[wasm] prototype for breakpoint support.

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 3c5f4161fd00f8c162a8c0c21903cceeb8e9260f..84817160c7ae2539ea61722c2ed1942378985bbc 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -2238,28 +2238,34 @@ Handle<String> Factory::NumberToString(Handle<Object> number,
   return js_string;
 }
 
-
-Handle<DebugInfo> Factory::NewDebugInfo(Handle<SharedFunctionInfo> shared) {
+Handle<DebugInfo> Factory::NewDebugInfo(Handle<AbstractCode> code) {
   // Allocate initial fixed array for active break points before allocating the
   // debug info object to avoid allocation while setting up the debug info
   // object.
   Handle<FixedArray> break_points(
       NewFixedArray(DebugInfo::kEstimatedNofBreakPointsInFunction));
 
-  // Create and set up the debug info object. Debug info contains function, a
-  // copy of the original code, the executing code and initial fixed array for
-  // active break points.
+  // Create and set up the debug info object.
   Handle<DebugInfo> debug_info =
       Handle<DebugInfo>::cast(NewStruct(DEBUG_INFO_TYPE));
-  debug_info->set_shared(*shared);
+  debug_info->set_abstract_code(*code);
+  debug_info->set_break_points(*break_points);
+
+  return debug_info;
+}
+
+Handle<DebugInfo> Factory::NewDebugInfo(Handle<SharedFunctionInfo> shared) {
+  AbstractCode* code;
   if (shared->HasBytecodeArray()) {
     // We need to create a copy, but delay since this may cause heap
     // verification.
-    debug_info->set_abstract_code(AbstractCode::cast(shared->bytecode_array()));
+    code = AbstractCode::cast(shared->bytecode_array());
   } else {
-    debug_info->set_abstract_code(AbstractCode::cast(shared->code()));
+    code = AbstractCode::cast(shared->code());
   }
-  debug_info->set_break_points(*break_points);
+
+  Handle<DebugInfo> debug_info = NewDebugInfo(handle(code));
+  debug_info->set_shared(*shared);
   if (shared->HasBytecodeArray()) {
     // Create a copy for debugging.
     Handle<BytecodeArray> original(shared->bytecode_array());