/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2001-2018. 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 "global.h"
#include "erl_node_tables.h"
#include "dist.h"
#include "big.h"
#include "error.h"
#include "erl_thr_progress.h"
#include "dtrace-wrapper.h"
#include "erl_binary.h"
#include "erl_bif_unique.h"
#include "erl_proc_sig_queue.h"
Hash erts_dist_table;
Hash erts_node_table;
erts_rwmtx_t erts_dist_table_rwmtx;
erts_rwmtx_t erts_node_table_rwmtx;
DistEntry *erts_hidden_dist_entries;
DistEntry *erts_visible_dist_entries;
DistEntry *erts_pending_dist_entries;
DistEntry *erts_not_connected_dist_entries; /* including erts_this_dist_entry */
Sint erts_no_of_hidden_dist_entries;
Sint erts_no_of_visible_dist_entries;
Sint erts_no_of_pending_dist_entries;
Sint erts_no_of_not_connected_dist_entries; /* including erts_this_dist_entry */
DistEntry *erts_this_dist_entry;
ErlNode *erts_this_node;
char erts_this_node_sysname_BUFFER[256],
*erts_this_node_sysname = "uninitialized yet";
static Uint node_entries = 0;
static Uint dist_entries = 0;
static int references_atoms_need_init = 1;
static ErtsMonotonicTime orig_node_tab_delete_delay;
static ErtsMonotonicTime node_tab_delete_delay;
static void report_gc_active_dist_entry(Eterm sysname, enum dist_entry_state);
/* -- The distribution table ---------------------------------------------- */
#define ErtsBin2DistEntry(B) \
((DistEntry *) ERTS_MAGIC_BIN_DATA((B)))
#define ErtsDistEntry2Bin(DEP) \
((Binary *) ERTS_MAGIC_BIN_FROM_DATA((DEP)))
static ERTS_INLINE erts_aint_t
de_refc_read(DistEntry *dep, erts_aint_t min)
{
return erts_refc_read(&ErtsDistEntry2Bin(dep)->intern.refc, min);
}
static ERTS_INLINE erts_aint_t
de_refc_inc_read(DistEntry *dep, erts_aint_t min)
{
return erts_refc_inctest(&ErtsDistEntry2Bin(dep)->intern.refc, min);
}
static ERTS_INLINE void
de_refc_inc(DistEntry *dep, erts_aint_t min)
{
erts_refc_inc(&ErtsDistEntry2Bin(dep)->intern.refc, min);
}
static ERTS_INLINE void
de_refc_dec(DistEntry *dep, erts_aint_t min)
{
#ifdef DEBUG
(void) erts_refc_read(&ErtsDistEntry2Bin(dep)->intern.refc, min+1);
#endif
erts_bin_release(ErtsDistEntry2Bin(dep));
}
static ERTS_INLINE erts_aint_t
de_refc_dec_read(DistEntry *dep, erts_aint_t min)
{
return erts_refc_dectest(&ErtsDistEntry2Bin(dep)->intern.refc, min);
}
void
erts_ref_dist_entry(DistEntry *dep)
{
ASSERT(dep);
if (de_refc_inc_read(dep, 1) == 1) {
de_refc_inc(dep, 2); /* Pending delete */
}
}
void
erts_deref_dist_entry(DistEntry *dep)
{
ASSERT(dep);
de_refc_dec(dep, 0);
}
#ifdef DEBUG
static int
is_in_de_list(DistEntry *dep, DistEntry *dep_list)
{
DistEntry *tdep;
for(tdep = dep_list; tdep; tdep = tdep->next)
if(tdep == dep)
return 1;
return 0;
}
#endif
static HashValue
dist_table_hash(void *dep)
{
return atom_tab(atom_val(((DistEntry *) dep)->sysname))->slot.bucket.hvalue;
}
static int
dist_table_cmp(void *dep1, void *dep2)
{
return (((DistEntry *) dep1)->sysname == ((DistEntry *) dep2)->sysname
? 0 : 1);
}
static void*
dist_table_alloc(void *dep_tmpl)
{
erts_aint_t refc;
Eterm sysname;
Binary *bin;
DistEntry *dep;
erts_rwmtx_opt_t rwmtx_opt = ERTS_RWMTX_OPT_DEFAULT_INITER;
rwmtx_opt.type = ERTS_RWMTX_TYPE_FREQUENT_READ;
sysname = ((DistEntry *) dep_tmpl)->sysname;
bin = erts_create_magic_binary_x(sizeof(DistEntry),
erts_dist_entry_destructor,
ERTS_ALC_T_DIST_ENTRY,
0);
dep = ErtsBin2DistEntry(bin);
dist_entries++;
refc = de_refc_dec_read(dep, -1);
ASSERT(refc == -1); (void)refc;
dep->prev = NULL;
erts_rwmtx_init_opt(&dep->rwmtx, &rwmtx_opt, "dist_entry", sysname,
ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION);
dep->sysname = sysname;
dep->cid = NIL;
erts_atomic_init_nob(&dep->input_handler, (erts_aint_t) NIL);
dep->connection_id = 0;
dep->state = ERTS_DE_STATE_IDLE;
dep->flags = 0;
dep->version = 0;
dep->mld = NULL;
erts_mtx_init(&dep->qlock, "dist_entry_out_queue", sysname,
ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION);
erts_atomic32_init_nob(&dep->qflgs, 0);
erts_atomic_init_nob(&dep->qsize, 0);
erts_atomic64_init_nob(&dep->in, 0);
erts_atomic64_init_nob(&dep->out, 0);
dep->out_queue.first = NULL;
dep->out_queue.last = NULL;
dep->suspended = NULL;
dep->tmp_out_queue.first = NULL;
dep->tmp_out_queue.last = NULL;
dep->finalized_out_queue.first = NULL;
dep->finalized_out_queue.last = NULL;
erts_atomic_init_nob(&dep->dist_cmd_scheduled, 0);
erts_port_task_handle_init(&dep->dist_cmd);
dep->send = NULL;
dep->cache = NULL;
dep->transcode_ctx = NULL;
dep->sequences = NULL;
/* Link in */
/* All new dist entries are "not connected".
* erts_this_dist_entry is also always included among "not connected"
*/
dep->next = erts_not_connected_dist_entries;
if(erts_not_connected_dist_entries) {
ASSERT(erts_not_connected_dist_entries->prev == NULL);
erts_not_connected_dist_entries->prev = dep;
}
erts_not_connected_dist_entries = dep;
erts_no_of_not_connected_dist_entries++;
return (void *) dep;
}
static void
dist_table_free(void *vdep)
{
DistEntry *dep = (DistEntry *) vdep;
ASSERT(de_refc_read(dep, -1) == -1);
ASSERT(dep->state == ERTS_DE_STATE_IDLE);
ASSERT(is_nil(dep->cid));
ASSERT(dep->mld == NULL);
/* Link out */
/* All dist entries about to be removed are "not connected" */
if(dep->prev) {
ASSERT(is_in_de_list(dep, erts_not_connected_dist_entries));
dep->prev->next = dep->next;
}
else {
ASSERT(erts_not_connected_dist_entries == dep);
erts_not_connected_dist_entries = dep->next;
}
if(dep->next)
dep->next->prev = dep->prev;
ASSERT(erts_no_of_not_connected_dist_entries > 0);
erts_no_of_not_connected_dist_entries--;
ASSERT(!dep->cache);
erts_rwmtx_destroy(&dep->rwmtx);
erts_mtx_destroy(&dep->qlock);
#ifdef DEBUG
sys_memset(vdep, 0x77, sizeof(DistEntry));
#endif
erts_bin_free(ErtsDistEntry2Bin(dep));
ASSERT(dist_entries > 0);
dist_entries--;
}
void
erts_dist_table_info(fmtfn_t to, void *to_arg)
{
int lock = !ERTS_IS_CRASH_DUMPING;
if (lock)
erts_rwmtx_rlock(&erts_dist_table_rwmtx);
hash_info(to, to_arg, &erts_dist_table);
if (lock)
erts_rwmtx_runlock(&erts_dist_table_rwmtx);
}
static ERTS_INLINE DistEntry *find_dist_entry(Eterm sysname,
int inc_refc,
int connected_only)
{
DistEntry *res;
DistEntry de;
de.sysname = sysname;
erts_rwmtx_rlock(&erts_dist_table_rwmtx);
res = hash_get(&erts_dist_table, (void *) &de);
if (res) {
if (connected_only && is_nil(res->cid))
res = NULL;
else {
int pend_delete;
erts_aint_t refc;
if (inc_refc) {
refc = de_refc_inc_read(res, 1);
pend_delete = refc < 2;
}
else {
refc = de_refc_read(res, 0);
pend_delete = refc < 1;
}
if (pend_delete) /* Pending delete */
de_refc_inc(res, 1);
}
}
erts_rwmtx_runlock(&erts_dist_table_rwmtx);
return res;
}
DistEntry *
erts_channel_no_to_dist_entry(Uint cno)
{
/*
* Does NOT increase reference count!
*/
/*
* For this node (and previous incarnations of this node),
* ERST_INTERNAL_CHANNEL_NO (will always be 0 I guess) is used as
* channel no. For other nodes, the atom index of the atom corresponding
* to the node name is used as channel no.
*/
if (cno == ERST_INTERNAL_CHANNEL_NO)
return erts_this_dist_entry;
if((cno > MAX_ATOM_INDEX)
|| (cno >= atom_table_size())
|| (atom_tab(cno) == NULL))
return NULL;
/* cno is a valid atom index; find corresponding dist entry (if there
is one) */
return find_dist_entry(make_atom(cno), 0, 0);
}
DistEntry *
erts_sysname_to_connected_dist_entry(Eterm sysname)
{
/*
* Does NOT increase reference count!
