Improve CPU Profile View

runtime/vm/profiler_test.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/assert.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
 #include "vm/globals.h"
 #include "vm/profiler.h"
@@ skipping 263 matching lines @@
                             allocation_extent_micros);
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have 1 allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Exclusive code: B.boo -> main.
     walker.Reset(Profile::kExclusiveCode);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT(!walker.Down());
 
     // Inclusive code: main -> B.boo.
     walker.Reset(Profile::kInclusiveCode);
     // Move down from the root.
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
 
     // Exclusive function: B.boo -> main.
     walker.Reset(Profile::kExclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT(!walker.Down());
 
     // Inclusive function: main -> B.boo.
     walker.Reset(Profile::kInclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 
   // Query with a time filter where no allocations occurred.
   {
     Thread* thread = Thread::Current();
     Isolate* isolate = thread->isolate();
     StackZone zone(thread);
     HANDLESCOPE(thread);
     Profile profile(isolate);
@@ skipping 64 matching lines @@
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Exclusive code: B.boo -> main.
     walker.Reset(Profile::kExclusiveCode);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT(!walker.Down());
 
     // Inclusive code: main -> B.boo.
     walker.Reset(Profile::kInclusiveCode);
     // Move down from the root.
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
 
     // Exclusive function: boo -> main.
     walker.Reset(Profile::kExclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT(!walker.Down());
 
     // Inclusive function: main -> boo.
     walker.Reset(Profile::kInclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 
   // Turn off allocation tracing for A.
   class_a.SetTraceAllocation(false);
 
   result = Dart_Invoke(lib, NewString("main"), 0, NULL);
   EXPECT_VALID(result);
 
   {
@@ skipping 69 matching lines @@
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have three allocation samples.
     EXPECT_EQ(3, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Exclusive code: B.boo -> main.
     walker.Reset(Profile::kExclusiveCode);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(3, walker.CurrentNodeTickCount());
     EXPECT_EQ(3, walker.CurrentInclusiveTicks());
     EXPECT_EQ(3, walker.CurrentExclusiveTicks());
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT_EQ(3, walker.CurrentNodeTickCount());
     EXPECT_EQ(3, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
     EXPECT(!walker.Down());
 
     // Inclusive code: main -> B.boo.
     walker.Reset(Profile::kInclusiveCode);
     // Move down from the root.
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT_EQ(3, walker.CurrentNodeTickCount());
     EXPECT_EQ(3, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(3, walker.CurrentNodeTickCount());
     EXPECT_EQ(3, walker.CurrentInclusiveTicks());
     EXPECT_EQ(3, walker.CurrentExclusiveTicks());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 }
 
 
 TEST_CASE(Profiler_FunctionTicks) {
   DisableNativeProfileScope dnps;
   const char* kScript =
       "class A {\n"
       "  var a;\n"
@@ skipping 51 matching lines @@
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have three allocation samples.
     EXPECT_EQ(3, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Exclusive function: B.boo -> main.
     walker.Reset(Profile::kExclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(3, walker.CurrentNodeTickCount());
     EXPECT_EQ(3, walker.CurrentInclusiveTicks());
     EXPECT_EQ(3, walker.CurrentExclusiveTicks());
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT_EQ(3, walker.CurrentNodeTickCount());
     EXPECT_EQ(3, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
     EXPECT(!walker.Down());
 
     // Inclusive function: main -> B.boo.
     walker.Reset(Profile::kInclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT_EQ(3, walker.CurrentNodeTickCount());
     EXPECT_EQ(3, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(3, walker.CurrentNodeTickCount());
     EXPECT_EQ(3, walker.CurrentInclusiveTicks());
     EXPECT_EQ(3, walker.CurrentExclusiveTicks());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 }
 
