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LibJS: Handle possible allocation failure in ArrayBuffer(size_t)

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...by replacing it with a ctor that takes the buffer instead, and
handling the allocation failure in ArrayBuffer::create(size_t) by
throwing a RangeError as specified by the spec.
This commit is contained in:
Ali Mohammad Pur 2021-09-05 14:43:15 +04:30 • committed by Andreas Kling
parent d20fc922c5
commit 7589cc2494
5 changed files with 22 additions and 6 deletions
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11
Userland/Libraries/LibJS/Runtime/ArrayBuffer.cpp
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@ -11,7 +11,12 @@ namespace JS {
ArrayBuffer* ArrayBuffer::create(GlobalObject& global_object, size_t byte_size)
{
return global_object.heap().allocate<ArrayBuffer>(global_object, byte_size, *global_object.array_buffer_prototype());
auto buffer = ByteBuffer::create_zeroed(byte_size);
if (!buffer.has_value()) {
global_object.vm().throw_exception<RangeError>(global_object, ErrorType::NotEnoughMemoryToAllocate, byte_size);
return nullptr;
}
return global_object.heap().allocate<ArrayBuffer>(global_object, buffer.release_value(), *global_object.array_buffer_prototype());
}
ArrayBuffer* ArrayBuffer::create(GlobalObject& global_object, ByteBuffer* buffer)
@ -19,9 +24,9 @@ ArrayBuffer* ArrayBuffer::create(GlobalObject& global_object, ByteBuffer* buffer
return global_object.heap().allocate<ArrayBuffer>(global_object, buffer, *global_object.array_buffer_prototype());
}
ArrayBuffer::ArrayBuffer(size_t byte_size, Object& prototype)
ArrayBuffer::ArrayBuffer(ByteBuffer buffer, Object& prototype)
: Object(prototype)
, m_buffer(ByteBuffer::create_zeroed(byte_size).release_value()) // FIXME: Handle this possible OOM failure.
, m_buffer(move(buffer))
, m_detach_key(js_undefined())
{
}