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5491e0cdcc
ladybird/AK
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Daniel Bertalan 5491e0cdcc AK+Kernel: Make fallible allocations compiler-agnostic 
In standard C++, operators `new` and `new[]` are guaranteed to return a
valid (non-null) pointer and throw an exception if the allocation
couldn't be performed. Based on this, compilers did not check the
returned pointer before attempting to use them for object construction.

To avoid this, the allocator operators were changed to be `noexcept` in
PR #7026, which made GCC emit the desired null checks. Unfortunately,
this is a non-standard feature which meant that Clang would not accept
these function definitions, as it did not match its expected
declaration.

To make compiling using Clang possible, the special "nothrow" versions
of `new` are implemented in this commit. These take a tag type of
`std::nothrow_t` (used for disambiguating from placement new/etc.), and
are allowed by the standard to return null. There is a global variable,
`std::nothrow`, declared with this type, which is also exported into the
global namespace.

To perform fallible allocations, the following syntax should be used:

```cpp
auto ptr = new (nothrow) T;
```

As we don't support exceptions in the kernel, the only way of uphold the
"throwing" new's guarantee is to abort if the allocation couldn't be
performed. Once we have proper OOM handling in the kernel, this should
only be used for critical allocations, where we wouldn't be able to
recover from allocation failures anyway.
2021-06-24 17:35:49 +04:30
..
AllOf.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
AnyOf.h AK: Reimplement any_of in terms of find_if 2021-06-20 10:54:09 +01:00
Array.h AK: Export integer_sequence_generate_array() 2021-05-05 19:02:51 +02:00
Assertions.h LibC+AK: Remove our custom macros from <assert.h> 2021-06-08 17:29:57 +02:00
Atomic.h AK: Specialize Atomic<Integral> for clang compatibility 2021-06-24 17:35:49 +04:30
Badge.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Base64.cpp Meta: Disable -Wmaybe-uninitialized 2021-06-09 23:05:32 +04:30
Base64.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
BinaryHeap.h AK+Userland: Use idan.horowitz@serenityos.org for my copyright headers 2021-04-22 22:42:38 +02:00
BinarySearch.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
BitCast.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Bitmap.h Bitmap: De-duplicate bitmasks 2021-05-19 23:37:10 +01:00
BitmapView.h Bitmap: De-duplicate bitmasks 2021-05-19 23:37:10 +01:00
BitStream.h AK+Userland: Use idan.horowitz@serenityos.org for my copyright headers 2021-04-22 22:42:38 +02:00
Buffered.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
ByteBuffer.h AK: Add ByteBuffer::append(ReadonlyBytes) 2021-06-12 22:45:01 +04:30
ByteReader.h LibCrypto+LibTLS: Avoid unaligned reads and writes 2021-05-14 08:39:29 +01:00
CharacterTypes.h AK: Add the parse_ascii_base36_digit method 2021-06-06 01:34:22 +01:00
Checked.h AK: Make checked division also check for divide by zero 2021-06-02 16:09:16 +04:30
CheckedFormatString.h AK+Everywhere: Fix compiletime format parsing of replacement fields 2021-06-01 23:12:17 +04:30
CircularDeque.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
CircularDuplexStream.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
CircularQueue.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
CMakeLists.txt Meta: Add support for declaring components 2021-06-17 11:03:51 +02:00
Complex.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Concepts.h AK: Make C++ concepts support mandatory for compilers 2021-06-24 17:35:49 +04:30
Debug.h.in LibCoreDump: Include source locations of inlined functions in backtrace 2021-06-19 14:51:18 +02:00
Demangle.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
DistinctNumeric.h AK: Make DistinctNumeric constexpr-capable 2021-05-04 21:32:15 +02:00
DoublyLinkedList.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Endian.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
EnumBits.h Everywhere: Use bgianf@serenityos.org for my copyright attribution 2021-04-22 21:15:54 +02:00
ExtraMathConstants.h Userland: Move non-standard math constants from math.h 2021-04-27 23:06:16 +02:00
FileStream.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Find.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
FlyString.cpp AK: Add a way to disable the trimming of whitespace in to_*int 2021-06-18 19:18:15 +01:00
FlyString.h AK: Add a way to disable the trimming of whitespace in to_*int 2021-06-18 19:18:15 +01:00
Format.cpp AK: Add support for keeping trailing zeros in fixed precision floats 2021-06-19 16:13:59 +01:00
Format.h AK: Add support for keeping trailing zeros in fixed precision floats 2021-06-19 16:13:59 +01:00
