static void
table_end_staging_ranges(ErtsAlcType_t alctr, struct ranges* r, int commit)
{
ErtsCodeIndex dst = erts_staging_code_ix();
if (commit && r[dst].modules == NULL) {
Sint i;
Sint n;
/* No modules added, just clone src and remove purged code. */
ErtsCodeIndex src = erts_active_code_ix();
erts_smp_atomic_add_nob(&mem_used, r[src].n);
r[dst].modules = erts_alloc(alctr, r[src].n * sizeof(Range));
r[dst].allocated = r[src].n;
n = 0;
for (i = 0; i < r[src].n; i++) {
Range* rp = r[src].modules+i;
if (rp->start < RANGE_END(rp)) {
/* Only insert a module that has not been purged. */
r[dst].modules[n] = *rp;
n++;
}
}
r[dst].n = n;
erts_smp_atomic_set_nob(&r[dst].mid,
(erts_aint_t) (r[dst].modules + n / 2));
}
}
void
erts_cleanup_port_data(Port *prt)
{
ASSERT(erts_atomic32_read_nob(&prt->state) & ERTS_PORT_SFLGS_INVALID_LOOKUP);
cleanup_old_port_data(erts_smp_atomic_read_nob(&prt->data));
erts_smp_atomic_set_nob(&prt->data, (erts_aint_t) THE_NON_VALUE);
}
static ERTS_INLINE void
reset_handle(ErtsPortTask *ptp)
{
if (ptp->handle) {
ASSERT(ptp == handle2task(ptp->handle));
erts_smp_atomic_set_nob(ptp->handle, (erts_aint_t) NULL);
}
}
static ERTS_INLINE void
set_handle(ErtsPortTask *ptp, ErtsPortTaskHandle *pthp)
{
ptp->handle = pthp;
if (pthp) {
erts_smp_atomic_set_nob(pthp, (erts_aint_t) ptp);
ASSERT(ptp == handle2task(ptp->handle));
}
}
void
erts_remove_from_ranges(BeamInstr* code)
{
Range* rp = find_range(range_tables, code);
#ifdef ERTS_SLAVE_EMU_ENABLED
if (slave_initialised && rp == 0)
rp = find_range(slave_range_tables, code);
#endif
erts_smp_atomic_set_nob(&rp->end, (erts_aint_t)rp->start);
}
ErtsMigrateResult
erts_port_migrate(Port *prt, int *prt_locked,
ErtsRunQueue *from_rq, int *from_locked,
ErtsRunQueue *to_rq, int *to_locked)
{
ERTS_SMP_LC_ASSERT(*from_locked);
ERTS_SMP_LC_CHK_RUNQ_LOCK(from_rq, *from_locked);
ERTS_SMP_LC_CHK_RUNQ_LOCK(to_rq, *to_locked);
ASSERT(!erts_common_run_queue);
if (!*from_locked || !*to_locked) {
if (from_rq < to_rq) {
if (!*to_locked) {
if (!*from_locked)
erts_smp_runq_lock(from_rq);
erts_smp_runq_lock(to_rq);
}
else if (erts_smp_runq_trylock(from_rq) == EBUSY) {
erts_smp_runq_unlock(to_rq);
erts_smp_runq_lock(from_rq);
erts_smp_runq_lock(to_rq);
}
}
else {
if (!*from_locked) {
if (!*to_locked)
erts_smp_runq_lock(to_rq);
erts_smp_runq_lock(from_rq);
}
else if (erts_smp_runq_trylock(to_rq) == EBUSY) {
erts_smp_runq_unlock(from_rq);
erts_smp_runq_lock(to_rq);
erts_smp_runq_lock(from_rq);
}
}
*to_locked = *from_locked = 1;
}
ERTS_SMP_LC_CHK_RUNQ_LOCK(from_rq, *from_locked);
ERTS_SMP_LC_CHK_RUNQ_LOCK(to_rq, *to_locked);
/* Refuse to migrate to a suspended run queue */
if (to_rq->flags & ERTS_RUNQ_FLG_SUSPENDED)
return ERTS_MIGRATE_FAILED_RUNQ_SUSPENDED;
if (from_rq != (ErtsRunQueue *) erts_smp_atomic_read_nob(&prt->run_queue))
