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/* $OpenBSD: dt_prov_static.c,v 1.8 2021/06/07 13:55:54 dv Exp $ */
/*
* Copyright (c) 2019 Martin Pieuchot <mpi@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/param.h>
#include <sys/tracepoint.h>
#include <dev/dt/dtvar.h>
int dt_prov_static_alloc(struct dt_probe *, struct dt_softc *,
struct dt_pcb_list *, struct dtioc_req *);
void dt_prov_static_hook(struct dt_provider *, ...);
struct dt_provider dt_prov_static = {
.dtpv_name = "tracepoint",
.dtpv_alloc = dt_prov_static_alloc,
.dtpv_enter = dt_prov_static_hook,
};
/*
* Scheduler
*/
DT_STATIC_PROBE2(sched, dequeue, "pid_t", "pid_t");
DT_STATIC_PROBE2(sched, enqueue, "pid_t", "pid_t");
DT_STATIC_PROBE2(sched, off__cpu, "pid_t", "pid_t");
DT_STATIC_PROBE0(sched, on__cpu);
DT_STATIC_PROBE0(sched, remain__cpu);
DT_STATIC_PROBE0(sched, sleep);
DT_STATIC_PROBE0(sched, wakeup);
/*
* Raw syscalls
*/
DT_STATIC_PROBE1(raw_syscalls, sys_enter, "register_t");
DT_STATIC_PROBE1(raw_syscalls, sys_exit, "register_t");
/*
* UVM
*/
DT_STATIC_PROBE3(uvm, fault, "vaddr_t", "vm_fault_t", "vm_prot_t");
DT_STATIC_PROBE3(uvm, map_insert, "vaddr_t", "vaddr_t", "vm_prot_t");
DT_STATIC_PROBE3(uvm, map_remove, "vaddr_t", "vaddr_t", "vm_prot_t");
DT_STATIC_PROBE4(uvm, malloc, "int", "void *", "size_t", "int");
DT_STATIC_PROBE3(uvm, free, "int", "void *", "size_t");
DT_STATIC_PROBE3(uvm, pool_get, "void *", "void *", "int");
DT_STATIC_PROBE2(uvm, pool_put, "void *", "void *");
/*
* VFS
*/
DT_STATIC_PROBE3(vfs, bufcache_rel, "long", "int", "int64_t");
DT_STATIC_PROBE3(vfs, bufcache_take, "long", "int", "int64_t");
DT_STATIC_PROBE4(vfs, cleaner, "long", "int", "long", "long");
/*
* VMM
*/
DT_STATIC_PROBE2(vmm, guest_enter, "void *", "void *");
DT_STATIC_PROBE3(vmm, guest_exit, "void *", "void *", "uint64_t");
/*
* List of all static probes
*/
struct dt_probe *dtps_static[] = {
/* Scheduler */
&_DT_STATIC_P(sched, dequeue),
&_DT_STATIC_P(sched, enqueue),
&_DT_STATIC_P(sched, off__cpu),
&_DT_STATIC_P(sched, on__cpu),
&_DT_STATIC_P(sched, remain__cpu),
&_DT_STATIC_P(sched, sleep),
&_DT_STATIC_P(sched, wakeup),
/* Raw syscalls */
&_DT_STATIC_P(raw_syscalls, sys_enter),
&_DT_STATIC_P(raw_syscalls, sys_exit),
/* UVM */
&_DT_STATIC_P(uvm, fault),
&_DT_STATIC_P(uvm, map_insert),
&_DT_STATIC_P(uvm, map_remove),
&_DT_STATIC_P(uvm, malloc),
&_DT_STATIC_P(uvm, free),
&_DT_STATIC_P(uvm, pool_get),
&_DT_STATIC_P(uvm, pool_put),
/* VFS */
&_DT_STATIC_P(vfs, bufcache_rel),
&_DT_STATIC_P(vfs, bufcache_take),
&_DT_STATIC_P(vfs, cleaner),
/* VMM */
&_DT_STATIC_P(vmm, guest_enter),
&_DT_STATIC_P(vmm, guest_exit),
};
int
dt_prov_static_init(void)
{
int i;
for (i = 0; i < nitems(dtps_static); i++)
dt_dev_register_probe(dtps_static[i]);
return i;
}
int
dt_prov_static_alloc(struct dt_probe *dtp, struct dt_softc *sc,
struct dt_pcb_list *plist, struct dtioc_req *dtrq)
{
struct dt_pcb *dp;
KASSERT(dtioc_req_isvalid(dtrq));
KASSERT(TAILQ_EMPTY(plist));
dp = dt_pcb_alloc(dtp, sc);
if (dp == NULL)
return ENOMEM;
dp->dp_filter = dtrq->dtrq_filter;
dp->dp_evtflags = dtrq->dtrq_evtflags;
TAILQ_INSERT_HEAD(plist, dp, dp_snext);
return 0;
}
void
dt_prov_static_hook(struct dt_provider *dtpv, ...)
{
struct dt_probe *dtp;
struct dt_pcb *dp;
uintptr_t args[5];
va_list ap;
int i;
va_start(ap, dtpv);
dtp = va_arg(ap, struct dt_probe *);
for (i = 0; i < dtp->dtp_nargs; i++) {
args[i] = va_arg(ap, uintptr_t);
}
va_end(ap);
KASSERT(dtpv == dtp->dtp_prov);
smr_read_enter();
SMR_SLIST_FOREACH(dp, &dtp->dtp_pcbs, dp_pnext) {
struct dt_evt *dtev;
dtev = dt_pcb_ring_get(dp, 0);
if (dtev == NULL)
continue;
dtev->dtev_sysargs[0] = args[0];
dtev->dtev_sysargs[1] = args[1];
dtev->dtev_sysargs[2] = args[2];
dtev->dtev_sysargs[3] = args[3];
dtev->dtev_sysargs[4] = args[4];
dt_pcb_ring_consume(dp, dtev);
}
smr_read_leave();
}
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