From acfc801d14b1883f54b8fe66ac428982f9898258 Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Fri, 21 Sep 2018 01:26:29 -0400
Subject: [PATCH] thread/process: Move TLS slot marking/freeing to the process
class
Allows making several members of the process class private, it also
avoids going through Core::CurrentProcess() just to retrieve the owning
process.
---
src/core/hle/kernel/process.cpp | 58 +++++++++++++++++++++++++++++++++
src/core/hle/kernel/process.h | 28 +++++++++-------
src/core/hle/kernel/thread.cpp | 58 ++-------------------------------
src/core/hle/kernel/thread.h | 13 +++++++-
4 files changed, 89 insertions(+), 68 deletions(-)
diff --git a/src/core/hle/kernel/process.cpp b/src/core/hle/kernel/process.cpp
index 914bbe0a17..0c8ea94fcc 100644
--- a/src/core/hle/kernel/process.cpp
+++ b/src/core/hle/kernel/process.cpp
@@ -128,6 +128,64 @@ void Process::Run(VAddr entry_point, s32 main_thread_priority, u32 stack_size) {
Kernel::SetupMainThread(kernel, entry_point, main_thread_priority, *this);
}
+/**
+ * Finds a free location for the TLS section of a thread.
+ * @param tls_slots The TLS page array of the thread's owner process.
+ * Returns a tuple of (page, slot, alloc_needed) where:
+ * page: The index of the first allocated TLS page that has free slots.
+ * slot: The index of the first free slot in the indicated page.
+ * alloc_needed: Whether there's a need to allocate a new TLS page (All pages are full).
+ */
+static std::tuple<std::size_t, std::size_t, bool> FindFreeThreadLocalSlot(
+ const std::vector<std::bitset<8>>& tls_slots) {
+ // Iterate over all the allocated pages, and try to find one where not all slots are used.
+ for (std::size_t page = 0; page < tls_slots.size(); ++page) {
+ const auto& page_tls_slots = tls_slots[page];
+ if (!page_tls_slots.all()) {
+ // We found a page with at least one free slot, find which slot it is
+ for (std::size_t slot = 0; slot < page_tls_slots.size(); ++slot) {
+ if (!page_tls_slots.test(slot)) {
+ return std::make_tuple(page, slot, false);
+ }
+ }
+ }
+ }
+
+ return std::make_tuple(0, 0, true);
+}
+
+VAddr Process::MarkNextAvailableTLSSlotAsUsed(Thread& thread) {
+ auto [available_page, available_slot, needs_allocation] = FindFreeThreadLocalSlot(tls_slots);
+
+ if (needs_allocation) {
+ tls_slots.emplace_back(0); // The page is completely available at the start
+ available_page = tls_slots.size() - 1;
+ available_slot = 0; // Use the first slot in the new page
+
+ // Allocate some memory from the end of the linear heap for this region.
+ auto& tls_memory = thread.GetTLSMemory();
+ tls_memory->insert(tls_memory->end(), Memory::PAGE_SIZE, 0);
+
+ vm_manager.RefreshMemoryBlockMappings(tls_memory.get());
+
+ vm_manager.MapMemoryBlock(Memory::TLS_AREA_VADDR + available_page * Memory::PAGE_SIZE,
+ tls_memory, 0, Memory::PAGE_SIZE, MemoryState::ThreadLocal);
+ }
+
+ tls_slots[available_page].set(available_slot);
+
+ return Memory::TLS_AREA_VADDR + available_page * Memory::PAGE_SIZE +
+ available_slot * Memory::TLS_ENTRY_SIZE;
+}
+
+void Process::FreeTLSSlot(VAddr tls_address) {
+ const VAddr tls_base = tls_address - Memory::TLS_AREA_VADDR;
+ const VAddr tls_page = tls_base / Memory::PAGE_SIZE;
+ const VAddr tls_slot = (tls_base % Memory::PAGE_SIZE) / Memory::TLS_ENTRY_SIZE;
+
+ tls_slots[tls_page].reset(tls_slot);
+}
+
void Process::LoadModule(SharedPtr<CodeSet> module_, VAddr base_addr) {
const auto MapSegment = [&](CodeSet::Segment& segment, VMAPermission permissions,
MemoryState memory_state) {
diff --git a/src/core/hle/kernel/process.h b/src/core/hle/kernel/process.h
index 81538f70c6..84027a31a9 100644
--- a/src/core/hle/kernel/process.h
+++ b/src/core/hle/kernel/process.h
@@ -176,8 +176,25 @@ public:
///////////////////////////////////////////////////////////////////////////////////////////////
// Memory Management
+ // Marks the next available region as used and returns the address of the slot.
+ VAddr MarkNextAvailableTLSSlotAsUsed(Thread& thread);
+
+ // Frees a used TLS slot identified by the given address
+ void FreeTLSSlot(VAddr tls_address);
+
+ ResultVal<VAddr> HeapAllocate(VAddr target, u64 size, VMAPermission perms);
+ ResultCode HeapFree(VAddr target, u32 size);
+
+ ResultCode MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size);
+
+ ResultCode UnmapMemory(VAddr dst_addr, VAddr src_addr, u64 size);
+
VMManager vm_manager;
+private:
+ explicit Process(KernelCore& kernel);
+ ~Process() override;
+
// Memory used to back the allocations in the regular heap. A single vector is used to cover
// the entire virtual address space extents that bound the allocations, including any holes.
// This makes deallocation and reallocation of holes fast and keeps process memory contiguous
@@ -197,17 +214,6 @@ public:
std::vector<std::bitset<8>> tls_slots;
std::string name;
-
- ResultVal<VAddr> HeapAllocate(VAddr target, u64 size, VMAPermission perms);
- ResultCode HeapFree(VAddr target, u32 size);
-
- ResultCode MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size);
-
- ResultCode UnmapMemory(VAddr dst_addr, VAddr src_addr, u64 size);
-
-private:
- explicit Process(KernelCore& kernel);
- ~Process() override;
};
} // namespace Kernel
diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp
index c2d7535c92..315f653385 100644
--- a/src/core/hle/kernel/thread.cpp
+++ b/src/core/hle/kernel/thread.cpp
@@ -65,10 +65,7 @@ void Thread::Stop() {
wait_objects.clear();
// Mark the TLS slot in the thread's page as free.
- const u64 tls_page = (tls_address - Memory::TLS_AREA_VADDR) / Memory::PAGE_SIZE;
- const u64 tls_slot =
- ((tls_address - Memory::TLS_AREA_VADDR) % Memory::PAGE_SIZE) / Memory::TLS_ENTRY_SIZE;
- Core::CurrentProcess()->tls_slots[tls_page].reset(tls_slot);
+ owner_process->FreeTLSSlot(tls_address);
}
void WaitCurrentThread_Sleep() {
@@ -177,32 +174,6 @@ void Thread::ResumeFromWait() {
Core::System::GetInstance().CpuCore(processor_id).PrepareReschedule();
}
-/**
- * Finds a free location for the TLS section of a thread.
- * @param tls_slots The TLS page array of the thread's owner process.
- * Returns a tuple of (page, slot, alloc_needed) where:
- * page: The index of the first allocated TLS page that has free slots.
- * slot: The index of the first free slot in the indicated page.
- * alloc_needed: Whether there's a need to allocate a new TLS page (All pages are full).
- */
-static std::tuple<std::size_t, std::size_t, bool> GetFreeThreadLocalSlot(
- const std::vector<std::bitset<8>>& tls_slots) {
- // Iterate over all the allocated pages, and try to find one where not all slots are used.
- for (std::size_t page = 0; page < tls_slots.size(); ++page) {
- const auto& page_tls_slots = tls_slots[page];
- if (!page_tls_slots.all()) {
- // We found a page with at least one free slot, find which slot it is
- for (std::size_t slot = 0; slot < page_tls_slots.size(); ++slot) {
- if (!page_tls_slots.test(slot)) {
- return std::make_tuple(page, slot, false);
- }
- }
- }
- }
-
- return std::make_tuple(0, 0, true);
-}
-
/**
* Resets a thread context, making it ready to be scheduled and run by the CPU
* @param context Thread context to reset
@@ -264,32 +235,7 @@ ResultVal<SharedPtr<Thread>> Thread::Create(KernelCore& kernel, std::string name
thread->owner_process = owner_process;
thread->scheduler = Core::System::GetInstance().Scheduler(processor_id);
thread->scheduler->AddThread(thread, priority);
-
- // Find the next available TLS index, and mark it as used
- auto& tls_slots = owner_process->tls_slots;
-
- auto [available_page, available_slot, needs_allocation] = GetFreeThreadLocalSlot(tls_slots);
- if (needs_allocation) {
- tls_slots.emplace_back(0); // The page is completely available at the start
- available_page = tls_slots.size() - 1;
- available_slot = 0; // Use the first slot in the new page
-
- // Allocate some memory from the end of the linear heap for this region.
- const std::size_t offset = thread->tls_memory->size();
- thread->tls_memory->insert(thread->tls_memory->end(), Memory::PAGE_SIZE, 0);
-
- auto& vm_manager = owner_process->vm_manager;
- vm_manager.RefreshMemoryBlockMappings(thread->tls_memory.get());
-
- vm_manager.MapMemoryBlock(Memory::TLS_AREA_VADDR + available_page * Memory::PAGE_SIZE,
- thread->tls_memory, 0, Memory::PAGE_SIZE,
- MemoryState::ThreadLocal);
- }
-
- // Mark the slot as used
- tls_slots[available_page].set(available_slot);
- thread->tls_address = Memory::TLS_AREA_VADDR + available_page * Memory::PAGE_SIZE +
- available_slot * Memory::TLS_ENTRY_SIZE;
+ thread->tls_address = thread->owner_process->MarkNextAvailableTLSSlotAsUsed(*thread);
// TODO(peachum): move to ScheduleThread() when scheduler is added so selected core is used
// to initialize the context
diff --git a/src/core/hle/kernel/thread.h b/src/core/hle/kernel/thread.h
index 91e9b79ecb..4250144c31 100644
--- a/src/core/hle/kernel/thread.h
+++ b/src/core/hle/kernel/thread.h
@@ -62,6 +62,9 @@ enum class ThreadWakeupReason {
class Thread final : public WaitObject {
public:
+ using TLSMemory = std::vector<u8>;
+ using TLSMemoryPtr = std::shared_ptr<TLSMemory>;
+
/**
* Creates and returns a new thread. The new thread is immediately scheduled
* @param kernel The kernel instance this thread will be created under.
@@ -134,6 +137,14 @@ public:
return thread_id;
}
+ TLSMemoryPtr& GetTLSMemory() {
+ return tls_memory;
+ }
+
+ const TLSMemoryPtr& GetTLSMemory() const {
+ return tls_memory;
+ }
+
/**
* Resumes a thread from waiting
*/
@@ -269,7 +280,7 @@ private:
explicit Thread(KernelCore& kernel);
~Thread() override;
- std::shared_ptr<std::vector<u8>> tls_memory = std::make_shared<std::vector<u8>>();
+ TLSMemoryPtr tls_memory = std::make_shared<TLSMemory>();
};
/**