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fix: free event targets properties by gc mark. #929

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merged 2 commits into from Dec 6, 2021
Merged

fix: free event targets properties by gc mark. #929

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1964cc8
fix: free event targets properties by gc mark.
andycall Nov 30, 2021
00d3d0f
fix: use Object.defineProperty to define object's properties.
andycall Nov 30, 2021
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4 changes: 1 addition & 3 deletions bridge/bindings/qjs/bom/window.cc
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Expand Up @@ -103,7 +103,7 @@ PROP_GETTER(Window, __location__)(QjsContext* ctx, JSValue this_val, int argc, J
auto* window = static_cast<WindowInstance*>(JS_GetOpaque(this_val, 1));
if (window == nullptr)
return JS_UNDEFINED;
return JS_DupValue(ctx, window->m_location->jsObject);
return JS_DupValue(ctx, window->m_location.value());
}
PROP_SETTER(Window, __location__)(QjsContext* ctx, JSValue this_val, int argc, JSValue* argv) {
return JS_NULL;
Expand Down Expand Up @@ -183,8 +183,6 @@ void WindowInstance::gcMark(JSRuntime* rt, JSValue val, JS_MarkFunc* mark_func)
EventTargetInstance::gcMark(rt, val, mark_func);

// Should check object is already inited before gc mark.
if (JS_IsObject(m_location->jsObject))
JS_MarkValue(rt, m_location->jsObject, mark_func);
if (JS_IsObject(onerror))
JS_MarkValue(rt, onerror, mark_func);
}
Expand Down
5 changes: 3 additions & 2 deletions bridge/bindings/qjs/bom/window.h
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Expand Up @@ -47,12 +47,13 @@ class WindowInstance : public EventTargetInstance {
public:
WindowInstance() = delete;
explicit WindowInstance(Window* window);
~WindowInstance() { JS_FreeValue(m_ctx, onerror); }
~WindowInstance() {}

private:
void gcMark(JSRuntime* rt, JSValue val, JS_MarkFunc* mark_func) override;

Location* m_location{new Location(m_context)};
ObjectProperty m_location{m_context, instanceObject, "m_location", (new Location(m_context))->jsObject};
ObjectProperty m_onerror{m_context, instanceObject, "m_onerror", JS_NULL};
JSValue onerror{JS_NULL};
friend Window;
friend JSContext;
Expand Down
65 changes: 26 additions & 39 deletions bridge/bindings/qjs/dom/event_target.cc
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Expand Up @@ -69,18 +69,18 @@ JSValue EventTarget::addEventListener(QjsContext* ctx, JSValue this_val, int arg
JSAtom eventTypeAtom = JS_ValueToAtom(ctx, eventTypeValue);

// Init list.
if (!JS_HasProperty(ctx, eventTargetInstance->m_eventHandlers, eventTypeAtom)) {
if (!JS_HasProperty(ctx, eventTargetInstance->m_eventHandlers.value(), eventTypeAtom)) {
JS_DupAtom(ctx, eventTypeAtom);
auto* atomJob = new AtomJob{eventTypeAtom};
list_add_tail(&atomJob->link, &eventTargetInstance->m_context->atom_job_list);
JS_SetProperty(ctx, eventTargetInstance->m_eventHandlers, eventTypeAtom, JS_NewArray(ctx));
JS_SetProperty(ctx, eventTargetInstance->m_eventHandlers.value(), eventTypeAtom, JS_NewArray(ctx));
}

JSValue eventHandlers = JS_GetProperty(ctx, eventTargetInstance->m_eventHandlers, eventTypeAtom);
JSValue eventHandlers = JS_GetProperty(ctx, eventTargetInstance->m_eventHandlers.value(), eventTypeAtom);
int32_t eventHandlerLen = arrayGetLength(ctx, eventHandlers);

// Dart needs to be notified for the first registration event.
if (eventHandlerLen == 0 || JS_HasProperty(ctx, eventTargetInstance->m_propertyEventHandler, eventTypeAtom)) {
if (eventHandlerLen == 0 || JS_HasProperty(ctx, eventTargetInstance->m_propertyEventHandler.value(), eventTypeAtom)) {
int32_t contextId = eventTargetInstance->prototype()->contextId();

