Implement breakpoint for closure calls

runtime/vm/code_patcher_arm.cc

 // Copyright (c) 2013, 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/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/code_patcher.h"
 
 #include "vm/instructions.h"
 #include "vm/object.h"
 
 namespace dart {
 
+RawArray* CodePatcher::GetClosureArgDescAt(uword return_address,
+                                           const Code& code) {
+  ASSERT(code.ContainsInstructionAt(return_address));
+  CallPattern call(return_address, code);
+  return call.ArgumentsDescriptor();
+}
+
+
 uword CodePatcher::GetStaticCallTargetAt(uword return_address,
                                          const Code& code) {
   ASSERT(code.ContainsInstructionAt(return_address));
   CallPattern call(return_address, code);
   return call.TargetAddress();
 }
 
 
 void CodePatcher::PatchStaticCallAt(uword return_address,
                                     const Code& code,
@@ skipping 38 matching lines @@
 
 intptr_t CodePatcher::InstanceCallSizeInBytes() {
   // The instance call instruction sequence has a variable size on ARM.
   UNREACHABLE();
   return 0;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM