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hle: kernel: svc: Fix deadlock that can occur with single core.

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This commit is contained in:
bunnei 2021-11-26 15:35:11 -08:00
parent 0d9afdedc4
commit e3d156ab0e
1 changed files with 8 additions and 10 deletions
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18
src/core/hle/kernel/svc.cpp
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@ -308,12 +308,18 @@ static ResultCode ConnectToNamedPort32(Core::System& system, Handle* out_handle,
/// Makes a blocking IPC call to an OS service.
static ResultCode SendSyncRequest(Core::System& system, Handle handle) {
auto& kernel = system.Kernel();
// Create the wait queue.
KThreadQueue wait_queue(kernel);
// Get the client session from its handle.
KScopedAutoObject session =
kernel.CurrentProcess()->GetHandleTable().GetObject<KClientSession>(handle);
R_UNLESS(session.IsNotNull(), ResultInvalidHandle);
LOG_TRACE(Kernel_SVC, "called handle=0x{:08X}({})", handle, session->GetName());
auto thread = kernel.CurrentScheduler()->GetCurrentThread();
{
KScopedSchedulerLock lock(kernel);
@ -321,15 +327,7 @@ static ResultCode SendSyncRequest(Core::System& system, Handle handle) {
// This is a synchronous request, so we should wait for our request to complete.
GetCurrentThread(kernel).BeginWait(std::addressof(wait_queue));
GetCurrentThread(kernel).SetWaitReasonForDebugging(ThreadWaitReasonForDebugging::IPC);
{
KScopedAutoObject session =
kernel.CurrentProcess()->GetHandleTable().GetObject<KClientSession>(handle);
R_UNLESS(session.IsNotNull(), ResultInvalidHandle);
LOG_TRACE(Kernel_SVC, "called handle=0x{:08X}({})", handle, session->GetName());
session->SendSyncRequest(&GetCurrentThread(kernel), system.Memory(),
system.CoreTiming());
}
session->SendSyncRequest(&GetCurrentThread(kernel), system.Memory(), system.CoreTiming());
}
return thread->GetWaitResult();