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service: vi: Retrieve vsync event once per display

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The display vsync event can only be retrieved once per display. Returns VI::ResultPermissionDenied if we attempt to retrieve the vsync event for the same display.

Prevents games such as .hack//G.U. Last Recode from consuming all the handles in the handle table by spamming vsync event retrievals and allows it to go in game.
This commit is contained in:
Morph
2022-09-25 21:20:36 -04:00
parent acc887cc34
commit 41e855bd42
5 changed files with 42 additions and 14 deletions
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14
src/core/hle/service/vi/vi.cpp
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@ -671,19 +671,23 @@ private:
IPC::RequestParser rp{ctx};
const u64 display_id = rp.Pop<u64>();
LOG_WARNING(Service_VI, "(STUBBED) called. display_id=0x{:016X}", display_id);
LOG_DEBUG(Service_VI, "called. display_id={}", display_id);
const auto vsync_event = nv_flinger.FindVsyncEvent(display_id);
if (!vsync_event) {
LOG_ERROR(Service_VI, "Vsync event was not found for display_id={}", display_id);
if (vsync_event.Failed()) {
const auto result = vsync_event.Code();
if (result == ResultNotFound) {
LOG_ERROR(Service_VI, "Vsync event was not found for display_id={}", display_id);
}
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ResultNotFound);
rb.Push(result);
return;
}
IPC::ResponseBuilder rb{ctx, 2, 1};
rb.Push(ResultSuccess);
rb.PushCopyObjects(vsync_event);
rb.PushCopyObjects(*vsync_event);
}
void ConvertScalingMode(Kernel::HLERequestContext& ctx) {