 
 TEST_CASE(Profiler_IntrinsicAllocation) {
   DisableNativeProfileScope dnps;
   const char* kScript = "double foo(double a, double b) => a + b;";
   Dart_Handle lib = TestCase::LoadTestScript(kScript, NULL);
   EXPECT_VALID(lib);
@@ skipping 29 matching lines @@
     HANDLESCOPE(thread);
     Profile profile(isolate);
     AllocationFilter filter(isolate, double_class.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
+    EXPECT_STREQ("Double_add", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("_Double._add", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("_Double.+", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("foo", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 
   double_class.SetTraceAllocation(false);
   result = Dart_Invoke(lib, NewString("foo"), 2, &args[0]);
@@ skipping 48 matching lines @@
     HANDLESCOPE(thread);
     Profile profile(isolate);
     AllocationFilter filter(isolate, array_class.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateArray", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("_List._List", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("List.List", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("foo", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 
   array_class.SetTraceAllocation(false);
   result = Dart_Invoke(lib, NewString("foo"), 0, NULL);
@@ skipping 28 matching lines @@
     HANDLESCOPE(thread);
     Profile profile(isolate);
     AllocationFilter filter(isolate, array_class.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should still only have one allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateArray", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("_List._List", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("_GrowableList._GrowableList", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("List.List", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("bar", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 }
@@ skipping 39 matching lines @@
     HANDLESCOPE(thread);
     Profile profile(isolate);
     AllocationFilter filter(isolate, context_class.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateContext", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("foo", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 
   context_class.SetTraceAllocation(false);
   result = Dart_Invoke(lib, NewString("foo"), 0, NULL);
   EXPECT_VALID(result);
 
   {
     StackZone zone(thread);
@@ skipping 44 matching lines @@
     Profile profile(isolate);
     AllocationFilter filter(isolate, closure_class.id());
     filter.set_enable_vm_ticks(true);
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
+    EXPECT_SUBSTRING("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_SUBSTRING("foo", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 
   // Disable allocation tracing for Closure.
   closure_class.SetTraceAllocation(false);
 
   // Invoke "bar" which during compilation, triggers a closure allocation.
   result = Dart_Invoke(lib, NewString("bar"), 0, NULL);
   EXPECT_VALID(result);
@@ skipping 51 matching lines @@
     HANDLESCOPE(thread);
     Profile profile(isolate);
     AllocationFilter filter(isolate, float32_list_class.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
+    EXPECT_STREQ("TypedData_Float32Array_new", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("Float32List.Float32List", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("foo", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 
   float32_list_class.SetTraceAllocation(false);
   result = Dart_Invoke(lib, NewString("foo"), 0, NULL);
   EXPECT_VALID(result);
 
@@ skipping 60 matching lines @@
     HANDLESCOPE(thread);
     Profile profile(isolate);
     AllocationFilter filter(isolate, one_byte_string_class.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should still only have one allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
+    EXPECT_STREQ("String_concat", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("_StringBase.+", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("foo", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 
   one_byte_string_class.SetTraceAllocation(false);
   result = Dart_Invoke(lib, NewString("foo"), 2, &args[0]);
   EXPECT_VALID(result);
 
