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/*
* Unwinder backends interface.
*
* Copyright (c) 2013 Luca Clementi <luca.clementi@gmail.com>
* Copyright (c) 2013-2018 The strace developers.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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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