diff options
author | Jean-François Milants <jf@codingfield.com> | 2021-07-25 19:55:21 +0200 |
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committer | Jean-François Milants <jf@codingfield.com> | 2021-07-25 19:55:21 +0200 |
commit | 514481ef7f9c71ad816b31d979c6ab39ce9380dd (patch) | |
tree | 5035758f67041f22d273cb6a3384ec7777310804 | |
parent | 7b75ca591d31ccd8883a1a1ff83cfd271959dbaa (diff) |
Tile event handler : read the event data only if the event is a "value changed event". LVGL sends many other event and some of them do not set the event data (global static variable) to a valid address, which may cause an invalid read. I noticed that when porting this class on RISC-V platform (BL602).
-rw-r--r-- | src/displayapp/screens/Tile.cpp | 18 | ||||
-rw-r--r-- | src/displayapp/screens/Tile.h | 2 |
2 files changed, 11 insertions, 9 deletions
diff --git a/src/displayapp/screens/Tile.cpp b/src/displayapp/screens/Tile.cpp index 3eb127cc..d5d6cb80 100644 --- a/src/displayapp/screens/Tile.cpp +++ b/src/displayapp/screens/Tile.cpp @@ -6,15 +6,17 @@ using namespace Pinetime::Applications::Screens; namespace { static void lv_update_task(struct _lv_task_t* task) { - auto user_data = static_cast<Tile*>(task->user_data); + auto* user_data = static_cast<Tile*>(task->user_data); user_data->UpdateScreen(); } static void event_handler(lv_obj_t* obj, lv_event_t event) { + if (event != LV_EVENT_VALUE_CHANGED) return; + Tile* screen = static_cast<Tile*>(obj->user_data); - uint32_t* eventDataPtr = (uint32_t*) lv_event_get_data(); + auto* eventDataPtr = (uint32_t*) lv_event_get_data(); uint32_t eventData = *eventDataPtr; - screen->OnObjectEvent(obj, event, eventData); + screen->OnValueChangedEvent(obj, eventData); } } @@ -124,9 +126,9 @@ bool Tile::Refresh() { return running; } -void Tile::OnObjectEvent(lv_obj_t* obj, lv_event_t event, uint32_t buttonId) { - if (event == LV_EVENT_VALUE_CHANGED) { - app->StartApp(apps[buttonId], DisplayApp::FullRefreshDirections::Up); - running = false; - } +void Tile::OnValueChangedEvent(lv_obj_t* obj, uint32_t buttonId) { + if(obj != btnm1) return; + + app->StartApp(apps[buttonId], DisplayApp::FullRefreshDirections::Up); + running = false; } diff --git a/src/displayapp/screens/Tile.h b/src/displayapp/screens/Tile.h index 4ebd81cd..765a8def 100644 --- a/src/displayapp/screens/Tile.h +++ b/src/displayapp/screens/Tile.h @@ -32,7 +32,7 @@ namespace Pinetime { bool Refresh() override; void UpdateScreen(); - void OnObjectEvent(lv_obj_t* obj, lv_event_t event, uint32_t buttonId); + void OnValueChangedEvent(lv_obj_t* obj, uint32_t buttonId); private: Pinetime::Controllers::Battery& batteryController; |