*/
if(erts_this_dist_entry->sysname == sysname)
return erts_this_dist_entry;
return find_dist_entry(sysname, 0, 1);
}
DistEntry *erts_find_or_insert_dist_entry(Eterm sysname)
{
/*
* This function DOES increase reference count!
*/
DistEntry *res;
DistEntry de;
erts_aint_t refc;
res = find_dist_entry(sysname, 1, 0);
if (res)
return res;
de.sysname = sysname;
erts_rwmtx_rwlock(&erts_dist_table_rwmtx);
res = hash_put(&erts_dist_table, (void *) &de);
refc = de_refc_inc_read(res, 0);
if (refc < 2) /* New or pending delete */
de_refc_inc(res, 1);
erts_rwmtx_rwunlock(&erts_dist_table_rwmtx);
return res;
}
DistEntry *erts_find_dist_entry(Eterm sysname)
{
/*
* Does NOT increase reference count!
*/
return find_dist_entry(sysname, 0, 0);
}
DistEntry *
erts_dhandle_to_dist_entry(Eterm dhandle, Uint32 *conn_id)
{
Eterm *tpl;
Binary *bin;
if (!is_boxed(dhandle))
return NULL;
tpl = boxed_val(dhandle);
if (tpl[0] != make_arityval(2) || !is_small(tpl[1])
|| !is_internal_magic_ref(tpl[2]))
return NULL;
*conn_id = unsigned_val(tpl[1]);
bin = erts_magic_ref2bin(tpl[2]);
if (ERTS_MAGIC_BIN_DESTRUCTOR(bin) != erts_dist_entry_destructor)
return NULL;
return ErtsBin2DistEntry(bin);
}
Eterm
erts_build_dhandle(Eterm **hpp, ErlOffHeap* ohp,
DistEntry *dep, Uint32 conn_id)
{
Binary *bin = ErtsDistEntry2Bin(dep);
Eterm mref, dhandle;
ASSERT(bin);
ASSERT(ERTS_MAGIC_BIN_DESTRUCTOR(bin) == erts_dist_entry_destructor);
mref = erts_mk_magic_ref(hpp, ohp, bin);
dhandle = TUPLE2(*hpp, make_small(conn_id), mref);
*hpp += 3;
return dhandle;
}
Eterm
erts_make_dhandle(Process *c_p, DistEntry *dep, Uint32 conn_id)
{
Eterm *hp = HAlloc(c_p, ERTS_DHANDLE_SIZE);
return erts_build_dhandle(&hp, &c_p->off_heap, dep, conn_id);
}
static void start_timer_delete_dist_entry(void *vdep);
static void prepare_try_delete_dist_entry(void *vdep);
static void try_delete_dist_entry(DistEntry*);
static void schedule_delete_dist_entry(DistEntry* dep)
{
/*
* Here we need thread progress to wait for other threads, that may have
* done lookup without refc++, to do either refc++ or drop their refs.
*
* Note that timeouts do not guarantee thread progress.
*/
ErtsSchedulerData *esdp = erts_get_scheduler_data();
if (esdp && !ERTS_SCHEDULER_IS_DIRTY(esdp)) {
erts_schedule_thr_prgr_later_op(start_timer_delete_dist_entry,
dep, &dep->later_op);
} else {
/*
* Since OTP 20, it's possible that destructor is executed on
* a dirty scheduler. Aux work cannot be done on a dirty
* scheduler, and scheduling any aux work on a dirty scheduler
* makes the scheduler to loop infinitely.
* To avoid this, make a spot jump: schedule this function again
* on a first normal scheduler. It is guaranteed to be always
* online. Since it's a rare event, this shall not pose a big
* utilisation hit.
*/
erts_schedule_misc_aux_work(1,
(void (*)(void *))schedule_delete_dist_entry,
(void *) dep);
}
}
static void
start_timer_delete_dist_entry(void *vdep)
{
if (node_tab_delete_delay == 0) {
prepare_try_delete_dist_entry(vdep);
}
else {
ASSERT(node_tab_delete_delay > 0);
erts_start_timer_callback(node_tab_delete_delay,
prepare_try_delete_dist_entry,
vdep);
}
}
static void
prepare_try_delete_dist_entry(void *vdep)
{
DistEntry *dep = vdep;
erts_aint_t refc;
/*
* Time has passed since we decremented refc to zero and DistEntry may
* have been revived. Do a fast check without table lock first.
*/
refc = de_refc_read(dep, 0);
if (refc == 0) {
try_delete_dist_entry(dep);
}
else {
/*
* Someone has done lookup and done refc++ for us.
*/
refc = de_refc_dec_read(dep, 0);
if (refc == 0)
schedule_delete_dist_entry(dep);
}
}
static void try_delete_dist_entry(DistEntry* dep)
{
erts_aint_t refc;
erts_de_rwlock(dep);
if (dep->state != ERTS_DE_STATE_IDLE && de_refc_read(dep,0) == 0) {
Eterm sysname = dep->sysname;
enum dist_entry_state state = dep->state;
if (dep->state != ERTS_DE_STATE_PENDING)
ERTS_INTERNAL_ERROR("Garbage collecting connected distribution entry");
erts_abort_connection_rwunlock(dep);
report_gc_active_dist_entry(sysname, state);
}
else
erts_de_rwunlock(dep);
erts_rwmtx_rwlock(&erts_dist_table_rwmtx);
/*
* Another thread might have looked up this dist entry after
* we decided to delete it (refc became zero). If so, the other
* thread incremented refc one extra step for this thread.
*
* If refc reach -1, no one has done lookup and no one can do lookup
* as we have table lock. Delete the entry.
*
* If refc reach 0, someone raced us and either
* (1) did lookup with own refc++ and already released it again
* (2) did lookup without own refc++
* Schedule new delete operation.
*
* If refc > 0, the entry is in use. Keep the entry.
*/
refc = de_refc_dec_read(dep, -1);
if (refc == -1)
(void) hash_erase(&erts_dist_table, (void *) dep);
erts_rwmtx_rwunlock(&erts_dist_table_rwmtx);
if (refc == 0) {
schedule_delete_dist_entry(dep);
}
}
static void report_gc_active_dist_entry(Eterm sysname,
enum dist_entry_state state)
{
char *state_str;
erts_dsprintf_buf_t *dsbuf = erts_create_logger_dsbuf();
switch (state) {
case ERTS_DE_STATE_CONNECTED:
state_str = "connected";
break;
case ERTS_DE_STATE_PENDING:
state_str = "pending connect";
break;
case ERTS_DE_STATE_EXITING:
state_str = "exiting";
break;
case ERTS_DE_STATE_IDLE:
state_str = "idle";
break;
default:
state_str = "unknown";
break;
}
erts_dsprintf(dsbuf, "Garbage collecting distribution "
"entry for node %T in state: %s",
sysname, state_str);
erts_send_error_to_logger_nogl(dsbuf);
}
int erts_dist_entry_destructor(Binary *bin)
{
DistEntry *dep = ErtsBin2DistEntry(bin);
erts_aint_t refc;
refc = de_refc_read(dep, -1);
if (refc == -1)
return 1; /* Allow deallocation of structure... */
schedule_delete_dist_entry(dep);
return 0;
}
Uint
erts_dist_table_size(void)
{
Uint res;
#ifdef DEBUG
HashInfo hi;
DistEntry *dep;
int i;
#endif
int lock = !ERTS_IS_CRASH_DUMPING;
if (lock)
erts_rwmtx_rlock(&erts_dist_table_rwmtx);
#ifdef DEBUG
hash_get_info(&hi, &erts_dist_table);
ASSERT(dist_entries == hi.objs);
i = 0;
for(dep = erts_visible_dist_entries; dep; dep = dep->next)
i++;
ASSERT(i == erts_no_of_visible_dist_entries);
i = 0;
for(dep = erts_hidden_dist_entries; dep; dep = dep->next)
i++;
ASSERT(i == erts_no_of_hidden_dist_entries);
i = 0;
for(dep = erts_pending_dist_entries; dep; dep = dep->next)
i++;
ASSERT(i == erts_no_of_pending_dist_entries);
i = 0;
for(dep = erts_not_connected_dist_entries; dep; dep = dep->next)
i++;
ASSERT(i == erts_no_of_not_connected_dist_entries);
ASSERT(dist_entries == (erts_no_of_visible_dist_entries
+ erts_no_of_hidden_dist_entries
+ erts_no_of_pending_dist_entries
+ erts_no_of_not_connected_dist_entries));
#endif
res = (hash_table_sz(&erts_dist_table)
+ dist_entries*sizeof(DistEntry)
+ erts_dist_cache_size());
if (lock)
erts_rwmtx_runlock(&erts_dist_table_rwmtx);
return res;
}
void
erts_set_dist_entry_not_connected(DistEntry *dep)
{
DistEntry** head;
ERTS_LC_ASSERT(erts_lc_is_de_rwlocked(dep));
erts_rwmtx_rwlock(&erts_dist_table_rwmtx);
ASSERT(dep != erts_this_dist_entry);
if (dep->state == ERTS_DE_STATE_PENDING) {
ASSERT(is_nil(dep->cid));
ASSERT(erts_no_of_pending_dist_entries > 0);
erts_no_of_pending_dist_entries--;
head = &erts_pending_dist_entries;
}
else {
ASSERT(dep->state != ERTS_DE_STATE_IDLE);
ASSERT(is_internal_port(dep->cid) || is_internal_pid(dep->cid));
if (dep->flags & DFLAG_PUBLISHED) {
ASSERT(erts_no_of_visible_dist_entries > 0);
erts_no_of_visible_dist_entries--;
head = &erts_visible_dist_entries;
}
else {
ASSERT(erts_no_of_hidden_dist_entries > 0);
erts_no_of_hidden_dist_entries--;
head = &erts_hidden_dist_entries;
}
}
if(dep->prev) {
ASSERT(is_in_de_list(dep, *head));
dep->prev->next = dep->next;
}
else {
ASSERT(*head == dep);
*head = dep->next;
}
if(dep->next)
dep->next->prev = dep->prev;
dep->state = ERTS_DE_STATE_IDLE;
dep->flags = 0;
dep->prev = NULL;
dep->cid = NIL;
dep->next = erts_not_connected_dist_entries;
if(erts_not_connected_dist_entries) {
ASSERT(erts_not_connected_dist_entries->prev == NULL);
erts_not_connected_dist_entries->prev = dep;
}
erts_not_connected_dist_entries = dep;
erts_no_of_not_connected_dist_entries++;
erts_rwmtx_rwunlock(&erts_dist_table_rwmtx);
}
void
erts_set_dist_entry_pending(DistEntry *dep)
{
ErtsMonLnkDist *mld = erts_mon_link_dist_create(dep->sysname);
ERTS_LC_ASSERT(erts_lc_is_de_rwlocked(dep));
erts_rwmtx_rwlock(&erts_dist_table_rwmtx);
ASSERT(dep != erts_this_dist_entry);
ASSERT(dep->state == ERTS_DE_STATE_IDLE);
ASSERT(is_nil(dep->cid));
if(dep->prev) {
ASSERT(is_in_de_list(dep, erts_not_connected_dist_entries));
dep->prev->next = dep->next;
}
else {
ASSERT(dep == erts_not_connected_dist_entries);
erts_not_connected_dist_entries = dep->next;
}
if(dep->next)
dep->next->prev = dep->prev;
erts_no_of_not_connected_dist_entries--;
dep->state = ERTS_DE_STATE_PENDING;
dep->flags = (DFLAG_DIST_MANDATORY | DFLAG_DIST_HOPEFULLY | DFLAG_NO_MAGIC);
dep->connection_id = (dep->connection_id + 1) & ERTS_DIST_CON_ID_MASK;
ASSERT(!dep->mld);
mld->connection_id = dep->connection_id;
dep->mld = mld;
dep->prev = NULL;
dep->next = erts_pending_dist_entries;
if(erts_pending_dist_entries) {
ASSERT(erts_pending_dist_entries->prev == NULL);
erts_pending_dist_entries->prev = dep;
}
erts_pending_dist_entries = dep;
erts_no_of_pending_dist_entries++;
erts_rwmtx_rwunlock(&erts_dist_table_rwmtx);
}
void
erts_set_dist_entry_connected(DistEntry *dep, Eterm cid, Uint flags)
{
erts_aint32_t set_qflgs;
ASSERT(dep->mld);
ERTS_LC_ASSERT(erts_lc_is_de_rwlocked(dep));
erts_rwmtx_rwlock(&erts_dist_table_rwmtx);
ASSERT(dep != erts_this_dist_entry);
ASSERT(is_nil(dep->cid));
ASSERT(dep->state == ERTS_DE_STATE_PENDING);
ASSERT(is_internal_port(cid) || is_internal_pid(cid));
if(dep->prev) {
ASSERT(is_in_de_list(dep, erts_pending_dist_entries));
dep->prev->next = dep->next;
}
else {
ASSERT(erts_pending_dist_entries == dep);
erts_pending_dist_entries = dep->next;
}
if(dep->next)
dep->next->prev = dep->prev;
ASSERT(erts_no_of_pending_dist_entries > 0);
erts_no_of_pending_dist_entries--;
dep->state = ERTS_DE_STATE_CONNECTED;
dep->flags = flags & ~DFLAG_NO_MAGIC;
dep->cid = cid;
erts_atomic_set_nob(&dep->input_handler,
(erts_aint_t) cid);
dep->prev = NULL;
erts_atomic64_set_nob(&dep->in, 0);
erts_atomic64_set_nob(&dep->out, 0);
set_qflgs = (is_internal_port(cid) ?
ERTS_DE_QFLG_PORT_CTRL : ERTS_DE_QFLG_PROC_CTRL);
erts_atomic32_read_bor_nob(&dep->qflgs, set_qflgs);
if(flags & DFLAG_PUBLISHED) {
dep->next = erts_visible_dist_entries;
if(erts_visible_dist_entries) {
ASSERT(erts_visible_dist_entries->prev == NULL);
erts_visible_dist_entries->prev = dep;
}
erts_visible_dist_entries = dep;
erts_no_of_visible_dist_entries++;
}
else {
dep->next = erts_hidden_dist_entries;
if(erts_hidden_dist_entries) {
ASSERT(erts_hidden_dist_entries->prev == NULL);
erts_hidden_dist_entries->prev = dep;
}
erts_hidden_dist_entries = dep;
erts_no_of_hidden_dist_entries++;
}
erts_rwmtx_rwunlock(&erts_dist_table_rwmtx);
}
/* -- Node table --------------------------------------------------------- */
/* Some large primes */
#define PRIME0 ((HashValue) 268438039)
#define PRIME1 ((HashValue) 268440479)
#define PRIME2 ((HashValue) 268439161)
#define PRIME3 ((HashValue) 268437017)
static HashValue
node_table_hash(void *venp)
{
Uint32 cre = ((ErlNode *) venp)->creation;
HashValue h = atom_tab(atom_val(((ErlNode *) venp)->sysname))->slot.bucket.hvalue;
return (h + cre) * PRIME0;
}
static int
node_table_cmp(void *venp1, void *venp2)
{
return ((((ErlNode *) venp1)->sysname == ((ErlNode *) venp2)->sysname) &&
((((ErlNode *) venp1)->creation == ((ErlNode *) venp2)->creation) ||
(((ErlNode *) venp1)->creation == 0 || ((ErlNode *) venp2)->creation == 0))
? 0
: 1);
}
static void*
node_table_alloc(void *venp_tmpl)
{
ErlNode *enp;
enp = (ErlNode *) erts_alloc(ERTS_ALC_T_NODE_ENTRY, sizeof(ErlNode));
node_entries++;
erts_init_node_entry(enp, -1);
enp->creation = ((ErlNode *) venp_tmpl)->creation;
enp->sysname = ((ErlNode *) venp_tmpl)->sysname;
enp->dist_entry = erts_find_or_insert_dist_entry(((ErlNode *) venp_tmpl)->sysname);
#ifdef ERL_NODE_BOOKKEEP
erts_atomic_init_nob(&enp->slot, 0);
sys_memzero(enp->books, sizeof(struct erl_node_bookkeeping) * 1024);
#endif
return (void *) enp;
}
static void
node_table_free(void *venp)
{
ErlNode *enp = (ErlNode *) venp;
ERTS_LC_ASSERT(enp != erts_this_node || erts_thr_progress_is_blocking());
erts_deref_dist_entry(enp->dist_entry);
#ifdef DEBUG
sys_memset(venp, 0x55, sizeof(ErlNode));
#endif
erts_free(ERTS_ALC_T_NODE_ENTRY, venp);
ASSERT(node_entries > 0);
node_entries--;
}
Uint
erts_node_table_size(void)
{
Uint res;
#ifdef DEBUG
HashInfo hi;
#endif
int lock = !ERTS_IS_CRASH_DUMPING;
if (lock)
erts_rwmtx_rlock(&erts_node_table_rwmtx);
#ifdef DEBUG
hash_get_info(&hi, &erts_node_table);
ASSERT(node_entries == hi.objs);
#endif
res = hash_table_sz(&erts_node_table) + node_entries*sizeof(ErlNode);
if (lock)
erts_rwmtx_runlock(&erts_node_table_rwmtx);
return res;
}
void
erts_node_table_info(fmtfn_t to, void *to_arg)
{
int lock = !ERTS_IS_CRASH_DUMPING;
if (lock)
erts_rwmtx_rlock(&erts_node_table_rwmtx);
hash_info(to, to_arg, &erts_node_table);
if (lock)
erts_rwmtx_runlock(&erts_node_table_rwmtx);
}
ErlNode *erts_find_or_insert_node(Eterm sysname, Uint32 creation, Eterm book)
{
ErlNode *res;
ErlNode ne;
ne.sysname = sysname;
ne.creation = creation;
erts_rwmtx_rlock(&erts_node_table_rwmtx);
res = hash_get(&erts_node_table, (void *) &ne);
if (res && res != erts_this_node) {
erts_aint_t refc = erts_ref_node_entry(res, 0, book);
if (refc < 2) /* New or pending delete */
erts_ref_node_entry(res, 1, THE_NON_VALUE);
}
erts_rwmtx_runlock(&erts_node_table_rwmtx);
if (res)
return res;
erts_rwmtx_rwlock(&erts_node_table_rwmtx);
res = hash_put(&erts_node_table, (void *) &ne);
ASSERT(res);
if (res != erts_this_node) {
erts_aint_t refc = erts_ref_node_entry(res, 0, book);
if (refc < 2) /* New or pending delete */
erts_ref_node_entry(res, 1, THE_NON_VALUE);
}
erts_rwmtx_rwunlock(&erts_node_table_rwmtx);
return res;
}
static void try_delete_node(void *venp)
{
ErlNode *enp = (ErlNode *) venp;
erts_aint_t refc;
erts_rwmtx_rwlock(&erts_node_table_rwmtx);
/*
* Another thread might have looked up this node after we
* decided to delete it (refc became zero). If so, the other
* thread incremented refc twice. Once for the new reference
* and once for this thread.
*
* If refc reach -1, no one has used the entry since we
* set up the timer. Delete the entry.
*
* If refc reach 0, the entry is currently not in use
* but has been used since we set up the timer. Set up a
* new timer.
*
* If refc > 0, the entry is in use. Keep the entry.
*/
erts_node_bookkeep(enp, THE_NON_VALUE, ERL_NODE_DEC);
refc = erts_refc_dectest(&enp->refc, -1);
if (refc == -1)
(void) hash_erase(&erts_node_table, (void *) enp);
erts_rwmtx_rwunlock(&erts_node_table_rwmtx);
if (refc == 0)
erts_schedule_delete_node(enp);
}
void erts_schedule_delete_node(ErlNode *enp)
{
ASSERT(enp != erts_this_node);
if (enp != erts_this_node) {
if (node_tab_delete_delay == 0)
try_delete_node((void *) enp);
else if (node_tab_delete_delay > 0)
erts_start_timer_callback(node_tab_delete_delay,
try_delete_node,
(void *) enp);
}
}
struct pn_data {
fmtfn_t to;
void *to_arg;
Eterm sysname;
int no_sysname;
int no_total;
};
static void print_node(void *venp, void *vpndp)
{
struct pn_data *pndp = ((struct pn_data *) vpndp);
ErlNode *enp = ((ErlNode *) venp);
if(pndp->sysname == NIL
|| enp->sysname == pndp->sysname) {
if (pndp->no_sysname == 0) {
erts_print(pndp->to, pndp->to_arg, "Creation:");
}
if(pndp->sysname == NIL) {
erts_print(pndp->to, pndp->to_arg, "Name: %T ", enp->sysname);
}
erts_print(pndp->to, pndp->to_arg, " %u", enp->creation);
#ifdef DEBUG
erts_print(pndp->to, pndp->to_arg, " (refc=%ld)",
erts_refc_read(&enp->refc, 0));
#endif
pndp->no_sysname++;
}
pndp->no_total++;
}
void erts_print_node_info(fmtfn_t to,
void *to_arg,
Eterm sysname,
int *no_sysname,
int *no_total)
{
int lock = !ERTS_IS_CRASH_DUMPING;
struct pn_data pnd;
pnd.to = to;
pnd.to_arg = to_arg;
pnd.sysname = sysname;
pnd.no_sysname = 0;
pnd.no_total = 0;
if (lock)
erts_rwmtx_rlock(&erts_node_table_rwmtx);
hash_foreach(&erts_node_table, print_node, (void *) &pnd);
if (pnd.no_sysname != 0) {
erts_print(to, to_arg, "\n");
}
if (lock)
erts_rwmtx_runlock(&erts_node_table_rwmtx);
if(no_sysname)
*no_sysname = pnd.no_sysname;
if(no_total)
*no_total = pnd.no_total;
}
/* ----------------------------------------------------------------------- */
void
erts_set_this_node(Eterm sysname, Uint32 creation)
{
ERTS_LC_ASSERT(erts_thr_progress_is_blocking());
ASSERT(2 <= de_refc_read(erts_this_dist_entry, 2));
if (erts_refc_dectest(&erts_this_node->refc, 0) == 0)
try_delete_node(erts_this_node);
erts_deref_dist_entry(erts_this_dist_entry);
erts_this_node = NULL; /* to make sure refc is bumped for this node */
erts_this_node = erts_find_or_insert_node(sysname, creation, THE_NON_VALUE);
erts_this_dist_entry = erts_this_node->dist_entry;
erts_ref_dist_entry(erts_this_dist_entry);
erts_this_node_sysname = erts_this_node_sysname_BUFFER;
erts_snprintf(erts_this_node_sysname, sizeof(erts_this_node_sysname_BUFFER),
"%T", sysname);
}
Uint
erts_delayed_node_table_gc(void)
{
if (node_tab_delete_delay < 0)
return (Uint) ERTS_NODE_TAB_DELAY_GC_INFINITY;
if (node_tab_delete_delay == 0)
return (Uint) 0;
return (Uint) ((node_tab_delete_delay-1)/1000 + 1);
}
void erts_init_node_tables(int dd_sec)
{
erts_rwmtx_opt_t rwmtx_opt = ERTS_RWMTX_OPT_DEFAULT_INITER;
HashFunctions f;
ErlNode node_tmpl;
if (dd_sec == ERTS_NODE_TAB_DELAY_GC_INFINITY)
node_tab_delete_delay = (ErtsMonotonicTime) -1;
else
node_tab_delete_delay = ((ErtsMonotonicTime) dd_sec)*1000;
orig_node_tab_delete_delay = node_tab_delete_delay;
rwmtx_opt.type = ERTS_RWMTX_TYPE_FREQUENT_READ;
rwmtx_opt.lived = ERTS_RWMTX_LONG_LIVED;
erts_rwmtx_init_opt(&erts_node_table_rwmtx, &rwmtx_opt, "node_table", NIL,
ERTS_LOCK_FLAGS_PROPERTY_STATIC | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION);
erts_rwmtx_init_opt(&erts_dist_table_rwmtx, &rwmtx_opt, "dist_table", NIL,
ERTS_LOCK_FLAGS_PROPERTY_STATIC | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION);
f.hash = (H_FUN) dist_table_hash;
f.cmp = (HCMP_FUN) dist_table_cmp;
f.alloc = (HALLOC_FUN) dist_table_alloc;
f.free = (HFREE_FUN) dist_table_free;
f.meta_alloc = (HMALLOC_FUN) erts_alloc;
f.meta_free = (HMFREE_FUN) erts_free;
f.meta_print = (HMPRINT_FUN) erts_print;
hash_init(ERTS_ALC_T_DIST_TABLE, &erts_dist_table, "dist_table", 11, f);
f.hash = (H_FUN) node_table_hash;
f.cmp = (HCMP_FUN) node_table_cmp;
f.alloc = (HALLOC_FUN) node_table_alloc;
f.free = (HFREE_FUN) node_table_free;
hash_init(ERTS_ALC_T_NODE_TABLE, &erts_node_table, "node_table", 11, f);
erts_hidden_dist_entries = NULL;
erts_visible_dist_entries = NULL;
erts_pending_dist_entries = NULL;
erts_not_connected_dist_entries = NULL;
erts_no_of_hidden_dist_entries = 0;
erts_no_of_visible_dist_entries = 0;
erts_no_of_pending_dist_entries = 0;
erts_no_of_not_connected_dist_entries = 0;
node_tmpl.sysname = am_Noname;
node_tmpl.creation = 0;
erts_this_node = hash_put(&erts_node_table, &node_tmpl);
/* +1 for erts_this_node */
erts_init_node_entry(erts_this_node, 1);
ASSERT(erts_this_node->dist_entry != NULL);
erts_this_dist_entry = erts_this_node->dist_entry;
/* +1 for erts_this_dist_entry */
erts_ref_dist_entry(erts_this_dist_entry);
ASSERT(2 == de_refc_read(erts_this_dist_entry, 2));
erts_this_node_sysname = erts_this_node_sysname_BUFFER;
erts_snprintf(erts_this_node_sysname, sizeof(erts_this_node_sysname_BUFFER),
"%T", erts_this_node->sysname);
references_atoms_need_init = 1;
}
#ifdef ERTS_ENABLE_LOCK_CHECK
int erts_lc_is_de_rwlocked(DistEntry *dep)
{
return erts_lc_rwmtx_is_rwlocked(&dep->rwmtx);
}
int erts_lc_is_de_rlocked(DistEntry *dep)
{
return erts_lc_rwmtx_is_rlocked(&dep->rwmtx);
}
#endif
#ifdef ERTS_ENABLE_LOCK_COUNT
static void erts_lcnt_enable_dist_lock_count(void *dep_raw, void *enable) {
DistEntry *dep = (DistEntry*)dep_raw;
if(enable) {
erts_lcnt_install_new_lock_info(&dep->rwmtx.lcnt, "dist_entry", dep->sysname,
ERTS_LOCK_TYPE_RWMUTEX | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION);
erts_lcnt_install_new_lock_info(&dep->qlock.lcnt, "dist_entry_out_queue", dep->sysname,
ERTS_LOCK_TYPE_MUTEX | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION);
if (dep->mld)
erts_lcnt_install_new_lock_info(&dep->mld->mtx.lcnt, "dist_entry_links", dep->sysname,
ERTS_LOCK_TYPE_MUTEX | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION);
} else {
erts_lcnt_uninstall(&dep->rwmtx.lcnt);
erts_lcnt_uninstall(&dep->qlock.lcnt);
if (dep->mld)
erts_lcnt_uninstall(&dep->mld->mtx.lcnt);
}
}
void erts_lcnt_update_distribution_locks(int enable) {
erts_rwmtx_rlock(&erts_dist_table_rwmtx);
hash_foreach(&erts_dist_table, erts_lcnt_enable_dist_lock_count,
(void*)(UWord)enable);
erts_rwmtx_runlock(&erts_dist_table_rwmtx);
}
#endif
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
* The following is only supposed to be used for testing, and debugging. *
* *
* erts_get_node_and_dist_references() returns a table of all references to *
* all entries in the node and dist tables. The hole system will be searched *
* at once. This will give a consistent view over the references, but can *
* can damage the real-time properties of the system. *
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include "erl_db.h"
#undef INIT_AM
#define INIT_AM(S) AM_ ## S = am_atom_put(#S, sizeof(#S) - 1)
static Eterm AM_heap;
static Eterm AM_link;
static Eterm AM_monitor;
static Eterm AM_process;
static Eterm AM_port;
static Eterm AM_ets;
static Eterm AM_binary;
static Eterm AM_match_spec;
static Eterm AM_control;
