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|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1997-2018. 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%
*/
/*
* Message passing primitives.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "sys.h"
#include "erl_vm.h"
#include "global.h"
#include "erl_message.h"
#include "erl_process.h"
#include "erl_binary.h"
#include "dtrace-wrapper.h"
#include "beam_bp.h"
#include "erl_proc_sig_queue.h"
ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(message_ref,
ErtsMessageRef,
ERL_MESSAGE_BUF_SZ,
ERTS_ALC_T_MSG_REF)
#if defined(DEBUG) && 0
#define HARD_DEBUG
#else
#undef HARD_DEBUG
#endif
void
init_message(void)
{
init_message_ref_alloc();
}
void *erts_alloc_message_ref(void)
{
return (void *) message_ref_alloc();
}
void erts_free_message_ref(void *mp)
{
message_ref_free((ErtsMessageRef *) mp);
}
/* Allocate message buffer (size in words) */
ErlHeapFragment*
new_message_buffer(Uint size)
{
ErlHeapFragment* bp;
bp = (ErlHeapFragment*) ERTS_HEAP_ALLOC(ERTS_ALC_T_HEAP_FRAG,
ERTS_HEAP_FRAG_SIZE(size));
ERTS_INIT_HEAP_FRAG(bp, size, size);
VERBOSE(DEBUG_SHCOPY, ("[pid=%T] new message buffer %p\n", erts_get_current_pid(), bp->mem));
return bp;
}
ErlHeapFragment*
erts_resize_message_buffer(ErlHeapFragment *bp, Uint size,
Eterm *brefs, Uint brefs_size)
{
#ifdef DEBUG
int i;
#endif
#ifdef HARD_DEBUG
ErlHeapFragment *dbg_bp;
Eterm *dbg_brefs;
Uint dbg_size;
Uint dbg_tot_size;
Eterm *dbg_hp;
#endif
ErlHeapFragment* nbp;
#ifdef DEBUG
{
Uint off_sz = size < bp->used_size ? size : bp->used_size;
for (i = 0; i < brefs_size; i++) {
Eterm *ptr;
if (is_immed(brefs[i]))
continue;
ptr = ptr_val(brefs[i]);
ASSERT(&bp->mem[0] <= ptr && ptr < &bp->mem[0] + off_sz);
}
}
#endif
if (size >= (bp->used_size - bp->used_size / 16)) {
bp->used_size = size;
return bp;
}
#ifdef HARD_DEBUG
dbg_brefs = erts_alloc(ERTS_ALC_T_UNDEF, sizeof(Eterm *)*brefs_size);
dbg_bp = new_message_buffer(bp->used_size);
dbg_hp = dbg_bp->mem;
dbg_tot_size = 0;
for (i = 0; i < brefs_size; i++) {
dbg_size = size_object(brefs[i]);
dbg_tot_size += dbg_size;
dbg_brefs[i] = copy_struct(brefs[i], dbg_size, &dbg_hp,
&dbg_bp->off_heap);
}
ASSERT(dbg_tot_size == (size < bp->used_size ? size : bp->used_size));
#endif
nbp = (ErlHeapFragment*) ERTS_HEAP_REALLOC(ERTS_ALC_T_HEAP_FRAG,
(void *) bp,
ERTS_HEAP_FRAG_SIZE(bp->alloc_size),
ERTS_HEAP_FRAG_SIZE(size));
if (bp != nbp) {
Uint off_sz = size < nbp->used_size ? size : nbp->used_size;
Eterm *sp = &bp->mem[0];
Eterm *ep = sp + off_sz;
Sint offs = &nbp->mem[0] - sp;
erts_offset_off_heap(&nbp->off_heap, offs, sp, ep);
erts_offset_heap(&nbp->mem[0], off_sz, offs, sp, ep);
if (brefs && brefs_size)
erts_offset_heap_ptr(brefs, brefs_size, offs, sp, ep);
#ifdef DEBUG
for (i = 0; i < brefs_size; i++) {
Eterm *ptr;
if (is_immed(brefs[i]))
continue;
ptr = ptr_val(brefs[i]);
ASSERT(&nbp->mem[0] <= ptr && ptr < &nbp->mem[0] + off_sz);
}
#endif
}
nbp->alloc_size = size;
nbp->used_size = size;
#ifdef HARD_DEBUG
for (i = 0; i < brefs_size; i++)
ASSERT(eq(dbg_brefs[i], brefs[i]));
free_message_buffer(dbg_bp);
erts_free(ERTS_ALC_T_UNDEF, dbg_brefs);
#endif
return nbp;
}
void
erts_cleanup_offheap(ErlOffHeap *offheap)
{
union erl_off_heap_ptr u;
for (u.hdr = offheap->first; u.hdr; u.hdr = u.hdr->next) {
switch (thing_subtag(u.hdr->thing_word)) {
case REFC_BINARY_SUBTAG:
erts_bin_release(u.pb->val);
break;
case FUN_SUBTAG:
if (erts_refc_dectest(&u.fun->fe->refc, 0) == 0) {
erts_erase_fun_entry(u.fun->fe);
}
break;
case REF_SUBTAG:
ASSERT(is_magic_ref_thing(u.hdr));
erts_bin_release((Binary *)u.mref->mb);
break;
default:
ASSERT(is_external_header(u.hdr->thing_word));
erts_deref_node_entry(u.ext->node, make_boxed(u.ep));
break;
}
}
}
void
free_message_buffer(ErlHeapFragment* bp)
{
ASSERT(bp != NULL);
do {
ErlHeapFragment* next_bp = bp->next;
erts_cleanup_offheap(&bp->off_heap);
ERTS_HEAP_FREE(ERTS_ALC_T_HEAP_FRAG, (void *) bp,
ERTS_HEAP_FRAG_SIZE(bp->alloc_size));
bp = next_bp;
}while (bp != NULL);
}
static void
erts_cleanup_message(ErtsMessage *mp)
{
ErlHeapFragment *bp;
if (ERTS_SIG_IS_EXTERNAL_MSG(mp) || ERTS_SIG_IS_NON_MSG(mp)) {
ErtsDistExternal *edep = erts_proc_sig_get_external(mp);
if (edep) {
erts_free_dist_ext_copy(edep);
if (mp->data.heap_frag == &mp->hfrag) {
ASSERT(ERTS_SIG_IS_EXTERNAL_MSG(mp));
mp->data.heap_frag = ERTS_MSG_COMBINED_HFRAG;
}
}
}
if (ERTS_SIG_IS_MSG(mp) && mp->data.attached != ERTS_MSG_COMBINED_HFRAG) {
bp = mp->data.heap_frag;
} else {
/* All non msg signals are combined HFRAG messages,
but we overwrite the mp->data field with the
nm_signal queue ptr so have to fix that here
before freeing it. */
mp->data.attached = ERTS_MSG_COMBINED_HFRAG;
bp = mp->hfrag.next;
erts_cleanup_offheap(&mp->hfrag.off_heap);
}
if (bp)
free_message_buffer(bp);
}
void
erts_cleanup_messages(ErtsMessage *msgp)
{
ErtsMessage *mp = msgp;
while (mp) {
ErtsMessage *fmp;
erts_cleanup_message(mp);
fmp = mp;
mp = mp->next;
erts_free_message(fmp);
}
}
ErtsMessage *
erts_realloc_shrink_message(ErtsMessage *mp, Uint sz, Eterm *brefs, Uint brefs_size)
{
ErtsMessage *nmp = erts_realloc(ERTS_ALC_T_MSG, mp,
sizeof(ErtsMessage) + (sz - 1)*sizeof(Eterm));
if (nmp != mp) {
Eterm *sp = &mp->hfrag.mem[0];
Eterm *ep = sp + sz;
Sint offs = &nmp->hfrag.mem[0] - sp;
erts_offset_off_heap(&nmp->hfrag.off_heap, offs, sp, ep);
erts_offset_heap(&nmp->hfrag.mem[0], sz, offs, sp, ep);
if (brefs && brefs_size)
erts_offset_heap_ptr(brefs, brefs_size, offs, sp, ep);
}
nmp->hfrag.used_size = sz;
nmp->hfrag.alloc_size = sz;
return nmp;
}
void
erts_queue_dist_message(Process *rcvr,
ErtsProcLocks rcvr_locks,
ErtsDistExternal *dist_ext,
ErlHeapFragment *hfrag,
Eterm token,
Eterm from)
{
ErtsMessage* mp;
erts_aint_t state;
ERTS_LC_ASSERT(rcvr_locks == erts_proc_lc_my_proc_locks(rcvr));
if (hfrag) {
/* Fragmented message, allocate a message reference */
mp = erts_alloc_message(0, NULL);
mp->data.heap_frag = hfrag;
} else {
/* Un-fragmented message, allocate space for
token and dist_ext in message. */
Uint dist_ext_sz = erts_dist_ext_size(dist_ext) / sizeof(Eterm);
Uint token_sz = size_object(token);
Uint sz = token_sz + dist_ext_sz;
Eterm *hp;
mp = erts_alloc_message(sz, &hp);
mp->data.heap_frag = &mp->hfrag;
mp->hfrag.used_size = token_sz;
erts_make_dist_ext_copy(dist_ext, erts_get_dist_ext(mp->data.heap_frag));
token = copy_struct(token, token_sz, &hp, &mp->data.heap_frag->off_heap);
}
ERL_MESSAGE_FROM(mp) = dist_ext->dep->sysname;
ERL_MESSAGE_TERM(mp) = THE_NON_VALUE;
#ifdef USE_VM_PROBES
ERL_MESSAGE_DT_UTAG(mp) = NIL;
if (token == am_have_dt_utag)
ERL_MESSAGE_TOKEN(mp) = NIL;
else
#endif
ERL_MESSAGE_TOKEN(mp) = token;
if (!(rcvr_locks & ERTS_PROC_LOCK_MSGQ)) {
if (erts_proc_trylock(rcvr, ERTS_PROC_LOCK_MSGQ) == EBUSY) {
ErtsProcLocks need_locks = ERTS_PROC_LOCK_MSGQ;
ErtsProcLocks unlocks =
rcvr_locks & ERTS_PROC_LOCKS_HIGHER_THAN(ERTS_PROC_LOCK_MSGQ);
if (unlocks) {
erts_proc_unlock(rcvr, unlocks);
need_locks |= unlocks;
}
erts_proc_lock(rcvr, need_locks);
}
}
state = erts_atomic32_read_acqb(&rcvr->state);
if (state & ERTS_PSFLG_EXITING) {
if (!(rcvr_locks & ERTS_PROC_LOCK_MSGQ))
erts_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ);
/* Drop message if receiver is exiting or has a pending exit ... */
erts_cleanup_messages(mp);
}
else {
LINK_MESSAGE(rcvr, mp);
if (rcvr_locks & ERTS_PROC_LOCK_MAIN)
erts_proc_sig_fetch(rcvr);
if (!(rcvr_locks & ERTS_PROC_LOCK_MSGQ))
erts_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ);
erts_proc_notify_new_message(rcvr, rcvr_locks);
}
}
/* Add messages last in message queue */
static void
queue_messages(Process* receiver,
ErtsProcLocks receiver_locks,
ErtsMessage* first,
ErtsMessage** last,
Uint len)
{
int locked_msgq = 0;
erts_aint32_t state;
#ifdef DEBUG
{
ErtsMessage* fmsg = ERTS_SIG_IS_MSG(first) ? first : first->next;
ASSERT(fmsg);
ASSERT(is_value(ERL_MESSAGE_TERM(fmsg)));
ASSERT(is_value(ERL_MESSAGE_FROM(fmsg)));
ASSERT(ERL_MESSAGE_TOKEN(fmsg) == am_undefined ||
ERL_MESSAGE_TOKEN(fmsg) == NIL ||
is_tuple(ERL_MESSAGE_TOKEN(fmsg)));
}
#endif
ERTS_LC_ASSERT((erts_proc_lc_my_proc_locks(receiver) & ERTS_PROC_LOCK_MSGQ)
== (receiver_locks & ERTS_PROC_LOCK_MSGQ));
if (!(receiver_locks & ERTS_PROC_LOCK_MSGQ)) {
erts_proc_lock(receiver, ERTS_PROC_LOCK_MSGQ);
locked_msgq = 1;
}
state = erts_atomic32_read_nob(&receiver->state);
if (state & ERTS_PSFLG_EXITING) {
/* Drop message if receiver is exiting or has a pending exit... */
if (locked_msgq)
erts_proc_unlock(receiver, ERTS_PROC_LOCK_MSGQ);
if (ERTS_SIG_IS_NON_MSG(first)) {
ErtsSchedulerData* esdp = erts_get_scheduler_data();
ASSERT(esdp);
ASSERT(!esdp->pending_signal.sig);
esdp->pending_signal.sig = (ErtsSignal*) first;
esdp->pending_signal.to = receiver->common.id;
first = first->next;
}
erts_cleanup_messages(first);
return;
}
if (last == &first->next) {
ASSERT(len == 1);
LINK_MESSAGE(receiver, first);
}
else {
erts_enqueue_signals(receiver, first, last, NULL, len, state);
}
if (receiver_locks & ERTS_PROC_LOCK_MAIN)
erts_proc_sig_fetch(receiver);
if (locked_msgq) {
erts_proc_unlock(receiver, ERTS_PROC_LOCK_MSGQ);
}
if (last == &first->next)
erts_proc_notify_new_message(receiver, receiver_locks);
else
erts_proc_notify_new_sig(receiver, state, ERTS_PSFLG_ACTIVE);
}
static ERTS_INLINE
ErtsMessage* prepend_pending_sig_maybe(Process* sender, Process* receiver,
ErtsMessage* mp)
{
ErtsSchedulerData* esdp = sender->scheduler_data;
ErtsSignal* pend_sig;
if (!esdp || esdp->pending_signal.to != receiver->common.id)
return mp;
pend_sig = esdp->pending_signal.sig;
ASSERT(esdp->pending_signal.dbg_from == sender);
esdp->pending_signal.sig = NULL;
esdp->pending_signal.to = THE_NON_VALUE;
pend_sig->common.next = mp;
pend_sig->common.specific.next = NULL;
return (ErtsMessage*) pend_sig;
}
/**
*
* @brief Send one message from *NOT* a local process.
