Reland "No longer OOM on invalid string length."

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5385 matching lines @@
   i::Isolate* isolate = reinterpret_cast<internal::Isolate*>(v8_isolate);
   EnsureInitializedForIsolate(isolate, location);
   LOG_API(isolate, env);
   if (length == 0 && type != String::kUndetectableString) {
     return String::Empty(v8_isolate);
   }
   ENTER_V8(isolate);
   if (length == -1) length = StringLength(data);
   i::Handle<i::String> result = NewString(
       isolate->factory(), type, i::Vector<const Char>(data, length));
+  // We do not expect this to fail. Change this if it does.
+  CHECK(!result.is_null());
   if (type == String::kUndetectableString) {
     result->MarkAsUndetectable();
   }
   return Utils::ToLocal(result);
 }
 
 }  // anonymous namespace
 
 
 Local<String> String::NewFromUtf8(Isolate* isolate,
@@ skipping 37 matching lines @@
 
 Local<String> v8::String::Concat(Handle<String> left, Handle<String> right) {
   i::Handle<i::String> left_string = Utils::OpenHandle(*left);
   i::Isolate* isolate = left_string->GetIsolate();
   EnsureInitializedForIsolate(isolate, "v8::String::New()");
   LOG_API(isolate, "String::New(char)");
   ENTER_V8(isolate);
   i::Handle<i::String> right_string = Utils::OpenHandle(*right);
   i::Handle<i::String> result = isolate->factory()->NewConsString(left_string,
                                                                   right_string);
-  // We do not expect this to throw an exception. Change this if it does.
-  CHECK_NOT_EMPTY_HANDLE(isolate, result);
+  // We do not expect this to fail. Change this if it does.
+  CHECK(!result.is_null());
   return Utils::ToLocal(result);
 }
 
 
 static i::Handle<i::String> NewExternalStringHandle(
     i::Isolate* isolate,
     v8::String::ExternalStringResource* resource) {
-  return isolate->factory()->NewExternalStringFromTwoByte(resource);
+  i::Handle<i::String> result =
+      isolate->factory()->NewExternalStringFromTwoByte(resource);
+  // We do not expect this to fail. Change this if it does.
+  CHECK(!result.is_null());
+  return result;
 }
 
 
 static i::Handle<i::String> NewExternalAsciiStringHandle(
     i::Isolate* isolate,
     v8::String::ExternalAsciiStringResource* resource) {
-  return isolate->factory()->NewExternalStringFromAscii(resource);
+  i::Handle<i::String> result =
+      isolate->factory()->NewExternalStringFromAscii(resource);
+  // We do not expect this to fail. Change this if it does.
+  CHECK(!result.is_null());
+  return result;
 }
 
 
 Local<String> v8::String::NewExternal(
     Isolate* isolate,
     v8::String::ExternalStringResource* resource) {
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
   EnsureInitializedForIsolate(i_isolate, "v8::String::NewExternal()");
   LOG_API(i_isolate, "String::NewExternal");
   ENTER_V8(i_isolate);
@@ skipping 1503 matching lines @@
   i::Isolate* isolate = i::Isolate::Current();
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   const i::CodeEntry* entry = node->entry();
   if (!entry->has_name_prefix()) {
     return ToApiHandle<String>(
         isolate->factory()->InternalizeUtf8String(entry->name()));
   } else {
     i::Handle<i::String> cons = isolate->factory()->NewConsString(
         isolate->factory()->InternalizeUtf8String(entry->name_prefix()),
         isolate->factory()->InternalizeUtf8String(entry->name()));
-    // We do not expect this to throw an exception. Change this if it does.
-    CHECK_NOT_EMPTY_HANDLE(isolate, cons);
+    // We do not expect this to fail. Change this if it does.
+    CHECK(!cons.is_null());
     return ToApiHandle<String>(cons);
   }
 }
 
 
 int CpuProfileNode::GetScriptId() const {
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   const i::CodeEntry* entry = node->entry();
   return entry->script_id();
 }
@@ skipping 610 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal