Re-landing of "replace TrySync with Metadata".

runtime/vm/stack_frame.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/stack_frame.h"
 
 #include "platform/memory_sanitizer.h"
 #include "vm/assembler.h"
 #include "vm/deopt_instructions.h"
 #include "vm/isolate.h"
@@ skipping 232 matching lines @@
   ASSERT(pc_marker != 0);
   ASSERT(reinterpret_cast<RawObject*>(pc_marker)->GetClassId() == kCodeCid ||
          reinterpret_cast<RawObject*>(pc_marker) == Object::null());
   return reinterpret_cast<RawCode*>(pc_marker);
 }
 
 
 bool StackFrame::FindExceptionHandler(Thread* thread,
                                       uword* handler_pc,
                                       bool* needs_stacktrace,
-                                      bool* has_catch_all) const {
+                                      bool* has_catch_all,
+                                      bool* is_optimized) const {
   REUSABLE_CODE_HANDLESCOPE(thread);
   Code& code = reused_code_handle.Handle();
   code = LookupDartCode();
   if (code.IsNull()) {
     return false;  // Stub frames do not have exception handlers.
   }
+  *is_optimized = code.is_optimized();
   HandlerInfoCache* cache = thread->isolate()->handler_info_cache();
   ExceptionHandlerInfo* info = cache->Lookup(pc());
   if (info != NULL) {
     *handler_pc = code.PayloadStart() + info->handler_pc_offset;
     *needs_stacktrace = info->needs_stacktrace;
     *has_catch_all = info->has_catch_all;
     return true;
   }
   uword pc_offset = pc() - code.PayloadStart();
 
@@ skipping 311 matching lines @@
   StackFrameIterator frames(StackFrameIterator::kValidateFrames);
   StackFrame* frame = frames.NextFrame();
   while (frame != NULL) {
     frame = frames.NextFrame();
   }
 }
 #endif
 
 
 }  // namespace dart