Report FATAL OOM error when the old heap space is exhausted.

vm/heap.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/heap.h"
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/compiler_stats.h"
 #include "vm/flags.h"
@@ skipping 63 matching lines @@
   uword addr = old_space_->TryAllocate(size);
   if (addr == 0) {
     CollectAllGarbage();
     if (FLAG_verbose_gc) {
       OS::PrintErr("New space (%dk) Old space (%dk) Code space (%dk)\n",
                    (new_space_->in_use() / KB),
                    (old_space_->in_use() / KB),
                    (code_space_->in_use() / KB));
     }
     addr = old_space_->TryAllocate(size);
+    if (addr == 0) {
+      // TODO(iposva): Support possible heap growth.
+      FATAL("Exhausted heap space.");
+    }
   }
   return addr;
 }
 
 
 uword Heap::AllocateCode(intptr_t size) {
   ASSERT(Isolate::Current()->no_gc_scope_depth() == 0);
   ASSERT(Utils::IsAligned(size, OS::PreferredCodeAlignment()));
   uword addr = code_space_->TryAllocate(size);
   if (addr == 0) {
@@ skipping 113 matching lines @@
   isolate()->IncrementNoGCScopeDepth();
 }
 
 
 NoGCScope::~NoGCScope() {
   isolate()->DecrementNoGCScopeDepth();
 }
 #endif  // defined(DEBUG)
 
 }  // namespace dart