core: track separate heap allocation for linux

src/common/CMakeLists.txt

@@ -64,6 +64,8 @@ add_library(common STATIC
     fs/path_util.cpp
     fs/path_util.h
     hash.h
+    heap_tracker.cpp
+    heap_tracker.h
     hex_util.cpp
     hex_util.h
     host_memory.cpp

src/common/heap_tracker.cpp

@@ -0,0 +1,263 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <algorithm>
+#include <vector>
+
+#include "common/heap_tracker.h"
+#include "common/logging/log.h"
+
+namespace Common {
+
+namespace {
+
+constexpr s64 MaxResidentMapCount = 0x8000;
+
+} // namespace
+
+HeapTracker::HeapTracker(Common::HostMemory& buffer) : m_buffer(buffer) {}
+HeapTracker::~HeapTracker() = default;
+
+void HeapTracker::Map(size_t virtual_offset, size_t host_offset, size_t length,
+                      MemoryPermission perm, bool is_separate_heap) {
+    // When mapping other memory, map pages immediately.
+    if (!is_separate_heap) {
+        m_buffer.Map(virtual_offset, host_offset, length, perm, false);
+        return;
+    }
+
+    {
+        // We are mapping part of a separate heap.
+        std::scoped_lock lk{m_lock};
+
+        auto* const map = new SeparateHeapMap{
+            .vaddr = virtual_offset,
+            .paddr = host_offset,
+            .size = length,
+            .tick = m_tick++,
+            .perm = perm,
+            .is_resident = false,
+        };
+
+        // Insert into mappings.
+        m_map_count++;
+        m_mappings.insert(*map);
+    }
+
+    // Finally, map.
+    this->DeferredMapSeparateHeap(virtual_offset);
+}
+
+void HeapTracker::Unmap(size_t virtual_offset, size_t size, bool is_separate_heap) {
+    // If this is a separate heap...
+    if (is_separate_heap) {
+        std::scoped_lock lk{m_lock};
+
+        const SeparateHeapMap key{
+            .vaddr = virtual_offset,
+        };
+
+        // Split at the boundaries of the region we are removing.
+        this->SplitHeapMapLocked(virtual_offset);
+        this->SplitHeapMapLocked(virtual_offset + size);
+
+        // Erase all mappings in range.
+        auto it = m_mappings.find(key);
+        while (it != m_mappings.end() && it->vaddr < virtual_offset + size) {
+            // Get underlying item.
+            auto* const item = std::addressof(*it);
+
+            // If resident, erase from resident map.
+            if (item->is_resident) {
+                ASSERT(--m_resident_map_count >= 0);
+                m_resident_mappings.erase(m_resident_mappings.iterator_to(*item));
+            }
+
+            // Erase from map.
+            it = m_mappings.erase(it);
+            ASSERT(--m_map_count >= 0);
+
+            // Free the item.
+            delete item;
+        }
+    }
+
+    // Unmap pages.
+    m_buffer.Unmap(virtual_offset, size, false);
+}
+
+void HeapTracker::Protect(size_t virtual_offset, size_t size, MemoryPermission perm) {
+    // Ensure no rebuild occurs while reprotecting.
+    std::shared_lock lk{m_rebuild_lock};
+
+    // Split at the boundaries of the region we are reprotecting.
+    this->SplitHeapMap(virtual_offset, size);
+
+    // Declare tracking variables.
+    VAddr cur = virtual_offset;
+    VAddr end = virtual_offset + size;
+
+    while (cur < end) {
+        VAddr next = cur;
+        bool should_protect = false;
+
+        {
+            std::scoped_lock lk2{m_lock};
+
+            const SeparateHeapMap key{
+                .vaddr = next,
+            };
+
+            // Try to get the next mapping corresponding to this address.
+            const auto it = m_mappings.nfind(key);
+
+            if (it == m_mappings.end()) {
+                // There are no separate heap mappings remaining.
+                next = end;
+                should_protect = true;
+            } else if (it->vaddr == cur) {
+                // We are in range.
+                // Update permission bits.
+                it->perm = perm;
+
+                // Determine next address and whether we should protect.
+                next = cur + it->size;
+                should_protect = it->is_resident;
+            } else /* if (it->vaddr > cur) */ {
+                // We weren't in range, but there is a block coming up that will be.
+                next = it->vaddr;
+                should_protect = true;
+            }
+        }
+
+        // Clamp to end.
+        next = std::min(next, end);
+
+        // Reprotect, if we need to.
+        if (should_protect) {
+            m_buffer.Protect(cur, next - cur, perm);
+        }
+
+        // Advance.
+        cur = next;
+    }
+}
+
+bool HeapTracker::DeferredMapSeparateHeap(u8* fault_address) {
+    if (m_buffer.IsInVirtualRange(fault_address)) {
+        return this->DeferredMapSeparateHeap(fault_address - m_buffer.VirtualBasePointer());
+    }
+
+    return false;
+}
+
+bool HeapTracker::DeferredMapSeparateHeap(size_t virtual_offset) {
+    bool rebuild_required = false;
+
+    {
+        std::scoped_lock lk{m_lock};
+
+        // Check to ensure this was a non-resident separate heap mapping.
+        const auto it = this->GetNearestHeapMapLocked(virtual_offset);
+        if (it == m_mappings.end() || it->is_resident) {
+            return false;
+        }
+
+        // Update tick before possible rebuild.
+        it->tick = m_tick++;
+
+        // Check if we need to rebuild.
+        if (m_resident_map_count > MaxResidentMapCount) {
+            rebuild_required = true;
+        }
+
+        // Map the area.
+        m_buffer.Map(it->vaddr, it->paddr, it->size, it->perm, false);
+
+        // This map is now resident.
+        it->is_resident = true;
+        m_resident_map_count++;
+        m_resident_mappings.insert(*it);
+    }
+
+    if (rebuild_required) {
+        // A rebuild was required, so perform it now.
+        this->RebuildSeparateHeapAddressSpace();
+    }
+
+    return true;
+}
+
+void HeapTracker::RebuildSeparateHeapAddressSpace() {
+    std::scoped_lock lk{m_rebuild_lock, m_lock};
+
+    ASSERT(!m_resident_mappings.empty());
+
+    // Unmap so we have at least 4 maps available.
+    const size_t desired_count = std::min(m_resident_map_count, MaxResidentMapCount - 4);
+    const size_t evict_count = m_resident_map_count - desired_count;
+    auto it = m_resident_mappings.begin();
+
+    for (size_t i = 0; i < evict_count && it != m_resident_mappings.end(); i++) {
+        // Unmark and unmap.
+        it->is_resident = false;
+        m_buffer.Unmap(it->vaddr, it->size, false);
+
+        // Advance.
+        ASSERT(--m_resident_map_count >= 0);
+        it = m_resident_mappings.erase(it);
+    }
+}
+
+void HeapTracker::SplitHeapMap(VAddr offset, size_t size) {
+    std::scoped_lock lk{m_lock};
+
+    this->SplitHeapMapLocked(offset);
+    this->SplitHeapMapLocked(offset + size);
+}
+
+void HeapTracker::SplitHeapMapLocked(VAddr offset) {
+    const auto it = this->GetNearestHeapMapLocked(offset);
+    if (it == m_mappings.end() || it->vaddr == offset) {
+        // Not contained or no split required.
+        return;
+    }
+
+    // Cache the original values.
+    auto* const left = std::addressof(*it);
+    const size_t orig_size = left->size;
+
+    // Adjust the left map.
+    const size_t left_size = offset - left->vaddr;
+    left->size = left_size;
+
+    // Create the new right map.
+    auto* const right = new SeparateHeapMap{
+        .vaddr = left->vaddr + left_size,
+        .paddr = left->paddr + left_size,
+        .size = orig_size - left_size,
+        .tick = left->tick,
+        .perm = left->perm,
+        .is_resident = left->is_resident,
+    };
+
+    // Insert the new right map.
+    m_map_count++;
+    m_mappings.insert(*right);
+
+    // If resident, also insert into resident map.
+    if (right->is_resident) {
+        m_resident_mappings.insert(*right);
+        m_resident_map_count++;
+    }
+}
+
+HeapTracker::AddrTree::iterator HeapTracker::GetNearestHeapMapLocked(VAddr offset) {
+    const SeparateHeapMap key{
+        .vaddr = offset,
+    };
+
+    return m_mappings.find(key);
+}
+
+} // namespace Common

src/common/heap_tracker.h

@@ -0,0 +1,97 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <atomic>
+#include <mutex>
+#include <set>
+#include <shared_mutex>
+
+#include "common/host_memory.h"
+#include "common/intrusive_red_black_tree.h"
+
+namespace Common {
+
+struct SeparateHeapMap {
+    Common::IntrusiveRedBlackTreeNode addr_node{};
+    Common::IntrusiveRedBlackTreeNode tick_node{};
+    VAddr vaddr{};
+    PAddr paddr{};
+    size_t size{};
+    size_t tick{};
+    MemoryPermission perm{};
+    bool is_resident{};
+};
+
+struct SeparateHeapMapAddrComparator {
+    static constexpr int Compare(const SeparateHeapMap& lhs, const SeparateHeapMap& rhs) {
+        if (lhs.vaddr < rhs.vaddr) {
+            return -1;
+        } else if (lhs.vaddr <= (rhs.vaddr + rhs.size - 1)) {
+            return 0;
+        } else {
+            return 1;
+        }
+    }
+};
+
+struct SeparateHeapMapTickComparator {
+    static constexpr int Compare(const SeparateHeapMap& lhs, const SeparateHeapMap& rhs) {
+        if (lhs.tick < rhs.tick) {
+            return -1;
+        } else if (lhs.tick > rhs.tick) {
+            return 1;
+        } else {
+            return SeparateHeapMapAddrComparator::Compare(lhs, rhs);
+        }
+    }
+};
+
+class HeapTracker {
+public:
+    explicit HeapTracker(Common::HostMemory& buffer);
+    ~HeapTracker();
+
+    void Map(size_t virtual_offset, size_t host_offset, size_t length, MemoryPermission perm,
+             bool is_separate_heap);
+    void Unmap(size_t virtual_offset, size_t size, bool is_separate_heap);
+    void Protect(size_t virtual_offset, size_t length, MemoryPermission perm);
+    u8* VirtualBasePointer() {
+        return m_buffer.VirtualBasePointer();
+    }
+
+    bool DeferredMapSeparateHeap(u8* fault_address);
+    bool DeferredMapSeparateHeap(size_t virtual_offset);
+
+private:
+    using AddrTreeTraits =
+        Common::IntrusiveRedBlackTreeMemberTraitsDeferredAssert<&SeparateHeapMap::addr_node>;
+    using AddrTree = AddrTreeTraits::TreeType<SeparateHeapMapAddrComparator>;
+
+    using TickTreeTraits =
+        Common::IntrusiveRedBlackTreeMemberTraitsDeferredAssert<&SeparateHeapMap::tick_node>;
+    using TickTree = TickTreeTraits::TreeType<SeparateHeapMapTickComparator>;
+
+    AddrTree m_mappings{};
+    TickTree m_resident_mappings{};
+
+private:
+    void SplitHeapMap(VAddr offset, size_t size);
+    void SplitHeapMapLocked(VAddr offset);
+
+    AddrTree::iterator GetNearestHeapMapLocked(VAddr offset);
+
+    void RebuildSeparateHeapAddressSpace();
+
+private:
+    Common::HostMemory& m_buffer;
+
+    std::shared_mutex m_rebuild_lock{};
+    std::mutex m_lock{};
+    s64 m_map_count{};
+    s64 m_resident_map_count{};
+    size_t m_tick{};
+};
+
+} // namespace Common

