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File 4631-erts-On-halt-and-delayed-halt-support-for-NIFs.patch of Package erlang (Revision e2236faf8ce46a8c7652e4d3a503d1da)

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From 988a0e9f44d2d6a0c114acd1d19bc21b3dee2aea Mon Sep 17 00:00:00 2001
From: Rickard Green <rickard@erlang.org>
Date: Thu, 6 Oct 2022 11:59:31 +0200
Subject: [PATCH] [erts] On-halt and delayed halt support for NIFs

---
 erts/doc/src/erl_nif.xml                      | 175 +++++++
 erts/doc/src/erlang.xml                       | 190 ++++++--
 erts/emulator/beam/break.c                    |   2 +-
 erts/emulator/beam/erl_db.c                   |  42 +-
 erts/emulator/beam/erl_init.c                 |  49 +-
 erts/emulator/beam/erl_lock_check.c           |   1 +
 erts/emulator/beam/erl_nif.c                  | 280 ++++++++++-
 erts/emulator/beam/erl_nif.h                  |  12 +-
 erts/emulator/beam/erl_nif_api_funcs.h        |   3 +
 erts/emulator/beam/erl_process.c              |  12 +-
 erts/emulator/beam/erl_process.h              |   5 +-
 erts/emulator/beam/global.h                   |   8 +-
 erts/emulator/beam/io.c                       |   2 +-
 erts/emulator/test/dirty_nif_SUITE.erl        | 444 +++++++++++++++++-
 .../test/dirty_nif_SUITE_data/Makefile.src    |   2 +-
 .../dirty_nif_SUITE_data/dirty_nif_SUITE.c    | 281 ++++++++++-
 .../test/dirty_nif_SUITE_data/on_halt_a.c     |  23 +
 .../test/dirty_nif_SUITE_data/on_halt_b.c     |  23 +
 .../test/dirty_nif_SUITE_data/on_halt_c.c     |  23 +
 .../test/dirty_nif_SUITE_data/on_halt_d.c     |  23 +
 .../test/dirty_nif_SUITE_data/on_halt_e.c     |  23 +
 .../test/dirty_nif_SUITE_data/on_halt_f.c     |  23 +
 .../test/dirty_nif_SUITE_data/on_halt_nif.c   |  96 ++++
 erts/preloaded/src/erlang.erl                 |  26 +-
 24 files changed, 1661 insertions(+), 107 deletions(-)
 create mode 100644 erts/emulator/test/dirty_nif_SUITE_data/on_halt_a.c
 create mode 100644 erts/emulator/test/dirty_nif_SUITE_data/on_halt_b.c
 create mode 100644 erts/emulator/test/dirty_nif_SUITE_data/on_halt_c.c
 create mode 100644 erts/emulator/test/dirty_nif_SUITE_data/on_halt_d.c
 create mode 100644 erts/emulator/test/dirty_nif_SUITE_data/on_halt_e.c
 create mode 100644 erts/emulator/test/dirty_nif_SUITE_data/on_halt_f.c
 create mode 100644 erts/emulator/test/dirty_nif_SUITE_data/on_halt_nif.c

