/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1999-2009. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
/*
* Support functions for tracing.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "sys.h"
#include "erl_vm.h"
#include "global.h"
#include "erl_process.h"
#include "big.h"
#include "bif.h"
#include "dist.h"
#include "beam_bp.h"
#include "error.h"
#include "erl_binary.h"
#include "erl_bits.h"
#if 0
#define DEBUG_PRINTOUTS
#else
#undef DEBUG_PRINTOUTS
#endif
extern Eterm beam_return_to_trace[1]; /* OpCode(i_return_to_trace) */
extern Eterm beam_return_trace[1]; /* OpCode(i_return_trace) */
/* Pseudo export entries. Never filled in with data, only used to
yield unique pointers of the correct type. */
Export exp_send, exp_receive, exp_timeout;
static Eterm system_seq_tracer;
static Uint default_trace_flags;
static Eterm default_tracer;
static Eterm system_monitor;
static Eterm system_profile;
#ifdef HAVE_ERTS_NOW_CPU
int erts_cpu_timestamp;
#endif
static erts_smp_mtx_t smq_mtx;
static erts_smp_mtx_t sys_trace_mtx;
enum ErtsSysMsgType {
SYS_MSG_TYPE_UNDEFINED,
SYS_MSG_TYPE_TRACE,
SYS_MSG_TYPE_SEQTRACE,
SYS_MSG_TYPE_SYSMON,
SYS_MSG_TYPE_ERRLGR,
SYS_MSG_TYPE_PROC_MSG,
SYS_MSG_TYPE_SYSPROF
};
#ifdef ERTS_SMP
static void enqueue_sys_msg_unlocked(enum ErtsSysMsgType type,
Eterm from,
Eterm to,
Eterm msg,
ErlHeapFragment *bp);
static void enqueue_sys_msg(enum ErtsSysMsgType type,
Eterm from,
Eterm to,
Eterm msg,
ErlHeapFragment *bp);
static void init_sys_msg_dispatcher(void);
#endif
void erts_init_trace(void) {
erts_smp_mtx_init(&sys_trace_mtx, "sys_tracers");
#ifdef HAVE_ERTS_NOW_CPU
erts_cpu_timestamp = 0;
#endif
erts_bif_trace_init();
erts_system_monitor_clear(NULL);
erts_system_profile_clear(NULL);
default_trace_flags = F_INITIAL_TRACE_FLAGS;
default_tracer = NIL;
system_seq_tracer = am_false;
#ifdef ERTS_SMP
init_sys_msg_dispatcher();
#endif
}
static Eterm system_seq_tracer;
#ifdef ERTS_SMP
#define ERTS_ALLOC_SYSMSG_HEAP(SZ, BPP, OHPP, UNUSED) \
(*(BPP) = new_message_buffer((SZ)), \
*(OHPP) = &(*(BPP))->off_heap, \
(*(BPP))->mem)
#else
#define ERTS_ALLOC_SYSMSG_HEAP(SZ, BPP, OHPP, RPP) \
erts_alloc_message_heap((SZ), (BPP), (OHPP), (RPP), 0)
#endif
#ifdef ERTS_SMP
#define ERTS_ENQ_TRACE_MSG(FPID, TPID, MSG, BP) \
do { \
ERTS_LC_ASSERT(erts_smp_lc_mtx_is_locked(&smq_mtx)); \
enqueue_sys_msg_unlocked(SYS_MSG_TYPE_TRACE, (FPID), (TPID), (MSG), (BP)); \
} while(0)
#else
#define ERTS_ENQ_TRACE_MSG(FPID, TPROC, MSG, BP) \
erts_queue_message((TPROC), NULL, (BP), (MSG), NIL)
#endif
/*
* NOTE that the ERTS_GET_TRACER_REF() returns from the function (!!!)
* using it, and resets the parameters used if the tracer is invalid, i.e.,
* use it with extreme care!
*/
#ifdef ERTS_SMP
#define ERTS_NULL_TRACER_REF NIL
#define ERTS_TRACER_REF_TYPE Eterm
/* In the smp case, we never find the tracer invalid here (the sys
message dispatcher thread takes care of that). */
#define ERTS_GET_TRACER_REF(RES, TPID, TRACEE_FLGS) \
do { (RES) = (TPID); } while(0)
#else
#define ERTS_NULL_TRACER_REF NULL
#define ERTS_TRACER_REF_TYPE Process *
#define ERTS_GET_TRACER_REF(RES, TPID, TRACEE_FLGS) \
do { \
(RES) = process_tab[internal_pid_index((TPID))]; \
if (INVALID_PID((RES), (TPID)) || !((RES)->trace_flags & F_TRACER)) { \
(TPID) = NIL; \
(TRACEE_FLGS) &= ~TRACEE_FLAGS; \
return; \
} \
} while (0)
#endif
static Uint active_sched;
void
erts_system_profile_setup_active_schedulers(void)
{
ERTS_SMP_LC_ASSERT(erts_is_system_blocked(0));
active_sched = erts_active_schedulers();
}
void
erts_trace_check_exiting(Eterm exiting)
{
erts_smp_mtx_lock(&sys_trace_mtx);
if (exiting == default_tracer) {
default_tracer = NIL;
default_trace_flags &= TRACEE_FLAGS;
#ifdef DEBUG
default_trace_flags |= F_INITIAL_TRACE_FLAGS;
#endif
}
if (exiting == system_seq_tracer) {
#ifdef DEBUG_PRINTOUTS
erts_fprintf(stderr, "seq tracer %T exited\n", exiting);
#endif
system_seq_tracer = am_false;
}
if (exiting == system_monitor) {
#ifdef ERTS_SMP
system_monitor = NIL;
/* Let the trace message dispatcher clear flags, etc */
#else
erts_system_monitor_clear(NULL);
#endif
}
if (exiting == system_profile) {
#ifdef ERTS_SMP
system_profile = NIL;
/* Let the trace message dispatcher clear flags, etc */
#else
erts_system_profile_clear(NULL);
#endif
}
erts_smp_mtx_unlock(&sys_trace_mtx);
}
Eterm
erts_set_system_seq_tracer(Process *c_p, ErtsProcLocks c_p_locks, Eterm new)
{
Eterm old = THE_NON_VALUE;
if (new != am_false) {
if (!erts_pid2proc(c_p, c_p_locks, new, 0)
&& !erts_is_valid_tracer_port(new)) {
return old;
}
}
erts_smp_mtx_lock(&sys_trace_mtx);
old = system_seq_tracer;
system_seq_tracer = new;
#ifdef DEBUG_PRINTOUTS
erts_fprintf(stderr, "set seq tracer new=%T old=%T\n", new, old);
#endif
erts_smp_mtx_unlock(&sys_trace_mtx);
return old;
}
Eterm
erts_get_system_seq_tracer(void)
{
Eterm st;
erts_smp_mtx_lock(&sys_trace_mtx);
st = system_seq_tracer;
#ifdef DEBUG_PRINTOUTS
erts_fprintf(stderr, "get seq tracer %T\n", st);
#endif
erts_smp_mtx_unlock(&sys_trace_mtx);
return st;
}
static ERTS_INLINE void
get_default_tracing(Uint *flagsp, Eterm *tracerp)
{
if (!(default_trace_flags & TRACEE_FLAGS))
default_tracer = NIL;
if (is_nil(default_tracer)) {
default_trace_flags &= ~TRACEE_FLAGS;
} else if (is_internal_pid(default_tracer)) {
if (!erts_pid2proc(NULL, 0, default_tracer, 0)) {
reset_tracer:
default_trace_flags &= ~TRACEE_FLAGS;
default_tracer = NIL;
}
} else {
ASSERT(is_internal_port(default_tracer));
if (!erts_is_valid_tracer_port(default_tracer))
goto reset_tracer;
}
if (flagsp)
*flagsp = default_trace_flags;
if (tracerp)
*tracerp = default_tracer;
}
void
erts_change_default_tracing(int setflags, Uint *flagsp, Eterm *tracerp)
{
erts_smp_mtx_lock(&sys_trace_mtx);
if (flagsp) {
if (setflags)
default_trace_flags |= *flagsp;
else
default_trace_flags &= ~(*flagsp);
}
if (tracerp)
default_tracer = *tracerp;
get_default_tracing(flagsp, tracerp);
erts_smp_mtx_unlock(&sys_trace_mtx);
}
void
erts_get_default_tracing(Uint *flagsp, Eterm *tracerp)
{
erts_smp_mtx_lock(&sys_trace_mtx);
get_default_tracing(flagsp, tracerp);
erts_smp_mtx_unlock(&sys_trace_mtx);
}
void
erts_set_system_monitor(Eterm monitor)
{
erts_smp_mtx_lock(&sys_trace_mtx);
system_monitor = monitor;
erts_smp_mtx_unlock(&sys_trace_mtx);
}
Eterm
erts_get_system_monitor(void)
{
Eterm monitor;
erts_smp_mtx_lock(&sys_trace_mtx);
monitor = system_monitor;
erts_smp_mtx_unlock(&sys_trace_mtx);
return monitor;
}
/* Performance monitoring */
void erts_set_system_profile(Eterm profile) {
erts_smp_mtx_lock(&sys_trace_mtx);
system_profile = profile;
erts_smp_mtx_unlock(&sys_trace_mtx);
}
Eterm
erts_get_system_profile(void) {
Eterm profile;
erts_smp_mtx_lock(&sys_trace_mtx);
profile = system_profile;
erts_smp_mtx_unlock(&sys_trace_mtx);
return profile;
}
#ifdef HAVE_ERTS_NOW_CPU
# define GET_NOW(m, s, u) \
do { \
if (erts_cpu_timestamp) \
erts_get_now_cpu(m, s, u); \
else \
get_now(m, s, u); \
} while (0)
#else
# define GET_NOW(m, s, u) do {get_now(m, s, u);} while (0)
#endif
static Eterm* patch_ts(Eterm tuple4, Eterm* hp);
#ifdef ERTS_SMP
static void
do_send_to_port(Eterm to,
Port* unused_port,
Eterm from,
enum ErtsSysMsgType type,
Eterm message)
{
Uint sz = size_object(message);
ErlHeapFragment *bp = new_message_buffer(sz);
Uint *hp = bp->mem;
Eterm msg = copy_struct(message, sz, &hp, &bp->off_heap);
enqueue_sys_msg_unlocked(type, from, to, msg, bp);
}
#define WRITE_SYS_MSG_TO_PORT write_sys_msg_to_port
#else
#define WRITE_SYS_MSG_TO_PORT do_send_to_port
#endif
static void
WRITE_SYS_MSG_TO_PORT(Eterm unused_to,
Port* trace_port,
Eterm unused_from,
enum ErtsSysMsgType unused_type,
Eterm message) {
byte *buffer;
byte *ptr;
unsigned size;
size = erts_encode_ext_size(message);
buffer = (byte *) erts_alloc(ERTS_ALC_T_TMP, size);
ptr = buffer;
erts_encode_ext(message, &ptr);
if (!(ptr <= buffer+size)) {
erl_exit(1, "Internal error in do_send_to_port: %d\n", ptr-buffer);
}
#ifndef ERTS_SMP
if (!INVALID_TRACER_PORT(trace_port, trace_port->id)) {
#endif
erts_raw_port_command(trace_port, buffer, ptr-buffer);
#ifndef ERTS_SMP
erts_port_release(trace_port);
}
#endif
erts_free(ERTS_ALC_T_TMP, (void *) buffer);
}
#ifndef ERTS_SMP
/* Send {trace_ts, Pid, out, 0, Timestamp}
* followed by {trace_ts, Pid, in, 0, NewTimestamp}
*
* 'NewTimestamp' is fetched from GET_NOW() through patch_ts().
*/
static void
do_send_schedfix_to_port(Port *trace_port, Eterm pid, Eterm timestamp) {
Eterm local_heap[4+5+5];
Eterm message;
Eterm *hp;
Eterm mfarity;
ASSERT(is_pid(pid));
ASSERT(is_tuple(timestamp));
ASSERT(*tuple_val(timestamp) == make_arityval(3));
hp = local_heap;
mfarity = make_small(0);
message = TUPLE5(hp, am_trace_ts, pid, am_out, mfarity, timestamp);
/* Note, hp is deliberately NOT incremented since it will be reused */
do_send_to_port(trace_port->id,
trace_port,
pid,
SYS_MSG_TYPE_UNDEFINED,
message);
message = TUPLE4(hp, am_trace_ts, pid, am_in, mfarity);
hp += 5;
hp = patch_ts(message, hp);
do_send_to_port(trace_port->id,
trace_port,
pid,
SYS_MSG_TYPE_UNDEFINED,
message);
}
#endif
/* If (c_p != NULL), a fake schedule out/in message pair will be sent,
* if the driver so requests.
* It is assumed that 'message' is not an 'out' message.
*
* 'c_p' is the currently executing process, "tracee" is the traced process
* which 'message' concerns => if (*tracee_flags & F_TIMESTAMP),
* 'message' must contain a timestamp.
*/
static void
send_to_port(Process *c_p, Eterm message,
Eterm *tracer_pid, Uint *tracee_flags) {
Port* trace_port;
#ifndef ERTS_SMP
Eterm ts, local_heap[4], *hp;
#endif
ASSERT(is_internal_port(*tracer_pid));
#ifdef ERTS_SMP
if (is_not_internal_port(*tracer_pid))
return;
trace_port = NULL;
#else
if (is_not_internal_port(*tracer_pid))
goto invalid_tracer_port;
trace_port = &erts_port[internal_port_index(*tracer_pid)];
if (INVALID_TRACER_PORT(trace_port, *tracer_pid)) {
invalid_tracer_port:
*tracee_flags &= ~TRACEE_FLAGS;
*tracer_pid = NIL;
return;
}
/*
* Make a fake schedule only if the current process is traced
* with 'running' and 'timestamp'.
*/
if ( c_p == NULL ||
(! IS_TRACED_FL(c_p, F_TRACE_SCHED | F_TIMESTAMP))) {
#endif
do_send_to_port(*tracer_pid,
trace_port,
c_p ? c_p->id : NIL,
SYS_MSG_TYPE_TRACE,
message);
#ifndef ERTS_SMP
return;
}
/*
* Note that the process being traced for some type of trace messages
* (e.g. getting_linked) need not be the current process. That other
* process might not have timestamps enabled.
*/
if (*tracee_flags & F_TIMESTAMP) {
ASSERT(is_tuple(message));
hp = tuple_val(message);
ts = hp[arityval(hp[0])];
} else {
/* A fake schedule might be needed,
* but this message does not contain a timestamp.
* Create a dummy trace message with timestamp to be
* passed to do_send_schedfix_to_port().
*/
Uint ms,s,us;
GET_NOW(&ms, &s, &us);
hp = local_heap;
ts = TUPLE3(hp, make_small(ms), make_small(s), make_small(us));
hp += 4;
}
trace_port->control_flags &= ~PORT_CONTROL_FLAG_HEAVY;
do_send_to_port(*tracer_pid,
trace_port,
c_p ? c_p->id : NIL,
SYS_MSG_TYPE_TRACE,
message);
if (trace_port->control_flags & PORT_CONTROL_FLAG_HEAVY) {
/* The driver has just informed us that the last write took a
* non-neglectible amount of time.
*
* We need to fake some trace messages to compensate for the time the
* current process had to sacrifice for the writing of the previous
* trace message. We pretend that the process got scheduled out
* just after writning the real trace message, and now gets scheduled
* in again.
*/
do_send_schedfix_to_port(trace_port, c_p->id, ts);
}
#endif
}
#ifndef ERTS_SMP
/* Profile send
* Checks if profiler is port or process
* Eterm msg is local, need copying.
*/
static void
profile_send(Eterm message) {
Uint sz = 0;
ErlHeapFragment *bp = NULL;
Uint *hp = NULL;
Eterm msg = NIL;
Process *profile_p = NULL;
ErlOffHeap *off_heap = NULL;
Eterm profiler = erts_get_system_profile();
if (is_internal_port(profiler)) {
Port *profiler_port = NULL;
/* not smp */
profiler_port = &erts_port[internal_port_index(profiler)];
do_send_to_port(profiler,
profiler_port,
NIL, /* or current process->id */
SYS_MSG_TYPE_SYSPROF,
message);
} else {
ASSERT(is_internal_pid(profiler)
&& internal_pid_index(profiler) < erts_max_processes);
profile_p = process_tab[internal_pid_index(profiler)];
if (INVALID_PID(profile_p, profiler)) return;
sz = size_object(message);
hp = erts_alloc_message_heap(sz, &bp, &off_heap, profile_p, 0);
msg = copy_struct(message, sz, &hp, &bp->off_heap);
erts_queue_message(profile_p, NULL, bp, msg, NIL);
}
}
#endif
/* A fake schedule out/in message pair will be sent,
* if the driver so requests.
* If (timestamp == NIL), one is fetched from GET_NOW().
*
* 'c_p' is the currently executing process, may be NULL.
*/
static void
seq_trace_send_to_port(Process *c_p,
Eterm seq_tracer,
Eterm message,
Eterm timestamp)
{
Port* trace_port;
#ifndef ERTS_SMP
Eterm ts, local_heap[4], *hp;
#endif
ASSERT(is_internal_port(seq_tracer));
#ifdef ERTS_SMP
if (is_not_internal_port(seq_tracer))
return;
trace_port = NULL;
#else
if (is_not_internal_port(seq_tracer))
goto invalid_tracer_port;
trace_port = &erts_port[internal_port_index(seq_tracer)];
if (INVALID_TRACER_PORT(trace_port, seq_tracer)) {
invalid_tracer_port:
system_seq_tracer = am_false;
return;
}
if (c_p == NULL
|| (! IS_TRACED_FL(c_p, F_TRACE_SCHED | F_TIMESTAMP))) {
#endif
do_send_to_port(seq_tracer,
trace_port,
c_p ? c_p->id : NIL,
SYS_MSG_TYPE_SEQTRACE,
message);
#ifndef ERTS_SMP
return;
}
/* Make a fake schedule only if the current process is traced
* with 'running' and 'timestamp'.
*/
if (timestamp != NIL) {
ts = timestamp;
} else {
/* A fake schedule might be needed,
* but this message does not contain a timestamp.
* Create a dummy trace message with timestamp to be
* passed to do_send_schedfix_to_port().
*/
Uint ms,s,us;
GET_NOW(&ms, &s, &us);
hp = local_heap;
ts = TUPLE3(hp, make_small(ms), make_small(s), make_small(us));
hp += 4;
}
trace_port->control_flags &= ~PORT_CONTROL_FLAG_HEAVY;
do_send_to_port(seq_tracer,
trace_port,
c_p ? c_p->id : NIL,
SYS_MSG_TYPE_SEQTRACE,
message);
if (trace_port->control_flags & PORT_CONTROL_FLAG_HEAVY) {
/* The driver has just informed us that the last write took a
* non-neglectible amount of time.
*
* We need to fake some trace messages to compensate for the time the
* current process had to sacrifice for the writing of the previous
* trace message. We pretend that the process got scheduled out
* just after writing the real trace message, and now gets scheduled
* in again.
*/
do_send_schedfix_to_port(trace_port, c_p->id, ts);
}
#endif
}
#define TS_HEAP_WORDS 5
#define TS_SIZE(p) (((p)->trace_flags & F_TIMESTAMP) ? TS_HEAP_WORDS : 0)
/*
* Patch a timestamp into a tuple. The tuple must be the last thing
* built on the heap.
*
* Returns the new hp pointer.
*/
static Eterm*
patch_ts(Eterm tuple, Eterm* hp)
{
Uint ms, s, us;
Eterm* ptr = tuple_val(tuple);
int arity = arityval(*ptr);
ASSERT((ptr+arity+1) == hp);
ptr[0] = make_arityval(arity+1);
ptr[1] = am_trace_ts;
GET_NOW(&ms, &s, &us);
*hp = TUPLE3(hp+1, make_small(ms), make_small(s), make_small(us));
return hp+5;
}
static ERTS_INLINE void
send_to_tracer(Process *tracee,
ERTS_TRACER_REF_TYPE tracer_ref,
Eterm msg,
Eterm **hpp,
ErlHeapFragment *bp,
int no_fake_sched)
{
ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(tracee));
erts_smp_mtx_lock(&smq_mtx);
if (tracee->trace_flags & F_TIMESTAMP)
*hpp = patch_ts(msg, *hpp);
if (is_internal_pid(tracee->tracer_proc))
ERTS_ENQ_TRACE_MSG(tracee->id, tracer_ref, msg, bp);
else {
ASSERT(is_internal_port(tracee->tracer_proc));
send_to_port(no_fake_sched ? NULL : tracee,
msg,
&tracee->tracer_proc,
&tracee->trace_flags);
}
erts_smp_mtx_unlock(&smq_mtx);
}
static void
trace_sched_aux(Process *p, Eterm what, int never_fake_sched)
{
Eterm local_heap[5+4+1+TS_HEAP_WORDS];
Eterm tmp, mess, *hp;
ErlHeapFragment *bp = NULL;
ErlOffHeap *off_heap;
ERTS_TRACER_REF_TYPE tracer_ref = ERTS_NULL_TRACER_REF;
int sched_no, curr_func, to_port, no_fake_sched;
if (is_nil(p->tracer_proc))
return;
no_fake_sched = never_fake_sched;
switch (what) {
case am_out:
case am_out_exiting:
case am_out_exited:
no_fake_sched = 1;
break;
case am_in:
case am_in_exiting:
break;
default:
ASSERT(0);
break;
}
sched_no = IS_TRACED_FL(p, F_TRACE_SCHED_NO);
to_port = is_internal_port(p->tracer_proc);
if (!to_port) {
ASSERT(is_internal_pid(p->tracer_proc)
&& internal_pid_index(p->tracer_proc) < erts_max_processes);
ERTS_GET_TRACER_REF(tracer_ref, p->tracer_proc, p->trace_flags);
}
if (ERTS_PROC_IS_EXITING(p)
#ifndef ERTS_SMP
|| p->status == P_FREE
#endif
) {
curr_func = 0;
}
else {
if (!p->current)
p->current = find_function_from_pc(p->i);
curr_func = p->current != NULL;
}
if (to_port)
hp = &local_heap[0];
else {
Uint size = 5;
if (curr_func)
size += 4;
if (sched_no)
size += 1;
size += TS_SIZE(p);
hp = ERTS_ALLOC_SYSMSG_HEAP(size, &bp, &off_heap, tracer_ref);
}
if (!curr_func) {
tmp = make_small(0);
} else {
tmp = TUPLE3(hp,p->current[0],p->current[1],make_small(p->current[2]));
hp += 4;
}
if (!sched_no) {
mess = TUPLE4(hp, am_trace, p->id, what, tmp);
hp += 5;
}
else {
#ifdef ERTS_SMP
Eterm sched_id = make_small(p->scheduler_data->no);
#else
Eterm sched_id = make_small(1);
#endif
mess = TUPLE5(hp, am_trace, p->id, what, sched_id, tmp);
hp += 6;
}
send_to_tracer(p, tracer_ref, mess, &hp, bp, no_fake_sched);
}
/* Send {trace_ts, Pid, What, {Mod, Func, Arity}, Timestamp}
* or {trace, Pid, What, {Mod, Func, Arity}}
*
* where 'What' is supposed to be 'in', 'out', 'in_exiting',
* 'out_exiting', or 'out_exited'.
*/
void
trace_sched(Process *p, Eterm what)
{
trace_sched_aux(p, what, 0);
}
/* Send {trace_ts, Pid, Send, Msg, DestPid, Timestamp}
* or {trace, Pid, Send, Msg, DestPid}
*
* where 'Send' is 'send' or 'send_to_non_existing_process'.
