[browser][MT] handle exceptions

src/mono/browser/runtime/exports-binding.ts

@@ -32,6 +32,7 @@ import {
     mono_wasm_pthread_on_pthread_registered, mono_wasm_pthread_set_name, mono_wasm_install_js_worker_interop, mono_wasm_uninstall_js_worker_interop, mono_wasm_start_io_thread_async
 } from "./pthreads";
 import { mono_wasm_dump_threads } from "./pthreads/ui-thread";
+import { loaderHelpers } from "./globals";
 import { mono_wasm_schedule_synchronization_context } from "./pthreads/shared";
 
 
@@ -147,7 +148,23 @@ export function replace_linker_placeholders (imports: WebAssembly.Imports) {
         }
     }
 
-    for (const [idx, realFn] of wasmImports.entries()) {
+    for (const [idx, rfn] of wasmImports.entries()) {
+        let realFn = rfn;
+        if (WasmEnableThreads) {
+            realFn = function catch_and_log_exceptions (...args: any[]) {
+                try {
+                    return rfn(...args);
+                } catch (ex: any) {
+                    if (ex == "unwind") {
+                        throw ex;
+                    }
+                    if (ex && !ex.silent) {
+                        loaderHelpers.mono_exit(1, ex);
+                    }
+                }
+            };
+        }
+
         const shortName = indexToNameMap[idx];
         // if it's not found it means the emcc linker didn't include it, which is fine
         if (shortName !== undefined) {

src/mono/browser/runtime/managed-exports.ts

@@ -14,7 +14,7 @@ import { assert_c_interop, assert_js_interop } from "./invoke-js";
 import { monoThreadInfo, mono_wasm_main_thread_ptr } from "./pthreads";
 import { _zero_region, copyBytes } from "./memory";
 import { stringToUTF8Ptr } from "./strings";
-import { mono_log_debug } from "./logging";
+import { mono_log_error } from "./logging";
 
 const managedExports: ManagedExports = {} as any;
 
@@ -254,7 +254,7 @@ export function install_main_synchronization_context (jsThreadBlockingMode: numb
         }
         return get_arg_gc_handle(res) as any;
     } catch (e) {
-        mono_log_debug("install_main_synchronization_context failed", e);
+        mono_log_error("install_main_synchronization_context failed", e);
         throw e;
     }
 }