return ERTS_MIGRATE_FAILED_RUNQ_CHANGED;
if (!ERTS_PORT_IS_IN_RUNQ(from_rq, prt))
return ERTS_MIGRATE_FAILED_NOT_IN_RUNQ;
dequeue_port(from_rq, prt);
erts_smp_atomic_set_nob(&prt->run_queue, (erts_aint_t) to_rq);
enqueue_port(to_rq, prt);
return ERTS_MIGRATE_SUCCESS;
}
int
erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp)
{
int port_was_enqueued = 0;
Port *pp;
ErtsPortTaskQueue *ptqp;
ErtsPortTask *ptp;
int res = 0;
int reds = ERTS_PORT_REDS_EXECUTE;
erts_aint_t io_tasks_executed = 0;
int fpe_was_unmasked;
ErtsPortTaskExeBlockData blk_data = {runq, NULL};
ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(runq));
ERTS_PT_CHK_PORTQ(runq);
pp = pop_port(runq);
if (!pp) {
res = 0;
goto done;
}
ERTS_PORT_NOT_IN_RUNQ(pp);
*curr_port_pp = pp;
ASSERT(pp->sched.taskq);
ASSERT(pp->sched.taskq->first);
ptqp = pp->sched.taskq;
pp->sched.taskq = NULL;
ASSERT(!pp->sched.exe_taskq);
pp->sched.exe_taskq = ptqp;
if (erts_smp_port_trylock(pp) == EBUSY) {
erts_smp_runq_unlock(runq);
erts_smp_port_lock(pp);
erts_smp_runq_lock(runq);
}
if (erts_sched_stat.enabled) {
ErtsSchedulerData *esdp = erts_get_scheduler_data();
Uint old = ERTS_PORT_SCHED_ID(pp, esdp->no);
int migrated = old && old != esdp->no;
erts_smp_spin_lock(&erts_sched_stat.lock);
erts_sched_stat.prio[ERTS_PORT_PRIO_LEVEL].total_executed++;
erts_sched_stat.prio[ERTS_PORT_PRIO_LEVEL].executed++;
if (migrated) {
erts_sched_stat.prio[ERTS_PORT_PRIO_LEVEL].total_migrated++;
erts_sched_stat.prio[ERTS_PORT_PRIO_LEVEL].migrated++;
}
erts_smp_spin_unlock(&erts_sched_stat.lock);
}
/* trace port scheduling, in */
if (IS_TRACED_FL(pp, F_TRACE_SCHED_PORTS)) {
trace_sched_ports(pp, am_in);
}
ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(pp));
ERTS_PT_CHK_PRES_PORTQ(runq, pp);
ptp = pop_task(ptqp);
fpe_was_unmasked = erts_block_fpe();
while (ptp) {
ASSERT(pp->sched.taskq != pp->sched.exe_taskq);
reset_handle(ptp);
erts_smp_runq_unlock(runq);
ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(pp));
ERTS_SMP_CHK_NO_PROC_LOCKS;
ASSERT(pp->drv_ptr);
switch (ptp->type) {
case ERTS_PORT_TASK_FREE: /* May be pushed in q at any time */
reds += ERTS_PORT_REDS_FREE;
erts_smp_runq_lock(runq);
erts_unblock_fpe(fpe_was_unmasked);
ASSERT(pp->status & ERTS_PORT_SFLG_FREE_SCHEDULED);
if (ptqp->first || (pp->sched.taskq && pp->sched.taskq->first))
handle_remaining_tasks(runq, pp);
ASSERT(!ptqp->first
&& (!pp->sched.taskq || !pp->sched.taskq->first));
#ifdef ERTS_SMP
erts_smp_atomic_dec_nob(&pp->refc); /* Not alive */
ERTS_SMP_LC_ASSERT(erts_smp_atomic_read_nob(&pp->refc) > 0); /* Lock */
#else
erts_port_status_bor_set(pp, ERTS_PORT_SFLG_FREE);
#endif
port_task_free(ptp);
if (pp->sched.taskq)
port_taskq_free(pp->sched.taskq);
pp->sched.taskq = NULL;
goto tasks_done;
case ERTS_PORT_TASK_TIMEOUT:
