Kernel: Invoke heap constructors separately early on

By having a separate list of constructors for the kernel heap
code, we can properly use constructors without re-running them
after the heap was already initialized. This solves some problems
where values were wiped out because they were overwritten by
running their constructors later in the initialization process.

1 files changed, 3 insertions, 4 deletions

diff --git a/Kernel/Heap/SlabAllocator.cpp b/Kernel/Heap/SlabAllocator.cpp
index b3ba8c1cce..e0ecff38c1 100644
--- a/Kernel/Heap/SlabAllocator.cpp
+++ b/Kernel/Heap/SlabAllocator.cpp
@@ -100,12 +100,11 @@ private:
         char padding[templated_slab_size - sizeof(FreeSlab*)];
     };
 
-    // NOTE: These are not default-initialized to prevent an init-time constructor from overwriting them
-    FreeSlab* m_freelist;
+    FreeSlab* m_freelist { nullptr };
     Atomic<size_t> m_num_allocated;
     Atomic<size_t> m_num_free;
-    void* m_base;
-    void* m_end;
+    void* m_base { nullptr };
+    void* m_end { nullptr };
     SpinLock<u32> m_lock;
 
     static_assert(sizeof(FreeSlab) == templated_slab_size);