Segv when PDF-side JS object property getter invoked from XFA.

fpdfsdk/include/jsapi/fxjs_v8.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 // FXJS_V8 is a layer that makes it easier to define native objects in V8, but
 // has no knowledge of PDF-specific native objects. It could in theory be used
 // to implement other sets of native objects.
 
@@ skipping 111 matching lines @@
 void FXJS_DefineGlobalConst(v8::Isolate* pIsolate,
                             const wchar_t* sConstName,
                             v8::Local<v8::Value> pDefault);
 
 // Called after FXJS_Define* calls made.
 void FXJS_InitializeRuntime(v8::Isolate* pIsolate,
                             IJS_Runtime* pIRuntime,
                             v8::Global<v8::Context>& v8PersistentContext);
 void FXJS_ReleaseRuntime(v8::Isolate* pIsolate,
                          v8::Global<v8::Context>& v8PersistentContext);
-IJS_Runtime* FXJS_GetRuntimeFromIsolate(v8::Isolate* pIsolate);
+
+// Called as part of FXJS_InitializeRuntime, exposed so PDF can make its
+// own contexts compatible with XFA or vice versa.
+void FXJS_SetRuntimeForV8Context(v8::Local<v8::Context> v8Context,
+                                 IJS_Runtime* pIRuntime);
+
+IJS_Runtime* FXJS_GetRuntimeFromV8Context(v8::Local<v8::Context> v8Context);
 
 // Called after FXJS_InitializeRuntime call made.
 int FXJS_Execute(v8::Isolate* pIsolate,
                  IJS_Context* pJSContext,
                  const wchar_t* script,
                  FXJSErr* perror);
 
 v8::Local<v8::Object> FXJS_NewFxDynamicObj(v8::Isolate* pIsolate,
                                            IJS_Runtime* pJSContext,
                                            int nObjDefnID);
@@ skipping 75 matching lines @@
 double FXJS_ToNumber(v8::Isolate* pIsolate, v8::Local<v8::Value> pValue);
 v8::Local<v8::Object> FXJS_ToObject(v8::Isolate* pIsolate,
                                     v8::Local<v8::Value> pValue);
 CFX_WideString FXJS_ToString(v8::Isolate* pIsolate,
                              v8::Local<v8::Value> pValue);
 v8::Local<v8::Array> FXJS_ToArray(v8::Isolate* pIsolate,
                                   v8::Local<v8::Value> pValue);
 void FXJS_ValueCopy(v8::Local<v8::Value>& pTo, v8::Local<v8::Value> pFrom);
 
 #endif  // FPDFSDK_INCLUDE_JSAPI_FXJS_V8_H_