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kern: improve KMemoryManager pool detection

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Michael Scire 2020-12-01 17:03:00 -08:00 committed by SciresM
parent aac8af8bf5
commit 1ca64cf2a1
3 changed files with 70 additions and 40 deletions
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4
libraries/libmesosphere/include/mesosphere/kern_k_memory_manager.hpp
View file

@ -70,11 +70,13 @@ namespace ams::kern {
public:
Impl() : heap(), page_reference_counts(), management_region(), pool(), next(), prev() { /* ... */ }
size_t Initialize(const KMemoryRegion *region, Pool pool, KVirtualAddress management_region, KVirtualAddress management_region_end);
size_t Initialize(uintptr_t address, size_t size, KVirtualAddress management, KVirtualAddress management_end, Pool p);
KVirtualAddress AllocateBlock(s32 index, bool random) { return this->heap.AllocateBlock(index, random); }
void Free(KVirtualAddress addr, size_t num_pages) { this->heap.Free(addr, num_pages); }
void UpdateUsedHeapSize() { this->heap.UpdateUsedSize(); }
void InitializeOptimizedMemory() { std::memset(GetVoidPointer(this->management_region), 0, CalculateOptimizedProcessOverheadSize(this->heap.GetSize())); }
void TrackUnoptimizedAllocation(KVirtualAddress block, size_t num_pages);

9
libraries/libmesosphere/source/kern_initial_process.cpp
View file

@ -26,7 +26,9 @@ namespace ams::kern {
};
KVirtualAddress GetInitialProcessBinaryAddress() {
return KMemoryLayout::GetPageTableHeapRegion().GetEndAddress() - InitialProcessBinarySizeMax;
const uintptr_t end_address = KMemoryLayout::GetPageTableHeapRegion().GetEndAddress();
MESOSPHERE_ABORT_UNLESS(end_address != 0);
return end_address - InitialProcessBinarySizeMax;
}
void LoadInitialProcessBinaryHeader(InitialProcessBinaryHeader *header) {
@ -97,8 +99,11 @@ namespace ams::kern {
/* Ensure that we do not leak pages. */
ON_SCOPE_EXIT { pg.Close(); };
/* Map the process's memory into the temporary region. */
/* Get the temporary region. */
const auto &temp_region = KMemoryLayout::GetTempRegion();
MESOSPHERE_ABORT_UNLESS(temp_region.GetEndAddress() != 0);
/* Map the process's memory into the temporary region. */
KProcessAddress temp_address = Null<KProcessAddress>;
MESOSPHERE_R_ABORT_UNLESS(Kernel::GetKernelPageTable().MapPageGroup(std::addressof(temp_address), pg, temp_region.GetAddress(), temp_region.GetSize() / PageSize, KMemoryState_Kernel, KMemoryPermission_KernelReadWrite));

