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
5 This file is part of libunwind.
6
7 Permission is hereby granted, free of charge, to any person obtaining
8 a copy of this software and associated documentation files (the
9 "Software"), to deal in the Software without restriction, including
10 without limitation the rights to use, copy, modify, merge, publish,
11 distribute, sublicense, and/or sell copies of the Software, and to
12 permit persons to whom the Software is furnished to do so, subject to
13 the following conditions:
14
15 The above copyright notice and this permission notice shall be
16 included in all copies or substantial portions of the Software.
17
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
25
26 #include "libunwind_i.h"
27
28 PROTECTED void
unw_flush_cache(unw_addr_space_t as,unw_word_t lo,unw_word_t hi)29 unw_flush_cache (unw_addr_space_t as, unw_word_t lo, unw_word_t hi)
30 {
31 #if !UNW_TARGET_IA64
32 struct unw_debug_frame_list *w = as->debug_frames;
33 #endif
34
35 /* clear dyn_info_list_addr cache: */
36 as->dyn_info_list_addr = 0;
37
38 #if !UNW_TARGET_IA64
39 for (; w; w = w->next)
40 {
41 if (w->index)
42 free (w->index);
43 free (w->debug_frame);
44 }
45 as->debug_frames = NULL;
46 #endif
47
48 /* This lets us flush caches lazily. The implementation currently
49 ignores the flush range arguments (lo-hi). This is OK because
50 unw_flush_cache() is allowed to flush more than the requested
51 range. */
52
53 #ifdef HAVE_FETCH_AND_ADD
54 fetch_and_add1 (&as->cache_generation);
55 #else
56 # warning unw_flush_cache(): need a way to atomically increment an integer.
57 ++as->cache_generation;
58 #endif
59 }
60