dotnet · pavelsavara · Jul 15, 2023 · Jul 10, 2023 · Jul 10, 2023 · Jul 10, 2023
diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
@@ -43,6 +43,7 @@
     <ProjectExclusions Include="$(MonoProjectRoot)sample\wasm\browser-webpack\Wasm.Browser.WebPack.Sample.csproj" />
     <ProjectExclusions Include="$(MonoProjectRoot)sample\wasm\node-webpack\Wasm.Node.WebPack.Sample.csproj" />
     <ProjectExclusions Include="$(MonoProjectRoot)sample\wasm\browser-nextjs\Wasm.Browser.NextJs.Sample.csproj" />
+    <ProjectExclusions Include="$(MonoProjectRoot)sample\wasm\browser-shutdown\Wasm.Browser.Shutdown.Sample.csproj" />
 
     <!-- These tests are completely disabled on wasm -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.RegularExpressions/tests/System.Text.RegularExpressions.Generators.Tests/System.Text.RegularExpressions.Generators.Tests.csproj" />

@@ -0,0 +1,11 @@
+TOP=../../../../..
+
+include ../wasm.mk
+
+ifneq ($(AOT),)
+override MSBUILD_ARGS+=/p:RunAOTCompilation=true
+endif
+
+PROJECT_NAME=Wasm.Browser.Shutdown.Sample.csproj
+
+run: run-browser
@@ -0,0 +1,51 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Runtime.InteropServices.JavaScript;
+using System.Runtime.InteropServices;
+
+namespace Sample
+{
+    public partial class Test
+    {
+        public static int Main(string[] args)
+        {
+            return 0;
+        }
+
+        [JSExport()]
+        public static void DoNothing ()
+        {
+            Console.WriteLine("You got it, boss! Doing nothing!");
+        }
+
+        [JSExport()]
+        public static void ThrowManagedException ()
+        {
+            throw new Exception("I'll make an exception to the rules just this once... and throw one.");
+        }
+
+        [JSExport()]
+        public static void CallFailFast ()
+        {
+            System.Environment.FailFast("User requested FailFast");
+        }
+
+        [JSImport("timerTick", "main.js")]
+        public static partial void TimerTick (int i);
+
+        [JSExport()]
+        public static void StartTimer ()
+        {
+            int i = 0;
+            var timer = new System.Timers.Timer(1000);
+            timer.Elapsed += (s, e) => {
+                TimerTick(i);
+                i += 1;
+            };
+            timer.AutoReset = true;
+            timer.Enabled = true;
+        }
+    }
+}
@@ -0,0 +1,6 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <Import Project="..\DefaultBrowserSample.targets" />
+  <ItemGroup>
+    <WasmExtraFilesToDeploy Include="main.js" />
+  </ItemGroup>
+</Project>
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<!--  Licensed to the .NET Foundation under one or more agreements. -->
+<!-- The .NET Foundation licenses this file to you under the MIT license. -->
+<html>
+
+<head>
+  <title>Wasm Browser Shutdown Sample</title>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <script type='module' src="./main.js"></script>
+</head>
+
+<body>
+  <h3 id="header">Wasm Browser Shutdown Sample</h3>
+  <button id="throw-managed-exc">Throw Managed Exception</button>
+  <button id="trigger-native-assert">Trigger Native Assert</button>
+  <button id="trigger-failfast">Trigger Environment.FailFast</button>
+  <button id="call-jsexport">Call Harmless JSExport</button>
+  <button id="call-exit">Call exit</button>
+  <button id="start-timer">Start Timer</button><br>
+  Timer Value: <span id="timer-value"></span>
+</body>
+
+</html>
@@ -0,0 +1,87 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+import { dotnet, exit } from './_framework/dotnet.js'
+
+let exports = undefined,
+    setenv = undefined;
+
+window.addEventListener("load", onLoad);
+
+try {
+    const { setModuleImports, getAssemblyExports, setEnvironmentVariable, getConfig } = await dotnet
+        .withModuleConfig()
+        .withExitOnUnhandledError()
+        .withExitCodeLogging()
+        .withElementOnExit()
