ladybird/Kernel/kmalloc.h
Andreas Kling d384c7815f Kernel: Make it possible to have kmalloc() dump call stacks.
This can be enabled at any time using a sysctl:

    sysctl kmalloc_stacks=1

The stacks will go to the debugger output only.
2019-04-15 23:58:48 +02:00

37 lines
1.2 KiB
C

#pragma once
#include <AK/Types.h>
//#define KMALLOC_DEBUG_LARGE_ALLOCATIONS
void kmalloc_init();
[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc_impl(size_t);
[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc_eternal(size_t);
[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc_page_aligned(size_t);
[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc_aligned(size_t, size_t alignment);
void kfree(void*);
void kfree_aligned(void*);
bool is_kmalloc_address(const void*);
extern volatile size_t sum_alloc;
extern volatile size_t sum_free;
extern volatile size_t kmalloc_sum_eternal;
extern volatile size_t kmalloc_sum_page_aligned;
extern dword g_kmalloc_call_count;
extern dword g_kfree_call_count;
extern bool g_dump_kmalloc_stacks;
inline void* operator new(size_t, void* p) { return p; }
inline void* operator new[](size_t, void* p) { return p; }
[[gnu::always_inline]] inline void* kmalloc(size_t size)
{
#ifdef KMALLOC_DEBUG_LARGE_ALLOCATIONS
// Any kernel allocation >= 1M is 99.9% a bug.
if (size >= 1048576)
asm volatile("cli;hlt");
#endif
return kmalloc_impl(size);
}