kopia lustrzana https://github.com/micropython/micropython
76 wiersze
3.0 KiB
C
76 wiersze
3.0 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2024 Angus Gratton
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef MICROPY_INCLUDED_PY_GC_VALGRIND_H
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#define MICROPY_INCLUDED_PY_GC_VALGRIND_H
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// This header is intended for including into gc.c directly.
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//
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// Defining some helper macros here helps keep valgrind integration in gc.c
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// as unobtrusive as possible.
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#include "py/mpconfig.h"
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#if MICROPY_DEBUG_VALGRIND
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#include <valgrind/memcheck.h>
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// MicroPython heap only knows size of an allocation in blocks,
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// this function queries valgrind (if enabled) to tell us the size
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// in bytes.
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static size_t valgrind_get_alloc_sz(void *p, size_t num_blocks) {
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size_t max_bytes = num_blocks * BYTES_PER_BLOCK;
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VALGRIND_DISABLE_ERROR_REPORTING; // Checking reports an error otherwise
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uintptr_t first_invalid = VALGRIND_CHECK_MEM_IS_ADDRESSABLE(p, max_bytes);
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VALGRIND_ENABLE_ERROR_REPORTING;
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return first_invalid ? (first_invalid - (uintptr_t)p) : max_bytes;
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}
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// Note: Currently we tell valgrind that the memory is zeroed if MICROPY_GC_CONSERVATIVE_CLEAR
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// is set. Running with this unset results in a lot of valgrind errors!
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#define VALGRIND_MP_MALLOC(PTR, LEN_BYTES) \
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VALGRIND_MALLOCLIKE_BLOCK((PTR), (LEN_BYTES), 0, MICROPY_GC_CONSERVATIVE_CLEAR);
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// Tell valgrind the block at PTR was OLD_NUM_BLOCKS in length, now NEW_LEN_BYTES in length
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#define VALGRIND_MP_RESIZE_BLOCK(PTR, OLD_NUM_BLOCKS, NEW_LEN_BYTES) \
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VALGRIND_RESIZEINPLACE_BLOCK((PTR), valgrind_get_alloc_sz((PTR), (OLD_NUM_BLOCKS)), NEW_LEN_BYTES, 0)
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#define VALGRIND_MP_FREE(PTR) VALGRIND_FREELIKE_BLOCK((PTR), 0)
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#else // MICROPY_DEBUG_VALGRIND
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// No-op definitions
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#define VALGRIND_MP_MALLOC(...)
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#define VALGRIND_MP_RESIZE_BLOCK(...)
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#define VALGRIND_MP_FREE(...)
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#define VALGRIND_RESIZEINPLACE_BLOCK(...)
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#define VALGRIND_MAKE_MEM_UNDEFINED(...)
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#define VALGRIND_MAKE_MEM_NOACCESS(...)
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#endif // MICROPY_DEBUG_VALGRIND
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#endif // MICROPY_INCLUDED_PY_GC_VALGRIND_H
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