VM: Prohibit reload when throwing or processing language errors.

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/become.h"
@@ skipping 15350 matching lines @@
   if (!prev_error.IsNull()) {
     result = String::Concat(
         String::Handle(String::New(prev_error.ToErrorCString())), result);
   }
   set_formatted_message(result);
   return result.raw();
 }
 
 
 const char* LanguageError::ToErrorCString() const {
+  Thread* thread = Thread::Current();
+  NoReloadScope no_reload_scope(thread->isolate(), thread);
   const String& msg_str = String::Handle(FormatMessage());
   return msg_str.ToCString();
 }
 
 
 const char* LanguageError::ToCString() const {
   return "LanguageError";
 }
 
 
@@ skipping 37 matching lines @@
 
 
 void UnhandledException::set_stacktrace(const Instance& stacktrace) const {
   StorePointer(&raw_ptr()->stacktrace_, stacktrace.raw());
 }
 
 
 const char* UnhandledException::ToErrorCString() const {
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();
+  NoReloadScope no_reload_scope(isolate, thread);
   HANDLESCOPE(thread);
   Object& strtmp = Object::Handle();
   const char* exc_str;
   if (exception() == isolate->object_store()->out_of_memory()) {
     exc_str = "Out of Memory";
   } else if (exception() == isolate->object_store()->stack_overflow()) {
     exc_str = "Stack Overflow";
   } else {
     const Instance& exc = Instance::Handle(exception());
     strtmp = DartLibraryCalls::ToString(exc);
@@ skipping 7745 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart