Merge pull request #7701 from bunnei/clear-mem-pages

Kernel Memory Updates (Part 3): Clear KMemoryManager pages & other fixes
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bunnei 2022-01-18 21:20:42 -08:00 committed by GitHub
commit b5e83bcc7b
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5 changed files with 34 additions and 16 deletions

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@ -8,12 +8,16 @@
#include "common/assert.h"
#include "common/common_types.h"
#include "common/scope_exit.h"
#include "core/core.h"
#include "core/device_memory.h"
#include "core/hle/kernel/k_memory_manager.h"
#include "core/hle/kernel/k_page_linked_list.h"
#include "core/hle/kernel/svc_results.h"
namespace Kernel {
KMemoryManager::KMemoryManager(Core::System& system_) : system{system_} {}
std::size_t KMemoryManager::Impl::Initialize(Pool new_pool, u64 start_address, u64 end_address) {
const auto size{end_address - start_address};
@ -81,7 +85,7 @@ VAddr KMemoryManager::AllocateAndOpenContinuous(std::size_t num_pages, std::size
}
ResultCode KMemoryManager::Allocate(KPageLinkedList& page_list, std::size_t num_pages, Pool pool,
Direction dir) {
Direction dir, u32 heap_fill_value) {
ASSERT(page_list.GetNumPages() == 0);
// Early return if we're allocating no pages
@ -139,6 +143,12 @@ ResultCode KMemoryManager::Allocate(KPageLinkedList& page_list, std::size_t num_
}
}
// Clear allocated memory.
for (const auto& it : page_list.Nodes()) {
std::memset(system.DeviceMemory().GetPointer(it.GetAddress()), heap_fill_value,
it.GetSize());
}
// Only succeed if we allocated as many pages as we wanted
if (num_pages) {
return ResultOutOfMemory;
@ -146,11 +156,12 @@ ResultCode KMemoryManager::Allocate(KPageLinkedList& page_list, std::size_t num_
// We succeeded!
group_guard.Cancel();
return ResultSuccess;
}
ResultCode KMemoryManager::Free(KPageLinkedList& page_list, std::size_t num_pages, Pool pool,
Direction dir) {
Direction dir, u32 heap_fill_value) {
// Early return if we're freeing no pages
if (!num_pages) {
return ResultSuccess;

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@ -12,6 +12,10 @@
#include "core/hle/kernel/k_page_heap.h"
#include "core/hle/result.h"
namespace Core {
class System;
}
namespace Kernel {
class KPageLinkedList;
@ -42,7 +46,7 @@ public:
Mask = (0xF << Shift),
};
KMemoryManager() = default;
explicit KMemoryManager(Core::System& system_);
constexpr std::size_t GetSize(Pool pool) const {
return managers[static_cast<std::size_t>(pool)].GetSize();
@ -51,10 +55,10 @@ public:
void InitializeManager(Pool pool, u64 start_address, u64 end_address);
VAddr AllocateAndOpenContinuous(size_t num_pages, size_t align_pages, u32 option);
ResultCode Allocate(KPageLinkedList& page_list, std::size_t num_pages, Pool pool,
Direction dir = Direction::FromFront);
ResultCode Free(KPageLinkedList& page_list, std::size_t num_pages, Pool pool,
Direction dir = Direction::FromFront);
ResultCode Allocate(KPageLinkedList& page_list, std::size_t num_pages, Pool pool, Direction dir,
u32 heap_fill_value = 0);
ResultCode Free(KPageLinkedList& page_list, std::size_t num_pages, Pool pool, Direction dir,
u32 heap_fill_value = 0);
static constexpr std::size_t MaxManagerCount = 10;
@ -129,6 +133,7 @@ private:
};
private:
Core::System& system;
std::array<std::mutex, static_cast<std::size_t>(Pool::Count)> pool_locks;
std::array<Impl, MaxManagerCount> managers;
};

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@ -289,8 +289,8 @@ ResultCode KPageTable::MapProcessCode(VAddr addr, std::size_t num_pages, KMemory
}
KPageLinkedList page_linked_list;
CASCADE_CODE(
system.Kernel().MemoryManager().Allocate(page_linked_list, num_pages, memory_pool));
CASCADE_CODE(system.Kernel().MemoryManager().Allocate(page_linked_list, num_pages, memory_pool,
allocation_option));
CASCADE_CODE(Operate(addr, num_pages, page_linked_list, OperationType::MapGroup));
block_manager->Update(addr, num_pages, state, perm);
@ -457,8 +457,8 @@ ResultCode KPageTable::MapPhysicalMemory(VAddr addr, std::size_t size) {
KPageLinkedList page_linked_list;
CASCADE_CODE(
system.Kernel().MemoryManager().Allocate(page_linked_list, remaining_pages, memory_pool));
CASCADE_CODE(system.Kernel().MemoryManager().Allocate(page_linked_list, remaining_pages,
memory_pool, allocation_option));
// We succeeded, so commit the memory reservation.
memory_reservation.Commit();
@ -541,7 +541,8 @@ ResultCode KPageTable::UnmapMemory(VAddr addr, std::size_t size) {
}
const std::size_t num_pages{size / PageSize};
system.Kernel().MemoryManager().Free(page_linked_list, num_pages, memory_pool);
system.Kernel().MemoryManager().Free(page_linked_list, num_pages, memory_pool,
allocation_option);
block_manager->Update(addr, num_pages, KMemoryState::Free);
@ -960,7 +961,7 @@ ResultCode KPageTable::SetHeapSize(VAddr* out, std::size_t size) {
// Allocate pages for the heap extension.
KPageLinkedList page_linked_list;
R_TRY(system.Kernel().MemoryManager().Allocate(page_linked_list, allocation_size / PageSize,
memory_pool));
memory_pool, allocation_option));
// Map the pages.
{
@ -1027,8 +1028,8 @@ ResultVal<VAddr> KPageTable::AllocateAndMapMemory(std::size_t needed_num_pages,
CASCADE_CODE(Operate(addr, needed_num_pages, perm, OperationType::Map, map_addr));
} else {
KPageLinkedList page_group;
CASCADE_CODE(
system.Kernel().MemoryManager().Allocate(page_group, needed_num_pages, memory_pool));
CASCADE_CODE(system.Kernel().MemoryManager().Allocate(page_group, needed_num_pages,
memory_pool, allocation_option));
CASCADE_CODE(Operate(addr, needed_num_pages, page_group, OperationType::MapGroup));
}

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@ -303,6 +303,7 @@ private:
bool is_aslr_enabled{};
KMemoryManager::Pool memory_pool{KMemoryManager::Pool::Application};
KMemoryManager::Direction allocation_option{KMemoryManager::Direction::FromFront};
Common::PageTable page_table_impl;

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@ -631,7 +631,7 @@ struct KernelCore::Impl {
const auto application_pool = memory_layout.GetKernelApplicationPoolRegionPhysicalExtents();
// Initialize memory managers
memory_manager = std::make_unique<KMemoryManager>();
memory_manager = std::make_unique<KMemoryManager>(system);
memory_manager->InitializeManager(KMemoryManager::Pool::Application,
application_pool.GetAddress(),
application_pool.GetEndAddress());