*
* seq_trace does not work with this type of messages
* to it is set to am_undefined which means that the
* receiving process will not remove the seq_trace token
* when it gets this message.
*
*/
void
erts_queue_message(Process* receiver, ErtsProcLocks receiver_locks,
ErtsMessage* mp, Eterm msg, Eterm from)
{
ASSERT(is_not_internal_pid(from));
ERL_MESSAGE_TERM(mp) = msg;
ERL_MESSAGE_FROM(mp) = from;
ERL_MESSAGE_TOKEN(mp) = am_undefined;
queue_messages(receiver, receiver_locks, mp, &mp->next, 1);
}
/**
* @brief Send one message from a local process.
*
* It is up to the caller of this function to set the
* correct seq_trace. The general rule of thumb is that
* it should be set to am_undefined if the message
* cannot be traced using seq_trace, if it can be
* traced it should be set to the trace token. It should
* very rarely be explicitly set to NIL!
*/
void
erts_queue_proc_message(Process* sender,
Process* receiver, ErtsProcLocks receiver_locks,
ErtsMessage* mp, Eterm msg)
{
ERL_MESSAGE_TERM(mp) = msg;
ERL_MESSAGE_FROM(mp) = sender->common.id;
queue_messages(receiver, receiver_locks,
prepend_pending_sig_maybe(sender, receiver, mp),
&mp->next, 1);
}
void
erts_queue_proc_messages(Process* sender,
Process* receiver, ErtsProcLocks receiver_locks,
ErtsMessage* first, ErtsMessage** last, Uint len)
{
queue_messages(receiver, receiver_locks,
prepend_pending_sig_maybe(sender, receiver, first),
last, len);
}
void
erts_link_mbuf_to_proc(Process *proc, ErlHeapFragment *first_bp)
{
if (first_bp) {
ErlHeapFragment *bp = first_bp;
while (1) {
/* Move any off_heap's into the process */
if (bp->off_heap.first != NULL) {
struct erl_off_heap_header** next_p = &bp->off_heap.first;
while (*next_p != NULL) {
next_p = &((*next_p)->next);
}
*next_p = MSO(proc).first;
MSO(proc).first = bp->off_heap.first;
bp->off_heap.first = NULL;
OH_OVERHEAD(&(MSO(proc)), bp->off_heap.overhead);
}
MBUF_SIZE(proc) += bp->used_size;
if (!bp->next)
break;
bp = bp->next;
}
/* Link the message buffer */
bp->next = MBUF(proc);
MBUF(proc) = first_bp;
}
}
Uint
erts_msg_attached_data_size_aux(ErtsMessage *msg)
{
Sint sz;
ErtsDistExternal *edep = erts_get_dist_ext(msg->data.heap_frag);
ASSERT(ERTS_SIG_IS_EXTERNAL_MSG(msg));
if (edep->heap_size < 0) {
sz = erts_decode_dist_ext_size(edep, 1);
if (sz < 0) {
/* Bad external
* We leave the message intact in this case as it's not worth the trouble
* to make all callers remove it from queue. It will be detected again
* and removed from message queue later anyway.
*/
return 0;
}
edep->heap_size = sz;
} else {
sz = edep->heap_size;
}
if (is_not_nil(ERL_MESSAGE_TOKEN(msg))) {
sz += msg->data.heap_frag->used_size;
}
return sz;
}
ErtsMessage *
erts_try_alloc_message_on_heap(Process *pp,
erts_aint32_t *psp,
ErtsProcLocks *plp,
Uint sz,
Eterm **hpp,
ErlOffHeap **ohpp,
int *on_heap_p)
{
int locked_main = 0;
ErtsMessage *mp;
ASSERT(!(*psp & ERTS_PSFLG_OFF_HEAP_MSGQ));
if ((*psp) & ERTS_PSFLGS_VOLATILE_HEAP)
goto in_message_fragment;
else if (*plp & ERTS_PROC_LOCK_MAIN) {
try_on_heap:
if (((*psp) & ERTS_PSFLGS_VOLATILE_HEAP)
|| (pp->flags & F_DISABLE_GC)
|| HEAP_LIMIT(pp) - HEAP_TOP(pp) <= sz) {
/*
* The heap is either potentially in an inconsistent
* state, or not large enough.
*/
if (locked_main) {
*plp &= ~ERTS_PROC_LOCK_MAIN;
erts_proc_unlock(pp, ERTS_PROC_LOCK_MAIN);
}
goto in_message_fragment;
}
*hpp = HEAP_TOP(pp);
HEAP_TOP(pp) = *hpp + sz;
*ohpp = &MSO(pp);
mp = erts_alloc_message(0, NULL);
mp->data.attached = NULL;
*on_heap_p = !0;
}
else if (pp && erts_proc_trylock(pp, ERTS_PROC_LOCK_MAIN) == 0) {
locked_main = 1;
*psp = erts_atomic32_read_nob(&pp->state);
*plp |= ERTS_PROC_LOCK_MAIN;
goto try_on_heap;
}
else {
in_message_fragment:
if ((*psp) & ERTS_PSFLG_OFF_HEAP_MSGQ) {
mp = erts_alloc_message(sz, hpp);
*ohpp = sz == 0 ? NULL : &mp->hfrag.off_heap;
}
else {
mp = erts_alloc_message(0, NULL);
if (!sz) {
*hpp = NULL;
*ohpp = NULL;
}
else {
ErlHeapFragment *bp;
bp = new_message_buffer(sz);
*hpp = &bp->mem[0];
mp->data.heap_frag = bp;
*ohpp = &bp->off_heap;
}
}
*on_heap_p = 0;
}
return mp;
}
/*
* Send a local message when sender & receiver processes are known.
*/
void
erts_send_message(Process* sender,
Process* receiver,
ErtsProcLocks *receiver_locks,
Eterm message)
{
Uint msize;
ErtsMessage* mp;
ErlOffHeap *ohp;
Eterm token = NIL;
#ifdef USE_VM_PROBES
DTRACE_CHARBUF(sender_name, 64);
DTRACE_CHARBUF(receiver_name, 64);
Sint tok_label = 0;
Sint tok_lastcnt = 0;
Sint tok_serial = 0;
Eterm utag = NIL;
#endif
erts_aint32_t receiver_state;
#ifdef SHCOPY_SEND
erts_shcopy_t info;
#else
erts_literal_area_t litarea;
INITIALIZE_LITERAL_PURGE_AREA(litarea);
#endif
#ifdef USE_VM_PROBES
*sender_name = *receiver_name = '\0';
if (DTRACE_ENABLED(message_send)) {
erts_snprintf(sender_name, sizeof(DTRACE_CHARBUF_NAME(sender_name)),
"%T", sender->common.id);
erts_snprintf(receiver_name, sizeof(DTRACE_CHARBUF_NAME(receiver_name)),
"%T", receiver->common.id);
}
#endif
receiver_state = erts_atomic32_read_nob(&receiver->state);
if (SEQ_TRACE_TOKEN(sender) != NIL) {
Eterm* hp;
Eterm stoken = SEQ_TRACE_TOKEN(sender);
Uint seq_trace_size = 0;
#ifdef USE_VM_PROBES
Uint dt_utag_size = 0;
#endif
/* SHCOPY corrupts the heap between
* copy_shared_calculate, and
* copy_shared_perform. (it inserts move_markers like the gc).
* Make sure we don't use the heap between those instances.
*/
if (have_seqtrace(stoken)) {
seq_trace_update_serial(sender);
seq_trace_output(stoken, message, SEQ_TRACE_SEND,
receiver->common.id, sender);
seq_trace_size = size_object(stoken);
}
#ifdef USE_VM_PROBES
if (DT_UTAG_FLAGS(sender) & DT_UTAG_SPREADING) {
dt_utag_size = size_object(DT_UTAG(sender));
} else if (stoken == am_have_dt_utag ) {
stoken = NIL;
}
#endif
#ifdef SHCOPY_SEND
INITIALIZE_SHCOPY(info);
msize = copy_shared_calculate(message, &info);
#else
msize = size_object_litopt(message, &litarea);
#endif
mp = erts_alloc_message_heap_state(receiver,
&receiver_state,
receiver_locks,
(msize
#ifdef USE_VM_PROBES
+ dt_utag_size
#endif
+ seq_trace_size),
&hp,
&ohp);
#ifdef SHCOPY_SEND
if (is_not_immed(message))
message = copy_shared_perform(message, msize, &info, &hp, ohp);
DESTROY_SHCOPY(info);
#else
if (is_not_immed(message))
message = copy_struct_litopt(message, msize, &hp, ohp, &litarea);
#endif
if (is_immed(stoken))
token = stoken;
else
token = copy_struct(stoken, seq_trace_size, &hp, ohp);
#ifdef USE_VM_PROBES
if (DT_UTAG_FLAGS(sender) & DT_UTAG_SPREADING) {
if (is_immed(DT_UTAG(sender)))
utag = DT_UTAG(sender);
else
utag = copy_struct(DT_UTAG(sender), dt_utag_size, &hp, ohp);
}
if (DTRACE_ENABLED(message_send)) {
if (have_seqtrace(stoken)) {
tok_label = SEQ_TRACE_T_DTRACE_LABEL(stoken);
tok_lastcnt = signed_val(SEQ_TRACE_T_LASTCNT(stoken));
tok_serial = signed_val(SEQ_TRACE_T_SERIAL(stoken));
}
DTRACE6(message_send, sender_name, receiver_name,
msize, tok_label, tok_lastcnt, tok_serial);
}
#endif
} else {
Eterm *hp;
if (receiver == sender && !(receiver_state & ERTS_PSFLG_OFF_HEAP_MSGQ)) {
mp = erts_alloc_message(0, NULL);
msize = 0;
}
else {
#ifdef SHCOPY_SEND
INITIALIZE_SHCOPY(info);
msize = copy_shared_calculate(message, &info);
#else
msize = size_object_litopt(message, &litarea);
#endif
mp = erts_alloc_message_heap_state(receiver,
&receiver_state,
receiver_locks,
msize,
&hp,
&ohp);
#ifdef SHCOPY_SEND
if (is_not_immed(message))
message = copy_shared_perform(message, msize, &info, &hp, ohp);
DESTROY_SHCOPY(info);
#else
if (is_not_immed(message))
message = copy_struct_litopt(message, msize, &hp, ohp, &litarea);
#endif
}
#ifdef USE_VM_PROBES
DTRACE6(message_send, sender_name, receiver_name,
msize, tok_label, tok_lastcnt, tok_serial);
#endif
}
ERL_MESSAGE_TOKEN(mp) = token;
#ifdef USE_VM_PROBES
ERL_MESSAGE_DT_UTAG(mp) = utag;
#endif
erts_queue_proc_message(sender, receiver, *receiver_locks, mp, message);
if (msize > ERTS_MSG_COPY_WORDS_PER_REDUCTION) {
Uint reds = msize / ERTS_MSG_COPY_WORDS_PER_REDUCTION;
if (reds > CONTEXT_REDS)
reds = CONTEXT_REDS;
BUMP_REDS(sender, (int) reds);
}
}
/*
* This function delivers an EXIT message to a process
* which is trapping EXITs.
