Experimental code to detect transitive closure of parser code which causes new-space allocations

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 1889 matching lines @@
 #endif
 }
 
 
 RawObject* Object::Allocate(intptr_t cls_id, intptr_t size, Heap::Space space) {
   ASSERT(Utils::IsAligned(size, kObjectAlignment));
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();
   // New space allocation allowed only in mutator thread (Dart thread);
   ASSERT(thread->IsMutatorThread() || (space != Heap::kNew));
+  RELEASE_ASSERT(!thread->IsInsideParser() || (space != Heap::kNew));
   ASSERT(thread->no_callback_scope_depth() == 0);
   Heap* heap = isolate->heap();
 
   uword address = heap->Allocate(size, space);
   if (address == 0) {
     // Use the preallocated out of memory exception to avoid calling
     // into dart code or allocating any code.
     const Instance& exception =
         Instance::Handle(isolate->object_store()->out_of_memory());
     Exceptions::Throw(thread, exception);
@@ skipping 1165 matching lines @@
   src_pieces.Add(expr);
   src_pieces.Add(Symbols::Semicolon());
   return String::ConcatAll(Array::Handle(Array::MakeArray(src_pieces)));
 }
 
 
 RawFunction* Function::EvaluateHelper(const Class& cls,
                                       const String& expr,
                                       const Array& param_names,
                                       bool is_static) {
+  LeaveParserScope _(Thread::Current());
   const String& func_src =
       String::Handle(BuildClosureSource(param_names, expr));
   Script& script = Script::Handle();
   script =
       Script::New(Symbols::EvalSourceUri(), func_src, RawScript::kEvaluateTag);
   // In order to tokenize the source, we need to get the key to mangle
   // private names from the library from which the class originates.
   const Library& lib = Library::Handle(cls.library());
   ASSERT(!lib.IsNull());
   const String& lib_key = String::Handle(lib.private_key());
@@ skipping 20248 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart