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async_wrap: fix use-after-free for inspector session

Rodrigo Muino Tomonari requested to merge github/fork/addaleax/async-inspector-use-after-free into master

This fixes the following condition:

valgrind output in the fold 
$ python -u tools/run-valgrind.py ./node_g test/sequential/test-inspector-async-call-stack.js
[...]
==10848== Invalid read of size 4
==10848==    at 0x12F509E: node::AsyncWrap::provider_type() const (async_wrap-inl.h:34)
==10848==    by 0x12E7642: node::AsyncWrap::EmitTraceEventAfter() (async_wrap.cc:208)
==10848==    by 0x12F301B: node::AsyncWrap::MakeCallback(v8::Local<v8::Function>, int, v8::Local<v8::Value>*) (async_wrap.cc:724)
==10848==    by 0x14516C6: node::inspector::(anonymous namespace)::JSBindingsConnection::OnMessage(v8::Local<v8::Value>) (inspector_js_api.cc:88)
==10848==    by 0x14514F1: node::inspector::(anonymous namespace)::JSBindingsConnection::JSBindingsSessionDelegate::SendMessageToFrontend(v8_inspector::StringView const&) (inspector_js_api.cc:57)
==10848==    by 0x14436AD: node::inspector::(anonymous namespace)::ChannelImpl::sendMessageToFrontend(v8_inspector::StringView const&) (inspector_agent.cc:232)
==10848==    by 0x1443627: node::inspector::(anonymous namespace)::ChannelImpl::sendResponse(int, std::unique_ptr<v8_inspector::StringBuffer, std::default_delete<v8_inspector::StringBuffer> >) (inspector_agent.cc:221)
==10848==    by 0x15C54EA: v8_inspector::V8InspectorSessionImpl::sendProtocolResponse(int, std::unique_ptr<v8_inspector::protocol::Serializable, std::default_delete<v8_inspector::protocol::Serializable> >) (v8-inspector-session-impl.cc:165)
==10848==    by 0x14C1E81: v8_inspector::protocol::DispatcherBase::sendResponse(int, v8_inspector::protocol::DispatchResponse const&, std::unique_ptr<v8_inspector::protocol::DictionaryValue, std::default_delete<v8_inspector::protocol::DictionaryValue> >) (Protocol.cpp:660)
==10848==    by 0x14C1F0A: v8_inspector::protocol::DispatcherBase::sendResponse(int, v8_inspector::protocol::DispatchResponse const&) (Protocol.cpp:665)
==10848==    by 0x14E68E3: v8_inspector::protocol::Debugger::DispatcherImpl::setAsyncCallStackDepth(int, std::unique_ptr<v8_inspector::protocol::DictionaryValue, std::default_delete<v8_inspector::protocol::DictionaryValue> >, v8_inspector::protocol::ErrorSupport*) (Debugger.cpp:1353)
==10848==    by 0x14E2D49: v8_inspector::protocol::Debugger::DispatcherImpl::dispatch(int, v8_inspector::String16 const&, std::unique_ptr<v8_inspector::protocol::DictionaryValue, std::default_delete<v8_inspector::protocol::DictionaryValue> >) (Debugger.cpp:920)
==10848==  Address 0x64e6f88 is 24 bytes inside a block of size 80 free'd
==10848==    at 0x4C3123B: operator delete(void*) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==10848==    by 0x14534F8: node::inspector::(anonymous namespace)::JSBindingsConnection::~JSBindingsConnection() (inspector_js_api.cc:34)
==10848==    by 0x145187E: node::inspector::(anonymous namespace)::JSBindingsConnection::Disconnect() (inspector_js_api.cc:111)
==10848==    by 0x14518C9: node::inspector::(anonymous namespace)::JSBindingsConnection::Disconnect(v8::FunctionCallbackInfo<v8::Value> const&) (inspector_js_api.cc:117)
==10848==    by 0x166FF87: v8::internal::FunctionCallbackArguments::Call(void (*)(v8::FunctionCallbackInfo<v8::Value> const&)) (api-arguments.cc:26)
==10848==    by 0x172F829: v8::internal::MaybeHandle<v8::internal::Object> v8::internal::(anonymous namespace)::HandleApiCallHelper<false>(v8::internal::Isolate*, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::FunctionTemplateInfo>, v8::internal::Handle<v8::internal::Object>, v8::internal::BuiltinArguments) (builtins-api.cc:112)
==10848==    by 0x172D85C: v8::internal::Builtin_Impl_HandleApiCall(v8::internal::BuiltinArguments, v8::internal::Isolate*) (builtins-api.cc:142)
==10848==    by 0x172D5F6: v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*) (builtins-api.cc:130)
==10848==    by 0x7895E1842C3: ???
==10848==    by 0x7895E19B737: ???
==10848==    by 0x7895E19B737: ???
==10848==    by 0x7895E18F9C2: ???
==10848==  Block was alloc'd at
==10848==    at 0x4C3017F: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==10848==    by 0x14517E8: node::inspector::(anonymous namespace)::JSBindingsConnection::New(v8::FunctionCallbackInfo<v8::Value> const&) (inspector_js_api.cc:103)
==10848==    by 0x166FF87: v8::internal::FunctionCallbackArguments::Call(void (*)(v8::FunctionCallbackInfo<v8::Value> const&)) (api-arguments.cc:26)
==10848==    by 0x172F113: v8::internal::MaybeHandle<v8::internal::Object> v8::internal::(anonymous namespace)::HandleApiCallHelper<true>(v8::internal::Isolate*, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::HeapObject>, v8::internal::Handle<v8::internal::FunctionTemplateInfo>, v8::internal::Handle<v8::internal::Object>, v8::internal::BuiltinArguments) (builtins-api.cc:112)
==10848==    by 0x172D748: v8::internal::Builtin_Impl_HandleApiCall(v8::internal::BuiltinArguments, v8::internal::Isolate*) (builtins-api.cc:138)
==10848==    by 0x172D5F6: v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*) (builtins-api.cc:130)
==10848==    by 0x7895E1842C3: ???
==10848==    by 0x7895E1930DC: ???
==10848==    by 0x7895E293EAA: ???
==10848==    by 0x7895E19B737: ???
==10848==    by 0x7895E19B737: ???
==10848==    by 0x7895E19B737: ???
[...]
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

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