deps: V8: cherry-pick 435a2cdf664c

Original commit message:

    [wasm] Update WebAssembly.Exception JS API

    WebIDL specifies the existence of a
    `WebAssembly.Exception.prototype.stack` getter.
    WebIDL also expects the constructor to have 2 parameters (plus an
    optional one).

    https://webassembly.github.io/spec/js-api/#exceptions

    Bug: 336347912, 42204334
    Change-Id: I128e976a84f942dcf9b93a157534b15fad0f9215
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/7697976
    Commit-Queue: Matthias Liedtke <mliedtke@chromium.org>
    Auto-Submit: Matthias Liedtke <mliedtke@chromium.org>
    Commit-Queue: Clemens Backes <clemensb@chromium.org>
    Reviewed-by: Clemens Backes <clemensb@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#106215}

Refs: v8/v8@435a2cd
PR-URL: #63136
Reviewed-By: Filip Skokan <panva.ip@gmail.com>
Reviewed-By: Mattias Buelens <mattias@buelens.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: Liedtke

common.gypi

@@ -38,7 +38,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.49',
+    'v8_embedder_string': '-node.50',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/src/codegen/external-reference.h

@@ -364,6 +364,8 @@ enum class IsolateFieldId : uint8_t;
   IF_WASM(V, wasm_WebAssemblyExceptionGetArg,                                  \
           "wasm::WebAssemblyExceptionGetArg")                                  \
   IF_WASM(V, wasm_WebAssemblyExceptionIs, "wasm::WebAssemblyExceptionIs")      \
+  IF_WASM(V, wasm_WebAssemblyExceptionGetStack,                                \
+          "wasm::WebAssemblyExceptionGetStack")                                \
   IF_WASM(V, wasm_WebAssemblyGlobal, "wasm::WebAssemblyGlobal")                \
   IF_WASM(V, wasm_WebAssemblyGlobalGetValue,                                   \
           "wasm::WebAssemblyGlobalGetValue")                                   \

deps/v8/src/wasm/wasm-js.cc

@@ -3054,6 +3054,15 @@ void WebAssemblyExceptionIsImpl(
   info.GetReturnValue().Set(tag_object->tag() == *tag);
 }
 
+void WebAssemblyExceptionGetStackImpl(
+    const v8::FunctionCallbackInfo<v8::Value>& info) {
+  WasmJSApiScope js_api_scope{info, "WebAssembly.Exception.stack()"};
+  auto [isolate, i_isolate, thrower] = js_api_scope.isolates_and_thrower();
+  EXTRACT_THIS(exception, WasmExceptionPackage);
+
+  info.GetReturnValue().Set(v8::Undefined(isolate));
+}
+
 void WebAssemblyGlobalGetValueCommon(WasmJSApiScope& js_api_scope) {
   auto [isolate, i_isolate, thrower] = js_api_scope.isolates_and_thrower();
   auto& info = js_api_scope.callback_info();  // Needed by EXTRACT_THIS.
@@ -3494,6 +3503,7 @@ void WasmJs::PrepareForSnapshot(Isolate* isolate) {
   {
     DirectHandle<JSFunction> exception_constructor = InstallConstructorFunc(
         isolate, webassembly, "Exception", wasm::WebAssemblyException);
+    exception_constructor->shared()->set_length(2);
     SetDummyInstanceTemplate(isolate, exception_constructor);
     DirectHandle<JSObject> exception_proto = SetupConstructor(
         isolate, exception_constructor, WASM_EXCEPTION_PACKAGE_TYPE,
@@ -3503,6 +3513,8 @@ void WasmJs::PrepareForSnapshot(Isolate* isolate) {
                 wasm::WebAssemblyExceptionGetArg, 2);
     InstallFunc(isolate, exception_proto, "is", wasm::WebAssemblyExceptionIs,
                 1);
+    InstallGetter(isolate, exception_proto, "stack",
+                  wasm::WebAssemblyExceptionGetStack);
     native_context->set_wasm_exception_constructor(*exception_constructor);
 
     DirectHandle<Map> initial_map(exception_constructor->initial_map(),

deps/v8/src/wasm/wasm-js.h

@@ -33,6 +33,7 @@ V8_EXPORT_PRIVATE std::unique_ptr<WasmStreaming> StartStreamingForTesting(
   V(WebAssemblyCompile)                    \
   V(WebAssemblyException)                  \
   V(WebAssemblyExceptionGetArg)            \
+  V(WebAssemblyExceptionGetStack)          \
   V(WebAssemblyExceptionIs)                \
   V(WebAssemblyGlobal)                     \
   V(WebAssemblyGlobalGetValue)             \

deps/v8/test/mjsunit/wasm/exceptions-api.js

@@ -106,13 +106,19 @@ d8.file.execute("test/mjsunit/wasm/wasm-module-builder.js");
   print(arguments.callee.name);
   let tag = new WebAssembly.Tag({parameters: []});
   let exn = new WebAssembly.Exception(tag, []);
+  assertTrue('stack' in exn);
   assertEquals(undefined, exn.stack);
   exn = new WebAssembly.Exception(tag, [], {traceStack: false});
+  assertTrue('stack' in exn);
   assertEquals(undefined, exn.stack);
   exn = new WebAssembly.Exception(tag, [], {traceStack: true});
   assertTrue(exn.stack.indexOf(arguments.callee.name) > 0);
   assertThrows(() => new WebAssembly.Exception(tag, [], 0), TypeError,
                /Argument 2 is not an object/);
+  // The stack getter may only be used with a receiver that is a
+  // WebAssembly.Exception.
+  let proto = WebAssembly.Exception.prototype;
+  assertThrows(() => proto.stack, TypeError);
 })();
 
 (function TestCatchJSException() {
@@ -319,3 +325,7 @@ function TestGetArgHelper(types_str, types, values) {
   // Don't catch with implicit wrapping.
   assertThrowsEquals(() => instance.exports.test(obj), obj);
 })();
+
+(function TestExceptionConstructorLength() {
+  assertEquals(2, WebAssembly.Exception.length);
+})();