reds += ERTS_PORT_REDS_TIMEOUT;
if (!(pp->status & ERTS_PORT_SFLGS_DEAD))
(*pp->drv_ptr->timeout)((ErlDrvData) pp->drv_data);
break;
case ERTS_PORT_TASK_INPUT:
reds += ERTS_PORT_REDS_INPUT;
ASSERT((pp->status & ERTS_PORT_SFLGS_DEAD) == 0);
/* NOTE some windows drivers use ->ready_input for input and output */
(*pp->drv_ptr->ready_input)((ErlDrvData) pp->drv_data, ptp->event);
io_tasks_executed++;
break;
case ERTS_PORT_TASK_OUTPUT:
reds += ERTS_PORT_REDS_OUTPUT;
ASSERT((pp->status & ERTS_PORT_SFLGS_DEAD) == 0);
(*pp->drv_ptr->ready_output)((ErlDrvData) pp->drv_data, ptp->event);
io_tasks_executed++;
break;
case ERTS_PORT_TASK_EVENT:
reds += ERTS_PORT_REDS_EVENT;
ASSERT((pp->status & ERTS_PORT_SFLGS_DEAD) == 0);
(*pp->drv_ptr->event)((ErlDrvData) pp->drv_data, ptp->event, ptp->event_data);
io_tasks_executed++;
break;
case ERTS_PORT_TASK_DIST_CMD:
reds += erts_dist_command(pp, CONTEXT_REDS-reds);
break;
default:
erl_exit(ERTS_ABORT_EXIT,
"Invalid port task type: %d\n",
(int) ptp->type);
break;
}
if ((pp->status & ERTS_PORT_SFLG_CLOSING)
&& erts_is_port_ioq_empty(pp)) {
reds += ERTS_PORT_REDS_TERMINATE;
erts_terminate_port(pp);
}
ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(pp));
#ifdef ERTS_SMP
if (pp->xports)
erts_smp_xports_unlock(pp);
ASSERT(!pp->xports);
#endif
ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(pp));
port_task_free(ptp);
erts_smp_runq_lock(runq);
ptp = pop_task(ptqp);
}
tasks_done:
erts_unblock_fpe(fpe_was_unmasked);
if (io_tasks_executed) {
ASSERT(erts_smp_atomic_read_nob(&erts_port_task_outstanding_io_tasks)
>= io_tasks_executed);
erts_smp_atomic_add_relb(&erts_port_task_outstanding_io_tasks,
-1*io_tasks_executed);
}
*curr_port_pp = NULL;
#ifdef ERTS_SMP
ASSERT(runq == (ErtsRunQueue *) erts_smp_atomic_read_nob(&pp->run_queue));
#endif
if (!pp->sched.taskq) {
ASSERT(pp->sched.exe_taskq);
pp->sched.exe_taskq = NULL;
}
else {
#ifdef ERTS_SMP
ErtsRunQueue *xrunq;
#endif
ASSERT(!(pp->status & ERTS_PORT_SFLGS_DEAD));
ASSERT(pp->sched.taskq->first);
#ifdef ERTS_SMP
xrunq = erts_check_emigration_need(runq, ERTS_PORT_PRIO_LEVEL);
if (!xrunq) {
#endif
enqueue_port(runq, pp);
ASSERT(pp->sched.exe_taskq);
pp->sched.exe_taskq = NULL;
/* No need to notify ourselves about inc in runq. */
#ifdef ERTS_SMP
}
else {
/* Port emigrated ... */
erts_smp_atomic_set_nob(&pp->run_queue, (erts_aint_t) xrunq);
enqueue_port(xrunq, pp);
ASSERT(pp->sched.exe_taskq);
pp->sched.exe_taskq = NULL;
erts_smp_runq_unlock(xrunq);
erts_smp_notify_inc_runq(xrunq);
}
#endif
port_was_enqueued = 1;
}
res = (erts_smp_atomic_read_nob(&erts_port_task_outstanding_io_tasks)
!= (erts_aint_t) 0);
ERTS_PT_CHK_PRES_PORTQ(runq, pp);
port_taskq_free(ptqp);
if (erts_system_profile_flags.runnable_ports && (port_was_enqueued != 1)) {
profile_runnable_port(pp, am_inactive);