*/
void
erts_deliver_exit_message(Eterm from, Process *to, ErtsProcLocks *to_locksp,
Eterm reason, Eterm token)
{
Eterm mess;
Eterm save;
Eterm from_copy;
Uint sz_reason;
Uint sz_token;
Uint sz_from;
Eterm* hp;
Eterm temptoken;
ErtsMessage* mp;
ErlOffHeap *ohp;
#ifdef SHCOPY_SEND
erts_shcopy_t info;
#endif
if (have_seqtrace(token)) {
ASSERT(is_tuple(token));
sz_token = size_object(token);
sz_from = size_object(from);
#ifdef SHCOPY_SEND
INITIALIZE_SHCOPY(info);
sz_reason = copy_shared_calculate(reason, &info);
#else
sz_reason = size_object(reason);
#endif
mp = erts_alloc_message_heap(to, to_locksp,
sz_reason + sz_from + sz_token + 4,
&hp, &ohp);
#ifdef SHCOPY_SEND
mess = copy_shared_perform(reason, sz_reason, &info, &hp, ohp);
DESTROY_SHCOPY(info);
#else
mess = copy_struct(reason, sz_reason, &hp, ohp);
#endif
from_copy = copy_struct(from, sz_from, &hp, ohp);
save = TUPLE3(hp, am_EXIT, from_copy, mess);
hp += 4;
/* the trace token must in this case be updated by the caller */
seq_trace_output(token, save, SEQ_TRACE_SEND, to->common.id, NULL);
temptoken = copy_struct(token, sz_token, &hp, ohp);
ERL_MESSAGE_TOKEN(mp) = temptoken;
erts_queue_message(to, *to_locksp, mp, save, am_system);
} else {
sz_from = IS_CONST(from) ? 0 : size_object(from);
#ifdef SHCOPY_SEND
INITIALIZE_SHCOPY(info);
sz_reason = copy_shared_calculate(reason, &info);
#else
sz_reason = size_object(reason);
#endif
mp = erts_alloc_message_heap(to, to_locksp,
sz_reason+sz_from+4, &hp, &ohp);
#ifdef SHCOPY_SEND
mess = copy_shared_perform(reason, sz_reason, &info, &hp, ohp);
DESTROY_SHCOPY(info);
#else
mess = copy_struct(reason, sz_reason, &hp, ohp);
#endif
from_copy = (IS_CONST(from)
? from
: copy_struct(from, sz_from, &hp, ohp));
save = TUPLE3(hp, am_EXIT, from_copy, mess);
erts_queue_message(to, *to_locksp, mp, save, am_system);
}
}
void erts_save_message_in_proc(Process *p, ErtsMessage *msgp)
{
ErlHeapFragment *hfp;
if (msgp->data.attached == ERTS_MSG_COMBINED_HFRAG)
hfp = &msgp->hfrag;
else if (msgp->data.attached) {
hfp = msgp->data.heap_frag;
}
else {
erts_free_message(msgp);
return; /* Nothing to save */
}
while (1) {
struct erl_off_heap_header *ohhp = hfp->off_heap.first;
if (ohhp) {
for ( ; ohhp->next; ohhp = ohhp->next)
;
ohhp->next = p->off_heap.first;
p->off_heap.first = hfp->off_heap.first;
hfp->off_heap.first = NULL;
}
p->off_heap.overhead += hfp->off_heap.overhead;
hfp->off_heap.overhead = 0;
p->mbuf_sz += hfp->used_size;
if (!hfp->next)
break;
hfp = hfp->next;
}
msgp->next = p->msg_frag;
p->msg_frag = msgp;
}
Sint
erts_move_messages_off_heap(Process *c_p)
{
int reds = 1;
int i;
ErtsMessage *msgq[] = {c_p->sig_qs.first, c_p->sig_qs.cont};
/*
* Move all messages off heap. This *only* occurs when the
* process had off heap message disabled and just enabled
* it...
*/
reds += erts_proc_sig_privqs_len(c_p) / 10;
ASSERT(erts_atomic32_read_nob(&c_p->state)
& ERTS_PSFLG_OFF_HEAP_MSGQ);
ASSERT(c_p->flags & F_OFF_HEAP_MSGQ_CHNG);
for (i = 0; i < sizeof(msgq)/sizeof(msgq[0]); i++) {
ErtsMessage *mp;
for (mp = msgq[i]; mp; mp = mp->next) {
Uint msg_sz, token_sz;
#ifdef USE_VM_PROBES
Uint utag_sz;
#endif
Eterm *hp;
ErlHeapFragment *hfrag;
if (!ERTS_SIG_IS_INTERNAL_MSG(mp))
continue;
if (mp->data.attached)
continue;
if (is_immed(ERL_MESSAGE_TERM(mp))
#ifdef USE_VM_PROBES
&& is_immed(ERL_MESSAGE_DT_UTAG(mp))
#endif
&& is_not_immed(ERL_MESSAGE_TOKEN(mp)))
continue;
/*
* The message refers into the heap. Copy the message
* from the heap into a heap fragment and attach
* it to the message...
*/
msg_sz = size_object(ERL_MESSAGE_TERM(mp));
#ifdef USE_VM_PROBES
utag_sz = size_object(ERL_MESSAGE_DT_UTAG(mp));
#endif
token_sz = size_object(ERL_MESSAGE_TOKEN(mp));
hfrag = new_message_buffer(msg_sz
#ifdef USE_VM_PROBES
+ utag_sz
#endif
+ token_sz);
hp = hfrag->mem;
if (is_not_immed(ERL_MESSAGE_TERM(mp)))
ERL_MESSAGE_TERM(mp) = copy_struct(ERL_MESSAGE_TERM(mp),
msg_sz, &hp,
&hfrag->off_heap);
if (is_not_immed(ERL_MESSAGE_TOKEN(mp)))
ERL_MESSAGE_TOKEN(mp) = copy_struct(ERL_MESSAGE_TOKEN(mp),
token_sz, &hp,
&hfrag->off_heap);
#ifdef USE_VM_PROBES
if (is_not_immed(ERL_MESSAGE_DT_UTAG(mp)))
ERL_MESSAGE_DT_UTAG(mp) = copy_struct(ERL_MESSAGE_DT_UTAG(mp),
utag_sz, &hp,
&hfrag->off_heap);
#endif
mp->data.heap_frag = hfrag;
reds += 1;
}
}
return reds;
}
Sint
erts_complete_off_heap_message_queue_change(Process *c_p)
{
int reds = 1;
ERTS_LC_ASSERT(ERTS_PROC_LOCK_MAIN == erts_proc_lc_my_proc_locks(c_p));
ASSERT(c_p->flags & F_OFF_HEAP_MSGQ_CHNG);
ASSERT(erts_atomic32_read_nob(&c_p->state) & ERTS_PSFLG_OFF_HEAP_MSGQ);
/*
* This job was first initiated when the process changed to off heap
* message queue management. Since then ERTS_PSFLG_OFF_HEAP_MSGQ
* has been set. However, the management state might have been changed
* again (multiple times) since then. Check users last requested state
* (the flags F_OFF_HEAP_MSGQ, and F_ON_HEAP_MSGQ), and make the state
* consistent with that.
