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core/debugger: memory breakpoint support

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This commit is contained in:
Liam 2022-06-06 12:56:01 -04:00
parent f86b770ff7
commit 208ed712f4
19 changed files with 520 additions and 64 deletions
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41
src/core/arm/arm_interface.cpp
View file

@ -121,8 +121,15 @@ void ARM_Interface::Run() {
// Notify the debugger and go to sleep if a breakpoint was hit.
if (Has(hr, breakpoint)) {
RewindBreakpointInstruction();
system.GetDebugger().NotifyThreadStopped(current_thread);
current_thread->RequestSuspend(Kernel::SuspendType::Debug);
current_thread->RequestSuspend(SuspendType::Debug);
break;
}
if (Has(hr, watchpoint)) {
RewindBreakpointInstruction();
system.GetDebugger().NotifyThreadWatchpoint(current_thread, *HaltedWatchpoint());
current_thread->RequestSuspend(SuspendType::Debug);
break;
}
@ -136,4 +143,36 @@ void ARM_Interface::Run() {
}
}
void ARM_Interface::LoadWatchpointArray(const WatchpointArray& wp) {
watchpoints = ℘
}
const Kernel::DebugWatchpoint* ARM_Interface::MatchingWatchpoint(
VAddr addr, u64 size, Kernel::DebugWatchpointType access_type) const {
if (!watchpoints) {
return nullptr;
}
const VAddr start_address{addr};
const VAddr end_address{addr + size};
for (size_t i = 0; i < Core::Hardware::NUM_WATCHPOINTS; i++) {
const auto& watch{(*watchpoints)[i]};
if (end_address <= watch.start_address) {
continue;
}
if (start_address >= watch.end_address) {
continue;
}
if ((access_type & watch.type) == Kernel::DebugWatchpointType::None) {
continue;
}
return &watch;
}
return nullptr;
}
} // namespace Core

13
src/core/arm/arm_interface.h
View file

@ -5,6 +5,7 @@
#pragma once
#include <array>
#include <span>
#include <vector>
#include <dynarmic/interface/halt_reason.h>
@ -19,13 +20,16 @@ struct PageTable;
namespace Kernel {
enum class VMAPermission : u8;
}
enum class DebugWatchpointType : u8;
struct DebugWatchpoint;
} // namespace Kernel
namespace Core {
class System;
class CPUInterruptHandler;
using CPUInterrupts = std::array<CPUInterruptHandler, Core::Hardware::NUM_CPU_CORES>;
using WatchpointArray = std::array<Kernel::DebugWatchpoint, Core::Hardware::NUM_WATCHPOINTS>;
/// Generic ARMv8 CPU interface
class ARM_Interface {
@ -170,6 +174,7 @@ public:
virtual void SaveContext(ThreadContext64& ctx) = 0;
virtual void LoadContext(const ThreadContext32& ctx) = 0;
virtual void LoadContext(const ThreadContext64& ctx) = 0;
void LoadWatchpointArray(const WatchpointArray& wp);
/// Clears the exclusive monitor's state.
virtual void ClearExclusiveState() = 0;
@ -198,18 +203,24 @@ public:
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;
static constexpr Dynarmic::HaltReason watchpoint = Dynarmic::HaltReason::UserDefined5;
protected:
/// System context that this ARM interface is running under.
System& system;
CPUInterrupts& interrupt_handlers;
const WatchpointArray* watchpoints;
bool uses_wall_clock;
static void SymbolicateBacktrace(Core::System& system, std::vector<BacktraceEntry>& out);
const Kernel::DebugWatchpoint* MatchingWatchpoint(
VAddr addr, u64 size, Kernel::DebugWatchpointType access_type) const;
virtual Dynarmic::HaltReason RunJit() = 0;
virtual Dynarmic::HaltReason StepJit() = 0;
virtual u32 GetSvcNumber() const = 0;
virtual const Kernel::DebugWatchpoint* HaltedWatchpoint() const = 0;
virtual void RewindBreakpointInstruction() = 0;
};
} // namespace Core

