dart2js: add function coverage tracking in dart2js output, dumpinfo, and

pkg/compiler/lib/src/ssa/builder.dart

 // Copyright (c) 2012, 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.
 
 part of ssa;
 
 class SsaFunctionCompiler implements FunctionCompiler {
   final SsaCodeGeneratorTask generator;
   final SsaBuilderTask builder;
   final SsaOptimizerTask optimizer;
@@ skipping 1744 matching lines @@
       });
     }
     assert(argumentIndex == compiledArguments.length);
 
     elements = function.resolvedAst.elements;
     assert(elements != null);
     returnType = signature.type.returnType;
     stack = <HInstruction>[];
 
     insertTraceCall(function);
+    insertCoverageCall(function);
   }
 
   void restoreState(AstInliningState state) {
     localsHandler = state.oldLocalsHandler;
     returnLocal = state.oldReturnLocal;
     inTryStatement = state.inTryStatement;
     elements = state.oldElements;
     returnType = state.oldReturnType;
     assert(stack.isEmpty);
     stack = state.oldStack;
@@ skipping 618 matching lines @@
         localsHandler.directLocals[parameterElement] = newParameter;
       });
 
       returnType = signature.type.returnType;
     } else {
       // Otherwise it is a lazy initializer which does not have parameters.
       assert(element is VariableElement);
     }
 
     insertTraceCall(element);
+    insertCoverageCall(element);
   }
 
   insertTraceCall(Element element) {
-    if (JavaScriptBackend.TRACE_CALLS) {
+    if (JavaScriptBackend.TRACE_METHOD == 'console') {
       if (element == backend.traceHelper) return;
       n(e) => e == null ? '' : e.name;
       String name = "${n(element.library)}:${n(element.enclosingClass)}."
         "${n(element)}";
       HConstant nameConstant = addConstantString(name);
       add(new HInvokeStatic(backend.traceHelper,
                             <HInstruction>[nameConstant],
                             backend.dynamicType));
     }
   }
 
+  insertCoverageCall(Element element) {
+    if (JavaScriptBackend.TRACE_METHOD == 'post') {
+      if (element == backend.traceHelper) return;
+      // TODO(sigmund): create a better uuid for elements.
+      HConstant idConstant = graph.addConstantInt(element.hashCode, compiler);
+      HConstant nameConstant = addConstantString(element.name);
+      add(new HInvokeStatic(backend.traceHelper,
+                            <HInstruction>[idConstant, nameConstant],
+                            backend.dynamicType));
+    }
+  }
+
   /// Check that [type] is valid in the context of `localsHandler.contextClass`.
   /// This should only be called in assertions.
   bool assertTypeInContext(DartType type, [Spannable spannable]) {
     return invariant(spannable == null ? CURRENT_ELEMENT_SPANNABLE : spannable,
         () {
           ClassElement contextClass = Types.getClassContext(type);
           return contextClass == null ||
                  contextClass == localsHandler.contextClass;
         },
         message: "Type '$type' is not valid context of "
@@ skipping 6411 matching lines @@
     if (unaliased is TypedefType) throw 'unable to unalias $type';
     unaliased.accept(this, builder);
   }
 
   void visitDynamicType(DynamicType type, SsaBuilder builder) {
     JavaScriptBackend backend = builder.compiler.backend;
     ClassElement cls = backend.findHelper('DynamicRuntimeType');
     builder.push(new HDynamicType(type, new TypeMask.exact(cls, classWorld)));
   }
 }