*/
if (!(c_p->flags & F_OFF_HEAP_MSGQ))
erts_atomic32_read_band_nob(&c_p->state,
~ERTS_PSFLG_OFF_HEAP_MSGQ);
else {
reds += 2;
erts_proc_lock(c_p, ERTS_PROC_LOCK_MSGQ);
erts_proc_sig_fetch(c_p);
erts_proc_unlock(c_p, ERTS_PROC_LOCK_MSGQ);
reds += erts_move_messages_off_heap(c_p);
}
c_p->flags &= ~F_OFF_HEAP_MSGQ_CHNG;
return reds;
}
typedef struct {
Eterm pid;
ErtsThrPrgrLaterOp lop;
} ErtsChangeOffHeapMessageQueue;
static void
change_off_heap_msgq(void *vcohmq)
{
ErtsChangeOffHeapMessageQueue *cohmq;
/*
* Now we've waited thread progress which ensures that all
* messages to the process are enqueued off heap. Schedule
* completion of this change as a system task on the process
* itself. This in order to avoid lock contention on its
* main lock. We will be called in
* erts_complete_off_heap_message_queue_change() (above) when
* the system task has been selected for execution.
*/
cohmq = (ErtsChangeOffHeapMessageQueue *) vcohmq;
erts_schedule_complete_off_heap_message_queue_change(cohmq->pid);
erts_free(ERTS_ALC_T_MSGQ_CHNG, vcohmq);
}
Eterm
erts_change_message_queue_management(Process *c_p, Eterm new_state)
{
Eterm res;
#ifdef DEBUG
if (c_p->flags & F_OFF_HEAP_MSGQ) {
ASSERT(erts_atomic32_read_nob(&c_p->state)
& ERTS_PSFLG_OFF_HEAP_MSGQ);
}
else {
if (c_p->flags & F_OFF_HEAP_MSGQ_CHNG) {
ASSERT(erts_atomic32_read_nob(&c_p->state)
& ERTS_PSFLG_OFF_HEAP_MSGQ);
}
else {
ASSERT(!(erts_atomic32_read_nob(&c_p->state)
& ERTS_PSFLG_OFF_HEAP_MSGQ));
}
}
#endif
switch (c_p->flags & (F_OFF_HEAP_MSGQ|F_ON_HEAP_MSGQ)) {
case F_OFF_HEAP_MSGQ:
res = am_off_heap;
switch (new_state) {
case am_off_heap:
break;
case am_on_heap:
c_p->flags |= F_ON_HEAP_MSGQ;
c_p->flags &= ~F_OFF_HEAP_MSGQ;
/*
* We are not allowed to clear ERTS_PSFLG_OFF_HEAP_MSGQ
* if a off heap change is ongoing. It will be adjusted
* when the change completes...
*/
if (!(c_p->flags & F_OFF_HEAP_MSGQ_CHNG)) {
/* Safe to clear ERTS_PSFLG_OFF_HEAP_MSGQ... */
erts_atomic32_read_band_nob(&c_p->state,
~ERTS_PSFLG_OFF_HEAP_MSGQ);
}
break;
default:
res = THE_NON_VALUE; /* badarg */
break;
}
break;
case F_ON_HEAP_MSGQ:
res = am_on_heap;
switch (new_state) {
case am_on_heap:
break;
case am_off_heap:
c_p->flags &= ~F_ON_HEAP_MSGQ;
goto change_to_off_heap;
default:
res = THE_NON_VALUE; /* badarg */
break;
}
break;
default:
res = am_error;
ERTS_INTERNAL_ERROR("Inconsistent message queue management state");
break;
}
return res;
change_to_off_heap:
c_p->flags |= F_OFF_HEAP_MSGQ;
/*
* We do not have to schedule a change if
* we have an ongoing off heap change...
*/
if (!(c_p->flags & F_OFF_HEAP_MSGQ_CHNG)) {
ErtsChangeOffHeapMessageQueue *cohmq;
/*
* Need to set ERTS_PSFLG_OFF_HEAP_MSGQ and wait
* thread progress before completing the change in
* order to ensure that all senders observe that
* messages should be passed off heap. When the
* change has completed, GC does not need to inspect
* the message queue at all.
*/
erts_atomic32_read_bor_nob(&c_p->state,
ERTS_PSFLG_OFF_HEAP_MSGQ);
c_p->flags |= F_OFF_HEAP_MSGQ_CHNG;
cohmq = erts_alloc(ERTS_ALC_T_MSGQ_CHNG,
sizeof(ErtsChangeOffHeapMessageQueue));
cohmq->pid = c_p->common.id;
erts_schedule_thr_prgr_later_op(change_off_heap_msgq,
(void *) cohmq,
&cohmq->lop);
}
return res;
}
void erts_factory_proc_init(ErtsHeapFactory* factory,
Process* p)
{
erts_factory_proc_prealloc_init(factory, p, HEAP_LIMIT(p) - HEAP_TOP(p));
}
void erts_factory_proc_prealloc_init(ErtsHeapFactory* factory,
Process* p,
Sint size)
{
ErlHeapFragment *bp = p->mbuf;
factory->mode = FACTORY_HALLOC;
factory->p = p;
factory->hp_start = HAlloc(p, size);
factory->hp = factory->hp_start;
factory->hp_end = factory->hp_start + size;
factory->off_heap = &p->off_heap;
factory->message = NULL;
factory->off_heap_saved.first = p->off_heap.first;
factory->off_heap_saved.overhead = p->off_heap.overhead;
factory->heap_frags_saved = bp;
factory->heap_frags_saved_used = bp ? bp->used_size : 0;
factory->heap_frags = NULL; /* not used */
factory->alloc_type = 0; /* not used */
}
void erts_factory_heap_frag_init(ErtsHeapFactory* factory,
ErlHeapFragment* bp)
{
factory->mode = FACTORY_HEAP_FRAGS;
factory->p = NULL;
factory->hp_start = bp->mem;
factory->hp = bp->mem;
factory->hp_end = bp->mem + bp->alloc_size;
factory->off_heap = &bp->off_heap;
factory->message = NULL;
factory->heap_frags = bp;
factory->heap_frags_saved = NULL;
factory->heap_frags_saved_used = 0;
factory->alloc_type = ERTS_ALC_T_HEAP_FRAG;
ASSERT(!bp->next);
factory->off_heap_saved.first = factory->off_heap->first;
factory->off_heap_saved.overhead = factory->off_heap->overhead;
ASSERT(factory->hp >= factory->hp_start && factory->hp <= factory->hp_end);
}
ErtsMessage *
erts_factory_message_create(ErtsHeapFactory* factory,
Process *proc,
ErtsProcLocks *proc_locksp,
Uint sz)
{
Eterm *hp;
ErlOffHeap *ohp;
ErtsMessage *msgp;
int on_heap;
erts_aint32_t state;
state = proc ? erts_atomic32_read_nob(&proc->state) : ERTS_PSFLG_OFF_HEAP_MSGQ;
if (state & ERTS_PSFLG_OFF_HEAP_MSGQ) {
