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-rw-r--r--src/core/hle/kernel/process.cpp120
-rw-r--r--src/core/hle/kernel/process.h31
-rw-r--r--src/core/hle/kernel/vm_manager.cpp91
-rw-r--r--src/core/hle/kernel/vm_manager.h24
4 files changed, 243 insertions, 23 deletions
diff --git a/src/core/hle/kernel/process.cpp b/src/core/hle/kernel/process.cpp
index ad953cdbf..1db763999 100644
--- a/src/core/hle/kernel/process.cpp
+++ b/src/core/hle/kernel/process.cpp
@@ -36,8 +36,7 @@ SharedPtr<Process> Process::Create(SharedPtr<CodeSet> code_set) {
process->codeset = std::move(code_set);
process->flags.raw = 0;
process->flags.memory_region = MemoryRegion::APPLICATION;
- process->address_space = Common::make_unique<VMManager>();
- Memory::InitLegacyAddressSpace(*process->address_space);
+ Memory::InitLegacyAddressSpace(process->vm_manager);
return process;
}
@@ -104,19 +103,130 @@ void Process::ParseKernelCaps(const u32* kernel_caps, size_t len) {
void Process::Run(s32 main_thread_priority, u32 stack_size) {
auto MapSegment = [&](CodeSet::Segment& segment, VMAPermission permissions, MemoryState memory_state) {
- auto vma = address_space->MapMemoryBlock(segment.addr, codeset->memory,
+ auto vma = vm_manager.MapMemoryBlock(segment.addr, codeset->memory,
segment.offset, segment.size, memory_state).Unwrap();
- address_space->Reprotect(vma, permissions);
+ vm_manager.Reprotect(vma, permissions);
};
+ // Map CodeSet segments
MapSegment(codeset->code, VMAPermission::ReadExecute, MemoryState::Code);
MapSegment(codeset->rodata, VMAPermission::Read, MemoryState::Code);
MapSegment(codeset->data, VMAPermission::ReadWrite, MemoryState::Private);
- address_space->LogLayout(Log::Level::Debug);
+ // Allocate and map stack
+ vm_manager.MapMemoryBlock(Memory::HEAP_VADDR_END - stack_size,
+ std::make_shared<std::vector<u8>>(stack_size, 0), 0, stack_size, MemoryState::Locked
+ ).Unwrap();
+
+ vm_manager.LogLayout(Log::Level::Debug);
Kernel::SetupMainThread(codeset->entrypoint, main_thread_priority);
}
+ResultVal<VAddr> Process::HeapAllocate(VAddr target, u32 size, VMAPermission perms) {
+ if (target < Memory::HEAP_VADDR || target + size > Memory::HEAP_VADDR_END || target + size < target) {
+ return ERR_INVALID_ADDRESS;
+ }
+
+ if (heap_memory == nullptr) {
+ // Initialize heap
+ heap_memory = std::make_shared<std::vector<u8>>();
+ heap_start = heap_end = target;
+ }
+
+ // If necessary, expand backing vector to cover new heap extents.
+ if (target < heap_start) {
+ heap_memory->insert(begin(*heap_memory), heap_start - target, 0);
+ heap_start = target;
+ vm_manager.RefreshMemoryBlockMappings(heap_memory.get());
+ }
+ if (target + size > heap_end) {
+ heap_memory->insert(end(*heap_memory), (target + size) - heap_end, 0);
+ heap_end = target + size;
+ vm_manager.RefreshMemoryBlockMappings(heap_memory.get());
+ }
+ ASSERT(heap_end - heap_start == heap_memory->size());
+
+ CASCADE_RESULT(auto vma, vm_manager.MapMemoryBlock(target, heap_memory, target - heap_start, size, MemoryState::Private));
+ vm_manager.Reprotect(vma, perms);
+
+ return MakeResult<VAddr>(heap_end - size);
+}
+
+ResultCode Process::HeapFree(VAddr target, u32 size) {
+ if (target < Memory::HEAP_VADDR || target + size > Memory::HEAP_VADDR_END || target + size < target) {
+ return ERR_INVALID_ADDRESS;
+ }
+
+ ResultCode result = vm_manager.UnmapRange(target, size);
+ if (result.IsError()) return result;
+
+ return RESULT_SUCCESS;
+}
+
+ResultVal<VAddr> Process::LinearAllocate(VAddr target, u32 size, VMAPermission perms) {
+ if (linear_heap_memory == nullptr) {
+ // Initialize heap
+ linear_heap_memory = std::make_shared<std::vector<u8>>();
+ }
+
+ VAddr heap_end = Memory::LINEAR_HEAP_VADDR + (u32)linear_heap_memory->size();
+ // Games and homebrew only ever seem to pass 0 here (which lets the kernel decide the address),
+ // but explicit addresses are also accepted and respected.
+ if (target == 0) {
+ target = heap_end;
+ }
+
+ if (target < Memory::LINEAR_HEAP_VADDR || target + size > Memory::LINEAR_HEAP_VADDR_END ||
+ target > heap_end || target + size < target) {
+
+ return ERR_INVALID_ADDRESS;
+ }
+
+ // Expansion of the linear heap is only allowed if you do an allocation immediatelly at its
+ // end. It's possible to free gaps in the middle of the heap and then reallocate them later,
+ // but expansions are only allowed at the end.
+ if (target == heap_end) {
+ linear_heap_memory->insert(linear_heap_memory->end(), size, 0);
+ vm_manager.RefreshMemoryBlockMappings(linear_heap_memory.get());
+ }
+
+ size_t offset = target - Memory::LINEAR_HEAP_VADDR;
+ CASCADE_RESULT(auto vma, vm_manager.MapMemoryBlock(target, linear_heap_memory, offset, size, MemoryState::Continuous));
+ vm_manager.Reprotect(vma, perms);
+
+ return MakeResult<VAddr>(target);
+}
+
+ResultCode Process::LinearFree(VAddr target, u32 size) {
+ if (linear_heap_memory == nullptr || target < Memory::LINEAR_HEAP_VADDR ||
+ target + size > Memory::LINEAR_HEAP_VADDR_END || target + size < target) {
+
+ return ERR_INVALID_ADDRESS;
+ }
+
+ VAddr heap_end = Memory::LINEAR_HEAP_VADDR + (u32)linear_heap_memory->size();
+ if (target + size > heap_end) {
+ return ERR_INVALID_ADDRESS_STATE;
+ }
+
+ ResultCode result = vm_manager.UnmapRange(target, size);
+ if (result.IsError()) return result;
+
+ if (target + size == heap_end) {
+ // End of linear heap has been freed, so check what's the last allocated block in it and
+ // reduce the size.
+ auto vma = vm_manager.FindVMA(target);
+ ASSERT(vma != vm_manager.vma_map.end());
+ ASSERT(vma->second.type == VMAType::Free);
+ VAddr new_end = vma->second.base;
+ if (new_end >= Memory::LINEAR_HEAP_VADDR) {
+ linear_heap_memory->resize(new_end - Memory::LINEAR_HEAP_VADDR);
+ }
+ }
+
+ return RESULT_SUCCESS;
+}
+
Kernel::Process::Process() {}
Kernel::Process::~Process() {}
diff --git a/src/core/hle/kernel/process.h b/src/core/hle/kernel/process.h
index 83d3aceae..567d5df18 100644
--- a/src/core/hle/kernel/process.h
+++ b/src/core/hle/kernel/process.h
@@ -15,6 +15,7 @@
#include "common/common_types.h"
#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/vm_manager.h"
namespace Kernel {
@@ -48,7 +49,6 @@ union ProcessFlags {
};
class ResourceLimit;
-class VMManager;
struct CodeSet final : public Object {
static SharedPtr<CodeSet> Create(std::string name, u64 program_id);
@@ -108,10 +108,6 @@ public:
/// The id of this process
u32 process_id = next_process_id++;
- /// Bitmask of the used TLS slots
- std::bitset<300> used_tls_slots;
- std::unique_ptr<VMManager> address_space;
-
/**
* Parses a list of kernel capability descriptors (as found in the ExHeader) and applies them
* to this process.
@@ -123,6 +119,31 @@ public:
*/
void Run(s32 main_thread_priority, u32 stack_size);
+
+ ///////////////////////////////////////////////////////////////////////////////////////////////
+ // Memory Management
+
+ VMManager vm_manager;
+
+ // 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
+ // in the emulator address space, allowing Memory::GetPointer to be reasonably safe.
+ std::shared_ptr<std::vector<u8>> heap_memory;
+ // The left/right bounds of the address space covered by heap_memory.
+ VAddr heap_start = 0, heap_end = 0;
+
+ std::shared_ptr<std::vector<u8>> linear_heap_memory;
+
+ /// Bitmask of the used TLS slots
+ std::bitset<300> used_tls_slots;
+
+ ResultVal<VAddr> HeapAllocate(VAddr target, u32 size, VMAPermission perms);
+ ResultCode HeapFree(VAddr target, u32 size);
+
+ ResultVal<VAddr> LinearAllocate(VAddr target, u32 size, VMAPermission perms);
+ ResultCode LinearFree(VAddr target, u32 size);
+
private:
Process();
~Process() override;
diff --git a/src/core/hle/kernel/vm_manager.cpp b/src/core/hle/kernel/vm_manager.cpp
index 65395476b..2610acf76 100644
--- a/src/core/hle/kernel/vm_manager.cpp
+++ b/src/core/hle/kernel/vm_manager.cpp
@@ -60,7 +60,11 @@ void VMManager::Reset() {
}
VMManager::VMAHandle VMManager::FindVMA(VAddr target) const {
- return std::prev(vma_map.upper_bound(target));
+ if (target >= MAX_ADDRESS) {
+ return vma_map.end();
+ } else {
+ return std::prev(vma_map.upper_bound(target));
+ }
}
ResultVal<VMManager::VMAHandle> VMManager::MapMemoryBlock(VAddr target,
@@ -115,10 +119,8 @@ ResultVal<VMManager::VMAHandle> VMManager::MapMMIO(VAddr target, PAddr paddr, u3
return MakeResult<VMAHandle>(MergeAdjacent(vma_handle));
}
-void VMManager::Unmap(VMAHandle vma_handle) {
- VMAIter iter = StripIterConstness(vma_handle);
-
- VirtualMemoryArea& vma = iter->second;
+VMManager::VMAIter VMManager::Unmap(VMAIter vma_handle) {
+ VirtualMemoryArea& vma = vma_handle->second;
vma.type = VMAType::Free;
vma.permissions = VMAPermission::None;
vma.meminfo_state = MemoryState::Free;
@@ -130,17 +132,57 @@ void VMManager::Unmap(VMAHandle vma_handle) {
UpdatePageTableForVMA(vma);
- MergeAdjacent(iter);
+ return MergeAdjacent(vma_handle);
+}
+
+ResultCode VMManager::UnmapRange(VAddr target, u32 size) {
+ CASCADE_RESULT(VMAIter vma, CarveVMARange(target, size));
+ VAddr target_end = target + size;
+
+ VMAIter end = vma_map.end();
+ // The comparison against the end of the range must be done using addresses since VMAs can be
+ // merged during this process, causing invalidation of the iterators.
+ while (vma != end && vma->second.base < target_end) {
+ vma = std::next(Unmap(vma));
+ }
+
+ ASSERT(FindVMA(target)->second.size >= size);
+ return RESULT_SUCCESS;
}
-void VMManager::Reprotect(VMAHandle vma_handle, VMAPermission new_perms) {
+VMManager::VMAHandle VMManager::Reprotect(VMAHandle vma_handle, VMAPermission new_perms) {
VMAIter iter = StripIterConstness(vma_handle);
VirtualMemoryArea& vma = iter->second;
vma.permissions = new_perms;
UpdatePageTableForVMA(vma);
- MergeAdjacent(iter);
+ return MergeAdjacent(iter);
+}
+
+ResultCode VMManager::ReprotectRange(VAddr target, u32 size, VMAPermission new_perms) {
+ CASCADE_RESULT(VMAIter vma, CarveVMARange(target, size));
+ VAddr target_end = target + size;
+
+ VMAIter end = vma_map.end();
+ // The comparison against the end of the range must be done using addresses since VMAs can be
+ // merged during this process, causing invalidation of the iterators.
+ while (vma != end && vma->second.base < target_end) {
+ vma = std::next(StripIterConstness(Reprotect(vma, new_perms)));
+ }
+
+ return RESULT_SUCCESS;
+}
+
+void VMManager::RefreshMemoryBlockMappings(const std::vector<u8>* block) {
+ // If this ever proves to have a noticeable performance impact, allow users of the function to
+ // specify a specific range of addresses to limit the scan to.
