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-rw-r--r--erts/emulator/beam/erl_monitors.c1073
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diff --git a/erts/emulator/beam/erl_monitors.c b/erts/emulator/beam/erl_monitors.c
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index 1c840d89f6..0000000000
--- a/erts/emulator/beam/erl_monitors.c
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@@ -1,1073 +0,0 @@
-/*
- * %CopyrightBegin%
- *
- * Copyright Ericsson AB 2004-2017. 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%
- */
-
-/**************************************************************************
- * Monitors and links data structure manipulation.
- * Monitors and links are organized as AVL trees with the reference as
- * key in the monitor case and the pid of the linked process as key in the
- * link case. Lookups the order of the references is somewhat special. Local
- * references are strictly smaller than remote references and are sorted
- * by inlined comparison functionality. Remote references are handled by the
- * usual cmp function.
- * Each Monitor is tagged with different tags depending on which end of the
- * monitor it is.
- * A monitor is removed either explicitly by reference or all monitors are
- * removed when the process exits. No need to access the monitor by pid.
- **************************************************************************/
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include "sys.h"
-#include "erl_vm.h"
-#include "global.h"
-#include "erl_process.h"
-#include "error.h"
-#include "erl_db.h"
-#include "bif.h"
-#include "big.h"
-#include "erl_monitors.h"
-#include "erl_bif_unique.h"
-
-#define STACK_NEED 50
-#define MAX_MONITORS 0xFFFFFFFFUL
-
-#define DIR_LEFT 0
-#define DIR_RIGHT 1
-#define DIR_END 2
-
-static erts_atomic_t tot_link_lh_size;
-
-/* Implements the sort order in monitor trees, which is different from
- the ordinary term order.
- No short local ref's should ever exist (the ref is created by the bif's
- in runtime), therefore:
- All local ref's are less than external ref's
- Local ref's are inline-compared,
- External ref's are compared by cmp */
-
-#if 0
-#define CMP_MON_REF(Ref1,Ref2) \
-cmp((Ref1),(Ref2)) /* XXX, the inline comparision yet to be done */
-#else
-#define CMP_MON_REF(Ref1,Ref2) cmp_mon_ref((Ref1),(Ref2))
-#endif
-
-static ERTS_INLINE int cmp_mon_ref(Eterm ref1, Eterm ref2)
-{
- Eterm *b1, *b2;
-
-
- b1 = boxed_val(ref1);
- b2 = boxed_val(ref2);
- if (is_ref_thing_header(*b1)) {
- if (is_ref_thing_header(*b2)) {
- Uint32 *num1, *num2;
- if (is_ordinary_ref_thing(b1)) {
- ErtsORefThing *rtp = (ErtsORefThing *) b1;
- num1 = rtp->num;
- }
- else {
- ErtsMRefThing *mrtp = (ErtsMRefThing *) b1;
- num1 = mrtp->mb->refn;
- }
- if (is_ordinary_ref_thing(b2)) {
- ErtsORefThing *rtp = (ErtsORefThing *) b2;
- num2 = rtp->num;
- }
- else {
- ErtsMRefThing *mrtp = (ErtsMRefThing *) b2;
- num2 = mrtp->mb->refn;
- }
- return erts_internal_ref_number_cmp(num1, num2);
- }
- return -1;
- }
- if (is_ref_thing_header(*b2)) {
- return 1;
- }
- return CMP(ref1,ref2);
-}
-
-#define CP_LINK_VAL(To, Hp, From) \
-do { \
- if (is_immed(From)) \
- (To) = (From); \
- else { \
- Uint i__; \
- Uint len__; \
- ASSERT((Hp)); \
- ASSERT(is_internal_ordinary_ref((From)) \
- || is_external((From))); \
- (To) = make_boxed((Hp)); \
- len__ = thing_arityval(*boxed_val((From))) + 1; \
- for(i__ = 0; i__ < len__; i__++) \
- (*((Hp)++)) = boxed_val((From))[i__]; \
- if (is_external((To))) { \
- external_thing_ptr((To))->next = NULL; \
- erts_refc_inc(&(external_thing_ptr((To))->node->refc), 2);\
- } \
- } \
-} while (0)
-
-static ErtsMonitor *create_monitor(Uint type, Eterm ref, UWord entity, Eterm name)
-{
- Uint mon_size = ERTS_MONITOR_SIZE;
- ErtsMonitor *n;
- Eterm *hp;
-
- mon_size += NC_HEAP_SIZE(ref);
- if (type != MON_NIF_TARGET && is_not_immed(entity)) {
- mon_size += NC_HEAP_SIZE(entity);
- }
-
- if (mon_size <= ERTS_MONITOR_SH_SIZE) {
- n = (ErtsMonitor *) erts_alloc(ERTS_ALC_T_MONITOR_SH,
- mon_size*sizeof(Uint));
- } else {
- n = (ErtsMonitor *) erts_alloc(ERTS_ALC_T_MONITOR_LH,
- mon_size*sizeof(Uint));
- erts_atomic_add_nob(&tot_link_lh_size, mon_size*sizeof(Uint));
- }
- hp = n->heap;
-
-
- n->left = n->right = NULL; /* Always the same initial value*/
- n->type = (Uint16) type;
- n->balance = 0; /* Always the same initial value */
- n->name = name; /* atom() or [] */
- CP_LINK_VAL(n->ref, hp, ref); /*XXX Unnecessary check, never immediate*/
- if (type == MON_NIF_TARGET)
- n->u.resource = (ErtsResource*)entity;
- else
- CP_LINK_VAL(n->u.pid, hp, (Eterm)entity);
-
- return n;
-}
-
-static ErtsLink *create_link(Uint type, Eterm pid)
-{
- Uint lnk_size = ERTS_LINK_SIZE;
- ErtsLink *n;
- Eterm *hp;
-
- if (is_not_immed(pid)) {
- lnk_size += NC_HEAP_SIZE(pid);
- }
-
- if (lnk_size <= ERTS_LINK_SH_SIZE) {
- n = (ErtsLink *) erts_alloc(ERTS_ALC_T_NLINK_SH,
- lnk_size*sizeof(Uint));
- } else {
- n = (ErtsLink *) erts_alloc(ERTS_ALC_T_NLINK_LH,
- lnk_size*sizeof(Uint));
- erts_atomic_add_nob(&tot_link_lh_size, lnk_size*sizeof(Uint));
- }
- hp = n->heap;
-
-
- n->left = n->right = NULL; /* Always the same initial value*/
- n->type = (Uint16) type;
- n->balance = 0; /* Always the same initial value */
- if (n->type == LINK_NODE) {
- ERTS_LINK_REFC(n) = 0;
- } else {
- ERTS_LINK_ROOT(n) = NULL;
- }
- CP_LINK_VAL(n->pid, hp, pid);
-
- return n;
-}
-
-#undef CP_LINK_VAL
-
-static ErtsSuspendMonitor *create_suspend_monitor(Eterm pid)
-{
- ErtsSuspendMonitor *smon = erts_alloc(ERTS_ALC_T_SUSPEND_MON,
- sizeof(ErtsSuspendMonitor));
- smon->left = smon->right = NULL; /* Always the same initial value */
- smon->balance = 0; /* Always the same initial value */
- smon->pending = 0;
- smon->active = 0;
- smon->pid = pid;
- return smon;
-}
-
-void
-erts_init_monitors(void)
-{
- erts_atomic_init_nob(&tot_link_lh_size, 0);
-}
-
-Uint
-erts_tot_link_lh_size(void)
-{
- return (Uint) erts_atomic_read_nob(&tot_link_lh_size);
-}
-
-void erts_destroy_monitor(ErtsMonitor *mon)
-{
- Uint mon_size = ERTS_MONITOR_SIZE;
- ErlNode *node;
-
- ASSERT(is_not_immed(mon->ref));
- mon_size += NC_HEAP_SIZE(mon->ref);
- if (is_external(mon->ref)) {
- node = external_thing_ptr(mon->ref)->node;
- erts_deref_node_entry(node);
- }
- if (mon->type != MON_NIF_TARGET && is_not_immed(mon->u.pid)) {
- mon_size += NC_HEAP_SIZE(mon->u.pid);
- if (is_external(mon->u.pid)) {
- node = external_thing_ptr(mon->u.pid)->node;
- erts_deref_node_entry(node);
- }
- }
- if (mon_size <= ERTS_MONITOR_SH_SIZE) {
- erts_free(ERTS_ALC_T_MONITOR_SH, (void *) mon);
- } else {
- erts_free(ERTS_ALC_T_MONITOR_LH, (void *) mon);
- erts_atomic_add_nob(&tot_link_lh_size, -1*mon_size*sizeof(Uint));
- }
-}
-
-void erts_destroy_link(ErtsLink *lnk)
-{
- Uint lnk_size = ERTS_LINK_SIZE;
- ErlNode *node;
-
- ASSERT(lnk->type == LINK_NODE || ERTS_LINK_ROOT(lnk) == NULL);
-
- if (is_not_immed(lnk->pid)) {
- lnk_size += NC_HEAP_SIZE(lnk->pid);
- if (is_external(lnk->pid)) {
- node = external_thing_ptr(lnk->pid)->node;
- erts_deref_node_entry(node);
- }
- }
- if (lnk_size <= ERTS_LINK_SH_SIZE) {
- erts_free(ERTS_ALC_T_NLINK_SH, (void *) lnk);
- } else {
- erts_free(ERTS_ALC_T_NLINK_LH, (void *) lnk);
- erts_atomic_add_nob(&tot_link_lh_size, -1*lnk_size*sizeof(Uint));
- }
-}
-
-void erts_destroy_suspend_monitor(ErtsSuspendMonitor *smon)
-{
- erts_free(ERTS_ALC_T_SUSPEND_MON, smon);
-}
-
-static void insertion_rotation(int dstack[], int dpos,
- void *tstack[], int tpos,
- int state) {
-
- ErtsMonitorOrLink **this;
- ErtsMonitorOrLink *p1, *p2, *p;
- int dir;
-
- while (state && ( dir = dstack[--dpos] ) != DIR_END) {
- this = tstack[--tpos];
- p = *this;
- if (dir == DIR_LEFT) {
- switch (p->balance) {
- case 1:
- p->balance = 0;
- state = 0;
- break;
- case 0:
- p->balance = -1;
- break;
- case -1: /* The icky case */
- p1 = p->left;
- if (p1->balance == -1) { /* Single LL rotation */
- p->left = p1->right;
- p1->right = p;
- p->balance = 0;
- (*this) = p1;
- } else { /* Double RR rotation */
- p2 = p1->right;
- p1->right = p2->left;
- p2->left = p1;
- p->left = p2->right;
- p2->right = p;
- p->balance = (p2->balance == -1) ? +1 : 0;
- p1->balance = (p2->balance == 1) ? -1 : 0;
- (*this) = p2;
- }
- (*this)->balance = 0;
- state = 0;
- break;
- }
- } else { /* dir == DIR_RIGHT */
- switch (p->balance) {
- case -1:
- p->balance = 0;
- state = 0;
- break;
- case 0:
- p->balance = 1;
- break;
- case 1:
- p1 = p->right;
- if (p1->balance == 1) { /* Single RR rotation */
- p->right = p1->left;
- p1->left = p;
- p->balance = 0;
- (*this) = p1;
- } else { /* Double RL rotation */
- p2 = p1->left;
- p1->left = p2->right;
- p2->right = p1;
- p->right = p2->left;
- p2->left = p;
- p->balance = (p2->balance == 1) ? -1 : 0;
- p1->balance = (p2->balance == -1) ? 1 : 0;
- (*this) = p2;
- }
- (*this)->balance = 0;
- state = 0;
- break;
- }
- }
- }
-}
-
-void erts_add_monitor(ErtsMonitor **root, Uint type, Eterm ref, UWord entity,
- Eterm name)
-{
- void *tstack[STACK_NEED];
- int tpos = 0;
- int dstack[STACK_NEED+1];
- int dpos = 1;
- int state = 0;
- ErtsMonitor **this = root;
- Sint c;
-
- ASSERT(is_internal_ordinary_ref(ref) || is_external_ref(ref));
-
- dstack[0] = DIR_END;
- for (;;) {
- if (!*this) { /* Found our place */
- state = 1;
- *this = create_monitor(type,ref,entity,name);
- break;
- } else if ((c = CMP_MON_REF(ref,(*this)->ref)) < 0) {
- /* go left */
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = this;
- this = &((*this)->left);
- } else if (c > 0) { /* go right */
- dstack[dpos++] = DIR_RIGHT;
- tstack[tpos++] = this;
- this = &((*this)->right);
- } else { /* Equal key is an error for monitors */
- erts_exit(ERTS_ERROR_EXIT,"Insertion of already present monitor!");
- break;
- }
- }
- insertion_rotation(dstack, dpos, tstack, tpos, state);
-}
-
-
-/* Returns 0 if OK, < 0 if already present */
-int erts_add_link(ErtsLink **root, Uint type, Eterm pid)
-{
- void *tstack[STACK_NEED];
- int tpos = 0;
- int dstack[STACK_NEED+1];
- int dpos = 1;
- int state = 0;
- ErtsLink **this = root;
- Sint c;
-
- dstack[0] = DIR_END;
- for (;;) {
- if (!*this) { /* Found our place */
- state = 1;
- *this = create_link(type,pid);
- break;
- } else if ((c = CMP(pid,(*this)->pid)) < 0) {
- /* go left */
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = this;
- this = &((*this)->left);
- } else if (c > 0) { /* go right */
- dstack[dpos++] = DIR_RIGHT;
- tstack[tpos++] = this;
- this = &((*this)->right);
- } else { /* Equal key is an error for monitors */
- return -1;
- }
- }
- insertion_rotation(dstack, dpos, tstack, tpos, state);
- return 0;
-}
-
-ErtsSuspendMonitor *
-erts_add_or_lookup_suspend_monitor(ErtsSuspendMonitor **root, Eterm pid)
-{
- void *tstack[STACK_NEED];
- int tpos = 0;
- int dstack[STACK_NEED+1];
- int dpos = 1;
- int state = 0;
- ErtsSuspendMonitor **this = root;
- ErtsSuspendMonitor *res;
- Sint c;
-
- dstack[0] = DIR_END;
- for (;;) {
- if (!*this) { /* Found our place */
- state = 1;
- res = *this = create_suspend_monitor(pid);
- break;
- } else if ((c = CMP(pid,(*this)->pid)) < 0) {
- /* go left */
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = this;
- this = &((*this)->left);
- } else if (c > 0) { /* go right */
- dstack[dpos++] = DIR_RIGHT;
- tstack[tpos++] = this;
- this = &((*this)->right);
- } else { /* Already here... */
- ASSERT((*this)->pid == pid);
- return *this;
- }
- }
- insertion_rotation(dstack, dpos, tstack, tpos, state);
- return res;
-}
-
-
-/* Returns the new or old link structure */
-ErtsLink *erts_add_or_lookup_link(ErtsLink **root, Uint type, Eterm pid)
-{
- void *tstack[STACK_NEED];
- int tpos = 0;
- int dstack[STACK_NEED+1];
- int dpos = 1;
- int state = 0;
- ErtsLink **this = root;
- Sint c;
- ErtsLink *ret = NULL;
-
- dstack[0] = DIR_END;
- for (;;) {
- if (!*this) { /* Found our place */
- state = 1;
- *this = create_link(type,pid);
- ret = *this;
- break;
- } else if ((c = CMP(pid,(*this)->pid)) < 0) {
- /* go left */
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = this;
- this = &((*this)->left);
- } else if (c > 0) { /* go right */
- dstack[dpos++] = DIR_RIGHT;
- tstack[tpos++] = this;
- this = &((*this)->right);
- } else { /* Equal key is an error for monitors */
- return *this;
- }
- }
- insertion_rotation(dstack, dpos, tstack, tpos, state);
- return ret;
-}
-
-
-/*
- * Deletion helpers
- */
-static int balance_left(ErtsMonitorOrLink **this)
-{
- ErtsMonitorOrLink *p, *p1, *p2;
- int b1, b2, h = 1;
-
- p = *this;
- switch (p->balance) {
- case -1:
- p->balance = 0;
- break;
- case 0:
- p->balance = 1;
- h = 0;
- break;
- case 1:
- p1 = p->right;
- b1 = p1->balance;
- if (b1 >= 0) { /* Single RR rotation */
- p->right = p1->left;
- p1->left = p;
- if (b1 == 0) {
- p->balance = 1;
- p1->balance = -1;
- h = 0;
- } else {
- p->balance = p1->balance = 0;
- }
- (*this) = p1;
- } else { /* Double RL rotation */
- p2 = p1->left;
- b2 = p2->balance;
- p1->left = p2->right;
- p2->right = p1;
- p->right = p2->left;
- p2->left = p;
- p->balance = (b2 == 1) ? -1 : 0;
- p1->balance = (b2 == -1) ? 1 : 0;
- p2->balance = 0;
- (*this) = p2;
- }
- break;
- }
- return h;
-}
-
-static int balance_right(ErtsMonitorOrLink **this)
-{
- ErtsMonitorOrLink *p, *p1, *p2;
- int b1, b2, h = 1;
-
- p = *this;
- switch (p->balance) {
- case 1:
- p->balance = 0;
- break;
- case 0:
- p->balance = -1;
- h = 0;
- break;
- case -1:
- p1 = p->left;
- b1 = p1->balance;
- if (b1 <= 0) { /* Single LL rotation */
- p->left = p1->right;
- p1->right = p;
- if (b1 == 0) {
- p->balance = -1;
- p1->balance = 1;
- h = 0;
- } else {
- p->balance = p1->balance = 0;
- }
- (*this) = p1;
- } else { /* Double LR rotation */
- p2 = p1->right;
- b2 = p2->balance;
- p1->right = p2->left;
- p2->left = p1;
- p->left = p2->right;
- p2->right = p;
- p->balance = (b2 == -1) ? 1 : 0;
- p1->balance = (b2 == 1) ? -1 : 0;
- p2->balance = 0;
- (*this) = p2;
- }
- }
- return h;
-}
-
-static int delsub(ErtsMonitorOrLink **this)
-{
- ErtsMonitorOrLink **tstack[STACK_NEED];
- int tpos = 0;
- ErtsMonitorOrLink *q = (*this);
- ErtsMonitorOrLink **r = &(q->left);
- int h;
-
- /*
- * Walk down the tree to the right and search
- * for a void right child, pick that child out
- * and return it to be put in the deleted
- * object's place.
- */
-
- while ((*r)->right != NULL) {
- tstack[tpos++] = r;
- r = &((*r)->right);
- }
- *this = *r;
- *r = (*r)->left;
- (*this)->left = q->left;
- (*this)->right = q->right;
- (*this)->balance = q->balance;
- tstack[0] = &((*this)->left);
- h = 1;
- while (tpos && h) {
- r = tstack[--tpos];
- h = balance_right(r);
- }
- return h;
-}
-
-ErtsMonitor *erts_remove_monitor(ErtsMonitor **root, Eterm ref)
-{
- ErtsMonitor **tstack[STACK_NEED];
- int tpos = 0;
- int dstack[STACK_NEED+1];
- int dpos = 1;
- int state = 0;
- ErtsMonitor **this = root;
- Sint c;
- int dir;
- ErtsMonitor *q = NULL;
-
- dstack[0] = DIR_END;
- for (;;) {
- if (!*this) { /* Failure */
- return NULL;
- } else if ((c = CMP_MON_REF(ref,(*this)->ref)) < 0) {
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = this;
- this = &((*this)->left);
- } else if (c > 0) { /* go right */
- dstack[dpos++] = DIR_RIGHT;
- tstack[tpos++] = this;
- this = &((*this)->right);
- } else { /* Equal key, found the one to delete */
- q = (*this);
- if (q->right == NULL) {
- (*this) = q->left;
- state = 1;
- } else if (q->left == NULL) {
- (*this) = q->right;
- state = 1;
- } else {
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = this;
- state = delsub((ErtsMonitorOrLink **) this);
- }
- break;
- }
- }
- while (state && ( dir = dstack[--dpos] ) != DIR_END) {
- this = tstack[--tpos];
- if (dir == DIR_LEFT) {
- state = balance_left((ErtsMonitorOrLink **) this);
- } else {
- state = balance_right((ErtsMonitorOrLink **) this);
- }
- }
- return q;
-}
-
-ErtsLink *erts_remove_link(ErtsLink **root, Eterm pid)
-{
- ErtsLink **tstack[STACK_NEED];
- int tpos = 0;
- int dstack[STACK_NEED+1];