69
src/core/arm/dynarmic/arm_dynarmic_32.cpp
View file

@ -29,45 +29,62 @@ using namespace Common::Literals;
class DynarmicCallbacks32 : public Dynarmic::A32::UserCallbacks {
public:
explicit DynarmicCallbacks32(ARM_Dynarmic_32& parent_)
: parent{parent_}, memory(parent.system.Memory()) {}
: parent{parent_},
memory(parent.system.Memory()), debugger_enabled{parent.system.DebuggerEnabled()} {}
u8 MemoryRead8(u32 vaddr) override {
CheckMemoryAccess(vaddr, 1, Kernel::DebugWatchpointType::Read);
return memory.Read8(vaddr);
}
u16 MemoryRead16(u32 vaddr) override {
CheckMemoryAccess(vaddr, 2, Kernel::DebugWatchpointType::Read);
return memory.Read16(vaddr);
}
u32 MemoryRead32(u32 vaddr) override {
CheckMemoryAccess(vaddr, 4, Kernel::DebugWatchpointType::Read);
return memory.Read32(vaddr);
}
u64 MemoryRead64(u32 vaddr) override {
CheckMemoryAccess(vaddr, 8, Kernel::DebugWatchpointType::Read);
return memory.Read64(vaddr);
}
void MemoryWrite8(u32 vaddr, u8 value) override {
memory.Write8(vaddr, value);
if (CheckMemoryAccess(vaddr, 1, Kernel::DebugWatchpointType::Write)) {
memory.Write8(vaddr, value);
}
}
void MemoryWrite16(u32 vaddr, u16 value) override {
memory.Write16(vaddr, value);
if (CheckMemoryAccess(vaddr, 2, Kernel::DebugWatchpointType::Write)) {
memory.Write16(vaddr, value);
}
}
void MemoryWrite32(u32 vaddr, u32 value) override {
memory.Write32(vaddr, value);
if (CheckMemoryAccess(vaddr, 4, Kernel::DebugWatchpointType::Write)) {
memory.Write32(vaddr, value);
}
}
void MemoryWrite64(u32 vaddr, u64 value) override {
memory.Write64(vaddr, value);
if (CheckMemoryAccess(vaddr, 8, Kernel::DebugWatchpointType::Write)) {
memory.Write64(vaddr, value);
}
}
bool MemoryWriteExclusive8(u32 vaddr, u8 value, u8 expected) override {
return memory.WriteExclusive8(vaddr, value, expected);
return CheckMemoryAccess(vaddr, 1, Kernel::DebugWatchpointType::Write) &&
memory.WriteExclusive8(vaddr, value, expected);
}
bool MemoryWriteExclusive16(u32 vaddr, u16 value, u16 expected) override {
return memory.WriteExclusive16(vaddr, value, expected);
return CheckMemoryAccess(vaddr, 2, Kernel::DebugWatchpointType::Write) &&
memory.WriteExclusive16(vaddr, value, expected);
}
bool MemoryWriteExclusive32(u32 vaddr, u32 value, u32 expected) override {
return memory.WriteExclusive32(vaddr, value, expected);
return CheckMemoryAccess(vaddr, 4, Kernel::DebugWatchpointType::Write) &&
memory.WriteExclusive32(vaddr, value, expected);
}
bool MemoryWriteExclusive64(u32 vaddr, u64 value, u64 expected) override {
return memory.WriteExclusive64(vaddr, value, expected);
return CheckMemoryAccess(vaddr, 8, Kernel::DebugWatchpointType::Write) &&
memory.WriteExclusive64(vaddr, value, expected);
}
void InterpreterFallback(u32 pc, std::size_t num_instructions) override {
@ -77,8 +94,8 @@ public:
}
void ExceptionRaised(u32 pc, Dynarmic::A32::Exception exception) override {
if (parent.system.DebuggerEnabled()) {
parent.jit.load()->Regs()[15] = pc;
if (debugger_enabled) {
parent.SaveContext(parent.breakpoint_context);
parent.jit.load()->HaltExecution(ARM_Interface::breakpoint);
return;
}
@ -117,9 +134,26 @@ public:
return std::max<s64>(parent.system.CoreTiming().GetDowncount(), 0);
}
bool CheckMemoryAccess(VAddr addr, u64 size, Kernel::DebugWatchpointType type) {
if (!debugger_enabled) {
return true;
}
const auto match{parent.MatchingWatchpoint(addr, size, type)};
if (match) {
parent.SaveContext(parent.breakpoint_context);
parent.jit.load()->HaltExecution(ARM_Interface::watchpoint);
parent.halted_watchpoint = match;
return false;
}
return true;
}
ARM_Dynarmic_32& parent;
Core::Memory::Memory& memory;
std::size_t num_interpreted_instructions{};
bool debugger_enabled{};
static constexpr u64 minimum_run_cycles = 1000U;
};
@ -154,6 +188,11 @@ std::shared_ptr<Dynarmic::A32::Jit> ARM_Dynarmic_32::MakeJit(Common::PageTable*
config.code_cache_size = 512_MiB;
config.far_code_offset = 400_MiB;
// Allow memory fault handling to work
if (system.DebuggerEnabled()) {
config.check_halt_on_memory_access = true;
}
// null_jit
if (!page_table) {
// Don't waste too much memory on null_jit
@ -248,6 +287,14 @@ u32 ARM_Dynarmic_32::GetSvcNumber() const {
return svc_swi;
}
const Kernel::DebugWatchpoint* ARM_Dynarmic_32::HaltedWatchpoint() const {
return halted_watchpoint;
}
void ARM_Dynarmic_32::RewindBreakpointInstruction() {
LoadContext(breakpoint_context);
}
ARM_Dynarmic_32::ARM_Dynarmic_32(System& system_, CPUInterrupts& interrupt_handlers_,
bool uses_wall_clock_, ExclusiveMonitor& exclusive_monitor_,
std::size_t core_index_)

