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kern: Svc(Legacy)ContinueDebugEvent

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This commit is contained in:
Michael Scire 2020-07-30 20:49:58 -07:00 committed by SciresM
parent 3289b45408
commit b143f1e05f
9 changed files with 200 additions and 6 deletions
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5
libraries/libmesosphere/include/mesosphere/kern_k_debug_base.hpp
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@ -36,9 +36,10 @@ namespace ams::kern {
virtual ~KDebugBase() { /* ... */ }
public:
void Initialize();
Result Attach(KProcess *process);
KScopedAutoObject<KProcess> GetProcess();
Result ContinueDebug(const u32 flags, const u64 *thread_ids, size_t num_thread_ids);
Result QueryMemoryInfo(ams::svc::MemoryInfo *out_memory_info, ams::svc::PageInfo *out_page_info, KProcessAddress address);
Result ReadMemory(KProcessAddress buffer, KProcessAddress address, size_t size);
@ -49,6 +50,8 @@ namespace ams::kern {
Result GetDebugEventInfo(ams::svc::lp64::DebugEventInfo *out);
Result GetDebugEventInfo(ams::svc::ilp32::DebugEventInfo *out);
KScopedAutoObject<KProcess> GetProcess();
/* TODO: This is a placeholder definition. */
private:
void PushDebugEvent(ams::svc::DebugEvent event, uintptr_t param0 = 0, uintptr_t param1 = 0, uintptr_t param2 = 0, uintptr_t param3 = 0, uintptr_t param4 = 0);

13
libraries/libmesosphere/include/mesosphere/kern_k_process.hpp
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@ -194,6 +194,7 @@ namespace ams::kern {
void ClearDebugObject(KProcess::State state);
KEventInfo *GetJitDebugInfo();
void ClearJitDebugInfo();
bool EnterUserException();
bool LeaveUserException();
@ -296,6 +297,18 @@ namespace ams::kern {
Result Reset();
void SetDebugBreak() {
if (this->state == State_RunningAttached) {
this->ChangeState(State_DebugBreak);
}
}
void SetAttached() {
if (this->state == State_DebugBreak) {
this->ChangeState(State_RunningAttached);
}
}
Result SetActivity(ams::svc::ProcessActivity activity);
void PinCurrentThread();

10
libraries/libmesosphere/include/mesosphere/kern_k_thread.hpp
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@ -402,6 +402,16 @@ namespace ams::kern {
return this->wait_result;
}
constexpr void SetDebugExceptionResult(Result result) {
MESOSPHERE_ASSERT_THIS();
this->debug_exception_result = result;
}
constexpr Result GetDebugExceptionResult() const {
MESOSPHERE_ASSERT_THIS();
return this->debug_exception_result;
}
void WaitCancel();
bool IsWaitCancelled() const { return this->wait_cancelled; }

2
libraries/libmesosphere/include/mesosphere/svc/kern_svc_results.hpp
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@ -24,6 +24,8 @@ namespace ams::kern::svc {
/* 33 */ using ::ams::svc::ResultNotImplemented;
/* 54 */ using ::ams::svc::ResultStopProcessingException;
/* 57 */ using ::ams::svc::ResultNoSynchronizationObject;
/* 59 */ using ::ams::svc::ResultTerminationRequested;