*/
void
trace_send(Process *p, Eterm to, Eterm msg)
{
Eterm operation;
unsigned sz_msg;
unsigned sz_to;
Eterm* hp;
Eterm mess;
if (!ARE_TRACE_FLAGS_ON(p, F_TRACE_SEND)) {
return;
}
operation = am_send;
if (is_internal_pid(to)) {
if (!erts_pid2proc(p, ERTS_PROC_LOCK_MAIN, to, 0))
goto send_to_non_existing_process;
}
else if(is_external_pid(to)
&& external_pid_dist_entry(to) == erts_this_dist_entry) {
char *s;
send_to_non_existing_process:
s = "send_to_non_existing_process";
operation = am_atom_put(s, sys_strlen(s));
}
if (is_internal_port(p->tracer_proc)) {
Eterm local_heap[11];
hp = local_heap;
mess = TUPLE5(hp, am_trace, p->id, operation, msg, to);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if (p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
send_to_port(p, mess, &p->tracer_proc, &p->trace_flags);
erts_smp_mtx_unlock(&smq_mtx);
} else {
Uint need;
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
ERTS_TRACER_REF_TYPE tracer_ref;
ASSERT(is_internal_pid(p->tracer_proc)
&& internal_pid_index(p->tracer_proc) < erts_max_processes);
ERTS_GET_TRACER_REF(tracer_ref, p->tracer_proc, p->trace_flags);
sz_msg = size_object(msg);
sz_to = size_object(to);
need = sz_msg + sz_to + 6 + TS_SIZE(p);
hp = ERTS_ALLOC_SYSMSG_HEAP(need, &bp, &off_heap, tracer_ref);
to = copy_struct(to,
sz_to,
&hp,
off_heap);
msg = copy_struct(msg,
sz_msg,
&hp,
off_heap);
mess = TUPLE5(hp, am_trace, p->id/* Local pid */, operation, msg, to);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if (p->trace_flags & F_TIMESTAMP) {
patch_ts(mess, hp);
}
ERTS_ENQ_TRACE_MSG(p->id, tracer_ref, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
}
/* Send {trace_ts, Pid, receive, Msg, Timestamp}
* or {trace, Pid, receive, Msg}
*/
void
trace_receive(Process *rp, Eterm msg)
{
Eterm mess;
size_t sz_msg;
Eterm* hp;
if (is_internal_port(rp->tracer_proc)) {
Eterm local_heap[10];
hp = local_heap;
mess = TUPLE4(hp, am_trace, rp->id, am_receive, msg);
hp += 5;
erts_smp_mtx_lock(&smq_mtx);
if (rp->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
send_to_port(rp, mess, &rp->tracer_proc, &rp->trace_flags);
erts_smp_mtx_unlock(&smq_mtx);
} else {
Uint hsz;
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
ERTS_TRACER_REF_TYPE tracer_ref;
ASSERT(is_internal_pid(rp->tracer_proc)
&& internal_pid_index(rp->tracer_proc) < erts_max_processes);
ERTS_GET_TRACER_REF(tracer_ref, rp->tracer_proc, rp->trace_flags);
sz_msg = size_object(msg);
hsz = sz_msg + 5 + TS_SIZE(rp);
hp = ERTS_ALLOC_SYSMSG_HEAP(hsz, &bp, &off_heap, tracer_ref);
msg = copy_struct(msg, sz_msg, &hp, off_heap);
mess = TUPLE4(hp, am_trace, rp->id/* Local pid */, am_receive, msg);
hp += 5;
erts_smp_mtx_lock(&smq_mtx);
if (rp->trace_flags & F_TIMESTAMP) {
patch_ts(mess, hp);
}
ERTS_ENQ_TRACE_MSG(rp->id, tracer_ref, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
}
int
seq_trace_update_send(Process *p)
{
Eterm seq_tracer = erts_get_system_seq_tracer();
ASSERT((is_tuple(SEQ_TRACE_TOKEN(p)) || is_nil(SEQ_TRACE_TOKEN(p))));
if ( (p->id == seq_tracer) || (SEQ_TRACE_TOKEN(p) == NIL))
return 0;
SEQ_TRACE_TOKEN_SENDER(p) = p->id; /* Internal pid */
SEQ_TRACE_TOKEN_SERIAL(p) =
make_small(++(p -> seq_trace_clock));
SEQ_TRACE_TOKEN_LASTCNT(p) =
make_small(p -> seq_trace_lastcnt);
return 1;
}
/* Send a sequential trace message to the sequential tracer.
* p is the caller (which contains the trace token),
* msg is the original message, type is trace type (SEQ_TRACE_SEND etc),
* and receiver is the receiver of the message.
*
* The message to be received by the sequential tracer is:
*
* TraceMsg =
* {seq_trace, Label, {Type, {Lastcnt, Serial}, Sender, Receiver, Msg} [,Timestamp] }
*
*/
void
seq_trace_output_generic(Eterm token, Eterm msg, Uint type,
Eterm receiver, Process *process, Eterm exitfrom)
{
Eterm mess;
ErlHeapFragment* bp;
Eterm* hp;
Eterm label;
Eterm lastcnt_serial;
Eterm type_atom;
int sz_exit;
Eterm seq_tracer;
seq_tracer = erts_get_system_seq_tracer();
ASSERT(is_tuple(token) || is_nil(token));
if (SEQ_TRACE_T_SENDER(token) == seq_tracer || token == NIL ||
(process && process->trace_flags & F_SENSITIVE)) {
return;
}
switch (type) {
case SEQ_TRACE_SEND: type_atom = am_send; break;
case SEQ_TRACE_PRINT: type_atom = am_print; break;
case SEQ_TRACE_RECEIVE: type_atom = am_receive; break;
default:
erl_exit(1, "invalid type in seq_trace_output_generic: %d:\n", type);
return; /* To avoid warning */
}
if ((unsigned_val(SEQ_TRACE_T_FLAGS(token)) & type) == 0) {
/* No flags set, nothing to do */
return;
}
if (seq_tracer == am_false) {
return; /* no need to send anything */
}
if (is_internal_port(seq_tracer)) {
Eterm local_heap[64];
hp = local_heap;
label = SEQ_TRACE_T_LABEL(token);
lastcnt_serial = TUPLE2(hp, SEQ_TRACE_T_LASTCNT(token),
SEQ_TRACE_T_SERIAL(token));
hp += 3;
if (exitfrom != NIL) {
msg = TUPLE3(hp, am_EXIT, exitfrom, msg);
hp += 4;
}
mess = TUPLE5(hp, type_atom, lastcnt_serial, SEQ_TRACE_T_SENDER(token),
receiver, msg);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if ((unsigned_val(SEQ_TRACE_T_FLAGS(token)) & SEQ_TRACE_TIMESTAMP) == 0) {
mess = TUPLE3(hp, am_seq_trace, label, mess);
seq_trace_send_to_port(NULL, seq_tracer, mess, NIL);
} else {
Uint ms,s,us,ts;
GET_NOW(&ms, &s, &us);
ts = TUPLE3(hp, make_small(ms),make_small(s), make_small(us));
hp += 4;
mess = TUPLE4(hp, am_seq_trace, label, mess, ts);
seq_trace_send_to_port(process, seq_tracer, mess, ts);
}
erts_smp_mtx_unlock(&smq_mtx);
} else {
#ifndef ERTS_SMP
Process* tracer;
#endif
Eterm sender_copy;
Eterm receiver_copy;
Eterm m2;
Uint sz_label, sz_lastcnt_serial, sz_msg, sz_ts, sz_sender,
sz_exitfrom, sz_receiver;
ASSERT(is_internal_pid(seq_tracer)
&& internal_pid_index(seq_tracer) < erts_max_processes);
#ifndef ERTS_SMP
tracer = process_tab[internal_pid_index(seq_tracer)];
if (INVALID_PID(tracer, tracer->id)) {
system_seq_tracer = am_false;
return; /* no need to send anything */
}
#endif
if (receiver == seq_tracer) {
return; /* no need to send anything */
}
sz_label = size_object(SEQ_TRACE_T_LABEL(token));
sz_sender = size_object(SEQ_TRACE_T_SENDER(token));
sz_receiver = size_object(receiver);
sz_lastcnt_serial = 3; /* TUPLE2 */
sz_msg = size_object(msg);
sz_ts = ((unsigned_val(SEQ_TRACE_T_FLAGS(token)) & SEQ_TRACE_TIMESTAMP) ?
5 : 0);
if (exitfrom != NIL) {
sz_exit = 4; /* create {'EXIT',exitfrom,msg} */
sz_exitfrom = size_object(exitfrom);
}
else {
sz_exit = 0;
sz_exitfrom = 0;
}
bp = new_message_buffer(4 /* TUPLE3 */ + sz_ts + 6 /* TUPLE5 */
+ sz_lastcnt_serial + sz_label + sz_msg
+ sz_exit + sz_exitfrom
+ sz_sender + sz_receiver);
hp = bp->mem;
label = copy_struct(SEQ_TRACE_T_LABEL(token), sz_label, &hp, &bp->off_heap);
lastcnt_serial = TUPLE2(hp,SEQ_TRACE_T_LASTCNT(token),SEQ_TRACE_T_SERIAL(token));
hp += 3;
m2 = copy_struct(msg, sz_msg, &hp, &bp->off_heap);
if (sz_exit) {
Eterm exitfrom_copy = copy_struct(exitfrom,
sz_exitfrom,
&hp,
&bp->off_heap);
m2 = TUPLE3(hp, am_EXIT, exitfrom_copy, m2);
hp += 4;
}
sender_copy = copy_struct(SEQ_TRACE_T_SENDER(token),
sz_sender,
&hp,
&bp->off_heap);
receiver_copy = copy_struct(receiver,
sz_receiver,
&hp,
&bp->off_heap);
mess = TUPLE5(hp,
type_atom,
lastcnt_serial,
sender_copy,
receiver_copy,
m2);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if (sz_ts) {/* timestamp should be included */
Uint ms,s,us,ts;
GET_NOW(&ms, &s, &us);
ts = TUPLE3(hp, make_small(ms),make_small(s), make_small(us));
hp += 4;
mess = TUPLE4(hp, am_seq_trace, label, mess, ts);
} else {
mess = TUPLE3(hp, am_seq_trace, label, mess);
}
#ifdef ERTS_SMP
enqueue_sys_msg_unlocked(SYS_MSG_TYPE_SEQTRACE, NIL, NIL, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
#else
erts_queue_message(tracer, NULL, bp, mess, NIL); /* trace_token must be NIL here */
#endif
}
}
/* Send {trace_ts, Pid, return_to, {Mod, Func, Arity}, Timestamp}
* or {trace, Pid, return_to, {Mod, Func, Arity}}
*/
void
erts_trace_return_to(Process *p, Uint *pc)
{
Eterm* hp;
Eterm mfa;
Eterm mess;
Eterm local_heap[4+5+5];
Eterm *code_ptr = find_function_from_pc(pc);
hp = local_heap;
if (!code_ptr) {
mfa = am_undefined;
} else {
mfa = TUPLE3(hp, code_ptr[0], code_ptr[1], make_small(code_ptr[2]));
hp += 4;
}
mess = TUPLE4(hp, am_trace, p->id, am_return_to, mfa);
hp += 5;
erts_smp_mtx_lock(&smq_mtx);
if (p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
if (is_internal_port(p->tracer_proc)) {
send_to_port(p, mess, &p->tracer_proc, &p->trace_flags);
} else {
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
ERTS_TRACER_REF_TYPE tracer_ref;
unsigned size;
/*
* Find the tracer.
*/
ASSERT(is_internal_pid(p->tracer_proc)
&& internal_pid_index(p->tracer_proc) < erts_max_processes);
ERTS_GET_TRACER_REF(tracer_ref, p->tracer_proc, p->trace_flags);
size = size_object(mess);
hp = ERTS_ALLOC_SYSMSG_HEAP(size, &bp, &off_heap, tracer_ref);
/*
* Copy the trace message into the buffer and enqueue it.
*/
mess = copy_struct(mess, size, &hp, off_heap);
ERTS_ENQ_TRACE_MSG(p->id, tracer_ref, mess, bp);
}
erts_smp_mtx_unlock(&smq_mtx);
}
/* Send {trace_ts, Pid, return_from, {Mod, Name, Arity}, Retval, Timestamp}
* or {trace, Pid, return_from, {Mod, Name, Arity}, Retval}
*/
void
erts_trace_return(Process* p, Eterm* fi, Eterm retval, Eterm *tracer_pid)
{
Eterm* hp;
Eterm mfa;
Eterm mess;
Eterm mod, name;
int arity;
Uint meta_flags, *tracee_flags;
#ifdef ERTS_SMP
Eterm tracee;
#endif
ASSERT(tracer_pid);
if (*tracer_pid == am_true) {
/* Breakpoint trace enabled without specifying tracer =>
* use process tracer and flags
*/
tracer_pid = &p->tracer_proc;
}
if (is_nil(*tracer_pid)) {
/* Trace disabled */
return;
}
ASSERT(is_internal_pid(*tracer_pid) || is_internal_port(*tracer_pid));
if (*tracer_pid == p->id) {
/* Do not generate trace messages to oneself */
return;
}
if (tracer_pid == &p->tracer_proc) {
/* Tracer specified in process structure =>
* non-breakpoint trace =>
* use process flags
*/
tracee_flags = &p->trace_flags;
#ifdef ERTS_SMP
tracee = p->id;
#endif
} else {
/* Tracer not specified in process structure =>
* tracer specified in breakpoint =>
* meta trace =>
* use fixed flag set instead of process flags
*/
meta_flags = F_TRACE_CALLS | F_TIMESTAMP;
tracee_flags = &meta_flags;
#ifdef ERTS_SMP
tracee = NIL;
#endif
}
if (! (*tracee_flags & F_TRACE_CALLS)) {
return;
}
mod = fi[0];
name = fi[1];
arity = fi[2];
if (is_internal_port(*tracer_pid)) {
Eterm local_heap[4+6+5];
hp = local_heap;
mfa = TUPLE3(hp, mod, name, make_small(arity));
hp += 4;
mess = TUPLE5(hp, am_trace, p->id, am_return_from, mfa, retval);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if (*tracee_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
send_to_port(p, mess, tracer_pid, tracee_flags);
erts_smp_mtx_unlock(&smq_mtx);
} else {
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
ERTS_TRACER_REF_TYPE tracer_ref;
unsigned size;
unsigned retval_size;
#ifdef DEBUG
Eterm* limit;
#endif
ASSERT(is_internal_pid(*tracer_pid)
&& internal_pid_index(*tracer_pid) < erts_max_processes);
ERTS_GET_TRACER_REF(tracer_ref, *tracer_pid, *tracee_flags);
retval_size = size_object(retval);
size = 6 + 4 + retval_size;
if (*tracee_flags & F_TIMESTAMP) {
size += 1+4;
}
hp = ERTS_ALLOC_SYSMSG_HEAP(size, &bp, &off_heap, tracer_ref);
#ifdef DEBUG
limit = hp + size;
#endif
/*
* Build the trace tuple and put it into receive queue of the tracer process.
*/
mfa = TUPLE3(hp, mod, name, make_small(arity));
hp += 4;
retval = copy_struct(retval, retval_size, &hp, off_heap);
mess = TUPLE5(hp, am_trace, p->id/* Local pid */, am_return_from, mfa, retval);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if (*tracee_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
ASSERT(hp == limit);
ERTS_ENQ_TRACE_MSG(tracee, tracer_ref, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
}
/* Send {trace_ts, Pid, exception_from, {Mod, Name, Arity}, {Class,Value},
* Timestamp}
* or {trace, Pid, exception_from, {Mod, Name, Arity}, {Class,Value},
* Timestamp}
*
* Where Class is atomic but Value is any term.
*/
void
erts_trace_exception(Process* p, Eterm mfa[3], Eterm class, Eterm value,
Eterm *tracer_pid)
{
Eterm* hp;
Eterm mfa_tuple;
Eterm cv;
Eterm mess;
Uint meta_flags, *tracee_flags;
#ifdef ERTS_SMP
Eterm tracee;
#endif
ASSERT(tracer_pid);
if (*tracer_pid == am_true) {
/* Breakpoint trace enabled without specifying tracer =>
* use process tracer and flags
*/
tracer_pid = &p->tracer_proc;
}
if (is_nil(*tracer_pid)) {
/* Trace disabled */
return;
}
ASSERT(is_internal_pid(*tracer_pid) || is_internal_port(*tracer_pid));
if (*tracer_pid == p->id) {
/* Do not generate trace messages to oneself */
return;
}
if (tracer_pid == &p->tracer_proc) {
/* Tracer specified in process structure =>
* non-breakpoint trace =>
* use process flags
*/
tracee_flags = &p->trace_flags;
#ifdef ERTS_SMP
tracee = p->id;
#endif
if (! (*tracee_flags & F_TRACE_CALLS)) {
return;
}
} else {
/* Tracer not specified in process structure =>
* tracer specified in breakpoint =>
* meta trace =>
* use fixed flag set instead of process flags
*/
meta_flags = F_TRACE_CALLS | F_TIMESTAMP;
tracee_flags = &meta_flags;
#ifdef ERTS_SMP
tracee = NIL;
#endif
}
if (is_internal_port(*tracer_pid)) {
Eterm local_heap[4+3+6+5];
hp = local_heap;
mfa_tuple = TUPLE3(hp, mfa[0], mfa[1], make_small(mfa[2]));
hp += 4;
cv = TUPLE2(hp, class, value);
hp += 3;
mess = TUPLE5(hp, am_trace, p->id, am_exception_from, mfa_tuple, cv);
hp += 6;
ASSERT((hp - local_heap)*sizeof(*hp) <= sizeof(local_heap));
erts_smp_mtx_lock(&smq_mtx);
if (*tracee_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp); /* hp += 5 */
ASSERT((hp - local_heap)*sizeof(*hp) == sizeof(local_heap));
}
send_to_port(p, mess, tracer_pid, tracee_flags);
erts_smp_mtx_unlock(&smq_mtx);
} else {
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
ERTS_TRACER_REF_TYPE tracer_ref;
unsigned size;
unsigned value_size;
#ifdef DEBUG
Eterm* limit;
#endif
ASSERT(is_internal_pid(*tracer_pid)
&& internal_pid_index(*tracer_pid) < erts_max_processes);
ERTS_GET_TRACER_REF(tracer_ref, *tracer_pid, *tracee_flags);
value_size = size_object(value);
size = 6 + 4 + 3 + value_size;
if (*tracee_flags & F_TIMESTAMP) {
size += 1+4;
}
hp = ERTS_ALLOC_SYSMSG_HEAP(size, &bp, &off_heap, tracer_ref);
#ifdef DEBUG
limit = hp + size;
#endif
/*
* Build the trace tuple and put it into receive queue of the tracer process.
*/
mfa_tuple = TUPLE3(hp, mfa[0], mfa[1], make_small(mfa[2]));
hp += 4;
value = copy_struct(value, value_size, &hp, off_heap);
cv = TUPLE2(hp, class, value);
hp += 3;
mess = TUPLE5(hp, am_trace, p->id/* Local pid */,
am_exception_from, mfa_tuple, cv);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if (*tracee_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
ASSERT(hp == limit);
ERTS_ENQ_TRACE_MSG(tracee, tracer_ref, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
}
/*
* This function implements the new call trace.
*
* Send {trace_ts, Pid, call, {Mod, Func, A}, PamResult, Timestamp}
* or {trace_ts, Pid, call, {Mod, Func, A}, Timestamp}
* or {trace, Pid, call, {Mod, Func, A}, PamResult}
* or {trace, Pid, call, {Mod, Func, A}
*
* where 'A' is arity or argument list depending on trace flag 'arity'.
*
* If *tracer_pid is am_true, it is a breakpoint trace that shall use
* the process tracer, if it is NIL no trace message is generated,
* if it is a pid or port we do a meta trace.
*/
Uint32
erts_call_trace(Process* p, Eterm mfa[3], Binary *match_spec,
Eterm* args, int local, Eterm *tracer_pid)
{
Eterm* hp;
Eterm mfa_tuple;
int arity;
int i;
Uint32 return_flags;
Eterm pam_result = am_true;
Eterm mess;
Uint meta_flags, *tracee_flags;
#ifdef ERTS_SMP
Eterm tracee;
#endif
Eterm transformed_args[MAX_ARG];
ErlSubBin sub_bin_heap;
ASSERT(tracer_pid);
if (*tracer_pid == am_true) {
/* Breakpoint trace enabled without specifying tracer =>
* use process tracer and flags
*/
tracer_pid = &p->tracer_proc;
}
if (is_nil(*tracer_pid)) {
/* Trace disabled */
return 0;
}
ASSERT(is_internal_pid(*tracer_pid) || is_internal_port(*tracer_pid));
if (*tracer_pid == p->id) {
/* Do not generate trace messages to oneself */
return 0;
}
if (tracer_pid == &p->tracer_proc) {
/* Tracer specified in process structure =>
* non-breakpoint trace =>
* use process flags
*/
tracee_flags = &p->trace_flags;
#ifdef ERTS_SMP
tracee = p->id;
#endif
} else {
/* Tracer not specified in process structure =>
* tracer specified in breakpoint =>
* meta trace =>
* use fixed flag set instead of process flags
*/
if (p->trace_flags & F_SENSITIVE) {
/* No trace messages for sensitive processes. */
return 0;
}
meta_flags = F_TRACE_CALLS | F_TIMESTAMP;
tracee_flags = &meta_flags;
#ifdef ERTS_SMP
tracee = NIL;
#endif
}
/*
* Because of the delayed sub-binary creation optimization introduced in
* R12B, (at most) one of arguments can be a match context instead of
* a binary. Since we don't want to handle match contexts in utility functions
* such as size_object() and copy_struct(), we must make sure that we
* temporarily convert any match contexts to sub binaries.
*/
arity = mfa[2];
#ifdef DEBUG
sub_bin_heap.thing_word = 0;
#endif
for (i = 0; i < arity; i++) {
Eterm arg = args[i];
if (is_boxed(arg) && header_is_bin_matchstate(*boxed_val(arg))) {
ErlBinMatchState* ms = (ErlBinMatchState *) boxed_val(arg);
ErlBinMatchBuffer* mb = &ms->mb;
ErlSubBin* sb = &sub_bin_heap;
Uint bit_size;
ASSERT(sub_bin_heap.thing_word == 0); /* At most one of match context */
bit_size = mb->size - mb->offset;
sb->thing_word = HEADER_SUB_BIN;
sb->size = BYTE_OFFSET(bit_size);
sb->bitsize = BIT_OFFSET(bit_size);
sb->offs = BYTE_OFFSET(mb->offset);
sb->bitoffs = BIT_OFFSET(mb->offset);
sb->is_writable = 0;
sb->orig = mb->orig;
arg = make_binary(sb);
}
transformed_args[i] = arg;
}
args = transformed_args;
if (is_internal_port(*tracer_pid)) {
Eterm local_heap[64+MAX_ARG];
hp = local_heap;
if (!erts_is_valid_tracer_port(*tracer_pid)) {
#ifdef ERTS_SMP
ASSERT(is_nil(tracee) || tracer_pid == &p->tracer_proc);
if (is_not_nil(tracee))
erts_smp_proc_lock(p, ERTS_PROC_LOCKS_ALL_MINOR);
#endif
*tracee_flags &= ~TRACEE_FLAGS;
*tracer_pid = NIL;
#ifdef ERTS_SMP
if (is_not_nil(tracee))
erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL_MINOR);
#endif
return 0;
}
/*
* If there is a PAM program, run it. Return if it fails.
*
* Some precedence rules:
*
* - No proc flags, e.g 'silent' or 'return_to'
* has any effect on meta trace.
* - The 'silent' process trace flag silences all call
* related messages, e.g 'call', 'return_to' and 'return_from'.
* - The {message,_} PAM function does not affect {return_trace}.
* - The {message,false} PAM function shall give the same
* 'call' trace message as no PAM match.
* - The {message,true} PAM function shall give the same
* 'call' trace message as a nonexistent PAM program.
*/
/* BEGIN this code should be the same for port and pid trace */
return_flags = 0;
if (match_spec) {
pam_result = erts_match_set_run(p, match_spec, args, arity,
&return_flags);
if (is_non_value(pam_result)) {
erts_match_set_release_result(p);
return 0;
}
}
if (tracee_flags == &meta_flags) {
/* Meta trace */
if (pam_result == am_false) {
erts_match_set_release_result(p);
return return_flags;
}
} else {
/* Non-meta trace */
if (*tracee_flags & F_TRACE_SILENT) {
erts_match_set_release_result(p);
return 0;
}
if (pam_result == am_false) {
erts_match_set_release_result(p);
return return_flags;
}
if (local && (*tracee_flags & F_TRACE_RETURN_TO)) {
return_flags |= MATCH_SET_RETURN_TO_TRACE;
}
}
/* END this code should be the same for port and pid trace */
/*
* Build the the {M,F,A} tuple in the local heap.
* (A is arguments or arity.)
*/
if (*tracee_flags & F_TRACE_ARITY_ONLY) {
mfa_tuple = make_small(arity);
} else {
mfa_tuple = NIL;
for (i = arity-1; i >= 0; i--) {
mfa_tuple = CONS(hp, args[i], mfa_tuple);
hp += 2;
}
}
mfa_tuple = TUPLE3(hp, mfa[0], mfa[1], mfa_tuple);
hp += 4;
/*
* Build the trace tuple and send it to the port.
*/
mess = TUPLE4(hp, am_trace, p->id, am_call, mfa_tuple);
hp += 5;
if (pam_result != am_true) {
hp[-5] = make_arityval(5);
*hp++ = pam_result;
}
erts_smp_mtx_lock(&smq_mtx);
if (*tracee_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
send_to_port(p, mess, tracer_pid, tracee_flags);
erts_smp_mtx_unlock(&smq_mtx);
erts_match_set_release_result(p);
return *tracer_pid == NIL ? 0 : return_flags;
} else {
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
Process *tracer;
ERTS_TRACER_REF_TYPE tracer_ref;
#ifdef ERTS_SMP
Eterm tpid;
#endif
unsigned size;
unsigned sizes[MAX_ARG];
unsigned pam_result_size = 0;
int invalid_tracer;
#ifdef DEBUG
Eterm* limit;
#endif
ASSERT(is_internal_pid(*tracer_pid)
&& internal_pid_index(*tracer_pid) < erts_max_processes);
tracer = erts_pid2proc(p, ERTS_PROC_LOCK_MAIN,
*tracer_pid, ERTS_PROC_LOCK_STATUS);
if (!tracer)
invalid_tracer = 1;
else {
invalid_tracer = (tracer->trace_flags & F_TRACER) == 0;
erts_smp_proc_unlock(tracer, ERTS_PROC_LOCK_STATUS);
}
if (invalid_tracer) {
#ifdef ERTS_SMP
ASSERT(is_nil(tracee) || tracer_pid == &p->tracer_proc);
if (is_not_nil(tracee))
erts_smp_proc_lock(p, ERTS_PROC_LOCKS_ALL_MINOR);
#endif
*tracee_flags &= ~TRACEE_FLAGS;
*tracer_pid = NIL;
#ifdef ERTS_SMP
if (is_not_nil(tracee))
erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL_MINOR);
#endif
return 0;
}
#ifdef ERTS_SMP
tpid = *tracer_pid; /* Need to save tracer pid,
since *tracer_pid might
be reset by erts_match_set_run() */
tracer_ref = tpid;
#else
tracer_ref = tracer;
#endif
/*
* If there is a PAM program, run it. Return if it fails.
*
* See the rules above in the port trace code.
*/
/* BEGIN this code should be the same for port and pid trace */
return_flags = 0;
if (match_spec) {
pam_result = erts_match_set_run(p, match_spec, args, arity,
&return_flags);
if (is_non_value(pam_result)) {
erts_match_set_release_result(p);
return 0;
}
}
if (tracee_flags == &meta_flags) {
/* Meta trace */
if (pam_result == am_false) {
erts_match_set_release_result(p);
return return_flags;
}
} else {
/* Non-meta trace */
if (*tracee_flags & F_TRACE_SILENT) {
erts_match_set_release_result(p);
return 0;
}
if (pam_result == am_false) {
erts_match_set_release_result(p);
return return_flags;
}
if (local && (*tracee_flags & F_TRACE_RETURN_TO)) {
return_flags |= MATCH_SET_RETURN_TO_TRACE;
}
}
/* END this code should be the same for port and pid trace */
/*
* Calculate number of words needed on heap.
*/
size = 4 + 5; /* Trace tuple + MFA tuple. */
if (! (*tracee_flags & F_TRACE_ARITY_ONLY)) {
size += 2*arity;
for (i = arity-1; i >= 0; i--) {
sizes[i] = size_object(args[i]);
size += sizes[i];
}
}
if (*tracee_flags & F_TIMESTAMP) {
size += 1 + 4;
/* One element in trace tuple + timestamp tuple. */
}
if (pam_result != am_true) {
pam_result_size = size_object(pam_result);
size += 1 + pam_result_size;
/* One element in trace tuple + term size. */
}
hp = ERTS_ALLOC_SYSMSG_HEAP(size, &bp, &off_heap, tracer_ref);
#ifdef DEBUG
limit = hp + size;
#endif
/*
* Build the the {M,F,A} tuple in the message buffer.
* (A is arguments or arity.)
*/
if (*tracee_flags & F_TRACE_ARITY_ONLY) {
mfa_tuple = make_small(arity);
} else {
mfa_tuple = NIL;
for (i = arity-1; i >= 0; i--) {
Eterm term = copy_struct(args[i], sizes[i], &hp, off_heap);
mfa_tuple = CONS(hp, term, mfa_tuple);
hp += 2;
}
}
mfa_tuple = TUPLE3(hp, mfa[0], mfa[1], mfa_tuple);
hp += 4;
/*
* Copy the PAM result (if any) onto the heap.
*/
if (pam_result != am_true) {
pam_result = copy_struct(pam_result, pam_result_size, &hp, off_heap);
}
erts_match_set_release_result(p);
/*
* Build the trace tuple and enqueue it.
*/
mess = TUPLE4(hp, am_trace, p->id/* Local pid */, am_call, mfa_tuple);
hp += 5;
if (pam_result != am_true) {
hp[-5] = make_arityval(5);
*hp++ = pam_result;
}
erts_smp_mtx_lock(&smq_mtx);
if (*tracee_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
ASSERT(hp == limit);
ERTS_ENQ_TRACE_MSG(tracee, tracer_ref, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
return return_flags;
}
}
/* Sends trace message:
* {trace_ts, ProcessPid, What, Data, Timestamp}
* or {trace, ProcessPid, What, Data}
*
* 'what' must be atomic, 'data' may be a deep term.
* 'c_p' is the currently executing process, may be NULL.
* 't_p' is the traced process.
*/
void
trace_proc(Process *c_p, Process *t_p, Eterm what, Eterm data)
{
Eterm mess;
Eterm* hp;
int need;
if (is_internal_port(t_p->tracer_proc)) {
Eterm local_heap[5+5];
hp = local_heap;
mess = TUPLE4(hp, am_trace, t_p->id, what, data);
hp += 5;
erts_smp_mtx_lock(&smq_mtx);
if (t_p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
send_to_port(
#ifndef ERTS_SMP
/* No fake schedule out and in again after an exit */
what == am_exit ? NULL : c_p,
#else
/* Fake schedule out and in are never sent when smp enabled */
c_p,
#endif
mess, &t_p->tracer_proc, &t_p->trace_flags);
erts_smp_mtx_unlock(&smq_mtx);
} else {
Eterm tmp;
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
ERTS_TRACER_REF_TYPE tracer_ref;
size_t sz_data;
ASSERT(is_internal_pid(t_p->tracer_proc)
&& internal_pid_index(t_p->tracer_proc) < erts_max_processes);
ERTS_GET_TRACER_REF(tracer_ref, t_p->tracer_proc, t_p->trace_flags);
sz_data = size_object(data);
need = sz_data + 5 + TS_SIZE(t_p);
hp = ERTS_ALLOC_SYSMSG_HEAP(need, &bp, &off_heap, tracer_ref);
tmp = copy_struct(data, sz_data, &hp, off_heap);
mess = TUPLE4(hp, am_trace, t_p->id/* Local pid */, what, tmp);
hp += 5;
erts_smp_mtx_lock(&smq_mtx);
if (t_p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
ERTS_ENQ_TRACE_MSG(t_p->id, tracer_ref, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
}
/* Sends trace message:
* {trace_ts, ParentPid, spawn, ChildPid, {Mod, Func, Args}, Timestamp}
* or {trace, ParentPid, spawn, ChildPid, {Mod, Func, Args}}
*
* 'pid' is the ChildPid, 'mod' and 'func' must be atomic,
* and 'args' may be a deep term.
*/
void
trace_proc_spawn(Process *p, Eterm pid,
Eterm mod, Eterm func, Eterm args)
{
Eterm mfa;
Eterm mess;
Eterm* hp;
if (is_internal_port(p->tracer_proc)) {
Eterm local_heap[4+6+5];
hp = local_heap;
mfa = TUPLE3(hp, mod, func, args);
hp += 4;
mess = TUPLE5(hp, am_trace, p->id, am_spawn, pid, mfa);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if (p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
send_to_port(p, mess, &p->tracer_proc, &p->trace_flags);
erts_smp_mtx_unlock(&smq_mtx);
} else {
Eterm tmp;
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
ERTS_TRACER_REF_TYPE tracer_ref;
size_t sz_args, sz_pid;
Uint need;
ASSERT(is_internal_pid(p->tracer_proc)
&& internal_pid_index(p->tracer_proc) < erts_max_processes);
ERTS_GET_TRACER_REF(tracer_ref, p->tracer_proc, p->trace_flags);
sz_args = size_object(args);
sz_pid = size_object(pid);
need = sz_args + 4 + 6 + TS_SIZE(p);
hp = ERTS_ALLOC_SYSMSG_HEAP(need, &bp, &off_heap, tracer_ref);
tmp = copy_struct(args, sz_args, &hp, off_heap);
mfa = TUPLE3(hp, mod, func, tmp);
hp += 4;
tmp = copy_struct(pid, sz_pid, &hp, off_heap);
mess = TUPLE5(hp, am_trace, p->id, am_spawn, tmp, mfa);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if (p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
ERTS_ENQ_TRACE_MSG(p->id, tracer_ref, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
}
void save_calls(Process *p, Export *e)
{
struct saved_calls *scb = ERTS_PROC_GET_SAVED_CALLS_BUF(p);
if (scb) {
Export **ct = &scb->ct[0];
int len = scb->len;
ct[scb->cur] = e;
if (++scb->cur >= len)
scb->cur = 0;
if (scb->n < len)
scb->n++;
}
}
/*
* 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 arg1, Eterm arg2, Eterm arg3, Uint *I)
{
Eterm result;
int meta = !!(erts_bif_trace_flags[bif_index] & BIF_TRACE_AS_META);
ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p);
if (!ARE_TRACE_FLAGS_ON(p, F_TRACE_CALLS) && (! meta)) {
/* Warning! This is an Optimization.
*
* If neither meta trace is active nor process trace flags then
* no tracing will occur. Doing the whole else branch will
* also do nothing, only slower.
