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AK: Make Vector::try_* functions return ErrorOr<void>

Browse source 
Instead of signalling allocation failure with a bool return value
(false), we now use ErrorOr<void> and return ENOMEM as appropriate.
This allows us to use TRY() and MUST() with Vector. :^)
This commit is contained in:
Andreas Kling 2021-11-10 11:55:37 +01:00
parent cd49f30bea
commit 88b6428c25
16 changed files with 98 additions and 152 deletions
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9
Kernel/FileSystem/Ext2FileSystem.cpp
View file

@ -917,8 +917,7 @@ ErrorOr<void> Ext2FSInode::resize(u64 new_size)
if (blocks_needed_after > blocks_needed_before) {
auto blocks = TRY(fs().allocate_blocks(fs().group_index_from_inode(index()), blocks_needed_after - blocks_needed_before));
if (!m_block_list.try_extend(move(blocks)))
return ENOMEM;
TRY(m_block_list.try_extend(move(blocks)));
} else if (blocks_needed_after < blocks_needed_before) {
if constexpr (EXT2_VERY_DEBUG) {
dbgln("Ext2FSInode[{}]::resize(): Shrinking inode, old block list is {} entries:", identifier(), m_block_list.size());
@ -1264,8 +1263,7 @@ auto Ext2FS::allocate_blocks(GroupIndex preferred_group_index, size_t count) ->
return Vector<BlockIndex> {};
Vector<BlockIndex> blocks;
if (!blocks.try_ensure_capacity(count))
return ENOMEM;
TRY(blocks.try_ensure_capacity(count));
MutexLocker locker(m_lock);
auto group_index = preferred_group_index;
@ -1454,8 +1452,7 @@ ErrorOr<Ext2FS::CachedBitmap*> Ext2FS::get_bitmap_block(BlockIndex bitmap_block_
auto buffer = UserOrKernelBuffer::for_kernel_buffer(block->data());
TRY(read_block(bitmap_block_index, &buffer, block_size()));
auto new_bitmap = TRY(adopt_nonnull_own_or_enomem(new (nothrow) CachedBitmap(bitmap_block_index, move(block))));
if (!m_cached_bitmaps.try_append(move(new_bitmap)))
return ENOMEM;
TRY(m_cached_bitmaps.try_append(move(new_bitmap)));
return m_cached_bitmaps.last().ptr();
}

5
Kernel/FileSystem/ISO9660FileSystem.cpp
View file

@ -55,10 +55,7 @@ public:
if (has_flag(m_current_header->file_flags, ISO::FileFlags::Directory)) {
dbgln_if(ISO9660_VERY_DEBUG, "next(): Recursing");
{
bool result = m_directory_stack.try_append(move(m_current_directory));
if (!result) {
return ENOMEM;
}
TRY(m_directory_stack.try_append(move(m_current_directory)));
}
dbgln_if(ISO9660_VERY_DEBUG, "next(): Pushed into directory stack");

3
Kernel/Memory/AddressSpace.cpp
View file

@ -110,8 +110,7 @@ ErrorOr<void> AddressSpace::unmap_mmap_range(VirtualAddress addr, size_t size)
// Otherwise, split the regions and collect them for future mapping.
auto split_regions = TRY(try_split_region_around_range(*region, range_to_unmap));
if (new_regions.try_extend(split_regions))
return ENOMEM;
TRY(new_regions.try_extend(split_regions));
}
// Give back any unwanted VM to the range allocator.

3
Kernel/Net/LocalSocket.cpp
View file

@ -487,8 +487,7 @@ ErrorOr<void> LocalSocket::sendfd(OpenFileDescription const& socket_description,
// FIXME: Figure out how we should limit this properly.
if (queue.size() > 128)
return set_so_error(EBUSY);
if (!queue.try_append(move(passing_description)))
return set_so_error(ENOMEM);
SOCKET_TRY(queue.try_append(move(passing_description)));
return {};
}

3
Kernel/Net/Socket.cpp
View file

@ -71,8 +71,7 @@ ErrorOr<void> Socket::queue_connection_from(NonnullRefPtr<Socket> peer)
MutexLocker locker(mutex());
if (m_pending.size() >= m_backlog)
return set_so_error(ECONNREFUSED);
if (!m_pending.try_append(peer))
return set_so_error(ENOMEM);
SOCKET_TRY(m_pending.try_append(peer));
evaluate_block_conditions();
return {};
}

9
Kernel/Process.cpp
View file

@ -144,18 +144,15 @@ ErrorOr<NonnullRefPtr<Process>> Process::try_create_user_process(RefPtr<Thread>&
auto parts = path.split_view('/');
if (arguments.is_empty()) {
auto last_part = TRY(KString::try_create(parts.last()));
if (!arguments.try_append(move(last_part)))
return ENOMEM;
TRY(arguments.try_append(move(last_part)));
}
auto path_string = TRY(KString::try_create(path));
auto name = TRY(KString::try_create(parts.last()));
auto process = TRY(Process::try_create(first_thread, move(name), uid, gid, ProcessID(0), false, VirtualFileSystem::the().root_custody(), nullptr, tty));
if (!process->m_fds.try_resize(process->m_fds.max_open())) {
first_thread = nullptr;
return ENOMEM;
}
TRY(process->m_fds.try_resize(process->m_fds.max_open()));
auto& device_to_use_as_tty = tty ? (CharacterDevice&)*tty : DeviceManagement::the().null_device();
auto description = TRY(device_to_use_as_tty.open(O_RDWR));
auto setup_description = [&process, &description](int fd) {

5
Kernel/Process.h
View file

@ -641,8 +641,7 @@ public:
ErrorOr<void> try_clone(const Kernel::Process::OpenFileDescriptions& other)
{
SpinlockLocker lock_other(other.m_fds_lock);
if (!try_resize(other.m_fds_metadatas.size()))
return ENOMEM;
TRY(try_resize(other.m_fds_metadatas.size()));
for (size_t i = 0; i < other.m_fds_metadatas.size(); ++i) {
m_fds_metadatas[i] = other.m_fds_metadatas[i];
@ -662,7 +661,7 @@ public:
ErrorOr<ScopedDescriptionAllocation> allocate(int first_candidate_fd = 0);
size_t open_count() const;
bool try_resize(size_t size) { return m_fds_metadatas.try_resize(size); }
ErrorOr<void> try_resize(size_t size) { return m_fds_metadatas.try_resize(size); }
size_t max_open() const
{

15
Kernel/Syscalls/execve.cpp
View file

@ -100,15 +100,13 @@ static ErrorOr<FlatPtr> make_userspace_context_for_main_thread([[maybe_unused]]
Vector<FlatPtr> argv_entries;
for (auto& argument : arguments) {
push_string_on_new_stack(argument.view());
if (!argv_entries.try_append(new_sp))
return ENOMEM;
TRY(argv_entries.try_append(new_sp));
}
Vector<FlatPtr> env_entries;
for (auto& variable : environment) {
push_string_on_new_stack(variable.view());
if (!env_entries.try_append(new_sp))
return ENOMEM;
TRY(env_entries.try_append(new_sp));
}
for (auto& value : auxiliary_values) {
@ -810,8 +808,7 @@ ErrorOr<void> Process::exec(NonnullOwnPtr<KString> path, NonnullOwnPtrVector<KSt
auto shebang_words = shebang_result.release_value();
auto shebang_path = TRY(shebang_words.first().try_clone());
arguments.ptr_at(0) = move(path);
if (!arguments.try_prepend(move(shebang_words)))
return ENOMEM;
TRY(arguments.try_prepend(move(shebang_words)));
return exec(move(shebang_path), move(arguments), move(environment), ++recursion_depth);
}
@ -881,13 +878,11 @@ ErrorOr<FlatPtr> Process::sys$execve(Userspace<const Syscall::SC_execve_params*>
if (size.has_overflow())
return EOVERFLOW;
Vector<Syscall::StringArgument, 32> strings;
if (!strings.try_resize(list.length))
return ENOMEM;
TRY(strings.try_resize(list.length));
TRY(copy_from_user(strings.data(), list.strings, size.value()));
for (size_t i = 0; i < list.length; ++i) {
auto string = TRY(try_copy_kstring_from_user(strings[i]));
if (!output.try_append(move(string)))
return ENOMEM;
TRY(output.try_append(move(string)));
}
return {};
};

8
Kernel/Syscalls/purge.cpp
View file

@ -27,8 +27,8 @@ ErrorOr<FlatPtr> Process::sys$purge(int mode)
if (vmobject.is_anonymous()) {
// In the event that the append fails, only attempt to continue
// the purge if we have already appended something successfully.
if (!vmobjects.try_append(static_cast<Memory::AnonymousVMObject&>(vmobject)) && vmobjects.is_empty()) {
result = ENOMEM;
if (auto append_result = vmobjects.try_append(static_cast<Memory::AnonymousVMObject&>(vmobject)); append_result.is_error() && vmobjects.is_empty()) {
result = append_result.release_error();
return IterationDecision::Break;
}
}
@ -50,8 +50,8 @@ ErrorOr<FlatPtr> Process::sys$purge(int mode)
if (vmobject.is_inode()) {
// In the event that the append fails, only attempt to continue
// the purge if we have already appended something successfully.
if (!vmobjects.try_append(static_cast<Memory::InodeVMObject&>(vmobject)) && vmobjects.is_empty()) {
result = ENOMEM;
if (auto append_result = vmobjects.try_append(static_cast<Memory::InodeVMObject&>(vmobject)); append_result.is_error() && vmobjects.is_empty()) {
result = append_result.release_error();
return IterationDecision::Break;
}
}

3
Kernel/Syscalls/read.cpp
View file

@ -50,8 +50,7 @@ ErrorOr<FlatPtr> Process::sys$readv(int fd, Userspace<const struct iovec*> iov,
u64 total_length = 0;
Vector<iovec, 32> vecs;
if (!vecs.try_resize(iov_count))
return ENOMEM;
TRY(vecs.try_resize(iov_count));
TRY(copy_n_from_user(vecs.data(), iov, iov_count));
for (auto& vec : vecs) {
total_length += vec.iov_len;

12
Kernel/Syscalls/select.cpp
View file

@ -72,10 +72,8 @@ ErrorOr<FlatPtr> Process::sys$select(Userspace<const Syscall::SC_select_params*>
continue;
auto description = TRY(fds().open_file_description(fd));
if (!fds_info.try_append({ move(description), block_flags }))
return ENOMEM;
if (!selected_fds.try_append(fd))
return ENOMEM;
TRY(fds_info.try_append({ move(description), block_flags }));
TRY(selected_fds.try_append(fd));
}
if constexpr (IO_DEBUG || POLL_SELECT_DEBUG)
@ -146,8 +144,7 @@ ErrorOr<FlatPtr> Process::sys$poll(Userspace<const Syscall::SC_poll_params*> use
nfds_checked *= params.nfds;
if (nfds_checked.has_overflow())
return EFAULT;
if (!fds_copy.try_resize(params.nfds))
return ENOMEM;
TRY(fds_copy.try_resize(params.nfds));
TRY(copy_from_user(fds_copy.data(), &params.fds[0], nfds_checked.value()));
}
@ -162,8 +159,7 @@ ErrorOr<FlatPtr> Process::sys$poll(Userspace<const Syscall::SC_poll_params*> use
block_flags |= BlockFlags::Write;
if (pfd.events & POLLPRI)
block_flags |= BlockFlags::ReadPriority;
if (!fds_info.try_append({ move(description), block_flags }))
return ENOMEM;
TRY(fds_info.try_append({ move(description), block_flags }));
}
auto current_thread = Thread::current();

6
Kernel/Syscalls/setuid.cpp
View file

@ -169,8 +169,7 @@ ErrorOr<FlatPtr> Process::sys$setgroups(size_t count, Userspace<const gid_t*> us
}
Vector<gid_t> new_extra_gids;
if (!new_extra_gids.try_resize(count))
return ENOMEM;
TRY(new_extra_gids.try_resize(count));
TRY(copy_n_from_user(new_extra_gids.data(), user_gids, count));
HashTable<gid_t> unique_extra_gids;
@ -180,8 +179,7 @@ ErrorOr<FlatPtr> Process::sys$setgroups(size_t count, Userspace<const gid_t*> us
}
ProtectedDataMutationScope scope { *this };
if (!m_protected_values.extra_gids.try_resize(unique_extra_gids.size()))
return ENOMEM;
TRY(m_protected_values.extra_gids.try_resize(unique_extra_gids.size()));
size_t i = 0;
for (auto& extra_gid : unique_extra_gids) {
if (extra_gid == gid())

6
Kernel/Syscalls/socket.cpp
View file

@ -168,8 +168,7 @@ ErrorOr<FlatPtr> Process::sys$sendmsg(int sockfd, Userspace<const struct msghdr*
if (msg.msg_iovlen != 1)
return ENOTSUP; // FIXME: Support this :)
Vector<iovec, 1> iovs;
if (!iovs.try_resize(msg.msg_iovlen))
return ENOMEM;
TRY(iovs.try_resize(msg.msg_iovlen));
TRY(copy_n_from_user(iovs.data(), msg.msg_iov, msg.msg_iovlen));
if (iovs[0].iov_len > NumericLimits<ssize_t>::max())
return EINVAL;
@ -201,8 +200,7 @@ ErrorOr<FlatPtr> Process::sys$recvmsg(int sockfd, Userspace<struct msghdr*> user
if (msg.msg_iovlen != 1)
return ENOTSUP; // FIXME: Support this :)
Vector<iovec, 1> iovs;
if (!iovs.try_resize(msg.msg_iovlen))
return ENOMEM;
TRY(iovs.try_resize(msg.msg_iovlen));
TRY(copy_n_from_user(iovs.data(), msg.msg_iov, msg.msg_iovlen));
Userspace<sockaddr*> user_addr((FlatPtr)msg.msg_name);

3
Kernel/Syscalls/write.cpp
View file

@ -24,8 +24,7 @@ ErrorOr<FlatPtr> Process::sys$writev(int fd, Userspace<const struct iovec*> iov,
u64 total_length = 0;
Vector<iovec, 32> vecs;
if (!vecs.try_resize(iov_count))
return ENOMEM;
TRY(vecs.try_resize(iov_count));
TRY(copy_n_from_user(vecs.data(), iov, iov_count));
for (auto& vec : vecs) {
total_length += vec.iov_len;