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-rw-r--r--src/core/hle/kernel/memory.cpp1
-rw-r--r--src/core/hle/kernel/process.h7
-rw-r--r--src/core/hle/kernel/thread.cpp84
-rw-r--r--src/core/hle/kernel/thread.h4
-rw-r--r--src/core/memory.h6
5 files changed, 74 insertions, 28 deletions
diff --git a/src/core/hle/kernel/memory.cpp b/src/core/hle/kernel/memory.cpp
index 862643448..61a741e28 100644
--- a/src/core/hle/kernel/memory.cpp
+++ b/src/core/hle/kernel/memory.cpp
@@ -109,7 +109,6 @@ struct MemoryArea {
static MemoryArea memory_areas[] = {
{SHARED_MEMORY_VADDR, SHARED_MEMORY_SIZE, "Shared Memory"}, // Shared memory
{VRAM_VADDR, VRAM_SIZE, "VRAM"}, // Video memory (VRAM)
- {TLS_AREA_VADDR, TLS_AREA_SIZE, "TLS Area"}, // TLS memory
};
}
diff --git a/src/core/hle/kernel/process.h b/src/core/hle/kernel/process.h
index a06afef2b..d781ef32c 100644
--- a/src/core/hle/kernel/process.h
+++ b/src/core/hle/kernel/process.h
@@ -142,8 +142,11 @@ public:
MemoryRegionInfo* memory_region = nullptr;
- /// Bitmask of the used TLS slots
- std::bitset<300> used_tls_slots;
+ /// The Thread Local Storage area is allocated as processes create threads,
+ /// each TLS area is 0x200 bytes, so one page (0x1000) is split up in 8 parts, and each part
+ /// holds the TLS for a specific thread. This vector contains which parts are in use for each page as a bitmask.
+ /// This vector will grow as more pages are allocated for new threads.
+ std::vector<std::bitset<8>> tls_slots;
VAddr GetLinearHeapAreaAddress() const;
VAddr GetLinearHeapBase() const;
diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp
index 6dc95d0f1..68f026918 100644
--- a/src/core/hle/kernel/thread.cpp
+++ b/src/core/hle/kernel/thread.cpp
@@ -117,9 +117,10 @@ void Thread::Stop() {
}
wait_objects.clear();
- Kernel::g_current_process->used_tls_slots[tls_index] = false;
- g_current_process->misc_memory_used -= Memory::TLS_ENTRY_SIZE;
- g_current_process->memory_region->used -= Memory::TLS_ENTRY_SIZE;
+ // Mark the TLS slot in the thread's page as free.
+ u32 tls_page = (tls_address - Memory::TLS_AREA_VADDR) / Memory::PAGE_SIZE;
+ u32 tls_slot = ((tls_address - Memory::TLS_AREA_VADDR) % Memory::PAGE_SIZE) / Memory::TLS_ENTRY_SIZE;
+ Kernel::g_current_process->tls_slots[tls_page].reset(tls_slot);
HLE::Reschedule(__func__);
}
@@ -366,6 +367,31 @@ static void DebugThreadQueue() {
}
}
+/**
+ * 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).
+ */
+std::tuple<u32, u32, bool> GetFreeThreadLocalSlot(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 (unsigned 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 (unsigned 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);
+}
+
ResultVal<SharedPtr<Thread>> Thread::Create(std::string name, VAddr entry_point, s32 priority,
u32 arg, s32 processor_id, VAddr stack_top) {
if (priority < THREADPRIO_HIGHEST || priority > THREADPRIO_LOWEST) {
@@ -403,22 +429,50 @@ ResultVal<SharedPtr<Thread>> Thread::Create(std::string name, VAddr entry_point,
thread->name = std::move(name);
thread->callback_handle = wakeup_callback_handle_table.Create(thread).MoveFrom();
thread->owner_process = g_current_process;
- thread->tls_index = -1;
thread->waitsynch_waited = false;
// Find the next available TLS index, and mark it as used
- auto& used_tls_slots = Kernel::g_current_process->used_tls_slots;
- for (unsigned int i = 0; i < used_tls_slots.size(); ++i) {
- if (used_tls_slots[i] == false) {
- thread->tls_index = i;
- used_tls_slots[i] = true;
- break;
+ auto& tls_slots = Kernel::g_current_process->tls_slots;
+ bool needs_allocation = true;
+ u32 available_page; // Which allocated page has free space
+ u32 available_slot; // Which slot within the page is free
+
+ std::tie(available_page, available_slot, needs_allocation) = GetFreeThreadLocalSlot(tls_slots);
+
+ if (needs_allocation) {
+ // There are no already-allocated pages with free slots, lets allocate a new one.