*/
Eterm (*func)(Process*, Eterm, Eterm, Eterm, Uint*) = bif_table[bif_index].f;
result = func(p, arg1, arg2, arg3, I);
} else {
Eterm (*func)(Process*, Eterm, Eterm, Eterm, Uint*);
Export* ep = bif_export[bif_index];
Uint32 flags = 0, flags_meta = 0;
int global = !!(erts_bif_trace_flags[bif_index] & BIF_TRACE_AS_GLOBAL);
int local = !!(erts_bif_trace_flags[bif_index] & BIF_TRACE_AS_LOCAL);
Eterm meta_tracer_pid = NIL;
int applying = (I == &(ep->code[3])); /* Yup, the apply code for a bif
* is actually in the
* export entry */
Eterm *cp = p->cp;
#ifndef _OSE_
Eterm args[3] = {arg1, arg2, arg3};
#else
Eterm args[3];
args[0] = arg1;
args[1] = arg2;
args[2] = arg3;
#endif
/*
* 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 (global || local) {
flags = erts_call_trace(p, ep->code, ep->match_prog_set, args,
local, &p->tracer_proc);
}
if (meta) {
flags_meta = erts_bif_mtrace(p, ep->code+3, args, local,
&meta_tracer_pid);
}
/* Restore original continuation pointer (if changed). */
p->cp = cp;
func = bif_table[bif_index].f;
result = func(p, arg1, arg2, arg3, I);
if (applying && (flags & MATCH_SET_RETURN_TO_TRACE)) {
Uint i_return_trace = beam_return_trace[0];
Uint i_return_to_trace = beam_return_to_trace[0];
Eterm *cpp;
/* Maybe advance cp to skip trace stack frames */
for (cpp = p->stop; ; cp = cp_val(*cpp++)) {
ASSERT(is_CP((Eterm) cp));
if (*cp_val((Eterm) cp) == i_return_trace) {
/* Skip stack frame variables */
while (is_not_CP(*cpp)) cpp++;
cpp += 2; /* Skip return_trace parameters */
} else if (*cp_val((Eterm) 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;
Eterm nocatch[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,
&p->tracer_proc);
}
if ((flags & MATCH_SET_RETURN_TO_TRACE) && p->catches > 0) {
/* can only happen if(local)*/
Eterm *ptr = p->stop;
ASSERT(is_CP(*ptr));
ASSERT(ptr <= STACK_START(p));
/* Search the nearest stack frame for a catch */
while (++ptr < STACK_START(p)) {
if (is_CP(*ptr)) break;
if (is_catch(*ptr)) {
if (applying) {
/* Apply of BIF, cp is in calling function */
if (cp) erts_trace_return_to(p, cp);
} else {
/* Direct bif call, I points into
* calling function */
erts_trace_return_to(p, I);
}
}
}
}
if ((flags_meta|flags) & MATCH_SET_EXCEPTION_TRACE) {
erts_smp_proc_lock(p, ERTS_PROC_LOCKS_ALL_MINOR);
p->trace_flags |= F_EXCEPTION_TRACE;
erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL_MINOR);
}
}
} else {
if (flags_meta & MATCH_SET_RX_TRACE) {
erts_trace_return(p, ep->code, result, &meta_tracer_pid);
}
/* MATCH_SET_RETURN_TO_TRACE cannot occur if(meta) */
if (flags & MATCH_SET_RX_TRACE) {
erts_trace_return(p, ep->code, result, &p->tracer_proc);
}
if (flags & MATCH_SET_RETURN_TO_TRACE) {
/* can only happen if(local)*/
if (applying) {
/* Apply of BIF, cp is in calling function */
if (cp) erts_trace_return_to(p, cp);
} else {
/* Direct bif call, I points into calling function */
erts_trace_return_to(p, I);
}
}
}
}
ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p);
return result;
}
/* Sends trace message:
* {trace_ts, Pid, What, Msg, Timestamp}
* or {trace, Pid, What, Msg}
*
* where 'What' must be atomic and 'Msg' is:
* [{heap_size, HeapSize}, {old_heap_size, OldHeapSize},
* {stack_size, StackSize}, {recent_size, RecentSize},
* {mbuf_size, MbufSize}]
*
* where 'HeapSize', 'OldHeapSize', 'StackSize', 'RecentSize and 'MbufSize'
* are all small (atomic) integers.
*/
void
trace_gc(Process *p, Eterm what)
{
ERTS_DECL_AM(bin_vheap_size);
ERTS_DECL_AM(bin_vheap_block_size);
ERTS_DECL_AM(bin_old_vheap_size);
ERTS_DECL_AM(bin_old_vheap_block_size);
ErlHeapFragment *bp = NULL;
ErlOffHeap *off_heap;
ERTS_TRACER_REF_TYPE tracer_ref = ERTS_NULL_TRACER_REF; /* Initialized
to eliminate
compiler
warning */
Eterm* hp;
Eterm msg = NIL;
Uint size;
Eterm tags[] = {
am_old_heap_block_size,
am_heap_block_size,
am_mbuf_size,
am_recent_size,
am_stack_size,
am_old_heap_size,
am_heap_size,
AM_bin_vheap_size,
AM_bin_vheap_block_size,
AM_bin_old_vheap_size,
AM_bin_old_vheap_block_size
};
Uint values[] = {
OLD_HEAP(p) ? OLD_HEND(p) - OLD_HEAP(p) : 0,
HEAP_SIZE(p),
MBUF_SIZE(p),
HIGH_WATER(p) - HEAP_START(p),
STACK_START(p) - p->stop,
OLD_HEAP(p) ? OLD_HTOP(p) - OLD_HEAP(p) : 0,
HEAP_TOP(p) - HEAP_START(p),
MSO(p).overhead,
BIN_VHEAP_SZ(p),
BIN_OLD_VHEAP(p),
BIN_OLD_VHEAP_SZ(p)
};
Eterm local_heap[(sizeof(values)/sizeof(Uint))
*(2/*cons*/ + 3/*2-tuple*/ + BIG_UINT_HEAP_SIZE)
+ 5/*4-tuple */ + TS_HEAP_WORDS];
#ifdef DEBUG
Eterm* limit;
#endif
ASSERT(sizeof(values)/sizeof(Uint) == sizeof(tags)/sizeof(Eterm));
if (is_internal_port(p->tracer_proc)) {
hp = local_heap;
#ifdef DEBUG
size = 0;
(void) erts_bld_atom_uint_2tup_list(NULL,
&size,
sizeof(values)/sizeof(Uint),
tags,
values);
size += 5/*4-tuple*/ + TS_SIZE(p);
#endif
} else {
ASSERT(is_internal_pid(p->tracer_proc)
&& internal_pid_index(p->tracer_proc) < erts_max_processes);
ERTS_GET_TRACER_REF(tracer_ref, p->tracer_proc, p->trace_flags);
size = 0;
(void) erts_bld_atom_uint_2tup_list(NULL,
&size,
sizeof(values)/sizeof(Uint),
tags,
values);
size += 5/*4-tuple*/ + TS_SIZE(p);
hp = ERTS_ALLOC_SYSMSG_HEAP(size, &bp, &off_heap, tracer_ref);
}
#ifdef DEBUG
limit = hp + size;
ASSERT(size <= sizeof(local_heap)/sizeof(Eterm));
#endif
msg = erts_bld_atom_uint_2tup_list(&hp,
NULL,
sizeof(values)/sizeof(Uint),
tags,
values);
msg = TUPLE4(hp, am_trace, p->id/* Local pid */, what, msg);
hp += 5;
erts_smp_mtx_lock(&smq_mtx);
if (p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(msg, hp);
}
ASSERT(hp == limit);
if (is_internal_port(p->tracer_proc))
send_to_port(p, msg, &p->tracer_proc, &p->trace_flags);
else
ERTS_ENQ_TRACE_MSG(p->id, tracer_ref, msg, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
void
monitor_long_gc(Process *p, Uint time) {
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
#ifndef ERTS_SMP
Process *monitor_p;
#endif
Uint hsz;
Eterm *hp, list, msg;
Eterm tags[] = {
am_timeout,
am_old_heap_block_size,
am_heap_block_size,
am_mbuf_size,
am_stack_size,
am_old_heap_size,
am_heap_size
};
Eterm values[] = {
time,
OLD_HEAP(p) ? OLD_HEND(p) - OLD_HEAP(p) : 0,
HEAP_SIZE(p),
MBUF_SIZE(p),
STACK_START(p) - p->stop,
OLD_HEAP(p) ? OLD_HTOP(p) - OLD_HEAP(p) : 0,
HEAP_TOP(p) - HEAP_START(p)
};
#ifdef DEBUG
Eterm *hp_end;
#endif
#ifndef ERTS_SMP
ASSERT(is_internal_pid(system_monitor)
&& internal_pid_index(system_monitor) < erts_max_processes);
monitor_p = process_tab[internal_pid_index(system_monitor)];
if (INVALID_PID(monitor_p, system_monitor) || p == monitor_p) {
return;
}
#endif
hsz = 0;
(void) erts_bld_atom_uint_2tup_list(NULL,
&hsz,
sizeof(values)/sizeof(Uint),
tags,
values);
hsz += 5 /* 4-tuple */;
hp = ERTS_ALLOC_SYSMSG_HEAP(hsz, &bp, &off_heap, monitor_p);
#ifdef DEBUG
hp_end = hp + hsz;
#endif
list = erts_bld_atom_uint_2tup_list(&hp,
NULL,
sizeof(values)/sizeof(Uint),
tags,
values);
msg = TUPLE4(hp, am_monitor, p->id/* Local pid */, am_long_gc, list);
#ifdef DEBUG
hp += 5 /* 4-tuple */;
ASSERT(hp == hp_end);
#endif
#ifdef ERTS_SMP
enqueue_sys_msg(SYS_MSG_TYPE_SYSMON, p->id, NIL, msg, bp);
#else
erts_queue_message(monitor_p, NULL, bp, msg, NIL);
#endif
}
void
monitor_large_heap(Process *p) {
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
#ifndef ERTS_SMP
Process *monitor_p;
#endif
Uint hsz;
Eterm *hp, list, msg;
Eterm tags[] = {
am_old_heap_block_size,
am_heap_block_size,
am_mbuf_size,
am_stack_size,
am_old_heap_size,
am_heap_size
};
Uint values[] = {
OLD_HEAP(p) ? OLD_HEND(p) - OLD_HEAP(p) : 0,
HEAP_SIZE(p),
MBUF_SIZE(p),
STACK_START(p) - p->stop,
OLD_HEAP(p) ? OLD_HTOP(p) - OLD_HEAP(p) : 0,
HEAP_TOP(p) - HEAP_START(p)
};
#ifdef DEBUG
Eterm *hp_end;
#endif
#ifndef ERTS_SMP
ASSERT(is_internal_pid(system_monitor)
&& internal_pid_index(system_monitor) < erts_max_processes);
monitor_p = process_tab[internal_pid_index(system_monitor)];
if (INVALID_PID(monitor_p, system_monitor) || p == monitor_p) {
return;
}
#endif
hsz = 0;
(void) erts_bld_atom_uint_2tup_list(NULL,
&hsz,
sizeof(values)/sizeof(Uint),
tags,
values);
hsz += 5 /* 4-tuple */;
hp = ERTS_ALLOC_SYSMSG_HEAP(hsz, &bp, &off_heap, monitor_p);
#ifdef DEBUG
hp_end = hp + hsz;
#endif
list = erts_bld_atom_uint_2tup_list(&hp,
NULL,
sizeof(values)/sizeof(Uint),
tags,
values);
msg = TUPLE4(hp, am_monitor, p->id/* Local pid */, am_large_heap, list);
#ifdef DEBUG
hp += 5 /* 4-tuple */;
ASSERT(hp == hp_end);
#endif
#ifdef ERTS_SMP
enqueue_sys_msg(SYS_MSG_TYPE_SYSMON, p->id, NIL, msg, bp);
#else
erts_queue_message(monitor_p, NULL, bp, msg, NIL);
#endif
}
void
monitor_generic(Process *p, Eterm type, Eterm spec) {
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
#ifndef ERTS_SMP
Process *monitor_p;
#endif
Eterm *hp, msg;
#ifndef ERTS_SMP
ASSERT(is_internal_pid(system_monitor)
&& internal_pid_index(system_monitor) < erts_max_processes);
monitor_p = process_tab[internal_pid_index(system_monitor)];
if (INVALID_PID(monitor_p, system_monitor) || p == monitor_p) {
return;
}
#endif
hp = ERTS_ALLOC_SYSMSG_HEAP(5, &bp, &off_heap, monitor_p);
msg = TUPLE4(hp, am_monitor, p->id/* Local pid */, type, spec);
hp += 5;
#ifdef ERTS_SMP
enqueue_sys_msg(SYS_MSG_TYPE_SYSMON, p->id, NIL, msg, bp);
#else
erts_queue_message(monitor_p, NULL, bp, msg, NIL);
#endif
}
/* Begin system_profile tracing */
/* Scheduler profiling */
void
profile_scheduler(Eterm scheduler_id, Eterm state) {
Eterm *hp, msg, timestamp;
Uint Ms, s, us;
#ifndef ERTS_SMP
Eterm local_heap[4 + 7];
hp = local_heap;
#else
ErlHeapFragment *bp;
Uint hsz;
hsz = 4 + 7;
bp = new_message_buffer(hsz);
hp = bp->mem;
#endif
erts_smp_mtx_lock(&smq_mtx);
switch (state) {
case am_active:
active_sched++;
break;
case am_inactive:
active_sched--;
break;
default:
ASSERT(!"Invalid state");
break;
}
GET_NOW(&Ms, &s, &us);
timestamp = TUPLE3(hp, make_small(Ms), make_small(s), make_small(us)); hp += 4;
msg = TUPLE6(hp, am_profile, am_scheduler, scheduler_id, state,
make_small(active_sched), timestamp); hp += 7;
#ifndef ERTS_SMP
profile_send(msg);
#else
enqueue_sys_msg_unlocked(SYS_MSG_TYPE_SYSPROF, NIL, NIL, msg, bp);
#endif
erts_smp_mtx_unlock(&smq_mtx);
}
void
profile_scheduler_q(Eterm scheduler_id, Eterm state, Eterm no_schedulers, Uint Ms, Uint s, Uint us) {
Eterm *hp, msg, timestamp;
#ifndef ERTS_SMP
Eterm local_heap[4 + 7];
hp = local_heap;
#else
ErlHeapFragment *bp;
Uint hsz;
hsz = 4 + 7;
bp = new_message_buffer(hsz);
hp = bp->mem;
#endif
erts_smp_mtx_lock(&smq_mtx);
timestamp = TUPLE3(hp, make_small(Ms), make_small(s), make_small(us)); hp += 4;
msg = TUPLE6(hp, am_profile, am_scheduler, scheduler_id, state, no_schedulers, timestamp); hp += 7;
#ifndef ERTS_SMP
profile_send(msg);
#else
enqueue_sys_msg_unlocked(SYS_MSG_TYPE_SYSPROF, NIL, NIL, msg, bp);
#endif
erts_smp_mtx_unlock(&smq_mtx);
}
/* Send {trace_ts, Pid, What, {Mod, Func, Arity}, Timestamp}
* or {trace, Pid, What, {Mod, Func, Arity}}
*
* where 'What' is supposed to be 'in' or 'out'.
