/
bif.c
5800 lines (4981 loc) · 156 KB
/
bif.c
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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1996-2024. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stddef.h> /* offsetof() */
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#define WANT_NONBLOCKING
#include "sys.h"
#include "erl_vm.h"
#include "erl_sys_driver.h"
#include "global.h"
#include "erl_process.h"
#include "error.h"
#include "bif.h"
#include "big.h"
#include "dist.h"
#include "erl_version.h"
#include "erl_binary.h"
#include "beam_bp.h"
#include "erl_db_util.h"
#include "register.h"
#include "erl_thr_progress.h"
#define ERTS_PTAB_WANT_BIF_IMPL__
#include "erl_ptab.h"
#include "erl_bits.h"
#include "erl_bif_unique.h"
#include "erl_map.h"
#include "erl_msacc.h"
#include "erl_proc_sig_queue.h"
#include "erl_fun.h"
#include "ryu.h"
#include "jit/beam_asm.h"
#include "erl_global_literals.h"
#include "beam_load.h"
Export *erts_await_result;
static Export await_exit_trap;
static Export* flush_monitor_messages_trap = NULL;
static Export* set_cpu_topology_trap = NULL;
static Export* await_port_send_result_trap = NULL;
Export* erts_format_cpu_topology_trap = NULL;
#ifndef DEBUG
static
#endif
Export dsend_continue_trap_export;
Export *erts_convert_time_unit_trap = NULL;
static Export *await_msacc_mod_trap = NULL;
static erts_atomic32_t msacc;
static Export *system_flag_scheduler_wall_time_trap;
static Export *await_sched_wall_time_mod_trap;
static erts_atomic32_t sched_wall_time;
#define DECL_AM(S) Eterm AM_ ## S = am_atom_put(#S, sizeof(#S) - 1)
/*
* The BIF's now follow, see the Erlang Manual for a description of what
* each individual BIF does.
*/
BIF_RETTYPE spawn_3(BIF_ALIST_3)
{
ErlSpawnOpts so;
Eterm pid;
ERTS_SET_DEFAULT_SPAWN_OPTS(&so);
pid = erl_create_process(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3, &so);
if (is_non_value(pid)) {
BIF_ERROR(BIF_P, so.error_code);
} else {
if (ERTS_USE_MODIFIED_TIMING()) {
BIF_TRAP2(erts_delay_trap, BIF_P, pid, ERTS_MODIFIED_TIMING_DELAY);
}
BIF_RET(pid);
}
}
/**********************************************************************/
/* Utility to add a new link between processes p and another internal
* process (rpid). Process p must be the currently executing process.
*/
/* create a link to the process */
BIF_RETTYPE link_1(BIF_ALIST_1)
{
if (ERTS_IS_P_TRACED_FL(BIF_P, F_TRACE_PROCS)) {
trace_proc(BIF_P, ERTS_PROC_LOCK_MAIN, BIF_P, am_link, BIF_ARG_1);
}
/* check that the pid or port which is our argument is OK */
if (is_internal_pid(BIF_ARG_1)) {
int created;
ErtsLink *lnk, *rlnk;
if (BIF_P->common.id == BIF_ARG_1)
BIF_RET(am_true);
if (!erts_proc_lookup(BIF_ARG_1))
goto res_no_proc;
lnk = erts_link_internal_tree_lookup_create(&ERTS_P_LINKS(BIF_P),
&created,
ERTS_LNK_TYPE_PROC,
BIF_ARG_1);
if (!created) {
ErtsILink *ilnk = (ErtsILink *) lnk;
if (!ilnk->unlinking)
BIF_RET(am_true);
ilnk->unlinking = 0;
}
rlnk = erts_link_internal_create(ERTS_LNK_TYPE_PROC, BIF_P->common.id);
if (erts_proc_sig_send_link(&BIF_P->common, BIF_P->common.id,
BIF_ARG_1, rlnk)) {
BIF_RET(am_true);
}
erts_link_tree_delete(&ERTS_P_LINKS(BIF_P), lnk);
erts_link_internal_release(lnk);