+ for (const auto& p : vma_map) {
+ const VirtualMemoryArea& vma = p.second;
+ if (block == vma.backing_block.get()) {
+ UpdatePageTableForVMA(vma);
+ }
+ }
}
void VMManager::LogLayout(Log::Level log_level) const {
@@ -161,8 +203,8 @@ VMManager::VMAIter VMManager::StripIterConstness(const VMAHandle & iter) {
}
ResultVal<VMManager::VMAIter> VMManager::CarveVMA(VAddr base, u32 size) {
- ASSERT_MSG((size & Memory::PAGE_MASK) == 0, "non-page aligned size: %8X", size);
- ASSERT_MSG((base & Memory::PAGE_MASK) == 0, "non-page aligned base: %08X", base);
+ ASSERT_MSG((size & Memory::PAGE_MASK) == 0, "non-page aligned size: 0x%8X", size);
+ ASSERT_MSG((base & Memory::PAGE_MASK) == 0, "non-page aligned base: 0x%08X", base);
VMAIter vma_handle = StripIterConstness(FindVMA(base));
if (vma_handle == vma_map.end()) {
@@ -196,6 +238,35 @@ ResultVal<VMManager::VMAIter> VMManager::CarveVMA(VAddr base, u32 size) {
return MakeResult<VMAIter>(vma_handle);
}
+ResultVal<VMManager::VMAIter> VMManager::CarveVMARange(VAddr target, u32 size) {
+ ASSERT_MSG((size & Memory::PAGE_MASK) == 0, "non-page aligned size: 0x%8X", size);
+ ASSERT_MSG((target & Memory::PAGE_MASK) == 0, "non-page aligned base: 0x%08X", target);
+
+ VAddr target_end = target + size;
+ ASSERT(target_end >= target);
+ ASSERT(target_end <= MAX_ADDRESS);
+ ASSERT(size > 0);
+
+ VMAIter begin_vma = StripIterConstness(FindVMA(target));
+ VMAIter i_end = vma_map.lower_bound(target_end);
+ for (auto i = begin_vma; i != i_end; ++i) {
+ if (i->second.type == VMAType::Free) {
+ return ERR_INVALID_ADDRESS_STATE;
+ }
+ }
+
+ if (target != begin_vma->second.base) {
+ begin_vma = SplitVMA(begin_vma, target - begin_vma->second.base);
+ }
+
+ VMAIter end_vma = StripIterConstness(FindVMA(target_end));
+ if (end_vma != vma_map.end() && target_end != end_vma->second.base) {
+ end_vma = SplitVMA(end_vma, target_end - end_vma->second.base);
+ }
+
+ return MakeResult<VMAIter>(begin_vma);
+}
+
VMManager::VMAIter VMManager::SplitVMA(VMAIter vma_handle, u32 offset_in_vma) {
VirtualMemoryArea& old_vma = vma_handle->second;
VirtualMemoryArea new_vma = old_vma; // Make a copy of the VMA
diff --git a/src/core/hle/kernel/vm_manager.h b/src/core/hle/kernel/vm_manager.h
index 15c10e413..4e95f1f0c 100644
--- a/src/core/hle/kernel/vm_manager.h
+++ b/src/core/hle/kernel/vm_manager.h
@@ -171,11 +171,20 @@ public:
*/
ResultVal<VMAHandle> MapMMIO(VAddr target, PAddr paddr, u32 size, MemoryState state);
- /// Unmaps the given VMA.
- void Unmap(VMAHandle vma);
+ /// Unmaps a range of addresses, splitting VMAs as necessary.
+ ResultCode UnmapRange(VAddr target, u32 size);
/// Changes the permissions of the given VMA.
- void Reprotect(VMAHandle vma, VMAPermission new_perms);
+ VMAHandle Reprotect(VMAHandle vma, VMAPermission new_perms);
+
+ /// Changes the permissions of a range of addresses, splitting VMAs as necessary.
+ ResultCode ReprotectRange(VAddr target, u32 size, VMAPermission new_perms);
+
+ /**
+ * Scans all VMAs and updates the page table range of any that use the given vector as backing
+ * memory. This should be called after any operation that causes reallocation of the vector.
+ */
+ void RefreshMemoryBlockMappings(const std::vector<u8>* block);
/// Dumps the address space layout to the log, for debugging
void LogLayout(Log::Level log_level) const;
@@ -186,6 +195,9 @@ private:
/// Converts a VMAHandle to a mutable VMAIter.
VMAIter StripIterConstness(const VMAHandle& iter);
+ /// Unmaps the given VMA.
+ VMAIter Unmap(VMAIter vma);
+
/**
* Carves a VMA of a specific size at the specified address by splitting Free VMAs while doing
* the appropriate error checking.
@@ -193,6 +205,12 @@ private:
ResultVal<VMAIter> CarveVMA(VAddr base, u32 size);
/**
+ * Splits the edges of the given range of non-Free VMAs so that there is a VMA split at each
+ * end of the range.
+ */
+ ResultVal<VMAIter> CarveVMARange(VAddr base, u32 size);
+
+ /**
* Splits a VMA in two, at the specified offset.
* @returns the right side of the split, with the original iterator becoming the left side.
*/