ce67514572
New CMake preset `cross-win-clangcl` for Ninja Multi-Config on non-Windows hosts. Toolchain: clang-cl (MSVC-ABI), lld-link, xwin SDK/CRT splat. Shader compilation routes through wine fxc.exe with FXC_PATH env forwarding and unix→Windows path translation via `winepath -w`. Plus per-file build fixes (constexpr→const, llvm-rc forward-slash, zlib-ng AVX guard, /RTCsu MSVC-only). third_party/snappy bumped to fabi/sylpheed-crossbuild for the target-aware POSIX-gate header. Produces `xenia_canary.exe` (Debug MSVC) suitable for use as the audit oracle under Wine for xenia-rs work. See docs/CROSS_BUILD_SETUP.md for the full reproduction recipe. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
372 lines
12 KiB
C++
372 lines
12 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2020 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include <mutex>
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#include "third_party/fmt/include/fmt/format.h"
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#include "xenia/base/logging.h"
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#include "xenia/base/mapped_memory.h"
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#include "xenia/base/math.h"
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#include "xenia/base/memory.h"
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#include "xenia/base/platform_win.h"
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#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | \
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WINAPI_PARTITION_SYSTEM | WINAPI_PARTITION_GAMES)
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#define XE_BASE_MAPPED_MEMORY_WIN_USE_DESKTOP_FUNCTIONS
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#endif
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namespace xe {
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class Win32MappedMemory : public MappedMemory {
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public:
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// CreateFile returns INVALID_HANDLE_VALUE in case of failure.
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// INVALID_HANDLE_VALUE expands to a reinterpret_cast which MSVC accepts
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// in constexpr as an extension; clang-cl rejects it per C++ standard.
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static inline const HANDLE kFileHandleInvalid = INVALID_HANDLE_VALUE;
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// CreateFileMapping returns nullptr in case of failure.
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static constexpr HANDLE kMappingHandleInvalid = nullptr;
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~Win32MappedMemory() override {
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if (data_) {
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UnmapViewOfFile(data_);
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}
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if (mapping_handle != kMappingHandleInvalid) {
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CloseHandle(mapping_handle);
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}
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if (file_handle != kFileHandleInvalid) {
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CloseHandle(file_handle);
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}
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}
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void Close(uint64_t truncate_size) override {
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if (data_) {
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UnmapViewOfFile(data_);
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data_ = nullptr;
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}
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if (mapping_handle != kMappingHandleInvalid) {
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CloseHandle(mapping_handle);
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mapping_handle = kMappingHandleInvalid;
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}
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if (file_handle != kFileHandleInvalid) {
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if (truncate_size) {
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LONG distance_high = truncate_size >> 32;
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SetFilePointer(file_handle, truncate_size & 0xFFFFFFFF, &distance_high,
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FILE_BEGIN);
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SetEndOfFile(file_handle);
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}
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CloseHandle(file_handle);
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file_handle = kFileHandleInvalid;
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}
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}
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void Flush() override { FlushViewOfFile(data(), size()); }
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bool Remap(size_t offset, size_t length) override {
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size_t aligned_offset = offset & ~(memory::allocation_granularity() - 1);
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size_t aligned_length = length + (offset - aligned_offset);
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UnmapViewOfFile(data_);
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#ifdef XE_BASE_MAPPED_MEMORY_WIN_USE_DESKTOP_FUNCTIONS
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data_ = MapViewOfFile(mapping_handle, view_access_, aligned_offset >> 32,
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aligned_offset & 0xFFFFFFFF, aligned_length);
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#else
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data_ = MapViewOfFileFromApp(mapping_handle, ULONG(view_access_),
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ULONG64(aligned_offset), aligned_length);
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#endif
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if (!data_) {
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return false;
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}
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if (length) {
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size_ = aligned_length;
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} else {
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DWORD length_high;
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size_t map_length = GetFileSize(file_handle, &length_high);
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map_length |= static_cast<uint64_t>(length_high) << 32;
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size_ = map_length - aligned_offset;
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}
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return true;
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}
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HANDLE file_handle = kFileHandleInvalid;
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HANDLE mapping_handle = kMappingHandleInvalid;
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DWORD view_access_ = 0;
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};
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std::unique_ptr<MappedMemory> MappedMemory::Open(
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const std::filesystem::path& path, Mode mode, size_t offset,
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size_t length) {
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DWORD file_access = 0;
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DWORD file_share = 0;
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DWORD create_mode = 0;
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DWORD mapping_protect = 0;
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DWORD view_access = 0;
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switch (mode) {
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case Mode::kRead:
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file_access |= GENERIC_READ;
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file_share |= FILE_SHARE_READ;
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create_mode |= OPEN_EXISTING;
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mapping_protect |= PAGE_READONLY;
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view_access |= FILE_MAP_READ;
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break;
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case Mode::kReadWrite:
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file_access |= GENERIC_READ | GENERIC_WRITE;
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file_share |= 0;
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create_mode |= OPEN_EXISTING;
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mapping_protect |= PAGE_READWRITE;
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view_access |= FILE_MAP_READ | FILE_MAP_WRITE;
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break;
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}
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SYSTEM_INFO system_info;
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GetSystemInfo(&system_info);
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const size_t aligned_offset =
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offset & ~static_cast<size_t>(system_info.dwAllocationGranularity - 1);
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const size_t aligned_length = length + (offset - aligned_offset);
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auto mm = std::make_unique<Win32MappedMemory>();
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mm->view_access_ = view_access;
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mm->file_handle = CreateFile(path.c_str(), file_access, file_share, nullptr,