+ // TLS pages are allocated from the BASE region in the linear heap.
+ MemoryRegionInfo* memory_region = GetMemoryRegion(MemoryRegion::BASE);
+ auto& linheap_memory = memory_region->linear_heap_memory;
+
+ if (linheap_memory->size() + Memory::PAGE_SIZE > memory_region->size) {
+ LOG_ERROR(Kernel_SVC, "Not enough space in region to allocate a new TLS page for thread");
+ return ResultCode(ErrorDescription::OutOfMemory, ErrorModule::Kernel, ErrorSummary::OutOfResource, ErrorLevel::Permanent);
}
+
+ u32 offset = linheap_memory->size();
+
+ // Allocate some memory from the end of the linear heap for this region.
+ linheap_memory->insert(linheap_memory->end(), Memory::PAGE_SIZE, 0);
+ memory_region->used += Memory::PAGE_SIZE;
+ Kernel::g_current_process->linear_heap_used += Memory::PAGE_SIZE;
+
+ 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
+
+ auto& vm_manager = Kernel::g_current_process->vm_manager;
+ vm_manager.RefreshMemoryBlockMappings(linheap_memory.get());
+
+ // Map the page to the current process' address space.
+ // TODO(Subv): Find the correct MemoryState for this region.
+ vm_manager.MapMemoryBlock(Memory::TLS_AREA_VADDR + available_page * Memory::PAGE_SIZE,
+ linheap_memory, offset, Memory::PAGE_SIZE, MemoryState::Private);
}
- ASSERT_MSG(thread->tls_index != -1, "Out of TLS space");
- g_current_process->misc_memory_used += Memory::TLS_ENTRY_SIZE;
- g_current_process->memory_region->used += Memory::TLS_ENTRY_SIZE;
+ // 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;
// TODO(peachum): move to ScheduleThread() when scheduler is added so selected core is used
// to initialize the context
@@ -509,10 +563,6 @@ void Thread::SetWaitSynchronizationOutput(s32 output) {
context.cpu_registers[1] = output;
}
-VAddr Thread::GetTLSAddress() const {
- return Memory::TLS_AREA_VADDR + tls_index * Memory::TLS_ENTRY_SIZE;
-}
-
////////////////////////////////////////////////////////////////////////////////////////////////////
void ThreadingInit() {
diff --git a/src/core/hle/kernel/thread.h b/src/core/hle/kernel/thread.h
index 97ba57fc5..deab5d5a6 100644
--- a/src/core/hle/kernel/thread.h
+++ b/src/core/hle/kernel/thread.h
@@ -127,7 +127,7 @@ public:
* Returns the Thread Local Storage address of the current thread
* @returns VAddr of the thread's TLS
*/
- VAddr GetTLSAddress() const;
+ VAddr GetTLSAddress() const { return tls_address; }
Core::ThreadContext context;
@@ -144,7 +144,7 @@ public:
s32 processor_id;
- s32 tls_index; ///< Index of the Thread Local Storage of the thread
+ VAddr tls_address; ///< Virtual address of the Thread Local Storage of the thread
bool waitsynch_waited; ///< Set to true if the last svcWaitSynch call caused the thread to wait
diff --git a/src/core/memory.h b/src/core/memory.h
index 9caa3c3f5..126d60471 100644
--- a/src/core/memory.h
+++ b/src/core/memory.h
@@ -100,15 +100,9 @@ enum : VAddr {
SHARED_PAGE_SIZE = 0x00001000,
SHARED_PAGE_VADDR_END = SHARED_PAGE_VADDR + SHARED_PAGE_SIZE,
- // TODO(yuriks): The size of this area is dynamic, the kernel grows
- // it as more and more threads are created. For now we'll just use a
- // hardcoded value.
/// Area where TLS (Thread-Local Storage) buffers are allocated.
TLS_AREA_VADDR = 0x1FF82000,
TLS_ENTRY_SIZE = 0x200,
- TLS_AREA_SIZE = 300 * TLS_ENTRY_SIZE + 0x800, // Space for up to 300 threads + round to page size
- TLS_AREA_VADDR_END = TLS_AREA_VADDR + TLS_AREA_SIZE,
-
/// Equivalent to LINEAR_HEAP_VADDR, but expanded to cover the extra memory in the New 3DS.
NEW_LINEAR_HEAP_VADDR = 0x30000000,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 04:52:42 +0100