}
/* trace port scheduling, out */
if (IS_TRACED_FL(pp, F_TRACE_SCHED_PORTS)) {
trace_sched_ports(pp, am_out);
}
#ifndef ERTS_SMP
erts_port_release(pp);
#else
{
erts_aint_t refc;
erts_smp_mtx_unlock(pp->lock);
refc = erts_smp_atomic_dec_read_nob(&pp->refc);
ASSERT(refc >= 0);
if (refc == 0) {
erts_smp_runq_unlock(runq);
erts_port_cleanup(pp); /* Might aquire runq lock */
erts_smp_runq_lock(runq);
res = (erts_smp_atomic_read_nob(&erts_port_task_outstanding_io_tasks)
!= (erts_aint_t) 0);
}
}
#endif
done:
blk_data.resp = &res;
ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(runq));
ERTS_PORT_REDUCTIONS_EXECUTED(runq, reds);
return res;
}
int
erts_port_task_schedule(Eterm id,
ErtsPortTaskHandle *pthp,
ErtsPortTaskType type,
ErlDrvEvent event,
ErlDrvEventData event_data)
{
ErtsRunQueue *runq;
Port *pp;
ErtsPortTask *ptp;
int enq_port = 0;
/*
* NOTE: We might not have the port lock here. We are only
* allowed to access the 'sched', 'tab_status',
* and 'id' fields of the port struct while
* tasks_lock is held.
*/
if (pthp && erts_port_task_is_scheduled(pthp)) {
ASSERT(0);
erts_port_task_abort(id, pthp);
}
ptp = port_task_alloc();
ASSERT(is_internal_port(id));
pp = &erts_port[internal_port_index(id)];
runq = erts_port_runq(pp);
if (!runq || ERTS_PORT_TASK_INVALID_PORT(pp, id)) {
if (runq)
erts_smp_runq_unlock(runq);
return -1;
}
ASSERT(!erts_port_task_is_scheduled(pthp));
ERTS_PT_CHK_PRES_PORTQ(runq, pp);
if (!pp->sched.taskq) {
pp->sched.taskq = port_taskq_init(port_taskq_alloc(), pp);
enq_port = !pp->sched.exe_taskq;
}
#ifdef ERTS_SMP
if (enq_port) {
ErtsRunQueue *xrunq = erts_check_emigration_need(runq, ERTS_PORT_PRIO_LEVEL);
if (xrunq) {
/* Port emigrated ... */
erts_smp_atomic_set_nob(&pp->run_queue, (erts_aint_t) xrunq);
erts_smp_runq_unlock(runq);
runq = xrunq;
}
}
#endif
ASSERT(!enq_port || !(runq->flags & ERTS_RUNQ_FLG_SUSPENDED));
ASSERT(pp->sched.taskq);
ASSERT(ptp);
ptp->type = type;
ptp->event = event;
ptp->event_data = event_data;
set_handle(ptp, pthp);
switch (type) {
case ERTS_PORT_TASK_FREE:
erl_exit(ERTS_ABORT_EXIT,
"erts_port_task_schedule(): Cannot schedule free task\n");
break;
case ERTS_PORT_TASK_INPUT:
case ERTS_PORT_TASK_OUTPUT:
case ERTS_PORT_TASK_EVENT:
erts_smp_atomic_inc_relb(&erts_port_task_outstanding_io_tasks);
/* Fall through... */
default:
enqueue_task(pp->sched.taskq, ptp);
break;
}
#ifndef ERTS_SMP
/*
* When (!enq_port && !pp->sched.exe_taskq) is true in the smp case,
* the port might not be in the run queue. If this is the case, another
* thread is in the process of enqueueing the port. This very seldom
* occur, but do occur and is a valid scenario. Debug info showing this
* enqueue in progress must be introduced before we can enable (modified
* versions of these) assertions in the smp case again.