diff --git a/erts/doc/src/erl_nif.xml b/erts/doc/src/erl_nif.xml
index 4208aa269a..cb300a976d 100644
--- a/erts/doc/src/erl_nif.xml
+++ b/erts/doc/src/erl_nif.xml
@@ -785,6 +785,41 @@ typedef struct {
 	 To compare two monitors, <seecref marker="#enif_compare_monitors">
 <c>enif_compare_monitors</c></seecref> must be used.
 </item>
+ <tag><marker id="ErlNifOnHaltCallback"/><c>ErlNifOnHaltCallback</c></tag>
+ <item>
+ <code type="none">
+typedef void ErlNifOnHaltCallback(void *priv_data);</code>
+ 
+ The function prototype of an on halt callback function.
+ 
+	
+ An on halt callback can be installed using
+ <seecref marker="#on_halt"><c>enif_set_option()</c></seecref>. Such
+ an installed callback will be called when the runtime system is
+ halting.
+ 
+ </item>
+ <tag><marker id="ErlNifOption"/><c>ErlNifOption</c></tag>
+ <item>
+ 
+ An enumeration of the options that can be set using
+ <seecref marker="#enif_set_option"><c>enif_set_option()</c></seecref>.
+ 
+ Currently valid options:
+ <taglist>
+ <tag><seecref marker="#delay_halt"><c>ERL_NIF_OPT_DELAY_HALT</c></seecref></tag>
+ <item>
+ Enable delay of runtime system halt with flushing enabled until
+ all calls to NIFs in the NIF library have returned.
+ </item>
+ <tag><seecref marker="#on_halt"><c>ERL_NIF_OPT_ON_HALT</c></seecref></tag>
+ <item>
+ Install a callback that will be called when the runtime system
+ halts with flushing enabled.
+ </item>
+ </taglist>
+ </item>
+
 <tag><marker id="ErlNifPid"/><c>ErlNifPid</c></tag>
 <item>
 A process identifier (pid). In contrast to pid terms (instances of
@@ -3412,6 +3447,146 @@ if (retval &amp; ERL_NIF_SELECT_STOP_CALLED) {
 </desc>
 </func>
 