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create_mode, FILE_ATTRIBUTE_NORMAL, nullptr);
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if (mm->file_handle == Win32MappedMemory::kFileHandleInvalid) {
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return nullptr;
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}
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#ifdef XE_BASE_MAPPED_MEMORY_WIN_USE_DESKTOP_FUNCTIONS
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mm->mapping_handle = CreateFileMapping(
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mm->file_handle, nullptr, mapping_protect, DWORD(aligned_length >> 32),
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DWORD(aligned_length), nullptr);
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#else
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mm->mapping_handle =
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CreateFileMappingFromApp(mm->file_handle, nullptr, ULONG(mapping_protect),
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ULONG64(aligned_length), nullptr);
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#endif
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if (mm->mapping_handle == Win32MappedMemory::kMappingHandleInvalid) {
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return nullptr;
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}
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#ifdef XE_BASE_MAPPED_MEMORY_WIN_USE_DESKTOP_FUNCTIONS
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mm->data_ = reinterpret_cast<uint8_t*>(MapViewOfFile(
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mm->mapping_handle, view_access, DWORD(aligned_offset >> 32),
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DWORD(aligned_offset), aligned_length));
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#else
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mm->data_ = reinterpret_cast<uint8_t*>(
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MapViewOfFileFromApp(mm->mapping_handle, ULONG(view_access),
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ULONG64(aligned_offset), aligned_length));
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#endif
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if (!mm->data_) {
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return nullptr;
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}
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if (length) {
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mm->size_ = aligned_length;
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} else {
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DWORD length_high;
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size_t map_length = GetFileSize(mm->file_handle, &length_high);
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map_length |= static_cast<uint64_t>(length_high) << 32;
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mm->size_ = map_length - aligned_offset;
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}
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return std::move(mm);
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}
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class Win32ChunkedMappedMemoryWriter : public ChunkedMappedMemoryWriter {
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public:
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Win32ChunkedMappedMemoryWriter(const std::filesystem::path& path,
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size_t chunk_size, bool low_address_space)
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: ChunkedMappedMemoryWriter(path, chunk_size, low_address_space) {}
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~Win32ChunkedMappedMemoryWriter() override {
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std::lock_guard<std::mutex> lock(mutex_);
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chunks_.clear();
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}
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uint8_t* Allocate(size_t length) override {
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std::lock_guard<std::mutex> lock(mutex_);
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if (!chunks_.empty()) {
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uint8_t* result = chunks_.back()->Allocate(length);
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if (result != nullptr) {
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return result;
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}
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}
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auto chunk = std::make_unique<Chunk>(chunk_size_);
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auto chunk_path =
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path_.replace_extension(fmt::format(".{}", chunks_.size()));
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if (!chunk->Open(chunk_path, low_address_space_)) {
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return nullptr;
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}
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uint8_t* result = chunk->Allocate(length);
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chunks_.push_back(std::move(chunk));
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return result;
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}
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void Flush() override {
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std::lock_guard<std::mutex> lock(mutex_);
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for (auto& chunk : chunks_) {
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chunk->Flush();
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}
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}
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void FlushNew() override {
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std::lock_guard<std::mutex> lock(mutex_);
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for (auto& chunk : chunks_) {
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chunk->FlushNew();
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}
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}
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private:
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class Chunk {
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public:
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explicit Chunk(size_t capacity)
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: file_handle_(Win32MappedMemory::kFileHandleInvalid),
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mapping_handle_(Win32MappedMemory::kMappingHandleInvalid),
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data_(nullptr),
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offset_(0),
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capacity_(capacity),
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last_flush_offset_(0) {}
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~Chunk() {
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if (data_) {
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UnmapViewOfFile(data_);
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}
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if (mapping_handle_ != Win32MappedMemory::kMappingHandleInvalid) {
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CloseHandle(mapping_handle_);
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}
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if (file_handle_ != Win32MappedMemory::kFileHandleInvalid) {
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CloseHandle(file_handle_);
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}
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}
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bool Open(const std::filesystem::path& path, bool low_address_space) {
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DWORD file_access = GENERIC_READ | GENERIC_WRITE;
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DWORD file_share = FILE_SHARE_READ;
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DWORD create_mode = CREATE_ALWAYS;
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DWORD mapping_protect = PAGE_READWRITE;
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DWORD view_access = FILE_MAP_READ | FILE_MAP_WRITE;
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file_handle_ = CreateFile(path.c_str(), file_access, file_share, nullptr,
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create_mode, FILE_ATTRIBUTE_NORMAL, nullptr);
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if (file_handle_ == Win32MappedMemory::kFileHandleInvalid) {
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return false;
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}
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#ifdef XE_BASE_MAPPED_MEMORY_WIN_USE_DESKTOP_FUNCTIONS
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mapping_handle_ =
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CreateFileMapping(file_handle_, nullptr, mapping_protect,
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DWORD(capacity_ >> 32), DWORD(capacity_), nullptr);
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#else
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mapping_handle_ = CreateFileMappingFromApp(file_handle_, nullptr,
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ULONG(mapping_protect),
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ULONG64(capacity_), nullptr);
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#endif
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if (mapping_handle_ == Win32MappedMemory::kMappingHandleInvalid) {
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return false;
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}
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// If specified, ensure the allocation occurs in the lower 32-bit address
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// space.
