Initial Timeline Events

runtime/vm/compiler.cc

Index: runtime/vm/compiler.cc
diff --git a/runtime/vm/compiler.cc b/runtime/vm/compiler.cc
index 05093ead27a22f6dcc501ef5b0ff15c373a0355c..d4065155ee2a4c558423d92bcca541500861626d 100644
--- a/runtime/vm/compiler.cc
+++ b/runtime/vm/compiler.cc
@@ -1071,7 +1071,18 @@ static RawError* CompileFunctionHelper(CompilationPipeline* pipeline,
 
 RawError* Compiler::CompileFunction(Thread* thread,
                                     const Function& function) {
-  VMTagScope tagScope(thread->isolate(), VMTag::kCompileUnoptimizedTagId);
+  Isolate* isolate = thread->isolate();
+  VMTagScope tagScope(isolate, VMTag::kCompileUnoptimizedTagId);
+  TimelineDurationScope tds(isolate,
+                            isolate->GetCompilerStream(),
+                            "CompileFunction");
+  if (tds.enabled()) {
+    tds.SetNumArguments(1);
+    tds.CopyArgument(
+        0,
+        "function",
+        const_cast<char*>(function.QualifiedUserVisibleNameCString()));
+  }
   CompilationPipeline* pipeline =
       CompilationPipeline::New(thread->zone(), function);
 
@@ -1116,7 +1127,18 @@ RawError* Compiler::EnsureUnoptimizedCode(Thread* thread,
 RawError* Compiler::CompileOptimizedFunction(Thread* thread,
                                              const Function& function,
                                              intptr_t osr_id) {
-  VMTagScope tagScope(thread->isolate(), VMTag::kCompileOptimizedTagId);
+  Isolate* isolate = thread->isolate();
+  VMTagScope tagScope(isolate, VMTag::kCompileOptimizedTagId);
+  TimelineDurationScope tds(isolate,
+                            isolate->GetCompilerStream(),
+                            "CompileOptimizedFunction");
+  if (tds.enabled()) {
+    tds.SetNumArguments(1);
+    tds.CopyArgument(
+        0,
+        "function",
+        const_cast<char*>(function.QualifiedUserVisibleNameCString()));
+  }
   CompilationPipeline* pipeline =
       CompilationPipeline::New(thread->zone(), function);
   return CompileFunctionHelper(pipeline, function, true, osr_id);