+ <func>
+ <name since="OTP 26.0">
+ <ret>int</ret><nametext>enif_set_option(ErlNifEnv *env, ErlNifOption opt, ...)</nametext>
+ </name>
+ <fsummary>
+ Set an option.
+ </fsummary>
+ <desc>
+ <marker id="enif_set_option"/>
+ 
+ Set an option. On success, zero will be returned. On failure, a non
+ zero value will be returned. Currently the following options can be set:
+ 
+ <taglist>
+ <tag><marker id="delay_halt"/>
+ <c>int enif_set_option(ErlNifEnv *env,
+ </c><seecref marker="#ErlNifOption"><c>ERL_NIF_OPT_DELAY_HALT</c></seecref><c>)</c>
+ </tag>
+ <item>
+ 
+ Enable delay of runtime system halt with flushing enabled until
+ all calls to NIFs in the NIF library have returned. If the
+ delay halt feature has not been enabled, a halt with
+ flushing enabled may complete even though processes are still
+ executing inside NIFs in the NIF library. Note that by
+ returning we here mean the first point where the NIF
+ returns control back to the runtime system, and not the
+ point where a call to a NIF return a value back to the Erlang
+ code that called the NIF. That is, if you schedule execution of
+ a NIF, using <seecref marker="#enif_schedule_nif">
+ <c>enif_schedule_nif()</c></seecref>, from within a NIF while
+ the system is halting, the scheduled NIF call will not
+ be executed even though delay halt has been enabled for
+ the NIF library.
+ 
+ 
+ The runtime system halts when one of the
+ <seemfa marker="erlang#halt/0"><c>erlang:halt()</c></seemfa>
+ BIFs are called. By default flushing is enabled, but can be
+ disabled using the
+ <seemfa marker="erlang#halt/2"><c>erlang:halt/2</c></seemfa> BIF.
+ When flushing has been disabled, the delay halt setting
+ will have no effect. That is, the runtime system will halt without
+ waiting for NIFs to return even if the delay halt setting
+ has been enabled. See the
+ <seeerl marker="erlang#halt_flush"><c>{flush, boolean()}</c></seeerl>
+ option of <c>erlang:halt/2</c> for more information.
+ 
+ 
+ The <c>ERL_NIF_OPT_DELAY_HALT</c> option can only be set during
+ loading of a NIF library in a call to <c>enif_set_option()</c>
+ inside a NIF library
+ <seecref marker="#load"><c>load()</c></seecref> or
+ <seecref marker="#upgrade"><c>upgrade()</c></seecref> call,
+ and will fail if set somewhere else. The <c>env</c>
+ argument must be the callback environment passed to the
+ <c>load()</c> or the <c>upgrade()</c> call. This option can also
+ only be set once. That is, the delay halt setting cannot
+ be changed once it has been enabled. The delay halt
+ setting is tied to the module instance with which the NIF library
+ instance has been loaded. That is, in case both a new and old
+ version of a module using the NIF library are loaded, they can
+ have the same or different delay halt settings.
+ 
+ 
+ The delay halt feature can be used in combination with an
+ <seecref marker="#on_halt">on halt</seecref> callback.
+ The on halt callback is in this case typically used to
+ notify processes blocked in NIFs in the library that it is time
+ to return in order to let the runtime system complete the
+ halting. Such NIFs should be dirty NIFs, since ordinary NIFs
+ should never block for a long time.
+ 
+ </item>
+ <tag><marker id="on_halt"/>
+ <c>int enif_set_option(ErlNifEnv *env,
+ </c><seecref marker="#ErlNifOption"><c>ERL_NIF_OPT_ON_HALT</c></seecref><c>,
+ </c><seecref marker="#ErlNifOnHaltCallback"><c>ErlNifOnHaltCallback</c></seecref><c>
+ *on_halt)</c>
+ </tag>
+ <item>
+ 
+ Install a callback that will be called when the runtime system
+ halts with flushing enabled.
+ 
+ 
+ The runtime system halts when one of the
+ <seemfa marker="erlang#halt/0"><c>erlang:halt()</c></seemfa> BIFs
+ are called. By default flushing is enabled, but can be disabled
+ using the
+ <seemfa marker="erlang#halt/2"><c>erlang:halt/2</c></seemfa> BIF.
+ When flushing has been disabled, the runtime system will halt
+ without calling any on halt callbacks even if such are
+ installed. See the
+ <seeerl marker="erlang#halt_flush"><c>{flush, boolean()}</c></seeerl>
+ option of <c>erlang:halt/2</c> for more information.
+ 
+ 
+ The <c>ERL_NIF_OPT_ON_HALT</c> option can only be set during
+ loading of a NIF library in a call to <c>enif_set_option()</c>
+ inside a NIF library
+ <seecref marker="#load"><c>load()</c></seecref> or
+ <seecref marker="#upgrade"><c>upgrade()</c></seecref> call,
+ and will fail if called somewhere else. The <c>env</c>
+ argument must be the callback environment passed to the
+ <c>load()</c> or the <c>upgrade()</c> call. The <c>on_halt</c>
+ argument should be a function pointer to the callback to install.
+ The on halt callback will be tied to the module instance
+ with which the NIF library instance has been loaded. That is, in
+ case both a new and old version of a module using the NIF library
+ are loaded, they can both have different, none, or the same
+ on halt callbacks installed. When unloading the NIF
+ library during a
+ <seemfa marker="kernel:code#purge/1">code purge</seemfa>, an
+ installed on halt callback will be uninstalled.
+ The <c>ERL_NIF_OPT_ON_HALT</c> option can also only be set
+ once. That is, the on halt callback cannot be changed
+ or removed once it has been installed by any other means than
+ purging the module instance that loaded the NIF library.
+ 
+ 
+ When the installed on halt callback is called, it will be
+ passed a pointer to <c>priv_data</c> as argument. The
+ <c>priv_data</c> pointer can be set when loading the NIF library.
+ 
+ 
+ The on halt callback can be used in combination with
+ <seecref marker="#delay_halt">delay of halt</seecref> until
+ all calls into the library have returned. The on halt
+ callback is in this case typically used to notify processes
+ blocked in NIFs in the library that it is time to return in order
+ to let the runtime system complete the halting. Such NIFs should
+ be dirty NIFs, since ordinary NIFs should never block for a long
+ time.
+ 
+ </item>
+ </taglist>
+ </desc>
+ </func>
+
 <func>
 <name since="OTP 22.0"><ret>void</ret>
 <nametext>enif_set_pid_undefined(ErlNifPid* pid)</nametext></name>
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index 8a8a219b97..ece6764017 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -2925,7 +2925,7 @@ uncompiled code with the same arity are mapped to the same list by
 <fsummary>Halt the Erlang runtime system and indicate normal exit to
 the calling environment.</fsummary>
 <desc>
- The same as
+ The same as calling
 <seemfa marker="#halt/2"><c>halt(0, [])</c></seemfa>. Example:
 <pre>
 > <input>halt().</input>
@@ -2934,10 +2934,11 @@ os_prompt%</pre>
 </func>
 