static Eterm AM_dist;
static Eterm AM_node;
static Eterm AM_dist_references;
static Eterm AM_node_references;
static Eterm AM_system;
static Eterm AM_timer;
static Eterm AM_delayed_delete_timer;
static Eterm AM_thread_progress_delete_timer;
static Eterm AM_sequence;
static Eterm AM_signal;
static void setup_reference_table(void);
static Eterm reference_table_term(Uint **hpp, ErlOffHeap *ohp, Uint *szp);
static void delete_reference_table(void);
#undef ERTS_MAX__
#define ERTS_MAX__(A, B) ((A) > (B) ? (A) : (B))
#define ID_HEAP_SIZE \
ERTS_MAX__(ERTS_MAGIC_REF_THING_SIZE, \
ERTS_MAX__(BIG_UINT_HEAP_SIZE, 3))
typedef struct node_referrer_ {
struct node_referrer_ *next;
int heap_ref;
int link_ref;
int monitor_ref;
int ets_ref;
int bin_ref;
int timer_ref;
int system_ref;
int signal_ref;
Eterm id;
Uint id_heap[ID_HEAP_SIZE];
ErlOffHeap off_heap;
} NodeReferrer;
typedef struct {
ErlNode *node;
NodeReferrer *referrers;
} ReferredNode;
typedef struct dist_referrer_ {
struct dist_referrer_ *next;
int heap_ref;
int ets_ref;
int node_ref;
int ctrl_ref;
int system_ref;
int signal_ref;
int sequence_ref;
Eterm id;
Uint creation;
Uint id_heap[ID_HEAP_SIZE];
} DistReferrer;
typedef struct {
DistEntry *dist;
DistReferrer *referrers;
} ReferredDist;
typedef struct inserted_bin_ {
struct inserted_bin_ *next;
Binary *bin_val;
} InsertedBin;
static ReferredNode *referred_nodes;
static int no_referred_nodes;
static ReferredDist *referred_dists;
static int no_referred_dists;
static InsertedBin *inserted_bins;
Eterm
erts_get_node_and_dist_references(struct process *proc)
{
Uint *hp;
Uint size;
Eterm res;
#ifdef DEBUG
Uint *endp;
#endif
erts_proc_unlock(proc, ERTS_PROC_LOCK_MAIN);
erts_thr_progress_block();
/* No need to lock any thing since we are alone... */
if (references_atoms_need_init) {
INIT_AM(heap);
INIT_AM(link);
INIT_AM(monitor);
INIT_AM(process);
INIT_AM(port);
INIT_AM(ets);
INIT_AM(binary);
INIT_AM(match_spec);
INIT_AM(control);
INIT_AM(dist);
INIT_AM(node);
INIT_AM(dist_references);
INIT_AM(node_references);
INIT_AM(timer);
INIT_AM(system);
INIT_AM(delayed_delete_timer);
INIT_AM(thread_progress_delete_timer);
INIT_AM(signal);
INIT_AM(sequence);
references_atoms_need_init = 0;
}
setup_reference_table();
/* Get term size */
size = 0;
(void) reference_table_term(NULL, NULL, &size);
hp = HAlloc(proc, size);
#ifdef DEBUG
ASSERT(size > 0);
endp = hp + size;
#endif
/* Write term */
res = reference_table_term(&hp, &proc->off_heap, NULL);
ASSERT(endp == hp);
delete_reference_table();
erts_thr_progress_unblock();
erts_proc_lock(proc, ERTS_PROC_LOCK_MAIN);
return res;
}
#define HEAP_REF 1
#define LINK_REF 2
#define ETS_REF 3
#define BIN_REF 4
#define NODE_REF 5
#define CTRL_REF 6
#define MONITOR_REF 7
#define TIMER_REF 8
#define SYSTEM_REF 9
#define SIGNAL_REF 10
#define SEQUENCE_REF 11
#define INC_TAB_SZ 11
static void
insert_dist_referrer(ReferredDist *referred_dist,
int type,
Eterm id,
Uint creation)
{
DistReferrer *drp;
for(drp = referred_dist->referrers; drp; drp = drp->next)
if(id == drp->id && (type == CTRL_REF
|| creation == drp->creation))
break;
if(!drp) {
drp = (DistReferrer *) erts_alloc(ERTS_ALC_T_NC_TMP,
sizeof(DistReferrer));
drp->next = referred_dist->referrers;
referred_dist->referrers = drp;
if(IS_CONST(id))
drp->id = id;
else {
Uint *hp = &drp->id_heap[0];
ASSERT(is_tuple(id));
drp->id = copy_struct(id, size_object(id), &hp, NULL);
}
drp->creation = creation;
drp->heap_ref = 0;
drp->ets_ref = 0;
drp->node_ref = 0;
drp->ctrl_ref = 0;
drp->system_ref = 0;
drp->signal_ref = 0;
drp->sequence_ref = 0;
}
switch (type) {
case NODE_REF: drp->node_ref++; break;
case CTRL_REF: drp->ctrl_ref++; break;
case HEAP_REF: drp->heap_ref++; break;
case ETS_REF: drp->ets_ref++; break;
case SYSTEM_REF: drp->system_ref++; break;
case SIGNAL_REF: drp->signal_ref++; break;
case SEQUENCE_REF: drp->sequence_ref++; break;
default: ASSERT(0);
}
}
static void
insert_dist_entry(DistEntry *dist, int type, Eterm id, Uint creation)
{
ReferredDist *rdp = NULL;
int i;
for(i = 0; i < no_referred_dists; i++) {
if(dist == referred_dists[i].dist) {
rdp = &referred_dists[i];
break;
}
}
if(!rdp)
erts_exit(ERTS_ERROR_EXIT,
"Reference to non-existing distribution table entry found!\n");
insert_dist_referrer(rdp, type, id, creation);
}
static void
insert_node_referrer(ReferredNode *referred_node, int type, Eterm id)
{
NodeReferrer *nrp;
for(nrp = referred_node->referrers; nrp; nrp = nrp->next)
if(EQ(id, nrp->id))
break;
if(!nrp) {
nrp = (NodeReferrer *) erts_alloc(ERTS_ALC_T_NC_TMP,
sizeof(NodeReferrer));
nrp->next = referred_node->referrers;
ERTS_INIT_OFF_HEAP(&nrp->off_heap);
referred_node->referrers = nrp;
if(IS_CONST(id))
nrp->id = id;
else {
Uint *hp = &nrp->id_heap[0];
ASSERT(is_big(id) || is_tuple(id) || is_internal_magic_ref(id));
nrp->id = copy_struct(id, size_object(id), &hp, &nrp->off_heap);
}
nrp->heap_ref = 0;
nrp->link_ref = 0;
nrp->monitor_ref = 0;
nrp->ets_ref = 0;
nrp->bin_ref = 0;
nrp->timer_ref = 0;
nrp->system_ref = 0;
nrp->signal_ref = 0;
}
switch (type) {
case HEAP_REF: nrp->heap_ref++; break;
case LINK_REF: nrp->link_ref++; break;
case ETS_REF: nrp->ets_ref++; break;
case BIN_REF: nrp->bin_ref++; break;
case MONITOR_REF: nrp->monitor_ref++; break;
case TIMER_REF: nrp->timer_ref++; break;
case SYSTEM_REF: nrp->system_ref++; break;
case SIGNAL_REF: nrp->signal_ref++; break;
default: ASSERT(0);
}
}
static void
insert_node(ErlNode *node, int type, Eterm id)
{
int i;
ReferredNode *rnp = NULL;
for(i = 0; i < no_referred_nodes; i++) {
if(node == referred_nodes[i].node) {
rnp = &referred_nodes[i];
break;
}
}
if (!rnp)
erts_exit(ERTS_ERROR_EXIT, "Reference to non-existing node table entry found!\n");
insert_node_referrer(rnp, type, id);
}
static void
insert_erl_node(void *venp, void *unused)
{
ErlNode *enp = (ErlNode *) venp;
insert_dist_entry(enp->dist_entry, NODE_REF, enp->sysname, enp->creation);
}
struct insert_offheap2_arg {
int type;
Eterm id;
};
static void insert_offheap(ErlOffHeap *, int, Eterm);
static void
insert_offheap2(ErlOffHeap *oh, void *arg)
{
struct insert_offheap2_arg *a = (struct insert_offheap2_arg *) arg;
insert_offheap(oh, a->type, a->id);
}
#define ErtsIsDistEntryBinary(Bin) \
(((Bin)->intern.flags & BIN_FLAG_MAGIC) \
&& ERTS_MAGIC_BIN_DESTRUCTOR((Bin)) == erts_dist_entry_destructor)
#define IsSendCtxBinary(Bin) \
(((Bin)->intern.flags & BIN_FLAG_MAGIC) \
&& ERTS_MAGIC_BIN_DESTRUCTOR((Bin)) == erts_dsend_context_dtor)
static void
insert_offheap(ErlOffHeap *oh, int type, Eterm id)
{
union erl_off_heap_ptr u;
struct insert_offheap2_arg a;
a.type = BIN_REF;
for (u.hdr = oh->first; u.hdr; u.hdr = u.hdr->next) {
switch (thing_subtag(u.hdr->thing_word)) {
case REF_SUBTAG:
if (ErtsIsDistEntryBinary(u.mref->mb))
insert_dist_entry(ErtsBin2DistEntry(u.mref->mb),
type, id, 0);
else if(IsMatchProgBinary(u.mref->mb)) {
InsertedBin *ib;
int insert_bin = 1;
for (ib = inserted_bins; ib; ib = ib->next)
if(ib->bin_val == (Binary *) u.mref->mb) {
insert_bin = 0;
break;
}
if (insert_bin) {
DeclareTmpHeapNoproc(id_heap,BIG_UINT_HEAP_SIZE);