Forward.h AK: Remove now unused InlineLinkedList class 2021-06-16 10:40:01 +02:00
Function.h AK+Everywhere: Disallow constructing Functions from incompatible types 2021-06-06 00:27:30 +04:30
GenericLexer.cpp AK/GenericLexer: constexpr where possible 2021-04-22 20:27:21 +02:00
GenericLexer.h AK/GenericLexer: constexpr where possible 2021-04-22 20:27:21 +02:00
HashFunctions.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
HashMap.h AK: Add a missing using AK::OrderedHashMap statement 2021-06-15 23:51:20 +01:00
HashTable.h AK: Add Ordering support to HashTable and HashMap 2021-06-15 22:16:55 +02:00
Hex.cpp Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Hex.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
IDAllocator.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
IntrusiveList.h AK+Tests: Add IntrusiveList<T,...>::insert_before(..) method 2021-06-16 10:40:01 +02:00
IntrusiveRedBlackTree.h Revert "AK: Remove virtual destructors from non-virtual classes" 2021-04-23 10:26:14 +02:00
IPv4Address.h AK: Implement IPv4Address::to_string_reversed() 2021-06-09 17:43:32 +04:30
IterationDecision.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Iterator.h AK: Make Vector capable of holding reference types 2021-06-08 19:14:24 +02:00
JsonArray.h AK: Fix argument type for JsonArray::at and JsonArray::operator[] 2021-04-26 17:13:55 +02:00
JsonArraySerializer.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
JsonObject.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
JsonObjectSerializer.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
JsonParser.cpp AK: Use move semantics to avoid copying in JSON parser 2021-05-14 11:54:43 +02:00
JsonParser.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
JsonPath.cpp Everywhere: Use "the SerenityOS developers." in copyright headers 2021-04-29 00:59:26 +02:00
JsonPath.h Everywhere: Use "the SerenityOS developers." in copyright headers 2021-04-29 00:59:26 +02:00
JsonValue.cpp AK: Remove unused JsonValue <=> IPv4Address conversion code 2021-06-03 11:56:32 +01:00
JsonValue.h AK: Remove unused JsonValue <=> IPv4Address conversion code 2021-06-03 11:56:32 +01:00
kmalloc.h AK+Kernel: Make fallible allocations compiler-agnostic 2021-06-24 17:35:49 +04:30
kstdio.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
LEB128.h AK: Handle LEB128 encoded values that are too large for the result type 2021-05-31 14:25:27 +04:30
LexicalPath.cpp LexicalPath: Reset dirname if it's empty 2021-05-27 18:21:36 +04:30
LexicalPath.h AK: Add LexicalPath::append and LexicalPath::join 2021-05-12 22:38:20 +02:00
MACAddress.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
MappedFile.cpp AK: Rename adopt() to adopt_ref() 2021-04-23 16:46:57 +02:00
MappedFile.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
MemMem.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Memory.h AK: Guard inline assembly with ARCH(I386) and provide alternative 2021-05-31 17:29:09 +01:00
MemoryStream.h Kernel+LibC: Make get_dir_entries syscall retriable 2021-05-12 12:50:23 +02:00
NeverDestroyed.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Noncopyable.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
NonnullOwnPtr.h AK+Kernel: Hide AK::adopt_own from usage in the Kernel 2021-05-29 09:04:05 +02:00
NonnullOwnPtrVector.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
NonnullPtrVector.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
NonnullRefPtr.h Kernel: Pull apart CPU.h 2021-06-24 00:38:23 +02:00
NonnullRefPtrVector.h AK: Make NonnullRefPtrVector constructible from Vector<NonnullRefPtr> 2021-06-11 00:30:09 +02:00
NumberFormat.h Everywhere: Use "the SerenityOS developers." in copyright headers 2021-04-29 00:59:26 +02:00
NumericLimits.h AK/NumericLimits: Add lowest() for floating-point types 2021-05-22 13:38:34 +01:00
Optional.h AK: Enable direct comparsion of Optional<T> and T 2021-06-01 11:38:17 +02:00
OSError.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
OwnPtr.h AK+Kernel: Disallow implicitly lifting pointers to OwnPtr's 2021-05-31 17:09:12 +04:30
Platform.h AK: Add platform macros to detect presence of AddressSanitizer 2021-05-28 07:59:41 +02:00
PrintfImplementation.h AK: Honor variable precision argument when formatting 2021-05-30 18:45:06 +01:00
Ptr32.h AK: Fix building Ptr32 on x86_64 2021-06-24 09:27:13 +02:00
Queue.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
QuickSort.h AK: Guarantee a maximum stack depth for dual_pivot_quick_sort 2021-04-28 21:38:48 +02:00
Random.cpp AK: Introduce get_random_uniform() 2021-05-14 22:24:02 +02:00
Random.h AK: Introduce get_random_uniform() 2021-05-14 22:24:02 +02:00
RedBlackTree.h AK: Add RedBlackTree::find_largest_not_above_iterator 2021-06-19 14:51:18 +02:00
RefCounted.h AK: Allow inlining ref-count functionality 2021-06-03 08:06:51 +02:00
RefPtr.h Kernel: Pull apart CPU.h 2021-06-24 00:38:23 +02:00
Result.h AK: Let Result<T, E> know its Value and Error types 2021-05-08 22:14:39 +02:00
ScopedValueRollback.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
ScopeGuard.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
ScopeLogger.h AK: Include String.h in ScopeLogger 2021-05-17 23:25:30 +02:00
SIMD.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Singleton.h Kernel: Pull apart CPU.h 2021-06-24 00:38:23 +02:00
SinglyLinkedList.h AK: Add support for removing SinglyLinkedList nodes during iteration 2021-06-15 23:59:21 +01:00
SinglyLinkedListWithCount.h Everywhere: Use bgianf@serenityos.org for my copyright attribution 2021-04-22 21:15:54 +02:00
SourceGenerator.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
SourceLocation.h AK+Userland: Use akaster@serenityos.org for my copyright headers 2021-05-30 14:35:34 +01:00
Span.h AK: Add a way to slice from the end of a span 2021-05-27 17:28:41 +04:30
Stack.h AK: Implement AK::Stack 2021-05-26 16:36:53 +04:30
StackInfo.cpp Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
StackInfo.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
StdLibExtraDetails.h AK+Everywhere: Disallow constructing Functions from incompatible types 2021-06-06 00:27:30 +04:30
StdLibExtras.h AK: Make {min,max,clamp}(T, U) work when U can be implicitly cast to T 2021-06-23 19:04:08 +02:00
Stream.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
String.cpp AK: Add a way to disable the trimming of whitespace in to_*int 2021-06-18 19:18:15 +01:00
String.h AK: Add a way to disable the trimming of whitespace in to_*int 2021-06-18 19:18:15 +01:00
StringBuilder.cpp AK: Remove the m_length member for StringBuilder 2021-05-31 14:49:00 +04:30
StringBuilder.h AK: Remove the m_length member for StringBuilder 2021-05-31 14:49:00 +04:30
StringHash.h AK: Make StringView::hash() constexpr 2021-05-14 15:24:32 +02:00
StringImpl.cpp AK: Include HashTable.h in StringImpl.cpp 2021-05-17 23:25:30 +02:00
StringImpl.h Revert "Revert "AK: Always inline FlyString::view()"" 2021-06-06 08:05:49 +01:00
StringUtils.cpp AK: Add a way to disable the trimming of whitespace in to_*int 2021-06-18 19:18:15 +01:00
StringUtils.h AK: Add a way to disable the trimming of whitespace in to_*int 2021-06-18 19:18:15 +01:00
StringView.cpp AK: Don’t drop lines between \r and \n in StringView::lines() (#7662) 2021-06-04 12:06:08 +04:30
StringView.h AK: Inline *String::is_one_of<Ts...>() 2021-06-04 12:57:14 +02:00
TemporaryChange.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Time.cpp Time: Remove static from function local constexpr variable 2021-05-19 16:24:02 +02:00
Time.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Traits.h AK: Add ConstPeekType to Traits 2021-05-08 18:10:56 +02:00
Trie.h AK: Add children() accessor to Trie 2021-06-08 12:15:04 +02:00
Tuple.h AK: Add deduction guides to Tuple 2021-05-18 18:48:15 +01:00
TypeCasts.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
TypedTransfer.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
TypeList.h Everywhere: "indexes" => "indices" 2021-04-29 22:23:52 +02:00
Types.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
UBSanitizer.h Kernel+AK: Move UBSanitizer to AK, and to AK namespace 2021-05-27 15:18:03 +02:00
UFixedBigInt.h AK+LibX86: Generalize u128/256 to AK::UFixedBigInt 2021-06-11 18:14:11 +04:30
UnicodeUtils.cpp AK: Add UnicodeUtils with Unicode-related helper functions 2021-05-20 22:10:45 +02:00
UnicodeUtils.h AK: Add UnicodeUtils with Unicode-related helper functions 2021-05-20 22:10:45 +02:00
URL.cpp Everywhere: Replace ctype.h to avoid narrowing conversions 2021-06-03 13:31:46 +02:00
URL.h AK: Move identity check from URL::operator==() to equals() 2021-06-01 12:23:16 +02:00
URLParser.cpp Userland: Allow building SerenityOS with -funsigned-char 2021-06-13 18:52:58 +02:00
URLParser.h AK: Make debugging URLParser easier 2021-06-05 10:53:31 +02:00
Userspace.h AK: Make C++ concepts support mandatory for compilers 2021-06-24 17:35:49 +04:30
Utf8View.cpp AK: Add the Utf8View::{contains, trim} helper methods 2021-06-16 20:05:18 +01:00
Utf8View.h AK: Add the Utf8View::{contains, trim} helper methods 2021-06-16 20:05:18 +01:00
Utf32View.h AK: Rename Utf32CodepointIterator => Utf32CodePointIterator 2021-06-01 09:46:19 +02:00
UUID.cpp AK+Userland: Fix some compiler warnings and make variables const-ref 2021-05-16 17:49:42 +02:00
UUID.h Everything: Move to SPDX license identifiers in all files. 2021-04-22 11:22:27 +02:00
Variant.h AK: Make a bunch of Variant methods ALWAYS_INLINE 2021-06-09 23:05:32 +04:30
Vector.h AK: Rename Vector::append(Vector) => Vector::extend(Vector) 2021-06-12 13:24:45 +02:00
Weakable.h Kernel: Pull apart CPU.h 2021-06-24 00:38:23 +02:00
WeakPtr.h AK: Rename adopt() to adopt_ref() 2021-04-23 16:46:57 +02:00