 <func>
- <name name="halt" arity="1" since=""/>
+ <name name="halt" arity="1" clause_i="1"
+ anchor="halt_status_code_1" since=""/>
 <fsummary>Halt the Erlang runtime system.</fsummary>
 <desc>
- The same as <seemfa marker="#halt/2">
+ The same as calling <seemfa marker="#halt/2">
 <c>halt(<anno>Status</anno>, [])</c></seemfa>. Example:
 <pre>
 > <input>halt(17).</input>
@@ -2948,44 +2949,161 @@ os_prompt%</pre>
 </func>
 
 <func>
- <name name="halt" arity="2" since="OTP R15B01"/>
+ <name name="halt" arity="1" clause_i="2"
+ anchor="halt_abort_1" since="OTP R15B01"/>
+ <fsummary>Halt the Erlang runtime system by aborting.</fsummary>
+ <desc>
+ 
+ The same as calling <seeerl marker="#halt_abort_2">
+ <c>halt(abort, [])</c></seeerl>.
+ 
+ </desc>
+ </func>
+
+ <func>
+ <name name="halt" arity="1" clause_i="3"
+ anchor="halt_crash_dump_1" since=""/>
+ <fsummary>
+ Halt the Erlang runtime system and create an Erlang crash dump.
+ </fsummary>
+ <desc>
+ 
+ The same as calling <seeerl marker="#halt_crash_dump_2">
+ <c>halt(<anno>CrashDumpSlogan</anno>, [])</c></seeerl>.
+ 
+ </desc>
+ </func>
+
+ <func>
+ <name name="halt" arity="2" clause_i="1"
+ anchor="halt_status_code_2" since="OTP R15B01"/>
 <fsummary>Halt the Erlang runtime system.</fsummary>
+ <type name="halt_options"/>
 <desc>
- <c><anno>Status</anno></c> must be a non-negative integer, a string,
- or the atom <c>abort</c>.
- Halts the Erlang runtime system. Has no return value.
- Depending on <c><anno>Status</anno></c>, the following occurs:
+ 
+ Halt the runtime system with status code
+ <c><anno>Status</anno></c>.
+ 
+	<note>
+	 
+ On many platforms, the OS supports only status codes 0-255. A too
+ large status code is truncated by clearing the high bits.
+ 
+	</note>
+ 
+ Currently the following options are valid:
+ 
 <taglist>
- <tag>integer()</tag>
- <item>The runtime system exits with integer value
- <c><anno>Status</anno></c>
- as status code to the calling environment (OS).
-	 <note>
-	 On many platforms, the OS supports only status
-	 codes 0-255. A too large status code is truncated by clearing
-	 the high bits.
-	 </note>
- </item>
- <tag>string()</tag>
- <item>An Erlang crash dump is produced with <c><anno>Status</anno></c>
- as slogan. Then the runtime system exits with status code <c>1</c>.
-	 The string will be truncated if longer than 200 characters.
-	 <note>
-	 Before ERTS 9.1 (OTP-20.1) only code points in the range 0-255
-	 was accepted in the string. Now any unicode string is valid.
-	 </note>
- </item>
- <tag><c>abort</c></tag>
- <item>The runtime system aborts producing a core dump, if that is
- enabled in the OS.
+ <tag><marker id="halt_flush"/><c>{flush, EnableFlushing}</c></tag>
+ <item>
+ 
+ If <c>EnableFlushing</c> equals <c>true</c>, which also is the
+ default behavior, the runtime system will perform the following
+ operations before terminating:
+ 
+ <list>
+ <item>
+ Flush all outstanding output.
+ </item>
+ <item>
+ Send all Erlang ports exit signals and wait for them
+ to exit.
+ </item>
+ <item>
+ Wait for all async threads to complete all outstanding
+ async jobs.
+ </item>
+ <item>
+ Call all installed <seecref marker="erl_nif#on_halt">NIF
