74fe6c29fb
vendor/processor-trace/24982c1a6fce48f1e416461d42899805f74fbb26 Sponsored by: DARPA, AFRL
72 lines
2.9 KiB
C
72 lines
2.9 KiB
C
/*
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* Copyright (c) 2014-2018, 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_SYNC_H
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#define PT_SYNC_H
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#include <stdint.h>
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struct pt_config;
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/* Synchronize onto the trace stream.
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*
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* Search for the next synchronization point in forward or backward direction
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* starting at @pos using the trace configuration @config.
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*
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* On success, stores a pointer to the next synchronization point in @sync.
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*
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* Returns zero on success, a negative error code otherwise.
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*
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* Returns -pte_internal if @sync, @pos, or @config is NULL.
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* Returns -pte_nosync if @pos lies outside of @config's buffer.
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* Returns -pte_eos if no further synchronization point is found.
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*/
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extern int pt_sync_forward(const uint8_t **sync, const uint8_t *pos,
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const struct pt_config *config);
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extern int pt_sync_backward(const uint8_t **sync, const uint8_t *pos,
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const struct pt_config *config);
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/* Manually synchronize onto the trace stream.
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*
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* Validate that @pos is within the bounds of @config's trace buffer and that
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* there is a synchronization point at @pos.
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*
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* On success, stores @pos in @sync.
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*
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* Returns zero on success, a negative error code otherwise.
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*
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* Returns -pte_eos if @pos is outside of @config's trace buffer.
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* Returns -pte_internal if @sync, @pos, or @config is NULL.
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* Returns -pte_bad_packet if there is no PSB at @pos.
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*/
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extern int pt_sync_set(const uint8_t **sync, const uint8_t *pos,
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const struct pt_config *config);
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#endif /* PT_SYNC_H */
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