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Kernel: Pass "shared" flag to Region constructor

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Before this change, we would sometimes map a region into the address
space with !is_shared(), and then moments later call set_shared(true).

I found this very confusing while debugging, so this patch makes us pass
the initial shared flag to the Region constructor, ensuring that it's in
the correct state by the time we first map the region.
This commit is contained in:
Andreas Kling 2021-01-02 16:38:05 +01:00
parent 1898aa8cd4
commit 5dae85afe7
10 changed files with 21 additions and 20 deletions
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4
Kernel/VM/Region.h
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@ -61,7 +61,7 @@ public:
ZeroedOnFork,
};
static NonnullOwnPtr<Region> create_user_accessible(Process*, const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const StringView& name, u8 access, bool cacheable = true);
static NonnullOwnPtr<Region> create_user_accessible(Process*, const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const StringView& name, u8 access, bool cacheable = true, bool shared = false);
static NonnullOwnPtr<Region> create_kernel_only(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const StringView& name, u8 access, bool cacheable = true);
~Region();
@ -182,7 +182,7 @@ public:
Region* m_prev { nullptr };
// NOTE: These are public so we can make<> them.
Region(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String&, u8 access, bool cacheable, bool kernel);
Region(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String&, u8 access, bool cacheable, bool kernel, bool shared);
void set_inherit_mode(InheritMode inherit_mode) { m_inherit_mode = inherit_mode; }