+ on halt callbacks</seecref>.
+ </item>
+ <item>
+ Wait for all ongoing <seecref marker="erl_nif#delay_halt">NIF
+ calls with the delay halt setting</seecref> enabled to
+ return.
+ </item>
+ <item>
+ Call all installed <c>atexit</c>/<c>on_exit</c> callbacks.
+ </item>
+ </list>
+ 
+ If <c>EnableFlushing</c> equals <c>false</c>, the runtime system
+ will terminate immediately without performing any of the above
+ listed operations.
+ 
+ 
+ Behavior changes compared to earlier versions:
+ 
+ <list>
+ <item>
+ 
+ Runtime systems prior to OTP 26.0 called all installed
+ <c>atexit</c>/<c>on_exit</c> callbacks also when <c>flush</c>
+ was disabled, but as of OTP 26.0 this is no longer the case.
+ 
+ </item>
+ </list>
 </item>
 </taglist>
- For integer <c><anno>Status</anno></c>, the Erlang runtime system
- closes all ports and allows async threads to finish their
- operations before exiting. To exit without such flushing, use
- <c><anno>Option</anno></c> as <c>{flush,false}</c>.
- For statuses <c>string()</c> and <c>abort</c>, option
- <c>flush</c> is ignored and flushing is not done.
+ </desc>
+ </func>
+
+ <func>
+ <name name="halt" arity="2" clause_i="2"
+ anchor="halt_abort_2" since="OTP R15B01"/>
+ <fsummary>Halt the Erlang runtime system by aborting.</fsummary>
+ <type name="halt_options"/>
+ <desc>
+ 
+ Halt the Erlang runtime system by aborting and produce a core dump
+ if core dumping has been enabled in the environment that the
+ runtime system is executing in.
+ 
+ <note>
+ The <seeerl marker="#halt_flush"><c>{flush, boolean()}</c></seeerl>
+ option will be ignored, and flushing will be disabled.
+ </note>
+ </desc>
+ </func>
+
+ <func>
+ <name name="halt" arity="2" clause_i="3"
+ anchor="halt_crash_dump_2" since="OTP R15B01"/>
+ <fsummary>
+ Halt the Erlang runtime system and create an Erlang crash dump.
+ </fsummary>
+ <type name="halt_options"/>
+ <desc>
+ 
+ Halt the Erlang runtime system and generate an
+	 <seeguide marker="crash_dump">Erlang crash dump</seeguide>. The
+ string <c><anno>CrashDumpSlogan</anno></c> will be used as slogan
+ in the Erlang crash dump created. The slogan will be trunkated if
+ <c><anno>CrashDumpSlogan</anno></c> is longer than 1023 characters.
+ 
+ <note>
+ The <seeerl marker="#halt_flush"><c>{flush, boolean()}</c></seeerl>
+ option will be ignored, and flushing will be disabled.
+ </note>
+ 
+ Behavior changes compared to earlier versions:
+ 
+ <list>
+ <item>
+ 
+ Before OTP 24.2, the slogan was truncated if
+ <c><anno>CrashDumpSlogan</anno></c> was longer than 200
+ characters. Now it will be truncated if longer than 1023
+ characters.
+ 
+ </item>
+ <item>
+ 
+ Before OTP 20.1, only code points in the range 0-255 were
+ accepted in the slogan. Now any Unicode string is valid.
+ 
+ </item>
+ </list>
 </desc>
 </func>
 
diff --git a/erts/emulator/beam/break.c b/erts/emulator/beam/break.c
index 3b6de45587..8097ed337b 100644
--- a/erts/emulator/beam/break.c
+++ b/erts/emulator/beam/break.c
@@ -781,7 +781,7 @@ crash_dump_limited_writer(void* vfdp, char* buf, size_t len)
 }
 
 /* We assume that crash dump was called from erts_exit_vv() */
- erts_exit_epilogue();
+ erts_exit_epilogue(0);
 }
 
