More details printed for Map, DescriptorArray and TransitionArray.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/659363002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24837 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/objects-printer.cc

@@ -347,39 +347,7 @@ void JSObject::PrintElements(std::ostream& os) {  // NOLINT
 
 void JSObject::PrintTransitions(std::ostream& os) {  // NOLINT
   if (!map()->HasTransitionArray()) return;
-  TransitionArray* transitions = map()->transitions();
-  for (int i = 0; i < transitions->number_of_transitions(); i++) {
-    Name* key = transitions->GetKey(i);
-    os << "   ";
-    key->NamePrint(os);
-    os << ": ";
-    if (key == GetHeap()->frozen_symbol()) {
-      os << " (transition to frozen)\n";
-    } else if (key == GetHeap()->elements_transition_symbol()) {
-      os << " (transition to "
-         << ElementsKindToString(transitions->GetTarget(i)->elements_kind())
-         << ")\n";
-    } else if (key == GetHeap()->observed_symbol()) {
-      os << " (transition to Object.observe)\n";
-    } else {
-      switch (transitions->GetTargetDetails(i).type()) {
-        case FIELD: {
-          os << " (transition to field)\n";
-          break;
-        }
-        case CONSTANT:
-          os << " (transition to constant)\n";
-          break;
-        case CALLBACKS:
-          os << " (transition to callback)\n";
-          break;
-        // Values below are never in the target descriptor array.
-        case NORMAL:
-          UNREACHABLE();
-          break;
-      }
-    }
-  }
+  map()->transitions()->PrintTransitions(os, false);
 }
 
 
@@ -442,6 +410,8 @@ void Map::MapPrint(std::ostream& os) {  // NOLINT
   os << "\n - pre-allocated property fields: "
      << pre_allocated_property_fields() << "\n";
   os << " - unused property fields: " << unused_property_fields() << "\n";
+  if (is_dictionary_map()) os << " - dictionary_map\n";
+  if (is_prototype_map()) os << " - prototype_map\n";
   if (is_hidden_prototype()) os << " - hidden_prototype\n";
   if (has_named_interceptor()) os << " - named_interceptor\n";
   if (has_indexed_interceptor()) os << " - indexed_interceptor\n";
@@ -605,10 +575,13 @@ void String::StringPrint(std::ostream& os) {  // NOLINT
 
 
 void Name::NamePrint(std::ostream& os) {  // NOLINT
-  if (IsString())
+  if (IsString()) {
     String::cast(this)->StringPrint(os);
-  else
+  } else if (IsSymbol()) {
+    Symbol::cast(this)->name()->Print(os);
+  } else {
     os << Brief(this);
+  }
 }
 
 
@@ -1082,41 +1055,70 @@ void BreakPointInfo::BreakPointInfoPrint(std::ostream& os) {  // NOLINT
 }
 
 
+void DescriptorArray::Print() {
+  OFStream os(stdout);
+  this->PrintDescriptors(os);
+  os << std::flush;
+}
+
+
 void DescriptorArray::PrintDescriptors(std::ostream& os) {  // NOLINT
   os << "Descriptor array " << number_of_descriptors() << "\n";
   for (int i = 0; i < number_of_descriptors(); i++) {
     Descriptor desc;
     Get(i, &desc);
-    os << " " << i << ": " << desc;
+    os << " " << i << ": " << desc << "\n";
   }
   os << "\n";
 }
 
 
-void TransitionArray::PrintTransitions(std::ostream& os) {  // NOLINT
-  os << "Transition array  %d\n", number_of_transitions();
+void TransitionArray::Print() {
+  OFStream os(stdout);
+  this->PrintTransitions(os);
+  os << std::flush;
+}
+
+
+void TransitionArray::PrintTransitions(std::ostream& os,
+                                       bool print_header) {  // NOLINT
+  if (print_header) {
+    os << "Transition array " << number_of_transitions() << "\n";
+  }
   for (int i = 0; i < number_of_transitions(); i++) {
-    os << " " << i << ": ";
-    GetKey(i)->NamePrint(os);
+    Name* key = GetKey(i);
+    os << "   ";
+    key->NamePrint(os);
     os << ": ";
-    switch (GetTargetDetails(i).type()) {
+    if (key == GetHeap()->frozen_symbol()) {
+      os << " (transition to frozen)";
+    } else if (key == GetHeap()->elements_transition_symbol()) {
+      os << " (transition to "
+         << ElementsKindToString(GetTarget(i)->elements_kind()) << ")";
+    } else if (key == GetHeap()->observed_symbol()) {
+      os << " (transition to Object.observe)";
+    } else {
+      PropertyDetails details = GetTargetDetails(i);
+      switch (details.type()) {
         case FIELD: {
-        os << " (transition to field)\n";
+          os << " (transition to field)";
           break;
         }
         case CONSTANT:
-        os << " (transition to constant)\n";
+          os << " (transition to constant " << Brief(GetTargetValue(i)) << ")";
           break;
         case CALLBACKS:
-        os << " (transition to callback)\n";
+          os << " (transition to callback " << Brief(GetTargetValue(i)) << ")";
           break;
         // Values below are never in the target descriptor array.
         case NORMAL:
           UNREACHABLE();
           break;
       }
+      os << ", attrs: " << details.attributes();
+    }
+    os << " -> " << Brief(GetTarget(i)) << "\n";
   }
-  os << "\n";
 }
 