6
src/core/arm/dynarmic/arm_dynarmic_32.h
View file

@ -72,6 +72,8 @@ protected:
Dynarmic::HaltReason RunJit() override;
Dynarmic::HaltReason StepJit() override;
u32 GetSvcNumber() const override;
const Kernel::DebugWatchpoint* HaltedWatchpoint() const override;
void RewindBreakpointInstruction() override;
private:
std::shared_ptr<Dynarmic::A32::Jit> MakeJit(Common::PageTable* page_table) const;
@ -98,6 +100,10 @@ private:
// SVC callback
u32 svc_swi{};
// Watchpoint info
const Kernel::DebugWatchpoint* halted_watchpoint;
ThreadContext32 breakpoint_context;
};
} // namespace Core

79
src/core/arm/dynarmic/arm_dynarmic_64.cpp
View file

@ -29,55 +29,76 @@ using namespace Common::Literals;
class DynarmicCallbacks64 : public Dynarmic::A64::UserCallbacks {
public:
explicit DynarmicCallbacks64(ARM_Dynarmic_64& parent_)
: parent{parent_}, memory(parent.system.Memory()) {}
: parent{parent_},
memory(parent.system.Memory()), debugger_enabled{parent.system.DebuggerEnabled()} {}
u8 MemoryRead8(u64 vaddr) override {
CheckMemoryAccess(vaddr, 1, Kernel::DebugWatchpointType::Read);
return memory.Read8(vaddr);
}
u16 MemoryRead16(u64 vaddr) override {
CheckMemoryAccess(vaddr, 2, Kernel::DebugWatchpointType::Read);
return memory.Read16(vaddr);
}
u32 MemoryRead32(u64 vaddr) override {
CheckMemoryAccess(vaddr, 4, Kernel::DebugWatchpointType::Read);
return memory.Read32(vaddr);
}
u64 MemoryRead64(u64 vaddr) override {
CheckMemoryAccess(vaddr, 8, Kernel::DebugWatchpointType::Read);
return memory.Read64(vaddr);
}
Vector MemoryRead128(u64 vaddr) override {
CheckMemoryAccess(vaddr, 16, Kernel::DebugWatchpointType::Read);
return {memory.Read64(vaddr), memory.Read64(vaddr + 8)};
}
void MemoryWrite8(u64 vaddr, u8 value) override {
memory.Write8(vaddr, value);
if (CheckMemoryAccess(vaddr, 1, Kernel::DebugWatchpointType::Write)) {
memory.Write8(vaddr, value);
}
}
void MemoryWrite16(u64 vaddr, u16 value) override {
memory.Write16(vaddr, value);
if (CheckMemoryAccess(vaddr, 2, Kernel::DebugWatchpointType::Write)) {
memory.Write16(vaddr, value);
}
}
void MemoryWrite32(u64 vaddr, u32 value) override {
memory.Write32(vaddr, value);
if (CheckMemoryAccess(vaddr, 4, Kernel::DebugWatchpointType::Write)) {
memory.Write32(vaddr, value);
}
}
void MemoryWrite64(u64 vaddr, u64 value) override {
memory.Write64(vaddr, value);
if (CheckMemoryAccess(vaddr, 8, Kernel::DebugWatchpointType::Write)) {
memory.Write64(vaddr, value);
}
}
void MemoryWrite128(u64 vaddr, Vector value) override {
memory.Write64(vaddr, value[0]);
memory.Write64(vaddr + 8, value[1]);
if (CheckMemoryAccess(vaddr, 16, Kernel::DebugWatchpointType::Write)) {
memory.Write64(vaddr, value[0]);
memory.Write64(vaddr + 8, value[1]);
}
}
bool MemoryWriteExclusive8(u64 vaddr, std::uint8_t value, std::uint8_t expected) override {
return memory.WriteExclusive8(vaddr, value, expected);
return CheckMemoryAccess(vaddr, 1, Kernel::DebugWatchpointType::Write) &&
memory.WriteExclusive8(vaddr, value, expected);
}
bool MemoryWriteExclusive16(u64 vaddr, std::uint16_t value, std::uint16_t expected) override {
return memory.WriteExclusive16(vaddr, value, expected);
return CheckMemoryAccess(vaddr, 2, Kernel::DebugWatchpointType::Write) &&
