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// Copyright © Tavian Barnes <tavianator@tavianator.com>
// SPDX-License-Identifier: 0BSD
/**
* Sanitizer interface.
*/
#ifndef BFS_SANITY_H
#define BFS_SANITY_H
#include "config.h"
#include <stddef.h>
#if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
# define SANITIZE_ADDRESS true
#endif
#if __has_feature(memory_sanitizer) || defined(__SANITIZE_MEMORY__)
# define SANITIZE_MEMORY true
#endif
#if __has_feature(thread_sanitizer) || defined(__SANITIZE_THREAD__)
# define SANITIZE_THREAD true
#endif
// Call macro(ptr, size) or macro(ptr, sizeof(*ptr))
#define SANITIZE_CALL(...) \
SANITIZE_CALL_(__VA_ARGS__, )
#define SANITIZE_CALL_(macro, ptr, ...) \
SANITIZE_CALL__(macro, ptr, __VA_ARGS__ sizeof(*(ptr)), )
#define SANITIZE_CALL__(macro, ptr, size, ...) \
macro(ptr, size)
#if SANITIZE_ADDRESS
# include <sanitizer/asan_interface.h>
/**
* sanitize_alloc(ptr, size = sizeof(*ptr))
*
* Mark a memory region as allocated.
*/
#define sanitize_alloc(...) SANITIZE_CALL(__asan_unpoison_memory_region, __VA_ARGS__)
/**
* sanitize_free(ptr, size = sizeof(*ptr))
*
* Mark a memory region as free.
*/
#define sanitize_free(...) SANITIZE_CALL(__asan_poison_memory_region, __VA_ARGS__)
#else
# define sanitize_alloc sanitize_uninit
# define sanitize_free sanitize_uninit
#endif
#if SANITIZE_MEMORY
# include <sanitizer/msan_interface.h>
/**
* sanitize_init(ptr, size = sizeof(*ptr))
*
* Mark a memory region as initialized.
*/
#define sanitize_init(...) SANITIZE_CALL(__msan_unpoison, __VA_ARGS__)
/**
* sanitize_uninit(ptr, size = sizeof(*ptr))
*
* Mark a memory region as uninitialized.
*/
#define sanitize_uninit(...) SANITIZE_CALL(__msan_allocated_memory, __VA_ARGS__)
#else
# define sanitize_init(...) SANITIZE_CALL(sanitize_ignore, __VA_ARGS__)
# define sanitize_uninit(...) SANITIZE_CALL(sanitize_ignore, __VA_ARGS__)
#endif
/**
* Squelch unused variable warnings when not sanitizing.
*/
#define sanitize_ignore(ptr, size) ((void)(ptr), (void)(size))
/**
* Initialize a variable, unless sanitizers would detect uninitialized uses.
*/
#if SANITIZE_MEMORY
# define uninit(value)
#else
# define uninit(value) = value
#endif
#endif // BFS_SANITY_H
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