97
libraries/libmesosphere/source/kern_k_memory_manager.cpp
View file

@ -20,12 +20,16 @@ namespace ams::kern {
namespace {
constexpr KMemoryManager::Pool GetPoolFromMemoryRegionType(u32 type) {
switch (type) {
case KMemoryRegionType_VirtualDramApplicationPool: return KMemoryManager::Pool_Application;
case KMemoryRegionType_VirtualDramAppletPool: return KMemoryManager::Pool_Applet;
case KMemoryRegionType_VirtualDramSystemPool: return KMemoryManager::Pool_System;
case KMemoryRegionType_VirtualDramSystemNonSecurePool: return KMemoryManager::Pool_SystemNonSecure;
MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
if ((type | KMemoryRegionType_VirtualDramApplicationPool) == type) {
return KMemoryManager::Pool_Application;
} else if ((type | KMemoryRegionType_VirtualDramAppletPool) == type) {
return KMemoryManager::Pool_Applet;
} else if ((type | KMemoryRegionType_VirtualDramSystemPool) == type) {
return KMemoryManager::Pool_System;
} else if ((type | KMemoryRegionType_VirtualDramSystemNonSecurePool) == type) {
return KMemoryManager::Pool_SystemNonSecure;
} else {
MESOSPHERE_PANIC("InvalidMemoryRegionType for conversion to Pool");
}
}
@ -37,9 +41,11 @@ namespace ams::kern {
std::memset(GetVoidPointer(management_region), 0, management_region_size);
/* Traverse the virtual memory layout tree, initializing each manager as appropriate. */
while (true) {
while (this->num_managers != MaxManagerCount) {
/* Locate the region that should initialize the current manager. */
const KMemoryRegion *region = nullptr;
uintptr_t region_address = 0;
size_t region_size = 0;
Pool region_pool = Pool_Count;
for (const auto &it : KMemoryLayout::GetVirtualMemoryRegionTree()) {
/* We only care about regions that we need to create managers for. */
if (!it.IsDerivedFrom(KMemoryRegionType_VirtualDramUserPool)) {
@ -51,39 +57,62 @@ namespace ams::kern {
continue;
}
region = std::addressof(it);
break;
/* Validate the region. */
MESOSPHERE_ABORT_UNLESS(it.GetEndAddress() != 0);
MESOSPHERE_ASSERT(it.GetAddress() != Null<decltype(it.GetAddress())>);
MESOSPHERE_ASSERT(it.GetSize() > 0);
/* Update the region's extents. */
if (region_address == 0) {
region_address = it.GetAddress();
region_size = it.GetSize();
region_pool = GetPoolFromMemoryRegionType(it.GetType());
} else {
MESOSPHERE_ASSERT(it.GetAddress() > region_address + region_size);
/* Update the size. */
region_size = it.GetEndAddress() - region_address;
MESOSPHERE_ABORT_UNLESS(GetPoolFromMemoryRegionType(it.GetType()) == region_pool);
}
}
/* If we didn't find a region, then we're done initializing managers. */
if (region == nullptr) {
/* If we didn't find a region, we're done. */
if (region_size == 0) {
break;
}
/* Ensure that the region is correct. */
MESOSPHERE_ASSERT(region->GetAddress() != Null<decltype(region->GetAddress())>);
MESOSPHERE_ASSERT(region->GetSize() > 0);
MESOSPHERE_ASSERT(region->GetEndAddress() >= region->GetAddress());
MESOSPHERE_ASSERT(region->IsDerivedFrom(KMemoryRegionType_VirtualDramUserPool));
MESOSPHERE_ASSERT(region->GetAttributes() == this->num_managers);
/* Initialize a new manager for the region. */
const Pool pool = GetPoolFromMemoryRegionType(region->GetType());
Impl *manager = std::addressof(this->managers[this->num_managers++]);
MESOSPHERE_ABORT_UNLESS(this->num_managers <= util::size(this->managers));
const size_t cur_size = manager->Initialize(region, pool, management_region, management_region_end);
const size_t cur_size = manager->Initialize(region_address, region_size, management_region, management_region_end, region_pool);
management_region += cur_size;
MESOSPHERE_ABORT_UNLESS(management_region <= management_region_end);
/* Insert the manager into the pool list. */
if (this->pool_managers_tail[pool] == nullptr) {
this->pool_managers_head[pool] = manager;
if (this->pool_managers_tail[region_pool] == nullptr) {
this->pool_managers_head[region_pool] = manager;
} else {
this->pool_managers_tail[pool]->SetNext(manager);
manager->SetPrev(this->pool_managers_tail[pool]);
this->pool_managers_tail[region_pool]->SetNext(manager);
manager->SetPrev(this->pool_managers_tail[region_pool]);
}
this->pool_managers_tail[pool] = manager;
this->pool_managers_tail[region_pool] = manager;
}
/* Free each region to its corresponding heap. */
for (const auto &it : KMemoryLayout::GetVirtualMemoryRegionTree()) {
if (it.IsDerivedFrom(KMemoryRegionType_VirtualDramUserPool)) {
/* Check the region. */
MESOSPHERE_ABORT_UNLESS(it.GetEndAddress() != 0);
/* Free the memory to the heap. */
this->managers[it.GetAttributes()].Free(it.GetAddress(), it.GetSize() / PageSize);
}
}
/* Update the used size for all managers. */
for (size_t i = 0; i < this->num_managers; ++i) {
this->managers[i].UpdateUsedHeapSize();
}
}
@ -354,12 +383,12 @@ namespace ams::kern {
return ResultSuccess();
}
size_t KMemoryManager::Impl::Initialize(const KMemoryRegion *region, Pool p, KVirtualAddress management, KVirtualAddress management_end) {
size_t KMemoryManager::Impl::Initialize(uintptr_t address, size_t size, KVirtualAddress management, KVirtualAddress management_end, Pool p) {
/* Calculate management sizes. */
const size_t ref_count_size = (region->GetSize() / PageSize) * sizeof(u16);
const size_t optimize_map_size = CalculateOptimizedProcessOverheadSize(region->GetSize());
const size_t ref_count_size = (size / PageSize) * sizeof(u16);
const size_t optimize_map_size = CalculateOptimizedProcessOverheadSize(size);
const size_t manager_size = util::AlignUp(optimize_map_size + ref_count_size, PageSize);
const size_t page_heap_size = KPageHeap::CalculateManagementOverheadSize(region->GetSize());
const size_t page_heap_size = KPageHeap::CalculateManagementOverheadSize(size);
const size_t total_management_size = manager_size + page_heap_size;
MESOSPHERE_ABORT_UNLESS(manager_size <= total_management_size);
MESOSPHERE_ABORT_UNLESS(management + total_management_size <= management_end);
@ -372,13 +401,7 @@ namespace ams::kern {
MESOSPHERE_ABORT_UNLESS(util::IsAligned(GetInteger(this->management_region), PageSize));
/* Initialize the manager's KPageHeap. */
this->heap.Initialize(region->GetAddress(), region->GetSize(), management + manager_size, page_heap_size);
/* Free the memory to the heap. */
this->heap.Free(region->GetAddress(), region->GetSize() / PageSize);
/* Update the heap's used size. */
this->heap.UpdateUsedSize();
this->heap.Initialize(address, size, management + manager_size, page_heap_size);
return total_management_size;
}