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core: Rewrite thread local storage implementation (#118)

This commit is contained in:
TheTurtle 2024-05-01 13:38:41 +03:00 committed by GitHub
parent b94efcba5a
commit 1b9bf924ca
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
11 changed files with 176 additions and 189 deletions
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3
.gitmodules vendored
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@ -61,3 +61,6 @@
[submodule "externals/boost"]
path = externals/boost
url = https://github.com/raphaelthegreat/ext-boost
[submodule "externals/xbyak"]
path = externals/xbyak
url = https://github.com/herumi/xbyak

66
CMakeLists.txt
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@ -341,46 +341,46 @@ set(QT_GUI
)
endif()
if(ENABLE_QT_GUI)
qt_add_executable(shadps4
${AUDIO_CORE}
${INPUT}
${QT_GUI}
${COMMON}
${CORE}
${VIDEO_CORE}
src/sdl_window.h
src/sdl_window.cpp
)
if (ENABLE_QT_GUI)
qt_add_executable(shadps4
${AUDIO_CORE}
${INPUT}
${QT_GUI}
${COMMON}
${CORE}
${VIDEO_CORE}
src/sdl_window.h
src/sdl_window.cpp
)
else()
add_executable(shadps4
${AUDIO_CORE}
${INPUT}
${COMMON}
${CORE}
${VIDEO_CORE}
src/main.cpp
src/sdl_window.h
src/sdl_window.cpp
)
add_executable(shadps4
${AUDIO_CORE}
${INPUT}
${COMMON}
${CORE}
${VIDEO_CORE}
src/main.cpp
src/sdl_window.h
src/sdl_window.cpp
)
endif()
create_target_directory_groups(shadps4)
target_link_libraries(shadps4 PRIVATE magic_enum::magic_enum fmt::fmt toml11::toml11 tsl::robin_map)
target_link_libraries(shadps4 PRIVATE magic_enum::magic_enum fmt::fmt toml11::toml11 tsl::robin_map xbyak)
target_link_libraries(shadps4 PRIVATE discord-rpc boost vma vulkan-headers xxhash Zydis SPIRV glslang SDL3-shared)
if(NOT ENABLE_QT_GUI)
if (NOT ENABLE_QT_GUI)
target_link_libraries(shadps4 PRIVATE SDL3-shared)
endif()
if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND MSVC)
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND MSVC)
target_link_libraries(shadps4 PRIVATE cryptoppwin zlib)
else()
target_link_libraries(shadps4 PRIVATE cryptopp::cryptopp zlib)
endif()
if(ENABLE_QT_GUI)
if (ENABLE_QT_GUI)
target_link_libraries(shadps4 PRIVATE Qt6::Widgets Qt6::Concurrent)
endif()
@ -388,22 +388,24 @@ if (WIN32)
target_link_libraries(shadps4 PRIVATE mincore winpthread clang_rt.builtins-x86_64.lib)
add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS)
add_definitions(-DNOMINMAX -DWIN32_LEAN_AND_MEAN)
add_definitions(-D_TIMESPEC_DEFINED) #needed for conflicts with time.h of windows.h
if (MSVC)
# Needed for conflicts with time.h of windows.h
add_definitions(-D_TIMESPEC_DEFINED)
endif()
# Target Windows 10 RS5
add_definitions(-DNTDDI_VERSION=0x0A000006 -D_WIN32_WINNT=0x0A00 -DWINVER=0x0A00)
endif()
if(WIN32)
if (WIN32)
target_sources(shadps4 PRIVATE src/shadps4.rc)
endif()
target_include_directories(shadps4 PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
if(ENABLE_QT_GUI)
set_target_properties(shadps4 PROPERTIES
WIN32_EXECUTABLE ON
MACOSX_BUNDLE ON
)
if (ENABLE_QT_GUI)
set_target_properties(shadps4 PROPERTIES
WIN32_EXECUTABLE ON
MACOSX_BUNDLE ON)
endif()
add_custom_command(TARGET shadps4 POST_BUILD

5
externals/CMakeLists.txt vendored
View File

@ -62,4 +62,7 @@ set(ENABLE_OPT OFF CACHE BOOL "")
add_subdirectory(glslang)
# Robin-map
add_subdirectory(robin-map)
add_subdirectory(robin-map EXCLUDE_FROM_ALL)
# Xbyak
add_subdirectory(xbyak EXCLUDE_FROM_ALL)

1
externals/xbyak vendored Submodule

@ -0,0 +1 @@
Subproject commit 80477f635345e8f13efc512d84b01b94cad92cd9

32
src/common/logging/backend.cpp
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@ -175,28 +175,18 @@ public:
using std::chrono::microseconds;
using std::chrono::steady_clock;
const Entry entry = {
.timestamp = duration_cast<microseconds>(steady_clock::now() - time_origin),
.log_class = log_class,
.log_level = log_level,
.filename = filename,
.line_num = line_num,
.function = function,
.message = std::move(message),
};
if (Config::getLogType() == "async") {
message_queue.EmplaceWait(Entry{
.timestamp = duration_cast<microseconds>(steady_clock::now() - time_origin),
.log_class = log_class,
.log_level = log_level,
.filename = filename,
.line_num = line_num,
.function = function,
.message = std::move(message),
});
message_queue.EmplaceWait(entry);
} else {
const Entry entry = {
.timestamp = duration_cast<microseconds>(steady_clock::now() - time_origin),
.log_class = log_class,
.log_level = log_level,
.filename = filename,
.line_num = line_num,
.function = function,
.message = std::move(message),
};
ForEachBackend([&entry](auto& backend) { backend.Write(entry); });
}
}
@ -239,7 +229,7 @@ private:
}
void ForEachBackend(auto lambda) {
lambda(debugger_backend);
// lambda(debugger_backend);
lambda(color_console_backend);
lambda(file_backend);
}

28
src/core/linker.cpp
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@ -3,6 +3,7 @@
#include <Zydis/Zydis.h>
#include <common/assert.h>
#include <xbyak/xbyak.h>
#include "common/config.h"
#include "common/logging/log.h"
#include "common/path_util.h"
@ -94,12 +95,17 @@ void Linker::LoadModuleToMemory(Module* m) {
0x1000; // align base size to 0x1000 block size (TODO is that the default
// block size or it can be changed?
m->base_virtual_addr = VirtualMemory::memory_alloc(LoadAddress, m->aligned_base_size,
VirtualMemory::MemoryMode::ExecuteReadWrite);
static constexpr u64 TrampolineSize = 8_MB;
m->base_virtual_addr =
VirtualMemory::memory_alloc(LoadAddress, m->aligned_base_size + TrampolineSize,
VirtualMemory::MemoryMode::ExecuteReadWrite);
LoadAddress += CODE_BASE_INCR * (1 + m->aligned_base_size / CODE_BASE_INCR);
LOG_INFO(Core_Linker, "====Load Module to Memory ========");
void* trampoline_addr = reinterpret_cast<void*>(m->base_virtual_addr + m->aligned_base_size);
Xbyak::CodeGenerator c(TrampolineSize, trampoline_addr);
LOG_INFO(Core_Linker, "======== Load Module to Memory ========");
LOG_INFO(Core_Linker, "base_virtual_addr ......: {:#018x}", m->base_virtual_addr);
LOG_INFO(Core_Linker, "base_size ..............: {:#018x}", base_size);
LOG_INFO(Core_Linker, "aligned_base_size ......: {:#018x}", m->aligned_base_size);
@ -123,7 +129,7 @@ void Linker::LoadModuleToMemory(Module* m) {
m->elf.LoadSegment(segment_addr, elf_pheader[i].p_offset, segment_file_size);
if (elf_pheader[i].p_flags & PF_EXEC) {
PatchTLS(segment_addr, segment_file_size);
PatchTLS(segment_addr, segment_file_size, c);
}
} else {
LOG_ERROR(Core_Linker, "p_memsz==0 in type {}",
@ -153,8 +159,8 @@ void Linker::LoadModuleToMemory(Module* m) {
case PT_TLS:
m->tls.image_virtual_addr = elf_pheader[i].p_vaddr + m->base_virtual_addr;
m->tls.image_size = GetAlignedSize(elf_pheader[i]);
LOG_INFO(Core_Linker, "tls virtual address ={:#x}", m->tls.image_virtual_addr);
LOG_INFO(Core_Linker, "tls image size ={}", m->tls.image_size);
LOG_INFO(Core_Linker, "TLS virtual address = {:#x}", m->tls.image_virtual_addr);
LOG_INFO(Core_Linker, "TLS image size = {}", m->tls.image_size);
break;
case PT_SCE_PROCPARAM:
m->proc_param_virtual_addr = elf_pheader[i].p_vaddr + m->base_virtual_addr;
@ -662,7 +668,7 @@ static void RunMainEntry(u64 addr, EntryParams* params, exit_func_t exit_func) {
// there's no coming back
:
: "r"(addr), "r"(params), "r"(exit_func)
: "rax", "rsi", "rdi", "rsp");
: "rax", "rsi", "rdi");
}
void Linker::Execute() {
@ -681,9 +687,13 @@ void Linker::Execute() {
p.argv[0] = "eboot.bin"; // hmm should be ok?
for (auto& m : m_modules) {
if (!m->elf.IsSharedLib()) {
RunMainEntry(m->elf.GetElfEntry() + m->base_virtual_addr, &p, ProgramExitFunc);
if (m->elf.IsSharedLib()) {
continue;
}
if (m->tls.image_virtual_addr != 0) {
SetTLSStorage(m->tls.image_virtual_addr);
}
RunMainEntry(m->elf.GetElfEntry() + m->base_virtual_addr, &p, ProgramExitFunc);
}
}

