn start_executing_work(tcx: TyCtxt,
modules_config: Arc<ModuleConfig>,
metadata_config: Arc<ModuleConfig>,
allocator_config: Arc<ModuleConfig>)
-> thread::JoinHandle<CompiledModules> {
-> thread::JoinHandle<Result<CompiledModules, ()>> {
let coordinator_send = tcx.tx_to_llvm_workers.clone();
let mut exported_symbols = FxHashMap();
exported_symbols.insert(LOCAL_CRATE, tcx.exported_symbols(LOCAL_CRATE));
Expand Down Expand Up @@ -1638,7 +1638,7 @@ fn start_executing_work(tcx: TyCtxt,
Message::Done { result: Err(()), worker_id: _ } => {
shared_emitter.fatal("aborting due to worker thread failure");
// Exit the coordinator thread
panic!("aborting due to worker thread failure")
return Err(())
}
Message::TranslateItem => {
bug!("the coordinator should not receive translation requests")
Expand All @@ -1664,11 +1664,11 @@ fn start_executing_work(tcx: TyCtxt,
let compiled_metadata_module = compiled_metadata_module
.expect("Metadata module not compiled?");

CompiledModules {
Ok(CompiledModules {
modules: compiled_modules,
metadata_module: compiled_metadata_module,
allocator_module: compiled_allocator_module,
}
})
});

// A heuristic that determines if we have enough LLVM WorkItems in the
Expand Down Expand Up @@ -1960,15 +1960,19 @@ pub struct OngoingCrateTranslation {
coordinator_send: Sender<Box<Any + Send>>,
trans_worker_receive: Receiver<Message>,
shared_emitter_main: SharedEmitterMain,
future: thread::JoinHandle<CompiledModules>,
future: thread::JoinHandle<Result<CompiledModules, ()>>,
output_filenames: Arc<OutputFilenames>,
}

impl OngoingCrateTranslation {
pub fn join(self, sess: &Session, dep_graph: &DepGraph) -> CrateTranslation {
self.shared_emitter_main.check(sess, true);
let compiled_modules = match self.future.join() {
Ok(compiled_modules) => compiled_modules,
Ok(Ok(compiled_modules)) => compiled_modules,
Ok(Err(())) => {
sess.abort_if_errors();
panic!("expected abort due to worker thread errors")
},
Err(_) => {
sess.fatal("Error during translation/LLVM phase.");
}
Expand Down