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core/debugger: Improved stepping mechanism and misc fixes

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This commit is contained in:
Liam
2022-05-31 14:37:37 -04:00
parent fb4b3c127f
commit 989d4a7a41
16 changed files with 252 additions and 122 deletions
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45
src/core/arm/arm_interface.cpp
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@ -11,6 +11,7 @@
#include "core/core.h"
#include "core/debugger/debugger.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/svc.h"
#include "core/loader/loader.h"
#include "core/memory.h"
@ -89,8 +90,48 @@ void ARM_Interface::LogBacktrace() const {
}
}
bool ARM_Interface::ShouldStep() const {
return system.DebuggerEnabled() && system.GetDebugger().IsStepping();
void ARM_Interface::Run() {
using Kernel::StepState;
using Kernel::SuspendType;
while (true) {
Kernel::KThread* current_thread{system.Kernel().CurrentScheduler()->GetCurrentThread()};
Dynarmic::HaltReason hr{};
// Notify the debugger and go to sleep if a step was performed
// and this thread has been scheduled again.
if (current_thread->GetStepState() == StepState::StepPerformed) {
system.GetDebugger().NotifyThreadStopped(current_thread);
current_thread->RequestSuspend(SuspendType::Debug);
break;
}
// Otherwise, run the thread.
if (current_thread->GetStepState() == StepState::StepPending) {
hr = StepJit();
if (Has(hr, step_thread)) {
current_thread->SetStepState(StepState::StepPerformed);
}
} else {
hr = RunJit();
}
// Notify the debugger and go to sleep if a breakpoint was hit.
if (Has(hr, breakpoint)) {
system.GetDebugger().NotifyThreadStopped(current_thread);
current_thread->RequestSuspend(Kernel::SuspendType::Debug);
break;
}
// Handle syscalls and scheduling (this may change the current thread)
if (Has(hr, svc_call)) {
Kernel::Svc::Call(system, GetSvcNumber());
}
if (Has(hr, break_loop) || !uses_wall_clock) {
break;
}
}
}
} // namespace Core

14
src/core/arm/arm_interface.h
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@ -6,6 +6,9 @@
#include <array>
#include <vector>
#include <dynarmic/interface/halt_reason.h>
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "core/hardware_properties.h"
@ -64,7 +67,7 @@ public:
static_assert(sizeof(ThreadContext64) == 0x320);
/// Runs the CPU until an event happens
virtual void Run() = 0;
void Run();
/// Clear all instruction cache
virtual void ClearInstructionCache() = 0;
@ -191,7 +194,10 @@ public:
void LogBacktrace() const;
bool ShouldStep() const;
static constexpr Dynarmic::HaltReason step_thread = Dynarmic::HaltReason::Step;
static constexpr Dynarmic::HaltReason break_loop = Dynarmic::HaltReason::UserDefined2;
static constexpr Dynarmic::HaltReason svc_call = Dynarmic::HaltReason::UserDefined3;
static constexpr Dynarmic::HaltReason breakpoint = Dynarmic::HaltReason::UserDefined4;
protected:
/// System context that this ARM interface is running under.
@ -200,6 +206,10 @@ protected:
bool uses_wall_clock;
static void SymbolicateBacktrace(Core::System& system, std::vector<BacktraceEntry>& out);
virtual Dynarmic::HaltReason RunJit() = 0;
virtual Dynarmic::HaltReason StepJit() = 0;
virtual u32 GetSvcNumber() const = 0;
};
} // namespace Core

45
src/core/arm/dynarmic/arm_dynarmic_32.cpp
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@ -26,10 +26,6 @@ namespace Core {
using namespace Common::Literals;
constexpr Dynarmic::HaltReason break_loop = Dynarmic::HaltReason::UserDefined2;
constexpr Dynarmic::HaltReason svc_call = Dynarmic::HaltReason::UserDefined3;
constexpr Dynarmic::HaltReason breakpoint = Dynarmic::HaltReason::UserDefined4;
class DynarmicCallbacks32 : public Dynarmic::A32::UserCallbacks {
public:
explicit DynarmicCallbacks32(ARM_Dynarmic_32& parent_)
@ -82,8 +78,8 @@ public:
void ExceptionRaised(u32 pc, Dynarmic::A32::Exception exception) override {
if (parent.system.DebuggerEnabled()) {
parent.breakpoint_pc = pc;
parent.jit.load()->HaltExecution(breakpoint);
parent.jit.load()->Regs()[15] = pc;
parent.jit.load()->HaltExecution(ARM_Interface::breakpoint);
return;
}
@ -95,7 +91,7 @@ public:
void CallSVC(u32 swi) override {
parent.svc_swi = swi;
parent.jit.load()->HaltExecution(svc_call);
parent.jit.load()->HaltExecution(ARM_Interface::svc_call);
}
void AddTicks(u64 ticks) override {
@ -240,35 +236,16 @@ std::shared_ptr<Dynarmic::A32::Jit> ARM_Dynarmic_32::MakeJit(Common::PageTable*
return std::make_unique<Dynarmic::A32::Jit>(config);
}
void ARM_Dynarmic_32::Run() {
while (true) {
const auto hr = ShouldStep() ? jit.load()->Step() : jit.load()->Run();
if (Has(hr, svc_call)) {
Kernel::Svc::Call(system, svc_swi);
}
Dynarmic::HaltReason ARM_Dynarmic_32::RunJit() {
return jit.load()->Run();
}
// Check to see if breakpoint is triggered.
// Recheck step condition in case stop is no longer desired.
Kernel::KThread* current_thread = system.Kernel().GetCurrentEmuThread();
if (Has(hr, breakpoint)) {
jit.load()->Regs()[15] = breakpoint_pc;
Dynarmic::HaltReason ARM_Dynarmic_32::StepJit() {
return jit.load()->Step();
}
if (system.GetDebugger().NotifyThreadStopped(current_thread)) {
current_thread->RequestSuspend(Kernel::SuspendType::Debug);
}
break;
}
if (ShouldStep()) {
// When stepping, this should be the only thread running.
ASSERT(system.GetDebugger().NotifyThreadStopped(current_thread));
current_thread->RequestSuspend(Kernel::SuspendType::Debug);
break;
}
if (Has(hr, break_loop) || !uses_wall_clock) {
break;
}
}
u32 ARM_Dynarmic_32::GetSvcNumber() const {
return svc_swi;
}
ARM_Dynarmic_32::ARM_Dynarmic_32(System& system_, CPUInterrupts& interrupt_handlers_,

