mirrors/ladybird
0
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-06-01 16:02:53 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 11

Kernel: Make AddressSpace::add_region() return KResultOr<Region*>

Browse source 
This allows us to use TRY() in a few places.
This commit is contained in:
Andreas Kling 2021-09-06 02:02:06 +02:00
parent 062cc804e7
commit a994f11f10
Notes: sideshowbarker 2024-07-18 04:38:46 +09:00
3 changed files with 9 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

20
Kernel/Memory/AddressSpace.cpp
View file

@ -144,9 +144,7 @@ KResultOr<Region*> AddressSpace::try_allocate_split_region(Region const& source_
{
auto new_region = TRY(Region::try_create_user_accessible(
range, source_region.vmobject(), offset_in_vmobject, KString::try_create(source_region.name()), source_region.access(), source_region.is_cacheable() ? Region::Cacheable::Yes : Region::Cacheable::No, source_region.is_shared()));
auto* region = add_region(move(new_region));
if (!region)
return ENOMEM;
auto* region = TRY(add_region(move(new_region)));
region->set_syscall_region(source_region.is_syscall_region());
region->set_mmap(source_region.is_mmap());
region->set_stack(source_region.is_stack());
@ -165,10 +163,7 @@ KResultOr<Region*> AddressSpace::allocate_region(VirtualRange const& range, Stri
auto region = TRY(Region::try_create_user_accessible(range, move(vmobject), 0, KString::try_create(name), prot_to_region_access_flags(prot), Region::Cacheable::Yes, false));
if (!region->map(page_directory()))
return ENOMEM;
auto* added_region = add_region(move(region));
if (!added_region)
return ENOMEM;
return added_region;
return add_region(move(region));
}
KResultOr<Region*> AddressSpace::allocate_region_with_vmobject(VirtualRange const& range, NonnullRefPtr<VMObject> vmobject, size_t offset_in_vmobject, StringView name, int prot, bool shared)
@ -189,9 +184,7 @@ KResultOr<Region*> AddressSpace::allocate_region_with_vmobject(VirtualRange cons
}
offset_in_vmobject &= PAGE_MASK;
auto region = TRY(Region::try_create_user_accessible(range, move(vmobject), offset_in_vmobject, KString::try_create(name), prot_to_region_access_flags(prot), Region::Cacheable::Yes, shared));
auto* added_region = add_region(move(region));
if (!added_region)
return ENOMEM;
auto* added_region = TRY(add_region(move(region)));
if (!added_region->map(page_directory()))
return ENOMEM;
return added_region;
@ -264,12 +257,13 @@ Vector<Region*> AddressSpace::find_regions_intersecting(VirtualRange const& rang
return regions;
}
Region* AddressSpace::add_region(NonnullOwnPtr<Region> region)
KResultOr<Region*> AddressSpace::add_region(NonnullOwnPtr<Region> region)
{
auto* ptr = region.ptr();
SpinlockLocker lock(m_lock);
auto success = m_regions.try_insert(region->vaddr().get(), move(region));
return success ? ptr : nullptr;
if (!m_regions.try_insert(region->vaddr().get(), move(region)))
return ENOMEM;
return ptr;
}
// Carve out a virtual address range from a region and return the two regions on either side

2
Kernel/Memory/AddressSpace.h
View file

@ -24,7 +24,7 @@ public:
PageDirectory& page_directory() { return *m_page_directory; }
const PageDirectory& page_directory() const { return *m_page_directory; }
Region* add_region(NonnullOwnPtr<Region>);
KResultOr<Region*> add_region(NonnullOwnPtr<Region>);
size_t region_count() const { return m_regions.size(); }

7
Kernel/Syscalls/fork.cpp
View file

@ -94,12 +94,7 @@ KResultOr<FlatPtr> Process::sys$fork(RegisterState& regs)
for (auto& region : address_space().regions()) {
dbgln_if(FORK_DEBUG, "fork: cloning Region({}) '{}' @ {}", region, region->name(), region->vaddr());
auto region_clone = TRY(region->try_clone());
auto* child_region = child->address_space().add_region(move(region_clone));
if (!child_region) {
dbgln("fork: Cannot add region, insufficient memory");
// TODO: tear down new process?
return ENOMEM;
}
auto* child_region = TRY(child->address_space().add_region(move(region_clone)));
if (!child_region->map(child->address_space().page_directory(), Memory::ShouldFlushTLB::No))
return ENOMEM;