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3842dac733
reading of .debug_frame sections (used in lieu of .eh_frame sections when they're not available).
59 lines
2 KiB
C
59 lines
2 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2002-2005 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "libunwind_i.h"
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PROTECTED void
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unw_flush_cache (unw_addr_space_t as, unw_word_t lo, unw_word_t hi)
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{
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#if !UNW_TARGET_IA64
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struct unw_debug_frame_list *w = as->debug_frames;
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#endif
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/* clear dyn_info_list_addr cache: */
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as->dyn_info_list_addr = 0;
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#if !UNW_TARGET_IA64
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for (; w; w = w->next)
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{
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if (w->index)
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free (w->index);
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free (w->debug_frame);
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}
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as->debug_frames = NULL;
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#endif
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/* This lets us flush caches lazily. The implementation currently
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ignores the flush range arguments (lo-hi). This is OK because
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unw_flush_cache() is allowed to flush more than the requested
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range. */
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#ifdef HAVE_FETCH_AND_ADD1
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fetch_and_add1 (&as->cache_generation);
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#else
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# warning unw_flush_cache(): need a way to atomically increment an integer.
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++as->cache_generation;
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#endif
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}
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