2abf979c35
We need to ensure dynarmic gets a valid pointer if the page table is resized (the relevant pointers would be invalidated in this scenario). In this scenario, the page table can be resized depending on what kind of address space is specified within the NPDM metadata (if it's present).
273 lines
10 KiB
C++
273 lines
10 KiB
C++
// Copyright 2015 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <memory>
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#include <random>
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#include "common/alignment.h"
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#include "common/assert.h"
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#include "common/logging/log.h"
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#include "core/core.h"
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#include "core/file_sys/program_metadata.h"
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#include "core/hle/kernel/code_set.h"
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#include "core/hle/kernel/errors.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/process.h"
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#include "core/hle/kernel/resource_limit.h"
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#include "core/hle/kernel/scheduler.h"
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#include "core/hle/kernel/thread.h"
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#include "core/hle/kernel/vm_manager.h"
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#include "core/memory.h"
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#include "core/settings.h"
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namespace Kernel {
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namespace {
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/**
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* Sets up the primary application thread
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*
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* @param owner_process The parent process for the main thread
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* @param kernel The kernel instance to create the main thread under.
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* @param entry_point The address at which the thread should start execution
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* @param priority The priority to give the main thread
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*/
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void SetupMainThread(Process& owner_process, KernelCore& kernel, VAddr entry_point, u32 priority) {
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// Initialize new "main" thread
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const VAddr stack_top = owner_process.VMManager().GetTLSIORegionEndAddress();
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auto thread_res = Thread::Create(kernel, "main", entry_point, priority, 0,
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owner_process.GetIdealCore(), stack_top, owner_process);
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SharedPtr<Thread> thread = std::move(thread_res).Unwrap();
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// Register 1 must be a handle to the main thread
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const Handle guest_handle = owner_process.GetHandleTable().Create(thread).Unwrap();
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thread->SetGuestHandle(guest_handle);
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thread->GetContext().cpu_registers[1] = guest_handle;
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// Threads by default are dormant, wake up the main thread so it runs when the scheduler fires
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thread->ResumeFromWait();
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}
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} // Anonymous namespace
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SharedPtr<Process> Process::Create(Core::System& system, std::string&& name) {
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auto& kernel = system.Kernel();
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SharedPtr<Process> process(new Process(system));
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process->name = std::move(name);
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process->resource_limit = kernel.GetSystemResourceLimit();
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process->status = ProcessStatus::Created;
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process->program_id = 0;
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process->process_id = kernel.CreateNewProcessID();
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process->capabilities.InitializeForMetadatalessProcess();
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std::mt19937 rng(Settings::values.rng_seed.value_or(0));
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std::uniform_int_distribution<u64> distribution;
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std::generate(process->random_entropy.begin(), process->random_entropy.end(),
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[&] { return distribution(rng); });
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kernel.AppendNewProcess(process);
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return process;
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}
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SharedPtr<ResourceLimit> Process::GetResourceLimit() const {
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return resource_limit;
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}
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u64 Process::GetTotalPhysicalMemoryUsed() const {
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return vm_manager.GetCurrentHeapSize() + main_thread_stack_size + code_memory_size;
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}
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void Process::RegisterThread(const Thread* thread) {
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thread_list.push_back(thread);
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}
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void Process::UnregisterThread(const Thread* thread) {
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thread_list.remove(thread);
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}
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ResultCode Process::ClearSignalState() {
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if (status == ProcessStatus::Exited) {
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LOG_ERROR(Kernel, "called on a terminated process instance.");
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return ERR_INVALID_STATE;
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}
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if (!is_signaled) {
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LOG_ERROR(Kernel, "called on a process instance that isn't signaled.");
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return ERR_INVALID_STATE;
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}
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is_signaled = false;
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return RESULT_SUCCESS;
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}
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ResultCode Process::LoadFromMetadata(const FileSys::ProgramMetadata& metadata) {
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program_id = metadata.GetTitleID();
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ideal_core = metadata.GetMainThreadCore();
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is_64bit_process = metadata.Is64BitProgram();
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vm_manager.Reset(metadata.GetAddressSpaceType());
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// Ensure that the potentially resized page table is seen by CPU backends.
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Memory::SetCurrentPageTable(&vm_manager.page_table);
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const auto& caps = metadata.GetKernelCapabilities();
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const auto capability_init_result =
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capabilities.InitializeForUserProcess(caps.data(), caps.size(), vm_manager);
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if (capability_init_result.IsError()) {
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return capability_init_result;
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}
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return handle_table.SetSize(capabilities.GetHandleTableSize());
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}
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void Process::Run(VAddr entry_point, s32 main_thread_priority, u64 stack_size) {
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// The kernel always ensures that the given stack size is page aligned.
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main_thread_stack_size = Common::AlignUp(stack_size, Memory::PAGE_SIZE);
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// Allocate and map the main thread stack
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// TODO(bunnei): This is heap area that should be allocated by the kernel and not mapped as part
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// of the user address space.
