From 59cbeb3e1ba461f3b138406081e2e12406f7445e Mon Sep 17 00:00:00 2001 From: merry Date: Sun, 10 Apr 2022 15:46:29 +0100 Subject: [PATCH] dynarmic: Fix race when switching page tables --- src/core/arm/dynarmic/arm_dynarmic_32.cpp | 48 ++++++++------ src/core/arm/dynarmic/arm_dynarmic_32.h | 7 +- src/core/arm/dynarmic/arm_dynarmic_64.cpp | 80 +++++++++++++---------- src/core/arm/dynarmic/arm_dynarmic_64.h | 6 +- 4 files changed, 84 insertions(+), 57 deletions(-) diff --git a/src/core/arm/dynarmic/arm_dynarmic_32.cpp b/src/core/arm/dynarmic/arm_dynarmic_32.cpp index ab3210d84..dfae2d844 100644 --- a/src/core/arm/dynarmic/arm_dynarmic_32.cpp +++ b/src/core/arm/dynarmic/arm_dynarmic_32.cpp @@ -88,7 +88,7 @@ public: void CallSVC(u32 swi) override { parent.svc_swi = swi; - parent.jit->HaltExecution(svc_call); + parent.jit.load()->HaltExecution(svc_call); } void AddTicks(u64 ticks) override { @@ -151,6 +151,13 @@ std::shared_ptr ARM_Dynarmic_32::MakeJit(Common::PageTable* config.code_cache_size = 512_MiB; config.far_code_offset = 400_MiB; + // null_jit + if (!page_table) { + // Don't waste too much memory on null_jit + config.code_cache_size = 8_MiB; + config.far_code_offset = 4_MiB; + } + // Safe optimizations if (Settings::values.cpu_debug_mode) { if (!Settings::values.cpuopt_page_tables) { @@ -228,7 +235,7 @@ std::shared_ptr ARM_Dynarmic_32::MakeJit(Common::PageTable* void ARM_Dynarmic_32::Run() { while (true) { - const auto hr = jit->Run(); + const auto hr = jit.load()->Run(); if (Has(hr, svc_call)) { Kernel::Svc::Call(system, svc_swi); } @@ -239,7 +246,7 @@ void ARM_Dynarmic_32::Run() { } void ARM_Dynarmic_32::Step() { - jit->Step(); + jit.load()->Step(); } ARM_Dynarmic_32::ARM_Dynarmic_32(System& system_, CPUInterrupts& interrupt_handlers_, @@ -249,24 +256,24 @@ ARM_Dynarmic_32::ARM_Dynarmic_32(System& system_, CPUInterrupts& interrupt_handl cb(std::make_unique(*this)), cp15(std::make_shared(*this)), core_index{core_index_}, exclusive_monitor{dynamic_cast(exclusive_monitor_)}, - jit(MakeJit(nullptr)) {} + null_jit{MakeJit(nullptr)}, jit{null_jit.get()} {} ARM_Dynarmic_32::~ARM_Dynarmic_32() = default; void ARM_Dynarmic_32::SetPC(u64 pc) { - jit->Regs()[15] = static_cast(pc); + jit.load()->Regs()[15] = static_cast(pc); } u64 ARM_Dynarmic_32::GetPC() const { - return jit->Regs()[15]; + return jit.load()->Regs()[15]; } u64 ARM_Dynarmic_32::GetReg(int index) const { - return jit->Regs()[index]; + return jit.load()->Regs()[index]; } void ARM_Dynarmic_32::SetReg(int index, u64 value) { - jit->Regs()[index] = static_cast(value); + jit.load()->Regs()[index] = static_cast(value); } u128 ARM_Dynarmic_32::GetVectorReg(int index) const { @@ -276,11 +283,11 @@ u128 ARM_Dynarmic_32::GetVectorReg(int index) const { void ARM_Dynarmic_32::SetVectorReg(int index, u128 value) {} u32 ARM_Dynarmic_32::GetPSTATE() const { - return jit->Cpsr(); + return jit.load()->Cpsr(); } void ARM_Dynarmic_32::SetPSTATE(u32 cpsr) { - jit->SetCpsr(cpsr); + jit.load()->SetCpsr(cpsr); } u64 ARM_Dynarmic_32::GetTlsAddress() const { @@ -301,7 +308,7 @@ void ARM_Dynarmic_32::SetTPIDR_EL0(u64 value) { void ARM_Dynarmic_32::SaveContext(ThreadContext32& ctx) { Dynarmic::A32::Context context; - jit->SaveContext(context); + jit.load()->SaveContext(context); ctx.cpu_registers = context.Regs(); ctx.extension_registers = context.ExtRegs(); ctx.cpsr = context.Cpsr(); @@ -314,27 +321,27 @@ void ARM_Dynarmic_32::LoadContext(const ThreadContext32& ctx) { context.ExtRegs() = ctx.extension_registers; context.SetCpsr(ctx.cpsr); context.SetFpscr(ctx.fpscr); - jit->LoadContext(context); + jit.load()->LoadContext(context); } void ARM_Dynarmic_32::PrepareReschedule() { - jit->HaltExecution(break_loop); + jit.load()->HaltExecution(break_loop); } void