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AK+Kernel: Specialize Trie for NNOP<KString> and use it in UnveilNode

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This let's us avoid the infallible String allocations.
This commit is contained in:
Idan Horowitz 2022-02-15 20:59:25 +02:00 • committed by Andreas Kling
parent 0218c62be4
commit 316fa0c3f3
6 changed files with 31 additions and 13 deletions
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1
Kernel/FileSystem/Inode.h
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@ -11,7 +11,6 @@
#include <AK/Function.h>
#include <AK/HashTable.h>
#include <AK/IntrusiveList.h>
#include <AK/String.h>
#include <AK/WeakPtr.h>
#include <Kernel/FileSystem/FIFO.h>
#include <Kernel/FileSystem/FileSystem.h>

1
Kernel/FileSystem/InodeWatcher.h
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@ -12,7 +12,6 @@
#include <AK/CircularQueue.h>
#include <AK/HashMap.h>
#include <AK/NonnullOwnPtr.h>
#include <AK/String.h>
#include <Kernel/API/InodeWatcherEvent.h>
#include <Kernel/FileSystem/File.h>
#include <Kernel/Forward.h>

6
Kernel/FileSystem/UnveilNode.h
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@ -6,8 +6,8 @@
#pragma once
#include <AK/String.h>
#include <AK/Trie.h>
#include <Kernel/KString.h>
namespace Kernel {
@ -49,8 +49,8 @@ struct UnveilMetadata {
}
};
struct UnveilNode final : public Trie<String, UnveilMetadata, Traits<String>, UnveilNode> {
using Trie<String, UnveilMetadata, Traits<String>, UnveilNode>::Trie;
struct UnveilNode final : public Trie<NonnullOwnPtr<KString>, UnveilMetadata, Traits<NonnullOwnPtr<KString>>, UnveilNode> {
using Trie<NonnullOwnPtr<KString>, UnveilMetadata, Traits<NonnullOwnPtr<KString>>, UnveilNode>::Trie;
bool was_explicitly_unveiled() const { return this->metadata_value().explicitly_unveiled; }
UnveilAccess permissions() const { return this->metadata_value().permissions; }

3
Kernel/Process.cpp
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@ -218,7 +218,8 @@ void Process::unprotect_data()
ErrorOr<NonnullRefPtr<Process>> Process::try_create(RefPtr<Thread>& first_thread, NonnullOwnPtr<KString> name, UserID uid, GroupID gid, ProcessID ppid, bool is_kernel_process, RefPtr<Custody> cwd, RefPtr<Custody> executable, TTY* tty, Process* fork_parent)
{
auto space = TRY(Memory::AddressSpace::try_create(fork_parent ? &fork_parent->address_space() : nullptr));
auto process = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) Process(move(name), uid, gid, ppid, is_kernel_process, move(cwd), move(executable), tty, UnveilNode { "/"sv, UnveilMetadata(TRY(KString::try_create("/"sv))) })));
auto unveil_tree = UnveilNode { TRY(KString::try_create("/"sv)), UnveilMetadata(TRY(KString::try_create("/"sv))) };
auto process = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) Process(move(name), uid, gid, ppid, is_kernel_process, move(cwd), move(executable), tty, move(unveil_tree))));
TRY(process->attach_resources(move(space), first_thread, fork_parent));
return process;
}

1
Kernel/Process.h
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@ -12,7 +12,6 @@
#include <AK/IntrusiveListRelaxedConst.h>
#include <AK/NonnullRefPtrVector.h>
#include <AK/OwnPtr.h>
#include <AK/String.h>
#include <AK/Userspace.h>
#include <AK/Variant.h>
#include <AK/WeakPtr.h>