1 files changed, 23 insertions, 4 deletions
diff --git a/fpdfsdk/src/javascript/JS_Runtime.cpp b/fpdfsdk/src/javascript/JS_Runtime.cpp
index 4b4328c701..2ad5667b2e 100644
--- a/fpdfsdk/src/javascript/JS_Runtime.cpp
+++ b/fpdfsdk/src/javascript/JS_Runtime.cpp
@@ -93,17 +93,36 @@ void CJS_RuntimeFactory::ReleaseGlobalData()
 	}
 }
 
+void* CJS_ArrayBufferAllocator::Allocate(size_t length) {
+    return calloc(1, length);
+}
+
+void* CJS_ArrayBufferAllocator::AllocateUninitialized(size_t length) {
+    return malloc(length);
+}
+
+void CJS_ArrayBufferAllocator::Free(void* data, size_t length) {
+    free(data);
+}
+
 /* ------------------------------ CJS_Runtime ------------------------------ */
 extern v8::Persistent<v8::ObjectTemplate>& _getGlobalObjectTemplate(IJS_Runtime* pJSRuntime);
 CJS_Runtime::CJS_Runtime(CPDFDoc_Environment* pApp) :
 	m_pApp(pApp),
 	m_pDocument(NULL),
 	m_bBlocking(FALSE),
-	m_pFieldEventPath(NULL),
-	m_bRegistered(FALSE)
+	m_bRegistered(FALSE),
+	m_pFieldEventPath(NULL)
 {
-	m_isolate = FPDFXFA_GetApp()->GetJSERuntime()?(v8::Isolate*)FPDFXFA_GetApp()->GetJSERuntime():v8::Isolate::New();
-	//m_isolate->Enter();
+	if (FPDFXFA_GetApp()->GetJSERuntime()) {
+		m_isolate = (v8::Isolate*)FPDFXFA_GetApp()->GetJSERuntime();
+	} else {
+		m_pArrayBufferAllocator.reset(new CJS_ArrayBufferAllocator());
+		v8::Isolate::CreateParams params;
+		params.array_buffer_allocator = m_pArrayBufferAllocator.get();
+		m_isolate = v8::Isolate::New(params);
+	}
+
 	v8::Isolate* isolate = m_isolate;
 	v8::Isolate::Scope isolate_scope(isolate);
 	v8::Locker locker(isolate);