| Elliott Hughes | 28e98bc | 2018-06-14 16:59:04 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Unwinder backends interface. |
| 3 | * |
| 4 | * Copyright (c) 2013 Luca Clementi <luca.clementi@gmail.com> |
| 5 | * Copyright (c) 2013-2018 The strace developers. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #ifndef STRACE_UNWIND_H |
| 31 | #define STRACE_UNWIND_H |
| 32 | |
| 33 | #include "defs.h" |
| 34 | |
| 35 | /* |
| 36 | * Type used in stacktrace walker. |
| 37 | */ |
| 38 | |
| 39 | /* This storage be enough large to store unw_word_t. */ |
| 40 | typedef unsigned long unwind_function_offset_t; |
| 41 | |
| 42 | typedef void (*unwind_call_action_fn)(void *data, |
| 43 | const char *binary_filename, |
| 44 | const char *symbol_name, |
| 45 | unwind_function_offset_t function_offset, |
| 46 | unsigned long true_offset); |
| 47 | typedef void (*unwind_error_action_fn)(void *data, |
| 48 | const char *error, |
| 49 | unsigned long true_offset); |
| 50 | |
| 51 | struct unwind_unwinder_t { |
| 52 | const char *name; |
| 53 | |
| 54 | /* Initialize the unwinder. */ |
| 55 | void (*init)(void); |
| 56 | |
| 57 | /* Make/destroy the context data attached to tcb. */ |
| 58 | void * (*tcb_init)(struct tcb *); |
| 59 | void (*tcb_fin)(struct tcb *); |
| 60 | |
| 61 | /* Walk the stack. */ |
| 62 | void (*tcb_walk)(struct tcb *, |
| 63 | unwind_call_action_fn, |
| 64 | unwind_error_action_fn, |
| 65 | void *); |
| Elliott Hughes | 28e98bc | 2018-06-14 16:59:04 -0700 | [diff] [blame] | 66 | }; |
| 67 | |
| 68 | extern const struct unwind_unwinder_t unwinder; |
| 69 | |
| 70 | #endif /* !STRACE_UNWIND_H */ |