+        .withAssertAfterExit()
+        .withOnConfigLoaded(() => {
+            // you can test abort of the startup by opening http://localhost:8000/?throwError=true
+            const params = new URLSearchParams(location.search);
+            if (params.get("throwError") === "true") {
+                throw new Error("Error thrown from OnConfigLoaded");
+            }
+        })
+        .create();
+
+    setModuleImports("main.js", {
+        timerTick: (i) => {
+            document.querySelector("#timer-value").textContent = i;
+        },
+    });
+
+    setenv = setEnvironmentVariable;
+    const config = getConfig();
+    exports = await getAssemblyExports(config.mainAssemblyName);
+}
+catch (err) {
+    exit(2, err);
+}
+
+function onLoad() {
+    document.querySelector("#throw-managed-exc").addEventListener("click", () => {
+        try {
+            exports.Sample.Test.ThrowManagedException();
+            alert("No JS exception was thrown!");
+        } catch (exc) {
+            alert(exc);
+        }
+    });
+    document.querySelector("#trigger-failfast").addEventListener("click", () => {
+        try {
+            exports.Sample.Test.CallFailFast();
+            alert("No JS exception was thrown!");
+        } catch (exc) {
+            alert(exc);
+        }
+    });
+    document.querySelector("#start-timer").addEventListener("click", () => {
+        try {
+            exports.Sample.Test.StartTimer();
+        } catch (exc) {
+            alert(exc);
+        }
+    });
+    document.querySelector("#trigger-native-assert").addEventListener("click", () => {
+        try {
+            setenv(null, null);
+            alert("No JS exception was thrown!");
+        } catch (exc) {
+            alert(exc);
+        }
+    });
+    document.querySelector("#call-jsexport").addEventListener("click", () => {
+        try {
+            exports.Sample.Test.DoNothing();
+        } catch (exc) {
+            alert(exc);
+        }
+    });
+    document.querySelector("#call-exit").addEventListener("click", () => {
+        try {
+            exit(7, "User clicked exit");
+        } catch (exc) {
+            alert(exc);
+        }
+    });
+}
@@ -277,7 +277,7 @@ public static async Task<string> FetchBackground(string url)
                 Console.WriteLine($"smoke: FetchBackground 2 ManagedThreadId:{Thread.CurrentThread.ManagedThreadId}, SynchronizationContext: {SynchronizationContext.Current?.GetType().FullName ?? "null"}");
                 var x = JSHost.ImportAsync(fetchhelper, "../fetchhelper.js");
                 Console.WriteLine($"smoke: FetchBackground 3A ManagedThreadId:{Thread.CurrentThread.ManagedThreadId}, SynchronizationContext: {SynchronizationContext.Current?.GetType().FullName ?? "null"}");
-                // using var import = await x.ConfigureAwait(false);
+                using var import = await x;
                 Console.WriteLine($"smoke: FetchBackground 3B ManagedThreadId:{Thread.CurrentThread.ManagedThreadId}, SynchronizationContext: {SynchronizationContext.Current?.GetType().FullName ?? "null"}");
                 var r = await GlobalThisFetch(url);
                 Console.WriteLine($"smoke: FetchBackground 4 ManagedThreadId:{Thread.CurrentThread.ManagedThreadId}, SynchronizationContext: {SynchronizationContext.Current?.GetType().FullName ?? "null"}");

@@ -3,7 +3,7 @@
 
 import cwraps from "./cwraps";
 import { mono_wasm_load_icu_data } from "./icu";
-import { ENVIRONMENT_IS_SHELL, ENVIRONMENT_IS_WEB, Module, loaderHelpers, runtimeHelpers } from "./globals";
+import { ENVIRONMENT_IS_SHELL, ENVIRONMENT_IS_WEB, Module, loaderHelpers, mono_assert, runtimeHelpers } from "./globals";
 import { mono_log_info, mono_log_debug, mono_log_warn, parseSymbolMapFile } from "./logging";
 import { mono_wasm_load_bytes_into_heap } from "./memory";
 import { endMeasure, MeasuredBlock, startMeasure } from "./profiler";

