No longer OOM on invalid string length.

src/heap-inl.h

 // 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 120 matching lines @@
   if (IsOneByte(t, chars)) {
     return AllocateInternalizedStringImpl<true>(t, chars, hash_field);
   }
   return AllocateInternalizedStringImpl<false>(t, chars, hash_field);
 }
 
 
 MaybeObject* Heap::AllocateOneByteInternalizedString(Vector<const uint8_t> str,
                                                      uint32_t hash_field) {
   if (str.length() > String::kMaxLength) {
-    v8::internal::Heap::FatalProcessOutOfMemory("invalid string length", true);
+    return isolate()->ThrowInvalidStringLength();
   }
   // Compute map and object size.
   Map* map = ascii_internalized_string_map();
   int size = SeqOneByteString::SizeFor(str.length());
   AllocationSpace space = SelectSpace(size, OLD_DATA_SPACE, TENURED);
 
   // Allocate string.
   Object* result;
   { MaybeObject* maybe_result = AllocateRaw(size, space, OLD_DATA_SPACE);
     if (!maybe_result->ToObject(&result)) return maybe_result;
@@ skipping 12 matching lines @@
   OS::MemCopy(answer->address() + SeqOneByteString::kHeaderSize,
               str.start(), str.length());
 
   return answer;
 }
 
 
 MaybeObject* Heap::AllocateTwoByteInternalizedString(Vector<const uc16> str,
                                                      uint32_t hash_field) {
   if (str.length() > String::kMaxLength) {
-    v8::internal::Heap::FatalProcessOutOfMemory("invalid string length", true);
+    return isolate()->ThrowInvalidStringLength();
   }
   // Compute map and object size.
   Map* map = internalized_string_map();
   int size = SeqTwoByteString::SizeFor(str.length());
   AllocationSpace space = SelectSpace(size, OLD_DATA_SPACE, TENURED);
 
   // Allocate string.
   Object* result;
   { MaybeObject* maybe_result = AllocateRaw(size, space, OLD_DATA_SPACE);
     if (!maybe_result->ToObject(&result)) return maybe_result;
@@ skipping 647 matching lines @@
 
 
 double GCTracer::SizeOfHeapObjects() {
   return (static_cast<double>(heap_->SizeOfObjects())) / MB;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_INL_H_