Bug 1632683 - Define @@toStringTag on miscellaneous objects. r=jonco

Differential Revision: https://phabricator.services.mozilla.com/D72247

js/src/debugger/Debugger.cpp

@@ -121,7 +121,7 @@
 #include "vm/JSAtom-inl.h"         // for AtomToId, ValueToId
 #include "vm/JSContext-inl.h"      // for JSContext::check
 #include "vm/JSObject-inl.h"  // for JSObject::isCallable, NewTenuredObjectWithGivenProto
-#include "vm/JSScript-inl.h"       // for JSScript::isDebuggee, JSScript
+#include "vm/JSScript-inl.h"      // for JSScript::isDebuggee, JSScript
 #include "vm/NativeObject-inl.h"  // for NativeObject::ensureDenseInitializedLength
 #include "vm/ObjectOperations-inl.h"  // for GetProperty, HasProperty
 #include "vm/Realm-inl.h"             // for AutoRealm::AutoRealm
@@ -6075,6 +6075,7 @@ const JSPropertySpec Debugger::properties[] = {
     JS_DEBUG_PSGS("collectCoverageInfo", getCollectCoverageInfo,
                   setCollectCoverageInfo),
     JS_DEBUG_PSG("memory", getMemory),
+    JS_STRING_SYM_PS(toStringTag, "Debugger", JSPROP_READONLY),
     JS_PS_END};
 
 const JSFunctionSpec Debugger::methods[] = {

js/src/shell/js.cpp

@@ -10224,6 +10224,10 @@ static JSObject* NewGlobalObject(JSContext* cx, JS::RealmOptions& options,
     /* Initialize FakeDOMObject.prototype */
     InitDOMObject(domProto);
 
+    if (!DefineToStringTag(cx, glob, cx->names().global)) {
+      return nullptr;
+    }
+
     JS_FireOnNewGlobalObject(cx, glob);
   }
 

js/src/vm/SavedStacks.cpp

@@ -394,6 +394,7 @@ const JSClass SavedFrame::protoClass_ = {
     JS_PSG("asyncCause", SavedFrame::asyncCauseProperty, 0),
     JS_PSG("asyncParent", SavedFrame::asyncParentProperty, 0),
     JS_PSG("parent", SavedFrame::parentProperty, 0),
+    JS_STRING_SYM_PS(toStringTag, "SavedFrame", JSPROP_READONLY),
     JS_PS_END};
 
 /* static */