erts_link_internal_release(rlnk);
goto res_no_proc;
}
if (is_internal_port(BIF_ARG_1)) {
int created;
ErtsLink *lnk, *rlnk;
Eterm ref;
Eterm *refp;
Port *prt = erts_port_lookup(BIF_ARG_1,
(erts_port_synchronous_ops
? ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP
: ERTS_PORT_SFLGS_INVALID_LOOKUP));
if (!prt)
goto res_no_proc;
lnk = erts_link_internal_tree_lookup_create(&ERTS_P_LINKS(BIF_P),
&created,
ERTS_LNK_TYPE_PORT,
BIF_ARG_1);
if (!created) {
ErtsILink *ilnk = (ErtsILink *) lnk;
if (!ilnk->unlinking)
BIF_RET(am_true);
ilnk->unlinking = 0;
}
rlnk = erts_link_internal_create(ERTS_LNK_TYPE_PROC, BIF_P->common.id);
refp = erts_port_synchronous_ops ? &ref : NULL;
switch (erts_port_link(BIF_P, prt, rlnk, refp)) {
case ERTS_PORT_OP_BADARG:
erts_link_internal_release(rlnk);
erts_link_tree_delete(&ERTS_P_LINKS(BIF_P), lnk);
erts_link_internal_release(lnk);
goto res_no_proc;
case ERTS_PORT_OP_DROPPED:
case ERTS_PORT_OP_SCHEDULED:
if (refp) {
ASSERT(is_internal_ordinary_ref(ref));
BIF_TRAP3(await_port_send_result_trap, BIF_P, ref, am_true, am_true);
}
default:
break;
}
BIF_RET(am_true);
}
else if (is_external_port(BIF_ARG_1)
&& external_port_dist_entry(BIF_ARG_1) == erts_this_dist_entry) {
goto res_no_proc;
}
if (is_external_pid(BIF_ARG_1)) {
ErtsELink *elnk, *relnk, *pelnk;
int created, replace;
DistEntry *dep;
ErtsLink *lnk, *rlnk;
int code;
ErtsDSigSendContext ctx;
dep = external_pid_dist_entry(BIF_ARG_1);
if (dep == erts_this_dist_entry)
goto res_no_proc;
lnk = erts_link_external_tree_lookup_create(&ERTS_P_LINKS(BIF_P),
&created,
ERTS_LNK_TYPE_DIST_PROC,
BIF_P->common.id,
BIF_ARG_1);
elnk = erts_link_to_elink(lnk);
if (created) {
pelnk = NULL;
relnk = NULL;
rlnk = NULL;
}
else {
if (!elnk->unlinking)
BIF_RET(am_true); /* Already present... */
/*
* We need to replace the link if the connection has changed.
* Prepare a link...
*/
pelnk = (ErtsELink *) erts_link_external_create(ERTS_LNK_TYPE_DIST_PROC,
BIF_P->common.id,
BIF_ARG_1);
ASSERT(eq(pelnk->ld.proc.other.item, BIF_ARG_1));
ASSERT(pelnk->ld.dist.other.item == BIF_P->common.id);
/* Release pelnk if not used as replacement... */
relnk = pelnk;
rlnk = &pelnk->ld.proc;
}
replace = 0;
ASSERT(eq(elnk->ld.proc.other.item, BIF_ARG_1));
ASSERT(elnk->ld.dist.other.item == BIF_P->common.id);
code = erts_dsig_prepare(&ctx, dep, BIF_P,
ERTS_PROC_LOCK_MAIN,
ERTS_DSP_RLOCK, 0, 1, 1);
switch (code) {
case ERTS_DSIG_PREP_NOT_ALIVE:
case ERTS_DSIG_PREP_NOT_CONNECTED:
if (created || elnk->unlinking) {
if (elnk->unlinking) {
/*
* Currently unlinking an old link from an old connection; replace
* old link with the prepared one...
*/
relnk = NULL;
rlnk = lnk;
elnk = pelnk;
replace = !0;
}
erts_link_set_dead_dist(&elnk->ld.dist, dep->sysname);
}
erts_proc_sig_send_link_exit_noconnection(&elnk->ld.dist);
break;
case ERTS_DSIG_PREP_PENDING:
case ERTS_DSIG_PREP_CONNECTED: {
/*
* We have a connection (or a pending connection).
* Setup link and enqueue link signal.
*/
if (created
|| (elnk->unlinking
&& elnk->dist->connection_id != ctx.connection_id)) {
int inserted;
if (!created) {
/*
* Currently unlinking an old link from an old connection; replace
* old link with the prepared one...
