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SVC: Correct svcWaitForAddress and svcSignalToAddress.

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This commit is contained in:
Fernando Sahmkow
2020-03-03 17:19:44 -04:00
parent 1e987dbe8d
commit e4b175ade2
4 changed files with 169 additions and 76 deletions
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230
src/core/hle/kernel/address_arbiter.cpp
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@ -7,11 +7,15 @@
#include "common/assert.h"
#include "common/common_types.h"
#include "core/arm/exclusive_monitor.h"
#include "core/core.h"
#include "core/hle/kernel/address_arbiter.h"
#include "core/hle/kernel/errors.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/scheduler.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/time_manager.h"
#include "core/hle/result.h"
#include "core/memory.h"
@ -20,6 +24,7 @@ namespace Kernel {
// Wake up num_to_wake (or all) threads in a vector.
void AddressArbiter::WakeThreads(const std::vector<std::shared_ptr<Thread>>& waiting_threads,
s32 num_to_wake) {
auto& time_manager = system.Kernel().TimeManager();
// Only process up to 'target' threads, unless 'target' is <= 0, in which case process
// them all.
std::size_t last = waiting_threads.size();
@ -29,12 +34,20 @@ void AddressArbiter::WakeThreads(const std::vector<std::shared_ptr<Thread>>& wai
// Signal the waiting threads.
for (std::size_t i = 0; i < last; i++) {
if (waiting_threads[i]->GetStatus() != ThreadStatus::WaitArb) {
last++;
last = std::min(waiting_threads.size(), last);
continue;
}
time_manager.CancelTimeEvent(waiting_threads[i].get());
ASSERT(waiting_threads[i]->GetStatus() == ThreadStatus::WaitArb);
waiting_threads[i]->SetWaitSynchronizationResult(RESULT_SUCCESS);
waiting_threads[i]->SetSynchronizationResults(nullptr, RESULT_SUCCESS);
RemoveThread(waiting_threads[i]);
waiting_threads[i]->WaitForArbitration(false);
waiting_threads[i]->SetArbiterWaitAddress(0);
waiting_threads[i]->ResumeFromWait();
system.PrepareReschedule(waiting_threads[i]->GetProcessorID());
}
}
@ -56,6 +69,7 @@ ResultCode AddressArbiter::SignalToAddress(VAddr address, SignalType type, s32 v
}
ResultCode AddressArbiter::SignalToAddressOnly(VAddr address, s32 num_to_wake) {
SchedulerLock lock(system.Kernel());
const std::vector<std::shared_ptr<Thread>> waiting_threads =
GetThreadsWaitingOnAddress(address);
WakeThreads(waiting_threads, num_to_wake);
@ -64,6 +78,7 @@ ResultCode AddressArbiter::SignalToAddressOnly(VAddr address, s32 num_to_wake) {
ResultCode AddressArbiter::IncrementAndSignalToAddressIfEqual(VAddr address, s32 value,
s32 num_to_wake) {
SchedulerLock lock(system.Kernel());
auto& memory = system.Memory();
// Ensure that we can write to the address.
@ -71,16 +86,25 @@ ResultCode AddressArbiter::IncrementAndSignalToAddressIfEqual(VAddr address, s32
return ERR_INVALID_ADDRESS_STATE;
}
if (static_cast<s32>(memory.Read32(address)) != value) {
return ERR_INVALID_STATE;
}
const std::size_t current_core = system.CurrentCoreIndex();
auto& monitor = system.Monitor();
u32 current_value;
do {
monitor.SetExclusive(current_core, address);
current_value = memory.Read32(address);
if (current_value != value) {
return ERR_INVALID_STATE;
}
current_value++;
} while (!monitor.ExclusiveWrite32(current_core, address, current_value));
memory.Write32(address, static_cast<u32>(value + 1));
return SignalToAddressOnly(address, num_to_wake);
}
ResultCode AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
s32 num_to_wake) {
SchedulerLock lock(system.Kernel());
auto& memory = system.Memory();
// Ensure that we can write to the address.
@ -92,29 +116,34 @@ ResultCode AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr a
const std::vector<std::shared_ptr<Thread>> waiting_threads =
GetThreadsWaitingOnAddress(address);
// Determine the modified value depending on the waiting count.
const std::size_t current_core = system.CurrentCoreIndex();
auto& monitor = system.Monitor();
s32 updated_value;
if (num_to_wake <= 0) {
if (waiting_threads.empty()) {
updated_value = value + 1;
} else {
updated_value = value - 1;
}
} else {
if (waiting_threads.empty()) {
updated_value = value + 1;
} else if (waiting_threads.size() <= static_cast<u32>(num_to_wake)) {
updated_value = value - 1;
} else {
updated_value = value;
}
}
do {
monitor.SetExclusive(current_core, address);
updated_value = memory.Read32(address);
if (static_cast<s32>(memory.Read32(address)) != value) {
return ERR_INVALID_STATE;
}
if (updated_value != value) {
return ERR_INVALID_STATE;
}
// Determine the modified value depending on the waiting count.
if (num_to_wake <= 0) {
if (waiting_threads.empty()) {
updated_value = value + 1;
} else {
updated_value = value - 1;
}
} else {
if (waiting_threads.empty()) {
updated_value = value + 1;
} else if (waiting_threads.size() <= static_cast<u32>(num_to_wake)) {
updated_value = value - 1;
} else {
updated_value = value;
}
}
} while (!monitor.ExclusiveWrite32(current_core, address, updated_value));
memory.Write32(address, static_cast<u32>(updated_value));
WakeThreads(waiting_threads, num_to_wake);
return RESULT_SUCCESS;
}
@ -136,60 +165,121 @@ ResultCode AddressArbiter::WaitForAddress(VAddr address, ArbitrationType type, s
ResultCode AddressArbiter::WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout,
bool should_decrement) {
auto& memory = system.Memory();
auto& kernel = system.Kernel();
Thread* current_thread = system.CurrentScheduler().GetCurrentThread();
// Ensure that we can read the address.