91
libraries/libmesosphere/source/kern_k_debug_base.cpp
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@ -341,6 +341,95 @@ namespace ams::kern {
return ResultSuccess();
}
Result KDebugBase::ContinueDebug(const u32 flags, const u64 *thread_ids, size_t num_thread_ids) {
/* Get the attached process. */
KScopedAutoObject target = this->GetProcess();
R_UNLESS(target.IsNotNull(), svc::ResultProcessTerminated());
/* Lock both ourselves, the target process, and the scheduler. */
KScopedLightLock state_lk(target->GetStateLock());
KScopedLightLock list_lk(target->GetListLock());
KScopedLightLock this_lk(this->lock);
KScopedSchedulerLock sl;
/* Check that we're still attached to the process, and that it's not terminated. */
R_UNLESS(this->process == target.GetPointerUnsafe(), svc::ResultProcessTerminated());
R_UNLESS(!target->IsTerminated(), svc::ResultProcessTerminated());
/* Check that we have no pending events. */
R_UNLESS(this->event_info_list.empty(), svc::ResultBusy());
/* Clear the target's JIT debug info. */
target->ClearJitDebugInfo();
/* Set our continue flags. */
this->continue_flags = flags;
/* Iterate over threads, continuing them as we should. */
bool has_debug_break_thread = false;
{
/* Parse our flags. */
const bool exception_handled = (this->continue_flags & ams::svc::ContinueFlag_ExceptionHandled) != 0;
const bool continue_all = (this->continue_flags & ams::svc::ContinueFlag_ContinueAll) != 0;
const bool continue_others = (this->continue_flags & ams::svc::ContinueFlag_ContinueOthers) != 0;
/* Update each thread. */
auto end = target->GetThreadList().end();
for (auto it = target->GetThreadList().begin(); it != end; ++it) {
/* Determine if we should continue the thread. */
bool should_continue;
{
if (continue_all) {
/* Continue all threads. */
should_continue = true;
} else if (continue_others) {
/* Continue the thread if it doesn't match one of our target ids. */
const u64 thread_id = it->GetId();
should_continue = true;
for (size_t i = 0; i < num_thread_ids; ++i) {
if (thread_ids[i] == thread_id) {
should_continue = false;
break;
}
}
} else {
/* Continue the thread if it matches one of our target ids. */
const u64 thread_id = it->GetId();
should_continue = false;
for (size_t i = 0; i < num_thread_ids; ++i) {
if (thread_ids[i] == thread_id) {
should_continue = true;
break;
}
}
}
}
/* Continue the thread if we should. */
if (should_continue) {
if (exception_handled) {
it->SetDebugExceptionResult(svc::ResultStopProcessingException());
}
it->Resume(KThread::SuspendType_Debug);
}
/* If the thread has debug suspend requested, note so. */
if (it->IsSuspendRequested(KThread::SuspendType_Debug)) {
has_debug_break_thread = true;
}
}
}
/* Set the process's state. */
if (has_debug_break_thread) {
target->SetDebugBreak();
} else {
target->SetAttached();
}
return ResultSuccess();
}
KEventInfo *KDebugBase::CreateDebugEvent(ams::svc::DebugEvent event, uintptr_t param0, uintptr_t param1, uintptr_t param2, uintptr_t param3, uintptr_t param4, u64 cur_thread_id) {
/* Allocate a new event. */
KEventInfo *info = KEventInfo::Allocate();
@ -350,7 +439,7 @@ namespace ams::kern {
/* Set common fields. */
info->event = event;
info->thread_id = 0;
info->flags = 1; /* TODO: enum this in ams::svc */
info->flags = ams::svc::DebugEventFlag_Stopped;
/* Set event specific fields. */
switch (event) {

10
libraries/libmesosphere/source/kern_k_process.cpp
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@ -1000,6 +1000,9 @@ namespace ams::kern {
}
KEventInfo *KProcess::GetJitDebugInfo() {
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
if (this->is_jit_debug) {
return KDebugBase::CreateDebugEvent(this->jit_debug_event_type, this->jit_debug_exception_type, this->jit_debug_params[0], this->jit_debug_params[1], this->jit_debug_params[2], this->jit_debug_params[3], this->jit_debug_thread_id);
} else {
@ -1007,6 +1010,13 @@ namespace ams::kern {
}
}
void KProcess::ClearJitDebugInfo() {
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
this->is_jit_debug = false;
}
KProcess *KProcess::GetProcessFromId(u64 process_id) {
/* Lock the list. */
KProcess::ListAccessor accessor;