*
* Virtual scheduling do not fake scheduling for ports.
*/
void trace_virtual_sched(Process *p, Eterm what)
{
trace_sched_aux(p, what, 1);
}
/* Port profiling */
void
trace_port_open(Port *p, Eterm calling_pid, Eterm drv_name) {
Eterm mess;
Eterm* hp;
if (is_internal_port(p->tracer_proc)) {
Eterm local_heap[5+6];
hp = local_heap;
mess = TUPLE5(hp, am_trace, calling_pid, am_open, p->id, drv_name);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if (p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
/* No fake schedule */
send_to_port(NULL, mess, &p->tracer_proc, &p->trace_flags);
erts_smp_mtx_unlock(&smq_mtx);
} else {
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
size_t sz_data;
ERTS_TRACER_REF_TYPE tracer_ref;
ASSERT(is_internal_pid(p->tracer_proc)
&& internal_pid_index(p->tracer_proc) < erts_max_processes);
sz_data = 6 + TS_SIZE(p);
ERTS_GET_TRACER_REF(tracer_ref, p->tracer_proc, p->trace_flags);
hp = ERTS_ALLOC_SYSMSG_HEAP(sz_data, &bp, &off_heap, tracer_ref);
mess = TUPLE5(hp, am_trace, calling_pid, am_open, p->id, drv_name);
hp += 6;
erts_smp_mtx_lock(&smq_mtx);
if (p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
ERTS_ENQ_TRACE_MSG(p->id, tracer_ref, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
}
/* Sends trace message:
* {trace_ts, PortPid, What, Data, Timestamp}
* or {trace, PortPid, What, Data}
*
* 'what' must be atomic, 'data' must be atomic.
* 't_p' is the traced port.
*/
void
trace_port(Port *t_p, Eterm what, Eterm data) {
Eterm mess;
Eterm* hp;
if (is_internal_port(t_p->tracer_proc)) {
Eterm local_heap[5+5];
hp = local_heap;
mess = TUPLE4(hp, am_trace, t_p->id, what, data);
hp += 5;
erts_smp_mtx_lock(&smq_mtx);
if (t_p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
/* No fake schedule */
send_to_port(NULL, mess, &t_p->tracer_proc, &t_p->trace_flags);
erts_smp_mtx_unlock(&smq_mtx);
} else {
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
size_t sz_data;
ERTS_TRACER_REF_TYPE tracer_ref;
ASSERT(is_internal_pid(t_p->tracer_proc)
&& internal_pid_index(t_p->tracer_proc) < erts_max_processes);
sz_data = 5 + TS_SIZE(t_p);
ERTS_GET_TRACER_REF(tracer_ref, t_p->tracer_proc, t_p->trace_flags);
hp = ERTS_ALLOC_SYSMSG_HEAP(sz_data, &bp, &off_heap, tracer_ref);
mess = TUPLE4(hp, am_trace, t_p->id, what, data);
hp += 5;
erts_smp_mtx_lock(&smq_mtx);
if (t_p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
ERTS_ENQ_TRACE_MSG(t_p->id, tracer_ref, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
}
/* Send {trace_ts, Pid, What, {Mod, Func, Arity}, Timestamp}
* or {trace, Pid, What, {Mod, Func, Arity}}
*
* where 'What' is supposed to be 'in' or 'out' and
* where 'where' is supposed to be location (callback)
* for the port.
*/
void
trace_sched_ports(Port *p, Eterm what) {
trace_sched_ports_where(p,what, make_small(0));
}
void
trace_sched_ports_where(Port *p, Eterm what, Eterm where) {
Eterm mess;
Eterm* hp;
int ws = 5;
Eterm sched_id = am_undefined;
if (is_internal_port(p->tracer_proc)) {
Eterm local_heap[5+6];
hp = local_heap;
if (IS_TRACED_FL(p, F_TRACE_SCHED_NO)) {
#ifdef ERTS_SMP
ErtsSchedulerData *esd = erts_get_scheduler_data();
if (esd) sched_id = make_small(esd->no);
else sched_id = am_undefined;
#else
sched_id = make_small(1);
#endif
mess = TUPLE5(hp, am_trace, p->id, what, sched_id, where);
ws = 6;
} else {
mess = TUPLE4(hp, am_trace, p->id, what, where);
ws = 5;
}
hp += ws;
erts_smp_mtx_lock(&smq_mtx);
if (p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
/* No fake scheduling */
send_to_port(NULL, mess, &p->tracer_proc, &p->trace_flags);
erts_smp_mtx_unlock(&smq_mtx);
} else {
ErlHeapFragment *bp;
ErlOffHeap *off_heap;
ERTS_TRACER_REF_TYPE tracer_ref;
ASSERT(is_internal_pid(p->tracer_proc)
&& internal_pid_index(p->tracer_proc) < erts_max_processes);
if (IS_TRACED_FL(p, F_TRACE_SCHED_NO)) ws = 6; /* Make place for scheduler id */
ERTS_GET_TRACER_REF(tracer_ref, p->tracer_proc, p->trace_flags);
hp = ERTS_ALLOC_SYSMSG_HEAP(ws+TS_SIZE(p), &bp, &off_heap, tracer_ref);
if (IS_TRACED_FL(p, F_TRACE_SCHED_NO)) {
#ifdef ERTS_SMP
ErtsSchedulerData *esd = erts_get_scheduler_data();
if (esd) sched_id = make_small(esd->no);
else sched_id = am_undefined;
#else
sched_id = make_small(1);
#endif
mess = TUPLE5(hp, am_trace, p->id, what, sched_id, where);
} else {
mess = TUPLE4(hp, am_trace, p->id, what, where);
}
hp += ws;
erts_smp_mtx_lock(&smq_mtx);
if (p->trace_flags & F_TIMESTAMP) {
hp = patch_ts(mess, hp);
}
ERTS_ENQ_TRACE_MSG(p->id, tracer_ref, mess, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
}
/* Port profiling */
void
profile_runnable_port(Port *p, Eterm status) {
Uint Ms, s, us;
Eterm *hp, msg, timestamp;
Eterm count = make_small(0);
#ifndef ERTS_SMP
Eterm local_heap[4 + 6];
hp = local_heap;
#else
ErlHeapFragment *bp;
Uint hsz;
hsz = 4 + 6;
bp = new_message_buffer(hsz);
hp = bp->mem;
#endif
erts_smp_mtx_lock(&smq_mtx);
GET_NOW(&Ms, &s, &us);
timestamp = TUPLE3(hp, make_small(Ms), make_small(s), make_small(us)); hp += 4;
msg = TUPLE5(hp, am_profile, p->id, status, count, timestamp); hp += 6;
#ifndef ERTS_SMP
profile_send(msg);
#else
enqueue_sys_msg_unlocked(SYS_MSG_TYPE_SYSPROF, NIL, NIL, msg, bp);
#endif
erts_smp_mtx_unlock(&smq_mtx);
}
/* Process profiling */
void
profile_runnable_proc(Process *p, Eterm status){
Uint Ms, s, us;
Eterm *hp, msg, timestamp;
Eterm where = am_undefined;
#ifndef ERTS_SMP
Eterm local_heap[4 + 6 + 4];
hp = local_heap;
#else
ErlHeapFragment *bp;
Uint hsz = 4 + 6 + 4;
#endif
if (!p->current) {
p->current = find_function_from_pc(p->i);
}
#ifdef ERTS_SMP
if (!p->current) {
hsz = 4 + 6;
}
bp = new_message_buffer(hsz);
hp = bp->mem;
#endif
if (p->current) {
where = TUPLE3(hp, p->current[0], p->current[1], make_small(p->current[2])); hp += 4;
} else {
where = make_small(0);
}
erts_smp_mtx_lock(&smq_mtx);
GET_NOW(&Ms, &s, &us);
timestamp = TUPLE3(hp, make_small(Ms), make_small(s), make_small(us)); hp += 4;
msg = TUPLE5(hp, am_profile, p->id, status, where, timestamp); hp += 6;
#ifndef ERTS_SMP
profile_send(msg);
#else
enqueue_sys_msg_unlocked(SYS_MSG_TYPE_SYSPROF, NIL, NIL, msg, bp);
#endif
erts_smp_mtx_unlock(&smq_mtx);
}
/* End system_profile tracing */
#ifdef ERTS_SMP
void
erts_check_my_tracer_proc(Process *p)
{
if (is_internal_pid(p->tracer_proc)) {
Process *tracer = erts_pid2proc(p, ERTS_PROC_LOCK_MAIN,
p->tracer_proc, ERTS_PROC_LOCK_STATUS);
int invalid_tracer = !tracer || !(tracer->trace_flags & F_TRACER);
if (tracer)
erts_smp_proc_unlock(tracer, ERTS_PROC_LOCK_STATUS);
if (invalid_tracer) {
erts_smp_proc_lock(p, ERTS_PROC_LOCKS_ALL_MINOR);
p->trace_flags &= ~TRACEE_FLAGS;
p->tracer_proc = NIL;
erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL_MINOR);
}
}
}
typedef struct ErtsSysMsgQ_ ErtsSysMsgQ;
struct ErtsSysMsgQ_ {
ErtsSysMsgQ *next;
enum ErtsSysMsgType type;
Eterm from;
Eterm to;
Eterm msg;
ErlHeapFragment *bp;
};
static ErtsSysMsgQ *sys_message_queue;
static ErtsSysMsgQ *sys_message_queue_end;
static erts_tid_t sys_msg_dispatcher_tid;
static erts_cnd_t smq_cnd;
static int dispatcher_waiting;
ERTS_QUALLOC_IMPL(smq_element, ErtsSysMsgQ, 20, ERTS_ALC_T_SYS_MSG_Q)
static void
enqueue_sys_msg_unlocked(enum ErtsSysMsgType type,
Eterm from,
Eterm to,
Eterm msg,
ErlHeapFragment *bp)
{
ErtsSysMsgQ *smqp;
smqp = smq_element_alloc();
smqp->next = NULL;
smqp->type = type;
smqp->from = from;
smqp->to = to;
smqp->msg = msg;
smqp->bp = bp;
if (sys_message_queue_end) {
ASSERT(sys_message_queue);
sys_message_queue_end->next = smqp;
}
else {
ASSERT(!sys_message_queue);
sys_message_queue = smqp;
}
sys_message_queue_end = smqp;
erts_smp_cnd_signal(&smq_cnd);
}
static void
enqueue_sys_msg(enum ErtsSysMsgType type,
Eterm from,
Eterm to,
Eterm msg,
ErlHeapFragment *bp)
{
erts_smp_mtx_lock(&smq_mtx);
enqueue_sys_msg_unlocked(type, from, to, msg, bp);