 /* XXX THIS SHOULD BE IN SYSTEM !!!! */
diff --git a/erts/emulator/beam/erl_db.c b/erts/emulator/beam/erl_db.c
index bdcb136a05..3c2df49138 100644
--- a/erts/emulator/beam/erl_db.c
+++ b/erts/emulator/beam/erl_db.c
@@ -506,13 +506,13 @@ save_sched_table(Process *c_p, DbTable *tb)
 DbTable *first;
 
 ASSERT(esdp);
- erts_atomic_inc_nob(&esdp->ets_tables.count);
+ erts_atomic_inc_nob(&esdp->u.ets_tables.count);
 erts_refc_inc(&tb->common.refc, 1);
 
- first = esdp->ets_tables.clist;
+ first = esdp->u.ets_tables.clist;
 if (!first) {
 tb->common.all.next = tb->common.all.prev = tb;
- esdp->ets_tables.clist = tb;
+ esdp->u.ets_tables.clist = tb;
 }
 else {
 tb->common.all.prev = first->common.all.prev;
@@ -530,14 +530,14 @@ remove_sched_table(ErtsSchedulerData *esdp, DbTable *tb)
 ASSERT(erts_get_ref_numbers_thr_id(ERTS_MAGIC_BIN_REFN(tb->common.btid))
 == (Uint32) esdp->no);
 
- ASSERT(erts_atomic_read_nob(&esdp->ets_tables.count) > 0);
- erts_atomic_dec_nob(&esdp->ets_tables.count);
+ ASSERT(erts_atomic_read_nob(&esdp->u.ets_tables.count) > 0);
+ erts_atomic_dec_nob(&esdp->u.ets_tables.count);
 
 eaydp = ERTS_SCHED_AUX_YIELD_DATA(esdp, ets_all);
 if (eaydp->ongoing) {
 /* ets:all() op process list from last to first... */
 if (eaydp->tab == tb) {
- if (eaydp->tab == esdp->ets_tables.clist)
+ if (eaydp->tab == esdp->u.ets_tables.clist)
 eaydp->tab = NULL;
 else
 eaydp->tab = tb->common.all.prev;
@@ -546,23 +546,23 @@ remove_sched_table(ErtsSchedulerData *esdp, DbTable *tb)
 
 if (tb->common.all.next == tb) {
 ASSERT(tb->common.all.prev == tb);
- ASSERT(esdp->ets_tables.clist == tb);
- esdp->ets_tables.clist = NULL;
+ ASSERT(esdp->u.ets_tables.clist == tb);
+ esdp->u.ets_tables.clist = NULL;
 }
 else {
 #ifdef DEBUG
- DbTable *tmp = esdp->ets_tables.clist;
+ DbTable *tmp = esdp->u.ets_tables.clist;
 do {
 if (tmp == tb) break;
 tmp = tmp->common.all.next;
- } while (tmp != esdp->ets_tables.clist);
+ } while (tmp != esdp->u.ets_tables.clist);
 ASSERT(tmp == tb);
 #endif
 tb->common.all.prev->common.all.next = tb->common.all.next;
 tb->common.all.next->common.all.prev = tb->common.all.prev;
 
- if (esdp->ets_tables.clist == tb)
- esdp->ets_tables.clist = tb->common.all.next;
+ if (esdp->u.ets_tables.clist == tb)
+ esdp->u.ets_tables.clist = tb->common.all.next;
 
 }
 
@@ -3207,7 +3207,7 @@ ets_all_reply(ErtsSchedulerData *esdp, ErtsEtsAllReq **reqpp,
 hp = &hfragp->mem[hfragp->used_size];
 list = *hp;
 hfragp->used_size = hfragp->alloc_size;
- first = esdp->ets_tables.clist;
+ first = esdp->u.ets_tables.clist;
 tb = *tablepp;
 }
 else {
@@ -3215,7 +3215,7 @@ ets_all_reply(ErtsSchedulerData *esdp, ErtsEtsAllReq **reqpp,
 ASSERT(!*tablepp);
 