memory.WriteExclusive16(vaddr, value, expected);
}
bool MemoryWriteExclusive32(u64 vaddr, std::uint32_t value, std::uint32_t expected) override {
return memory.WriteExclusive32(vaddr, value, expected);
return CheckMemoryAccess(vaddr, 4, Kernel::DebugWatchpointType::Write) &&
memory.WriteExclusive32(vaddr, value, expected);
}
bool MemoryWriteExclusive64(u64 vaddr, std::uint64_t value, std::uint64_t expected) override {
return memory.WriteExclusive64(vaddr, value, expected);
return CheckMemoryAccess(vaddr, 8, Kernel::DebugWatchpointType::Write) &&
memory.WriteExclusive64(vaddr, value, expected);
}
bool MemoryWriteExclusive128(u64 vaddr, Vector value, Vector expected) override {
return memory.WriteExclusive128(vaddr, value, expected);
return CheckMemoryAccess(vaddr, 16, Kernel::DebugWatchpointType::Write) &&
memory.WriteExclusive128(vaddr, value, expected);
}
void InterpreterFallback(u64 pc, std::size_t num_instructions) override {
@ -118,8 +139,8 @@ public:
case Dynarmic::A64::Exception::Yield:
return;
default:
if (parent.system.DebuggerEnabled()) {
parent.jit.load()->SetPC(pc);
if (debugger_enabled) {
parent.SaveContext(parent.breakpoint_context);
parent.jit.load()->HaltExecution(ARM_Interface::breakpoint);
return;
}
@ -160,10 +181,27 @@ public:
return parent.system.CoreTiming().GetClockTicks();
}
bool CheckMemoryAccess(VAddr addr, u64 size, Kernel::DebugWatchpointType type) {
if (!debugger_enabled) {
return true;
}
const auto match{parent.MatchingWatchpoint(addr, size, type)};
if (match) {
parent.SaveContext(parent.breakpoint_context);
parent.jit.load()->HaltExecution(ARM_Interface::watchpoint);
parent.halted_watchpoint = match;
return false;
}
return true;
}
ARM_Dynarmic_64& parent;
Core::Memory::Memory& memory;
u64 tpidrro_el0 = 0;
u64 tpidr_el0 = 0;
bool debugger_enabled{};
static constexpr u64 minimum_run_cycles = 1000U;
};
@ -214,6 +252,11 @@ std::shared_ptr<Dynarmic::A64::Jit> ARM_Dynarmic_64::MakeJit(Common::PageTable*
config.code_cache_size = 512_MiB;
config.far_code_offset = 400_MiB;
// Allow memory fault handling to work
if (system.DebuggerEnabled()) {
config.check_halt_on_memory_access = true;
}
// null_jit
if (!page_table) {
// Don't waste too much memory on null_jit
@ -308,6 +351,14 @@ u32 ARM_Dynarmic_64::GetSvcNumber() const {
return svc_swi;
}
const Kernel::DebugWatchpoint* ARM_Dynarmic_64::HaltedWatchpoint() const {
return halted_watchpoint;
}
void ARM_Dynarmic_64::RewindBreakpointInstruction() {
LoadContext(breakpoint_context);
}
ARM_Dynarmic_64::ARM_Dynarmic_64(System& system_, CPUInterrupts& interrupt_handlers_,
bool uses_wall_clock_, ExclusiveMonitor& exclusive_monitor_,
std::size_t core_index_)

6
src/core/arm/dynarmic/arm_dynarmic_64.h
View file

@ -66,6 +66,8 @@ protected:
Dynarmic::HaltReason RunJit() override;
Dynarmic::HaltReason StepJit() override;
u32 GetSvcNumber() const override;
const Kernel::DebugWatchpoint* HaltedWatchpoint() const override;
void RewindBreakpointInstruction() override;
private:
std::shared_ptr<Dynarmic::A64::Jit> MakeJit(Common::PageTable* page_table,
@ -91,6 +93,10 @@ private:
// SVC callback
u32 svc_swi{};
// Breakpoint info
const Kernel::DebugWatchpoint* halted_watchpoint;
ThreadContext64 breakpoint_context;
};
} // namespace Core