*/
rlnk = lnk;
if (erts_link_dist_delete(&elnk->ld.dist))
relnk = elnk;
else
relnk = NULL;
elnk = pelnk;
replace = !0;
}
inserted = erts_link_dist_insert(&elnk->ld.dist, dep->mld);
ASSERT(inserted); (void)inserted;
}
erts_de_runlock(dep);
code = erts_dsig_send_link(&ctx, BIF_P->common.id, BIF_ARG_1);
if (code == ERTS_DSIG_SEND_YIELD)
ERTS_BIF_YIELD_RETURN(BIF_P, am_true);
ASSERT(code == ERTS_DSIG_SEND_OK);
break;
}
default:
ERTS_ASSERT(! "Invalid dsig prepare result");
}
if (replace) {
ASSERT(pelnk);
erts_link_tree_replace(&ERTS_P_LINKS(BIF_P), rlnk, &pelnk->ld.proc);
}
if (relnk)
erts_link_release_both(&relnk->ld);
else if (rlnk)
erts_link_release(rlnk);
elnk->unlinking = 0;
BIF_RET(am_true);
}
BIF_ERROR(BIF_P, BADARG);
res_no_proc:
if (BIF_P->flags & F_TRAP_EXIT) {
ErtsProcLocks locks = ERTS_PROC_LOCK_MAIN;
erts_deliver_exit_message(BIF_ARG_1, BIF_P, &locks, am_noproc, NIL);
erts_proc_unlock(BIF_P, ~ERTS_PROC_LOCK_MAIN & locks);
BIF_RET(am_true);
}
else {
/*
* This behaviour is *really* sad but link/1 has
* behaved like this for ages (and this behaviour is
* actually documented)... :'-(
*
* The proper behavior would have been to
* send calling process an exit signal..
*/
BIF_ERROR(BIF_P, EXC_NOPROC);
}
}
static Eterm
demonitor(Process *c_p, Eterm ref, Eterm *multip)
{
ErtsMonitor *mon; /* The monitor entry to delete */
*multip = am_false;
if (is_not_internal_ref(ref)) {
if (is_external_ref(ref)
&& (erts_this_dist_entry
== external_ref_dist_entry(ref))) {
return am_false;
}
return am_badarg; /* Not monitored by this monitor's ref */
}
mon = erts_monitor_tree_lookup(ERTS_P_MONITORS(c_p), ref);
if (!mon)
return am_false;
if (!erts_monitor_is_origin(mon))
return am_badarg;
if (mon->type == ERTS_MON_TYPE_ALIAS)
return am_false; /* Not a monitor (may have been...) */
switch (mon->flags & ERTS_ML_STATE_ALIAS_MASK) {
case ERTS_ML_STATE_ALIAS_UNALIAS: {
ErtsMonitorData *amdp = erts_monitor_create(ERTS_MON_TYPE_ALIAS,
ref,
c_p->common.id,
NIL,
NIL,
THE_NON_VALUE);
amdp->origin.flags = mon->flags & ERTS_ML_STATE_ALIAS_MASK;
mon->flags &= ~ERTS_ML_STATE_ALIAS_MASK;
erts_monitor_tree_replace(&ERTS_P_MONITORS(c_p), mon, &amdp->origin);
break;
}
case ERTS_ML_STATE_ALIAS_ONCE:
case ERTS_ML_STATE_ALIAS_DEMONITOR:
/* fall through... */
default:
erts_monitor_tree_delete(&ERTS_P_MONITORS(c_p), mon);
break;
}
switch (mon->type) {
case ERTS_MON_TYPE_TIME_OFFSET:
*multip = am_true;
erts_demonitor_time_offset(mon);
return am_true;
case ERTS_MON_TYPE_PORT: {
Port *prt;
ASSERT(is_internal_port(mon->other.item));
prt = erts_port_lookup(mon->other.item, ERTS_PORT_SFLGS_DEAD);
if (!prt || erts_port_demonitor(c_p, prt, mon) == ERTS_PORT_OP_DROPPED)
erts_monitor_release(mon);
return am_true;
}
case ERTS_MON_TYPE_DIST_PORT: {
ASSERT(is_external_port(mon->other.item));
ASSERT(external_pid_dist_entry(mon->other.item)
== erts_this_dist_entry);
erts_monitor_release(mon);
return am_true;
}
case ERTS_MON_TYPE_PROC:
erts_proc_sig_send_demonitor(&c_p->common, c_p->common.id, 0, mon);
return am_true;
case ERTS_MON_TYPE_DIST_PROC: {
ErtsMonitorData *mdp = erts_monitor_to_data(mon);
Eterm to = mon->other.item;
DistEntry *dep;
int code = ERTS_DSIG_SEND_OK;
int deleted;
ErtsDSigSendContext ctx;
if (mon->flags & ERTS_ML_FLG_SPAWN_PENDING) {
/*
* Not allowed to remove this until spawn
* operation has succeeded; restore monitor...