64
libraries/libmesosphere/source/svc/kern_svc_debug.cpp
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@ -21,6 +21,8 @@ namespace ams::kern::svc {
namespace {
constexpr inline int32_t MaximumDebuggableThreadCount = 0x60;
Result DebugActiveProcess(ams::svc::Handle *out_handle, uint64_t process_id) {
/* Get the process from its id. */
KProcess *process = KProcess::GetProcessFromId(process_id);
@ -79,6 +81,60 @@ namespace ams::kern::svc {
return ResultSuccess();
}
Result ContinueDebugEventImpl(ams::svc::Handle debug_handle, uint32_t flags, const uint64_t *thread_ids, int32_t num_thread_ids) {
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Continue the event. */
R_TRY(debug->ContinueDebug(flags, thread_ids, num_thread_ids));
return ResultSuccess();
}
Result ContinueDebugEvent(ams::svc::Handle debug_handle, uint32_t flags, KUserPointer<const uint64_t *> user_thread_ids, int32_t num_thread_ids) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNotImplemented());
/* Verify that the flags are valid. */
R_UNLESS((flags | ams::svc::ContinueFlag_AllMask) == ams::svc::ContinueFlag_AllMask, svc::ResultInvalidEnumValue());
/* Verify that continue all and continue others flags are exclusive. */
constexpr u32 AllAndOthersMask = ams::svc::ContinueFlag_ContinueAll | ams::svc::ContinueFlag_ContinueOthers;
R_UNLESS((flags & AllAndOthersMask) != AllAndOthersMask, svc::ResultInvalidEnumValue());
/* Verify that the number of thread ids is valid. */
R_UNLESS((0 <= num_thread_ids && num_thread_ids <= MaximumDebuggableThreadCount), svc::ResultOutOfRange());
/* Copy the threads from userspace. */
uint64_t thread_ids[MaximumDebuggableThreadCount];
if (num_thread_ids > 0) {
R_TRY(user_thread_ids.CopyArrayTo(thread_ids, num_thread_ids));
}
/* Continue the event. */
R_TRY(ContinueDebugEventImpl(debug_handle, flags, thread_ids, num_thread_ids));
return ResultSuccess();
}
Result LegacyContinueDebugEvent(ams::svc::Handle debug_handle, uint32_t flags, uint64_t thread_id) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNotImplemented());
/* Verify that the flags are valid. */
R_UNLESS((flags | ams::svc::ContinueFlag_AllMask) == ams::svc::ContinueFlag_AllMask, svc::ResultInvalidEnumValue());
/* Verify that continue all and continue others flags are exclusive. */
constexpr u32 AllAndOthersMask = ams::svc::ContinueFlag_ContinueAll | ams::svc::ContinueFlag_ContinueOthers;
R_UNLESS((flags & AllAndOthersMask) != AllAndOthersMask, svc::ResultInvalidEnumValue());
/* Continue the event. */
R_TRY(ContinueDebugEventImpl(debug_handle, flags, std::addressof(thread_id), 1));
return ResultSuccess();
}
Result QueryDebugProcessMemory(ams::svc::MemoryInfo *out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle debug_handle, uintptr_t address) {
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
@ -173,11 +229,11 @@ namespace ams::kern::svc {
}
Result ContinueDebugEvent64(ams::svc::Handle debug_handle, uint32_t flags, KUserPointer<const uint64_t *> thread_ids, int32_t num_thread_ids) {
MESOSPHERE_PANIC("Stubbed SvcContinueDebugEvent64 was called.");
return ContinueDebugEvent(debug_handle, flags, thread_ids, num_thread_ids);
}
Result LegacyContinueDebugEvent64(ams::svc::Handle debug_handle, uint32_t flags, uint64_t thread_id) {
MESOSPHERE_PANIC("Stubbed SvcLegacyContinueDebugEvent64 was called.");
return LegacyContinueDebugEvent(debug_handle, flags, thread_id);
}
Result GetDebugThreadContext64(KUserPointer<ams::svc::ThreadContext *> out_context, ams::svc::Handle debug_handle, uint64_t thread_id, uint32_t context_flags) {
@ -227,11 +283,11 @@ namespace ams::kern::svc {
}
Result ContinueDebugEvent64From32(ams::svc::Handle debug_handle, uint32_t flags, KUserPointer<const uint64_t *> thread_ids, int32_t num_thread_ids) {
MESOSPHERE_PANIC("Stubbed SvcContinueDebugEvent64From32 was called.");
return ContinueDebugEvent(debug_handle, flags, thread_ids, num_thread_ids);
}
Result LegacyContinueDebugEvent64From32(ams::svc::Handle debug_handle, uint32_t flags, uint64_t thread_id) {
MESOSPHERE_PANIC("Stubbed SvcLegacyContinueDebugEvent64From32 was called.");
return LegacyContinueDebugEvent(debug_handle, flags, thread_id);
}
Result GetDebugThreadContext64From32(KUserPointer<ams::svc::ThreadContext *> out_context, ams::svc::Handle debug_handle, uint64_t thread_id, uint32_t context_flags) {

2
libraries/libvapours/include/vapours/results/svc_results.hpp
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@ -27,6 +27,8 @@ namespace ams::svc {
R_DEFINE_ERROR_RESULT(NotImplemented, 33);
R_DEFINE_ERROR_RESULT(StopProcessingException, 54);
R_DEFINE_ERROR_RESULT(NoSynchronizationObject, 57);
R_DEFINE_ERROR_RESULT(TerminationRequested, 59);

9
libraries/libvapours/include/vapours/svc/svc_types_common.hpp
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@ -292,6 +292,15 @@ namespace ams::svc {
ThreadContextFlag_All = (ThreadContextFlag_General | ThreadContextFlag_Control | ThreadContextFlag_Fpu | ThreadContextFlag_FpuControl),
};
enum ContinueFlag : u32 {
ContinueFlag_ExceptionHandled = (1u << 0),
ContinueFlag_EnableExceptionEvent = (1u << 1),
ContinueFlag_ContinueAll = (1u << 2),
ContinueFlag_ContinueOthers = (1u << 3),
ContinueFlag_AllMask = (1u << 4) - 1,
};
enum ThreadExitReason : u32 {
ThreadExitReason_ExitThread = 0,
ThreadExitReason_TerminateThread = 1,