Special printing for type feedback vectors.

src/objects-printer.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/disasm.h"
 #include "src/disassembler.h"
 #include "src/heap/objects-visiting.h"
 #include "src/jsregexp.h"
@@ skipping 485 matching lines @@
     if (is_the_hole(i)) {
       os << "<the hole>";
     } else {
       os << get_scalar(i);
     }
   }
   os << "\n";
 }
 
 
+void TypeFeedbackVector::Print() {
+  OFStream os(stdout);
+  TypeFeedbackVectorPrint(os);
+  os << std::flush;
+}
+
+
+void TypeFeedbackVector::TypeFeedbackVectorPrint(std::ostream& os) {  // NOLINT
+  HeapObject::PrintHeader(os, "TypeFeedbackVector");
+  os << " - length: " << length();
+  if (length() == 0) {
+    os << " (empty)\n";
+    return;
+  }
+
+  os << "\n - ics with type info: " << ic_with_type_info_count();
+  os << "\n - generic ics: " << ic_generic_count();
+
+  if (Slots() > 0) {
+    for (int i = 0; i < Slots(); i++) {
+      FeedbackVectorSlot slot(i);
+      os << "\n Slot " << i << " [" << GetIndex(slot)
+         << "]: " << Brief(Get(slot));
+    }
+  }
+
+  if (ICSlots() > 0) {
+    DCHECK(elements_per_ic_slot() == 2);
+
+    for (int i = 0; i < ICSlots(); i++) {
+      FeedbackVectorICSlot slot(i);
+      Code::Kind kind = GetKind(slot);
+      os << "\n ICSlot " << i;
+      if (kind == Code::LOAD_IC) {
+        LoadICNexus nexus(this, slot);
+        os << " LOAD_IC " << Code::ICState2String(nexus.StateFromFeedback());
+      } else if (kind == Code::KEYED_LOAD_IC) {
+        KeyedLoadICNexus nexus(this, slot);
+        os << " KEYED_LOAD_IC "
+           << Code::ICState2String(nexus.StateFromFeedback());
+      } else {
+        DCHECK(kind == Code::CALL_IC);
+        CallICNexus nexus(this, slot);
+        os << " CALL_IC " << Code::ICState2String(nexus.StateFromFeedback());
+      }
+
+      os << "\n  [" << GetIndex(slot) << "]: " << Brief(Get(slot));
+      os << "\n  [" << (GetIndex(slot) + 1)
+         << "]: " << Brief(get(GetIndex(slot) + 1));
+    }
+  }
+  os << "\n";
+}
+
+
 void JSValue::JSValuePrint(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "ValueObject");
   value()->Print(os);
 }
 
 
 void JSMessageObject::JSMessageObjectPrint(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "JSMessageObject");
   os << " - type: " << type();
   os << "\n - arguments: " << Brief(argument());
@@ skipping 238 matching lines @@
   // os << "\n - script =";
   // script()->Print(os);
   os << "\n - function token position = " << function_token_position();
   os << "\n - start position = " << start_position();
   os << "\n - end position = " << end_position();
   os << "\n - is expression = " << is_expression();
   os << "\n - debug info = " << Brief(debug_info());
   os << "\n - length = " << length();
   os << "\n - optimized_code_map = " << Brief(optimized_code_map());
   os << "\n - feedback_vector = ";
-  feedback_vector()->FixedArrayPrint(os);
+  feedback_vector()->TypeFeedbackVectorPrint(os);
   os << "\n";
 }
 
 
 void JSGlobalProxy::JSGlobalProxyPrint(std::ostream& os) {  // NOLINT
   os << "global_proxy ";
   JSObjectPrint(os);
   os << "native context : " << Brief(native_context());
   os << "\n";
 }
@@ skipping 393 matching lines @@
   }
 }
 
 
 void JSObject::PrintTransitions(std::ostream& os) {  // NOLINT
   TransitionArray::PrintTransitions(os, map()->raw_transitions());
 }
 #endif  // defined(DEBUG) || defined(OBJECT_PRINT)
 }  // namespace internal
 }  // namespace v8