| /* |
| * Copyright (c) 2014-2019, Intel Corporation |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * * Neither the name of Intel Corporation nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef PT_SYNC_H |
| #define PT_SYNC_H |
| |
| #include <stdint.h> |
| |
| struct pt_config; |
| |
| |
| /* Synchronize onto the trace stream. |
| * |
| * Search for the next synchronization point in forward or backward direction |
| * starting at @pos using the trace configuration @config. |
| * |
| * On success, stores a pointer to the next synchronization point in @sync. |
| * |
| * Returns zero on success, a negative error code otherwise. |
| * |
| * Returns -pte_internal if @sync, @pos, or @config is NULL. |
| * Returns -pte_nosync if @pos lies outside of @config's buffer. |
| * Returns -pte_eos if no further synchronization point is found. |
| */ |
| extern int pt_sync_forward(const uint8_t **sync, const uint8_t *pos, |
| const struct pt_config *config); |
| extern int pt_sync_backward(const uint8_t **sync, const uint8_t *pos, |
| const struct pt_config *config); |
| |
| /* Manually synchronize onto the trace stream. |
| * |
| * Validate that @pos is within the bounds of @config's trace buffer and that |
| * there is a synchronization point at @pos. |
| * |
| * On success, stores @pos in @sync. |
| * |
| * Returns zero on success, a negative error code otherwise. |
| * |
| * Returns -pte_eos if @pos is outside of @config's trace buffer. |
| * Returns -pte_internal if @sync, @pos, or @config is NULL. |
| * Returns -pte_bad_packet if there is no PSB at @pos. |
| */ |
| extern int pt_sync_set(const uint8_t **sync, const uint8_t *pos, |
| const struct pt_config *config); |
| |
| #endif /* PT_SYNC_H */ |