 /* Max heap size needed... */
- sz = erts_atomic_read_nob(&esdp->ets_tables.count);
+ sz = erts_atomic_read_nob(&esdp->u.ets_tables.count);
 sz *= ERTS_MAGIC_REF_THING_SIZE + 2;
 sz += 3 + ERTS_REF_THING_SIZE;
 hfragp = new_message_buffer(sz);
@@ -3223,7 +3223,7 @@ ets_all_reply(ErtsSchedulerData *esdp, ErtsEtsAllReq **reqpp,
 hp = &hfragp->mem[0];
 ohp = &hfragp->off_heap;
 list = NIL;
- first = esdp->ets_tables.clist;
+ first = esdp->u.ets_tables.clist;
 tb = first ? first->common.all.prev : NULL;
 }
 
@@ -3309,7 +3309,7 @@ erts_handle_yielded_ets_all_request(ErtsAuxWorkData *awdp)
 return 0; /* All work completed! */
 
 if (yc < ERTS_ETS_ALL_TB_YCNT_START &&
- yc > erts_atomic_read_nob(&esdp->ets_tables.count))
+ yc > erts_atomic_read_nob(&esdp->u.ets_tables.count))
 return 1; /* Yield! */
 
 eaydp->ongoing = ongoing = eaydp->queue;
@@ -4511,8 +4511,8 @@ erts_ets_sched_spec_data_init(ErtsSchedulerData *esdp)
 eaydp->hfrag = NULL;
 eaydp->tab = NULL;
 eaydp->queue = NULL;
- esdp->ets_tables.clist = NULL;
- erts_atomic_init_nob(&esdp->ets_tables.count, 0);
+ esdp->u.ets_tables.clist = NULL;
+ erts_atomic_init_nob(&esdp->u.ets_tables.count, 0);
 }
 
 
@@ -5349,7 +5349,7 @@ erts_db_foreach_table(void (*func)(DbTable *, void *), void *arg, int alive_only
 
 for (ix = 0; ix < erts_no_schedulers; ix++) {
 ErtsSchedulerData *esdp = ERTS_SCHEDULER_IX(ix);
- DbTable *first = esdp->ets_tables.clist;
+ DbTable *first = esdp->u.ets_tables.clist;
 if (first) {
 DbTable *tb = first;
 do {
@@ -5393,7 +5393,7 @@ Uint erts_ets_table_count(void)
 
 for (six = 0; six < erts_no_schedulers; six++) {
 ErtsSchedulerData *esdp = &erts_aligned_scheduler_data[six].esd;
- tb_count += erts_atomic_read_nob(&esdp->ets_tables.count);
+ tb_count += erts_atomic_read_nob(&esdp->u.ets_tables.count);
 }
 return tb_count;
 }
@@ -5460,7 +5460,7 @@ static void lcnt_update_db_locks_per_sched(void *enable) {
 DbTable *head;
 
 esdp = erts_get_scheduler_data();
- head = esdp->ets_tables.clist;
+ head = esdp->u.ets_tables.clist;
 
 if(head) {
 DbTable *iterator = head;
diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c
index 95e41226fc..ee22672391 100644
--- a/erts/emulator/beam/erl_init.c
+++ b/erts/emulator/beam/erl_init.c
@@ -2538,7 +2538,7 @@ __decl_noreturn void erts_thr_fatal_error(int err, const char *what)
 
 
 static void
-system_cleanup(int flush_async)
+system_cleanup(int flush)
 {
 /*
 * Make sure only one thread exits the runtime system.
@@ -2568,24 +2568,43 @@ system_cleanup(int flush_async)
 * (in threaded non smp case).
 */
 
- if (!flush_async
-	|| !erts_initialized
-	)
+ if (!flush || !erts_initialized)
 	return;
 