@@ -2,7 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 import { _lookup_js_owned_object } from "./gc-handles";
-import { createPromiseController, loaderHelpers } from "./globals";
+import { createPromiseController, loaderHelpers, mono_assert } from "./globals";
 import { TaskCallbackHolder } from "./marshal-to-cs";
 import { ControllablePromise, GCHandle } from "./types/internal";
 

@@ -12,6 +12,7 @@ import type {
 import type { VoidPtr, CharPtrPtr, Int32Ptr, CharPtr, ManagedPointer } from "./types/emscripten";
 import { linkerDisableLegacyJsInterop, linkerEnableAotProfiler, linkerEnableBrowserProfiler, Module } from "./globals";
 import { mono_log_error } from "./logging";
+import { mono_assert } from "./globals";
 
 type SigLine = [lazyOrSkip: boolean | (() => boolean), name: string, returnType: string | null, argTypes?: string[], opts?: any];
 
@@ -76,6 +77,7 @@ const fn_signatures: SigLine[] = [
 
     //INTERNAL
     [false, "mono_wasm_exit", "void", ["number"]],
+    [false, "mono_wasm_abort", "void", []],
     [true, "mono_wasm_getenv", "number", ["string"]],
     [true, "mono_wasm_set_main_args", "void", ["number", "number"]],
     [false, "mono_wasm_enable_on_demand_gc", "void", ["number"]],
@@ -205,7 +207,8 @@ export interface t_Cwraps {
     mono_wasm_intern_string_ref(strRef: MonoStringRef): void;
 
     //INTERNAL
-    mono_wasm_exit(exit_code: number): number;
+    mono_wasm_exit(exit_code: number): void;
+    mono_wasm_abort(): void;
     mono_wasm_getenv(name: string): CharPtr;
     mono_wasm_enable_on_demand_gc(enable: number): void;
     mono_wasm_set_main_args(argc: number, argv: VoidPtr): void;

@@ -4,7 +4,7 @@
 import MonoWasmThreads from "consts:monoWasmThreads";
 
 import { diagnostics_c_functions as cwraps } from "../../cwraps";
-import { INTERNAL } from "../../globals";
+import { INTERNAL, mono_assert } from "../../globals";
 import { mono_log_info, mono_log_debug, mono_log_warn } from "../../logging";
 import { withStackAlloc, getI32 } from "../../memory";
 import { Thread, waitForThread } from "../../pthreads/browser";

@@ -11,7 +11,7 @@ import type { VoidPtr } from "../types/emscripten";
 import { getController, startDiagnosticServer } from "./browser/controller";
 import * as memory from "../memory";
 import { mono_log_warn } from "../logging";
-import { runtimeHelpers } from "../globals";
+import { mono_assert, runtimeHelpers } from "../globals";
 
 
 // called from C on the main thread

@@ -7,7 +7,7 @@ import Serializer from "../server_pthread/ipc-protocol/base-serializer";
 import { CommandSetId, EventPipeCommandId, ProcessCommandId } from "../server_pthread/ipc-protocol/types";
 import { assertNever } from "../../types/internal";
 import { pthread_self } from "../../pthreads/worker";
-import { createPromiseController } from "../../globals";
+import { createPromiseController, mono_assert } from "../../globals";
 
 
 function expectAdvertise(data: ArrayBuffer): boolean {

@@ -7,7 +7,7 @@ import monoDiagnosticsMock from "consts:monoDiagnosticsMock";
 
 import { PromiseAndController, assertNever } from "../../types/internal";
 import { pthread_self } from "../../pthreads/worker";
-import { createPromiseController } from "../../globals";
+import { createPromiseController, mono_assert } from "../../globals";
 import { diagnostics_c_functions as cwraps } from "../../cwraps";
 import { EventPipeSessionIDImpl } from "../shared/types";
 import { CharPtr } from "../../types/emscripten";

@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+import { mono_assert } from "../../../globals";
 import Serializer from "./base-serializer";
 import { CommandSetId, ServerCommandId } from "./types";
 

@@ -13,6 +13,7 @@ import {
     EventPipeCollectTracingCommandProvider,
 } from "./protocol-client-commands";
 import { createEventPipeStreamingSession } from "../shared/create-session";
+import { mono_assert } from "../../globals";
 