*/
#if defined(HARD_DEBUG)
if (pp->sched.exe_taskq || enq_port)
ERTS_PT_CHK_NOT_IN_PORTQ(runq, pp);
else
ERTS_PT_CHK_IN_PORTQ(runq, pp);
#elif defined(DEBUG)
if (!enq_port && !pp->sched.exe_taskq) {
/* We should be in port run q */
ASSERT(pp->sched.prev || runq->ports.start == pp);
}
#endif
#endif
if (!enq_port) {
ERTS_PT_CHK_PRES_PORTQ(runq, pp);
erts_smp_runq_unlock(runq);
}
else {
enqueue_port(runq, pp);
ERTS_PT_CHK_PRES_PORTQ(runq, pp);
if (erts_system_profile_flags.runnable_ports) {
profile_runnable_port(pp, am_active);
}
erts_smp_runq_unlock(runq);
erts_smp_notify_inc_runq(runq);
}
return 0;
}
static void
table_update_ranges(ErtsAlcType_t alctr, struct ranges* r, BeamInstr* code,
Uint size)
{
ErtsCodeIndex dst = erts_staging_code_ix();
ErtsCodeIndex src = erts_active_code_ix();
Sint i;
Sint n;
Sint need;
if (src == dst) {
ASSERT(!erts_initialized);
/*
* During start-up of system, the indices are the same.
* Handle this by faking a source area.
*/
src = (src+1) % ERTS_NUM_CODE_IX;
if (r[src].modules) {
erts_smp_atomic_add_nob(&mem_used, -r[src].allocated);
erts_free(alctr, r[src].modules);
}
r[src] = r[dst];
r[dst].modules = 0;
}
CHECK(&r[src]);
ASSERT(r[dst].modules == NULL);
need = r[dst].allocated = r[src].n + 1;
erts_smp_atomic_add_nob(&mem_used, need);
r[dst].modules = (Range *) erts_alloc(alctr, need * sizeof(Range));
n = 0;
for (i = 0; i < r[src].n; i++) {
Range* rp = r[src].modules+i;
if (code < rp->start) {
r[dst].modules[n].start = code;
erts_smp_atomic_init_nob(&r[dst].modules[n].end,
(erts_aint_t)(((byte *)code) + size));
ASSERT(!n || RANGE_END(&r[dst].modules[n-1]) < code);
n++;
break;
}
if (rp->start < RANGE_END(rp)) {
/* Only insert a module that has not been purged. */
r[dst].modules[n].start = rp->start;
erts_smp_atomic_init_nob(&r[dst].modules[n].end,
(erts_aint_t)(RANGE_END(rp)));
ASSERT(!n || RANGE_END(&r[dst].modules[n-1]) < rp->start);
n++;
}
}
while (i < r[src].n) {
Range* rp = r[src].modules+i;
if (rp->start < RANGE_END(rp)) {
/* Only insert a module that has not been purged. */
r[dst].modules[n].start = rp->start;
erts_smp_atomic_init_nob(&r[dst].modules[n].end,
(erts_aint_t)(RANGE_END(rp)));
ASSERT(!n || RANGE_END(&r[dst].modules[n-1]) < rp->start);
n++;
}
i++;
}
if (n == 0 || code > r[dst].modules[n-1].start) {
r[dst].modules[n].start = code;
erts_smp_atomic_init_nob(&r[dst].modules[n].end,
(erts_aint_t)(((byte *)code) + size));
ASSERT(!n || RANGE_END(&r[dst].modules[n-1]) < code);
n++;
}
ASSERT(n <= r[src].n+1);
r[dst].n = n;
erts_smp_atomic_set_nob(&r[dst].mid,
(erts_aint_t) (r[dst].modules + n / 2));
CHECK(&r[dst]);
CHECK(&r[src]);
}
/*
* Entry point called by the trace wrap functions in erl_bif_wrap.c
*
* The trace wrap functions are themselves called through the export
* entries instead of the original BIF functions.
