c27a7c453c
vendor/processor-trace/24982c1a6fce48f1e416461d42899805f74fbb26 Sponsored by: DARPA, AFRL
89 lines
3.1 KiB
C
89 lines
3.1 KiB
C
/*
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* Copyright (c) 2013-2018, Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef PT_TNT_CACHE_H
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#define PT_TNT_CACHE_H
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#include <stdint.h>
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struct pt_packet_tnt;
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struct pt_config;
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/* Keeping track of tnt indicators. */
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struct pt_tnt_cache {
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/* The last tnt. */
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uint64_t tnt;
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/* The index into the above tnt.
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*
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* (tnt & index) gives the current tnt entry.
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* (index >>= 1) moves the index to the next tnt entry.
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* (index == 0) means that the current tnt is empty.
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*/
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uint64_t index;
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};
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/* Initialize (or reset) the tnt cache. */
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extern void pt_tnt_cache_init(struct pt_tnt_cache *cache);
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/* Check if the tnt cache is empty.
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*
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* Returns 0 if the tnt cache is not empty.
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* Returns > 0 if the tnt cache is empty.
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* Returns -pte_invalid if @cache is NULL.
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*/
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extern int pt_tnt_cache_is_empty(const struct pt_tnt_cache *cache);
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/* Query the next tnt indicator.
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*
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* This consumes the returned tnt indicator in the cache.
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*
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* Returns 0 if the next branch is not taken.
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* Returns > 0 if the next branch is taken.
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* Returns -pte_invalid if @cache is NULL.
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* Returns -pte_bad_query if there is no tnt cached.
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*/
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extern int pt_tnt_cache_query(struct pt_tnt_cache *cache);
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/* Update the tnt cache based on Intel PT packets.
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*
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* Updates @cache based on @packet and, if non-null, @config.
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*
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* Returns zero on success.
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* Returns -pte_invalid if @cache or @packet is NULL.
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* Returns -pte_bad_packet if @packet appears to be corrupted.
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* Returns -pte_bad_context if the tnt cache is not empty.
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*/
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extern int pt_tnt_cache_update_tnt(struct pt_tnt_cache *cache,
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const struct pt_packet_tnt *packet,
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const struct pt_config *config);
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#endif /* PT_TNT_CACHE_H */
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