- int dpos = 1;
- int state = 0;
- ErtsLink **this = root;
- Sint c;
- int dir;
- ErtsLink *q = NULL;
-
- dstack[0] = DIR_END;
- for (;;) {
- if (!*this) { /* Failure */
- return NULL;
- } else if ((c = CMP(pid,(*this)->pid)) < 0) {
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = this;
- this = &((*this)->left);
- } else if (c > 0) { /* go right */
- dstack[dpos++] = DIR_RIGHT;
- tstack[tpos++] = this;
- this = &((*this)->right);
- } else { /* Equal key, found the one to delete */
- q = (*this);
- if (q->right == NULL) {
- (*this) = q->left;
- state = 1;
- } else if (q->left == NULL) {
- (*this) = q->right;
- state = 1;
- } else {
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = this;
- state = delsub((ErtsMonitorOrLink **) this);
- }
- break;
- }
- }
- while (state && ( dir = dstack[--dpos] ) != DIR_END) {
- this = tstack[--tpos];
- if (dir == DIR_LEFT) {
- state = balance_left((ErtsMonitorOrLink **) this);
- } else {
- state = balance_right((ErtsMonitorOrLink **) this);
- }
- }
- return q;
-}
-
-void
-erts_delete_suspend_monitor(ErtsSuspendMonitor **root, Eterm pid)
-{
- ErtsSuspendMonitor **tstack[STACK_NEED];
- int tpos = 0;
- int dstack[STACK_NEED+1];
- int dpos = 1;
- int state = 0;
- ErtsSuspendMonitor **this = root;
- Sint c;
- int dir;
- ErtsSuspendMonitor *q = NULL;
-
- dstack[0] = DIR_END;
- for (;;) {
- if (!*this) { /* Nothing found */
- return;
- } else if ((c = CMP(pid,(*this)->pid)) < 0) {
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = this;
- this = &((*this)->left);
- } else if (c > 0) { /* go right */
- dstack[dpos++] = DIR_RIGHT;
- tstack[tpos++] = this;
- this = &((*this)->right);
- } else { /* Equal key, found the one to delete */
- q = (*this);
- ASSERT(q->pid == pid);
- if (q->right == NULL) {
- (*this) = q->left;
- state = 1;
- } else if (q->left == NULL) {
- (*this) = q->right;
- state = 1;
- } else {
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = this;
- state = delsub((ErtsMonitorOrLink **) this);
- }
- erts_destroy_suspend_monitor(q);
- break;
- }
- }
- while (state && ( dir = dstack[--dpos] ) != DIR_END) {
- this = tstack[--tpos];
- if (dir == DIR_LEFT) {
- state = balance_left((ErtsMonitorOrLink **) this);
- } else {
- state = balance_right((ErtsMonitorOrLink **) this);
- }
- }
-}
-
-ErtsMonitor *erts_lookup_monitor(ErtsMonitor *root, Eterm ref)
-{
- Sint c;
-
- for (;;) {
- if (root == NULL || (c = CMP_MON_REF(ref,root->ref)) == 0) {
- return root;
- } else if (c < 0) {
- root = root->left;
- } else { /* c > 0 */
- root = root->right;
- }
- }
-}
-
-ErtsLink *erts_lookup_link(ErtsLink *root, Eterm pid)
-{
- Sint c;
-
- for (;;) {
- if (root == NULL || (c = CMP(pid,root->pid)) == 0) {
- return root;
- } else if (c < 0) {
- root = root->left;
- } else { /* c > 0 */
- root = root->right;
- }
- }
-}
-
-ErtsSuspendMonitor *
-erts_lookup_suspend_monitor(ErtsSuspendMonitor *root, Eterm pid)
-{
- Sint c;
-
- for (;;) {
- if (root == NULL || (c = CMP(pid,root->pid)) == 0) {
- return root;
- } else if (c < 0) {
- root = root->left;
- } else { /* c > 0 */
- root = root->right;
- }
- }
-}
-
-void erts_sweep_monitors(ErtsMonitor *root,
- void (*doit)(ErtsMonitor *, void *),
- void *context)
