Fix crash in x64: handler's pc-offset must be in 32-bit uword range

runtime/vm/code_descriptors.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 VM_CODE_DESCRIPTORS_H_
 #define VM_CODE_DESCRIPTORS_H_
 
 #include "vm/ast.h"
 #include "vm/code_generator.h"
 #include "vm/globals.h"
@@ skipping 97 matching lines @@
   };
 
   ExceptionHandlerList() : list_() {}
 
   intptr_t Length() const {
     return list_.length();
   }
 
   void AddPlaceHolder() {
     struct HandlerDesc data;
     data.outer_try_index = -1;

[Ivan Posva, 2015/03/12 20:53:35]

kInvalidTryIndex

This or next CL.

[srdjan, 2015/03/12 21:39:59]

Theres is a CatchClauseNode::kInvalidTryIndex. Next CL.

-    data.pc_offset = -1;
+    data.pc_offset = ExceptionHandlers::kInvalidPcOffset;
     data.handler_types = NULL;
     data.needs_stacktrace = false;
     list_.Add(data);
   }
 
   void AddHandler(intptr_t try_index,
                   intptr_t outer_try_index,
                   intptr_t pc_offset,
                   const Array& handler_types,
                   bool needs_stacktrace) {
@@ skipping 35 matching lines @@
   RawExceptionHandlers* FinalizeExceptionHandlers(uword entry_point) const;
 
  private:
   GrowableArray<struct HandlerDesc> list_;
   DISALLOW_COPY_AND_ASSIGN(ExceptionHandlerList);
 };
 
 }  // namespace dart
 
 #endif  // VM_CODE_DESCRIPTORS_H_