- Add --trace-loading to trace resolution and loading.

runtime/bin/dartutils.cc

 // 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.
 
 #include "bin/dartutils.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
@@ skipping 606 matching lines @@
   } else {
     Dart_Handle err = DartUtils::NewError("Failed to get current directory.");
     Dart_PropagateError(err);
   }
 }
 
 
 void DartUtils::PrepareBuiltinLibrary(Dart_Handle builtin_lib,
                                       Dart_Handle internal_lib,
                                       bool is_service_isolate,
+                                      bool trace_loading,
                                       const char* package_root) {
   // Setup the internal library's 'internalPrint' function.
   Dart_Handle print = Dart_Invoke(
       builtin_lib, NewString("_getPrintClosure"), 0, NULL);
   DART_CHECK_VALID(print);
   Dart_Handle result =
       Dart_SetField(internal_lib, NewString("_printClosure"), print);
   DART_CHECK_VALID(result);
 
   if (!is_service_isolate) {
-    result =
-        Dart_SetField(builtin_lib, NewString("_isWindows"),
-                      IsWindowsHost() ? Dart_True() : Dart_False());
-    DART_CHECK_VALID(result);
+    if (IsWindowsHost()) {
+      result = Dart_SetField(builtin_lib, NewString("_isWindows"), Dart_True());
+      DART_CHECK_VALID(result);
+    }
+    if (trace_loading) {
+      result = Dart_SetField(builtin_lib,
+                             NewString("_traceLoading"), Dart_True());
+      DART_CHECK_VALID(result);
+    }
   }
 
   if (!is_service_isolate) {
     // Set current working directory.
     result = SetWorkingDirectory(builtin_lib);
     DART_CHECK_VALID(result);
   }
 
   // Set up package root if specified.
   if (package_root != NULL) {
@@ skipping 44 matching lines @@
 }
 
 
 void DartUtils::PrepareIsolateLibrary(Dart_Handle isolate_lib) {
   DART_CHECK_VALID(Dart_Invoke(isolate_lib, NewString("_setupHooks"), 0, NULL));
 }
 
 
 Dart_Handle DartUtils::PrepareForScriptLoading(const char* package_root,
                                                bool is_service_isolate,
+                                               bool trace_loading,
                                                Dart_Handle builtin_lib) {
   // First ensure all required libraries are available.
   Dart_Handle url = NewString(kCoreLibURL);
   DART_CHECK_VALID(url);
   Dart_Handle core_lib = Dart_LookupLibrary(url);
   DART_CHECK_VALID(core_lib);
   url = NewString(kAsyncLibURL);
   DART_CHECK_VALID(url);
   Dart_Handle async_lib = Dart_LookupLibrary(url);
   DART_CHECK_VALID(async_lib);
   url = NewString(kIsolateLibURL);
   DART_CHECK_VALID(url);
   Dart_Handle isolate_lib = Dart_LookupLibrary(url);
   DART_CHECK_VALID(isolate_lib);
   url = NewString(kInternalLibURL);
   DART_CHECK_VALID(url);
   Dart_Handle internal_lib = Dart_LookupLibrary(url);
   DART_CHECK_VALID(internal_lib);
   Dart_Handle io_lib = Builtin::LoadAndCheckLibrary(Builtin::kIOLibrary);
   DART_CHECK_VALID(io_lib);
 
   // We need to ensure that all the scripts loaded so far are finalized
   // as we are about to invoke some Dart code below to setup closures.
   Dart_Handle result = Dart_FinalizeLoading(false);
   DART_CHECK_VALID(result);
 
   PrepareBuiltinLibrary(builtin_lib,
                         internal_lib,
                         is_service_isolate,
+                        trace_loading,
                         package_root);
   PrepareAsyncLibrary(async_lib, isolate_lib);
   PrepareCoreLibrary(core_lib, builtin_lib, is_service_isolate);
   PrepareIsolateLibrary(isolate_lib);
   PrepareIOLibrary(io_lib);
   return result;
 }
 
 
 void DartUtils::SetupIOLibrary(const char* script_uri) {
@@ skipping 451 matching lines @@
       new CObjectString(CObject::NewString(os_error->message()));
   CObjectArray* result = new CObjectArray(CObject::NewArray(3));
   result->SetAt(0, new CObjectInt32(CObject::NewInt32(kOSError)));
   result->SetAt(1, new CObjectInt32(CObject::NewInt32(os_error->code())));
   result->SetAt(2, error_message);
   return result;
 }
 
 }  // namespace bin
 }  // namespace dart