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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Signal SIGSEGV in v8::internal::GlobalHandles::Create(v8::internal::Object*) ()","articleBody":"Hi!\r\n\r\nI've noticed some crashes sporadically occurring in v8 when calling the constructor of a class from the OnOK handler of `AsyncWorker`s. The crashes only seem to affect node 10.x (tested on 10.5, 10.13, 9.11.2). I'm running `node-addon-api` 1.6.0\r\n\r\n\r\n\u003cdetails\u003e\u003csummary\u003eStack trace: (gdb)\u003c/summary\u003e\r\n\u003cp\u003e\r\n\r\n```\r\nThread 1 \"node\" received signal SIGSEGV, Segmentation fault.\r\n0x0000000000e92f8b in v8::internal::GlobalHandles::Create(v8::internal::Object*) ()\r\n(gdb) bt\r\n#0  0x0000000000e92f8b in v8::internal::GlobalHandles::Create(v8::internal::Object*) ()\r\n#1  0x0000000000ad8138 in v8::V8::GlobalizeReference(v8::internal::Isolate*, v8::internal::Object**) ()\r\n#2  0x00000000008e62fd in (anonymous namespace)::v8impl::Reference::New(napi_env__*, v8::Local\u003cv8::Value\u003e, unsigned int, bool, void (*)(napi_env__*, void*, void*), void*, void*) ()\r\n#3  0x00000000008ee37f in napi_wrap ()\r\n#4  0x00007fffdfdf2d7e in Napi::ObjectWrap\u003cDarknetImage\u003e::ObjectWrap (this=0x2568890, callbackInfo=...) at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:2824\r\n#5  0x00007fffdfdf021a in DarknetImage::DarknetImage (this=0x2568890, info=...) at ../src/DarknetImage.cc:37\r\n#6  0x00007fffdfdf4954 in Napi::ObjectWrap\u003cDarknetImage\u003e::ConstructorCallbackWrapper(napi_env__*, napi_callback_info__*)::{lambda()#1}::operator()() const (__closure=0x7fffffff96b0)\r\n    at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:3221\r\n#7  0x00007fffdfdf51e7 in Napi::details::WrapCallback\u003cNapi::ObjectWrap\u003cDarknetImage\u003e::ConstructorCallbackWrapper(napi_env__*, napi_callback_info__*)::{lambda()#1}\u003e(Napi::ObjectWrap\u003cDarknetImage\u003e::ConstructorCallbackWrapper(napi_env__*, napi_callback_info__*)::{lambda()#1}) (callback=...) at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:104\r\n#8  0x00007fffdfdf4a85 in Napi::ObjectWrap\u003cDarknetImage\u003e::ConstructorCallbackWrapper (env=0x25f93a0, info=0x7fffffff9730) at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:3219\r\n#9  0x00000000008e6905 in (anonymous namespace)::v8impl::FunctionCallbackWrapper::Invoke(v8::FunctionCallbackInfo\u003cv8::Value\u003e const\u0026) ()\r\n#10 0x0000000000b5e71b in v8::internal::MaybeHandle\u003cv8::internal::Object\u003e v8::internal::(anonymous namespace)::HandleApiCallHelper\u003ctrue\u003e(v8::internal::Isolate*, v8::internal::Handle\u003cv8::internal::HeapObject\u003e, v8::internal::Handle\u003cv8::internal::HeapObject\u003e, v8::internal::Handle\u003cv8::internal::FunctionTemplateInfo\u003e, v8::internal::Handle\u003cv8::internal::Object\u003e, v8::internal::BuiltinArguments) ()\r\n#11 0x0000000000b60a7d in v8::internal::Builtins::InvokeApiFunction(v8::internal::Isolate*, bool, v8::internal::Handle\u003cv8::internal::HeapObject\u003e, v8::internal::Handle\u003cv8::internal::Object\u003e, int, v8::internal::Handle\u003cv8::internal::Object\u003e*, v8::internal::Handle\u003cv8::internal::HeapObject\u003e) ()\r\n#12 0x0000000000e702b1 in v8::internal::Execution::New(v8::internal::Isolate*, v8::internal::Handle\u003cv8::internal::Object\u003e, v8::internal::Handle\u003cv8::internal::Object\u003e, int, v8::internal::Handle\u003cv8::internal::Object\u003e*) ()\r\n#13 0x0000000000afc9e6 in v8::Function::NewInstanceWithSideEffectType(v8::Local\u003cv8::Context\u003e, int, v8::Local\u003cv8::Value\u003e*, v8::SideEffectType) const ()\r\n#14 0x0000000000afcd1c in v8::Function::NewInstance(v8::Local\u003cv8::Context\u003e, int, v8::Local\u003cv8::Value\u003e*) const ()\r\n#15 0x00000000008ef175 in napi_new_instance ()\r\n#16 0x00007fffdfde360c in Napi::Function::New (this=0x7fffffff9dc0, argc=4, args=0x7fffffff9ed0) at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:1747\r\n#17 0x00007fffdfde35b9 in Napi::Function::New (this=0x7fffffff9dc0, args=...) at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:1737\r\n#18 0x00007fffdfde4258 in Napi::FunctionReference::New (this=0x7fffdffff320 \u003cDarknetImage::constructor\u003e, args=...) at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:2521\r\n#19 0x00007fffdfdf1eab in DarknetImageWorkers::RGB2DarknetImage::OnOK (this=0x1c8519c0) at ../src/DarknetImage.h:108\r\n#20 0x00007fffdfde532d in Napi::AsyncWorker::OnWorkComplete(napi_env__*, napi_status, void*)::{lambda()#1}::operator()() const (__closure=0x7fffffff9fa8)\r\n    at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:3622\r\n#21 0x00007fffdfde6391 in Napi::details::WrapCallback\u003cNapi::AsyncWorker::OnWorkComplete(napi_env__*, napi_status, void*)::{lambda()#1}\u003e(Napi::AsyncWorker::OnWorkComplete(napi_env__*, napi_status, void*)::{lambda()#1}) (\r\n    callback=...) at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:104\r\n#22 0x00007fffdfde5435 in Napi::AsyncWorker::OnWorkComplete (status=napi_ok, this_pointer=0x1c8519c0) at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:3620\r\n#23 0x00000000008e6e4c in (anonymous namespace)::uvimpl::Work::AfterThreadPoolWork(int) ()\r\n#24 0x0000000000a42fb5 in uv__work_done (handle=0x24a3f50 \u003cdefault_loop_struct+176\u003e) at ../deps/uv/src/threadpool.c:313\r\n#25 0x0000000000a4732f in uv__async_io (loop=0x24a3ea0 \u003cdefault_loop_struct\u003e, w=\u003coptimized out\u003e, events=\u003coptimized out\u003e) at ../deps/uv/src/unix/async.c:118\r\n#26 0x0000000000a58018 in uv__io_poll (loop=loop@entry=0x24a3ea0 \u003cdefault_loop_struct\u003e, timeout=-1) at ../deps/uv/src/unix/linux-core.c:375\r\n#27 0x0000000000a47c6b in uv_run (loop=0x24a3ea0 \u003cdefault_loop_struct\u003e, mode=UV_RUN_DEFAULT) at ../deps/uv/src/unix/core.c:370\r\n#28 0x00000000008e5255 in node::Start(v8::Isolate*, node::IsolateData*, std::vector\u003cstd::string, std::allocator\u003cstd::string\u003e \u003e const\u0026, std::vector\u003cstd::string, std::allocator\u003cstd::string\u003e \u003e const\u0026) ()\r\n#29 0x00000000008e34a2 in node::Start(int, char**) ()\r\n#30 0x00007ffff6a96b97 in __libc_start_main (main=0x89dc10 \u003cmain\u003e, argc=2, argv=0x7fffffffe328, init=\u003coptimized out\u003e, fini=\u003coptimized out\u003e, rtld_fini=\u003coptimized out\u003e, stack_end=0x7fffffffe318) at ../csu/libc-start.c:310\r\n#31 0x000000000089dd45 in _start ()\r\n\r\n(gdb) frame 4\r\n#4  0x00007fffdfdf2d7e in Napi::ObjectWrap\u003cDarknetImage\u003e::ObjectWrap (this=0x2568890, callbackInfo=...) at /home/ubuntu/darknet-binding/node_modules/node-addon-api/napi-inl.h:2824\r\n2824\t  status = napi_wrap(env, wrapper, instance, FinalizeCallback, nullptr, \u0026ref);\r\n\r\n(gdb) info local\r\nenv = 0x25f93a0\r\nwrapper = 0x7fffffff9980\r\nstatus = napi_ok\r\nref = 0x25f93a0\r\ninstance = 0x2568890\r\ninstanceRef = 0x25f93a0\r\nenv = \u003coptimized out\u003e\r\nwrapper = \u003coptimized out\u003e\r\nstatus = \u003coptimized out\u003e\r\nref = \u003coptimized out\u003e\r\ninstance = \u003coptimized out\u003e\r\ninstanceRef = \u003coptimized out\u003e\r\n\r\n(gdb) info args\r\nthis = 0x2568890\r\ncallbackInfo = @0x7fffffff95b0: {_staticArgCount = 6, _env = 0x25f93a0, _info = 0x7fffffff9730, _this = 0x7fffffff9980, _argc = 4, _argv = 0x7fffffff95e0, _staticArgs = {0x7fffffff9978, 0x7fffffff9970, 0x7fffffff9968,\r\n    0x7fffffff9960, 0x24dd768, 0x24dd768}, _dynamicArgs = 0x0, _data = 0x0}\r\n(gdb)\r\n```\r\n\r\n\u003c/p\u003e\r\n\u003c/details\u003e\r\n\r\n\u003cbr/\u003e\r\n\r\nI've put together a list to the best of my knowledge resembling the code path from the stack trace:\r\n\r\nframe 4: https://github.com/nodejs/node-addon-api/blob/master/napi-inl.h#L2824\r\n\r\nframe 5: https://github.com/legraphista/darknet-binding/blob/089917035a5b188197a3f71b6f7bc2a87fa3604b/src/DarknetImage.cc#L37\r\n\r\nframe 19: https://github.com/legraphista/darknet-binding/blob/089917035a5b188197a3f71b6f7bc2a87fa3604b/src/DarknetImage.h#L102\r\n\r\nHas this happened to anyone else, or am I doing funky stuff i shouldn't be doing?\r\n\r\nThanks","author":{"url":"https://github.com/legraphista","@type":"Person","name":"legraphista"},"datePublished":"2018-11-09T12:17:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":19},"url":"https://github.com/393/node-addon-api/issues/393"}