@@ skipping 61 matching lines @@
     HANDLESCOPE(thread);
     Profile profile(isolate);
     AllocationFilter filter(isolate, one_byte_string_class.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should still only have one allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
+    EXPECT_STREQ("OneByteString_allocate", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("_OneByteString._allocate", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("_OneByteString._concatAll", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("_StringBase._interpolate", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("foo", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 
@@ skipping 99 matching lines @@
     HANDLESCOPE(thread);
     Profile profile(isolate);
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have 50,000 allocation samples.
     EXPECT_EQ(50000, profile.sample_count());
     ProfileTrieWalker walker(&profile);
     // We have two code objects: mainA and B.boo.
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(1, walker.SiblingCount());
     EXPECT_EQ(50000, walker.CurrentNodeTickCount());
     EXPECT_EQ(50000, walker.CurrentInclusiveTicks());
     EXPECT_EQ(50000, walker.CurrentExclusiveTicks());
     EXPECT(walker.Down());
     EXPECT_STREQ("mainA", walker.CurrentName());
     EXPECT_EQ(1, walker.SiblingCount());
     EXPECT_EQ(50000, walker.CurrentNodeTickCount());
     EXPECT_EQ(50000, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
     EXPECT(!walker.Down());
     // We have two code objects: mainA and B.boo.
     walker.Reset(Profile::kInclusiveCode);
     EXPECT(walker.Down());
     EXPECT_STREQ("mainA", walker.CurrentName());
     EXPECT_EQ(1, walker.SiblingCount());
     EXPECT_EQ(50000, walker.CurrentNodeTickCount());
     EXPECT_EQ(50000, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(1, walker.SiblingCount());
     EXPECT_EQ(50000, walker.CurrentNodeTickCount());
     EXPECT_EQ(50000, walker.CurrentInclusiveTicks());
     EXPECT_EQ(50000, walker.CurrentExclusiveTicks());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
 
     // Inline expansion should show us the complete call chain:
     // mainA -> B.boo -> B.foo -> B.choo.
     walker.Reset(Profile::kExclusiveFunction);
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.choo", walker.CurrentName());
     EXPECT_EQ(1, walker.SiblingCount());
     EXPECT_EQ(50000, walker.CurrentNodeTickCount());
     EXPECT_EQ(50000, walker.CurrentInclusiveTicks());
     EXPECT_EQ(50000, walker.CurrentExclusiveTicks());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.foo", walker.CurrentName());
     EXPECT_EQ(1, walker.SiblingCount());
     EXPECT_EQ(50000, walker.CurrentNodeTickCount());
     EXPECT_EQ(50000, walker.CurrentInclusiveTicks());
@@ skipping 32 matching lines @@
     EXPECT_EQ(1, walker.SiblingCount());
     EXPECT_EQ(50000, walker.CurrentNodeTickCount());
     EXPECT_EQ(50000, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.choo", walker.CurrentName());
     EXPECT_EQ(1, walker.SiblingCount());
     EXPECT_EQ(50000, walker.CurrentNodeTickCount());
     EXPECT_EQ(50000, walker.CurrentInclusiveTicks());
     EXPECT_EQ(50000, walker.CurrentExclusiveTicks());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 
   // Test code transition tags.
   {
     Thread* thread = Thread::Current();
     Isolate* isolate = thread->isolate();
     StackZone zone(thread);
     HANDLESCOPE(thread);
     Profile profile(isolate);
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread,
                   &filter,
                   Profile::kNoTags,
                   ProfilerService::kCodeTransitionTagsBit);
     // We should have 50,000 allocation samples.
     EXPECT_EQ(50000, profile.sample_count());
     ProfileTrieWalker walker(&profile);
     // We have two code objects: mainA and B.boo.
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("[Optimized Code]", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("mainA", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("[Unoptimized Code]", walker.CurrentName());
     EXPECT(!walker.Down());
     // We have two code objects: mainA and B.boo.
     walker.Reset(Profile::kInclusiveCode);
     EXPECT(walker.Down());
     EXPECT_STREQ("[Unoptimized Code]", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("mainA", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("[Optimized Code]", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
 
     // Inline expansion should show us the complete call chain:
     // mainA -> B.boo -> B.foo -> B.choo.
     walker.Reset(Profile::kExclusiveFunction);
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("[Inline End]", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.choo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.foo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("[Inline Start]", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT(walker.Down());
@@ skipping 16 matching lines @@
     EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("[Inline Start]", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.foo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.choo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("[Inline End]", walker.CurrentName());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 }
 
