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-rw-r--r--src/core/hle/kernel/svc.cpp9
-rw-r--r--src/core/hle/kernel/vm_manager.cpp76
-rw-r--r--src/core/hle/kernel/vm_manager.h55
3 files changed, 81 insertions, 59 deletions
diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index e5e7f99e1..09d1eadb6 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -175,11 +175,8 @@ static ResultCode SetHeapSize(VAddr* heap_addr, u64 heap_size) {
return ERR_INVALID_SIZE;
}
- auto& vm_manager = Core::CurrentProcess()->VMManager();
- const VAddr heap_base = vm_manager.GetHeapRegionBaseAddress();
- const auto alloc_result =
- vm_manager.HeapAllocate(heap_base, heap_size, VMAPermission::ReadWrite);
-
+ auto& vm_manager = Core::System::GetInstance().Kernel().CurrentProcess()->VMManager();
+ const auto alloc_result = vm_manager.SetHeapSize(heap_size);
if (alloc_result.Failed()) {
return alloc_result.Code();
}
@@ -809,7 +806,7 @@ static ResultCode GetInfo(u64* result, u64 info_id, u64 handle, u64 info_sub_id)
return RESULT_SUCCESS;
case GetInfoType::TotalHeapUsage:
- *result = process->VMManager().GetTotalHeapUsage();
+ *result = process->VMManager().GetCurrentHeapSize();
return RESULT_SUCCESS;
case GetInfoType::IsVirtualAddressMemoryEnabled:
diff --git a/src/core/hle/kernel/vm_manager.cpp b/src/core/hle/kernel/vm_manager.cpp
index 22bf55ce7..ec0a480ce 100644
--- a/src/core/hle/kernel/vm_manager.cpp
+++ b/src/core/hle/kernel/vm_manager.cpp
@@ -256,57 +256,50 @@ ResultCode VMManager::ReprotectRange(VAddr target, u64 size, VMAPermission new_p
return RESULT_SUCCESS;
}
-ResultVal<VAddr> VMManager::HeapAllocate(VAddr target, u64 size, VMAPermission perms) {
- if (!IsWithinHeapRegion(target, size)) {
- return ERR_INVALID_ADDRESS;
+ResultVal<VAddr> VMManager::SetHeapSize(u64 size) {
+ if (size > GetHeapRegionSize()) {
+ return ERR_OUT_OF_MEMORY;
+ }
+
+ // No need to do any additional work if the heap is already the given size.
+ if (size == GetCurrentHeapSize()) {
+ return MakeResult(heap_region_base);
}
if (heap_memory == nullptr) {
// Initialize heap
- heap_memory = std::make_shared<std::vector<u8>>();
- heap_start = heap_end = target;
+ heap_memory = std::make_shared<std::vector<u8>>(size);
+ heap_end = heap_region_base + size;
} else {
- UnmapRange(heap_start, heap_end - heap_start);
- }
-
- // 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;
- RefreshMemoryBlockMappings(heap_memory.get());
- }
- if (target + size > heap_end) {
- heap_memory->insert(end(*heap_memory), (target + size) - heap_end, 0);
- heap_end = target + size;
- RefreshMemoryBlockMappings(heap_memory.get());
+ UnmapRange(heap_region_base, GetCurrentHeapSize());
}
- ASSERT(heap_end - heap_start == heap_memory->size());
- CASCADE_RESULT(auto vma, MapMemoryBlock(target, heap_memory, target - heap_start, size,
- MemoryState::Heap));
- Reprotect(vma, perms);
+ // If necessary, expand backing vector to cover new heap extents in
+ // the case of allocating. Otherwise, shrink the backing memory,
+ // if a smaller heap has been requested.