ARM_Dynarmic_32::SignalInterrupt() { - jit->HaltExecution(break_loop); + jit.load()->HaltExecution(break_loop); } void ARM_Dynarmic_32::ClearInstructionCache() { - jit->ClearCache(); + jit.load()->ClearCache(); } void ARM_Dynarmic_32::InvalidateCacheRange(VAddr addr, std::size_t size) { - jit->InvalidateCacheRange(static_cast(addr), size); + jit.load()->InvalidateCacheRange(static_cast(addr), size); } void ARM_Dynarmic_32::ClearExclusiveState() { - jit->ClearExclusiveState(); + jit.load()->ClearExclusiveState(); } void ARM_Dynarmic_32::PageTableChanged(Common::PageTable& page_table, @@ -345,13 +352,14 @@ void ARM_Dynarmic_32::PageTableChanged(Common::PageTable& page_table, auto key = std::make_pair(&page_table, new_address_space_size_in_bits); auto iter = jit_cache.find(key); if (iter != jit_cache.end()) { - jit = iter->second; + jit.store(iter->second.get()); LoadContext(ctx); return; } - jit = MakeJit(&page_table); + std::shared_ptr new_jit = MakeJit(&page_table); + jit.store(new_jit.get()); LoadContext(ctx); - jit_cache.emplace(key, jit); + jit_cache.emplace(key, std::move(new_jit)); } } // namespace Core diff --git a/src/core/arm/dynarmic/arm_dynarmic_32.h b/src/core/arm/dynarmic/arm_dynarmic_32.h index 3f68a4ff1..684937353 100644 --- a/src/core/arm/dynarmic/arm_dynarmic_32.h +++ b/src/core/arm/dynarmic/arm_dynarmic_32.h @@ -4,6 +4,7 @@ #pragma once +#include #include #include @@ -80,7 +81,11 @@ private: std::shared_ptr cp15; std::size_t core_index; DynarmicExclusiveMonitor& exclusive_monitor; - std::shared_ptr jit; + + std::shared_ptr null_jit; + + // A raw pointer here is fine; we never delete Jit instances. + std::atomic jit; // SVC callback u32 svc_swi{}; diff --git a/src/core/arm/dynarmic/arm_dynarmic_64.cpp b/src/core/arm/dynarmic/arm_dynarmic_64.cpp index 68822a1fc..7261f0f67 100644 --- a/src/core/arm/dynarmic/arm_dynarmic_64.cpp +++ b/src/core/arm/dynarmic/arm_dynarmic_64.cpp @@ -109,7 +109,7 @@ public: break; } - parent.jit->HaltExecution(Dynarmic::HaltReason::CacheInvalidation); + parent.jit.load()->HaltExecution(Dynarmic::HaltReason::CacheInvalidation); } void ExceptionRaised(u64 pc, Dynarmic::A64::Exception exception) override { @@ -130,7 +130,7 @@ public: void CallSVC(u32 swi) override { parent.svc_swi = swi; - parent.jit->HaltExecution(svc_call); + parent.jit.load()->HaltExecution(svc_call); } void AddTicks(u64 ticks) override { @@ -212,6 +212,13 @@ std::shared_ptr ARM_Dynarmic_64::MakeJit(Common::PageTable* config.code_cache_size = 512_MiB; config.far_code_offset = 400_MiB; + // null_jit + if (!page_table) { + // Don't waste too much memory on null_jit + config.code_cache_size = 8_MiB; + config.far_code_offset = 4_MiB; + } + // Safe optimizations if (Settings::values.cpu_debug_mode) { if (!Settings::values.cpuopt_page_tables) { @@ -289,7 +296,7 @@ std::shared_ptr ARM_Dynarmic_64::MakeJit(Common::PageTable* void ARM_Dynarmic_64::Run() { while (true) { - const auto hr = jit->Run(); + const auto hr = jit.load()->Run(); if (Has(hr, svc_call)) { Kernel::Svc::Call(system, svc_swi); } @@ -300,7 +307,7 @@ void ARM_Dynarmic_64::Run() { } void ARM_Dynarmic_64::Step() { - jit->Step(); + jit.load()->Step(); } ARM_Dynarmic_64::ARM_Dynarmic_64(System& system_, CPUInterrupts& interrupt_handlers_, @@ -309,40 +316,40 @@ ARM_Dynarmic_64::ARM_Dynarmic_64(System& system_, CPUInterrupts& interrupt_handl : ARM_Interface{system_, interrupt_handlers_, uses_wall_clock_}, cb(std::make_unique(*this)), core_index{core_index_}, exclusive_monitor{dynamic_cast(exclusive_monitor_)}, - jit(MakeJit(nullptr, 48)) {} + null_jit{MakeJit(nullptr, 48)}, jit{null_jit.get()} {} ARM_Dynarmic_64::~ARM_Dynarmic_64() = default; void ARM_Dynarmic_64::SetPC(u64 pc) { - jit->SetPC(pc); + jit.load()->SetPC(pc); } u64 ARM_Dynarmic_64::GetPC() const { - return jit->GetPC(); + return