- Annotate instructions that load objects from the ObjectPool or Thread.

runtime/observatory/lib/src/cpu_profile/cpu_profile.dart

Index: runtime/observatory/lib/src/cpu_profile/cpu_profile.dart
diff --git a/runtime/observatory/lib/src/cpu_profile/cpu_profile.dart b/runtime/observatory/lib/src/cpu_profile/cpu_profile.dart
index c71a41ed77b47492aaec4acb0b287e8e30bbc68a..d3e0252d10cd1d23a640242f1edc3c3573940148 100644
--- a/runtime/observatory/lib/src/cpu_profile/cpu_profile.dart
+++ b/runtime/observatory/lib/src/cpu_profile/cpu_profile.dart
@@ -370,15 +370,22 @@ class ProfileCode {
 
     code.profile = this;
 
-    if (code.isDartCode) {
+    if (code.kind == CodeKind.Stub) {
+      attributes.add('stub');
+    } else if (code.kind == CodeKind.Dart) {
+      if (code.isNative) {
+        attributes.add('ffi');  // Not to be confused with a C function.
+      } else {
+        attributes.add('dart');
+      }
+      if (code.hasIntrinsic) {
+        attributes.add('intrinsic');
+      }
       if (code.isOptimized) {
         attributes.add('optimized');
       } else {
         attributes.add('unoptimized');
       }
-    }
-    if (code.isDartCode) {
-      attributes.add('dart');
     } else if (code.kind == CodeKind.Tag) {
       attributes.add('tag');
     } else if (code.kind == CodeKind.Native) {
@@ -516,15 +523,19 @@ class ProfileFunction {
     if (function.kind == FunctionKind.kTag) {
       attribs.add('tag');
     } else if (function.kind == FunctionKind.kStub) {
-      attribs.add('dart');
       attribs.add('stub');
     } else if (function.kind == FunctionKind.kNative) {
       attribs.add('native');
     } else if (function.kind.isSynthetic()) {
       attribs.add('synthetic');
+    } else if (function.isNative) {
+      attribs.add('ffi');  // Not to be confused with a C function.
     } else {
       attribs.add('dart');
     }
+    if (function.hasIntrinsic == true) {
+      attribs.add('intrinsic');
+    }
   }
 
   ProfileFunction.fromMap(this.profile, this.function, Map data) {