Adds debugger patching to arm64.

runtime/vm/flow_graph_compiler_arm64.cc

 // Copyright (c) 2014, 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_ARM64.
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 884 matching lines @@
 
   __ Bind(&wrong_num_arguments);
   if (function.IsClosureFunction()) {
     // Invoke noSuchMethod function passing "call" as the original name.
     const int kNumArgsChecked = 1;
     const ICData& ic_data = ICData::ZoneHandle(
         ICData::New(function, Symbols::Call(), Object::empty_array(),
                     Isolate::kNoDeoptId, kNumArgsChecked));
     __ LoadObject(R5, ic_data, PP);
     __ LeaveDartFrame();  // The arguments are still on the stack.
-    __ BranchFixed(&StubCode::CallNoSuchMethodFunctionLabel());
+    __ BranchPatchable(&StubCode::CallNoSuchMethodFunctionLabel());
     // The noSuchMethod call may return to the caller, but not here.
     __ hlt(0);
   } else if (check_correct_named_args) {
     __ Stop("Wrong arguments");
   }
 
   __ Bind(&all_arguments_processed);
   // Nullify originally passed arguments only after they have been copied and
   // checked, otherwise noSuchMethod would not see their original values.
   // This step can be skipped in case we decide that formal parameters are
@@ skipping 154 matching lines @@
         const String& name =
             String::Handle(function.IsClosureFunction()
                              ? Symbols::Call().raw()
                              : function.name());
         const int kNumArgsChecked = 1;
         const ICData& ic_data = ICData::ZoneHandle(
             ICData::New(function, name, Object::empty_array(),
                         Isolate::kNoDeoptId, kNumArgsChecked));
         __ LoadObject(R5, ic_data, PP);
         __ LeaveDartFrame();  // The arguments are still on the stack.
-        __ BranchFixed(&StubCode::CallNoSuchMethodFunctionLabel());
+        __ BranchPatchable(&StubCode::CallNoSuchMethodFunctionLabel());
         // The noSuchMethod call may return to the caller, but not here.
         __ hlt(0);
       } else {
         __ Stop("Wrong number of arguments");
       }
       __ Bind(&correct_num_arguments);
     }
   } else if (!flow_graph().IsCompiledForOsr()) {
     CopyParameters();
   }
@@ skipping 12 matching lines @@
 
   VisitBlocks();
 
   __ hlt(0);
   GenerateDeferredCode();
   // Emit function patching code. This will be swapped with the first 3
   // instructions at entry point.
   AddCurrentDescriptor(PcDescriptors::kPatchCode,
                        Isolate::kNoDeoptId,
                        0);  // No token position.
-  __ BranchFixed(&StubCode::FixCallersTargetLabel());
+  __ BranchPatchable(&StubCode::FixCallersTargetLabel());
 
   AddCurrentDescriptor(PcDescriptors::kLazyDeoptJump,
                        Isolate::kNoDeoptId,
                        0);  // No token position.
-  // TODO(zra): Can I use a normal BranchPatchable here? Probably have to change
-  // the CodePatcher.
-  __ BranchFixed(&StubCode::DeoptimizeLazyLabel());
+  __ BranchPatchable(&StubCode::DeoptimizeLazyLabel());
 }
 
 
 void FlowGraphCompiler::GenerateCall(intptr_t token_pos,
                                      const ExternalLabel* label,
                                      PcDescriptors::Kind kind,
                                      LocationSummary* locs) {
   __ BranchLinkPatchable(label);
   AddCurrentDescriptor(kind, Isolate::kNoDeoptId, token_pos);
   RecordSafepoint(locs);
@@ skipping 643 matching lines @@
 void ParallelMoveResolver::RestoreFpuScratch(FpuRegister reg) {
   UNIMPLEMENTED();
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64