Bailout if field state changed during background compilation.

runtime/vm/compiler.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/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 628 matching lines @@
           // Extract type feedback before the graph is built, as the graph
           // builder uses it to attach it to nodes.
           ASSERT(function.deoptimization_counter() <
                  FLAG_max_deoptimization_counter_threshold);
 
           // 'Freeze' ICData in background compilation so that it does not
           // change while compiling.
           const bool clone_descriptors = Compiler::IsBackgroundCompilation();
           function.RestoreICDataMap(ic_data_array, clone_descriptors);
 
+          if (Compiler::IsBackgroundCompilation() &&
+              (function.ic_data_array() == Array::null())) {
+            Compiler::AbortBackgroundCompilation(Thread::kNoDeoptId);
+          }
           if (FLAG_print_ic_data_map) {
             for (intptr_t i = 0; i < ic_data_array->length(); i++) {
               if ((*ic_data_array)[i] != NULL) {
                 THR_Print("%" Pd " ", i);
                 FlowGraphPrinter::PrintICData(*(*ic_data_array)[i]);
               }
             }
           }
         }
 
@@ skipping 1025 matching lines @@
     Thread* const thread = Thread::Current();
     const Object& result = PassiveObject::Handle(thread->sticky_error());
     thread->clear_sticky_error();
     return result.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 
+void Compiler::AbortBackgroundCompilation(intptr_t deopt_id) {
+  ASSERT(Compiler::IsBackgroundCompilation());
+  Thread::Current()->long_jump_base()->Jump(
+      deopt_id, Object::background_compilation_error());
+}
+
+
 // C-heap allocated background compilation queue element.
 class QueueElement {
  public:
   explicit QueueElement(const Function& function)
       : next_(NULL),
         function_(function.raw()) {
     ASSERT(Thread::Current()->IsMutatorThread());
   }
 
   ~QueueElement() {
@@ skipping 311 matching lines @@
 }
 
 
 
 RawObject* Compiler::ExecuteOnce(SequenceNode* fragment) {
   UNREACHABLE();
   return Object::null();
 }
 
 
+void Compiler::AbortBackgroundCompilation(intptr_t deopt_id) {
+  UNREACHABLE();
+}
+
+
 void BackgroundCompiler::CompileOptimized(const Function& function) {
   UNREACHABLE();
 }
 
 
 void BackgroundCompiler::VisitPointers(ObjectPointerVisitor* visitor) {
   UNREACHABLE();
 }
 
 
 void BackgroundCompiler::Stop(BackgroundCompiler* task) {
   UNREACHABLE();
 }
 
 
 void BackgroundCompiler::EnsureInit(Thread* thread) {
   UNREACHABLE();
 }
 
 #endif  // DART_PRECOMPILED_RUNTIME
 
 }  // namespace dart