NativeString args_01{};
Expand Down Expand Up @@ -114,12 +114,12 @@ JSValue EventTarget::removeEventListener(QjsContext* ctx, JSValue this_val, int

JSAtom eventTypeAtom = JS_ValueToAtom(ctx, eventTypeValue);

if (!JS_HasProperty(ctx, eventTargetInstance->m_eventHandlers, eventTypeAtom)) {
if (!JS_HasProperty(ctx, eventTargetInstance->m_eventHandlers.value(), eventTypeAtom)) {
JS_FreeAtom(ctx, eventTypeAtom);
return JS_UNDEFINED;
}

JSValue eventHandlers = JS_GetProperty(ctx, eventTargetInstance->m_eventHandlers, eventTypeAtom);
JSValue eventHandlers = JS_GetProperty(ctx, eventTargetInstance->m_eventHandlers.value(), eventTypeAtom);
int32_t targetIdx = arrayFindIdx(ctx, eventHandlers, callback);

if (targetIdx != -1) {
Expand All @@ -128,7 +128,7 @@ JSValue EventTarget::removeEventListener(QjsContext* ctx, JSValue this_val, int

int32_t eventHandlersLen = arrayGetLength(ctx, eventHandlers);

if (eventHandlersLen && JS_HasProperty(ctx, eventTargetInstance->m_propertyEventHandler, eventTypeAtom)) {
if (eventHandlersLen && JS_HasProperty(ctx, eventTargetInstance->m_propertyEventHandler.value(), eventTypeAtom)) {
// Dart needs to be notified for handles is empty.
int32_t contextId = eventTargetInstance->prototype()->contextId();

Expand Down Expand Up @@ -207,8 +207,8 @@ bool EventTargetInstance::internalDispatchEvent(EventInstance* eventInstance) {
JS_FreeValue(m_ctx, returnedValue);
};

if (JS_HasProperty(m_ctx, m_eventHandlers, eventTypeAtom)) {
JSValue eventHandlers = JS_GetProperty(m_ctx, m_eventHandlers, eventTypeAtom);
if (JS_HasProperty(m_ctx, m_eventHandlers.value(), eventTypeAtom)) {
JSValue eventHandlers = JS_GetProperty(m_ctx, m_eventHandlers.value(), eventTypeAtom);
int32_t len = arrayGetLength(m_ctx, eventHandlers);

for (int i = 0; i < len; i++) {
Expand All @@ -221,7 +221,7 @@ bool EventTargetInstance::internalDispatchEvent(EventInstance* eventInstance) {
}

// Dispatch event listener white by 'on' prefix property.
if (JS_HasProperty(m_ctx, m_propertyEventHandler, eventTypeAtom)) {
if (JS_HasProperty(m_ctx, m_propertyEventHandler.value(), eventTypeAtom)) {
if (eventType == "error") {
auto _dispatchErrorEvent = [&eventInstance, this, eventType](JSValue& handler) {
JSValue error = JS_GetPropertyStr(m_ctx, eventInstance->instanceObject, "error");
Expand All @@ -240,11 +240,11 @@ bool EventTargetInstance::internalDispatchEvent(EventInstance* eventInstance) {
JS_FreeValue(m_ctx, lineNumberValue);
JS_FreeValue(m_ctx, columnValue);
};
JSValue v = JS_GetProperty(m_ctx, m_propertyEventHandler, eventTypeAtom);
JSValue v = JS_GetProperty(m_ctx, m_propertyEventHandler.value(), eventTypeAtom);
_dispatchErrorEvent(v);
JS_FreeValue(m_ctx, v);
} else {
JSValue v = JS_GetProperty(m_ctx, m_propertyEventHandler, eventTypeAtom);
JSValue v = JS_GetProperty(m_ctx, m_propertyEventHandler.value(), eventTypeAtom);
_dispatchEvent(v);
JS_FreeValue(m_ctx, v);
}
Expand Down Expand Up @@ -285,9 +285,6 @@ EventTargetInstance::~EventTargetInstance() {
#if FLUTTER_BACKEND
getDartMethod()->flushUICommand();
#endif
JS_FreeValue(m_ctx, m_properties);
JS_FreeValue(m_ctx, m_eventHandlers);
JS_FreeValue(m_ctx, m_propertyEventHandler);
}

int EventTargetInstance::hasProperty(QjsContext* ctx, JSValue obj, JSAtom atom) {
Expand All @@ -306,7 +303,7 @@ int EventTargetInstance::hasProperty(QjsContext* ctx, JSValue obj, JSAtom atom)
return !JS_IsNull(eventTarget->getPropertyHandler(p));
}

return JS_HasProperty(ctx, eventTarget->m_properties, atom);
return JS_HasProperty(ctx, eventTarget->m_properties.value(), atom);
}

JSValue EventTargetInstance::getProperty(QjsContext* ctx, JSValue obj, JSAtom atom, JSValue receiver) {
Expand All @@ -328,8 +325,8 @@ JSValue EventTargetInstance::getProperty(QjsContext* ctx, JSValue obj, JSAtom at
return eventTarget->getPropertyHandler(p);
}

if (JS_HasProperty(ctx, eventTarget->m_properties, atom)) {
return JS_GetProperty(ctx, eventTarget->m_properties, atom);
if (JS_HasProperty(ctx, eventTarget->m_properties.value(), atom)) {
return JS_GetProperty(ctx, eventTarget->m_properties.value(), atom);
}

// For plugin elements, try to auto generate properties and functions from dart response.
Expand Down Expand Up @@ -357,14 +354,14 @@ int EventTargetInstance::setProperty(QjsContext* ctx, JSValue obj, JSAtom atom,
if (!p->is_wide_char && p->u.str8[0] == 'o' && p->u.str8[1] == 'n') {
eventTarget->setPropertyHandler(p, value);
} else {
if (!JS_HasProperty(ctx, eventTarget->m_properties, atom)) {
if (!JS_HasProperty(ctx, eventTarget->m_properties.value(), atom)) {
auto* atomJob = new AtomJob{atom};
list_add_tail(&atomJob->link, &eventTarget->m_context->atom_job_list);
// Increase one reference count for atom to hold this atom value until eventTarget disposed.
JS_DupAtom(ctx, atom);
}

JS_SetProperty(ctx, eventTarget->m_properties, atom, JS_DupValue(ctx, value));
JS_SetProperty(ctx, eventTarget->m_properties.value(), atom, JS_DupValue(ctx, value));

if (isJavaScriptExtensionElementInstance(eventTarget->context(), eventTarget->instanceObject) && !p->is_wide_char && p->u.str8[0] != '_') {
NativeString* args_01 = atomToNativeString(ctx, atom);
Expand Down Expand Up @@ -409,7 +406,7 @@ void EventTargetInstance::setPropertyHandler(JSString* p, JSValue value) {
if (JS_IsNull(value)) {
JS_FreeAtom(m_ctx, atom);
list_del(&atomJob->link);
JS_DeleteProperty(m_ctx, m_propertyEventHandler, atom, 0);
JS_DeleteProperty(m_ctx, m_propertyEventHandler.value(), atom, 0);
return;
}

Expand All @@ -420,9 +417,8 @@ void EventTargetInstance::setPropertyHandler(JSString* p, JSValue value) {
}

JSValue newCallback = JS_DupValue(m_ctx, value);
JS_SetProperty(m_ctx, m_propertyEventHandler, atom, newCallback);

int32_t eventHandlerLen = arrayGetLength(m_ctx, m_eventHandlers);
JS_SetProperty(m_ctx, m_propertyEventHandler.value(), atom, newCallback);
int32_t eventHandlerLen = arrayGetLength(m_ctx, m_eventHandlers.value());
if (eventHandlerLen == 0) {
int32_t contextId = m_context->getContextId();
NativeString* args_01 = atomToNativeString(m_ctx, atom);
Expand All @@ -435,10 +431,10 @@ JSValue EventTargetInstance::getPropertyHandler(JSString* p) {
char eventType[p->len + 1 - 2];
memcpy(eventType, &p->u.str8[2], p->len + 1 - 2);
JSAtom atom = JS_NewAtom(m_ctx, eventType);
if (!JS_HasProperty(m_ctx, m_propertyEventHandler, atom)) {
if (!JS_HasProperty(m_ctx, m_propertyEventHandler.value(), atom)) {
return JS_NULL;
}
return JS_GetProperty(m_ctx, m_propertyEventHandler, atom);
return JS_GetProperty(m_ctx, m_propertyEventHandler.value(), atom);
}

void EventTargetInstance::finalize(JSRuntime* rt, JSValue val) {
Expand All @@ -453,27 +449,18 @@ JSValue EventTargetInstance::getNativeProperty(const char* prop) {
return result;
}

void EventTargetInstance::gcMark(JSRuntime* rt, JSValue val, JS_MarkFunc* mark_func) {
// Tell gc eventTargetInstance have these properties.
// Should check object is already inited before gc mark.
if (JS_IsObject(m_eventHandlers))
JS_MarkValue(rt, m_eventHandlers, mark_func);
if (JS_IsObject(m_propertyEventHandler))
JS_MarkValue(rt, m_propertyEventHandler, mark_func);
if (JS_IsObject(m_properties))
JS_MarkValue(rt, m_properties, mark_func);
}
void EventTargetInstance::gcMark(JSRuntime* rt, JSValue val, JS_MarkFunc* mark_func) {}
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@yuanyan yuanyan Dec 1, 2021 •
edited

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这个函数是空的，需要注释说明下，目前c++代码注释是比较少的


void EventTargetInstance::copyNodeProperties(EventTargetInstance* newNode, EventTargetInstance* referenceNode) {
QjsContext* ctx = referenceNode->m_ctx;
JSValue propKeys = objectGetKeys(ctx, referenceNode->m_properties);
JSValue propKeys = objectGetKeys(ctx, referenceNode->m_properties.value());
uint32_t propKeyLen = arrayGetLength(ctx, propKeys);

for (int i = 0; i < propKeyLen; i++) {
JSValue k = JS_GetPropertyUint32(ctx, propKeys, i);
JSAtom kt = JS_ValueToAtom(ctx, k);
JSValue v = JS_GetProperty(ctx, referenceNode->m_properties, kt);
JS_SetProperty(ctx, newNode->m_properties, kt, JS_DupValue(ctx, v));
JSValue v = JS_GetProperty(ctx, referenceNode->m_properties.value(), kt);
JS_SetProperty(ctx, newNode->m_properties.value(), kt, JS_DupValue(ctx, v));

JS_FreeAtom(ctx, kt);
JS_FreeValue(ctx, k);
Expand Down
6 changes: 3 additions & 3 deletions bridge/bindings/qjs/dom/event_target.h
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Expand Up @@ -84,9 +84,9 @@ class EventTargetInstance : public Instance {

protected:
int32_t m_eventTargetId;
JSValue m_eventHandlers{JS_NewObject(m_ctx)};
JSValue m_propertyEventHandler{JS_NewObject(m_ctx)};
JSValue m_properties{JS_NewObject(m_ctx)};
ObjectProperty m_eventHandlers{m_context, instanceObject, "__eventHandlers", JS_NewObject(m_ctx)};
ObjectProperty m_propertyEventHandler{m_context, instanceObject, "__propertyEventHandler", JS_NewObject(m_ctx)};
ObjectProperty m_properties{m_context, instanceObject, "__properties", JS_NewObject(m_ctx)};

void gcMark(JSRuntime* rt, JSValue val, JS_MarkFunc* mark_func) override;
static void copyNodeProperties(EventTargetInstance* newNode, EventTargetInstance* referenceNode);
Expand Down
7 changes: 6 additions & 1 deletion bridge/bindings/qjs/js_context.h
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Expand Up @@ -147,9 +147,14 @@ class ObjectProperty {
JS_DefineProperty(context->ctx(), thisObject, key, JS_UNDEFINED, get, JS_UNDEFINED, JS_PROP_HAS_CONFIGURABLE | JS_PROP_ENUMERABLE | JS_PROP_HAS_GET);
JS_FreeAtom(context->ctx(), key);
}
explicit ObjectProperty(JSContext* context, JSValueConst thisObject, const char* property, JSValue value) {
explicit ObjectProperty(JSContext* context, JSValueConst thisObject, const char* property, JSValue value) : m_value(value) {
JS_DefinePropertyValueStr(context->ctx(), thisObject, property, value, JS_PROP_ENUMERABLE);
}

JSValue value() { return m_value; }

private:
JSValue m_value{JS_NULL};
};

class ObjectFunction {
Expand Down