9
src/core/arm/dynarmic/arm_dynarmic_32.h
View File

@ -41,7 +41,6 @@ public:
void SetVectorReg(int index, u128 value) override;
u32 GetPSTATE() const override;
void SetPSTATE(u32 pstate) override;
void Run() override;
VAddr GetTlsAddress() const override;
void SetTlsAddress(VAddr address) override;
void SetTPIDR_EL0(u64 value) override;
@ -69,6 +68,11 @@ public:
std::vector<BacktraceEntry> GetBacktrace() const override;
protected:
Dynarmic::HaltReason RunJit() override;
Dynarmic::HaltReason StepJit() override;
u32 GetSvcNumber() const override;
private:
std::shared_ptr<Dynarmic::A32::Jit> MakeJit(Common::PageTable* page_table) const;
@ -94,9 +98,6 @@ private:
// SVC callback
u32 svc_swi{};
// Debug restart address
u32 breakpoint_pc{};
};
} // namespace Core

45
src/core/arm/dynarmic/arm_dynarmic_64.cpp
View File

@ -26,10 +26,6 @@ namespace Core {
using Vector = Dynarmic::A64::Vector;
using namespace Common::Literals;
constexpr Dynarmic::HaltReason break_loop = Dynarmic::HaltReason::UserDefined2;
constexpr Dynarmic::HaltReason svc_call = Dynarmic::HaltReason::UserDefined3;
constexpr Dynarmic::HaltReason breakpoint = Dynarmic::HaltReason::UserDefined4;
class DynarmicCallbacks64 : public Dynarmic::A64::UserCallbacks {
public:
explicit DynarmicCallbacks64(ARM_Dynarmic_64& parent_)
@ -123,8 +119,8 @@ public:
return;
default:
if (parent.system.DebuggerEnabled()) {
parent.breakpoint_pc = pc;
parent.jit.load()->HaltExecution(breakpoint);
parent.jit.load()->SetPC(pc);
parent.jit.load()->HaltExecution(ARM_Interface::breakpoint);
return;
}
@ -136,7 +132,7 @@ public:
void CallSVC(u32 swi) override {
parent.svc_swi = swi;
parent.jit.load()->HaltExecution(svc_call);
parent.jit.load()->HaltExecution(ARM_Interface::svc_call);
}
void AddTicks(u64 ticks) override {
@ -300,35 +296,16 @@ std::shared_ptr<Dynarmic::A64::Jit> ARM_Dynarmic_64::MakeJit(Common::PageTable*
return std::make_shared<Dynarmic::A64::Jit>(config);
}
void ARM_Dynarmic_64::Run() {
while (true) {
const auto hr = jit.load()->Run();
if (Has(hr, svc_call)) {
Kernel::Svc::Call(system, svc_swi);
}
Dynarmic::HaltReason ARM_Dynarmic_64::RunJit() {
return jit.load()->Run();
}
// Check to see if breakpoint is triggered.
// Recheck step condition in case stop is no longer desired.
Kernel::KThread* current_thread = system.Kernel().GetCurrentEmuThread();
if (Has(hr, breakpoint)) {
jit.load()->SetPC(breakpoint_pc);
Dynarmic::HaltReason ARM_Dynarmic_64::StepJit() {
return jit.load()->Step();
}
if (system.GetDebugger().NotifyThreadStopped(current_thread)) {
current_thread->RequestSuspend(Kernel::SuspendType::Debug);
}
break;
}
if (ShouldStep()) {
// When stepping, this should be the only thread running.
ASSERT(system.GetDebugger().NotifyThreadStopped(current_thread));
current_thread->RequestSuspend(Kernel::SuspendType::Debug);
break;
}
if (Has(hr, break_loop) || !uses_wall_clock) {
break;
}
}
u32 ARM_Dynarmic_64::GetSvcNumber() const {
return svc_swi;
}
ARM_Dynarmic_64::ARM_Dynarmic_64(System& system_, CPUInterrupts& interrupt_handlers_,

9
src/core/arm/dynarmic/arm_dynarmic_64.h
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@ -39,7 +39,6 @@ public:
void SetVectorReg(int index, u128 value) override;
u32 GetPSTATE() const override;
void SetPSTATE(u32 pstate) override;
void Run() override;
VAddr GetTlsAddress() const override;
void SetTlsAddress(VAddr address) override;
void SetTPIDR_EL0(u64 value) override;
@ -63,6 +62,11 @@ public:
std::vector<BacktraceEntry> GetBacktrace() const override;
protected:
Dynarmic::HaltReason RunJit() override;
Dynarmic::HaltReason StepJit() override;
u32 GetSvcNumber() const override;
private:
std::shared_ptr<Dynarmic::A64::Jit> MakeJit(Common::PageTable* page_table,
std::size_t address_space_bits) const;
@ -87,9 +91,6 @@ private:
// SVC callback
u32 svc_swi{};
// Debug restart address
u64 breakpoint_pc{};
};
} // namespace Core