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buflib: Add malloc-backed buflib

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This is intended for improving the effectiveness of tools like
ASAN when debugging memory errors in the sim. It's not meant to
be a serious allocator for hosted targets.

Enable it by changing the buflib backend in config.h.

Change-Id: I0cf23cefa47ee35dede7b49e0e5b72dac60e8d3e
This commit is contained in:
Aidan MacDonald 2023-01-02 22:48:07 +00:00
parent f2f198663e
commit 92565e9246
5 changed files with 309 additions and 0 deletions
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53
firmware/include/buflib_malloc.h Normal file
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@ -0,0 +1,53 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2023 Aidan MacDonald
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _BUFLIB_MALLOC_H_
#define _BUFLIB_MALLOC_H_
#ifndef _BUFLIB_H_
# error "include buflib.h instead"
#endif
struct buflib_malloc_handle
{
void *data;
void *user;
size_t size;
unsigned int pin_count;
struct buflib_callbacks *ops;
};
struct buflib_context
{
struct buflib_malloc_handle *allocs;
size_t num_allocs;
void *buf;
size_t bufsize;
};
#ifndef BUFLIB_DEBUG_GET_DATA
static inline void *buflib_get_data(struct buflib_context *ctx, int handle)
{
return ctx->allocs[handle - 1].user;
}
#endif
#endif /* _BUFLIB_MALLOC_H_ */