Add kernel virtual address space usage debug information.
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f636b310f6
commit
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3 changed files with 37 additions and 2 deletions
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2013, 2014 Jonas 'Sortie' Termansen.
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* Copyright (c) 2013, 2014, 2022 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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@ -29,6 +29,7 @@
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namespace Sortix {
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size_t aux_allocated = 0;
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size_t aux_leaked = 0;
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size_t heap_allocated = 0;
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kthread_mutex_t alloc_lock = KTHREAD_MUTEX_INITIALIZER;
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@ -69,6 +70,8 @@ void FreeKernelAddress(addralloc_t* alloc)
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addr_t aux_reached = kmem_from + kmem_size - aux_allocated;
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if ( alloc->from == aux_reached )
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aux_allocated -= alloc->size;
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else
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aux_leaked += alloc->size;
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alloc->from = 0;
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alloc->size = 0;
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@ -98,6 +101,17 @@ void ShrinkHeap(size_t decrease)
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heap_allocated -= decrease;
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}
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void KernelAddressStatistics(size_t* heap, size_t* aux, size_t* leaked,
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size_t* total)
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{
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ScopedLock lock(&alloc_lock);
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addr_t kmem_from;
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Memory::GetKernelVirtualArea(&kmem_from, total);
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*heap = heap_allocated;
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*aux = aux_allocated - aux_leaked;
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*leaked = aux_leaked;
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}
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// No need for locks in these three functions, since only the heap calls these
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// and it already uses an internal lock, and heap_allocated will not change
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// unless the heap calls ExpandHeap.
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2013 Jonas 'Sortie' Termansen.
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* Copyright (c) 2013, 2022 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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@ -39,6 +39,7 @@ void ShrinkHeap(size_t decrease);
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addr_t GetHeapLower();
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addr_t GetHeapUpper();
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size_t GetHeapSize();
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void KernelAddressStatistics(size_t* heap, size_t* aux, size_t* leaked, size_t* total);
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} // namespace Sortix
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@ -57,6 +57,26 @@ ssize_t sys_kernelinfo(const char* user_req, char* user_resp, size_t resplen)
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if ( !req )
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return -1;
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// DEBUG
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if ( !strcmp(req, "virtual-usage") )
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{
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delete[] req;
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size_t heap;
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size_t aux;
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size_t leaked;
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size_t total;
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KernelAddressStatistics(&heap, &aux, &leaked, &total);
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char str[4 * (20 + 3 * sizeof(size_t) + 1 + 8)];
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snprintf(str, sizeof(str),
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"%20zu B heap\n%20zu B aux\n%20zu B leaked\n%20zu B total",
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heap, aux, leaked, total);
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size_t stringlen = strlen(str);
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if ( resplen < stringlen + 1 )
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return errno = ERANGE, (ssize_t) stringlen;
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if ( !CopyToUser(user_resp, str, sizeof(char) * (stringlen + 1)) )
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return -1;
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return 0;
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}
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// DEBUG
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if ( !strcmp(req, "tcp") )
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{
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delete[] req;
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