jit.load()->GetPC(); } u64 ARM_Dynarmic_64::GetReg(int index) const { - return jit->GetRegister(index); + return jit.load()->GetRegister(index); } void ARM_Dynarmic_64::SetReg(int index, u64 value) { - jit->SetRegister(index, value); + jit.load()->SetRegister(index, value); } u128 ARM_Dynarmic_64::GetVectorReg(int index) const { - return jit->GetVector(index); + return jit.load()->GetVector(index); } void ARM_Dynarmic_64::SetVectorReg(int index, u128 value) { - jit->SetVector(index, value); + jit.load()->SetVector(index, value); } u32 ARM_Dynarmic_64::GetPSTATE() const { - return jit->GetPstate(); + return jit.load()->GetPstate(); } void ARM_Dynarmic_64::SetPSTATE(u32 pstate) { - jit->SetPstate(pstate); + jit.load()->SetPstate(pstate); } u64 ARM_Dynarmic_64::GetTlsAddress() const { @@ -362,45 +369,47 @@ void ARM_Dynarmic_64::SetTPIDR_EL0(u64 value) { } void ARM_Dynarmic_64::SaveContext(ThreadContext64& ctx) { - ctx.cpu_registers = jit->GetRegisters(); - ctx.sp = jit->GetSP(); - ctx.pc = jit->GetPC(); - ctx.pstate = jit->GetPstate(); - ctx.vector_registers = jit->GetVectors(); - ctx.fpcr = jit->GetFpcr(); - ctx.fpsr = jit->GetFpsr(); + Dynarmic::A64::Jit* j = jit.load(); + ctx.cpu_registers = j->GetRegisters(); + ctx.sp = j->GetSP(); + ctx.pc = j->GetPC(); + ctx.pstate = j->GetPstate(); + ctx.vector_registers = j->GetVectors(); + ctx.fpcr = j->GetFpcr(); + ctx.fpsr = j->GetFpsr(); ctx.tpidr = cb->tpidr_el0; } void ARM_Dynarmic_64::LoadContext(const ThreadContext64& ctx) { - jit->SetRegisters(ctx.cpu_registers); - jit->SetSP(ctx.sp); - jit->SetPC(ctx.pc); - jit->SetPstate(ctx.pstate); - jit->SetVectors(ctx.vector_registers); - jit->SetFpcr(ctx.fpcr); - jit->SetFpsr(ctx.fpsr); + Dynarmic::A64::Jit* j = jit.load(); + j->SetRegisters(ctx.cpu_registers); + j->SetSP(ctx.sp); + j->SetPC(ctx.pc); + j->SetPstate(ctx.pstate); + j->SetVectors(ctx.vector_registers); + j->SetFpcr(ctx.fpcr); + j->SetFpsr(ctx.fpsr); SetTPIDR_EL0(ctx.tpidr); } void ARM_Dynarmic_64::PrepareReschedule() { - jit->HaltExecution(break_loop); + jit.load()->HaltExecution(break_loop); } void ARM_Dynarmic_64::SignalInterrupt() { - jit->HaltExecution(break_loop); + jit.load()->HaltExecution(break_loop); } void ARM_Dynarmic_64::ClearInstructionCache() { - jit->ClearCache(); + jit.load()->ClearCache(); } void ARM_Dynarmic_64::InvalidateCacheRange(VAddr addr, std::size_t size) { - jit->InvalidateCacheRange(addr, size); + jit.load()->InvalidateCacheRange(addr, size); } void ARM_Dynarmic_64::ClearExclusiveState() { - jit->ClearExclusiveState(); + jit.load()->ClearExclusiveState(); } void ARM_Dynarmic_64::PageTableChanged(Common::PageTable& page_table, @@ -411,13 +420,14 @@ void ARM_Dynarmic_64::PageTableChanged(Common::PageTable& page_table, auto key = std::make_pair(&page_table, new_address_space_size_in_bits); auto iter = jit_cache.find(key); if (iter != jit_cache.end()) { - jit = iter->second; + jit.store(iter->second.get()); LoadContext(ctx); return; } - jit = MakeJit(&page_table, new_address_space_size_in_bits); + std::shared_ptr new_jit = MakeJit(&page_table, new_address_space_size_in_bits); + jit.store(new_jit.get()); LoadContext(ctx); - jit_cache.emplace(key, jit); + jit_cache.emplace(key, std::move(new_jit)); } } // namespace Core diff --git a/src/core/arm/dynarmic/arm_dynarmic_64.h b/src/core/arm/dynarmic/arm_dynarmic_64.h index 58bc7fbec..86018f196 100644 --- a/src/core/arm/dynarmic/arm_dynarmic_64.h +++ b/src/core/arm/dynarmic/arm_dynarmic_64.h @@ -4,6 +4,7 @@ #pragma once +#include #include #include @@ -74,7 +75,10 @@ private: std::size_t core_index; DynarmicExclusiveMonitor& exclusive_monitor; - std::shared_ptr jit; + std::shared_ptr null_jit; + + // A raw pointer here is fine; we never delete Jit instances. + std::atomic jit; // SVC callback u32 svc_swi{};