-{
- ErtsMonitor *tstack[STACK_NEED];
- int tpos = 0;
- int dstack[STACK_NEED+1];
- int dpos = 1;
- int dir;
-
- dstack[0] = DIR_END;
-
- for (;;) {
- if (root == NULL) {
- if ((dir = dstack[dpos-1]) == DIR_END) {
- return;
- }
- if (dir == DIR_LEFT) {
- /* Still has DIR_RIGHT to do */
- dstack[dpos-1] = DIR_RIGHT;
- root = (tstack[tpos-1])->right;
- } else {
- /* stacktop is an object to be deleted */
- (*doit)(tstack[--tpos],context); /* expeted to do the
- deletion */
- --dpos;
- root = NULL;
- }
- } else {
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = root;
- root = root->left;
- }
- }
-}
-
-void erts_sweep_links(ErtsLink *root,
- void (*doit)(ErtsLink *, void *),
- void *context)
-{
- ErtsLink *tstack[STACK_NEED];
- int tpos = 0;
- int dstack[STACK_NEED+1];
- int dpos = 1;
- int dir;
-
- dstack[0] = DIR_END;
-
- for (;;) {
- if (root == NULL) {
- if ((dir = dstack[dpos-1]) == DIR_END) {
- return;
- }
- if (dir == DIR_LEFT) {
- /* Still has DIR_RIGHT to do */
- dstack[dpos-1] = DIR_RIGHT;
- root = (tstack[tpos-1])->right;
- } else {
- /* stacktop is an object to be deleted */
- (*doit)(tstack[--tpos],context); /* expeted to do the
- deletion */
- --dpos;
- root = NULL;
- }
- } else {
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = root;
- root = root->left;
- }
- }
-}
-
-void erts_sweep_suspend_monitors(ErtsSuspendMonitor *root,
- void (*doit)(ErtsSuspendMonitor *, void *),
- void *context)
-{
- ErtsSuspendMonitor *tstack[STACK_NEED];
- int tpos = 0;
- int dstack[STACK_NEED+1];
- int dpos = 1;
- int dir;
-
- dstack[0] = DIR_END;
-
- for (;;) {
- if (root == NULL) {
- if ((dir = dstack[dpos-1]) == DIR_END) {
- return;
- }
- if (dir == DIR_LEFT) {
- /* Still has DIR_RIGHT to do */
- dstack[dpos-1] = DIR_RIGHT;
- root = (tstack[tpos-1])->right;
- } else {
- /* stacktop is an object to be deleted */
- (*doit)(tstack[--tpos],context); /* expeted to do the
- deletion */
- --dpos;
- root = NULL;
- }
- } else {
- dstack[dpos++] = DIR_LEFT;
- tstack[tpos++] = root;
- root = root->left;
- }
- }
-}
-
-
-/* Debug BIF, always present, but undocumented... */
-
-static void erts_dump_monitors(ErtsMonitor *root, int indent)
-{
- if (root == NULL)
- return;
- erts_dump_monitors(root->right,indent+2);
- erts_printf("%*s[%b16d:%b16u:%T:%T", indent, "", root->balance,
- root->type, root->ref, root->name);
- if (root->type == MON_NIF_TARGET)
- erts_printf(":%p]\n", root->u.resource);
- else
- erts_printf(":%T]\n", root->u.pid);
- erts_dump_monitors(root->left,indent+2);
-}
-
-static void erts_dump_links_aux(ErtsLink *root, int indent,
- erts_dsprintf_buf_t *dsbufp)
-{
- if (root == NULL)
- return;
- erts_dump_links_aux(root->right, indent+2, dsbufp);
- dsbufp->str_len = 0;
- erts_dsprintf(dsbufp, "%*s[%b16d:%b16u:%T:%p]", indent, "",
- root->balance, root->type, root->pid, ERTS_LINK_ROOT(root));
- if (ERTS_LINK_ROOT(root) != NULL) {
- ErtsLink *sub = ERTS_LINK_ROOT(root);
- int len = dsbufp->str_len;
- erts_dump_links_aux(sub->right, indent+len+5, dsbufp);
- erts_dsprintf(dsbufp, "-> %*s[%b16d:%b16u:%T:%p]", indent, "",
- sub->balance, sub->type, sub->pid, ERTS_LINK_ROOT(sub));
- erts_printf("%s\n", dsbufp->str);
