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SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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#include <Kernel/Debug.h>
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#define KMALLOC_SCRUB_BYTE 0xbb
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#define KFREE_SCRUB_BYTE 0xaa
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#define MAKE_ALIGNED_ALLOCATED(type, alignment) \
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public: \
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void* operator new(size_t) { return kmalloc_aligned<alignment>(sizeof(type)); } \
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void operator delete(void* ptr) { kfree_aligned(ptr); } \
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\
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private:
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void kmalloc_init();
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[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc_impl(size_t);
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[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc_eternal(size_t);
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void* krealloc(void*, size_t);
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void kfree(void*);
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struct kmalloc_stats {
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size_t bytes_allocated;
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size_t bytes_free;
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size_t bytes_eternal;
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size_t kmalloc_call_count;
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size_t kfree_call_count;
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};
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void get_kmalloc_stats(kmalloc_stats&);
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extern bool g_dump_kmalloc_stacks;
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inline void* operator new(size_t, void* p) { return p; }
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inline void* operator new[](size_t, void* p) { return p; }
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[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc(size_t);
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template<size_t ALIGNMENT>
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[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] inline void* kmalloc_aligned(size_t size)
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{
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static_assert(ALIGNMENT > sizeof(ptrdiff_t));
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static_assert(ALIGNMENT <= 4096);
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void* ptr = kmalloc(size + ALIGNMENT + sizeof(ptrdiff_t));
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size_t max_addr = (size_t)ptr + ALIGNMENT;
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void* aligned_ptr = (void*)(max_addr - (max_addr % ALIGNMENT));
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((ptrdiff_t*)aligned_ptr)[-1] = (ptrdiff_t)((u8*)aligned_ptr - (u8*)ptr);
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return aligned_ptr;
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}
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inline void kfree_aligned(void* ptr)
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{
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kfree((u8*)ptr - ((const ptrdiff_t*)ptr)[-1]);
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}
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void kmalloc_enable_expand();
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