Instrumentations to trace Swarm startup.

Source/WebCore/bindings/dart/DartApplicationLoader.cpp

Index: Source/WebCore/bindings/dart/DartApplicationLoader.cpp
diff --git a/Source/WebCore/bindings/dart/DartApplicationLoader.cpp b/Source/WebCore/bindings/dart/DartApplicationLoader.cpp
index edbf2f6a1412fa3fa87493cb17e88de94f58659f..a9df6551e0f9d157a0e57ba113a6b493a3dd7b4e 100644
--- a/Source/WebCore/bindings/dart/DartApplicationLoader.cpp
+++ b/Source/WebCore/bindings/dart/DartApplicationLoader.cpp
@@ -40,6 +40,7 @@
 #include "DartUtilities.h"
 #include "Document.h"
 #include "Frame.h"
+#include "InspectorInstrumentation.h"
 #include "ScriptCallStack.h"
 #include "ScriptSourceCode.h"
 
@@ -47,6 +48,22 @@
 
 namespace WebCore {
 
+class Timeline {
+public:
+    Timeline(DartApplicationLoader* loader, String tag)
+    {
+        m_cookie = InspectorInstrumentation::willEvaluateScript(loader->m_document->frame(), tag + "@"+ loader->m_libraryUrl, 0);
+    }
+
+    ~Timeline()
+    {
+        InspectorInstrumentation::didEvaluateScript(m_cookie);
+    }
+
+private:
+    InspectorInstrumentationCookie m_cookie;
+};
+
 DartApplicationLoader::DartApplicationLoader(Document* document)
     : m_document(document)
     , m_libraryUrl()
@@ -84,7 +101,7 @@ void DartApplicationLoader::load(const String& url, const String& source)
         CachedResourceLoader* loader = m_document->cachedResourceLoader();
         ResourceRequest request(m_document->completeURL(mainLibraryURL()));
         CachedScript* cachedScript = loader->requestScript(request, "utf-8");
-        if (cachedScript && !cachedScript->cachedMetadata(dartTypeID)) {
+        if (true && cachedScript && !cachedScript->cachedMetadata(dartTypeID)) {
             uint8_t* buffer;
             intptr_t size;
             Dart_Handle result = Dart_CreateScriptSnapshot(&buffer, &size);
@@ -95,6 +112,7 @@ void DartApplicationLoader::load(const String& url, const String& source)
                 // Consider other options like Dart_CompileAll.
                 return;
             }
+            printf("*** Creating a snapshot of size %d\n", size);
             cachedScript->setCachedMetadata(dartTypeID, reinterpret_cast<const char*>(buffer), size);
         }
 
@@ -177,6 +195,7 @@ void DartApplicationLoader::loadScript(const String& url, const String& source)
 
 void DartApplicationLoader::loadScriptFromSnapshot(const String& url, const uint8_t* snapshot)
 {
+    Timeline timeline(this, "loadSnapshot");
     ASSERT(m_importedLibraries.isEmpty());
     ASSERT(m_importersForSource.isEmpty());
     m_libraryUrl = url;
@@ -220,6 +239,7 @@ void DartApplicationLoader::loadLibrary(const String& url, const String& source)
 
 void DartApplicationLoader::callEntryPoint()
 {
+    Timeline timeline(this, "callEntryPoint");
     ASSERT(m_document->readyState() != "loading");
     Dart_Handle result = Dart_InvokeStatic(topLevelLibrary(), Dart_NewString(""), Dart_NewString("main"), 0, 0);
     if (Dart_IsError(result))
@@ -264,6 +284,7 @@ public:
             ScriptSourceCode sourceCode(m_cachedScript.get());
             DartIsolateState::Scope scope(m_isolate);
             CachedMetadata* cachedMetadata = m_cachedScript->cachedMetadata(dartTypeID);
+            printf("*** cachedMetadata: %p for %s\n", cachedMetadata, sourceCode.url().string().ascii().data());
             if (cachedMetadata)
                 m_loader->loadScriptFromSnapshot(sourceCode.url(), reinterpret_cast<const uint8_t*>(cachedMetadata->data()));
             else