1/* libunwind - a platform-independent unwind library 2 Copyright (C) 2002-2005 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 4 5This file is part of libunwind. 6 7Permission is hereby granted, free of charge, to any person obtaining 8a copy of this software and associated documentation files (the 9"Software"), to deal in the Software without restriction, including 10without limitation the rights to use, copy, modify, merge, publish, 11distribute, sublicense, and/or sell copies of the Software, and to 12permit persons to whom the Software is furnished to do so, subject to 13the following conditions: 14 15The above copyright notice and this permission notice shall be 16included in all copies or substantial portions of the Software. 17 18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 22LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 25 26#include "libunwind_i.h" 27 28PROTECTED void 29unw_flush_cache (unw_addr_space_t as, unw_word_t lo, unw_word_t hi) 30{ 31 struct unw_debug_frame_list *w = as->debug_frames; 32 33 /* clear dyn_info_list_addr cache: */ 34 as->dyn_info_list_addr = 0; 35 36 for (; w; w = w->next) 37 { 38 if (w->index) 39 free (w->index); 40 free (w->debug_frame); 41 } 42 as->debug_frames = NULL; 43 44 /* This lets us flush caches lazily. The implementation currently 45 ignores the flush range arguments (lo-hi). This is OK because 46 unw_flush_cache() is allowed to flush more than the requested 47 range. */ 48 49#ifdef HAVE_FETCH_AND_ADD 50 fetch_and_add1 (&as->cache_generation); 51#else 52# warning unw_flush_cache(): need a way to atomically increment an integer. 53 ++as->cache_generation; 54#endif 55} 56