 /// The streaming session holds all the pieces of an event pipe streaming session that the
 ///  diagnostic server knows about: the session ID, a

@@ -63,6 +63,9 @@ declare interface EmscriptenModule {
     onAbort?: {
         (error: any): void;
     };
+    onExit?: {
+        (code: number): void;
+    };
 }
 type InstantiateWasmSuccessCallback = (instance: WebAssembly.Instance, module: WebAssembly.Module | undefined) => void;
 type InstantiateWasmCallBack = (imports: WebAssembly.Imports, successCallback: InstantiateWasmSuccessCallback) => any;

@@ -249,6 +249,8 @@ mono_wasm_add_satellite_assembly (const char *name, const char *culture, const u
 EMSCRIPTEN_KEEPALIVE void
 mono_wasm_setenv (const char *name, const char *value)
 {
+	assert (name);
+	assert (value);
 	monoeg_g_setenv (strdup (name), strdup (value), 1);
 }
 
@@ -1187,6 +1189,12 @@ mono_wasm_exit (int exit_code)
 	exit (exit_code);
 }
 
+EMSCRIPTEN_KEEPALIVE int
+mono_wasm_abort ()
+{
+	abort ();
+}
+
 EMSCRIPTEN_KEEPALIVE void
 mono_wasm_set_main_args (int argc, char* argv[])
 {

@@ -1,7 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-import { runtimeHelpers } from "./globals";
+import { loaderHelpers, runtimeHelpers } from "./globals";
 import { mono_log_warn } from "./logging";
 import { GCHandle, GCHandleNull, JSHandle, JSHandleDisposed, JSHandleNull } from "./types/internal";
 import { create_weak_ref } from "./weak-ref";
@@ -109,11 +109,15 @@ export function teardown_managed_proxy(result: any, gc_handle: GCHandle): void {
 
 export function assert_not_disposed(result: any): GCHandle {
     const gc_handle = result[js_owned_gc_handle_symbol];
-    mono_assert(gc_handle != GCHandleNull, "ObjectDisposedException");
+    mono_check(gc_handle != GCHandleNull, "ObjectDisposedException");
     return gc_handle;
 }
 
 function _js_owned_object_finalized(gc_handle: GCHandle): void {
+    if (loaderHelpers.is_exited()) {
+        // We're shutting down, so don't bother doing anything else.
+        return;
+    }
     teardown_managed_proxy(null, gc_handle);
 }
 

@@ -5,6 +5,7 @@
 /// <reference path="./types/v8.d.ts" />
 /// <reference path="./types/node.d.ts" />
 
+import { mono_log_error } from "./logging";
 import { RuntimeAPI } from "./types/index";
 import type { GlobalObjects, EmscriptenInternals, RuntimeHelpers, LoaderHelpers, DotnetModuleInternal, PromiseAndController } from "./types/internal";
 
@@ -72,4 +73,20 @@ export function setRuntimeGlobals(globalObjects: GlobalObjects) {
 
 export function createPromiseController<T>(afterResolve?: () => void, afterReject?: () => void): PromiseAndController<T> {
     return loaderHelpers.createPromiseController<T>(afterResolve, afterReject);
+}
+
+// this will abort the program if the condition is false
+// see src\mono\wasm\runtime\rollup.config.js
+// we inline the condition, because the lambda could allocate closure on hot path otherwise
+export function mono_assert(condition: unknown, messageFactory: string | (() => string)): asserts condition {
+    if (condition) return;
+    const message = "Assert failed: " + (typeof messageFactory === "function"
+        ? messageFactory()
+        : messageFactory);
+    const abort = runtimeHelpers.mono_wasm_abort;
+    if (abort) {
+        mono_log_error(message);
+        abort();
+    }
+    throw new Error(message);
 }
@@ -2,7 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 import { wrap_as_cancelable_promise } from "./cancelable-promise";
-import { ENVIRONMENT_IS_NODE, Module, loaderHelpers } from "./globals";
+import { ENVIRONMENT_IS_NODE, Module, loaderHelpers, mono_assert } from "./globals";
 import { MemoryViewType, Span } from "./marshal";
 import type { VoidPtr } from "./types/emscripten";