if (!memory.IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
Handle event_handle = InvalidHandle;
{
SchedulerLockAndSleep lock(kernel, event_handle, current_thread, timeout);
// Ensure that we can read the address.
if (!memory.IsValidVirtualAddress(address)) {
lock.CancelSleep();
return ERR_INVALID_ADDRESS_STATE;
}
/// TODO(Blinkhawk): Check termination pending.
s32 current_value = static_cast<s32>(memory.Read32(address));
if (current_value >= value) {
lock.CancelSleep();
return ERR_INVALID_STATE;
}
s32 decrement_value;
const std::size_t current_core = system.CurrentCoreIndex();
auto& monitor = system.Monitor();
do {
monitor.SetExclusive(current_core, address);
current_value = static_cast<s32>(memory.Read32(address));
if (should_decrement) {
decrement_value = current_value - 1;
} else {
decrement_value = current_value;
}
} while (
!monitor.ExclusiveWrite32(current_core, address, static_cast<u32>(decrement_value)));
// Short-circuit without rescheduling, if timeout is zero.
if (timeout == 0) {
lock.CancelSleep();
return RESULT_TIMEOUT;
}
current_thread->SetSynchronizationResults(nullptr, RESULT_TIMEOUT);
current_thread->SetArbiterWaitAddress(address);
InsertThread(SharedFrom(current_thread));
current_thread->SetStatus(ThreadStatus::WaitArb);
current_thread->WaitForArbitration(true);
}
const s32 cur_value = static_cast<s32>(memory.Read32(address));
if (cur_value >= value) {
return ERR_INVALID_STATE;
if (event_handle != InvalidHandle) {
auto& time_manager = kernel.TimeManager();
time_manager.UnscheduleTimeEvent(event_handle);
}
if (should_decrement) {
memory.Write32(address, static_cast<u32>(cur_value - 1));
{
SchedulerLock lock(kernel);
if (current_thread->IsWaitingForArbitration()) {
RemoveThread(SharedFrom(current_thread));
current_thread->WaitForArbitration(false);
}
}
// Short-circuit without rescheduling, if timeout is zero.
if (timeout == 0) {
return RESULT_TIMEOUT;
}
return WaitForAddressImpl(address, timeout);
return current_thread->GetSignalingResult();
}
ResultCode AddressArbiter::WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) {
auto& memory = system.Memory();
// Ensure that we can read the address.
if (!memory.IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
// Only wait for the address if equal.
if (static_cast<s32>(memory.Read32(address)) != value) {
return ERR_INVALID_STATE;
}
// Short-circuit without rescheduling if timeout is zero.
if (timeout == 0) {
return RESULT_TIMEOUT;
}
return WaitForAddressImpl(address, timeout);
}
ResultCode AddressArbiter::WaitForAddressImpl(VAddr address, s64 timeout) {
auto& kernel = system.Kernel();
Thread* current_thread = system.CurrentScheduler().GetCurrentThread();
current_thread->SetArbiterWaitAddress(address);
InsertThread(SharedFrom(current_thread));
current_thread->SetStatus(ThreadStatus::WaitArb);
current_thread->InvalidateWakeupCallback();
current_thread->WakeAfterDelay(timeout);
system.PrepareReschedule(current_thread->GetProcessorID());
return RESULT_TIMEOUT;
Handle event_handle = InvalidHandle;
{
SchedulerLockAndSleep lock(kernel, event_handle, current_thread, timeout);
// Ensure that we can read the address.
if (!memory.IsValidVirtualAddress(address)) {
lock.CancelSleep();
return ERR_INVALID_ADDRESS_STATE;
}
/// TODO(Blinkhawk): Check termination pending.
s32 current_value = static_cast<s32>(memory.Read32(address));
if (current_value != value) {
lock.CancelSleep();
return ERR_INVALID_STATE;
}
// Short-circuit without rescheduling, if timeout is zero.
if (timeout == 0) {
lock.CancelSleep();
return RESULT_TIMEOUT;
}
current_thread->SetSynchronizationResults(nullptr, RESULT_TIMEOUT);
current_thread->SetArbiterWaitAddress(address);
InsertThread(SharedFrom(current_thread));
current_thread->SetStatus(ThreadStatus::WaitArb);
current_thread->WaitForArbitration(true);
}
if (event_handle != InvalidHandle) {
auto& time_manager = kernel.TimeManager();
time_manager.UnscheduleTimeEvent(event_handle);
}
{
SchedulerLock lock(kernel);
if (current_thread->IsWaitingForArbitration()) {
RemoveThread(SharedFrom(current_thread));
current_thread->WaitForArbitration(false);
}
}
return current_thread->GetSignalingResult();
}
void AddressArbiter::HandleWakeupThread(std::shared_ptr<Thread> thread) {
@ -221,9 +311,9 @@ void AddressArbiter::RemoveThread(std::shared_ptr<Thread> thread) {
const auto iter = std::find_if(thread_list.cbegin(), thread_list.cend(),
[&thread](const auto& entry) { return thread == entry; });
ASSERT(iter != thread_list.cend());
thread_list.erase(iter);
if (iter != thread_list.cend()) {
thread_list.erase(iter);
}
}
std::vector<std::shared_ptr<Thread>> AddressArbiter::GetThreadsWaitingOnAddress(