Add flag to tracing element kind transitions

src/frames.cc

Index: src/frames.cc
diff --git a/src/frames.cc b/src/frames.cc
index 412a59cc7d61aba1a7011fc7955fd34650dd6182..f97e5bef40bec9a6e2d101b22fd66390afcc262f 100644
--- a/src/frames.cc
+++ b/src/frames.cc
@@ -711,6 +711,56 @@ void JavaScriptFrame::Summarize(List<FrameSummary>* functions) {
 }
 
 
+void JavaScriptFrame::PrintTop(bool print_args, bool print_line_number) {
+  // constructor calls
+  HandleScope scope;
+  AssertNoAllocation no_allocation;
+  JavaScriptFrameIterator it;
+  while (!it.done()) {
+    if (it.frame()->is_java_script()) {
+      JavaScriptFrame* frame = it.frame();
+      if (frame->IsConstructor()) PrintF("new ");
+      // function name
+      Object* fun = frame->function();
+      if (fun->IsJSFunction()) {
+        JSFunction::cast(fun)->shared()->name()->MiniPrint();
+      } else {
+        fun->MiniPrint();
+      }
+      if (print_line_number) {
+        PrintF(" ");

[Jakob Kummerow, 2011/10/19 16:02:28]

Insert this printed space into the PrintF() below.

+        Address pc = frame->pc();
+        Code* code = Code::cast(
+            v8::internal::Isolate::Current()->heap()->FindCodeObject(pc));
+        int source_pos = code->SourcePosition(pc);
+        SharedFunctionInfo* shared = JSFunction::cast(fun)->shared();
+        Handle<Script> script(Script::cast(shared->script()));
+        int line = GetScriptLineNumberSafe(script, source_pos) + 1;
+        String* script_name = String::cast(script->name());
+        SmartArrayPointer<char> c_script_name =
+            script_name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
+        PrintF("%s:%d", *c_script_name, line);
+      }
+      if (print_args) {
+        // function arguments
+        // (we are intentionally only printing the actually
+        // supplied parameters, not all parameters required)
+        PrintF("(this=");
+        frame->receiver()->MiniPrint();
+        const int length = frame->ComputeParametersCount();
+        for (int i = 0; i < length; i++) {
+          PrintF(", ");
+          frame->GetParameter(i)->MiniPrint();
+        }
+        PrintF(")");
+      }
+      break;
+    }
+    it.Advance();
+  }
+}
+
+
 void FrameSummary::Print() {
   PrintF("receiver: ");
   receiver_->ShortPrint();