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Fix GTask reference counting (flutter/engine#56866)

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Incorrect reference counting of GTask objects meant platform channel
method calls would leave tasks alive that would leak memory and leave
unclosed references to the binary messenger.
This commit is contained in:
Robert Ancell 2024-12-03 13:37:31 +13:00 committed by GitHub
parent 4c98a1c2cd
commit 983837c311
3 changed files with 15 additions and 12 deletions
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9
engine/src/flutter/shell/platform/linux/fl_basic_message_channel.cc
View File

@ -103,8 +103,8 @@ static void message_cb(FlBinaryMessenger* messenger,
static void message_response_cb(GObject* object,
GAsyncResult* result,
gpointer user_data) {
GTask* task = G_TASK(user_data);
g_task_return_pointer(task, result, g_object_unref);
g_autoptr(GTask) task = G_TASK(user_data);
g_task_return_pointer(task, g_object_ref(result), g_object_unref);
}
// Called when the channel handler is closed.
@ -257,8 +257,9 @@ G_MODULE_EXPORT FlValue* fl_basic_message_channel_send_finish(
g_return_val_if_fail(FL_IS_BASIC_MESSAGE_CHANNEL(self), nullptr);
g_return_val_if_fail(g_task_is_valid(result, self), nullptr);
g_autoptr(GTask) task = G_TASK(result);
GAsyncResult* r = G_ASYNC_RESULT(g_task_propagate_pointer(task, error));
GTask* task = G_TASK(result);
g_autoptr(GAsyncResult) r =
G_ASYNC_RESULT(g_task_propagate_pointer(task, error));
if (r == nullptr) {
return nullptr;
}

9
engine/src/flutter/shell/platform/linux/fl_binary_messenger.cc
View File

@ -260,8 +260,8 @@ static gboolean send_response(FlBinaryMessenger* messenger,
static void platform_message_ready_cb(GObject* object,
GAsyncResult* result,
gpointer user_data) {
GTask* task = G_TASK(user_data);
g_task_return_pointer(task, result, g_object_unref);
g_autoptr(GTask) task = G_TASK(user_data);
g_task_return_pointer(task, g_object_ref(result), g_object_unref);
}
static void send_on_channel(FlBinaryMessenger* messenger,
@ -290,8 +290,9 @@ static GBytes* send_on_channel_finish(FlBinaryMessenger* messenger,
FlBinaryMessengerImpl* self = FL_BINARY_MESSENGER_IMPL(messenger);
g_return_val_if_fail(g_task_is_valid(result, self), FALSE);
g_autoptr(GTask) task = G_TASK(result);
GAsyncResult* r = G_ASYNC_RESULT(g_task_propagate_pointer(task, error));
GTask* task = G_TASK(result);
g_autoptr(GAsyncResult) r =
G_ASYNC_RESULT(g_task_propagate_pointer(task, error));
if (r == nullptr) {
return nullptr;
}

9
engine/src/flutter/shell/platform/linux/fl_method_channel.cc
View File

@ -63,8 +63,8 @@ static void message_cb(FlBinaryMessenger* messenger,
static void message_response_cb(GObject* object,
GAsyncResult* result,
gpointer user_data) {
GTask* task = G_TASK(user_data);
g_task_return_pointer(task, result, g_object_unref);
g_autoptr(GTask) task = G_TASK(user_data);
g_task_return_pointer(task, g_object_ref(result), g_object_unref);
}
// Called when the channel handler is closed.
@ -196,8 +196,9 @@ G_MODULE_EXPORT FlMethodResponse* fl_method_channel_invoke_method_finish(
g_return_val_if_fail(FL_IS_METHOD_CHANNEL(self), nullptr);
g_return_val_if_fail(g_task_is_valid(result, self), nullptr);
g_autoptr(GTask) task = G_TASK(result);
GAsyncResult* r = G_ASYNC_RESULT(g_task_propagate_pointer(task, error));
GTask* task = G_TASK(result);
g_autoptr(GAsyncResult) r =
G_ASYNC_RESULT(g_task_propagate_pointer(task, error));
if (r == nullptr) {
return nullptr;
}