Implement safepointing of threads

runtime/vm/parser.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 "vm/parser.h"
 #include "vm/flags.h"
 
 #ifndef DART_PRECOMPILED_RUNTIME
 
 #include "lib/invocation_mirror.h"
@@ skipping 12 matching lines @@
 #include "vm/isolate.h"
 #include "vm/longjump.h"
 #include "vm/native_arguments.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/os.h"
 #include "vm/regexp_assembler.h"
 #include "vm/report.h"
 #include "vm/resolver.h"
+#include "vm/safepoint.h"
 #include "vm/scanner.h"
 #include "vm/scopes.h"
 #include "vm/stack_frame.h"
 #include "vm/symbols.h"
 #include "vm/tags.h"
 #include "vm/timer.h"
 #include "vm/zone.h"
 
 namespace dart {
 
@@ skipping 5622 matching lines @@
       if (tag == Dart_kCanonicalizeUrl) {
         return url.raw();
       }
       return Object::null();
     }
     ReportError(token_pos, "no library handler registered");
   }
   // Block class finalization attempts when calling into the library
   // tag handler.
   I->BlockClassFinalization();
-  Api::Scope api_scope(T);
-  Dart_Handle result = handler(tag,
-                               Api::NewHandle(T, library_.raw()),
-                               Api::NewHandle(T, url.raw()));
+  Object& result = Object::Handle(Z);
+  {
+    TransitionVMToNative transition(T);
+    Api::Scope api_scope(T);
+    Dart_Handle retval = handler(tag,
+                                 Api::NewHandle(T, library_.raw()),
+                                 Api::NewHandle(T, url.raw()));
+    result = Api::UnwrapHandle(retval);
+  }
   I->UnblockClassFinalization();
-  if (Dart_IsError(result)) {
+  if (result.IsError()) {
     // In case of an error we append an explanatory error message to the
     // error obtained from the library tag handler.
-    Error& prev_error = Error::Handle(Z);
-    prev_error ^= Api::UnwrapHandle(result);
+    const Error& prev_error = Error::Cast(result);
     Report::LongJumpF(prev_error, script_, token_pos, "library handler failed");
   }
   if (tag == Dart_kCanonicalizeUrl) {
-    if (!Dart_IsString(result)) {
+    if (!result.IsString()) {
       ReportError(token_pos, "library handler failed URI canonicalization");
     }
   }
-  return Api::UnwrapHandle(result);
+  return result.raw();
 }
 
 
 void Parser::ParseLibraryName() {
   ASSERT(CurrentToken() == Token::kLIBRARY);
   ConsumeToken();
   String& lib_name = *ExpectIdentifier("library name expected");
   if (CurrentToken() == Token::kPERIOD) {
     GrowableHandlePtrArray<const String> pieces(Z, 3);
     pieces.Add(lib_name);
@@ skipping 8651 matching lines @@
     const ArgumentListNode& function_args,
     const LocalVariable* temp_for_last_arg,
     bool is_super_invocation) {
   UNREACHABLE();
   return NULL;
 }
 
 }  // namespace dart
 
 #endif  // DART_PRECOMPILED_RUNTIME