Uint *hp = &id_heap[0];
InsertedBin *nib;
UseTmpHeapNoproc(BIG_UINT_HEAP_SIZE);
a.id = erts_bld_uint(&hp, NULL, (Uint) u.mref->mb);
erts_match_prog_foreach_offheap((Binary *) u.mref->mb,
insert_offheap2,
(void *) &a);
nib = erts_alloc(ERTS_ALC_T_NC_TMP, sizeof(InsertedBin));
nib->bin_val = (Binary *) u.mref->mb;
nib->next = inserted_bins;
inserted_bins = nib;
UnUseTmpHeapNoproc(BIG_UINT_HEAP_SIZE);
}
}
else if (IsSendCtxBinary(u.mref->mb)) {
ErtsDSigSendContext* ctx = ERTS_MAGIC_BIN_DATA(u.mref->mb);
if (ctx->deref_dep)
insert_dist_entry(ctx->dep, type, id, 0);
}
break;
case REFC_BINARY_SUBTAG:
case FUN_SUBTAG:
break; /* No need to */
default:
ASSERT(is_external_header(u.hdr->thing_word));
insert_node(u.ext->node, type, id);
break;
}
}
}
static void insert_monitor_data(ErtsMonitor *mon, int type, Eterm id)
{
ErtsMonitorData *mdp = erts_monitor_to_data(mon);
if ((mdp->origin.flags & (ERTS_ML_FLG_DBG_VISITED
| ERTS_ML_FLG_EXTENDED)) == ERTS_ML_FLG_EXTENDED) {
if (mon->type != ERTS_MON_TYPE_NODE) {
ErtsMonitorDataExtended *mdep = (ErtsMonitorDataExtended *) mdp;
ASSERT(mon->flags & ERTS_ML_FLG_EXTENDED);
if (mdep->uptr.ohhp) {
ErlOffHeap oh;
ERTS_INIT_OFF_HEAP(&oh);
oh.first = mdep->uptr.ohhp;
insert_offheap(&oh, type, id);
}
}
}
mdp->origin.flags |= ERTS_ML_FLG_DBG_VISITED;
}
static int insert_monitor(ErtsMonitor *mon, void *idp, Sint reds)
{
Eterm id = *((Eterm *) idp);
insert_monitor_data(mon, MONITOR_REF, id);
return 1;
}
static int clear_visited_monitor(ErtsMonitor *mon, void *p, Sint reds)
{
ErtsMonitorData *mdp = erts_monitor_to_data(mon);
mdp->origin.flags &= ~ERTS_ML_FLG_DBG_VISITED;
return 1;
}
static void
insert_p_monitors(ErtsPTabElementCommon *p)
{
Eterm id = p->id;
erts_monitor_tree_foreach(p->u.alive.monitors,
insert_monitor,
(void *) &id);
erts_monitor_list_foreach(p->u.alive.lt_monitors,
insert_monitor,
(void *) &id);
}
static void
insert_dist_monitors(DistEntry *dep)
{
if (dep->mld) {
erts_monitor_list_foreach(dep->mld->monitors,
insert_monitor,
(void *) &dep->sysname);
erts_monitor_tree_foreach(dep->mld->orig_name_monitors,
insert_monitor,
(void *) &dep->sysname);
}
}
static int
insert_sequence(ErtsDistExternal *edep, void *arg, Sint reds)
{
insert_dist_entry(edep->dep, SEQUENCE_REF, *(Eterm*)arg, 0);
return 1;
}
static void
insert_dist_sequences(DistEntry *dep)
{
erts_dist_seq_tree_foreach(dep, insert_sequence, (void *) &dep->sysname);
}
static void
clear_visited_p_monitors(ErtsPTabElementCommon *p)
{
erts_monitor_tree_foreach(p->u.alive.monitors,
clear_visited_monitor,
NULL);
erts_monitor_list_foreach(p->u.alive.lt_monitors,
clear_visited_monitor,
NULL);
}
static void
clear_visited_dist_monitors(DistEntry *dep)
{
if (dep->mld) {
erts_monitor_list_foreach(dep->mld->monitors,
clear_visited_monitor,
NULL);
erts_monitor_tree_foreach(dep->mld->orig_name_monitors,
clear_visited_monitor,
NULL);
}
}
static void insert_link_data(ErtsLink *lnk, int type, Eterm id)
{
ErtsLinkData *ldp = erts_link_to_data(lnk);
if ((ldp->a.flags & (ERTS_ML_FLG_DBG_VISITED
| ERTS_ML_FLG_EXTENDED)) == ERTS_ML_FLG_EXTENDED) {
ErtsLinkDataExtended *ldep = (ErtsLinkDataExtended *) ldp;
if (ldep->ohhp) {
ErlOffHeap oh;
ERTS_INIT_OFF_HEAP(&oh);
oh.first = ldep->ohhp;
insert_offheap(&oh, type, id);
}
}
ldp->a.flags |= ERTS_ML_FLG_DBG_VISITED;
}
static int insert_link(ErtsLink *lnk, void *idp, Sint reds)
{
Eterm id = *((Eterm *) idp);
insert_link_data(lnk, LINK_REF, id);
return 1;
}
static int clear_visited_link(ErtsLink *lnk, void *p, Sint reds)
{
ErtsLinkData *ldp = erts_link_to_data(lnk);
ldp->a.flags &= ~ERTS_ML_FLG_DBG_VISITED;
return 1;
}
static void
insert_p_links(ErtsPTabElementCommon *p)
{
Eterm id = p->id;
erts_link_tree_foreach(p->u.alive.links, insert_link, (void *) &id);
}
static void
insert_dist_links(DistEntry *dep)
{
if (dep->mld)
erts_link_list_foreach(dep->mld->links,
insert_link,
(void *) &dep->sysname);
}
static void
clear_visited_p_links(ErtsPTabElementCommon *p)
{
erts_link_tree_foreach(p->u.alive.links,
clear_visited_link,
NULL);
}
static void
clear_visited_dist_links(DistEntry *dep)
{
if (dep->mld)
erts_link_list_foreach(dep->mld->links,
clear_visited_link,
NULL);
}
static void
insert_ets_table(DbTable *tab, void *unused)
{
ErlOffHeap off_heap;
Eterm heap[ERTS_MAGIC_REF_THING_SIZE];
struct insert_offheap2_arg a;
a.type = ETS_REF;
if (tab->common.status & DB_NAMED_TABLE)
a.id = tab->common.the_name;
else {
Eterm *hp = &heap[0];
ERTS_INIT_OFF_HEAP(&off_heap);
a.id = erts_mk_magic_ref(&hp, &off_heap, tab->common.btid);
}
erts_db_foreach_offheap(tab, insert_offheap2, (void *) &a);
if (is_not_atom(a.id))
erts_cleanup_offheap(&off_heap);
}
static void
insert_bif_timer(Eterm receiver, Eterm msg, ErlHeapFragment *bp, void *arg)
{
if (bp) {
DeclareTmpHeapNoproc(heap,3);
UseTmpHeapNoproc(3);
insert_offheap(&bp->off_heap,
TIMER_REF,
(is_internal_pid(receiver)
? receiver
: TUPLE2(&heap[0], AM_process, receiver)));
UnUseTmpHeapNoproc(3);
}
}
static void
init_referred_node(void *node, void *unused)
{
referred_nodes[no_referred_nodes].node = (ErlNode *) node;
referred_nodes[no_referred_nodes].referrers = NULL;
no_referred_nodes++;
}
static void
init_referred_dist(void *dist, void *unused)
{
referred_dists[no_referred_dists].dist = (DistEntry *) dist;
referred_dists[no_referred_dists].referrers = NULL;
no_referred_dists++;
}
static void
insert_sys_msg(Eterm from, Eterm to, Eterm msg, ErlHeapFragment *bp)
{
insert_offheap(&bp->off_heap, HEAP_REF, to);
}
static void
insert_delayed_delete_node(void *state,
ErtsMonotonicTime timeout_pos,
void *vnp)
{
Eterm heap[3];
insert_node((ErlNode *) vnp,
SYSTEM_REF,
TUPLE2(&heap[0], AM_system, AM_delayed_delete_timer));
}
static void
insert_thr_prgr_delete_dist_entry(void *arg, ErtsThrPrgrVal thr_prgr, void *vdep)
{
DistEntry *dep = vdep;
Eterm heap[3];
insert_dist_entry(dep,
SYSTEM_REF,
TUPLE2(&heap[0], AM_system, AM_thread_progress_delete_timer),
0);
}
static void
insert_delayed_delete_dist_entry(void *state,
ErtsMonotonicTime timeout_pos,
void *vdep)
{
DistEntry *dep = vdep;
Eterm heap[3];
insert_dist_entry(dep,
SYSTEM_REF,
TUPLE2(&heap[0], AM_system, AM_delayed_delete_timer),
0);
}
static void
insert_message(ErtsMessage *msg, int type, Process *proc)
{
ErlHeapFragment *heap_frag = NULL;
ASSERT(ERTS_SIG_IS_MSG(msg));
if (msg->data.attached) {
if (msg->data.attached == ERTS_MSG_COMBINED_HFRAG)
heap_frag = &msg->hfrag;
else if (ERTS_SIG_IS_INTERNAL_MSG(msg))
heap_frag = msg->data.heap_frag;
else {
heap_frag = msg->data.heap_frag;
insert_dist_entry(erts_get_dist_ext(heap_frag)->dep,
type, proc->common.id, 0);
}
}
while (heap_frag) {
insert_offheap(&(heap_frag->off_heap),
type,
proc->common.id);
heap_frag = heap_frag->next;
}
}
static void
insert_sig_msg(ErtsMessage *msg, void *arg)
{
insert_message(msg, SIGNAL_REF, (Process *) arg);
}
static void
insert_sig_offheap(ErlOffHeap *ohp, void *arg)
{
Process *proc = arg;
insert_offheap(ohp, SIGNAL_REF, proc->common.id);
}
static int
insert_sig_monitor(ErtsMonitor *mon, void *arg, Sint reds)
{
Process *proc = arg;