*/
erts_monitor_tree_insert(&ERTS_P_MONITORS(c_p), mon);
return am_false;
}
ASSERT(is_external_pid(to) || is_node_name_atom(to));
if (is_external_pid(to))
dep = external_pid_dist_entry(to);
else /* Monitoring a name at node to */
dep = erts_sysname_to_connected_dist_entry(to);
if (!dep || dep == erts_this_dist_entry) {
erts_monitor_release(mon);
return am_false;
}
code = erts_dsig_prepare(&ctx, dep, c_p, ERTS_PROC_LOCK_MAIN,
ERTS_DSP_RLOCK, 0, 1, 0);
deleted = erts_monitor_dist_delete(&mdp->u.target);
switch (code) {
case ERTS_DSIG_PREP_NOT_ALIVE:
case ERTS_DSIG_PREP_NOT_CONNECTED:
/*
* In the smp case this is possible if the node goes
* down just before the call to demonitor.
*/
break;
case ERTS_DSIG_PREP_PENDING:
case ERTS_DSIG_PREP_CONNECTED: {
Eterm watched;
erts_de_runlock(dep);
if (mon->flags & ERTS_ML_FLG_NAME)
watched = ((ErtsMonitorDataExtended *) mdp)->u.name;
else
watched = to;
/*
* Soft (no force) send, use ->data in dist slot
* monitor list since in case of monitor name
* the atom is stored there. Yield if necessary.
*/
code = erts_dsig_send_demonitor(&ctx, c_p->common.id,
watched, mdp->ref);
break;
}
default:
ERTS_INTERNAL_ERROR("invalid result from erts_dsig_prepare()");
break;
}
if (deleted)
erts_monitor_release(&mdp->u.target);
erts_monitor_release(mon);
return code == ERTS_DSIG_SEND_YIELD ? am_yield : am_true;
}
default:
ERTS_INTERNAL_ERROR("Unexpected monitor type");
return am_false;
}
}
BIF_RETTYPE demonitor_1(BIF_ALIST_1)
{
Eterm multi;
switch (demonitor(BIF_P, BIF_ARG_1, &multi)) {
case am_false:
case am_true:
BIF_RET(am_true);
case am_yield:
ERTS_BIF_YIELD_RETURN(BIF_P, am_true);
case am_badarg:
default:
BIF_ERROR(BIF_P, BADARG);
}
}
BIF_RETTYPE demonitor_2(BIF_ALIST_2)
{
BIF_RETTYPE res;
Eterm multi = am_false;
int info = 0;
int flush = 0;
Eterm list = BIF_ARG_2;
while (is_list(list)) {
Eterm* consp = list_val(list);
switch (CAR(consp)) {
case am_flush:
flush = 1;
break;
case am_info:
info = 1;
break;
default:
goto badarg;
}
list = CDR(consp);
}
if (is_not_nil(list))
goto badarg;
res = am_true;
switch (demonitor(BIF_P, BIF_ARG_1, &multi)) {
case am_false:
if (info)
res = am_false;
if (flush) {
flush_messages:
BIF_TRAP3(flush_monitor_messages_trap, BIF_P,
BIF_ARG_1, multi, res);
}
/* Fall through... */
case am_true:
if (multi == am_true && flush)
goto flush_messages;
BIF_RET(res);
case am_yield:
/* return true after yield... */
if (flush) {
ERTS_VBUMP_ALL_REDS(BIF_P);
goto flush_messages;
}
ERTS_BIF_YIELD_RETURN(BIF_P, am_true);
case am_badarg:
default:
break;
}
badarg:
BIF_ERROR(BIF_P, BADARG);
}
Uint16
erts_monitor_opts(Eterm opts, Eterm *tag)
{
Uint16 add_oflags = 0;
*tag = THE_NON_VALUE;
while (is_list(opts)) {
Eterm *tpl, *cons, opt;
cons = list_val(opts);
opt = CAR(cons);
if (is_not_tuple(opt))
return (Uint16) ~0;
tpl = tuple_val(opt);
switch (arityval(tpl[0])) {
case 2:
switch (tpl[1]) {
case am_alias:
add_oflags &= ~ERTS_ML_STATE_ALIAS_MASK;
switch (tpl[2]) {
case am_explicit_unalias:
add_oflags |= ERTS_ML_STATE_ALIAS_UNALIAS;
break;
case am_demonitor:
add_oflags |= ERTS_ML_STATE_ALIAS_DEMONITOR;
break;
case am_reply_demonitor:
add_oflags |= ERTS_ML_STATE_ALIAS_ONCE;
break;
default:
return (Uint16) ~0;
}
break;
case am_tag:
*tag = tpl[2];
break;
default:
return (Uint16) ~0;
}
break;
default:
return (Uint16) ~0;
}
opts = CDR(cons);
}
if (is_not_nil(opts))
return (Uint16) ~0;
return add_oflags;
}
static BIF_RETTYPE monitor(Process *c_p, Eterm type, Eterm target,
Uint16 add_oflags, Eterm tag)
{
Eterm ref, id, name;
ErtsMonitorData *mdp;
BIF_RETTYPE ret_val;
ref = ((add_oflags & ERTS_ML_STATE_ALIAS_MASK)
? erts_make_pid_ref(c_p)
: erts_make_ref(c_p));
ERTS_BIF_PREP_RET(ret_val, ref); /* Prepare for success... */
if (type == am_process) {
DistEntry *dep;
int byname;
if (is_internal_pid(target)) {
name = NIL;
id = target;
local_process:
if (id != c_p->common.id) {
mdp = erts_monitor_create(ERTS_MON_TYPE_PROC,
ref, c_p->common.id,
id, name, tag);
mdp->origin.flags |= add_oflags;
erts_monitor_tree_insert(&ERTS_P_MONITORS(c_p),
&mdp->origin);
if (is_not_internal_pid(id)
|| !erts_proc_sig_send_monitor(&c_p->common, c_p->common.id,
&mdp->u.target, id)) {
erts_proc_sig_send_monitor_down(NULL, id,
&mdp->u.target,
am_noproc);
}
}
goto done;
}
if (is_atom(target)) {
local_named_process:
name = target;
id = erts_whereis_name_to_id(c_p, target);
goto local_process;
}
if (is_external_pid(target)) {
ErtsDSigSendContext ctx;
int code;
dep = external_pid_dist_entry(target);
if (dep == erts_this_dist_entry) {
mdp = erts_monitor_create(ERTS_MON_TYPE_DIST_PROC, ref,
c_p->common.id, target,
NIL, tag);
mdp->origin.flags |= add_oflags;
erts_monitor_tree_insert(&ERTS_P_MONITORS(c_p), &mdp->origin);
erts_proc_sig_send_monitor_down(NULL, target,
&mdp->u.target, am_noproc);
goto done;
}
id = target;
name = NIL;
byname = 0;
remote_process:
mdp = erts_monitor_create(ERTS_MON_TYPE_DIST_PROC, ref,
c_p->common.id, id, name, tag);
mdp->origin.flags |= add_oflags;
erts_monitor_tree_insert(&ERTS_P_MONITORS(c_p), &mdp->origin);
code = erts_dsig_prepare(&ctx, dep,
c_p, ERTS_PROC_LOCK_MAIN,
ERTS_DSP_RLOCK, 0, 1, 1);
switch (code) {
case ERTS_DSIG_PREP_NOT_ALIVE:
case ERTS_DSIG_PREP_NOT_CONNECTED:
erts_monitor_set_dead_dist(&mdp->u.target, dep->sysname);
erts_proc_sig_send_monitor_down(NULL, id,
&mdp->u.target,
am_noconnection);
code = ERTS_DSIG_SEND_OK;
break;
case ERTS_DSIG_PREP_PENDING:
case ERTS_DSIG_PREP_CONNECTED: {
int inserted = erts_monitor_dist_insert(&mdp->u.target, dep->mld);
ASSERT(inserted); (void)inserted;
erts_de_runlock(dep);
code = erts_dsig_send_monitor(&ctx, c_p->common.id, target, ref);
break;
}
default:
ERTS_ASSERT(! "Invalid dsig prepare result");
code = ERTS_DSIG_SEND_OK;
break;
}
if (byname)
erts_deref_dist_entry(dep);
if (code == ERTS_DSIG_SEND_YIELD)