 
 TEST_CASE(Profiler_InliningIntervalBoundry) {
   // The PC of frames below the top frame is a call's return address,
   // which can belong to a different inlining interval than the call.
   // This test checks the profiler service takes this into account; see
   // ProfileBuilder::ProcessFrame.
@@ skipping 88 matching lines @@
     HANDLESCOPE(thread);
     Profile profile(isolate);
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Inline expansion should show us the complete call chain:
     walker.Reset(Profile::kExclusiveFunction);
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("maybeAlloc", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("right", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("a", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("mainAlloc", walker.CurrentName());
     EXPECT(!walker.Down());
 
     // Inline expansion should show us the complete call chain:
     walker.Reset(Profile::kInclusiveFunction);
     EXPECT(walker.Down());
     EXPECT_STREQ("mainAlloc", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("a", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("right", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("maybeAlloc", walker.CurrentName());
+    EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 }
 
 
 TEST_CASE(Profiler_ChainedSamples) {
   MaxProfileDepthScope mpds(32);
   DisableNativeProfileScope dnps;
 
   // Each sample holds 8 stack frames.
@@ skipping 51 matching lines @@
     Profile profile(isolate);
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have 1 allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     walker.Reset(Profile::kExclusiveCode);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("orange", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("napkin", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("mayo", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("lemon", walker.CurrentName());
     EXPECT(walker.Down());
@@ skipping 79 matching lines @@
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation samples.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Exclusive function: B.boo -> main.
     walker.Reset(Profile::kExclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(1, walker.CurrentExclusiveTicks());
     EXPECT_STREQ("A", walker.CurrentToken());
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
@@ skipping 70 matching lines @@
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation samples.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Exclusive function: B.boo -> main.
     walker.Reset(Profile::kExclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(1, walker.CurrentExclusiveTicks());
     EXPECT_STREQ("A", walker.CurrentToken());
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
@@ skipping 63 matching lines @@
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation samples.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Exclusive function: B.boo -> main.
     walker.Reset(Profile::kExclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(1, walker.CurrentExclusiveTicks());
     EXPECT_STREQ("A", walker.CurrentToken());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.oats", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
@@ skipping 101 matching lines @@
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation samples.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Exclusive function: B.boo -> main.
     walker.Reset(Profile::kExclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(1, walker.CurrentExclusiveTicks());
     EXPECT_STREQ("A", walker.CurrentToken());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.oats", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
@@ skipping 84 matching lines @@
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation samples.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Exclusive function: B.boo -> main.
     walker.Reset(Profile::kExclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(1, walker.CurrentExclusiveTicks());
     EXPECT_STREQ("A", walker.CurrentToken());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.oats", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
@@ skipping 110 matching lines @@
     AllocationFilter filter(isolate, class_a.id());
     profile.Build(thread, &filter, Profile::kNoTags);
     // We should have one allocation samples.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     // Exclusive function: B.boo -> main.
     walker.Reset(Profile::kExclusiveFunction);
     // Move down from the root.
     EXPECT(walker.Down());
+    EXPECT_STREQ("DRT_AllocateObject", walker.CurrentName());
+    EXPECT(walker.Down());
     EXPECT_STREQ("B.boo", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(1, walker.CurrentExclusiveTicks());
     EXPECT_STREQ("A", walker.CurrentToken());
     EXPECT(walker.Down());
     EXPECT_STREQ("B.oats", walker.CurrentName());
     EXPECT_EQ(1, walker.CurrentNodeTickCount());
     EXPECT_EQ(1, walker.CurrentInclusiveTicks());
     EXPECT_EQ(0, walker.CurrentExclusiveTicks());
@@ skipping 223 matching lines @@
   EXPECT_SUBSTRING("\"positions\":[\"TempMove\",39]", js.ToCString());
   // Verify exclusive ticks in main.
   EXPECT_SUBSTRING("\"exclusiveTicks\":[1,0]", js.ToCString());
   // Verify inclusive ticks in main.
   EXPECT_SUBSTRING("\"inclusiveTicks\":[1,2]", js.ToCString());
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart