[heap-stats] Log uncompiled JSFunctions

Change-Id: I9c64f70585592bb46e993041a275b989ea71489d
Reviewed-on: https://chromium-review.googlesource.com/897529
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51041}

src/heap/object-stats.cc

@@ -259,6 +259,7 @@ class ObjectStatsCollectorImpl {
   void RecordVirtualMapDetails(Map* map);
   void RecordVirtualScriptDetails(Script* script);
   void RecordVirtualSharedFunctionInfoDetails(SharedFunctionInfo* info);
+  void RecordVirtualJSFunctionDetails(JSFunction* function);
 
   Heap* heap_;
   ObjectStats* stats_;
@@ -441,6 +442,8 @@ void ObjectStatsCollectorImpl::CollectStatistics(HeapObject* obj, Phase phase) {
       } else if (obj->IsFunctionTemplateInfo()) {
         RecordVirtualFunctionTemplateInfoDetails(
             FunctionTemplateInfo::cast(obj));
+      } else if (obj->IsJSFunction()) {
+        RecordVirtualJSFunctionDetails(JSFunction::cast(obj));
       } else if (obj->IsJSGlobalObject()) {
         RecordVirtualJSGlobalObjectDetails(JSGlobalObject::cast(obj));
       } else if (obj->IsJSObject()) {
@@ -593,6 +596,15 @@ void ObjectStatsCollectorImpl::RecordVirtualSharedFunctionInfoDetails(
                            kIgnoreCow);
 }
 
+void ObjectStatsCollectorImpl::RecordVirtualJSFunctionDetails(
+    JSFunction* function) {
+  // Uncompiled JSFunctions get their own category.
+  if (!function->is_compiled()) {
+    RecordSimpleVirtualObjectStats(nullptr, function,
+                                   ObjectStats::UNCOMPILED_JS_FUNCTION_TYPE);
+  }
+}
+
 namespace {
 
 bool MatchesConstantElementsPair(Object* object) {

src/heap/object-stats.h

@@ -55,6 +55,7 @@
   V(SINGLE_CHARACTER_STRING_CACHE_TYPE)   \
   V(STRING_SPLIT_CACHE_TYPE)              \
   V(STRING_TABLE_TYPE)                    \
+  V(UNCOMPILED_JS_FUNCTION_TYPE)          \
   V(UNCOMPILED_SHARED_FUNCTION_INFO_TYPE) \
   V(WEAK_NEW_SPACE_OBJECT_TO_CODE_TYPE)
 

tools/heap-stats/categories.js

@@ -152,6 +152,7 @@ const CATEGORIES = new Map([
       'SCRIPT_TYPE',
       'SHARED_FUNCTION_INFO_TYPE',
       'STORE_HANDLER_TYPE',
+      'UNCOMPILED_JS_FUNCTION_TYPE',
       'UNCOMPILED_SHARED_FUNCTION_INFO_TYPE',
     ])
   ],