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/*
* Oracle Linux DTrace.
* Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
#ifndef _DT_PEB_H
#define _DT_PEB_H
#include <stddef.h>
#include <stdint.h>
#include <dt_impl.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Perf event buffer.
*/
typedef struct dt_peb {
dtrace_hdl_t *dtp; /* pointer to containing dtrace_hdl */
int cpu; /* ID of CPU that uses this buffer */
int fd; /* fd of perf output buffer */
char *base; /* address of buffer */
char *endp; /* address of end of buffer */
uint64_t last_head; /* last known head, for peeking */
} dt_peb_t;
/*
* Set of perf event buffers. This structure stores buffer information that is
* shared between all buffers, a shared chunk of memory to copy any event that
* spans the ring buffer boundary, and an array of perf event buffers.
*/
typedef struct dt_pebset {
size_t page_size; /* size of each page in buffer */
size_t data_size; /* total buffer size */
struct dt_peb *pebs; /* array of perf event buffers */
char *tmp; /* temporary event buffer */
size_t tmp_len; /* length of temporary event buffer */
} dt_pebset_t;
extern void dt_pebs_exit(dtrace_hdl_t *);
extern int dt_pebs_init(dtrace_hdl_t *, size_t);
#ifdef __cplusplus
}
#endif
#endif /* _DT_PEB_H */
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