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/*
* Unwinder backends interface.
*
* Copyright (c) 2013 Luca Clementi <luca.clementi@gmail.com>
* Copyright (c) 2013-2021 The strace developers.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifndef STRACE_UNWIND_H
# define STRACE_UNWIND_H
# include "defs.h"
/*
* Type used in stacktrace walker.
*/
/* This storage be enough large to store unw_word_t. */
typedef unsigned long unwind_function_offset_t;
typedef void (*unwind_call_action_fn)(void *data,
const char *binary_filename,
const char *symbol_name,
unwind_function_offset_t function_offset,
unsigned long true_offset);
typedef void (*unwind_error_action_fn)(void *data,
const char *error,
unsigned long true_offset);
struct unwind_unwinder_t {
const char *name;
/* Initialize the unwinder. */
void (*init)(void);
/* Make/destroy the context data attached to tcb. */
void * (*tcb_init)(struct tcb *);
void (*tcb_fin)(struct tcb *);
/* Walk the stack. */
void (*tcb_walk)(struct tcb *,
unwind_call_action_fn,
unwind_error_action_fn,
void *);
};
extern const struct unwind_unwinder_t unwinder;
#endif /* !STRACE_UNWIND_H */
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