*/
Eterm
erts_bif_trace(int bif_index, Process* p, Eterm* args, BeamInstr* I)
{
Eterm result;
Eterm (*func)(Process*, Eterm*, BeamInstr*);
Export* ep = bif_export[bif_index];
Uint32 flags = 0, flags_meta = 0;
Eterm meta_tracer_pid = NIL;
int applying = (I == &(ep->code[3])); /* Yup, the apply code for a bif
* is actually in the
* export entry */
BeamInstr *cp = p->cp;
GenericBp* g;
GenericBpData* bp = NULL;
Uint bp_flags = 0;
ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p);
g = (GenericBp *) ep->fake_op_func_info_for_hipe[1];
if (g) {
bp = &g->data[erts_active_bp_ix()];
bp_flags = bp->flags;
}
/*
* Make continuation pointer OK, it is not during direct BIF calls,
* but it is correct during apply of bif.
*/
if (!applying) {
p->cp = I;
}
if (bp_flags & (ERTS_BPF_LOCAL_TRACE|ERTS_BPF_GLOBAL_TRACE) &&
IS_TRACED_FL(p, F_TRACE_CALLS)) {
int local = !!(bp_flags & ERTS_BPF_LOCAL_TRACE);
flags = erts_call_trace(p, ep->code, bp->local_ms, args,
local, &ERTS_TRACER_PROC(p));
}
if (bp_flags & ERTS_BPF_META_TRACE) {
Eterm tpid1, tpid2;
tpid1 = tpid2 =
(Eterm) erts_smp_atomic_read_nob(&bp->meta_pid->pid);
flags_meta = erts_call_trace(p, ep->code, bp->meta_ms, args,
0, &tpid2);
meta_tracer_pid = tpid2;
if (tpid1 != tpid2) {
erts_smp_atomic_set_nob(&bp->meta_pid->pid, tpid2);
}
}
if (bp_flags & ERTS_BPF_TIME_TRACE_ACTIVE &&
IS_TRACED_FL(p, F_TRACE_CALLS) &&
erts_is_tracer_proc_valid(p)) {
BeamInstr *pc = (BeamInstr *)ep->code+3;
erts_trace_time_call(p, pc, bp->time);
}
/* Restore original continuation pointer (if changed). */
p->cp = cp;
func = bif_table[bif_index].f;
result = func(p, args, I);
if (applying && (flags & MATCH_SET_RETURN_TO_TRACE)) {
BeamInstr i_return_trace = beam_return_trace[0];
BeamInstr i_return_to_trace = beam_return_to_trace[0];
BeamInstr i_return_time_trace = beam_return_time_trace[0];
Eterm *cpp;
/* Maybe advance cp to skip trace stack frames */
for (cpp = p->stop; ; cp = cp_val(*cpp++)) {
if (*cp == i_return_trace) {
/* Skip stack frame variables */
while (is_not_CP(*cpp)) cpp++;
cpp += 2; /* Skip return_trace parameters */
} else if (*cp == i_return_time_trace) {
/* Skip stack frame variables */
while (is_not_CP(*cpp)) cpp++;
cpp += 1; /* Skip return_time_trace parameters */
} else if (*cp == i_return_to_trace) {
/* A return_to trace message is going to be generated
* by normal means, so we do not have to.
*/
cp = NULL;
break;
} else break;
}
}
/* Try to get these in the order
* they usually appear in normal code... */
if (is_non_value(result)) {
Uint reason = p->freason;
if (reason != TRAP) {
Eterm class;
Eterm value = p->fvalue;
DeclareTmpHeapNoproc(nocatch,3);
UseTmpHeapNoproc(3);
/* Expand error value like in handle_error() */
if (reason & EXF_ARGLIST) {
Eterm *tp;
ASSERT(is_tuple(value));
tp = tuple_val(value);
value = tp[1];
}
if ((reason & EXF_THROWN) && (p->catches <= 0)) {
value = TUPLE2(nocatch, am_nocatch, value);
reason = EXC_ERROR;
}
/* Note: expand_error_value() could theoretically
* allocate on the heap, but not for any error
* returned by a BIF, and it would do no harm,
* just be annoying.