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if (low_address_space) {
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bool successful = false;
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data_ = reinterpret_cast<uint8_t*>(0x10000000);
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#ifndef XE_BASE_MAPPED_MEMORY_WIN_USE_DESKTOP_FUNCTIONS
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HANDLE process = GetCurrentProcess();
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#endif
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for (int i = 0; i < 1000; ++i) {
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#ifdef XE_BASE_MAPPED_MEMORY_WIN_USE_DESKTOP_FUNCTIONS
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if (MapViewOfFileEx(mapping_handle_, view_access, 0, 0, capacity_,
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data_)) {
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successful = true;
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}
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#else
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// VirtualAlloc2FromApp and MapViewOfFile3FromApp were added in
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// 10.0.17134.0.
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// https://docs.microsoft.com/en-us/uwp/win32-and-com/win32-apis
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if (VirtualAlloc2FromApp(process, data_, capacity_,
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MEM_RESERVE | MEM_RESERVE_PLACEHOLDER,
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PAGE_NOACCESS, nullptr, 0)) {
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if (MapViewOfFile3FromApp(mapping_handle_, process, data_, 0,
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capacity_, MEM_REPLACE_PLACEHOLDER,
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ULONG(mapping_protect), nullptr, 0)) {
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successful = true;
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} else {
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VirtualFree(data_, capacity_, MEM_RELEASE);
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}
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}
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#endif
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if (successful) {
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break;
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}
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data_ += capacity_;
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if (!successful) {
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XELOGE("Unable to find space for mapping");
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data_ = nullptr;
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return false;
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}
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}
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} else {
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#ifdef XE_BASE_MAPPED_MEMORY_WIN_USE_DESKTOP_FUNCTIONS
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data_ = reinterpret_cast<uint8_t*>(
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MapViewOfFile(mapping_handle_, view_access, 0, 0, capacity_));
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#else
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data_ = reinterpret_cast<uint8_t*>(MapViewOfFileFromApp(
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mapping_handle_, ULONG(view_access), 0, capacity_));
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#endif
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}
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if (!data_) {
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return false;
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}
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return true;
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}
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uint8_t* Allocate(size_t length) {
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if (capacity_ - offset_ < length) {
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return nullptr;
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}
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uint8_t* result = data_ + offset_;
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offset_ += length;
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return result;
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}
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void Flush() { FlushViewOfFile(data_, offset_); }
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void FlushNew() {
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FlushViewOfFile(data_ + last_flush_offset_, offset_ - last_flush_offset_);
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last_flush_offset_ = offset_;
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}
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private:
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HANDLE file_handle_;
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HANDLE mapping_handle_;
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uint8_t* data_;
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size_t offset_;
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size_t capacity_;
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size_t last_flush_offset_;
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};
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std::mutex mutex_;
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std::vector<std::unique_ptr<Chunk>> chunks_;
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};
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std::unique_ptr<ChunkedMappedMemoryWriter> ChunkedMappedMemoryWriter::Open(
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const std::filesystem::path& path, size_t chunk_size,
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bool low_address_space) {
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SYSTEM_INFO system_info;
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GetSystemInfo(&system_info);
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size_t aligned_chunk_size =
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xe::round_up(chunk_size, system_info.dwAllocationGranularity);
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return std::make_unique<Win32ChunkedMappedMemoryWriter>(
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path, aligned_chunk_size, low_address_space);
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}
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} // namespace xe
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