ERTS_BIF_PREP_YIELD_RETURN(ret_val, c_p, ref);
goto done;
}
if (is_tuple(target)) {
Eterm *tpl = tuple_val(target);
if (arityval(tpl[0]) != 2)
goto badarg;
if (is_not_atom(tpl[1]) || is_not_atom(tpl[2]))
goto badarg;
if (tpl[2] != am_Noname && !erts_is_this_node_alive())
goto badarg;
target = tpl[1];
dep = erts_find_or_insert_dist_entry(tpl[2]);
if (dep == erts_this_dist_entry) {
erts_deref_dist_entry(dep);
goto local_named_process;
}
id = dep->sysname;
name = target;
byname = 1;
goto remote_process;
}
/* badarg... */
}
else if (type == am_port) {
if (is_internal_port(target)) {
Port *prt;
name = NIL;
id = target;
local_port:
mdp = erts_monitor_create(ERTS_MON_TYPE_PORT, ref,
c_p->common.id, id,
name, tag);
mdp->origin.flags |= add_oflags;
erts_monitor_tree_insert(&ERTS_P_MONITORS(c_p), &mdp->origin);
prt = erts_port_lookup(id, ERTS_PORT_SFLGS_INVALID_LOOKUP);
if (!prt || erts_port_monitor(c_p, prt, &mdp->u.target) == ERTS_PORT_OP_DROPPED) {
erts_proc_sig_send_monitor_down(prt ? &prt->common : NULL, id,
&mdp->u.target, am_noproc);
}
goto done;
}
if (is_atom(target)) {
local_named_port:
name = target;
id = erts_whereis_name_to_id(c_p, target);
goto local_port;
}
if (is_external_port(target)) {
if (erts_this_dist_entry == external_port_dist_entry(target)) {
mdp = erts_monitor_create(ERTS_MON_TYPE_DIST_PORT, ref,
c_p->common.id, target,
NIL, tag);
mdp->origin.flags |= add_oflags;
erts_monitor_tree_insert(&ERTS_P_MONITORS(c_p), &mdp->origin);
erts_proc_sig_send_monitor_down(NULL, target, &mdp->u.target, am_noproc);
goto done;
}
goto badarg;
}
if (is_tuple(target)) {
Eterm *tpl = tuple_val(target);
if (arityval(tpl[0]) != 2)
goto badarg;
if (is_not_atom(tpl[1]) || is_not_atom(tpl[2]))
goto badarg;
if (tpl[2] == erts_this_dist_entry->sysname) {
target = tpl[1];
goto local_named_port;
}
}
/* badarg... */
}
else if (type == am_time_offset) {
if (target != am_clock_service)
goto badarg;
mdp = erts_monitor_create(ERTS_MON_TYPE_TIME_OFFSET,
ref, c_p->common.id,
am_clock_service, NIL, tag);
mdp->origin.flags |= add_oflags;
erts_monitor_tree_insert(&ERTS_P_MONITORS(c_p), &mdp->origin);
erts_monitor_time_offset(&mdp->u.target);
goto done;
} else {
c_p->fvalue = am_badtype;
BIF_ERROR(c_p, BADARG | EXF_HAS_EXT_INFO);
}
badarg:
ERTS_BIF_PREP_ERROR(ret_val, c_p, BADARG);
done:
return ret_val;
}
BIF_RETTYPE monitor_2(BIF_ALIST_2)
{
return monitor(BIF_P, BIF_ARG_1, BIF_ARG_2, (Uint16) 0, THE_NON_VALUE);
}
BIF_RETTYPE monitor_3(BIF_ALIST_3)
{
Eterm tag;
Uint16 oflags = erts_monitor_opts(BIF_ARG_3, &tag);
if (oflags == (Uint16) ~0) {
BIF_P->fvalue = am_badopt;
BIF_ERROR(BIF_P, BADARG | EXF_HAS_EXT_INFO);
}
return monitor(BIF_P, BIF_ARG_1, BIF_ARG_2, oflags, tag);
}
/**********************************************************************/
/* this is a combination of the spawn and link BIFs */
BIF_RETTYPE spawn_link_3(BIF_ALIST_3)
{
ErlSpawnOpts so;
Eterm pid;
Eterm tmp_heap[2];
