Provide a mechanism for dumping of heap profiles on predefined events.

runtime/vm/exceptions.cc

 // Copyright (c) 2011, 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/exceptions.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/flags.h"
 #include "vm/object.h"
+#include "vm/object_store.h"
 #include "vm/stack_frame.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, print_stacktrace_at_throw, false,
-    "Prints a stack trace everytime a throw occurs.");
+            "Prints a stack trace everytime a throw occurs.");
+DEFINE_FLAG(bool, heap_profile_out_of_memory, false,
+            "Writes a heap profile on unhandled out-of-memory exceptions.");
 
 
 const char* Exceptions::kCastErrorDstName = "type cast";
 
 
 // Iterate through the stack frames and try to find a frame with an
 // exception handler. Once found, set the pc, sp and fp so that execution
 // can continue in that frame.
 static bool FindExceptionHandler(uword* handler_pc,
                                  uword* handler_sp,
@@ skipping 400 matching lines @@
     case kIsolateSpawn:
       library = Library::IsolateLibrary();
       class_name = Symbols::New("IsolateSpawnException");
       break;
   }
 
   return DartLibraryCalls::ExceptionCreate(library, class_name, arguments);
 }
 
 }  // namespace dart