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/*
* Copyright (c) 2017-2025, Intel Corporation
* SPDX-License-Identifier: BSD-3-Clause
*
* 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_SB_PEVENT_H
#define PT_SB_PEVENT_H
#include "pevent.h"
/* The estimated code location. */
enum pt_sb_pevent_loc {
/* We do not know where we are. */
ploc_unknown,
/* We are in kernel space. */
ploc_in_kernel,
/* We are in user space. */
ploc_in_user,
/* We are likely in kernel space. */
ploc_likely_in_kernel,
/* We are likely in user space. */
ploc_likely_in_user
};
/* A Linux perf event decoder's private data. */
struct pt_sb_pevent_priv {
/* The sideband filename for printing.
*
* This is a copy of the filename provided by the user when allocating
* the sideband decoder.
*/
char *filename;
/* The optional system root directory.
*
* If not NULL, this is prepended to every filename referenced in perf
* event sideband records.
*
* This is a copy of the sysroot provided by the user when allocating
* the sideband decoder.
*/
char *sysroot;
/* The optional 64-bit vdso.
*
* If not NULL, this is used for [vdso] mmaps in 64-bit processes.
*
* This is a copy of the vdso filename provided by the user when
* allocating the sideband decoder.
*/
char *vdso_x64;
/* The optional x32 vdso.
*
* If not NULL, this is used for [vdso] mmaps in x32 processes.
*
* This is a copy of the vdso filename provided by the user when
* allocating the sideband decoder.
*/
char *vdso_x32;
/* The optional 32-bit vdso.
*
* If not NULL, this is used for [vdso] mmaps in 32-bit processes.
*
* This is a copy of the vdso filename provided by the user when
* allocating the sideband decoder.
*/
char *vdso_ia32;
/* The begin and end of the sideband data in memory. */
uint8_t *begin, *end;
/* The position of the current and the next record in the sideband
* buffer.
*
* The current position is the position of @event or NULL.
* the next position is the position from which to fetch.
*/
const uint8_t *current, *next;
/* The libpevent configuration. */
struct pev_config pev;
/* The current perf event record. */
struct pev_event event;
/* The current process context.
*
* This is NULL if there is no current context.
* Otherwise, holds a reference to @context (put after use).
*/
struct pt_sb_context *context;
/* The next process context.
*
* This is NULL if we're not waiting to switch contexts.
* Otherwise, holds a reference to @context (put after use).
*/
struct pt_sb_context *next_context;
/* The start address of the kernel.
*
* This is used to distinguish kernel from user addresses:
*
* kernel >= @kernel_start
* user < @kernel_start
*
* This is only required when tracing ring-0.
*/
uint64_t kernel_start;
/* An offset to be subtracted from every sideband record timestamp.
*
* This applies sideband records a little bit earlier to compensate for
* too coarse timing.
*/
uint64_t tsc_offset;
/* The current code location estimated from previous events. */
enum pt_sb_pevent_loc location;
};
extern int pt_sb_pevent_init(struct pt_sb_pevent_priv *priv,
const struct pt_sb_pevent_config *config);
#endif /* PT_SB_PEVENT_H */
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