msgp = erts_alloc_message(sz, &hp);
ohp = sz == 0 ? NULL : &msgp->hfrag.off_heap;
on_heap = 0;
}
else {
msgp = erts_try_alloc_message_on_heap(proc, &state,
proc_locksp,
sz, &hp, &ohp,
&on_heap);
}
if (on_heap) {
ERTS_ASSERT(*proc_locksp & ERTS_PROC_LOCK_MAIN);
ASSERT(ohp == &proc->off_heap);
factory->mode = FACTORY_HALLOC;
factory->p = proc;
factory->heap_frags_saved = proc->mbuf;
factory->heap_frags_saved_used = proc->mbuf ? proc->mbuf->used_size : 0;
}
else {
factory->mode = FACTORY_MESSAGE;
factory->p = NULL;
factory->heap_frags_saved = NULL;
factory->heap_frags_saved_used = 0;
if (msgp->data.attached == ERTS_MSG_COMBINED_HFRAG) {
ASSERT(!msgp->hfrag.next);
factory->heap_frags = NULL;
}
else {
ASSERT(!msgp->data.heap_frag
|| !msgp->data.heap_frag->next);
factory->heap_frags = msgp->data.heap_frag;
}
}
factory->hp_start = hp;
factory->hp = hp;
factory->hp_end = hp + sz;
factory->message = msgp;
factory->off_heap = ohp;
factory->alloc_type = ERTS_ALC_T_HEAP_FRAG;
if (ohp) {
factory->off_heap_saved.first = ohp->first;
factory->off_heap_saved.overhead = ohp->overhead;
}
else {
factory->off_heap_saved.first = NULL;
factory->off_heap_saved.overhead = 0;
}
ASSERT(factory->hp >= factory->hp_start && factory->hp <= factory->hp_end);
return msgp;
}
void erts_factory_selfcontained_message_init(ErtsHeapFactory* factory,
ErtsMessage *msgp,
Eterm *hp)
{
ErlHeapFragment* bp;
if (msgp->data.attached == ERTS_MSG_COMBINED_HFRAG) {
bp = &msgp->hfrag;
factory->heap_frags = NULL;
}
else {
bp = msgp->data.heap_frag;
factory->heap_frags = bp;
}
factory->mode = FACTORY_MESSAGE;
factory->p = NULL;
factory->hp_start = bp->mem;
factory->hp = hp;
factory->hp_end = bp->mem + bp->alloc_size;
factory->message = msgp;
factory->off_heap = &bp->off_heap;
factory->heap_frags_saved = NULL;
factory->heap_frags_saved_used = 0;
factory->alloc_type = ERTS_ALC_T_HEAP_FRAG;
ASSERT(!bp->next);
factory->off_heap_saved.first = factory->off_heap->first;
factory->off_heap_saved.overhead = factory->off_heap->overhead;
ASSERT(factory->hp >= factory->hp_start && factory->hp <= factory->hp_end);
}
/* One static sized heap that must suffice.
No extra heap fragments will be allocated.
*/
void erts_factory_static_init(ErtsHeapFactory* factory,
Eterm* hp,
Uint size,
ErlOffHeap* off_heap)
{
factory->mode = FACTORY_STATIC;
factory->hp_start = hp;
factory->hp = hp;
factory->hp_end = hp + size;
factory->off_heap = off_heap;
factory->off_heap_saved.first = factory->off_heap->first;
factory->off_heap_saved.overhead = factory->off_heap->overhead;
}
/* A temporary heap with default buffer allocated/freed by client.
* factory_close is same as factory_undo
*/
void erts_factory_tmp_init(ErtsHeapFactory* factory, Eterm* hp, Uint size,
Uint32 atype)
{
factory->mode = FACTORY_TMP;
factory->hp_start = hp;
factory->hp = hp;
factory->hp_end = hp + size;
factory->heap_frags = NULL;
factory->off_heap_saved.first = NULL;
factory->off_heap_saved.overhead = 0;
factory->off_heap = &factory->off_heap_saved;
factory->alloc_type = atype;
}
/* When we know the term is an immediate and need no heap.
*/
void erts_factory_dummy_init(ErtsHeapFactory* factory)
{
factory->mode = FACTORY_CLOSED;
}
Eterm* erts_reserve_heap(ErtsHeapFactory* factory, Uint need)
{
ASSERT((unsigned int)factory->mode > (unsigned int)FACTORY_CLOSED);
if (factory->hp + need > factory->hp_end) {
erts_reserve_heap__(factory, need, 200);
}
return factory->hp;
}
void erts_reserve_heap__(ErtsHeapFactory* factory, Uint need, Uint xtra)
{
/* internal... */
ErlHeapFragment* bp;
switch (factory->mode) {
case FACTORY_HALLOC:
HRelease(factory->p, factory->hp_end, factory->hp);
factory->hp = HAllocX(factory->p, need, xtra);
factory->hp_end = factory->hp + need;
return;
case FACTORY_MESSAGE: {
int replace_oh;
int replace_msg_hfrag;
if (!factory->heap_frags) {
ASSERT(factory->message->data.attached == ERTS_MSG_COMBINED_HFRAG);
bp = &factory->message->hfrag;
}
else {
/* Fall through */
case FACTORY_HEAP_FRAGS:
case FACTORY_TMP:
bp = factory->heap_frags;
}
replace_oh = 0;
replace_msg_hfrag = 0;
if (bp) {
ASSERT(factory->hp >= bp->mem);
ASSERT(factory->hp <= factory->hp_end);
ASSERT(factory->hp_end == bp->mem + bp->alloc_size);
bp->used_size = factory->hp - bp->mem;
if (!bp->used_size && factory->heap_frags) {
factory->heap_frags = bp->next;
bp->next = NULL;
ASSERT(!bp->off_heap.first);
if (factory->off_heap == &bp->off_heap)
replace_oh = !0;
if (factory->message && factory->message->data.heap_frag == bp)
replace_msg_hfrag = !0;
free_message_buffer(bp);
}
}
bp = (ErlHeapFragment*) ERTS_HEAP_ALLOC(factory->alloc_type,
ERTS_HEAP_FRAG_SIZE(need+xtra));
bp->next = factory->heap_frags;
factory->heap_frags = bp;
bp->alloc_size = need + xtra;
bp->used_size = need + xtra;
bp->off_heap.first = NULL;
bp->off_heap.overhead = 0;
if (replace_oh) {
factory->off_heap = &bp->off_heap;
factory->off_heap_saved.first = factory->off_heap->first;
factory->off_heap_saved.overhead = factory->off_heap->overhead;
}
