[Wasm] Wasi stdlib implementation

KT-56608

libraries/stdlib/wasm/js/internal/ExceptionHelpers.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.wasm.internal
+
+@Suppress("UNUSED_PARAMETER") // TODO: Remove after bootstrap update
+private fun throwJsError(message: String?, wasmTypeName: String?, stack: ExternalInterfaceType): Nothing {
+    js("""
+    const error = new Error();
+    error.message = message;
+    error.name = wasmTypeName;
+    error.stack = stack;
+    throw error;
+    """)
+}
+
+internal fun throwAsJsException(t: Throwable): Nothing {
+    throwJsError(t.message, getSimpleName(t.typeInfo), t.jsStack)
+}