 

src/objects.cc

@@ -13138,7 +13138,7 @@ void Dictionary<Derived, Shape, Key>::Print(std::ostream& os) {  // NOLINT
       } else {
         os << Brief(k);
       }
-      os << ": " << Brief(ValueAt(i)) << "\n";
+      os << ": " << Brief(ValueAt(i)) << " " << DetailsAt(i) << "\n";
     }
   }
 }

src/objects.h

@@ -3051,6 +3051,9 @@ class DescriptorArray: public FixedArray {
   static const int kDescriptorSize = 3;
 
 #ifdef OBJECT_PRINT
+  // For our gdb macros, we should perhaps change these in the future.
+  void Print();
+
   // Print all the descriptors.
   void PrintDescriptors(std::ostream& os);  // NOLINT
 #endif

src/property-details.h

@@ -295,6 +295,10 @@ class PropertyDetails BASE_EMBEDDED {
   uint32_t value_;
 };
 
+
+std::ostream& operator<<(std::ostream& os,
+                         const PropertyAttributes& attributes);
+std::ostream& operator<<(std::ostream& os, const PropertyDetails& details);
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_DETAILS_H_

src/property.cc

@@ -31,9 +31,43 @@ std::ostream& operator<<(std::ostream& os, const LookupResult& r) {
 }
 
 
+std::ostream& operator<<(std::ostream& os,
+                         const PropertyAttributes& attributes) {
+  os << "[";
+  os << (((attributes & READ_ONLY) == 0) ? "W" : "_");    // writable
+  os << (((attributes & DONT_ENUM) == 0) ? "E" : "_");    // enumerable
+  os << (((attributes & DONT_DELETE) == 0) ? "C" : "_");  // configurable
+  os << "]";
+  return os;
+}
+
+
+std::ostream& operator<<(std::ostream& os, const PropertyDetails& details) {
+  os << "(";
+  switch (details.type()) {
+    case NORMAL:
+      os << "normal: dictionary_index: " << details.dictionary_index();
+      break;
+    case CONSTANT:
+      os << "constant: p: " << details.pointer();
+      break;
+    case FIELD:
+      os << "field: " << details.representation().Mnemonic()
+         << ", field_index: " << details.field_index()
+         << ", p: " << details.pointer();
+      break;
+    case CALLBACKS:
+      os << "callbacks: p: " << details.pointer();
+      break;
+  }
+  os << ", attrs: " << details.attributes() << ")";
+  return os;
+}
+
+
 std::ostream& operator<<(std::ostream& os, const Descriptor& d) {
   return os << "Descriptor " << Brief(*d.GetKey()) << " @ "
-            << Brief(*d.GetValue());
+            << Brief(*d.GetValue()) << " " << d.GetDetails();
 }
 
 } }  // namespace v8::internal

src/transitions-inl.h

@@ -134,6 +134,12 @@ PropertyDetails TransitionArray::GetTargetDetails(int transition_number) {
 }
 
 
+Object* TransitionArray::GetTargetValue(int transition_number) {
+  Map* map = GetTarget(transition_number);
+  return map->instance_descriptors()->GetValue(map->LastAdded());
+}
+
+
 int TransitionArray::Search(Name* name) {
   if (IsSimpleTransition()) {
     Name* key = GetKey(kSimpleTransitionIndex);

src/transitions.h

@@ -48,6 +48,7 @@ class TransitionArray: public FixedArray {
   inline void SetTarget(int transition_number, Map* target);
 
   inline PropertyDetails GetTargetDetails(int transition_number);
+  inline Object* GetTargetValue(int transition_number);
 
   inline bool HasElementsTransition();
 
@@ -139,8 +140,11 @@ class TransitionArray: public FixedArray {
   static const int kTransitionSize = 2;
 
 #ifdef OBJECT_PRINT
+  // For our gdb macros, we should perhaps change these in the future.
+  void Print();
+
   // Print all the transitions.
-  void PrintTransitions(std::ostream& os);  // NOLINT
+  void PrintTransitions(std::ostream& os, bool print_header = true);  // NOLINT
 #endif
 
 #ifdef DEBUG

tools/gdbinit

@@ -20,6 +20,24 @@ Print a v8 Code object from an internal code address
 Usage: jco pc
 end
 
+# Print DescriptorArray.
+define jda
+print ((v8::internal::DescriptorArray*)($arg0))->Print()
+end
+document jda
+Print a v8 DescriptorArray object
+Usage: jda tagged_ptr
+end
+
+# Print TransitionArray.
+define jta
+print ((v8::internal::TransitionArray*)($arg0))->Print()
+end
+document jta
+Print a v8 TransitionArray object
+Usage: jta tagged_ptr
+end
+
 # Print JavaScript stack trace.
 define jst
 print v8::internal::Isolate::Current()->PrintStack(stdout)