194
src/core/tls.cpp
View File

@ -1,6 +1,7 @@
// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <xbyak/xbyak.h>
#include "common/assert.h"
#include "common/types.h"
#include "core/tls.h"
@ -11,25 +12,18 @@
namespace Core {
thread_local u8 TLS[1024];
struct TLSPattern {
uint8_t pattern[5];
uint8_t pattern_size;
uint8_t imm_size;
uint8_t target_reg;
u8 pattern[5];
u8 pattern_size;
u8 imm_size;
u8 target_reg;
};
constexpr static TLSPattern TlsPatterns[] = {
{{0x64, 0x48, 0xA1},
3,
8,
0}, // 64 48 A1 | 00 00 00 00 00 00 00 00 # mov rax, qword ptr fs:[64b imm]
{{0x64, 0x48, 0x8B, 0x4, 0x25},
5,
4,
0}, // 64 48 8B 04 25 | 00 00 00 00 # mov rax,qword ptr fs:[0]
// 64 48 A1 | 00 00 00 00 00 00 00 00 # mov rax, qword ptr fs:[64b imm]
{{0x64, 0x48, 0xA1}, 3, 8, 0},
// 64 48 8B 04 25 | 00 00 00 00 # mov rax,qword ptr fs:[0]
{{0x64, 0x48, 0x8B, 0x4, 0x25}, 5, 4, 0}, // rax
{{0x64, 0x48, 0x8B, 0xC, 0x25}, 5, 4, 1}, // rcx
{{0x64, 0x48, 0x8B, 0x14, 0x25}, 5, 4, 2}, // rdx
{{0x64, 0x48, 0x8B, 0x1C, 0x25}, 5, 4, 3}, // rbx
@ -47,103 +41,28 @@ constexpr static TLSPattern TlsPatterns[] = {
{{0x64, 0x4C, 0x8B, 0x3C, 0x25}, 5, 4, 15}, // r15
};
uintptr_t GetGuestTls(s64 tls_offset) {
if (tls_offset == 0) {
return reinterpret_cast<uintptr_t>(TLS);
}
UNREACHABLE_MSG("Unimplemented offset info tls");
#ifdef _WIN32
static DWORD slot = 0;
void SetTLSStorage(u64 image_address) {
// Guest apps will use both positive and negative offsets to the TLS pointer.
// User data at probably in negative offsets, while pthread data at positive offset.
const BOOL result = TlsSetValue(slot, reinterpret_cast<LPVOID>(image_address));
ASSERT(result != 0);
}
#ifdef _WIN64
static LONG WINAPI ExceptionHandler(PEXCEPTION_POINTERS pExp) noexcept {
auto orig_rip = pExp->ContextRecord->Rip;
while (*(u8*)pExp->ContextRecord->Rip == 0x66) {
pExp->ContextRecord->Rip++;
}
void PatchTLS(u64 segment_addr, u64 segment_size, Xbyak::CodeGenerator& c) {
using namespace Xbyak::util;
if (*(u8*)pExp->ContextRecord->Rip == 0xcd) {
int reg = *(u8*)(pExp->ContextRecord->Rip + 1) - 0x80;
int sizes = *(u8*)(pExp->ContextRecord->Rip + 2);
int pattern_size = sizes & 0xF;
int imm_size = sizes >> 4;
int64_t tls_offset;
if (imm_size == 4) {
tls_offset = *(s32*)(pExp->ContextRecord->Rip + pattern_size);
} else {
tls_offset = *(s64*)(pExp->ContextRecord->Rip + pattern_size);
}
(&pExp->ContextRecord->Rax)[reg] = GetGuestTls(tls_offset); /* GetGuestTls */
pExp->ContextRecord->Rip += pattern_size + imm_size;
return EXCEPTION_CONTINUE_EXECUTION;
}
pExp->ContextRecord->Rip = orig_rip;
const u32 ec = pExp->ExceptionRecord->ExceptionCode;
switch (ec) {
case EXCEPTION_ACCESS_VIOLATION: {
LOG_CRITICAL(Core, "Exception EXCEPTION_ACCESS_VIOLATION ({:#x})", ec);
const auto info = pExp->ExceptionRecord->ExceptionInformation;
switch (info[0]) {
case 0:
LOG_CRITICAL(Core, "Read violation at address {:#x}", info[1]);
break;
case 1:
LOG_CRITICAL(Core, "Write violation at address {:#x}", info[1]);
break;
case 8:
LOG_CRITICAL(Core, "DEP violation at address {:#x}", info[1]);
break;
default:
break;
}
break;
}
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
LOG_CRITICAL(Core, "Exception EXCEPTION_ARRAY_BOUNDS_EXCEEDED ({:#x})", ec);
break;
case EXCEPTION_DATATYPE_MISALIGNMENT:
LOG_CRITICAL(Core, "Exception EXCEPTION_DATATYPE_MISALIGNMENT ({:#x})", ec);
break;
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
LOG_CRITICAL(Core, "Exception EXCEPTION_FLT_DIVIDE_BY_ZERO ({:#x})", ec);
break;
case EXCEPTION_ILLEGAL_INSTRUCTION:
LOG_CRITICAL(Core, "Exception EXCEPTION_ILLEGAL_INSTRUCTION ({:#x})", ec);
break;
case EXCEPTION_IN_PAGE_ERROR:
LOG_CRITICAL(Core, "Exception EXCEPTION_IN_PAGE_ERROR ({:#x})", ec);
break;
case EXCEPTION_INT_DIVIDE_BY_ZERO:
LOG_CRITICAL(Core, "Exception EXCEPTION_INT_DIVIDE_BY_ZERO ({:#x})", ec);
break;
case EXCEPTION_PRIV_INSTRUCTION:
LOG_CRITICAL(Core, "Exception EXCEPTION_PRIV_INSTRUCTION ({:#x})", ec);
break;
case EXCEPTION_STACK_OVERFLOW:
LOG_CRITICAL(Core, "Exception EXCEPTION_STACK_OVERFLOW ({:#x})", ec);
break;
default:
return EXCEPTION_CONTINUE_SEARCH;
}
return EXCEPTION_CONTINUE_SEARCH;
}
#endif
void InstallTlsHandler() {
#ifdef _WIN64
if (!AddVectoredExceptionHandler(0, ExceptionHandler)) {
LOG_CRITICAL(Core, "Failed to register an exception handler");
}
#endif
}
void PatchTLS(u64 segment_addr, u64 segment_size) {
u8* code = reinterpret_cast<u8*>(segment_addr);
auto remaining_size = segment_size;
// Sometimes loads from the FS segment are prefixed with useless operand size prefix bytes like:
// |66 66 66| 64 48 8b 04 25 00 # mov rax, qword ptr fs:[0x0]
// These are probably ignored by the processor but when patching the instruction to a jump
// they cause issues. So look for them and patch them to nop to avoid problems.
static constexpr std::array<u8, 3> BadPrefix = {0x66, 0x66, 0x66};
while (remaining_size) {
for (const auto& tls_pattern : TlsPatterns) {
const auto total_size = tls_pattern.pattern_size + tls_pattern.imm_size;
@ -153,18 +72,55 @@ void PatchTLS(u64 segment_addr, u64 segment_size) {
if (std::memcmp(code, tls_pattern.pattern, tls_pattern.pattern_size) != 0) {
continue;
}
u64 offset = 0;
if (tls_pattern.imm_size == 4) {
std::memcpy(&offset, code + tls_pattern.pattern_size, sizeof(u32));
LOG_INFO(Core_Linker, "PATTERN32 FOUND at {}, reg: {} offset: {:#x}",
fmt::ptr(code), tls_pattern.target_reg,
*(u32*)(code + tls_pattern.pattern_size));
fmt::ptr(code), tls_pattern.target_reg, offset);
} else {
std::memcpy(&offset, code + tls_pattern.pattern_size, sizeof(u64));
LOG_INFO(Core_Linker, "PATTERN64 FOUND at {}, reg: {} offset: {:#x}",
fmt::ptr(code), tls_pattern.target_reg,
*(u32*)(code + tls_pattern.pattern_size));
fmt::ptr(code), tls_pattern.target_reg, offset);
}
code[0] = 0xcd;
code[1] = 0x80 + tls_pattern.target_reg;
code[2] = tls_pattern.pattern_size | (tls_pattern.imm_size << 4);
ASSERT(offset == 0);
// Allocate slot in the process if not done already.
if (slot == 0) {
slot = TlsAlloc();
}
// Replace bogus instruction prefix with nops if it exists.
if (std::memcmp(code - BadPrefix.size(), BadPrefix.data(), sizeof(BadPrefix)) == 0) {
auto patch = Xbyak::CodeGenerator(BadPrefix.size(), code - BadPrefix.size());
patch.nop(BadPrefix.size());
}
// Replace mov instruction with near jump to the trampoline.
static constexpr u32 NearJmpSize = 5;
auto patch = Xbyak::CodeGenerator(total_size, code);
patch.jmp(c.getCurr(), Xbyak::CodeGenerator::LabelType::T_NEAR);
patch.nop(total_size - NearJmpSize);
// Write the trampoline.
// The following logic is based on the wine implementation of TlsGetValue
// https://github.com/wine-mirror/wine/blob/a27b9551/dlls/kernelbase/thread.c#L719
static constexpr u32 TlsSlotsOffset = 0x1480;
static constexpr u32 TlsExpansionSlotsOffset = 0x1780;
static constexpr u32 TlsMinimumAvailable = 64;
const u32 teb_offset =
slot < TlsMinimumAvailable ? TlsSlotsOffset : TlsExpansionSlotsOffset;
const u32 tls_index = slot < TlsMinimumAvailable ? slot : slot - TlsMinimumAvailable;
const auto target_reg = Xbyak::Reg64(tls_pattern.target_reg);
c.mov(target_reg, teb_offset);
c.putSeg(gs);
c.mov(target_reg, ptr[target_reg]); // Load the pointer to the table of tls slots.
c.mov(
target_reg,
qword[target_reg + tls_index * sizeof(LPVOID)]); // Load the pointer to our buffer.
c.jmp(code + total_size); // Return to the instruction right after the mov.
// Move ahead in module.
code += total_size - 1;
remaining_size -= total_size - 1;
break;
@ -174,4 +130,16 @@ void PatchTLS(u64 segment_addr, u64 segment_size) {
}
}
#else
void SetTLSStorage(u64 image_address) {
UNREACHABLE_MSG("Thread local storage is unimplemented on posix platforms!");
}
void PatchTLS(u64 segment_addr, u64 segment_size, Xbyak::CodeGenerator& c) {
UNREACHABLE_MSG("Thread local storage is unimplemented on posix platforms!");
}
#endif
} // namespace Core