src/common/host_memory.cpp

@@ -679,7 +679,7 @@ HostMemory::HostMemory(HostMemory&&) noexcept = default;
 HostMemory& HostMemory::operator=(HostMemory&&) noexcept = default;
 
 void HostMemory::Map(size_t virtual_offset, size_t host_offset, size_t length,
-                     MemoryPermission perms) {
+                     MemoryPermission perms, bool separate_heap) {
     ASSERT(virtual_offset % PageAlignment == 0);
     ASSERT(host_offset % PageAlignment == 0);
     ASSERT(length % PageAlignment == 0);
@@ -691,7 +691,7 @@ void HostMemory::Map(size_t virtual_offset, size_t host_offset, size_t length,
     impl->Map(virtual_offset + virtual_base_offset, host_offset, length, perms);
 }
 
-void HostMemory::Unmap(size_t virtual_offset, size_t length) {
+void HostMemory::Unmap(size_t virtual_offset, size_t length, bool separate_heap) {
     ASSERT(virtual_offset % PageAlignment == 0);
     ASSERT(length % PageAlignment == 0);
     ASSERT(virtual_offset + length <= virtual_size);
@@ -701,14 +701,16 @@ void HostMemory::Unmap(size_t virtual_offset, size_t length) {
     impl->Unmap(virtual_offset + virtual_base_offset, length);
 }
 
-void HostMemory::Protect(size_t virtual_offset, size_t length, bool read, bool write,
+void HostMemory::Protect(size_t virtual_offset, size_t length, MemoryPermission perm) {
-                         bool execute) {
     ASSERT(virtual_offset % PageAlignment == 0);
     ASSERT(length % PageAlignment == 0);
     ASSERT(virtual_offset + length <= virtual_size);
     if (length == 0 || !virtual_base || !impl) {
         return;
     }
+    const bool read = True(perm & MemoryPermission::Read);
+    const bool write = True(perm & MemoryPermission::Write);
+    const bool execute = True(perm & MemoryPermission::Execute);
     impl->Protect(virtual_offset + virtual_base_offset, length, read, write, execute);
 }
 

src/common/host_memory.h

@@ -40,11 +40,12 @@ public:
     HostMemory(HostMemory&& other) noexcept;
     HostMemory& operator=(HostMemory&& other) noexcept;
 
-    void Map(size_t virtual_offset, size_t host_offset, size_t length, MemoryPermission perms);
+    void Map(size_t virtual_offset, size_t host_offset, size_t length, MemoryPermission perms,
+             bool separate_heap);
 
-    void Unmap(size_t virtual_offset, size_t length);
+    void Unmap(size_t virtual_offset, size_t length, bool separate_heap);
 
-    void Protect(size_t virtual_offset, size_t length, bool read, bool write, bool execute = false);
+    void Protect(size_t virtual_offset, size_t length, MemoryPermission perms);
 
     void EnableDirectMappedAddress();
 
@@ -64,6 +65,10 @@ public:
         return virtual_base;
     }
 
+    bool IsInVirtualRange(void* address) const noexcept {
+        return address >= virtual_base && address < virtual_base + virtual_size;
+    }
+
 private:
     size_t backing_size{};
     size_t virtual_size{};

src/core/CMakeLists.txt

@@ -978,6 +978,7 @@ 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

src/core/arm/dynarmic/arm_dynarmic.cpp

@@ -0,0 +1,49 @@
+// 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

src/core/arm/dynarmic/arm_dynarmic.h

@@ -26,4 +26,24 @@ 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

src/core/arm/dynarmic/arm_dynarmic_32.cpp

@@ -331,11 +331,15 @@ 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());
 }
@@ -377,6 +381,7 @@ 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;

src/core/arm/dynarmic/arm_dynarmic_64.cpp

@@ -362,11 +362,15 @@ 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());
 }
@@ -406,6 +410,7 @@ 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;

src/core/hle/kernel/k_page_table_base.cpp

@@ -434,7 +434,7 @@ Result KPageTableBase::InitializeForProcess(Svc::CreateProcessFlag as_type, bool
 void KPageTableBase::Finalize() {
     auto HostUnmapCallback = [&](KProcessAddress addr, u64 size) {
         if (Settings::IsFastmemEnabled()) {
-            m_system.DeviceMemory().buffer.Unmap(GetInteger(addr), size);
+            m_system.DeviceMemory().buffer.Unmap(GetInteger(addr), size, false);
         }
     };
 
@@ -5243,7 +5243,7 @@ Result KPageTableBase::MapPhysicalMemory(KProcessAddress address, size_t size) {
                                 // Unmap.
                                 R_ASSERT(this->Operate(updater.GetPageList(), cur_address,
                                                        cur_pages, 0, false, unmap_properties,
-                                                       OperationType::Unmap, true));
+                                                       OperationType::UnmapPhysical, true));
                             }
 
                             // Check if we're done.
@@ -5326,7 +5326,7 @@ Result KPageTableBase::MapPhysicalMemory(KProcessAddress address, size_t size) {
                             // Map the papges.
                             R_TRY(this->Operate(updater.GetPageList(), cur_address, map_pages,
                                                 cur_pg, map_properties,
-                                                OperationType::MapFirstGroup, false));
+                                                OperationType::MapFirstGroupPhysical, false));
                         }
                     }
 
@@ -5480,7 +5480,7 @@ Result KPageTableBase::UnmapPhysicalMemory(KProcessAddress address, size_t size)
 
             // Unmap.
             R_ASSERT(this->Operate(updater.GetPageList(), cur_address, cur_pages, 0, false,
-                                   unmap_properties, OperationType::Unmap, false));
+                                   unmap_properties, OperationType::UnmapPhysical, false));
         }
 
         // Check if we're done.
@@ -5655,7 +5655,10 @@ Result KPageTableBase::Operate(PageLinkedList* page_list, KProcessAddress virt_a
     // or free them to the page list, and so it goes unused (along with page properties).
 
     switch (operation) {
-    case OperationType::Unmap: {
+    case OperationType::Unmap:
+    case OperationType::UnmapPhysical: {
+        const bool separate_heap = operation == OperationType::UnmapPhysical;
+
         // Ensure that any pages we track are closed on exit.
         KPageGroup pages_to_close(m_kernel, this->GetBlockInfoManager());
         SCOPE_EXIT({ pages_to_close.CloseAndReset(); });
@@ -5664,7 +5667,7 @@ Result KPageTableBase::Operate(PageLinkedList* page_list, KProcessAddress virt_a
         this->MakePageGroup(pages_to_close, virt_addr, num_pages);
 
         // Unmap.
-        m_memory->UnmapRegion(*m_impl, virt_addr, num_pages * PageSize);
+        m_memory->UnmapRegion(*m_impl, virt_addr, num_pages * PageSize, separate_heap);
 
         R_SUCCEED();
     }
@@ -5672,7 +5675,7 @@ Result KPageTableBase::Operate(PageLinkedList* page_list, KProcessAddress virt_a
         ASSERT(virt_addr != 0);
         ASSERT(Common::IsAligned(GetInteger(virt_addr), PageSize));
         m_memory->MapMemoryRegion(*m_impl, virt_addr, num_pages * PageSize, phys_addr,
-                                  ConvertToMemoryPermission(properties.perm));
+                                  ConvertToMemoryPermission(properties.perm), false);
 
         // Open references to pages, if we should.
         if (this->IsHeapPhysicalAddress(phys_addr)) {
@@ -5711,16 +5714,19 @@ Result KPageTableBase::Operate(PageLinkedList* page_list, KProcessAddress virt_a
 
     switch (operation) {
     case OperationType::MapGroup:
-    case OperationType::MapFirstGroup: {
+    case OperationType::MapFirstGroup:
+    case OperationType::MapFirstGroupPhysical: {
+        const bool separate_heap = operation == OperationType::MapFirstGroupPhysical;
+
         // We want to maintain a new reference to every page in the group.
-        KScopedPageGroup spg(page_group, operation != OperationType::MapFirstGroup);
+        KScopedPageGroup spg(page_group, operation == OperationType::MapGroup);
 
         for (const auto& node : page_group) {
             const size_t size{node.GetNumPages() * PageSize};
 
             // Map the pages.
             m_memory->MapMemoryRegion(*m_impl, virt_addr, size, node.GetAddress(),
-                                      ConvertToMemoryPermission(properties.perm));
+                                      ConvertToMemoryPermission(properties.perm), separate_heap);
 
             virt_addr += size;
         }

src/core/hle/kernel/k_page_table_base.h

@@ -104,6 +104,9 @@ protected:
         ChangePermissionsAndRefresh = 5,
         ChangePermissionsAndRefreshAndFlush = 6,
         Separate = 7,
+
+        MapFirstGroupPhysical = 65000,
+        UnmapPhysical = 65001,
     };
 
     static constexpr size_t MaxPhysicalMapAlignment = 1_GiB;

src/core/hle/kernel/k_process.cpp

@@ -1237,8 +1237,10 @@ void KProcess::LoadModule(CodeSet code_set, KProcessAddress base_addr) {
         auto& buffer = m_kernel.System().DeviceMemory().buffer;
         const auto& code = code_set.CodeSegment();
         const auto& patch = code_set.PatchSegment();
-        buffer.Protect(GetInteger(base_addr + code.addr), code.size, true, true, true);
+        buffer.Protect(GetInteger(base_addr + code.addr), code.size,
-        buffer.Protect(GetInteger(base_addr + patch.addr), patch.size, true, true, true);
+                       Common::MemoryPermission::Read | Common::MemoryPermission::Execute);
+        buffer.Protect(GetInteger(base_addr + patch.addr), patch.size,
+                       Common::MemoryPermission::Read | Common::MemoryPermission::Execute);
         ReprotectSegment(code_set.PatchSegment(), Svc::MemoryPermission::None);
     }
 #endif

src/core/memory.cpp

@@ -10,6 +10,7 @@
 #include "common/assert.h"
 #include "common/atomic_ops.h"
 #include "common/common_types.h"
+#include "common/heap_tracker.h"
 #include "common/logging/log.h"
 #include "common/page_table.h"
 #include "common/scope_exit.h"
@@ -52,10 +53,18 @@ struct Memory::Impl {
         } else {
             current_page_table->fastmem_arena = nullptr;
         }
+
+#ifdef __linux__
+        heap_tracker.emplace(system.DeviceMemory().buffer);
+        buffer = std::addressof(*heap_tracker);
+#else
+        buffer = std::addressof(system.DeviceMemory().buffer);
+#endif
     }
 
     void MapMemoryRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size,
-                         Common::PhysicalAddress target, Common::MemoryPermission perms) {
+                         Common::PhysicalAddress target, Common::MemoryPermission perms,
+                         bool separate_heap) {
         ASSERT_MSG((size & YUZU_PAGEMASK) == 0, "non-page aligned size: {:016X}", size);
         ASSERT_MSG((base & YUZU_PAGEMASK) == 0, "non-page aligned base: {:016X}", GetInteger(base));
         ASSERT_MSG(target >= DramMemoryMap::Base, "Out of bounds target: {:016X}",
@@ -64,19 +73,20 @@ struct Memory::Impl {
                  Common::PageType::Memory);
 
         if (current_page_table->fastmem_arena) {
-            system.DeviceMemory().buffer.Map(GetInteger(base),
+            buffer->Map(GetInteger(base), GetInteger(target) - DramMemoryMap::Base, size, perms,
-                                             GetInteger(target) - DramMemoryMap::Base, size, perms);
+                        separate_heap);
         }
     }
 
-    void UnmapRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size) {
+    void UnmapRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size,
+                     bool separate_heap) {
         ASSERT_MSG((size & YUZU_PAGEMASK) == 0, "non-page aligned size: {:016X}", size);
         ASSERT_MSG((base & YUZU_PAGEMASK) == 0, "non-page aligned base: {:016X}", GetInteger(base));
         MapPages(page_table, base / YUZU_PAGESIZE, size / YUZU_PAGESIZE, 0,
                  Common::PageType::Unmapped);
 
         if (current_page_table->fastmem_arena) {
-            system.DeviceMemory().buffer.Unmap(GetInteger(base), size);
+            buffer->Unmap(GetInteger(base), size, separate_heap);
         }
     }
 
@@ -89,11 +99,6 @@ struct Memory::Impl {
             return;
         }
 
-        const bool is_r = True(perms & Common::MemoryPermission::Read);
-        const bool is_w = True(perms & Common::MemoryPermission::Write);
-        const bool is_x =
-            True(perms & Common::MemoryPermission::Execute) && Settings::IsNceEnabled();
-
         u64 protect_bytes{};
         u64 protect_begin{};
         for (u64 addr = vaddr; addr < vaddr + size; addr += YUZU_PAGESIZE) {
@@ -102,8 +107,7 @@ struct Memory::Impl {
             switch (page_type) {
             case Common::PageType::RasterizerCachedMemory:
                 if (protect_bytes > 0) {
-                    system.DeviceMemory().buffer.Protect(protect_begin, protect_bytes, is_r, is_w,
+                    buffer->Protect(protect_begin, protect_bytes, perms);
-                                                         is_x);
                     protect_bytes = 0;
                 }
                 break;
@@ -116,7 +120,7 @@ struct Memory::Impl {
         }
 
         if (protect_bytes > 0) {
-            system.DeviceMemory().buffer.Protect(protect_begin, protect_bytes, is_r, is_w, is_x);
+            buffer->Protect(protect_begin, protect_bytes, perms);
         }
     }
 
@@ -486,7 +490,9 @@ struct Memory::Impl {
         }
 
         if (current_page_table->fastmem_arena) {
-            system.DeviceMemory().buffer.Protect(vaddr, size, !debug, !debug);
+            const auto perm{debug ? Common::MemoryPermission{}
+                                  : Common::MemoryPermission::ReadWrite};
+            buffer->Protect(vaddr, size, perm);
         }
 
         // Iterate over a contiguous CPU address space, marking/unmarking the region.
@@ -543,9 +549,14 @@ struct Memory::Impl {
         }
 
         if (current_page_table->fastmem_arena) {
-            const bool is_read_enable =
+            Common::MemoryPermission perm{};
-                !Settings::values.use_reactive_flushing.GetValue() || !cached;
+            if (!Settings::values.use_reactive_flushing.GetValue() || !cached) {
-            system.DeviceMemory().buffer.Protect(vaddr, size, is_read_enable, !cached);
+                perm |= Common::MemoryPermission::Read;
+            }
+            if (!cached) {
+                perm |= Common::MemoryPermission::Write;
+            }
+            buffer->Protect(vaddr, size, perm);
         }
 
         // Iterate over a contiguous CPU address space, which corresponds to the specified GPU
@@ -856,6 +867,13 @@ struct Memory::Impl {
     std::array<GPUDirtyState, Core::Hardware::NUM_CPU_CORES> rasterizer_write_areas{};
     std::span<Core::GPUDirtyMemoryManager> gpu_dirty_managers;
     std::mutex sys_core_guard;
+
+    std::optional<Common::HeapTracker> heap_tracker;
+#ifdef __linux__
+    Common::HeapTracker* buffer{};
+#else
+    Common::HostMemory* buffer{};
+#endif
 };
 
 Memory::Memory(Core::System& system_) : system{system_} {
@@ -873,12 +891,14 @@ void Memory::SetCurrentPageTable(Kernel::KProcess& process) {
 }
 
 void Memory::MapMemoryRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size,
-                             Common::PhysicalAddress target, Common::MemoryPermission perms) {
+                             Common::PhysicalAddress target, Common::MemoryPermission perms,
-    impl->MapMemoryRegion(page_table, base, size, target, perms);
+                             bool separate_heap) {
+    impl->MapMemoryRegion(page_table, base, size, target, perms, separate_heap);
 }
 
-void Memory::UnmapRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size) {
+void Memory::UnmapRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size,
-    impl->UnmapRegion(page_table, base, size);
+                         bool separate_heap) {
+    impl->UnmapRegion(page_table, base, size, separate_heap);
 }
 
 void Memory::ProtectRegion(Common::PageTable& page_table, Common::ProcessAddress vaddr, u64 size,
@@ -1048,7 +1068,9 @@ void Memory::FlushRegion(Common::ProcessAddress dest_addr, size_t size) {
 }
 
 bool Memory::InvalidateNCE(Common::ProcessAddress vaddr, size_t size) {
-    bool mapped = true;
+    [[maybe_unused]] bool mapped = true;
+    [[maybe_unused]] bool rasterizer = false;
+
     u8* const ptr = impl->GetPointerImpl(
         GetInteger(vaddr),
         [&] {
@@ -1056,8 +1078,26 @@ bool Memory::InvalidateNCE(Common::ProcessAddress vaddr, size_t size) {
                       GetInteger(vaddr));
             mapped = false;
         },
-        [&] { impl->system.GPU().InvalidateRegion(GetInteger(vaddr), size); });
+        [&] {
+            impl->system.GPU().InvalidateRegion(GetInteger(vaddr), size);
+            rasterizer = true;
+        });
+
+#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

src/core/memory.h

@@ -86,7 +86,8 @@ public:
      * @param perms      The permissions to map the memory with.
      */
     void MapMemoryRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size,
-                         Common::PhysicalAddress target, Common::MemoryPermission perms);
+                         Common::PhysicalAddress target, Common::MemoryPermission perms,
+                         bool separate_heap);
 
     /**
      * Unmaps a region of the emulated process address space.
@@ -95,7 +96,8 @@ public:
      * @param base       The address to begin unmapping at.
      * @param size       The amount of bytes to unmap.
      */
-    void UnmapRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size);
+    void UnmapRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size,
+                     bool separate_heap);
 
     /**
      * Protects a region of the emulated process address space with the new permissions.
@@ -486,6 +488,7 @@ public:
     void SetGPUDirtyManagers(std::span<Core::GPUDirtyMemoryManager> managers);
     void InvalidateRegion(Common::ProcessAddress dest_addr, size_t size);
     bool InvalidateNCE(Common::ProcessAddress vaddr, size_t size);
+    bool InvalidateSeparateHeap(void* fault_address);
     void FlushRegion(Common::ProcessAddress dest_addr, size_t size);
 
 private:

src/tests/common/host_memory.cpp

@@ -12,6 +12,7 @@ using namespace Common::Literals;
 static constexpr size_t VIRTUAL_SIZE = 1ULL << 39;
 static constexpr size_t BACKING_SIZE = 4_GiB;
 static constexpr auto PERMS = Common::MemoryPermission::ReadWrite;
+static constexpr auto HEAP = false;
 
 TEST_CASE("HostMemory: Initialize and deinitialize", "[common]") {
     { HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE); }
@@ -20,7 +21,7 @@ TEST_CASE("HostMemory: Initialize and deinitialize", "[common]") {
 
 TEST_CASE("HostMemory: Simple map", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x5000, 0x8000, 0x1000, PERMS);
+    mem.Map(0x5000, 0x8000, 0x1000, PERMS, HEAP);
 
     volatile u8* const data = mem.VirtualBasePointer() + 0x5000;
     data[0] = 50;
@@ -29,8 +30,8 @@ TEST_CASE("HostMemory: Simple map", "[common]") {
 
 TEST_CASE("HostMemory: Simple mirror map", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x5000, 0x3000, 0x2000, PERMS);
+    mem.Map(0x5000, 0x3000, 0x2000, PERMS, HEAP);
-    mem.Map(0x8000, 0x4000, 0x1000, PERMS);
+    mem.Map(0x8000, 0x4000, 0x1000, PERMS, HEAP);
 
     volatile u8* const mirror_a = mem.VirtualBasePointer() + 0x5000;
     volatile u8* const mirror_b = mem.VirtualBasePointer() + 0x8000;
@@ -40,116 +41,116 @@ TEST_CASE("HostMemory: Simple mirror map", "[common]") {
 
 TEST_CASE("HostMemory: Simple unmap", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x5000, 0x3000, 0x2000, PERMS);
+    mem.Map(0x5000, 0x3000, 0x2000, PERMS, HEAP);
 
     volatile u8* const data = mem.VirtualBasePointer() + 0x5000;
     data[75] = 50;
     REQUIRE(data[75] == 50);
 
-    mem.Unmap(0x5000, 0x2000);
+    mem.Unmap(0x5000, 0x2000, HEAP);
 }
 
 TEST_CASE("HostMemory: Simple unmap and remap", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x5000, 0x3000, 0x2000, PERMS);
+    mem.Map(0x5000, 0x3000, 0x2000, PERMS, HEAP);
 
     volatile u8* const data = mem.VirtualBasePointer() + 0x5000;
     data[0] = 50;
     REQUIRE(data[0] == 50);
 
-    mem.Unmap(0x5000, 0x2000);
+    mem.Unmap(0x5000, 0x2000, HEAP);
 
-    mem.Map(0x5000, 0x3000, 0x2000, PERMS);
+    mem.Map(0x5000, 0x3000, 0x2000, PERMS, HEAP);
     REQUIRE(data[0] == 50);
 
-    mem.Map(0x7000, 0x2000, 0x5000, PERMS);
+    mem.Map(0x7000, 0x2000, 0x5000, PERMS, HEAP);
     REQUIRE(data[0x3000] == 50);
 }
 
 TEST_CASE("HostMemory: Nieche allocation", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x0000, 0, 0x20000, PERMS);
+    mem.Map(0x0000, 0, 0x20000, PERMS, HEAP);
-    mem.Unmap(0x0000, 0x4000);
+    mem.Unmap(0x0000, 0x4000, HEAP);
-    mem.Map(0x1000, 0, 0x2000, PERMS);
+    mem.Map(0x1000, 0, 0x2000, PERMS, HEAP);
-    mem.Map(0x3000, 0, 0x1000, PERMS);
+    mem.Map(0x3000, 0, 0x1000, PERMS, HEAP);
-    mem.Map(0, 0, 0x1000, PERMS);
+    mem.Map(0, 0, 0x1000, PERMS, HEAP);
 }
 
 TEST_CASE("HostMemory: Full unmap", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x8000, 0, 0x4000, PERMS);
+    mem.Map(0x8000, 0, 0x4000, PERMS, HEAP);
-    mem.Unmap(0x8000, 0x4000);
+    mem.Unmap(0x8000, 0x4000, HEAP);
-    mem.Map(0x6000, 0, 0x16000, PERMS);
+    mem.Map(0x6000, 0, 0x16000, PERMS, HEAP);
 }
 
 TEST_CASE("HostMemory: Right out of bounds unmap", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x0000, 0, 0x4000, PERMS);
+    mem.Map(0x0000, 0, 0x4000, PERMS, HEAP);
-    mem.Unmap(0x2000, 0x4000);
+    mem.Unmap(0x2000, 0x4000, HEAP);
-    mem.Map(0x2000, 0x80000, 0x4000, PERMS);
+    mem.Map(0x2000, 0x80000, 0x4000, PERMS, HEAP);
 }
 
 TEST_CASE("HostMemory: Left out of bounds unmap", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x8000, 0, 0x4000, PERMS);
+    mem.Map(0x8000, 0, 0x4000, PERMS, HEAP);
-    mem.Unmap(0x6000, 0x4000);
+    mem.Unmap(0x6000, 0x4000, HEAP);
-    mem.Map(0x8000, 0, 0x2000, PERMS);
+    mem.Map(0x8000, 0, 0x2000, PERMS, HEAP);
 }
 
 TEST_CASE("HostMemory: Multiple placeholder unmap", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x0000, 0, 0x4000, PERMS);
+    mem.Map(0x0000, 0, 0x4000, PERMS, HEAP);
-    mem.Map(0x4000, 0, 0x1b000, PERMS);
+    mem.Map(0x4000, 0, 0x1b000, PERMS, HEAP);
-    mem.Unmap(0x3000, 0x1c000);
+    mem.Unmap(0x3000, 0x1c000, HEAP);
-    mem.Map(0x3000, 0, 0x20000, PERMS);
+    mem.Map(0x3000, 0, 0x20000, PERMS, HEAP);
 }
 
 TEST_CASE("HostMemory: Unmap between placeholders", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x0000, 0, 0x4000, PERMS);
+    mem.Map(0x0000, 0, 0x4000, PERMS, HEAP);
-    mem.Map(0x4000, 0, 0x4000, PERMS);
+    mem.Map(0x4000, 0, 0x4000, PERMS, HEAP);
-    mem.Unmap(0x2000, 0x4000);
+    mem.Unmap(0x2000, 0x4000, HEAP);
-    mem.Map(0x2000, 0, 0x4000, PERMS);
+    mem.Map(0x2000, 0, 0x4000, PERMS, HEAP);
 }
 
 TEST_CASE("HostMemory: Unmap to origin", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x4000, 0, 0x4000, PERMS);
+    mem.Map(0x4000, 0, 0x4000, PERMS, HEAP);
-    mem.Map(0x8000, 0, 0x4000, PERMS);
+    mem.Map(0x8000, 0, 0x4000, PERMS, HEAP);
-    mem.Unmap(0x4000, 0x4000);
+    mem.Unmap(0x4000, 0x4000, HEAP);
-    mem.Map(0, 0, 0x4000, PERMS);
+    mem.Map(0, 0, 0x4000, PERMS, HEAP);
-    mem.Map(0x4000, 0, 0x4000, PERMS);
+    mem.Map(0x4000, 0, 0x4000, PERMS, HEAP);
 }
 
 TEST_CASE("HostMemory: Unmap to right", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x4000, 0, 0x4000, PERMS);
+    mem.Map(0x4000, 0, 0x4000, PERMS, HEAP);
-    mem.Map(0x8000, 0, 0x4000, PERMS);
+    mem.Map(0x8000, 0, 0x4000, PERMS, HEAP);
-    mem.Unmap(0x8000, 0x4000);
+    mem.Unmap(0x8000, 0x4000, HEAP);
-    mem.Map(0x8000, 0, 0x4000, PERMS);
+    mem.Map(0x8000, 0, 0x4000, PERMS, HEAP);
 }
 
 TEST_CASE("HostMemory: Partial right unmap check bindings", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x4000, 0x10000, 0x4000, PERMS);
+    mem.Map(0x4000, 0x10000, 0x4000, PERMS, HEAP);
 
     volatile u8* const ptr = mem.VirtualBasePointer() + 0x4000;
     ptr[0x1000] = 17;
 
-    mem.Unmap(0x6000, 0x2000);
+    mem.Unmap(0x6000, 0x2000, HEAP);
 
     REQUIRE(ptr[0x1000] == 17);
 }
 
 TEST_CASE("HostMemory: Partial left unmap check bindings", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x4000, 0x10000, 0x4000, PERMS);
+    mem.Map(0x4000, 0x10000, 0x4000, PERMS, HEAP);
 
     volatile u8* const ptr = mem.VirtualBasePointer() + 0x4000;
     ptr[0x3000] = 19;
     ptr[0x3fff] = 12;
 
-    mem.Unmap(0x4000, 0x2000);
+    mem.Unmap(0x4000, 0x2000, HEAP);
 
     REQUIRE(ptr[0x3000] == 19);
     REQUIRE(ptr[0x3fff] == 12);
@@ -157,13 +158,13 @@ TEST_CASE("HostMemory: Partial left unmap check bindings", "[common]") {
 
 TEST_CASE("HostMemory: Partial middle unmap check bindings", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x4000, 0x10000, 0x4000, PERMS);
+    mem.Map(0x4000, 0x10000, 0x4000, PERMS, HEAP);
 
     volatile u8* const ptr = mem.VirtualBasePointer() + 0x4000;
     ptr[0x0000] = 19;
     ptr[0x3fff] = 12;
 
-    mem.Unmap(0x1000, 0x2000);
+    mem.Unmap(0x1000, 0x2000, HEAP);
 
     REQUIRE(ptr[0x0000] == 19);
     REQUIRE(ptr[0x3fff] == 12);
@@ -171,14 +172,14 @@ TEST_CASE("HostMemory: Partial middle unmap check bindings", "[common]") {
 
 TEST_CASE("HostMemory: Partial sparse middle unmap and check bindings", "[common]") {
     HostMemory mem(BACKING_SIZE, VIRTUAL_SIZE);
-    mem.Map(0x4000, 0x10000, 0x2000, PERMS);
+    mem.Map(0x4000, 0x10000, 0x2000, PERMS, HEAP);
-    mem.Map(0x6000, 0x20000, 0x2000, PERMS);
+    mem.Map(0x6000, 0x20000, 0x2000, PERMS, HEAP);
 
     volatile u8* const ptr = mem.VirtualBasePointer() + 0x4000;
     ptr[0x0000] = 19;
     ptr[0x3fff] = 12;
 
-    mem.Unmap(0x5000, 0x2000);
+    mem.Unmap(0x5000, 0x2000, HEAP);
 
     REQUIRE(ptr[0x0000] == 19);
     REQUIRE(ptr[0x3fff] == 12);