LICENSE

Signed-off-by: lizzie <lizzie@eden-emu.dev>

src/CMakeLists.txt

@@ -159,7 +159,10 @@ else()
     endif()
 
     if (ARCHITECTURE_x86_64)
-        add_compile_options(-mcx16)
+        add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-mcx16>)
+        if (PLATFORM_LINUX OR PLATFORM_FREEBSD)
+            add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-mtls-dialect=gnu2>)
+        endif()
     endif()
 
     if (APPLE AND CXX_CLANG)

src/common/CMakeLists.txt

@@ -66,8 +66,6 @@ add_library(
     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

@@ -1,282 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2026 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
-
-#include <fstream>
-#include "common/heap_tracker.h"
-#include "common/logging.h"
-#include "common/assert.h"
-
-namespace Common {
-
-namespace {
-
-s64 GetMaxPermissibleResidentMapCount() {
-    // Default value.
-    s64 value = 65530;
-
-    // Try to read how many mappings we can make.
-    std::ifstream s("/proc/sys/vm/max_map_count");
-    s >> value;
-
-    // Print, for debug.
-    LOG_INFO(HW_Memory, "Current maximum map count: {}", value);
-
-    // Allow 20000 maps for other code and to account for split inaccuracy.
-    return std::max<s64>(value - 20000, 0);
-}
-
-} // namespace
-
-HeapTracker::HeapTracker(Common::HostMemory& buffer)
-    : m_buffer(buffer), m_max_resident_map_count(GetMaxPermissibleResidentMapCount()) {}
-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.
-            ASSERT(--m_map_count >= 0);
-            it = m_mappings.erase(it);
-
-            // 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.
-    const VAddr end = virtual_offset + size;
-    VAddr cur = virtual_offset;
-
-    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 > m_max_resident_map_count) {
-            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());
-
-    // Dump half of the mappings.
-    //
-    // Despite being worse in theory, this has proven to be better in practice than more
-    // regularly dumping a smaller amount, because it significantly reduces average case
-    // lock contention.
-    std::size_t const desired_count = (std::min)(m_resident_map_count, m_max_resident_map_count) / 2;
-    std::size_t const 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_map_count++;
-        m_resident_mappings.insert(*right);
-    }
-}
-
-HeapTracker::AddrTree::iterator HeapTracker::GetNearestHeapMapLocked(VAddr offset) {
-    const SeparateHeapMap key{
-        .vaddr = offset,
-    };
-
-    return m_mappings.find(key);
-}
-
-} // namespace Common

src/common/heap_tracker.h

@@ -1,98 +0,0 @@
-// 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;
-    const s64 m_max_resident_map_count;
-
-    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

@@ -572,9 +572,8 @@ public:
         if (True(perms & MemoryPermission::Execute))
             prot_flags |= PROT_EXEC;
 #endif
-        int flags = (fd >= 0 ? MAP_SHARED : MAP_PRIVATE) | MAP_FIXED;
-        void* ret = mmap(virtual_base + virtual_offset, length, prot_flags, flags, fd, host_offset);
-        ASSERT_MSG(ret != MAP_FAILED, "mmap: {} {}", strerror(errno), fd);
+        int ret = mprotect(virtual_base + virtual_offset, length, prot_flags);
+        ASSERT_MSG(ret == 0, "mprotect: {} {}", strerror(errno), fd);
     }
 
     void Unmap(size_t virtual_offset, size_t length) {
@@ -588,8 +587,8 @@ public:
         auto [merged_pointer, merged_size] =
             free_manager.FreeBlock(virtual_base + virtual_offset, length);
 
-        void* ret = mmap(merged_pointer, merged_size, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
-        ASSERT_MSG(ret != MAP_FAILED, "mmap: {}", strerror(errno));
+        int ret = mprotect(merged_pointer, merged_size, PROT_NONE);
+        ASSERT_MSG(ret == 0, "mmap: {}", strerror(errno));
     }
 
     void Protect(size_t virtual_offset, size_t length, bool read, bool write, bool execute) {

src/core/memory.cpp

@@ -16,7 +16,6 @@
 #include "common/assert.h"
 #include "common/atomic_ops.h"
 #include "common/common_types.h"
-#include "common/heap_tracker.h"
 #include "common/logging.h"
 #include "common/page_table.h"
 #include "common/scope_exit.h"
@@ -55,37 +54,24 @@ struct Memory::Impl {
         } else {
             current_page_table->fastmem_arena = nullptr;
         }
-
-#ifdef __ANDROID__
-        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,
-                         bool separate_heap) {
+    void MapMemoryRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size, 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}",
-                   GetInteger(target));
-        MapPages(page_table, base / YUZU_PAGESIZE, size / YUZU_PAGESIZE, target,
-                 Common::PageType::Memory);
+        ASSERT_MSG(target >= DramMemoryMap::Base, "Out of bounds target: {:016X}", GetInteger(target));
+        MapPages(page_table, base / YUZU_PAGESIZE, size / YUZU_PAGESIZE, target, Common::PageType::Memory);
 
         if (current_page_table->fastmem_arena) {
-            buffer->Map(GetInteger(base), GetInteger(target) - DramMemoryMap::Base, size, perms,
-                        separate_heap);
+            buffer->Map(GetInteger(base), GetInteger(target) - DramMemoryMap::Base, size, perms, separate_heap);
         }
     }
 
-    void UnmapRegion(Common::PageTable& page_table, Common::ProcessAddress base, u64 size,
-                     bool separate_heap) {
+    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);
+        MapPages(page_table, base / YUZU_PAGESIZE, size / YUZU_PAGESIZE, 0, Common::PageType::Unmapped);
 
         if (current_page_table->fastmem_arena) {
             buffer->Unmap(GetInteger(base), size, separate_heap);
@@ -857,12 +843,7 @@ struct Memory::Impl {
     std::array<Common::ScratchBuffer<u32>, Core::Hardware::NUM_CPU_CORES> scratch_buffers{};
     std::span<Core::GPUDirtyMemoryManager> gpu_dirty_managers;
     std::mutex sys_core_guard;
-#ifdef __ANDROID__
-    std::optional<Common::HeapTracker> heap_tracker;
-    Common::HeapTracker* buffer{};
-#else
     Common::HostMemory* buffer{};
-#endif
 };
 
 Memory::Memory(Core::System& system_) : system{system_} {
@@ -1055,30 +1036,14 @@ bool Memory::InvalidateNCE(Common::ProcessAddress vaddr, size_t size) {
     u8* const ptr = impl->GetPointerImpl(
         GetInteger(vaddr),
         [&] {
-            LOG_ERROR(HW_Memory, "Unmapped InvalidateNCE for {} bytes @ {:#x}", size,
-                      GetInteger(vaddr));
+            LOG_ERROR(HW_Memory, "Unmapped InvalidateNCE for {} bytes @ {:#x}", size, GetInteger(vaddr));
             mapped = false;
         },
         [&] { rasterizer = true; });
     if (rasterizer) {
         impl->InvalidateGPUMemory(ptr, size);
     }
-
-#ifdef __ANDROID__
-    if (!rasterizer && mapped) {
-        impl->buffer->DeferredMapSeparateHeap(GetInteger(vaddr));
-    }
-#endif
-
     return mapped && ptr != nullptr;
 }
 
-bool Memory::InvalidateSeparateHeap(void* fault_address) {
-#ifdef __ANDROID__
-    return impl->buffer->DeferredMapSeparateHeap(static_cast<u8*>(fault_address));
-#else
-    return false;
-#endif
-}
-
 } // namespace Core::Memory

src/core/memory.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: 2014 Citra Emulator Project
@@ -490,13 +490,8 @@ public:
      *              marked as debug or non-debug.
      */
     void MarkRegionDebug(Common::ProcessAddress vaddr, u64 size, bool debug);
-
     void SetGPUDirtyManagers(std::span<Core::GPUDirtyMemoryManager> managers);
-
     bool InvalidateNCE(Common::ProcessAddress vaddr, size_t size);
-
-    bool InvalidateSeparateHeap(void* fault_address);
-
 private:
     Core::System& system;
 

src/dynarmic/src/dynarmic/backend/exception_handler_macos.cpp

@@ -82,8 +82,6 @@ private:
 
     std::thread thread;
     mach_port_t server_port;
-
-    void MessagePump();
 };
 
 MachHandler::MachHandler() {
@@ -97,7 +95,30 @@ MachHandler::MachHandler() {
     KCHECK(mach_port_request_notification(mach_task_self(), server_port, MACH_NOTIFY_PORT_DESTROYED, 0, server_port, MACH_MSG_TYPE_MAKE_SEND_ONCE, &prev));
 #undef KCHECK
 
-    thread = std::thread(&MachHandler::MessagePump, this);
+    thread = std::thread([this] {
+        mach_msg_return_t mr;
+        MachMessage request;
+        MachMessage reply;
+
+        while (true) {
+            mr = mach_msg(&request.head, MACH_RCV_MSG | MACH_RCV_LARGE, 0, sizeof(request), server_port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+            if (mr != MACH_MSG_SUCCESS) {
+                fmt::print(stderr, "dynarmic: macOS MachHandler: Failed to receive mach message. error: {:#08x} ({})\n", mr, mach_error_string(mr));
+                return;
+            }
+
+            if (!mach_exc_server(&request.head, &reply.head)) {
+                fmt::print(stderr, "dynarmic: macOS MachHandler: Unexpected mach message\n");
+                return;
+            }
+
+            mr = mach_msg(&reply.head, MACH_SEND_MSG, reply.head.msgh_size, 0, MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
+            if (mr != MACH_MSG_SUCCESS) {
+                fmt::print(stderr, "dynarmic: macOS MachHandler: Failed to send mach message. error: {:#08x} ({})\n", mr, mach_error_string(mr));
+                return;
+            }
+        }
+    });
     thread.detach();
 }
 
@@ -105,31 +126,6 @@ MachHandler::~MachHandler() {
     mach_port_deallocate(mach_task_self(), server_port);
 }
 
-void MachHandler::MessagePump() {
-    mach_msg_return_t mr;
-    MachMessage request;
-    MachMessage reply;
-
-    while (true) {
-        mr = mach_msg(&request.head, MACH_RCV_MSG | MACH_RCV_LARGE, 0, sizeof(request), server_port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
-        if (mr != MACH_MSG_SUCCESS) {
-            fmt::print(stderr, "dynarmic: macOS MachHandler: Failed to receive mach message. error: {:#08x} ({})\n", mr, mach_error_string(mr));
-            return;
-        }
-
-        if (!mach_exc_server(&request.head, &reply.head)) {
-            fmt::print(stderr, "dynarmic: macOS MachHandler: Unexpected mach message\n");
-            return;
-        }
-
-        mr = mach_msg(&reply.head, MACH_SEND_MSG, reply.head.msgh_size, 0, MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
-        if (mr != MACH_MSG_SUCCESS) {
-            fmt::print(stderr, "dynarmic: macOS MachHandler: Failed to send mach message. error: {:#08x} ({})\n", mr, mach_error_string(mr));
-            return;
-        }
-    }
-}
-
 #if defined(ARCHITECTURE_x86_64)
 kern_return_t MachHandler::HandleRequest(x86_thread_state64_t* ts) {
     std::lock_guard<std::mutex> guard(code_block_infos_mutex);

src/dynarmic/src/dynarmic/backend/exception_handler_posix.cpp

@@ -47,22 +47,18 @@ class SigHandler {
         });
     }
     static void SigAction(int sig, siginfo_t* info, void* raw_context);
-
-    bool supports_fast_mem = true;
-    void* signal_stack_memory = nullptr;
+    std::vector<u8> signal_stack_memory;
     ankerl::unordered_dense::map<u64, CodeBlockInfo> code_block_infos;
     std::shared_mutex code_block_infos_mutex;
     struct sigaction old_sa_segv;
     struct sigaction old_sa_bus;
-    std::size_t signal_stack_size;
+    bool supports_fast_mem = true;
 public:
     SigHandler() noexcept {
-        signal_stack_size = std::max<size_t>(SIGSTKSZ, 2 * 1024 * 1024);
-        signal_stack_memory = mmap(nullptr, signal_stack_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-
+        signal_stack_memory.resize(std::max<std::size_t>(SIGSTKSZ, 2 * 1024 * 1024), 0);
         stack_t signal_stack{};
-        signal_stack.ss_sp = signal_stack_memory;
-        signal_stack.ss_size = signal_stack_size;
+        signal_stack.ss_sp = signal_stack_memory.data();
+        signal_stack.ss_size = signal_stack_memory.size();
         signal_stack.ss_flags = 0;
         if (sigaltstack(&signal_stack, nullptr) != 0) {
             fmt::print(stderr, "dynarmic: POSIX SigHandler: init failure at sigaltstack\n");
@@ -89,10 +85,6 @@ public:
 #endif
     }
 
-    ~SigHandler() noexcept {
-        munmap(signal_stack_memory, signal_stack_size);
-    }
-
     void AddCodeBlock(u64 offset, CodeBlockInfo cbi) noexcept {
         std::unique_lock guard(code_block_infos_mutex);
         code_block_infos.insert_or_assign(offset, cbi);