+ const u64 old_heap_size = GetCurrentHeapSize();
+ if (size > old_heap_size) {
+ const u64 alloc_size = size - old_heap_size;
- heap_used = size;
-
- return MakeResult<VAddr>(heap_end - size);
-}
+ heap_memory->insert(heap_memory->end(), alloc_size, 0);
+ RefreshMemoryBlockMappings(heap_memory.get());
+ } else if (size < old_heap_size) {
+ heap_memory->resize(size);
+ heap_memory->shrink_to_fit();
-ResultCode VMManager::HeapFree(VAddr target, u64 size) {
- if (!IsWithinHeapRegion(target, size)) {
- return ERR_INVALID_ADDRESS;
+ RefreshMemoryBlockMappings(heap_memory.get());
}
- if (size == 0) {
- return RESULT_SUCCESS;
- }
+ heap_end = heap_region_base + size;
+ ASSERT(GetCurrentHeapSize() == heap_memory->size());
- const ResultCode result = UnmapRange(target, size);
- if (result.IsError()) {
- return result;
+ const auto mapping_result =
+ MapMemoryBlock(heap_region_base, heap_memory, 0, size, MemoryState::Heap);
+ if (mapping_result.Failed()) {
+ return mapping_result.Code();
}
- heap_used -= size;
- return RESULT_SUCCESS;
+ return MakeResult<VAddr>(heap_region_base);
}
MemoryInfo VMManager::QueryMemory(VAddr address) const {
@@ -598,6 +591,7 @@ void VMManager::InitializeMemoryRegionRanges(FileSys::ProgramAddressSpaceType ty
heap_region_base = map_region_end;
heap_region_end = heap_region_base + heap_region_size;
+ heap_end = heap_region_base;
new_map_region_base = heap_region_end;
new_map_region_end = new_map_region_base + new_map_region_size;
@@ -692,10 +686,6 @@ u64 VMManager::GetTotalMemoryUsage() const {
return 0xF8000000;
}
-u64 VMManager::GetTotalHeapUsage() const {
- return heap_used;
-}
-
VAddr VMManager::GetAddressSpaceBaseAddress() const {
return address_space_base;
}
@@ -778,6 +768,10 @@ u64 VMManager::GetHeapRegionSize() const {
return heap_region_end - heap_region_base;
}
+u64 VMManager::GetCurrentHeapSize() const {
+ return heap_end - heap_region_base;
+}
+
bool VMManager::IsWithinHeapRegion(VAddr address, u64 size) const {
return IsInsideAddressRange(address, size, GetHeapRegionBaseAddress(),
GetHeapRegionEndAddress());
diff --git a/src/core/hle/kernel/vm_manager.h b/src/core/hle/kernel/vm_manager.h
index 7cdff6094..6f484b7bf 100644
--- a/src/core/hle/kernel/vm_manager.h
+++ b/src/core/hle/kernel/vm_manager.h
@@ -380,11 +380,41 @@ public:
/// Changes the permissions of a range of addresses, splitting VMAs as necessary.
ResultCode ReprotectRange(VAddr target, u64 size, VMAPermission new_perms);
- ResultVal<VAddr> HeapAllocate(VAddr target, u64 size, VMAPermission perms);
- ResultCode HeapFree(VAddr target, u64 size);
-
ResultCode MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size, MemoryState state);
+ /// Attempts to allocate a heap with the given size.
+ ///
+ /// @param size The size of the heap to allocate in bytes.
+ ///
+ /// @note If a heap is currently allocated, and this is called
+ /// with a size that is equal to the size of the current heap,
+ /// then this function will do nothing and return the current
+ /// heap's starting address, as there's no need to perform
+ /// any additional heap allocation work.
+ ///
+ /// @note If a heap is currently allocated, and this is called
+ /// with a size less than the current heap's size, then
+ /// this function will attempt to shrink the heap.
+ ///
+ /// @note If a heap is currently allocated, and this is called
+ /// with a size larger than the current heap's size, then
+ /// this function will attempt to extend the size of the heap.
+ ///
+ /// @returns A result indicating either success or failure.
+ /// <p>
+ /// If successful, this function will return a result
+ /// containing the starting address to the allocated heap.
+ /// <p>
+ /// If unsuccessful, this function will return a result
+ /// containing an error code.
+ ///
+ /// @pre The given size must lie within the allowable heap
+ /// memory region managed by this VMManager instance.
+ /// Failure to abide by this will result in ERR_OUT_OF_MEMORY
+ /// being returned as the result.
+ ///
+ ResultVal<VAddr> SetHeapSize(u64 size);
+
/// Queries the memory manager for information about the given address.
///
/// @param address The address to query the memory manager about for information.
@@ -418,9 +448,6 @@ public:
/// Gets the total memory usage, used by svcGetInfo
u64 GetTotalMemoryUsage() const;
- /// Gets the total heap usage, used by svcGetInfo
- u64 GetTotalHeapUsage() const;
-
/// Gets the address space base address
VAddr GetAddressSpaceBaseAddress() const;
@@ -469,6 +496,13 @@ public:
/// Gets the total size of the heap region in bytes.
u64 GetHeapRegionSize() const;
+ /// Gets the total size of the current heap in bytes.
+ ///
+ /// @note This is the current allocated heap size, not the size
+ /// of the region it's allowed to exist within.
+ ///
+ u64 GetCurrentHeapSize() const;
+
/// Determines whether or not the specified range is within the heap region.
bool IsWithinHeapRegion(VAddr address, u64 size) const;
@@ -617,9 +651,6 @@ private:
VAddr new_map_region_base = 0;
VAddr new_map_region_end = 0;
- VAddr main_code_region_base = 0;
- VAddr main_code_region_end = 0;
-
VAddr tls_io_region_base = 0;
VAddr tls_io_region_end = 0;
@@ -628,9 +659,9 @@ private:
// 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;
+
+ // The end of the currently allocated heap. This is not an inclusive
+ // end of the range. This is essentially 'base_address + current_size'.
VAddr heap_end = 0;
- u64 heap_used = 0;
};
} // namespace Kernel
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 03:40:10 +0100