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kernel+libluna: Avoid scrubbing when the memory is going to be overwritten anyway

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This is the case for objects with constructors and temporary memory which is filled afterwards.
This commit is contained in:
apio 2023-08-27 20:48:33 +02:00
parent d48142f163
commit 6f3ed70363
Signed by: apio
GPG Key ID: B8A7D06E42258954
3 changed files with 4 additions and 4 deletions
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2
kernel/src/sys/poll.cpp
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@ -12,7 +12,7 @@ Result<u64> sys_poll(Registers*, SyscallArgs args)
nfds_t nfds = (nfds_t)args[1]; nfds_t nfds = (nfds_t)args[1];
int timeout = (int)args[2]; int timeout = (int)args[2];
struct pollfd* kfds = (struct pollfd*)TRY(malloc_impl(nfds * sizeof(pollfd))); struct pollfd* kfds = (struct pollfd*)TRY(malloc_impl(nfds * sizeof(pollfd), false, false));
auto guard = make_scope_guard([kfds] { free_impl(kfds); }); auto guard = make_scope_guard([kfds] { free_impl(kfds); });
if (!MemoryManager::copy_from_user(fds, kfds, nfds * sizeof(pollfd))) return err(EFAULT); if (!MemoryManager::copy_from_user(fds, kfds, nfds * sizeof(pollfd))) return err(EFAULT);

2
libluna/include/luna/Alloc.h
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@ -24,7 +24,7 @@
*/ */
template <typename T, class... Args> [[nodiscard]] Result<T*> make(Args... args) template <typename T, class... Args> [[nodiscard]] Result<T*> make(Args... args)
{ {
T* const result = (T*)TRY(malloc_impl(sizeof(T))); T* const result = (T*)TRY(malloc_impl(sizeof(T), false, false));
new (result) T(args...); new (result) T(args...);
return result; return result;
} }

4
libluna/src/Heap.cpp
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@ -425,12 +425,12 @@ void dump_heap_usage()
#ifdef USE_FREESTANDING #ifdef USE_FREESTANDING
void* operator new(usize size, const std::nothrow_t&) noexcept void* operator new(usize size, const std::nothrow_t&) noexcept
{ {
return malloc_impl(size).value_or(nullptr); return malloc_impl(size, false, false).value_or(nullptr);
} }
void* operator new[](usize size, const std::nothrow_t&) noexcept void* operator new[](usize size, const std::nothrow_t&) noexcept
{ {
return malloc_impl(size).value_or(nullptr); return malloc_impl(size, false, false).value_or(nullptr);
} }
void operator delete(void* p) noexcept void operator delete(void* p) noexcept