erts_smp_mtx_unlock(&smq_mtx);
}
static void
prepare_for_block(void *unused)
{
erts_smp_mtx_unlock(&smq_mtx);
}
static void
resume_after_block(void *unused)
{
erts_smp_mtx_lock(&smq_mtx);
}
void
erts_queue_error_logger_message(Eterm from, Eterm msg, ErlHeapFragment *bp)
{
enqueue_sys_msg(SYS_MSG_TYPE_ERRLGR, from, am_error_logger, msg, bp);
}
void
erts_send_sys_msg_proc(Eterm from, Eterm to, Eterm msg, ErlHeapFragment *bp)
{
ASSERT(is_internal_pid(to));
enqueue_sys_msg(SYS_MSG_TYPE_PROC_MSG, from, to, msg, bp);
}
#ifdef DEBUG_PRINTOUTS
static void
print_msg_type(ErtsSysMsgQ *smqp)
{
switch (smqp->type) {
case SYS_MSG_TYPE_TRACE:
erts_fprintf(stderr, "TRACE ");
break;
case SYS_MSG_TYPE_SEQTRACE:
erts_fprintf(stderr, "SEQTRACE ");
break;
case SYS_MSG_TYPE_SYSMON:
erts_fprintf(stderr, "SYSMON ");
break;
case SYS_MSG_TYPE_SYSPROF:
erts_fprintf(stderr, "SYSPROF ");
break;
case SYS_MSG_TYPE_ERRLGR:
erts_fprintf(stderr, "ERRLGR ");
break;
case SYS_MSG_TYPE_PROC_MSG:
erts_fprintf(stderr, "PROC_MSG ");
break;
default:
erts_fprintf(stderr, "??? ");
break;
}
}
#endif
static void
sys_msg_disp_failure(ErtsSysMsgQ *smqp, Eterm receiver)
{
switch (smqp->type) {
case SYS_MSG_TYPE_TRACE:
/* Invalid tracer_proc's are removed when processes
are scheduled in. */
break;
case SYS_MSG_TYPE_SEQTRACE:
/* Reset seq_tracer if it hasn't changed */
erts_smp_mtx_lock(&sys_trace_mtx);
if (system_seq_tracer == receiver)
system_seq_tracer = am_false;
erts_smp_mtx_unlock(&sys_trace_mtx);
break;
case SYS_MSG_TYPE_SYSMON:
if (receiver == NIL
&& !erts_system_monitor_long_gc
&& !erts_system_monitor_large_heap
&& !erts_system_monitor_flags.busy_port
&& !erts_system_monitor_flags.busy_dist_port)
break; /* Everything is disabled */
erts_smp_block_system(ERTS_BS_FLG_ALLOW_GC);
if (system_monitor == receiver || receiver == NIL)
erts_system_monitor_clear(NULL);
erts_smp_release_system();
break;
case SYS_MSG_TYPE_SYSPROF:
if (receiver == NIL
&& !erts_system_profile_flags.runnable_procs
&& !erts_system_profile_flags.runnable_ports
&& !erts_system_profile_flags.exclusive
&& !erts_system_profile_flags.scheduler)
break;
/* Block system to clear flags */
erts_smp_block_system(0);
if (system_profile == receiver || receiver == NIL) {
erts_system_profile_clear(NULL);
}
erts_smp_release_system();
break;
case SYS_MSG_TYPE_ERRLGR: {
char *no_elgger = "(no error logger present)";
Eterm *tp;
Eterm tag;
if (is_not_tuple(smqp->msg)) {
unexpected_elmsg:
erts_fprintf(stderr,
"%s unexpected error logger message: %T\n",
no_elgger,
smqp->msg);
}
tp = tuple_val(smqp->msg);
if (arityval(tp[0]) != 2)
goto unexpected_elmsg;
if (is_not_tuple(tp[2]))
goto unexpected_elmsg;
tp = tuple_val(tp[2]);
if (arityval(tp[0]) != 3)
goto unexpected_elmsg;
tag = tp[1];
if (is_not_tuple(tp[3]))
goto unexpected_elmsg;
tp = tuple_val(tp[3]);
if (arityval(tp[0]) != 3)
goto unexpected_elmsg;
if (is_not_list(tp[3]))
goto unexpected_elmsg;
erts_fprintf(stderr, "%s %T: %T\n",
no_elgger, tag, CAR(list_val(tp[3])));
break;
}
case SYS_MSG_TYPE_PROC_MSG:
break;
default:
ASSERT(0);
}
}
static void *
sys_msg_dispatcher_func(void *unused)
{
ErtsSysMsgQ *local_sys_message_queue = NULL;
#ifdef ERTS_ENABLE_LOCK_CHECK
erts_lc_set_thread_name("system message dispatcher");
#endif
erts_register_blockable_thread();
erts_smp_activity_begin(ERTS_ACTIVITY_IO, NULL, NULL, NULL);
while (1) {
ErtsSysMsgQ *smqp;
ERTS_SMP_LC_ASSERT(!ERTS_LC_IS_BLOCKING);
erts_smp_mtx_lock(&smq_mtx);
/* Free previously used queue ... */
while (local_sys_message_queue) {
smqp = local_sys_message_queue;
local_sys_message_queue = smqp->next;
smq_element_free(smqp);
}
/* Fetch current trace message queue ... */
erts_smp_activity_change(ERTS_ACTIVITY_IO,
ERTS_ACTIVITY_WAIT,
prepare_for_block,
resume_after_block,
NULL);
dispatcher_waiting = 1;
while (!sys_message_queue)
erts_smp_cnd_wait(&smq_cnd, &smq_mtx);
dispatcher_waiting = 0;
erts_smp_activity_change(ERTS_ACTIVITY_WAIT,
ERTS_ACTIVITY_IO,
prepare_for_block,
resume_after_block,
NULL);
local_sys_message_queue = sys_message_queue;
sys_message_queue = NULL;
sys_message_queue_end = NULL;
erts_smp_mtx_unlock(&smq_mtx);
/* Send trace messages ... */
ASSERT(local_sys_message_queue);
for (smqp = local_sys_message_queue; smqp; smqp = smqp->next) {
Eterm receiver;
ErtsProcLocks proc_locks = ERTS_PROC_LOCKS_MSG_SEND;
Process *proc = NULL;
Port *port = NULL;
#ifdef DEBUG_PRINTOUTS
print_msg_type(smqp);
#endif
switch (smqp->type) {
case SYS_MSG_TYPE_TRACE:
case SYS_MSG_TYPE_PROC_MSG:
receiver = smqp->to;
break;
case SYS_MSG_TYPE_SEQTRACE:
receiver = erts_get_system_seq_tracer();
break;
case SYS_MSG_TYPE_SYSMON:
receiver = erts_get_system_monitor();
if (smqp->from == receiver) {
#ifdef DEBUG_PRINTOUTS
erts_fprintf(stderr, "MSG=%T to %T... ",
smqp->msg, receiver);
#endif
goto drop_sys_msg;
}
break;
case SYS_MSG_TYPE_SYSPROF:
receiver = erts_get_system_profile();
if (smqp->from == receiver) {
#ifdef DEBUG_PRINTOUTS
erts_fprintf(stderr, "MSG=%T to %T... ",
smqp->msg, receiver);
#endif
goto drop_sys_msg;
}
break;
case SYS_MSG_TYPE_ERRLGR:
receiver = am_error_logger;
break;
default:
receiver = NIL;
break;
}
#ifdef DEBUG_PRINTOUTS
erts_fprintf(stderr, "MSG=%T to %T... ", smqp->msg, receiver);
#endif
if (is_internal_pid(receiver)) {
proc = erts_pid2proc(NULL, 0, receiver, proc_locks);
if (!proc
|| (smqp->type == SYS_MSG_TYPE_TRACE
&& !(proc->trace_flags & F_TRACER))) {
/* Bad tracer */
#ifdef DEBUG_PRINTOUTS
if (smqp->type == SYS_MSG_TYPE_TRACE && proc)
erts_fprintf(stderr,
"<tracer alive but missing "
"F_TRACER flag> ");
#endif
goto failure;
}
else {
queue_proc_msg:
erts_queue_message(proc,&proc_locks,smqp->bp,smqp->msg,NIL);
#ifdef DEBUG_PRINTOUTS
erts_fprintf(stderr, "delivered\n");
#endif
erts_smp_proc_unlock(proc, proc_locks);
}
}
else if (receiver == am_error_logger) {
proc = erts_whereis_process(NULL,0,receiver,proc_locks,0);
if (!proc)
goto failure;
else if (smqp->from == proc->id)
goto drop_sys_msg;
else
goto queue_proc_msg;
}
else if (is_internal_port(receiver)) {
port = erts_id2port(receiver, NULL, 0);
if (INVALID_TRACER_PORT(port, receiver)) {
if (port)
erts_port_release(port);
goto failure;
}
else {
write_sys_msg_to_port(receiver,
port,
smqp->from,
smqp->type,
smqp->msg);
if (port->control_flags & PORT_CONTROL_FLAG_HEAVY)
port->control_flags &= ~PORT_CONTROL_FLAG_HEAVY;
#ifdef DEBUG_PRINTOUTS
erts_fprintf(stderr, "delivered\n");
#endif
erts_port_release(port);
if (smqp->bp)
free_message_buffer(smqp->bp);
}
}
else {
failure:
sys_msg_disp_failure(smqp, receiver);
drop_sys_msg:
if (proc)
erts_smp_proc_unlock(proc, proc_locks);
if (smqp->bp)
free_message_buffer(smqp->bp);
#ifdef DEBUG_PRINTOUTS
erts_fprintf(stderr, "dropped\n");
#endif
}
}
}
erts_smp_activity_end(ERTS_ACTIVITY_IO, NULL, NULL, NULL);
return NULL;
}
void
erts_foreach_sys_msg_in_q(void (*func)(Eterm,
Eterm,
Eterm,
ErlHeapFragment *))
{
ErtsSysMsgQ *sm;
erts_smp_mtx_lock(&smq_mtx);
for (sm = sys_message_queue; sm; sm = sm->next) {
Eterm to;
switch (sm->type) {
case SYS_MSG_TYPE_TRACE:
to = sm->to;
break;
case SYS_MSG_TYPE_SEQTRACE:
to = erts_get_system_seq_tracer();
break;
case SYS_MSG_TYPE_SYSMON:
to = erts_get_system_monitor();
break;
case SYS_MSG_TYPE_SYSPROF:
to = erts_get_system_profile();
break;
case SYS_MSG_TYPE_ERRLGR:
to = am_error_logger;
break;
default:
to = NIL;
break;
}
(*func)(sm->from, to, sm->msg, sm->bp);
}
erts_smp_mtx_unlock(&smq_mtx);
}
static void
init_sys_msg_dispatcher(void)
{
erts_smp_thr_opts_t thr_opts = ERTS_SMP_THR_OPTS_DEFAULT_INITER;
thr_opts.detached = 1;
init_smq_element_alloc();
sys_message_queue = NULL;
sys_message_queue_end = NULL;
erts_smp_cnd_init(&smq_cnd);
erts_smp_mtx_init(&smq_mtx, "sys_msg_q");
dispatcher_waiting = 0;
erts_smp_thr_create(&sys_msg_dispatcher_tid,
sys_msg_dispatcher_func,
NULL,
&thr_opts);
}
#endif
