mirror of
https://git.suyu.dev/suyu/suyu
synced 2024-10-31 20:37:52 +00:00
common: use memory holepunching when clearing memory
This commit is contained in:
parent
462ba1b360
commit
8ad5f2c506
4 changed files with 42 additions and 17 deletions
|
@ -11,10 +11,6 @@
|
||||||
|
|
||||||
#elif defined(__linux__) || defined(__FreeBSD__) // ^^^ Windows ^^^ vvv Linux vvv
|
#elif defined(__linux__) || defined(__FreeBSD__) // ^^^ Windows ^^^ vvv Linux vvv
|
||||||
|
|
||||||
#ifdef ANDROID
|
|
||||||
#include <android/sharedmem.h>
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#ifndef _GNU_SOURCE
|
#ifndef _GNU_SOURCE
|
||||||
#define _GNU_SOURCE
|
#define _GNU_SOURCE
|
||||||
#endif
|
#endif
|
||||||
|
@ -193,6 +189,11 @@ public:
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
bool ClearBackingRegion(size_t physical_offset, size_t length) {
|
||||||
|
// TODO: This does not seem to be possible on Windows.
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
void EnableDirectMappedAddress() {
|
void EnableDirectMappedAddress() {
|
||||||
// TODO
|
// TODO
|
||||||
UNREACHABLE();
|
UNREACHABLE();
|
||||||
|
@ -442,9 +443,7 @@ public:
|
||||||
}
|
}
|
||||||
|
|
||||||
// Backing memory initialization
|
// Backing memory initialization
|
||||||
#ifdef ANDROID
|
#if defined(__FreeBSD__) && __FreeBSD__ < 13
|
||||||
fd = ASharedMemory_create("HostMemory", backing_size);
|
|
||||||
#elif defined(__FreeBSD__) && __FreeBSD__ < 13
|
|
||||||
// XXX Drop after FreeBSD 12.* reaches EOL on 2024-06-30
|
// XXX Drop after FreeBSD 12.* reaches EOL on 2024-06-30
|
||||||
fd = shm_open(SHM_ANON, O_RDWR, 0600);
|
fd = shm_open(SHM_ANON, O_RDWR, 0600);
|
||||||
#else
|
#else
|
||||||
|
@ -455,7 +454,6 @@ public:
|
||||||
throw std::bad_alloc{};
|
throw std::bad_alloc{};
|
||||||
}
|
}
|
||||||
|
|
||||||
#ifndef ANDROID
|
|
||||||
// Defined to extend the file with zeros
|
// Defined to extend the file with zeros
|
||||||
int ret = ftruncate(fd, backing_size);
|
int ret = ftruncate(fd, backing_size);
|
||||||
if (ret != 0) {
|
if (ret != 0) {
|
||||||
|
@ -463,7 +461,6 @@ public:
|
||||||
strerror(errno));
|
strerror(errno));
|
||||||
throw std::bad_alloc{};
|
throw std::bad_alloc{};
|
||||||
}
|
}
|
||||||
#endif
|
|
||||||
|
|
||||||
backing_base = static_cast<u8*>(
|
backing_base = static_cast<u8*>(
|
||||||
mmap(nullptr, backing_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0));
|
mmap(nullptr, backing_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0));
|
||||||
|
@ -552,6 +549,19 @@ public:
|
||||||
ASSERT_MSG(ret == 0, "mprotect failed: {}", strerror(errno));
|
ASSERT_MSG(ret == 0, "mprotect failed: {}", strerror(errno));
|
||||||
}
|
}
|
||||||
|
|
||||||
|
bool ClearBackingRegion(size_t physical_offset, size_t length) {
|
||||||
|
#ifdef __linux__
|
||||||
|
// Set MADV_REMOVE on backing map to destroy it instantly.
|
||||||
|
// This also deletes the area from the backing file.
