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Kernel: Pass new region owner to Region::clone

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This commit is contained in:
Tom
2021-01-01 00:02:40 -07:00
committed by Andreas Kling
parent a0c91719d8
commit 2f429bd2d5
3 changed files with 6 additions and 6 deletions
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2
Kernel/Syscalls/fork.cpp
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@@ -88,7 +88,7 @@ pid_t Process::sys$fork(RegisterState& regs)
#ifdef FORK_DEBUG
dbg() << "fork: cloning Region{" << &region << "} '" << region.name() << "' @ " << region.vaddr();
#endif
auto region_clone = region.clone();
auto region_clone = region.clone(*child);
if (!region_clone) {
dbg() << "fork: Cannot clone region, insufficient memory";
// TODO: tear down new process?

8
Kernel/VM/Region.cpp
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@@ -86,7 +86,7 @@ void Region::unregister_purgeable_page_ranges()
}
}
OwnPtr<Region> Region::clone()
OwnPtr<Region> Region::clone(Process& new_owner)
{
ASSERT(Process::current());
@@ -98,7 +98,7 @@ OwnPtr<Region> Region::clone()
auto new_vmobject = AnonymousVMObject::create_with_size(size(), AllocationStrategy::Reserve); // TODO: inherit committed non-volatile areas?
if (!new_vmobject)
return {};
auto zeroed_region = Region::create_user_accessible(get_owner().ptr(), m_range, new_vmobject.release_nonnull(), 0, m_name, m_access);
auto zeroed_region = Region::create_user_accessible(&new_owner, m_range, new_vmobject.release_nonnull(), 0, m_name, m_access);
zeroed_region->copy_purgeable_page_ranges(*this);
zeroed_region->set_mmap(m_mmap);
zeroed_region->set_inherit_mode(m_inherit_mode);
@@ -114,7 +114,7 @@ OwnPtr<Region> Region::clone()
ASSERT(vmobject().is_shared_inode());
// Create a new region backed by the same VMObject.
auto region = Region::create_user_accessible(get_owner().ptr(), m_range, m_vmobject, m_offset_in_vmobject, m_name, m_access);
auto region = Region::create_user_accessible(&new_owner, m_range, m_vmobject, m_offset_in_vmobject, m_name, m_access);
if (m_vmobject->is_anonymous())
region->copy_purgeable_page_ranges(*this);
region->set_mmap(m_mmap);
@@ -134,7 +134,7 @@ OwnPtr<Region> Region::clone()
#endif
// Set up a COW region. The parent (this) region becomes COW as well!
remap();
auto clone_region = Region::create_user_accessible(get_owner().ptr(), m_range, vmobject_clone.release_nonnull(), m_offset_in_vmobject, m_name, m_access);
auto clone_region = Region::create_user_accessible(&new_owner, m_range, vmobject_clone.release_nonnull(), m_offset_in_vmobject, m_name, m_access);
if (m_vmobject->is_anonymous())
clone_region->copy_purgeable_page_ranges(*this);
if (m_stack) {

2
Kernel/VM/Region.h
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@@ -100,7 +100,7 @@ public:
PageFaultResponse handle_fault(const PageFault&);
OwnPtr<Region> clone();
OwnPtr<Region> clone(Process&);
bool contains(VirtualAddress vaddr) const
{