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const VAddr mapping_address = vm_manager.GetTLSIORegionEndAddress() - main_thread_stack_size;
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vm_manager
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.MapMemoryBlock(mapping_address, std::make_shared<std::vector<u8>>(main_thread_stack_size),
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0, main_thread_stack_size, MemoryState::Stack)
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.Unwrap();
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vm_manager.LogLayout();
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ChangeStatus(ProcessStatus::Running);
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SetupMainThread(*this, kernel, entry_point, main_thread_priority);
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}
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void Process::PrepareForTermination() {
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ChangeStatus(ProcessStatus::Exiting);
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const auto stop_threads = [this](const std::vector<SharedPtr<Thread>>& thread_list) {
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for (auto& thread : thread_list) {
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if (thread->GetOwnerProcess() != this)
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continue;
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if (thread == system.CurrentScheduler().GetCurrentThread())
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continue;
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// TODO(Subv): When are the other running/ready threads terminated?
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ASSERT_MSG(thread->GetStatus() == ThreadStatus::WaitSynchAny ||
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thread->GetStatus() == ThreadStatus::WaitSynchAll,
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"Exiting processes with non-waiting threads is currently unimplemented");
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thread->Stop();
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}
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};
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stop_threads(system.Scheduler(0).GetThreadList());
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stop_threads(system.Scheduler(1).GetThreadList());
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stop_threads(system.Scheduler(2).GetThreadList());
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stop_threads(system.Scheduler(3).GetThreadList());
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ChangeStatus(ProcessStatus::Exited);
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}
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/**
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* Finds a free location for the TLS section of a thread.
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* @param tls_slots The TLS page array of the thread's owner process.
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* Returns a tuple of (page, slot, alloc_needed) where:
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* page: The index of the first allocated TLS page that has free slots.
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* slot: The index of the first free slot in the indicated page.
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* alloc_needed: Whether there's a need to allocate a new TLS page (All pages are full).
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*/
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static std::tuple<std::size_t, std::size_t, bool> FindFreeThreadLocalSlot(
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const std::vector<std::bitset<8>>& tls_slots) {
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// Iterate over all the allocated pages, and try to find one where not all slots are used.
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for (std::size_t page = 0; page < tls_slots.size(); ++page) {
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const auto& page_tls_slots = tls_slots[page];
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if (!page_tls_slots.all()) {
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// We found a page with at least one free slot, find which slot it is
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for (std::size_t slot = 0; slot < page_tls_slots.size(); ++slot) {
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if (!page_tls_slots.test(slot)) {
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return std::make_tuple(page, slot, false);
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}
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}
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}
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}
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return std::make_tuple(0, 0, true);
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}
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VAddr Process::MarkNextAvailableTLSSlotAsUsed(Thread& thread) {
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auto [available_page, available_slot, needs_allocation] = FindFreeThreadLocalSlot(tls_slots);
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const VAddr tls_begin = vm_manager.GetTLSIORegionBaseAddress();
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if (needs_allocation) {
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tls_slots.emplace_back(0); // The page is completely available at the start
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available_page = tls_slots.size() - 1;
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available_slot = 0; // Use the first slot in the new page
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// Allocate some memory from the end of the linear heap for this region.
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auto& tls_memory = thread.GetTLSMemory();
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tls_memory->insert(tls_memory->end(), Memory::PAGE_SIZE, 0);
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vm_manager.RefreshMemoryBlockMappings(tls_memory.get());
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vm_manager.MapMemoryBlock(tls_begin + available_page * Memory::PAGE_SIZE, tls_memory, 0,
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Memory::PAGE_SIZE, MemoryState::ThreadLocal);
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}
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tls_slots[available_page].set(available_slot);
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return tls_begin + available_page * Memory::PAGE_SIZE + available_slot * Memory::TLS_ENTRY_SIZE;
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}
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void Process::FreeTLSSlot(VAddr tls_address) {
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const VAddr tls_base = tls_address - vm_manager.GetTLSIORegionBaseAddress();
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const VAddr tls_page = tls_base / Memory::PAGE_SIZE;
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const VAddr tls_slot = (tls_base % Memory::PAGE_SIZE) / Memory::TLS_ENTRY_SIZE;
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tls_slots[tls_page].reset(tls_slot);
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}
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void Process::LoadModule(CodeSet module_, VAddr base_addr) {
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const auto memory = std::make_shared<std::vector<u8>>(std::move(module_.memory));
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const auto MapSegment = [&](const CodeSet::Segment& segment, VMAPermission permissions,
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MemoryState memory_state) {
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const auto vma = vm_manager
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.MapMemoryBlock(segment.addr + base_addr, memory, segment.offset,
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segment.size, memory_state)
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.Unwrap();
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vm_manager.Reprotect(vma, permissions);
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};
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// Map CodeSet segments
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MapSegment(module_.CodeSegment(), VMAPermission::ReadExecute, MemoryState::Code);
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MapSegment(module_.RODataSegment(), VMAPermission::Read, MemoryState::CodeData);
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MapSegment(module_.DataSegment(), VMAPermission::ReadWrite, MemoryState::CodeData);
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code_memory_size += module_.memory.size();
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// Clear instruction cache in CPU JIT
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system.InvalidateCpuInstructionCaches();
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}
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Process::Process(Core::System& system)
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: WaitObject{system.Kernel()}, address_arbiter{system}, mutex{system}, system{system} {}
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Process::~Process() = default;
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void Process::Acquire(Thread* thread) {
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ASSERT_MSG(!ShouldWait(thread), "Object unavailable!");
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}
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bool Process::ShouldWait(const Thread* thread) const {
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return !is_signaled;
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}
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void Process::ChangeStatus(ProcessStatus new_status) {
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if (status == new_status) {
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return;
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}
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status = new_status;
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is_signaled = true;
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WakeupAllWaitingThreads();
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}
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} // namespace Kernel
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