insert_monitor_data(mon, SIGNAL_REF, proc->common.id);
return 1;
}
static int
insert_sig_link(ErtsLink *lnk, void *arg, Sint reds)
{
Process *proc = arg;
insert_link_data(lnk, SIGNAL_REF, proc->common.id);
return 1;
}
static void
insert_sig_ext(ErtsDistExternal *edep, void *arg)
{
Process *proc = arg;
insert_dist_entry(edep->dep, SIGNAL_REF, proc->common.id, 0);
}
static void
insert_process(Process *proc)
{
int mli;
ErtsMessage *msg_list[] = {proc->msg_frag};
ErlHeapFragment *hfp;
/* Insert Heap */
insert_offheap(&(proc->off_heap),
HEAP_REF,
proc->common.id);
/* Insert heap fragments buffers */
for(hfp = proc->mbuf; hfp; hfp = hfp->next)
insert_offheap(&(hfp->off_heap),
HEAP_REF,
proc->common.id);
/* Insert msg buffers */
for (mli = 0; mli < sizeof(msg_list)/sizeof(msg_list[0]); mli++) {
ErtsMessage *msg;
for (msg = msg_list[mli]; msg; msg = msg->next)
insert_message(msg, HEAP_REF, proc);
}
/* Insert signal queue */
erts_proc_sig_debug_foreach_sig(proc,
insert_sig_msg,
insert_sig_offheap,
insert_sig_monitor,
insert_sig_link,
insert_sig_ext,
(void *) proc);
/* If the process is FREE, the proc->common field has been
re-used by the ptab delete, so we cannot trust it. */
if (!(erts_atomic32_read_nob(&proc->state) & ERTS_PSFLG_FREE)) {
/* Insert links */
insert_p_links(&proc->common);
/* Insert monitors */
insert_p_monitors(&proc->common);
}
{
DistEntry *dep = ERTS_PROC_GET_DIST_ENTRY(proc);
if (dep)
insert_dist_entry(dep,
CTRL_REF,
proc->common.id,
0);
}
}
static void
insert_dist_suspended_procs(DistEntry *dep)
{
ErtsProcList *plist = erts_proclist_peek_first(dep->suspended);
while (plist) {
if (is_not_immed(plist->u.pid))
insert_process(plist->u.p);
plist = erts_proclist_peek_next(dep->suspended, plist);
}
}
#ifdef ERL_NODE_BOOKKEEP
void
erts_node_bookkeep(ErlNode *np, Eterm term, int what)
{
erts_aint_t slot = (erts_atomic_inc_read_nob(&np->slot) - 1) % 1024;
ErtsSchedulerData *esdp = erts_get_scheduler_data();
Eterm who = THE_NON_VALUE;
ASSERT(np);
np->books[slot].what = what;
np->books[slot].term = term;
if (esdp->current_process) {
who = esdp->current_process->common.id;
} else if (esdp->current_port) {
who = esdp->current_port->common.id;
}
np->books[slot].who = who;
}
#endif
static void
setup_reference_table(void)
{
DistEntry *dep;
HashInfo hi;
int i, max;
DeclareTmpHeapNoproc(heap,3);
inserted_bins = NULL;
hash_get_info(&hi, &erts_node_table);
referred_nodes = erts_alloc(ERTS_ALC_T_NC_TMP,
hi.objs*sizeof(ReferredNode));
no_referred_nodes = 0;
hash_foreach(&erts_node_table, init_referred_node, NULL);
ASSERT(no_referred_nodes == hi.objs);
hash_get_info(&hi, &erts_dist_table);
referred_dists = erts_alloc(ERTS_ALC_T_NC_TMP,
hi.objs*sizeof(ReferredDist));
no_referred_dists = 0;
hash_foreach(&erts_dist_table, init_referred_dist, NULL);
ASSERT(no_referred_dists == hi.objs);
/* Go through the hole system, and build a table of all references
to ErlNode and DistEntry structures */
erts_debug_callback_timer_foreach(try_delete_node,
insert_delayed_delete_node,
NULL);
erts_debug_callback_timer_foreach(prepare_try_delete_dist_entry,
insert_delayed_delete_dist_entry,
NULL);
erts_debug_later_op_foreach(start_timer_delete_dist_entry,
insert_thr_prgr_delete_dist_entry,
NULL);
UseTmpHeapNoproc(3);
insert_node(erts_this_node,
SYSTEM_REF,
TUPLE2(&heap[0], AM_system, am_undefined));
insert_dist_entry(erts_this_dist_entry,
SYSTEM_REF,
TUPLE2(&heap[0], AM_system, am_undefined),
erts_this_node->creation);
UnUseTmpHeapNoproc(3);
max = erts_ptab_max(&erts_proc);
/* Insert all processes */
for (i = 0; i < max; i++) {
Process *proc = erts_pix2proc(i);
if (proc)
insert_process(proc);
}
erts_foreach_sys_msg_in_q(insert_sys_msg);
/* Insert all ports */
max = erts_ptab_max(&erts_port);
for (i = 0; i < max; i++) {
ErlOffHeap *ohp;
erts_aint32_t state;
Port *prt;
prt = erts_pix2port(i);
if (!prt)
continue;
state = erts_atomic32_read_nob(&prt->state);
if (state & ERTS_PORT_SFLGS_DEAD)
continue;
/* Insert links */
insert_p_links(&prt->common);
/* Insert monitors */
insert_p_monitors(&prt->common);
/* Insert port data */
ohp = erts_port_data_offheap(prt);
if (ohp)
insert_offheap(ohp, HEAP_REF, prt->common.id);
/* Insert controller */
dep = (DistEntry*) erts_prtsd_get(prt, ERTS_PRTSD_DIST_ENTRY);
if (dep)
insert_dist_entry(dep,
CTRL_REF,
prt->common.id,
0);
}
{ /* Add binaries stored elsewhere ... */
ErlOffHeap oh;
ProcBin pb[2];
int i = 0;
Binary *default_match_spec;
Binary *default_meta_match_spec;
oh.first = NULL;
/* Only the ProcBin members thing_word, val and next will be inspected
(by insert_offheap()) */
#undef ADD_BINARY
#define ADD_BINARY(Bin) \
if ((Bin)) { \
pb[i].thing_word = REFC_BINARY_SUBTAG; \
pb[i].val = (Bin); \
pb[i].next = oh.first; \
oh.first = (struct erl_off_heap_header*) &pb[i]; \
i++; \
}
erts_get_default_trace_pattern(NULL,
&default_match_spec,
&default_meta_match_spec,
NULL,
NULL);
ADD_BINARY(default_match_spec);
ADD_BINARY(default_meta_match_spec);
insert_offheap(&oh, BIN_REF, AM_match_spec);
#undef ADD_BINARY
}
/* Insert all dist links */
for(dep = erts_visible_dist_entries; dep; dep = dep->next) {
insert_dist_links(dep);
insert_dist_monitors(dep);
insert_dist_sequences(dep);
insert_dist_suspended_procs(dep);
}
for(dep = erts_hidden_dist_entries; dep; dep = dep->next) {
insert_dist_links(dep);
insert_dist_monitors(dep);
insert_dist_sequences(dep);
insert_dist_suspended_procs(dep);
}
for(dep = erts_pending_dist_entries; dep; dep = dep->next) {
insert_dist_links(dep);
insert_dist_monitors(dep);
insert_dist_sequences(dep);
insert_dist_suspended_procs(dep);
}
/* Not connected dist entries should not have any links,
but inspect them anyway */
for(dep = erts_not_connected_dist_entries; dep; dep = dep->next) {
insert_dist_links(dep);
insert_dist_monitors(dep);
insert_dist_sequences(dep);
insert_dist_suspended_procs(dep);
}
/* Insert all ets tables */
erts_db_foreach_table(insert_ets_table, NULL);
/* Insert all bif timers */
erts_debug_bif_timer_foreach(insert_bif_timer, NULL);
/* Insert node table (references to dist) */
hash_foreach(&erts_node_table, insert_erl_node, NULL);
}
/*
Returns an erlang term on this format:
{{node_references,
[{{Node, Creation}, Refc,
[{{ReferrerType, ID},
[{ReferenceType,References},
'...']},
'...']},
'...']},
{dist_references,
[{Node, Refc,
[{{ReferrerType, ID},
[{ReferenceType,References},
'...']},
'...']},
'...']}}
*/
static Eterm
reference_table_term(Uint **hpp, ErlOffHeap *ohp, Uint *szp)
{
#undef MK_2TUP
#undef MK_3TUP
#undef MK_CONS
#undef MK_UINT
#define MK_2TUP(E1, E2) erts_bld_tuple(hpp, szp, 2, (E1), (E2))
#define MK_3TUP(E1, E2, E3) erts_bld_tuple(hpp, szp, 3, (E1), (E2), (E3))
#define MK_CONS(CAR, CDR) erts_bld_cons(hpp, szp, (CAR), (CDR))
#define MK_UINT(UI) erts_bld_uint(hpp, szp, (UI))
int i;
Eterm tup;
Eterm tup2;
Eterm nl = NIL;
Eterm dl = NIL;
Eterm nrid;
for(i = 0; i < no_referred_nodes; i++) {
NodeReferrer *nrp;
Eterm nril = NIL;
for(nrp = referred_nodes[i].referrers; nrp; nrp = nrp->next) {
Eterm nrl = NIL;
/* NodeReferenceList = [{ReferenceType,References}] */