12
src/core/tls.h
View File

@ -5,12 +5,16 @@
#include "common/types.h"
namespace Xbyak {
class CodeGenerator;
}
namespace Core {
/// Installs a host exception handler to handle guest TLS access.
void InstallTlsHandler();
/// Sets the data pointer that contains the TLS image.
void SetTLSStorage(u64 image_address);
/// Patches any instructions that access TLS to trigger the exception handler.
void PatchTLS(u64 segment_addr, u64 segment_size);
/// Patches any instructions that access guest TLS to use provided storage.
void PatchTLS(u64 segment_addr, u64 segment_size, Xbyak::CodeGenerator& c);
} // namespace Core

1
src/main.cpp
View File

@ -50,7 +50,6 @@ int main(int argc, char* argv[]) {
auto linker = Common::Singleton<Core::Linker>::Instance();
Libraries::InitHLELibs(&linker->getHLESymbols());
Core::InstallTlsHandler();
linker->LoadModule(path);
// Check if there is a libc.prx in sce_module folder

15
src/video_core/texture_cache/texture_cache.cpp
View File

@ -1,9 +1,11 @@
// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <limits>
#include "common/assert.h"
#include "common/config.h"
#include "core/libraries/videoout/buffer.h"
#include "core/virtual_memory.h"
#include "video_core/renderer_vulkan/vk_scheduler.h"
#include "video_core/texture_cache/texture_cache.h"
#include "video_core/texture_cache/tile_manager.h"
@ -15,7 +17,7 @@
#define PAGE_NOACCESS PROT_NONE
#define PAGE_READWRITE (PROT_READ | PROT_WRITE)
#else
#include <Windows.h>
#include <windows.h>
void mprotect(void* addr, size_t len, int prot) {
DWORD old_prot{};
@ -57,6 +59,7 @@ LONG WINAPI GuestFaultSignalHandler(EXCEPTION_POINTERS* pExp) noexcept {
#endif
static constexpr u64 StreamBufferSize = 128_MB;
static constexpr u64 PageShift = 12;
TextureCache::TextureCache(const Vulkan::Instance& instance_, Vulkan::Scheduler& scheduler_)
: instance{instance_}, scheduler{scheduler_},
@ -76,7 +79,7 @@ TextureCache::TextureCache(const Vulkan::Instance& instance_, Vulkan::Scheduler&
guest_access_fault.sa_mask = signal_mask;
sigaction(SIGSEGV, &guest_access_fault, nullptr);
#else
veh_handle = AddVectoredExceptionHandler(1, GuestFaultSignalHandler);
veh_handle = AddVectoredExceptionHandler(0, GuestFaultSignalHandler);
ASSERT_MSG(veh_handle, "Failed to register an exception handler");
#endif
g_texture_cache = this;
@ -243,8 +246,8 @@ void TextureCache::UntrackImage(Image& image, ImageId image_id) {
}
void TextureCache::UpdatePagesCachedCount(VAddr addr, u64 size, s32 delta) {
const u64 num_pages = ((addr + size - 1) >> PageBits) - (addr >> PageBits) + 1;
const u64 page_start = addr >> PageBits;
const u64 num_pages = ((addr + size - 1) >> PageShift) - (addr >> PageShift) + 1;
const u64 page_start = addr >> PageShift;
const u64 page_end = page_start + num_pages;
const auto pages_interval =
@ -256,8 +259,8 @@ void TextureCache::UpdatePagesCachedCount(VAddr addr, u64 size, s32 delta) {
const auto& range = cached_pages.equal_range(pages_interval);
for (const auto& [range, count] : boost::make_iterator_range(range)) {
const auto interval = range & pages_interval;
const VAddr interval_start_addr = boost::icl::first(interval) << PageBits;
const VAddr interval_end_addr = boost::icl::last_next(interval) << PageBits;
const VAddr interval_start_addr = boost::icl::first(interval) << PageShift;
const VAddr interval_end_addr = boost::icl::last_next(interval) << PageShift;
const u32 interval_size = interval_end_addr - interval_start_addr;
void* addr = reinterpret_cast<void*>(interval_start_addr);
if (delta > 0 && count == delta) {

8
src/video_core/texture_cache/texture_cache.h
View File

@ -3,7 +3,6 @@
#pragma once
#include <forward_list>
#include <boost/container/small_vector.hpp>
#include <boost/icl/interval_map.hpp>
#include <tsl/robin_map.h>
@ -19,7 +18,12 @@ struct BufferAttributeGroup;
namespace VideoCore {
class TextureCache {
static constexpr u64 PageBits = 14;
// This is the page shift for adding images into the hash map. It isn't related to
// the page size of the guest or the host and is chosen for convenience. A number too
// small will increase the number of hash map lookups per image, while too large will
// increase the number of images per page.
static constexpr u64 PageBits = 20;
static constexpr u64 PageMask = (1ULL << PageBits) - 1;
public:
explicit TextureCache(const Vulkan::Instance& instance, Vulkan::Scheduler& scheduler);