ERTS_SET_DEFAULT_SPAWN_OPTS(&so);
so.flags |= SPO_LINK;
so.opts = CONS(&tmp_heap[0], am_link, so.opts);
pid = erl_create_process(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3, &so);
if (is_non_value(pid)) {
BIF_ERROR(BIF_P, so.error_code);
} else {
if (ERTS_USE_MODIFIED_TIMING()) {
BIF_TRAP2(erts_delay_trap, BIF_P, pid, ERTS_MODIFIED_TIMING_DELAY);
}
BIF_RET(pid);
}
}
/**********************************************************************/
BIF_RETTYPE spawn_opt_4(BIF_ALIST_4)
{
ErlSpawnOpts so;
Eterm pid;
Eterm res;
int opts_error;
/*
* Fail order:
* - Bad types
* - Bad options
*/
opts_error = erts_parse_spawn_opts(&so, BIF_ARG_4, NULL, 0);
if (opts_error) {
Sint arity;
BIF_P->fvalue = am_badopt;
if (is_not_atom(BIF_ARG_1) || is_not_atom(BIF_ARG_2))
BIF_ERROR(BIF_P, BADARG | EXF_HAS_EXT_INFO);
arity = erts_list_length(BIF_ARG_3);
if (arity < 0)
BIF_ERROR(BIF_P, BADARG | EXF_HAS_EXT_INFO);
if (arity > MAX_SMALL)
BIF_ERROR(BIF_P, SYSTEM_LIMIT | EXF_HAS_EXT_INFO);
BIF_ERROR(BIF_P, BADARG | EXF_HAS_EXT_INFO);
}
/*
* Spawn the process.
*/
so.opts = BIF_ARG_4;
so.tag = am_spawn_reply;
pid = erl_create_process(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3, &so);
if (is_non_value(pid)) {
BIF_ERROR(BIF_P, so.error_code);
} else if (so.flags & SPO_MONITOR) {
Eterm* hp = HAlloc(BIF_P, 3);
res = TUPLE2(hp, pid, so.mref);
} else {
res = pid;
}
if (ERTS_USE_MODIFIED_TIMING()) {
BIF_TRAP2(erts_delay_trap, BIF_P, res, ERTS_MODIFIED_TIMING_DELAY);
}
else {
BIF_RET(res);
}
}
/**********************************************************************/
BIF_RETTYPE erts_internal_spawn_request_4(BIF_ALIST_4)
{
ErlSpawnOpts so;
Eterm *hp;
Sint arity;
int opts_error;
Eterm tag, tmp, error;
if (!is_atom(BIF_ARG_1))
goto badarg;
if (!is_atom(BIF_ARG_2))
goto badarg;
arity = erts_list_length(BIF_ARG_3);
if (arity < 0)
goto badarg;
/*
* Fail order:
* - Bad types
* - Bad options
*/
opts_error = erts_parse_spawn_opts(&so, BIF_ARG_4, &tag, !0);
if (arity > MAX_SMALL)
goto system_limit;
if (opts_error) {
if (opts_error > 0) {
/* Return `badopt`, meaning that the Options argument
* is not a proper list. */
BIF_RET(am_badopt);
}
goto badopt;
}
hp = HAlloc(BIF_P, 4 + 4 + 2);
/* Make argument list for erts_internal:spawn_init/1 */
tmp = TUPLE3(hp, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3); hp += 4;
tmp = CONS(hp, tmp, NIL); hp += 2;
so.mfa = TUPLE3(hp, BIF_ARG_1, BIF_ARG_2, make_small(arity)); hp += 4;
so.flags |= SPO_ASYNC;
so.mref = THE_NON_VALUE;
so.tag = tag;
so.opts = BIF_ARG_4;
/*
* Spawn the process.
*/
tmp = erl_create_process(BIF_P, am_erts_internal, am_spawn_init, tmp, &so);
if (is_non_value(tmp)) {
switch (so.error_code) {
case SYSTEM_LIMIT:
goto system_limit;
case BADARG:
default:
ERTS_INTERNAL_ERROR("Unexpected error from erl_create_process()");
BIF_ERROR(BIF_P, EXC_INTERNAL_ERROR);
}
}
ASSERT(is_internal_pid(tmp));
if (ERTS_USE_MODIFIED_TIMING()) {