if(nrp->heap_ref) {
tup = MK_2TUP(AM_heap, MK_UINT(nrp->heap_ref));
nrl = MK_CONS(tup, nrl);
}
if(nrp->link_ref) {
tup = MK_2TUP(AM_link, MK_UINT(nrp->link_ref));
nrl = MK_CONS(tup, nrl);
}
if(nrp->monitor_ref) {
tup = MK_2TUP(AM_monitor, MK_UINT(nrp->monitor_ref));
nrl = MK_CONS(tup, nrl);
}
if(nrp->ets_ref) {
tup = MK_2TUP(AM_ets, MK_UINT(nrp->ets_ref));
nrl = MK_CONS(tup, nrl);
}
if(nrp->bin_ref) {
tup = MK_2TUP(AM_binary, MK_UINT(nrp->bin_ref));
nrl = MK_CONS(tup, nrl);
}
if(nrp->timer_ref) {
tup = MK_2TUP(AM_timer, MK_UINT(nrp->timer_ref));
nrl = MK_CONS(tup, nrl);
}
if(nrp->system_ref) {
tup = MK_2TUP(AM_system, MK_UINT(nrp->system_ref));
nrl = MK_CONS(tup, nrl);
}
if(nrp->signal_ref) {
tup = MK_2TUP(AM_signal, MK_UINT(nrp->signal_ref));
nrl = MK_CONS(tup, nrl);
}
nrid = nrp->id;
if (!IS_CONST(nrp->id)) {
Uint nrid_sz = size_object(nrp->id);
if (szp)
*szp += nrid_sz;
if (hpp)
nrid = copy_struct(nrp->id, nrid_sz, hpp, ohp);
}
if (is_internal_pid(nrid) || nrid == am_error_logger) {
ASSERT(!nrp->ets_ref && !nrp->bin_ref && !nrp->system_ref);
tup = MK_2TUP(AM_process, nrid);
}
else if (is_tuple(nrid)) {
Eterm *t;
ASSERT(!nrp->ets_ref && !nrp->bin_ref);
t = tuple_val(nrid);
ASSERT(2 == arityval(t[0]));
tup = MK_2TUP(t[1], t[2]);
}
else if(is_internal_port(nrid)) {
ASSERT(!nrp->heap_ref && !nrp->ets_ref && !nrp->bin_ref
&& !nrp->timer_ref && !nrp->system_ref && !nrp->signal_ref);
tup = MK_2TUP(AM_port, nrid);
}
else if(nrp->ets_ref) {
ASSERT(!nrp->heap_ref && !nrp->link_ref &&
!nrp->monitor_ref && !nrp->bin_ref
&& !nrp->timer_ref && !nrp->system_ref && !nrp->signal_ref);
tup = MK_2TUP(AM_ets, nrid);
}
else if(nrp->bin_ref) {
ASSERT(is_small(nrid) || is_big(nrid));
ASSERT(!nrp->heap_ref && !nrp->ets_ref && !nrp->link_ref &&
!nrp->monitor_ref && !nrp->timer_ref
&& !nrp->system_ref && !nrp->signal_ref);
tup = MK_2TUP(AM_match_spec, nrid);
}
else {
ASSERT(!nrp->heap_ref && !nrp->ets_ref && !nrp->bin_ref
&& !nrp->signal_ref);
ASSERT(is_atom(nrid));
tup = MK_2TUP(AM_dist, nrid);
}
tup = MK_2TUP(tup, nrl);
/* NodeReferenceIdList = [{{ReferrerType, ID}, NodeReferenceList}] */
nril = MK_CONS(tup, nril);
}
/* NodeList = [{{Node, Creation}, Refc, NodeReferenceIdList}] */
tup = MK_2TUP(referred_nodes[i].node->sysname,
MK_UINT(referred_nodes[i].node->creation));
tup = MK_3TUP(tup, MK_UINT(erts_refc_read(&referred_nodes[i].node->refc, 0)), nril);
nl = MK_CONS(tup, nl);
}
for(i = 0; i < no_referred_dists; i++) {
DistReferrer *drp;
Eterm dril = NIL;
for(drp = referred_dists[i].referrers; drp; drp = drp->next) {
Eterm drl = NIL;
/* DistReferenceList = [{ReferenceType,References}] */
if(drp->node_ref) {
tup = MK_2TUP(AM_node, MK_UINT(drp->node_ref));
drl = MK_CONS(tup, drl);
}
if(drp->ctrl_ref) {
tup = MK_2TUP(AM_control, MK_UINT(drp->ctrl_ref));
drl = MK_CONS(tup, drl);
}
if(drp->heap_ref) {
tup = MK_2TUP(AM_heap, MK_UINT(drp->heap_ref));
drl = MK_CONS(tup, drl);
}
if(drp->ets_ref) {
tup = MK_2TUP(AM_ets, MK_UINT(drp->ets_ref));
drl = MK_CONS(tup, drl);
}
if(drp->system_ref) {
tup = MK_2TUP(AM_system, MK_UINT(drp->system_ref));
drl = MK_CONS(tup, drl);
}
if(drp->sequence_ref) {
tup = MK_2TUP(AM_sequence, MK_UINT(drp->sequence_ref));
drl = MK_CONS(tup, drl);
}
if(drp->signal_ref) {
tup = MK_2TUP(AM_signal, MK_UINT(drp->signal_ref));
drl = MK_CONS(tup, drl);
}
if (is_internal_pid(drp->id)) {
ASSERT(!drp->node_ref);
tup = MK_2TUP(AM_process, drp->id);
}
else if(is_internal_port(drp->id)) {
ASSERT(drp->ctrl_ref && !drp->node_ref && !drp->signal_ref);
tup = MK_2TUP(AM_port, drp->id);
}
else if (is_tuple(drp->id)) {
Eterm *t;
ASSERT(drp->system_ref && !drp->node_ref
&& !drp->ctrl_ref && !drp->heap_ref && !drp->ets_ref
&& !drp->signal_ref);
t = tuple_val(drp->id);
ASSERT(2 == arityval(t[0]));
tup = MK_2TUP(t[1], t[2]);
}
else if (drp->ets_ref) {
ASSERT(!drp->heap_ref && !drp->node_ref &&
!drp->ctrl_ref && !drp->system_ref
&& !drp->signal_ref);
tup = MK_2TUP(AM_ets, drp->id);
}
else {
ASSERT(!drp->ctrl_ref && drp->node_ref && !drp->signal_ref);
ASSERT(is_atom(drp->id));
tup = MK_2TUP(drp->id, MK_UINT(drp->creation));
tup = MK_2TUP(AM_node, tup);
}
tup = MK_2TUP(tup, drl);
/* DistReferenceIdList =
[{{ReferrerType, ID}, DistReferenceList}] */
dril = MK_CONS(tup, dril);
}
/* DistList = [{Dist, Refc, ReferenceIdList}] */
tup = MK_3TUP(referred_dists[i].dist->sysname,
MK_UINT(de_refc_read(referred_dists[i].dist, 0)),
dril);
dl = MK_CONS(tup, dl);
}
/* {{node_references, NodeList}, {dist_references, DistList}} */
tup = MK_2TUP(AM_node_references, nl);
tup2 = MK_2TUP(AM_dist_references, dl);
tup = MK_2TUP(tup, tup2);
return tup;
#undef MK_2TUP
#undef MK_3TUP
#undef MK_CONS
#undef MK_UINT
}
static void noop_sig_msg(ErtsMessage *msg, void *arg)
{
}
static void noop_sig_offheap(ErlOffHeap *oh, void *arg)
{
}
static void noop_sig_ext(ErtsDistExternal *ext, void *arg)
{
}
static void
delete_reference_table(void)
{
DistEntry *dep;
int i, max;
for(i = 0; i < no_referred_nodes; i++) {
NodeReferrer *nrp;
NodeReferrer *tnrp;
nrp = referred_nodes[i].referrers;
while(nrp) {
erts_cleanup_offheap(&nrp->off_heap);
tnrp = nrp;
nrp = nrp->next;
erts_free(ERTS_ALC_T_NC_TMP, (void *) tnrp);
}
}
if (referred_nodes)
erts_free(ERTS_ALC_T_NC_TMP, (void *) referred_nodes);
for(i = 0; i < no_referred_dists; i++) {
DistReferrer *drp;
DistReferrer *tdrp;
drp = referred_dists[i].referrers;
while(drp) {
tdrp = drp;
drp = drp->next;
erts_free(ERTS_ALC_T_NC_TMP, (void *) tdrp);
}
}
if (referred_dists)
erts_free(ERTS_ALC_T_NC_TMP, (void *) referred_dists);
while(inserted_bins) {
InsertedBin *ib = inserted_bins;
inserted_bins = inserted_bins->next;
erts_free(ERTS_ALC_T_NC_TMP, (void *)ib);
}
/* Cleanup... */
max = erts_ptab_max(&erts_proc);
for (i = 0; i < max; i++) {
Process *proc = erts_pix2proc(i);
if (proc) {
clear_visited_p_links(&proc->common);
clear_visited_p_monitors(&proc->common);
erts_proc_sig_debug_foreach_sig(proc,
noop_sig_msg,
noop_sig_offheap,
clear_visited_monitor,
clear_visited_link,
noop_sig_ext,
(void *) proc);
}
}
max = erts_ptab_max(&erts_port);
for (i = 0; i < max; i++) {
erts_aint32_t state;
Port *prt;
prt = erts_pix2port(i);
if (!prt)
continue;
state = erts_atomic32_read_nob(&prt->state);
if (state & ERTS_PORT_SFLGS_DEAD)
continue;
clear_visited_p_links(&prt->common);
clear_visited_p_monitors(&prt->common);
}
for(dep = erts_visible_dist_entries; dep; dep = dep->next) {
clear_visited_dist_links(dep);
clear_visited_dist_monitors(dep);
}
for(dep = erts_hidden_dist_entries; dep; dep = dep->next) {
clear_visited_dist_links(dep);
clear_visited_dist_monitors(dep);
}
for(dep = erts_pending_dist_entries; dep; dep = dep->next) {
clear_visited_dist_links(dep);
clear_visited_dist_monitors(dep);
}
for(dep = erts_not_connected_dist_entries; dep; dep = dep->next) {
clear_visited_dist_links(dep);
clear_visited_dist_monitors(dep);
}
}
void
erts_debug_test_node_tab_delayed_delete(Sint64 millisecs)
{
erts_thr_progress_block();
if (millisecs < 0)
node_tab_delete_delay = orig_node_tab_delete_delay;
else
node_tab_delete_delay = millisecs;
erts_thr_progress_unblock();
}