if (replace_msg_hfrag)
factory->message->data.heap_frag = bp;
factory->hp = bp->mem;
factory->hp_end = bp->mem + bp->alloc_size;
return;
}
case FACTORY_STATIC:
case FACTORY_CLOSED:
default:
ASSERT(!"Invalid factory mode");
}
}
void erts_factory_close(ErtsHeapFactory* factory)
{
ErlHeapFragment* bp;
switch (factory->mode) {
case FACTORY_HALLOC:
HRelease(factory->p, factory->hp_end, factory->hp);
break;
case FACTORY_MESSAGE:
if (!factory->heap_frags) {
if (factory->message->data.attached == ERTS_MSG_COMBINED_HFRAG)
bp = &factory->message->hfrag;
else
bp = NULL;
}
else {
if (factory->message->data.attached == ERTS_MSG_COMBINED_HFRAG)
factory->message->hfrag.next = factory->heap_frags;
else
factory->message->data.heap_frag = factory->heap_frags;
/* Fall through */
case FACTORY_HEAP_FRAGS:
bp = factory->heap_frags;
}
if (bp) {
ASSERT(factory->hp >= bp->mem);
ASSERT(factory->hp <= factory->hp_end);
ASSERT(factory->hp_end == bp->mem + bp->alloc_size);
bp->used_size = factory->hp - bp->mem;
}
break;
case FACTORY_TMP:
erts_factory_undo(factory);
break;
case FACTORY_STATIC: break;
case FACTORY_CLOSED: break;
default:
ASSERT(!"Invalid factory mode");
}
factory->mode = FACTORY_CLOSED;
}
void erts_factory_trim_and_close(ErtsHeapFactory* factory,
Eterm *brefs, Uint brefs_size)
{
ErlHeapFragment *bp;
switch (factory->mode) {
case FACTORY_MESSAGE: {
ErtsMessage *mp = factory->message;
if (mp->data.attached == ERTS_MSG_COMBINED_HFRAG) {
if (!factory->heap_frags) {
Uint sz = factory->hp - factory->hp_start;
mp = erts_shrink_message(mp, sz, brefs, brefs_size);
factory->message = mp;
factory->mode = FACTORY_CLOSED;
return;
}
/*else we don't trim multi fragmented messages for now (off_heap...) */
break;
}
/* Fall through... */
}
case FACTORY_HEAP_FRAGS:
bp = factory->heap_frags;
if (!bp)
break;
if (bp->next == NULL) {
Uint used_sz = factory->hp - bp->mem;
ASSERT(used_sz <= bp->alloc_size);
if (used_sz > 0) {
if (used_sz != bp->alloc_size)
bp = erts_resize_message_buffer(bp, used_sz,
brefs, brefs_size);
}
else {
free_message_buffer(bp);
bp = NULL;
}
factory->heap_frags = bp;
if (factory->mode == FACTORY_MESSAGE)
factory->message->data.heap_frag = bp;
factory->mode = FACTORY_CLOSED;
return;
}
/*else we don't trim multi fragmented messages for now (off_heap...) */
default:
break;
}
erts_factory_close(factory);
}
void erts_factory_undo(ErtsHeapFactory* factory)
{
ErlHeapFragment* bp;
struct erl_off_heap_header *hdr, **hdr_nextp;
switch (factory->mode) {
case FACTORY_HALLOC:
case FACTORY_STATIC:
/* Cleanup off-heap
*/
hdr_nextp = NULL;
for (hdr = factory->off_heap->first;
hdr != factory->off_heap_saved.first;
hdr = hdr->next) {
hdr_nextp = &hdr->next;
}
if (hdr_nextp != NULL) {
*hdr_nextp = NULL;
erts_cleanup_offheap(factory->off_heap);
factory->off_heap->first = factory->off_heap_saved.first;
factory->off_heap->overhead = factory->off_heap_saved.overhead;
}
if (factory->mode == FACTORY_HALLOC) {
/* Free heap frags
*/
bp = factory->p->mbuf;
if (bp != factory->heap_frags_saved) {
do {
ErlHeapFragment *next_bp = bp->next;
ASSERT(bp->off_heap.first == NULL);
ERTS_HEAP_FREE(ERTS_ALC_T_HEAP_FRAG, (void *) bp,
ERTS_HEAP_FRAG_SIZE(bp->alloc_size));
bp = next_bp;
} while (bp != factory->heap_frags_saved);
factory->p->mbuf = bp;
}
/* Rollback heap top
*/
if (HEAP_START(factory->p) <= factory->hp_start
&& factory->hp_start <= HEAP_LIMIT(factory->p)) {
HEAP_TOP(factory->p) = factory->hp_start;
}
/* Fix last heap frag */
if (factory->heap_frags_saved) {
ASSERT(factory->heap_frags_saved == factory->p->mbuf);
if (factory->hp_start != factory->heap_frags_saved->mem)
factory->heap_frags_saved->used_size = factory->heap_frags_saved_used;
else {
factory->p->mbuf = factory->p->mbuf->next;
ERTS_HEAP_FREE(ERTS_ALC_T_HEAP_FRAG, factory->heap_frags_saved,
ERTS_HEAP_FRAG_SIZE(factory->heap_frags_saved->alloc_size));
}
}
}
break;
case FACTORY_MESSAGE:
if (factory->message->data.attached == ERTS_MSG_COMBINED_HFRAG)
factory->message->hfrag.next = factory->heap_frags;
else
factory->message->data.heap_frag = factory->heap_frags;
erts_cleanup_messages(factory->message);
break;
case FACTORY_TMP:
case FACTORY_HEAP_FRAGS:
erts_cleanup_offheap(factory->off_heap);
factory->off_heap->first = NULL;
bp = factory->heap_frags;
while (bp != NULL) {
ErlHeapFragment* next_bp = bp->next;
ASSERT(bp->off_heap.first == NULL);
ERTS_HEAP_FREE(factory->alloc_type, (void *) bp,
ERTS_HEAP_FRAG_SIZE(bp->alloc_size));
bp = next_bp;
}
break;
case FACTORY_CLOSED: break;
default:
ASSERT(!"Invalid factory mode");
}
factory->mode = FACTORY_CLOSED;
#ifdef DEBUG
factory->p = NULL;
factory->hp = NULL;
factory->heap_frags = NULL;
#endif
}
Uint
erts_mbuf_size(Process *p)
{
Uint sz = 0;
ErlHeapFragment* bp;
ErtsMessage* mp;
for (bp = p->mbuf; bp; bp = bp->next)
sz += bp->used_size;
for (mp = p->msg_frag; mp; mp = mp->next)
for (bp = erts_message_to_heap_frag(mp); bp; bp = bp->next)
sz += bp->used_size;
return sz;
}
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