lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* __frame_state_for unwinder helper function wrapper. |
| 2 | Copyright (C) 2001-2015 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2001. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include <dlfcn.h> |
| 21 | #include <stdlib.h> |
| 22 | #define STATIC static |
| 23 | #define __frame_state_for fallback_frame_state_for |
| 24 | #include <unwind-dw2.c> |
| 25 | #undef __frame_state_for |
| 26 | #include <gnu/lib-names.h> |
| 27 | |
| 28 | typedef struct frame_state * (*framesf)(void *pc, struct frame_state *); |
| 29 | struct frame_state *__frame_state_for (void *pc, |
| 30 | struct frame_state *frame_state); |
| 31 | |
| 32 | struct frame_state * |
| 33 | __frame_state_for (void *pc, struct frame_state *frame_state) |
| 34 | { |
| 35 | static framesf frame_state_for; |
| 36 | |
| 37 | if (frame_state_for == NULL) |
| 38 | { |
| 39 | void *handle = __libc_dlopen (LIBGCC_S_SO); |
| 40 | |
| 41 | if (handle == NULL |
| 42 | || (frame_state_for |
| 43 | = (framesf) __libc_dlsym (handle, "__frame_state_for")) == NULL) |
| 44 | #ifndef __USING_SJLJ_EXCEPTIONS__ |
| 45 | frame_state_for = fallback_frame_state_for; |
| 46 | #else |
| 47 | frame_state_for = abort; |
| 48 | #endif |
| 49 | } |
| 50 | |
| 51 | return frame_state_for (pc, frame_state); |
| 52 | } |