There's a subtle but important difference between "value->IsEmpty()" and
"value.IsEmpty()" ;-)
On Thu, May 15, 2014 at 1:36 AM, Abhishek Kona <abhishek.k...@gmail.com>wrote:
> I have some v8 Code which tries to Parse JSON I get a SIGSEGV once in a
> while when I try to access the value. I am very confused about what is
> happening.
> Any help would be greatly appreciated.
>
> The code to Parse JSON is
>
> v8::Handle<v8::Value> FromJSONString(
> v8::Handle<v8::Value> json_string) {
> v8::HandleScope scope;
> v8::Handle<v8::Context> context = v8::Context::GetCurrent();
> v8::Handle<v8::Object> global = context->Global();
>
> v8::Handle<v8::Value> JSON_value = global->Get(v8::String::New("JSON"));
> if (!IsObject(JSON_value)) {
> return scope.Close(v8::Undefined());
> }
> v8::Handle<v8::Object> JSON = JSON_value->ToObject();
>
> v8::Handle<v8::Value> JSON_parse_value =
> JSON->Get(v8::String::New("parse"));
>
> if (JSON_parse_value.IsEmpty() || JSON_parse_value->IsNull() ||
> JSON_parse_value->IsUndefined() ||!JSON_parse_value->IsFunction()) {
> return scope.Close(v8::Undefined());
> }
>
>
> v8::Handle<v8::Function> JSON_parse =
> v8::Handle<v8::Function>::Cast(JSON_parse_value);
>
> return scope.Close(JSON_parse->Call(JSON, 1, &json_string));
> }
>
> And the code which calls this is at => For some reason accessing Value
> results in a SIGSEGV.
>
> bool extractSource(std::string* source, std::string& body) {
> v8::HandleScope scope; // this is needed and clears the memory
> if (body.empty()) {
> return false;
> }
> v8::Handle<v8::Value> value = v8_server_utils::FromJSONString(body);
> if (value->IsEmpty()) { // CRASHES HERE.
> return false;
> }
> if (value->IsNull()) {
> return false;
> }
> if (value->IsUndefined()) {
> return false;
> }
> if (!value->IsObject()) {
> return false;
> }
> auto object = value->ToObject();
> auto source_key = v8::String::New("source");
> if (object.IsEmpty() || object->IsNull() || object->IsUndefined() ||
> !object->Has(source_key)) {
> return false;
> }
> auto source_obj = object->Get(source_key);
> *source = v8_server_utils::JSStringToCString(source_obj->ToString());
> return true;
> }
>
>
>
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