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Commit 5533681

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trevnorrisMyles Borins
trevnorris
authored and
Myles Borins
committed
async_wrap: call callback in destructor
Call a user's callback to notify that the handle has been destroyed. Only pass the id of the AsyncWrap instance since the object no longer exists. The object that's being destructed should never be inspected within the callback or any time afterward. This commit make a breaking change. The init callback will now be passed arguments in the order of provider, id, parent. PR-URL: #3461 Reviewed-By: Fedor Indutny <fedor@indutny.com>
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‎src/async-wrap-inl.h‎

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+18-1Lines changed: 18 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -41,11 +41,12 @@ inline AsyncWrap::AsyncWrap(Environment* env,
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v8::Local<v8::Value> argv[] = {
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v8::Int32::New(env->isolate(), provider),
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v8::Integer::New(env->isolate(), get_uid()),
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Null(env->isolate())
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};
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if (parent != nullptr)
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argv[1] = parent->object();
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argv[2] = parent->object();
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v8::MaybeLocal<v8::Value> ret =
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init_fn->Call(env->context(), object, ARRAY_SIZE(argv), argv);
@@ -57,6 +58,22 @@ inline AsyncWrap::AsyncWrap(Environment* env,
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}
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inline AsyncWrap::~AsyncWrap() {
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if (!ran_init_callback())
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return;
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v8::Local<v8::Function> fn = env()->async_hooks_destroy_function();
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if (!fn.IsEmpty()) {
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v8::HandleScope scope(env()->isolate());
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v8::Local<v8::Value> uid = v8::Integer::New(env()->isolate(), get_uid());
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v8::MaybeLocal<v8::Value> ret =
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fn->Call(env()->context(), v8::Null(env()->isolate()), 1, &uid);
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if (ret.IsEmpty())
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FatalError("node::AsyncWrap::~AsyncWrap", "destroy hook threw");
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}
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}
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inline bool AsyncWrap::ran_init_callback() const {
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return static_cast<bool>(bits_ & 1);
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}
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‎src/async-wrap.cc‎

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+3Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -131,6 +131,8 @@ static void SetupHooks(const FunctionCallbackInfo<Value>& args) {
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env->set_async_hooks_pre_function(args[1].As<Function>());
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if (args[2]->IsFunction())
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env->set_async_hooks_post_function(args[2].As<Function>());
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if (args[3]->IsFunction())
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env->set_async_hooks_destroy_function(args[3].As<Function>());
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}
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@@ -156,6 +158,7 @@ static void Initialize(Local<Object> target,
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env->set_async_hooks_init_function(Local<Function>());
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env->set_async_hooks_pre_function(Local<Function>());
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env->set_async_hooks_post_function(Local<Function>());
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env->set_async_hooks_destroy_function(Local<Function>());
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}
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‎src/async-wrap.h‎

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+1-1Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -51,7 +51,7 @@ class AsyncWrap : public BaseObject {
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ProviderType provider,
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AsyncWrap* parent = nullptr);
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inline virtual ~AsyncWrap() override = default;
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inline virtual ~AsyncWrap();
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inline ProviderType provider_type() const;
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‎src/env.h‎

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+1Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -231,6 +231,7 @@ namespace node {
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V(async_hooks_init_function, v8::Function) \
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V(async_hooks_pre_function, v8::Function) \
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V(async_hooks_post_function, v8::Function) \
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V(async_hooks_destroy_function, v8::Function) \
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V(binding_cache_object, v8::Object) \
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V(buffer_constructor_function, v8::Function) \
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V(buffer_prototype_object, v8::Object) \
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‎test/parallel/test-async-wrap-disabled-propagate-parent.js‎

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+1-1Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -10,7 +10,7 @@ let cntr = 0;
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let server;
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let client;
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function init(type, parent) {
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function init(type, id, parent) {
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if (parent) {
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cntr++;
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// Cannot assert in init callback or will abort.
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‎test/parallel/test-async-wrap-propagate-parent.js‎

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+1-1Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -9,7 +9,7 @@ let cntr = 0;
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let server;
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let client;
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function init(type, parent) {
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function init(type, id, parent) {
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if (parent) {
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cntr++;
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// Cannot assert in init callback or will abort.

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