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kern: Add real SvcBreak implementation

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This commit is contained in:
Michael Scire 2020-07-31 00:04:43 -07:00 • committed by SciresM
parent 4c3c910774
commit 325802e29d
5 changed files with 160 additions and 11 deletions
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86
libraries/libmesosphere/source/kern_k_process.cpp
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@ -465,7 +465,7 @@ namespace ams::kern {
KScopedSchedulerLock sl;
if (this->state == State_Running || this->state == State_RunningAttached|| this->state == State_Crashed || this->state == State_DebugBreak) {
if (this->state == State_Running || this->state == State_RunningAttached || this->state == State_Crashed || this->state == State_DebugBreak) {
this->ChangeState(State_Terminating);
needs_terminate = true;
}
@ -999,6 +999,90 @@ namespace ams::kern {
}
}
bool KProcess::EnterJitDebug(ams::svc::DebugEvent event, ams::svc::DebugException exception, uintptr_t param1, uintptr_t param2, uintptr_t param3, uintptr_t param4) {
/* Check that we're the current process. */
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_ASSERT(this == GetCurrentProcessPointer());
/* If we aren't allowed to enter jit debug, don't. */
if ((this->flags & ams::svc::CreateProcessFlag_EnableDebug) == 0) {
return false;
}
/* We're the current process, so we should be some kind of running. */
MESOSPHERE_ASSERT(this->state != State_Created);
MESOSPHERE_ASSERT(this->state != State_CreatedAttached);
MESOSPHERE_ASSERT(this->state != State_Terminated);
/* Try to enter JIT debug. */
while (true) {
/* Lock ourselves and the scheduler. */
KScopedLightLock lk(this->state_lock);
KScopedLightLock list_lk(this->list_lock);
KScopedSchedulerLock sl;
/* If we're attached to a debugger, we're necessarily in debug. */
if (this->IsAttachedToDebugger()) {
return true;
}
/* If the current thread is terminating, we can't enter debug. */
if (GetCurrentThread().IsTerminationRequested()) {
return false;
}
/* We're not attached to debugger, so check that. */
MESOSPHERE_ASSERT(this->state != State_RunningAttached);
MESOSPHERE_ASSERT(this->state != State_DebugBreak);
/* If we're terminating, we can't enter debug. */
if (this->state != State_Running && this->state != State_Crashed) {
MESOSPHERE_ASSERT(this->state == State_Terminating);
return false;
}
/* If the current thread is suspended, retry. */
if (GetCurrentThread().IsSuspended()) {
continue;
}
/* Suspend all our threads. */
{
auto end = this->GetThreadList().end();
for (auto it = this->GetThreadList().begin(); it != end; ++it) {
it->RequestSuspend(KThread::SuspendType_Debug);
}
}
/* Change our state to crashed. */
this->ChangeState(State_Crashed);
/* Enter jit debug. */
this->is_jit_debug = true;
this->jit_debug_event_type = event;
this->jit_debug_exception_type = exception;
this->jit_debug_params[0] = param1;
this->jit_debug_params[1] = param2;
this->jit_debug_params[2] = param3;
this->jit_debug_params[3] = param4;
this->jit_debug_thread_id = GetCurrentThread().GetId();
/* Exit our retry loop. */
break;
}
/* Check if our state indicates we're in jit debug. */
{
KScopedSchedulerLock sl;
if (this->state == State_Running || this->state == State_RunningAttached || this->state == State_Crashed || this->state == State_DebugBreak) {
return true;
}
}
return false;
}
KEventInfo *KProcess::GetJitDebugInfo() {
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());