|
||||||
|
int ret = madvise(backing_base + physical_offset, length, MADV_REMOVE);
|
||||||
|
ASSERT_MSG(ret == 0, "madvise failed: {}", strerror(errno));
|
||||||
|
|
||||||
|
return true;
|
||||||
|
#else
|
||||||
|
return false;
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
void EnableDirectMappedAddress() {
|
void EnableDirectMappedAddress() {
|
||||||
virtual_base = nullptr;
|
virtual_base = nullptr;
|
||||||
}
|
}
|
||||||
|
@ -623,6 +633,10 @@ public:
|
||||||
|
|
||||||
void Protect(size_t virtual_offset, size_t length, bool read, bool write, bool execute) {}
|
void Protect(size_t virtual_offset, size_t length, bool read, bool write, bool execute) {}
|
||||||
|
|
||||||
|
bool ClearBackingRegion(size_t physical_offset, size_t length) {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
void EnableDirectMappedAddress() {}
|
void EnableDirectMappedAddress() {}
|
||||||
|
|
||||||
u8* backing_base{nullptr};
|
u8* backing_base{nullptr};
|
||||||
|
@ -698,6 +712,12 @@ void HostMemory::Protect(size_t virtual_offset, size_t length, bool read, bool w
|
||||||
impl->Protect(virtual_offset + virtual_base_offset, length, read, write, execute);
|
impl->Protect(virtual_offset + virtual_base_offset, length, read, write, execute);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
void HostMemory::ClearBackingRegion(size_t physical_offset, size_t length, u32 fill_value) {
|
||||||
|
if (!impl || fill_value != 0 || !impl->ClearBackingRegion(physical_offset, length)) {
|
||||||
|
std::memset(backing_base + physical_offset, fill_value, length);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
void HostMemory::EnableDirectMappedAddress() {
|
void HostMemory::EnableDirectMappedAddress() {
|
||||||
if (impl) {
|
if (impl) {
|
||||||
impl->EnableDirectMappedAddress();
|
impl->EnableDirectMappedAddress();
|
||||||
|
|
|
@ -48,6 +48,8 @@ public:
|
||||||
|
|
||||||
void EnableDirectMappedAddress();
|
void EnableDirectMappedAddress();
|
||||||
|
|
||||||
|
void ClearBackingRegion(size_t physical_offset, size_t length, u32 fill_value);
|
||||||
|
|
||||||
[[nodiscard]] u8* BackingBasePointer() noexcept {
|
[[nodiscard]] u8* BackingBasePointer() noexcept {
|
||||||
return backing_base;
|
return backing_base;
|
||||||
}
|
}
|
||||||
|
|
|
@ -421,8 +421,9 @@ Result KMemoryManager::AllocateForProcess(KPageGroup* out, size_t num_pages, u32
|
||||||
} else {
|
} else {
|
||||||
// Set all the allocated memory.
|
// Set all the allocated memory.
|
||||||
for (const auto& block : *out) {
|
for (const auto& block : *out) {
|
||||||
std::memset(m_system.DeviceMemory().GetPointer<void>(block.GetAddress()), fill_pattern,
|
m_system.DeviceMemory().buffer.ClearBackingRegion(GetInteger(block.GetAddress()) -
|
||||||
block.GetSize());
|
Core::DramMemoryMap::Base,
|
||||||
|
block.GetSize(), fill_pattern);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
@ -81,6 +81,11 @@ void InvalidateInstructionCache(KernelCore& kernel, AddressType addr, u64 size)
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
void ClearBackingRegion(Core::System& system, KPhysicalAddress addr, u64 size, u32 fill_value) {
|
||||||
|
system.DeviceMemory().buffer.ClearBackingRegion(GetInteger(addr) - Core::DramMemoryMap::Base,
|
||||||
|
size, fill_value);
|
||||||
|
}
|
||||||
|
|
||||||
template <typename AddressType>
|
template <typename AddressType>
|
||||||
Result InvalidateDataCache(AddressType addr, u64 size) {
|
Result InvalidateDataCache(AddressType addr, u64 size) {
|
||||||
R_SUCCEED();
|
R_SUCCEED();
|
||||||
|
@ -1363,8 +1368,7 @@ Result KPageTableBase::MapInsecureMemory(KProcessAddress address, size_t size) {
|
||||||
|
|
||||||
// Clear all the newly allocated pages.
|
// Clear all the newly allocated pages.
|
||||||
for (const auto& it : pg) {
|
for (const auto& it : pg) {
|
||||||
std::memset(GetHeapVirtualPointer(m_kernel, it.GetAddress()),
|
ClearBackingRegion(m_system, it.GetAddress(), it.GetSize(), m_heap_fill_value);
|
||||||
static_cast<u32>(m_heap_fill_value), it.GetSize());
|
|
||||||
}
|
}
|
||||||
|
|
||||||
// Lock the table.
|
// Lock the table.
|
||||||
|
@ -1570,8 +1574,7 @@ Result KPageTableBase::AllocateAndMapPagesImpl(PageLinkedList* page_list, KProce
|
||||||
|
|
||||||
// Clear all pages.
|
// Clear all pages.
|
||||||
for (const auto& it : pg) {
|
for (const auto& it : pg) {
|
||||||
std::memset(GetHeapVirtualPointer(m_kernel, it.GetAddress()),
|
ClearBackingRegion(m_system, it.GetAddress(), it.GetSize(), m_heap_fill_value);
|
||||||
static_cast<u32>(m_heap_fill_value), it.GetSize());
|
|
||||||
}
|
}
|
||||||
|
|
||||||
// Map the pages.
|
// Map the pages.
|
||||||
|
@ -2159,8 +2162,7 @@ Result KPageTableBase::SetHeapSize(KProcessAddress* out, size_t size) {
|
||||||
|
|
||||||
// Clear all the newly allocated pages.
|
// Clear all the newly allocated pages.
|
||||||
for (const auto& it : pg) {
|
for (const auto& it : pg) {
|
||||||
std::memset(GetHeapVirtualPointer(m_kernel, it.GetAddress()), m_heap_fill_value,
|
ClearBackingRegion(m_system, it.GetAddress(), it.GetSize(), m_heap_fill_value);
|
||||||
it.GetSize());
|
|
||||||
}
|
}
|
||||||
|
|
||||||
// Map the pages.
|
// Map the pages.
|
||||||
|
|
Loading…
Reference in a new issue