如何解决Finalizer方法中执行JS代码崩溃问题
==========================

**问题现象**

崩溃的调用栈如下：

#00 pc 0000000001d2cfa8 /system/lib64/ndk/libjsvm.so(v8::base::OS::Abort()+28)
#01 pc 0000000001d21bfc /system/lib64/ndk/libjsvm.so(V8\_Fatal(char const\*, ...)+384)
#02 pc 000000000159ba30 /system/lib64/ndk/libjsvm.so(v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate\*, v8::internal::(anonymous namespace)::InvokeParams const&)+2952)
#03 pc 000000000159ae24 /system/lib64/ndk/libjsvm.so(v8::internal::Execution::Call(v8::internal::Isolate\*, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, int, v8::internal::Handle<v8::internal::Object>\*)+96)
#04 pc 0000000001432154 /system/lib64/ndk/libjsvm.so(v8::Function::Call(v8::Local<v8::Context>, v8::Local<v8::Value>, int, v8::Local<v8::Value>\*)+384)
#05 pc 0000000000c6e3e0 /system/lib64/ndk/libjsvm.so(OH\_JSVM\_CallFunction+348)
........
#24 pc 0000000000c77df8 /system/lib64/ndk/libjsvm.so(JSVM\_Env\_\_::CallFinalizer(void (\*)(JSVM\_Env\_\_\*, void\*, void\*), void\*, void\*)+96)
#25 pc 0000000000c65f5c /system/lib64/ndk/libjsvm.so(non-virtual thunk to v8impl::Reference::Finalize()+108)
#26 pc 0000000000c65fdc /system/lib64/ndk/libjsvm.so(v8impl::Reference::WeakCallback(v8::WeakCallbackInfo<v8impl::Reference> const&)+76)

**原因分析**

目前JSVM注册的Finalizer方法中禁止执行JS代码，在崩溃调用栈中，Finalizer方法调用了OH\_JSVM\_CallFunction执行了JS代码。

**解决措施**

在Finalizer中，仅清理与JS对象生命周期绑定的对象，不调用JSVM API。 若要在JS对象生命周期结束后执行一段JS代码，可在Finalizer方法中将相关代码的执行加入到外层事件循环队列中，等待下次事件循环时调用，从而实现时序上的顺序。