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https://github.com/RGBCube/serenity
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Kernel: Make VirtualRangeAllocator return KResultOr<VirtualRange>
This achieves two things: - The allocator can report more specific errors - Callers can (and now do) use TRY() :^)
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parent
21f7932ae2
commit
f4a9a0d561
9 changed files with 82 additions and 95 deletions
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@ -191,22 +191,20 @@ KResultOr<FlatPtr> Process::sys$mmap(Userspace<const Syscall::SC_mmap_params*> u
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return EINVAL;
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Memory::Region* region = nullptr;
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Optional<Memory::VirtualRange> range;
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if (map_randomized) {
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range = address_space().page_directory().range_allocator().allocate_randomized(Memory::page_round_up(size), alignment);
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} else {
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range = address_space().allocate_range(VirtualAddress(addr), size, alignment);
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if (!range.has_value()) {
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auto range = TRY([&]() -> KResultOr<Memory::VirtualRange> {
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if (map_randomized) {
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return address_space().page_directory().range_allocator().try_allocate_randomized(Memory::page_round_up(size), alignment);
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}
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auto range = address_space().try_allocate_range(VirtualAddress(addr), size, alignment);
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if (range.is_error()) {
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if (addr && !map_fixed) {
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// If there's an address but MAP_FIXED wasn't specified, the address is just a hint.
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range = address_space().allocate_range({}, size, alignment);
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range = address_space().try_allocate_range({}, size, alignment);
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}
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}
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}
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if (!range.has_value())
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return ENOMEM;
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return range;
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}());
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if (map_anonymous) {
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auto strategy = map_noreserve ? AllocationStrategy::None : AllocationStrategy::Reserve;
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@ -217,7 +215,7 @@ KResultOr<FlatPtr> Process::sys$mmap(Userspace<const Syscall::SC_mmap_params*> u
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vmobject = TRY(Memory::AnonymousVMObject::try_create_with_size(Memory::page_round_up(size), strategy));
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}
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region = TRY(address_space().allocate_region_with_vmobject(range.value(), vmobject.release_nonnull(), 0, {}, prot, map_shared));
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region = TRY(address_space().allocate_region_with_vmobject(range, vmobject.release_nonnull(), 0, {}, prot, map_shared));
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} else {
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if (offset < 0)
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return EINVAL;
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@ -238,7 +236,7 @@ KResultOr<FlatPtr> Process::sys$mmap(Userspace<const Syscall::SC_mmap_params*> u
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return EACCES;
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}
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region = TRY(description->mmap(*this, range.value(), static_cast<u64>(offset), prot, map_shared));
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region = TRY(description->mmap(*this, range, static_cast<u64>(offset), prot, map_shared));
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}
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if (!region)
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@ -549,11 +547,8 @@ KResultOr<FlatPtr> Process::sys$allocate_tls(Userspace<const char*> initial_data
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if (multiple_threads)
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return EINVAL;
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auto range = address_space().allocate_range({}, size);
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if (!range.has_value())
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return ENOMEM;
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auto region = TRY(address_space().allocate_region(range.value(), String("Master TLS"), PROT_READ | PROT_WRITE));
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auto range = TRY(address_space().try_allocate_range({}, size));
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auto region = TRY(address_space().allocate_region(range, String("Master TLS"), PROT_READ | PROT_WRITE));
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m_master_tls_region = region->make_weak_ptr();
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m_master_tls_size = size;
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