Implements remaining SecurityContext calls for iOS

runtime/bin/secure_socket_boringssl.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.
 
 #if !defined(DART_IO_DISABLED) && !defined(DART_IO_SECURE_SOCKET_DISABLED)
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_ANDROID) || \
     defined(TARGET_OS_LINUX)   || \
     defined(TARGET_OS_WINDOWS)
@@ skipping 103 matching lines @@
       reinterpret_cast<intptr_t*>(&filter)));
   return filter;
 }
 
 
 static void DeleteFilter(
     void* isolate_data,
     Dart_WeakPersistentHandle handle,
     void* context_pointer) {
   SSLFilter* filter = reinterpret_cast<SSLFilter*>(context_pointer);
-  delete filter;
+  filter->Release();
 }
 
 
 static Dart_Handle SetFilter(Dart_NativeArguments args, SSLFilter* filter) {
   ASSERT(filter != NULL);
   Dart_Handle dart_this = Dart_GetNativeArgument(args, 0);
   RETURN_IF_ERROR(dart_this);
   ASSERT(Dart_IsInstance(dart_this));
   Dart_Handle err = Dart_SetNativeInstanceField(
       dart_this,
@@ skipping 63 matching lines @@
 // Forward declaration.
 static void SetAlpnProtocolList(Dart_Handle protocols_handle,
                                 SSL* ssl,
                                 SSL_CTX* context,
                                 bool is_server);
 
 
 void FUNCTION_NAME(SecureSocket_Init)(Dart_NativeArguments args) {
   Dart_Handle dart_this = ThrowIfError(Dart_GetNativeArgument(args, 0));
   SSLFilter* filter = new SSLFilter();
+  filter->Retain();
   Dart_Handle err = SetFilter(args, filter);
   if (Dart_IsError(err)) {
-    delete filter;
+    filter->Release();
     Dart_PropagateError(err);
   }
   err = filter->Init(dart_this);
   if (Dart_IsError(err)) {
     // The finalizer was set up by SetFilter. It will delete `filter` if there
     // is an error.
     filter->Destroy();
     Dart_PropagateError(err);
   }
 }
@@ skipping 96 matching lines @@
 
 
 void FUNCTION_NAME(SecureSocket_PeerCertificate)
     (Dart_NativeArguments args) {
   Dart_Handle cert = ThrowIfError(GetFilter(args)->PeerCertificate());
   Dart_SetReturnValue(args, cert);
 }
 
 
 void FUNCTION_NAME(SecureSocket_FilterPointer)(Dart_NativeArguments args) {
-  intptr_t filter_pointer = reinterpret_cast<intptr_t>(GetFilter(args));
+  SSLFilter* filter = GetFilter(args);
+  // This filter pointer is passed to the IO Service thread. The IO Service
+  // thread must Release() the pointer when it is done with it.
+  filter->Retain();
+  intptr_t filter_pointer = reinterpret_cast<intptr_t>(filter);
   Dart_SetReturnValue(args, Dart_NewInteger(filter_pointer));
 }
 
 
 static void ReleaseCertificate(
     void* isolate_data,
     Dart_WeakPersistentHandle handle,
     void* context_pointer) {
   X509* cert = reinterpret_cast<X509*>(context_pointer);
   X509_free(cert);
@@ skipping 741 matching lines @@
  * write to the free space and end pointer of input buffers, and read from
  * the data space of output buffers, and modify the start pointer.
  *
  * When ProcessFilter returns, the Dart thread is responsible for combining
  * the updated pointers from Dart and C++, to make the new valid state of
  * the circular buffer.
  */
 CObject* SSLFilter::ProcessFilterRequest(const CObjectArray& request) {
   CObjectIntptr filter_object(request[0]);
   SSLFilter* filter = reinterpret_cast<SSLFilter*>(filter_object.Value());
+  RefCntReleaseScope<SSLFilter> rs(filter);
+
   bool in_handshake = CObjectBool(request[1]).Value();
   int starts[SSLFilter::kNumBuffers];
   int ends[SSLFilter::kNumBuffers];
   for (int i = 0; i < SSLFilter::kNumBuffers; ++i) {
     starts[i] = CObjectInt32(request[2 * i + 2]).Value();
     ends[i] = CObjectInt32(request[2 * i + 3]).Value();
   }
 
   if (filter->ProcessAllBuffers(starts, ends, in_handshake)) {
     CObjectArray* result = new CObjectArray(
@@ skipping 579 matching lines @@
   return bytes_processed;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)
 
 #endif  // !defined(DART_IO_DISABLED) &&
         // !defined(DART_IO_SECURE_SOCKET_DISABLED)