Track loading happening in parallel with background compilation and abort compilation if necessary.

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/cpu.h"
@@ skipping 2715 matching lines @@
   virtual void ReportSwitchingCode(const Code& code) {
     if (FLAG_trace_deoptimization || FLAG_trace_deoptimization_verbose) {
       Function& function = Function::Handle(code.function());
       THR_Print("Switching %s to unoptimized code because CHA invalid"
                 " (%s)\n",
                 function.ToFullyQualifiedCString(),
                 cls_.ToCString());
     }
   }
 
-  virtual void IncrementInvalidationGen() {
-    Isolate::Current()->IncrCHAInvalidationGen();
-  }
+  virtual void IncrementInvalidationGen() {}
 
  private:
   const Class& cls_;
   DISALLOW_COPY_AND_ASSIGN(CHACodeArray);
 };
 
 
 #if defined(DEBUG)
 static bool IsMutatorOrAtSafepoint() {
   Thread* thread = Thread::Current();
@@ skipping 7759 matching lines @@
 RawClass* LibraryPrefix::LookupClass(const String& class_name) const {
   const Object& obj = Object::Handle(LookupObject(class_name));
   if (obj.IsClass()) {
     return Class::Cast(obj).raw();
   }
   return Class::null();
 }
 
 
 void LibraryPrefix::set_is_loaded() const {
-  Isolate::Current()->IncrPrefixInvalidationGen();
   StoreNonPointer(&raw_ptr()->is_loaded_, true);
 }
 
 
 bool LibraryPrefix::LoadLibrary() const {
   // Non-deferred prefixes are loaded.
   ASSERT(is_deferred_load() || is_loaded());
   if (is_loaded()) {
     return true;  // Load request has already completed.
   }
@@ skipping 72 matching lines @@
   virtual void ReportSwitchingCode(const Code& code) {
     if (FLAG_trace_deoptimization || FLAG_trace_deoptimization_verbose) {
       THR_Print("Prefix '%s': disabling %s code for %s function '%s'\n",
           String::Handle(prefix_.name()).ToCString(),
           code.is_optimized() ? "optimized" : "unoptimized",
           code.IsDisabled() ? "'patched'" : "'unpatched'",
           Function::Handle(code.function()).ToCString());
     }
   }
 
-  virtual void IncrementInvalidationGen() {
-    Isolate::Current()->IncrPrefixInvalidationGen();
-  }
+  virtual void IncrementInvalidationGen() {}
 
  private:
   const LibraryPrefix& prefix_;
   DISALLOW_COPY_AND_ASSIGN(PrefixDependentArray);
 };
 
 
 void LibraryPrefix::RegisterDependentCode(const Code& code) const {
   ASSERT(is_deferred_load());
   // In background compilation, a library can be loaded while we are compiling.
@@ skipping 11117 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart