diff --git a/CMakeLists.txt b/CMakeLists.txt index 44cbd873..27dc08ce 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -23,6 +23,7 @@ include_directories(third_party/imgui/) include_directories(third_party/dynarmic/src) include_directories(third_party/cryptopp/) include_directories(third_party/result/include/) +include_directories(third_party/Duckstation/include) add_compile_definitions(NOMINMAX) add_compile_definitions(SDL_MAIN_HANDLED) @@ -123,6 +124,8 @@ set(THIRD_PARTY_SOURCE_FILES third_party/imgui/imgui.cpp third_party/imgui/imgui_widgets.cpp third_party/imgui/imgui_demo.cpp third_party/gl3w/gl3w.cpp + + third_party/Duckstation/memory_arena.cpp ) source_group("Header Files\\Core" FILES ${HEADER_FILES}) diff --git a/third_party/Duckstation/LICENSE b/third_party/Duckstation/LICENSE new file mode 100644 index 00000000..20d40b6b --- /dev/null +++ b/third_party/Duckstation/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. \ No newline at end of file diff --git a/third_party/Duckstation/include/MemArena/memory_arena.hpp b/third_party/Duckstation/include/MemArena/memory_arena.hpp new file mode 100644 index 00000000..92ded7e6 --- /dev/null +++ b/third_party/Duckstation/include/MemArena/memory_arena.hpp @@ -0,0 +1,86 @@ +#pragma once +#include "helpers.hpp" +#include +#include +#include + +// Force inline helper +#ifndef ALWAYS_INLINE +#if defined(_MSC_VER) +#define ALWAYS_INLINE __forceinline +#elif defined(__GNUC__) || defined(__clang__) +#define ALWAYS_INLINE __attribute__((always_inline)) inline +#else +#define ALWAYS_INLINE inline +#endif +#endif + +namespace Common { +class MemoryArena +{ +public: + class View + { + public: + enum : size_t + { + RESERVED_REGION_OFFSET = static_cast(-1) + }; + + View(MemoryArena* parent, void* base_pointer, size_t arena_offset, size_t mapping_size, bool writable); + View(View&& view); + ~View(); + + void* GetBasePointer() const { return m_base_pointer; } + size_t GetArenaOffset() const { return m_arena_offset; } + size_t GetMappingSize() const { return m_mapping_size; } + bool IsWritable() const { return m_writable; } + + private: + MemoryArena* m_parent; + void* m_base_pointer; + size_t m_arena_offset; + size_t m_mapping_size; + bool m_writable; + }; + + MemoryArena(); + ~MemoryArena(); + + static void* FindBaseAddressForMapping(size_t size); + + ALWAYS_INLINE size_t GetSize() const { return m_size; } + ALWAYS_INLINE bool IsWritable() const { return m_writable; } + ALWAYS_INLINE bool IsExecutable() const { return m_executable; } + + bool IsValid() const; + bool Create(size_t size, bool writable, bool executable); + void Destroy(); + + std::optional CreateView(size_t offset, size_t size, bool writable, bool executable, + void* fixed_address = nullptr); + + std::optional CreateReservedView(size_t size, void* fixed_address = nullptr); + + void* CreateViewPtr(size_t offset, size_t size, bool writable, bool executable, void* fixed_address = nullptr); + bool FlushViewPtr(void* address, size_t size); + bool ReleaseViewPtr(void* address, size_t size); + + void* CreateReservedPtr(size_t size, void* fixed_address = nullptr); + bool ReleaseReservedPtr(void* address, size_t size); + + static bool SetPageProtection(void* address, size_t length, bool readable, bool writable, bool executable); + +private: +#if defined(_WIN32) + void* m_file_handle = nullptr; +#elif defined(__linux__) || defined(ANDROID) || defined(__APPLE__) || defined(__FreeBSD__) + int m_shmem_fd = -1; +#endif + + std::atomic_size_t m_num_views{0}; + size_t m_size = 0; + bool m_writable = false; + bool m_executable = false; +}; +} // namespace Common diff --git a/third_party/Duckstation/memory_arena.cpp b/third_party/Duckstation/memory_arena.cpp new file mode 100644 index 00000000..5422254e --- /dev/null +++ b/third_party/Duckstation/memory_arena.cpp @@ -0,0 +1,434 @@ +#include "MemArena/memory_arena.hpp" + +#include +#include +#if defined(_WIN32) +#ifndef WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN 1 +#endif +#ifndef NOMINMAX +#define NOMINMAX 1 +#endif + +// require vista+ +#ifdef _WIN32_WINNT +#undef _WIN32_WINNT +#endif +#define _WIN32_WINNT _WIN32_WINNT_VISTA + +#include +#elif defined(ANDROID) +#include +#include +#include +#include +#include +#include +#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) +#include +#include +#include +#include +#endif + +namespace Common { + +// Borrowed from Dolphin +#ifdef ANDROID +#define ASHMEM_DEVICE "/dev/ashmem" + +static int AshmemCreateFileMapping(const char* name, size_t size) +{ + // ASharedMemory path - works on API >= 26 and falls through on API < 26: + + // We can't call ASharedMemory_create the normal way without increasing the + // minimum version requirement to API 26, so we use dlopen/dlsym instead + static void* libandroid = dlopen("libandroid.so", RTLD_LAZY | RTLD_LOCAL); + static auto shared_memory_create = + reinterpret_cast(dlsym(libandroid, "ASharedMemory_create")); + if (shared_memory_create) + return shared_memory_create(name, size); + + // /dev/ashmem path - works on API < 29: + + int fd, ret; + fd = open(ASHMEM_DEVICE, O_RDWR); + if (fd < 0) + return fd; + + // We don't really care if we can't set the name, it is optional + ioctl(fd, ASHMEM_SET_NAME, name); + + ret = ioctl(fd, ASHMEM_SET_SIZE, size); + if (ret < 0) + { + close(fd); + Log_ErrorPrintf("Ashmem returned error: 0x%08x", ret); + return ret; + } + return fd; +} +#endif + +MemoryArena::MemoryArena() = default; + +MemoryArena::~MemoryArena() +{ + Destroy(); +} + +void* MemoryArena::FindBaseAddressForMapping(size_t size) +{ + void* base_address; +#if defined(_WIN32) + base_address = VirtualAlloc(nullptr, size, MEM_RESERVE, PAGE_READWRITE); + if (base_address) + VirtualFree(base_address, 0, MEM_RELEASE); +#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) + base_address = mmap(nullptr, size, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0); + if (base_address) + munmap(base_address, size); +#elif defined(__ANDROID__) + base_address = mmap(nullptr, size, PROT_NONE, MAP_ANON | MAP_SHARED, -1, 0); + if (base_address) + munmap(base_address, size); +#else + base_address = nullptr; +#endif + + if (!base_address) + { + printf("Failed to get base address for memory mapping of size %zu", size); + return nullptr; + } + + return base_address; +} + +bool MemoryArena::IsValid() const +{ +#if defined(_WIN32) + return m_file_handle != nullptr; +#else + return m_shmem_fd >= 0; +#endif +} + +static std::string GetFileMappingName() +{ +#if defined(_WIN32) + const unsigned pid = GetCurrentProcessId(); +#elif defined(__ANDROID__) || defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) + const unsigned pid = static_cast(getpid()); +#else +#error Unknown platform. +#endif + + std::string ret = std::string("Alber_") + std::to_string(pid); + printf("File mapping name: %s\n", ret.c_str()); + return ret; +} + +bool MemoryArena::Create(size_t size, bool writable, bool executable) +{ + if (IsValid()) + Destroy(); + + const std::string file_mapping_name(GetFileMappingName()); + +#if defined(_WIN32) + const DWORD protect = (writable ? (executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE) : PAGE_READONLY); +#ifndef _UWP + m_file_handle = CreateFileMappingA(INVALID_HANDLE_VALUE, nullptr, protect, uint32_t(size >> 32), uint32_t(size), + file_mapping_name.c_str()); +#else + m_file_handle = CreateFileMappingFromApp(INVALID_HANDLE_VALUE, nullptr, protect, size, + StringUtil::UTF8StringToWideString(file_mapping_name).c_str()); +#endif + if (!m_file_handle) + { + printf("CreateFileMapping failed: %u", GetLastError()); + return false; + } + + m_size = size; + m_writable = writable; + m_executable = executable; + return true; +#elif defined(__ANDROID__) + m_shmem_fd = AshmemCreateFileMapping(file_mapping_name.c_str(), size); + if (m_shmem_fd < 0) + { + printf("AshmemCreateFileMapping failed: %d %d", m_shmem_fd, errno); + return false; + } + + m_size = size; + m_writable = writable; + m_executable = executable; + return true; +#elif defined(__linux__) + m_shmem_fd = shm_open(file_mapping_name.c_str(), O_CREAT | O_EXCL | (writable ? O_RDWR : O_RDONLY), 0600); + if (m_shmem_fd < 0) + { + printf("shm_open failed: %d", errno); + return false; + } + + // we're not going to be opening this mapping in other processes, so remove the file + shm_unlink(file_mapping_name.c_str()); + + // ensure it's the correct size + if (ftruncate64(m_shmem_fd, static_cast(size)) < 0) + { + printf("ftruncate64(%zu) failed: %d", size, errno); + return false; + } + + m_size = size; + m_writable = writable; + m_executable = executable; + return true; +#elif defined(__APPLE__) || defined(__FreeBSD__) +#if defined(__APPLE__) + m_shmem_fd = shm_open(file_mapping_name.c_str(), O_CREAT | O_EXCL | (writable ? O_RDWR : O_RDONLY), 0600); +#else + m_shmem_fd = shm_open(SHM_ANON, O_CREAT | O_EXCL | (writable ? O_RDWR : O_RDONLY), 0600); +#endif + + if (m_shmem_fd < 0) + { + printf("shm_open failed: %d", errno); + return false; + } + +#ifdef __APPLE__ + // we're not going to be opening this mapping in other processes, so remove the file + shm_unlink(file_mapping_name.c_str()); +#endif + + // ensure it's the correct size + if (ftruncate(m_shmem_fd, static_cast(size)) < 0) + { + printf("ftruncate(%zu) failed: %d", size, errno); + return false; + } + + m_size = size; + m_writable = writable; + m_executable = executable; + return true; +#else + return false; +#endif +} + +void MemoryArena::Destroy() +{ +#if defined(_WIN32) + if (m_file_handle) + { + CloseHandle(m_file_handle); + m_file_handle = nullptr; + } +#elif defined(__linux__) || defined(__FreeBSD__) + if (m_shmem_fd > 0) + { + close(m_shmem_fd); + m_shmem_fd = -1; + } +#endif +} + +std::optional MemoryArena::CreateView(size_t offset, size_t size, bool writable, bool executable, + void* fixed_address) +{ + void* base_pointer = CreateViewPtr(offset, size, writable, executable, fixed_address); + if (!base_pointer) + return std::nullopt; + + return View(this, base_pointer, offset, size, writable); +} + +std::optional MemoryArena::CreateReservedView(size_t size, void* fixed_address /*= nullptr*/) +{ + void* base_pointer = CreateReservedPtr(size, fixed_address); + if (!base_pointer) + return std::nullopt; + + return View(this, base_pointer, View::RESERVED_REGION_OFFSET, size, false); +} + +void* MemoryArena::CreateViewPtr(size_t offset, size_t size, bool writable, bool executable, + void* fixed_address /*= nullptr*/) +{ + void* base_pointer; +#if defined(_WIN32) + const DWORD desired_access = FILE_MAP_READ | (writable ? FILE_MAP_WRITE : 0) | (executable ? FILE_MAP_EXECUTE : 0); +#ifndef _UWP + base_pointer = + MapViewOfFileEx(m_file_handle, desired_access, uint32_t(offset >> 32), uint32_t(offset), size, fixed_address); +#else + // UWP does not support fixed mappings. + if (!fixed_address) + base_pointer = MapViewOfFileFromApp(m_file_handle, desired_access, offset, size); + else + base_pointer = nullptr; +#endif + if (!base_pointer) + return nullptr; +#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) + const int flags = (fixed_address != nullptr) ? (MAP_SHARED | MAP_FIXED) : MAP_SHARED; + const int prot = PROT_READ | (writable ? PROT_WRITE : 0) | (executable ? PROT_EXEC : 0); + base_pointer = mmap(fixed_address, size, prot, flags, m_shmem_fd, static_cast(offset)); + if (base_pointer == reinterpret_cast(-1)) + return nullptr; +#else + return nullptr; +#endif + + m_num_views.fetch_add(1); + return base_pointer; +} + +bool MemoryArena::FlushViewPtr(void* address, size_t size) +{ +#if defined(_WIN32) + return FlushViewOfFile(address, size); +#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) + return (msync(address, size, 0) >= 0); +#else + return false; +#endif +} + +bool MemoryArena::ReleaseViewPtr(void* address, size_t size) +{ + bool result; +#if defined(_WIN32) + result = static_cast(UnmapViewOfFile(address)); +#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) + result = (munmap(address, size) >= 0); +#else + result = false; +#endif + + if (!result) + { + printf("Failed to unmap previously-created view at %p", address); + return false; + } + + const size_t prev_count = m_num_views.fetch_sub(1); + + if (!(prev_count > 0)) { + printf("Error unmapping previously-created view"); + std::abort(); + } + return true; +} + +void* MemoryArena::CreateReservedPtr(size_t size, void* fixed_address /*= nullptr*/) +{ + void* base_pointer; +#if defined(_WIN32) + base_pointer = VirtualAlloc(fixed_address, size, MEM_RESERVE, PAGE_NOACCESS); +#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) + const int flags = + (fixed_address != nullptr) ? (MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED) : (MAP_PRIVATE | MAP_ANONYMOUS); + base_pointer = mmap(fixed_address, size, PROT_NONE, flags, -1, 0); + if (base_pointer == reinterpret_cast(-1)) + return nullptr; +#else + return nullptr; +#endif + + m_num_views.fetch_add(1); + return base_pointer; +} + +bool MemoryArena::ReleaseReservedPtr(void* address, size_t size) +{ + bool result; +#if defined(_WIN32) + result = static_cast(VirtualFree(address, 0, MEM_RELEASE)); +#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) + result = (munmap(address, size) >= 0); +#else + result = false; +#endif + + if (!result) + { + printf("Failed to release previously-created view at %p", address); + return false; + } + + const size_t prev_count = m_num_views.fetch_sub(1); + if (!(prev_count > 0)) { + printf("Error releasing previously-created memory view"); + std::abort(); + } + return true; +} + +bool MemoryArena::SetPageProtection(void* address, size_t length, bool readable, bool writable, bool executable) +{ +#if defined(_WIN32) + static constexpr DWORD protection_table[2][2][2] = { + {{PAGE_NOACCESS, PAGE_EXECUTE}, {PAGE_WRITECOPY, PAGE_EXECUTE_WRITECOPY}}, + {{PAGE_READONLY, PAGE_EXECUTE_READ}, {PAGE_READWRITE, PAGE_EXECUTE_READWRITE}}}; + + DWORD old_protect; + return static_cast( + VirtualProtect(address, length, protection_table[readable][writable][executable], &old_protect)); +#elif defined(__linux__) || defined(__ANDROID__) || defined(__APPLE__) || defined(__FreeBSD__) + const int prot = (readable ? PROT_READ : 0) | (writable ? PROT_WRITE : 0) | (executable ? PROT_EXEC : 0); + return (mprotect(address, length, prot) >= 0); +#else + return false; +#endif +} + +MemoryArena::View::View(MemoryArena* parent, void* base_pointer, size_t arena_offset, size_t mapping_size, + bool writable) + : m_parent(parent), m_base_pointer(base_pointer), m_arena_offset(arena_offset), m_mapping_size(mapping_size), + m_writable(writable) +{ +} + +MemoryArena::View::View(View&& view) + : m_parent(view.m_parent), m_base_pointer(view.m_base_pointer), m_arena_offset(view.m_arena_offset), + m_mapping_size(view.m_mapping_size) +{ + view.m_parent = nullptr; + view.m_base_pointer = nullptr; + view.m_arena_offset = 0; + view.m_mapping_size = 0; +} + +MemoryArena::View::~View() +{ + if (m_parent) + { + if (m_arena_offset != RESERVED_REGION_OFFSET) + { + if (m_writable && !m_parent->FlushViewPtr(m_base_pointer, m_mapping_size)) { + printf("Failed to flush previously-created view"); + std::abort(); + } + if (!m_parent->ReleaseViewPtr(m_base_pointer, m_mapping_size)) { + printf("Failed to unmap previously-created view"); + std::abort(); + } + } + else + { + if (!m_parent->ReleaseReservedPtr(m_base_pointer, m_mapping_size)) { + printf("Failed to release previously-created view"); + std::abort(); + } + } + } +} +} // namespace Common