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Kernel: Make sure MSB is not set on SMO keys

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Bananymous
2024-05-29 20:01:12 +03:00
parent a1b3490764
commit 6840a8983c
2 changed files with 6 additions and 3 deletions
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2
kernel/include/kernel/Memory/SharedMemoryObject.h
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@@ -14,7 +14,7 @@ namespace Kernel
class SharedMemoryObjectManager class SharedMemoryObjectManager
{ {
public: public:
using Key = uint32_t; using Key = size_t;
public: public:
static BAN::ErrorOr<void> initialize(); static BAN::ErrorOr<void> initialize();

7
kernel/kernel/Memory/SharedMemoryObject.cpp
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@@ -32,9 +32,12 @@ namespace Kernel
LockGuard _(m_mutex); LockGuard _(m_mutex);
Key key = Random::get<Key>(); // NOTE: don't set the top bit so cast to signed is not negative
auto generate_key = []() { return Random::get<Key>() & (~(Key)0 >> 1); };
Key key = generate_key();
while (m_objects.contains(key)) while (m_objects.contains(key))
key = Random::get<Key>(); key = generate_key();
TRY(m_objects.insert(key, object)); TRY(m_objects.insert(key, object));
return key; return key;