*/
value = expand_error_value(p, reason, value);
class = exception_tag[GET_EXC_CLASS(reason)];
if (flags_meta & MATCH_SET_EXCEPTION_TRACE) {
erts_trace_exception(p, ep->code, class, value,
&meta_tracer_pid);
}
if (flags & MATCH_SET_EXCEPTION_TRACE) {
erts_trace_exception(p, ep->code, class, value,
&ERTS_TRACER_PROC(p));
}
BeamInstr
erts_generic_breakpoint(Process* c_p, BeamInstr* I, Eterm* reg)
{
GenericBp* g;
GenericBpData* bp;
Uint bp_flags;
ErtsBpIndex ix = erts_active_bp_ix();
g = (GenericBp *) I[-4];
bp = &g->data[ix];
bp_flags = bp->flags;
ASSERT((bp_flags & ~ERTS_BPF_ALL) == 0);
if (bp_flags & (ERTS_BPF_LOCAL_TRACE|
ERTS_BPF_GLOBAL_TRACE|
ERTS_BPF_TIME_TRACE_ACTIVE) &&
!IS_TRACED_FL(c_p, F_TRACE_CALLS)) {
bp_flags &= ~(ERTS_BPF_LOCAL_TRACE|
ERTS_BPF_GLOBAL_TRACE|
ERTS_BPF_TIME_TRACE|
ERTS_BPF_TIME_TRACE_ACTIVE);
if (bp_flags == 0) { /* Quick exit */
return g->orig_instr;
}
}
if (bp_flags & ERTS_BPF_LOCAL_TRACE) {
ASSERT((bp_flags & ERTS_BPF_GLOBAL_TRACE) == 0);
(void) do_call_trace(c_p, I, reg, 1, bp->local_ms, am_true);
} else if (bp_flags & ERTS_BPF_GLOBAL_TRACE) {
(void) do_call_trace(c_p, I, reg, 0, bp->local_ms, am_true);
}
if (bp_flags & ERTS_BPF_META_TRACE) {
Eterm old_pid;
Eterm new_pid;
old_pid = (Eterm) erts_smp_atomic_read_nob(&bp->meta_pid->pid);
new_pid = do_call_trace(c_p, I, reg, 1, bp->meta_ms, old_pid);
if (new_pid != old_pid) {
erts_smp_atomic_set_nob(&bp->meta_pid->pid, new_pid);
}
}
if (bp_flags & ERTS_BPF_COUNT_ACTIVE) {
erts_smp_atomic_inc_nob(&bp->count->acount);
}
if (bp_flags & ERTS_BPF_TIME_TRACE_ACTIVE && erts_is_tracer_proc_valid(c_p)) {
Eterm w;
erts_trace_time_call(c_p, I, bp->time);
w = (BeamInstr) *c_p->cp;
if (! (w == (BeamInstr) BeamOp(op_i_return_time_trace) ||
w == (BeamInstr) BeamOp(op_return_trace) ||
w == (BeamInstr) BeamOp(op_i_return_to_trace)) ) {
Eterm* E = c_p->stop;
ASSERT(c_p->htop <= E && E <= c_p->hend);
if (E - 2 < c_p->htop) {
(void) erts_garbage_collect(c_p, 2, reg, I[-1]);
ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
}
E = c_p->stop;
ASSERT(c_p->htop <= E && E <= c_p->hend);
E -= 2;
E[0] = make_cp(I);
E[1] = make_cp(c_p->cp); /* original return address */
c_p->cp = beam_return_time_trace;
c_p->stop = E;
}
}
if (bp_flags & ERTS_BPF_DEBUG) {
return (BeamInstr) BeamOp(op_i_debug_breakpoint);
} else {
return g->orig_instr;
}
}