- erts_dump_links_aux(sub->left, indent+len+5, dsbufp);
- } else {
- erts_printf("%s\n", dsbufp->str);
- }
- erts_dump_links_aux(root->left, indent+2, dsbufp);
-}
-
-static void erts_dump_links(ErtsLink *root, int indent)
-{
- erts_dsprintf_buf_t *dsbufp = erts_create_tmp_dsbuf(0);
- erts_dump_links_aux(root, indent, dsbufp);
- erts_destroy_tmp_dsbuf(dsbufp);
-}
-
-Eterm erts_debug_dump_monitors_1(BIF_ALIST_1)
-{
- Process *p = BIF_P;
- Eterm pid = BIF_ARG_1;
- Process *rp;
- DistEntry *dep;
- rp = erts_pid2proc(p, ERTS_PROC_LOCK_MAIN, pid, ERTS_PROC_LOCK_LINK);
- if (!rp) {
- ERTS_ASSERT_IS_NOT_EXITING(p);
- if (is_atom(pid) && is_node_name_atom(pid) &&
- (dep = erts_find_dist_entry(pid)) != NULL) {
- erts_printf("Dumping dist monitors-------------------\n");
- erts_de_links_lock(dep);
- erts_dump_monitors(dep->monitors,0);
- erts_de_links_unlock(dep);
- erts_printf("Monitors dumped-------------------------\n");
- BIF_RET(am_true);
- } else {
- BIF_ERROR(p,BADARG);
- }
- } else {
- erts_printf("Dumping pid monitors--------------------\n");
- erts_dump_monitors(ERTS_P_MONITORS(rp),0);
- erts_printf("Monitors dumped-------------------------\n");
- erts_proc_unlock(rp, ERTS_PROC_LOCK_LINK);
- BIF_RET(am_true);
- }
-}
-
-Eterm erts_debug_dump_links_1(BIF_ALIST_1)
-{
- Process *p = BIF_P;
- Eterm pid = BIF_ARG_1;
- Process *rp;
- DistEntry *dep;
- if (is_internal_port(pid)) {
- Port *rport = erts_id2port_sflgs(pid,
- p,
- ERTS_PROC_LOCK_MAIN,
- ERTS_PORT_SFLGS_INVALID_LOOKUP);
- if (rport) {
- erts_printf("Dumping port links----------------------\n");
- erts_dump_links(ERTS_P_LINKS(rport), 0);
- erts_printf("Links dumped----------------------------\n");
- erts_port_release(rport);
- BIF_RET(am_true);
- } else {
- BIF_ERROR(p,BADARG);
- }
- } else {
- rp = erts_pid2proc(p, ERTS_PROC_LOCK_MAIN, pid, ERTS_PROC_LOCK_LINK);
- if (!rp) {
- ERTS_ASSERT_IS_NOT_EXITING(p);
- if (is_atom(pid) && is_node_name_atom(pid) &&
- (dep = erts_find_dist_entry(pid)) != NULL) {
- erts_printf("Dumping dist links----------------------\n");
- erts_de_links_lock(dep);
- erts_dump_links(dep->nlinks,0);
- erts_de_links_unlock(dep);
- erts_printf("Links dumped----------------------------\n");
- BIF_RET(am_true);
- } else {
- BIF_ERROR(p,BADARG);
- }
-
- } else {
- erts_printf("Dumping pid links-----------------------\n");
- erts_dump_links(ERTS_P_LINKS(rp), 0);
- erts_printf("Links dumped----------------------------\n");
- erts_proc_unlock(rp, ERTS_PROC_LOCK_LINK);
- BIF_RET(am_true);
- }
- }
-}
-
-void erts_one_link_size(ErtsLink *lnk, void *vpu)
-{
- Uint *pu = vpu;
- *pu += ERTS_LINK_SIZE*sizeof(Uint);
- if(is_not_immed(lnk->pid))
- *pu += NC_HEAP_SIZE(lnk->pid)*sizeof(Uint);
- if (lnk->type != LINK_NODE && ERTS_LINK_ROOT(lnk) != NULL) {
- erts_doforall_links(ERTS_LINK_ROOT(lnk),&erts_one_link_size,vpu);
- }
-}
-void erts_one_mon_size(ErtsMonitor *mon, void *vpu)
-{
- Uint *pu = vpu;
- *pu += ERTS_MONITOR_SIZE*sizeof(Uint);
- if(mon->type != MON_NIF_TARGET && is_not_immed(mon->u.pid))
- *pu += NC_HEAP_SIZE(mon->u.pid)*sizeof(Uint);
- if(is_not_immed(mon->ref))
- *pu += NC_HEAP_SIZE(mon->ref)*sizeof(Uint);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 03:06:08 +0000