Re-landing of "replace TrySync with Metadata".

runtime/vm/raw_object.h

 // 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.
 
 #ifndef RUNTIME_VM_RAW_OBJECT_H_
 #define RUNTIME_VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/atomic.h"
+#include "vm/exceptions.h"
 #include "vm/globals.h"
 #include "vm/snapshot.h"
 #include "vm/token.h"
 #include "vm/token_position.h"
 
 namespace dart {
 
 // Macrobatics to define the Object hierarchy of VM implementation classes.
 #define CLASS_LIST_NO_OBJECT_NOR_STRING_NOR_ARRAY(V)                           \
   V(Class)                                                                     \
@@ skipping 1111 matching lines @@
     return reinterpret_cast<RawObject**>(&ptr()->object_pool_);
   }
   RawObjectPool* object_pool_;     // Accessed from generated code.
   RawInstructions* instructions_;  // Accessed from generated code.
   // If owner_ is Function::null() the owner is a regular stub.
   // If owner_ is a Class the owner is the allocation stub for that class.
   // Else, owner_ is a regular Dart Function.
   RawObject* owner_;  // Function, Null, or a Class.
   RawExceptionHandlers* exception_handlers_;
   RawPcDescriptors* pc_descriptors_;
+  union {
+    RawTypedData* catch_entry_state_maps_;
+    RawSmi* variables_;
+  } catch_entry_;
   RawArray* stackmaps_;
   RawArray* inlined_id_to_function_;
   RawCodeSourceMap* code_source_map_;
   NOT_IN_PRECOMPILED(RawArray* await_token_positions_);
   NOT_IN_PRECOMPILED(RawInstructions* active_instructions_);
   NOT_IN_PRECOMPILED(RawArray* deopt_info_array_);
   // (code-offset, function, code) triples.
   NOT_IN_PRECOMPILED(RawArray* static_calls_target_table_);
   // If return_address_metadata_ is a Smi, it is the offset to the prologue.
   // Else, return_address_metadata_ is null.
@@ skipping 1287 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_RAW_OBJECT_H_