LiveEdit: implement stack manipulations for x64

src/debug.cc

Index: src/debug.cc
diff --git a/src/debug.cc b/src/debug.cc
index dbf9df9fda3d8e759f97703f4e6695df740104b8..c13c8c98785b634dc2c300295ef61f0844b0b9d9 100644
--- a/src/debug.cc
+++ b/src/debug.cc
@@ -582,6 +582,35 @@ int Debug::ArchiveSpacePerThread() {
 }
 
 
+// Frame structure (conforms InternalFrame structure):
+//   -- code
+//   -- SMI maker
+//   -- function (slot is called "context")
+//   -- frame base
+Object** Debug::SetUpFrameDropperFrame(StackFrame* bottom_js_frame,
+                                       Handle<Code> code) {
+  ASSERT(bottom_js_frame->is_java_script());
+
+  Address fp = bottom_js_frame->fp();
+
+  // Move function pointer into "context" slot.
+  Memory::Object_at(fp + StandardFrameConstants::kContextOffset) =
+      Memory::Object_at(fp + JavaScriptFrameConstants::kFunctionOffset);
+
+  Memory::Object_at(fp + InternalFrameConstants::kCodeOffset) = *code;
+  Memory::Object_at(fp + StandardFrameConstants::kMarkerOffset) =
+      Smi::FromInt(StackFrame::INTERNAL);
+
+  return reinterpret_cast<Object**>(&Memory::Object_at(
+      fp + StandardFrameConstants::kContextOffset));
+}
+
+const int Debug::kFrameDropperFrameSize = 4;
+
+
+
+
+
 // Default break enabled.
 bool Debug::disable_break_ = false;