[core/memory] Remove defered heap allocation on Linux. (#2587)

Authored-by: weakboson <weakboson@eden-emu.dev>
Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2587
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

7 files changed, 6 insertions, 97 deletions

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 452e5f42e4..4bf1f851c0 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -1231,7 +1231,6 @@ endif()
 
 if (ARCHITECTURE_x86_64 OR ARCHITECTURE_arm64)
     target_sources(core PRIVATE
-        arm/dynarmic/arm_dynarmic.cpp
         arm/dynarmic/arm_dynarmic.h
         arm/dynarmic/arm_dynarmic_64.cpp
         arm/dynarmic/arm_dynarmic_64.h
diff --git a/src/core/arm/dynarmic/arm_dynarmic.cpp b/src/core/arm/dynarmic/arm_dynarmic.cpp
deleted file mode 100644
index e6e9fc45be..0000000000
--- a/src/core/arm/dynarmic/arm_dynarmic.cpp
+++ /dev/null
@@ -1,49 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#ifdef __linux__
-
-#include "common/signal_chain.h"
-
-#include "core/arm/dynarmic/arm_dynarmic.h"
-#include "core/hle/kernel/k_process.h"
-#include "core/memory.h"
-
-namespace Core {
-
-namespace {
-
-thread_local Core::Memory::Memory* g_current_memory{};
-std::once_flag g_registered{};
-struct sigaction g_old_segv {};
-
-void HandleSigSegv(int sig, siginfo_t* info, void* ctx) {
-    if (g_current_memory && g_current_memory->InvalidateSeparateHeap(info->si_addr)) {
-        return;
-    }
-
-    return g_old_segv.sa_sigaction(sig, info, ctx);
-}
-
-} // namespace
-
-ScopedJitExecution::ScopedJitExecution(Kernel::KProcess* process) {
-    g_current_memory = std::addressof(process->GetMemory());
-}
-
-ScopedJitExecution::~ScopedJitExecution() {
-    g_current_memory = nullptr;
-}
-
-void ScopedJitExecution::RegisterHandler() {
-    std::call_once(g_registered, [] {
-        struct sigaction sa {};
-        sa.sa_sigaction = &HandleSigSegv;
-        sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
-        Common::SigAction(SIGSEGV, std::addressof(sa), std::addressof(g_old_segv));
-    });
-}
-
-} // namespace Core
-
-#endif
diff --git a/src/core/arm/dynarmic/arm_dynarmic.h b/src/core/arm/dynarmic/arm_dynarmic.h
index 53dd188151..0633a9eb5a 100644
--- a/src/core/arm/dynarmic/arm_dynarmic.h
+++ b/src/core/arm/dynarmic/arm_dynarmic.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -26,24 +29,4 @@ constexpr HaltReason TranslateHaltReason(Dynarmic::HaltReason hr) {
     return static_cast<HaltReason>(hr);
 }
 
-#ifdef __linux__
-
-class ScopedJitExecution {
-public:
-    explicit ScopedJitExecution(Kernel::KProcess* process);
-    ~ScopedJitExecution();
-    static void RegisterHandler();
-};
-
-#else
-
-class ScopedJitExecution {
-public:
-    explicit ScopedJitExecution(Kernel::KProcess* process) {}
-    ~ScopedJitExecution() {}
-    static void RegisterHandler() {}
-};
-
-#endif
-
 } // namespace Core
diff --git a/src/core/arm/dynarmic/arm_dynarmic_32.cpp b/src/core/arm/dynarmic/arm_dynarmic_32.cpp
index a5d2e1928d..5fcc928b86 100644
--- a/src/core/arm/dynarmic/arm_dynarmic_32.cpp
+++ b/src/core/arm/dynarmic/arm_dynarmic_32.cpp
@@ -341,15 +341,11 @@ bool ArmDynarmic32::IsInThumbMode() const {
 }
 
 HaltReason ArmDynarmic32::RunThread(Kernel::KThread* thread) {
-    ScopedJitExecution sj(thread->GetOwnerProcess());
-
     m_jit->ClearExclusiveState();
     return TranslateHaltReason(m_jit->Run());
 }
 
 HaltReason ArmDynarmic32::StepThread(Kernel::KThread* thread) {
-    ScopedJitExecution sj(thread->GetOwnerProcess());
-
     m_jit->ClearExclusiveState();
     return TranslateHaltReason(m_jit->Step());
 }
@@ -391,7 +387,6 @@ ArmDynarmic32::ArmDynarmic32(System& system, bool uses_wall_clock, Kernel::KProc
       m_cp15(std::make_shared<DynarmicCP15>(*this)), m_core_index{core_index} {
     auto& page_table_impl = process->GetPageTable().GetBasePageTable().GetImpl();
     m_jit = MakeJit(&page_table_impl);
-    ScopedJitExecution::RegisterHandler();
 }
 
 ArmDynarmic32::~ArmDynarmic32() = default;
diff --git a/src/core/arm/dynarmic/arm_dynarmic_64.cpp b/src/core/arm/dynarmic/arm_dynarmic_64.cpp
index 5ca91f0e1e..55975f4cdc 100644
--- a/src/core/arm/dynarmic/arm_dynarmic_64.cpp
+++ b/src/core/arm/dynarmic/arm_dynarmic_64.cpp
@@ -372,15 +372,11 @@ std::shared_ptr<Dynarmic::A64::Jit> ArmDynarmic64::MakeJit(Common::PageTable* pa
 }
 
 HaltReason ArmDynarmic64::RunThread(Kernel::KThread* thread) {
-    ScopedJitExecution sj(thread->GetOwnerProcess());
-
     m_jit->ClearExclusiveState();
     return TranslateHaltReason(m_jit->Run());
 }
 
 HaltReason ArmDynarmic64::StepThread(Kernel::KThread* thread) {
-    ScopedJitExecution sj(thread->GetOwnerProcess());
-
     m_jit->ClearExclusiveState();
     return TranslateHaltReason(m_jit->Step());
 }
@@ -420,7 +416,6 @@ ArmDynarmic64::ArmDynarmic64(System& system, bool uses_wall_clock, Kernel::KProc
     auto& page_table = process->GetPageTable().GetBasePageTable();
     auto& page_table_impl = page_table.GetImpl();
     m_jit = MakeJit(&page_table_impl, page_table.GetAddressSpaceWidth());
-    ScopedJitExecution::RegisterHandler();
 }
 
 ArmDynarmic64::~ArmDynarmic64() = default;
diff --git a/src/core/memory.cpp b/src/core/memory.cpp
index 2583aae867..4f1854a2e5 100644
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@@ -1230,22 +1230,7 @@ bool Memory::InvalidateNCE(Common::ProcessAddress vaddr, size_t size) {
     if (rasterizer) {
         impl->InvalidateGPUMemory(ptr, size);
     }
-
-#ifdef __linux__
-    if (!rasterizer && mapped) {
-        impl->buffer->DeferredMapSeparateHeap(GetInteger(vaddr));
-    }
-#endif
-
     return mapped && ptr != nullptr;
 }
 
-bool Memory::InvalidateSeparateHeap(void* fault_address) {
-#ifdef __linux__
-    return impl->buffer->DeferredMapSeparateHeap(static_cast<u8*>(fault_address));
-#else
-    return false;
-#endif
-}
-
 } // namespace Core::Memory
diff --git a/src/core/memory.h b/src/core/memory.h
index dcca26892b..c23b41a111 100644
--- a/src/core/memory.h
+++ b/src/core/memory.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2014 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -492,8 +495,6 @@ public:
 
     bool InvalidateNCE(Common::ProcessAddress vaddr, size_t size);
 
-    bool InvalidateSeparateHeap(void* fault_address);
-
 private:
     Core::System& system;