mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-16 01:49:32 +00:00
93 lines
No EOL
3.4 KiB
C++
93 lines
No EOL
3.4 KiB
C++
/*
|
|
* Copyright (c) Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <stratosphere.hpp>
|
|
#include "lmem_impl_common_heap.hpp"
|
|
|
|
namespace ams::lmem::impl {
|
|
|
|
namespace {
|
|
|
|
u32 g_fill_values[FillType_Count] = {
|
|
0xC3C3C3C3, /* FillType_Unallocated */
|
|
0xF3F3F3F3, /* FillType_Allocated */
|
|
0xD3D3D3D3, /* FillType_Freed */
|
|
};
|
|
|
|
}
|
|
|
|
void InitializeHeapHead(HeapHead *out, u32 magic, void *start, void *end, u32 option) {
|
|
/* Call member constructors. */
|
|
std::construct_at(std::addressof(out->list_node));
|
|
std::construct_at(std::addressof(out->child_list));
|
|
|
|
/* Set fields. */
|
|
out->magic = magic;
|
|
out->heap_start = start;
|
|
out->heap_end = end;
|
|
out->option = static_cast<u8>(option);
|
|
|
|
/* Fill memory with pattern if needed. */
|
|
FillUnallocatedMemory(out, start, GetPointerDifference(start, end));
|
|
}
|
|
|
|
void FinalizeHeap(HeapHead *heap) {
|
|
/* Nothing actually needs to be done here. */
|
|
AMS_UNUSED(heap);
|
|
}
|
|
|
|
bool ContainsAddress(HeapHandle handle, const void *address) {
|
|
const uintptr_t uptr_handle = reinterpret_cast<uintptr_t>(handle);
|
|
const uintptr_t uptr_start = reinterpret_cast<uintptr_t>(handle->heap_start);
|
|
const uintptr_t uptr_end = reinterpret_cast<uintptr_t>(handle->heap_end);
|
|
const uintptr_t uptr_addr = reinterpret_cast<uintptr_t>(address);
|
|
|
|
if (uptr_start - sizeof(HeapHead) == uptr_handle) {
|
|
/* The heap head is at the start of the managed memory. */
|
|
return uptr_handle <= uptr_addr && uptr_addr < uptr_end;
|
|
} else if (uptr_handle == uptr_end) {
|
|
/* The heap head is at the end of the managed memory. */
|
|
return uptr_start <= uptr_addr && uptr_addr < uptr_end + sizeof(HeapHead);
|
|
} else {
|
|
/* Heap head is somewhere unrelated to managed memory. */
|
|
return uptr_start <= uptr_addr && uptr_addr < uptr_end;
|
|
}
|
|
}
|
|
|
|
size_t GetHeapTotalSize(HeapHandle handle) {
|
|
const uintptr_t uptr_start = reinterpret_cast<uintptr_t>(handle->heap_start);
|
|
const uintptr_t uptr_end = reinterpret_cast<uintptr_t>(handle->heap_end);
|
|
|
|
if (ContainsAddress(handle, reinterpret_cast<const void *>(handle))) {
|
|
/* The heap metadata is contained within the heap, either before or after. */
|
|
return static_cast<size_t>(uptr_end - uptr_start + sizeof(HeapHead));
|
|
} else {
|
|
/* The heap metadata is not contained within the heap. */
|
|
return static_cast<size_t>(uptr_end - uptr_start);
|
|
}
|
|
}
|
|
|
|
u32 GetDebugFillValue(FillType type) {
|
|
return g_fill_values[type];
|
|
}
|
|
|
|
u32 SetDebugFillValue(FillType type, u32 value) {
|
|
const u32 old_value = g_fill_values[type];
|
|
g_fill_values[type] = value;
|
|
return old_value;
|
|
}
|
|
|
|
|
|
} |