It might be, but normally I build my .so with the exact same custom libc++
which I use to build my android app. I am also able to perform other
operations on the object such as ->Get
On Thursday, September 12, 2019 at 4:16:00 PM UTC+3, Jakob Gruber wrote:
>
> Could this be another libcxx mismatch issue and 7.7 just exposes it
> incidentally?
>
> On Thu, Sep 12, 2019 at 2:54 PM Darin Dimitrov <darin....@gmail.com
> <javascript:>> wrote:
>
>> I am cross compiling V8 for android and I have created a shared library
>> containing a simple function which adds some property to a provided object:
>>
>> extern "C" void MyFunc(Isolate* isolate, Local<Object>& obj) {
>> Local<Context> context = isolate->GetCurrentContext();
>> obj->Set(context, v8::String::NewFromUtf8(isolate,
>> "someProp").ToLocalChecked(), Number::New(isolate, 500));
>> }
>>
>>
>> My goal purpose is to call this function from my android application in
>> which I have embedded V8:
>>
>>
>> typedef void (*MyCallback)(Isolate* isolate, Local<Object>& obj);
>>
>>
>> void* handle =
>> dlopen("/data/data/com.tns.testapplication/files/app/modules/libCalc-x86_64.so",
>> RTLD_LAZY);
>>
>> MyCallback func = reinterpret_cast<MyCallback>(dlsym(handle, "MyFunc"));
>> Local<Object> exportsObj = Object::New(isolate);
>> func(isolate, exportsObj);
>>
>>
>> This successfully invokes "MyFunc" from the shared library and sets the
>> "someProp" property on the passed object.
>>
>>
>> Starting from V8 *7.7.299.11* calling obj->Set() inside the library crashes
>> with SIGSEGV and without any stacktrace.
>>
>>
>> I have noticed that if I set the property before calling the function then
>> it works:
>>
>>
>> exportsObj->Set(context, v8::String::NewFromUtf8(isolate,
>> "someProp").ToLocalChecked(), v8::Null(isolate));
>> func(isolate, exportsObj);
>>
>>
>> Any idea what might have changed between the official V8 7.6 and 7.7
>> releases that might explain this behaviour or any tips that would allow me
>> to debug this further?
>>
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>>
>
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