+ /*
+ * We only flush as a result of calling erts_halt() (which in turn
+ * is called from the erlang:halt() BIF when flushing is enabled);
+ * otherwise, flushing wont work properly. If erts_halt() has
+ * been called, 'erts_halt_code' won't equal INT_MIN...
+ */
+ ASSERT(erts_halt_code != INT_MIN);
+
+ /*
+ * Nif on-halt handlers may have been added after we initiated
+ * a halt. If so, make sure that these late added handlers are
+ * executed as well..
+ */
+ erts_nif_execute_on_halt();
+
 #ifdef ERTS_ENABLE_LOCK_CHECK
 erts_lc_check_exact(NULL, 0);
 #endif
 
 erts_exit_flush_async();
+
+ /*
+ * Wait for all NIF calls with delayed halt functionality
+ * enabled to complete before we continue...
+ */
+ erts_nif_wait_calls();
 }
 
 static int erts_exit_code;
 
 static __decl_noreturn void __noreturn
-erts_exit_vv(int n, int flush_async, const char *fmt, va_list args1, va_list args2)
+erts_exit_vv(int n, int flush, const char *fmt, va_list args1, va_list args2)
 {
- system_cleanup(flush_async);
+ system_cleanup(flush);
 
 if (fmt != NULL && *fmt != '\0')
 	erl_error(fmt, args2);	/* Print error message. */
@@ -2598,25 +2617,25 @@ erts_exit_vv(int n, int flush_async, const char *fmt, va_list args1, va_list arg
 	erl_crash_dump_v((char*) NULL, 0, fmt, args1);
 }
 
- erts_exit_epilogue();
+ erts_exit_epilogue(flush);
 }
 
-__decl_noreturn void __noreturn erts_exit_epilogue(void)
+__decl_noreturn void __noreturn erts_exit_epilogue(int flush)
 {
 int n = erts_exit_code;
 
 sys_tty_reset(n);
 
 if (n == ERTS_INTR_EXIT)
-	exit(0);
+	(void) (flush ? exit(0) : _exit(0));
 else if (n == ERTS_DUMP_EXIT)
 	ERTS_EXIT_AFTER_DUMP(1);
 else if (n == ERTS_ERROR_EXIT || n == ERTS_ABORT_EXIT)
 abort();
- exit(n);
+ (void) (flush ? exit(n) : _exit(n));
 }
 
-/* Exit without flushing async threads */
+/* Exit without flushing */
 __decl_noreturn void __noreturn erts_exit(int n, const char *fmt, ...)
 {
 va_list args1, args2;
@@ -2627,8 +2646,12 @@ __decl_noreturn void __noreturn erts_exit(int n, const char *fmt, ...)
 va_end(args1);
 }
 
-/* Exit after flushing async threads */
-__decl_noreturn void __noreturn erts_flush_async_exit(int n, char *fmt, ...)
+/*
+ * Exit after flushing. This is a continuation of erts_halt() and wont
+ * work properly if called by its own without proper initialization
+ * as made in erts_halt().
+ */
+__decl_noreturn void __noreturn erts_flush_exit(int n, char *fmt, ...)
 {
 va_list args1, args2;
 va_start(args1, fmt);
diff --git a/erts/emulator/beam/erl_lock_check.c b/erts/emulator/beam/erl_lock_check.c
index c6f127e5a4..f299889dcc 100644
--- a/erts/emulator/beam/erl_lock_check.c
+++ b/erts/emulator/beam/erl_lock_check.c
@@ -108,6 +108,7 @@ static erts_lc_lock_order_t erts_lock_order[] = {
 {	"fun_tab",				NULL			},
 {	"environ",				NULL			},
 {	"release_literal_areas",		NULL			},
+ { "on_halt", NULL },
 {	"drv_ev_state_grow",			NULL, 		},
 {	"drv_ev_state",				"address"		},
 {	"safe_hash",				"address"		},
diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index 50ac6b92d9..f3cc8be6ed 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -71,6 +71,17 @@
 #include <limits.h>
 #include <stddef.h> /* offsetof */
 
+#define ERTS_NIF_HALT_INFO_FLAG_BLOCK (1 << 0)
+#define ERTS_NIF_HALT_INFO_FLAG_HALTING (1 << 1)
+#define ERTS_NIF_HALT_INFO_FLAG_WAITING (1 << 2)
+
+typedef struct ErtsNifOnHaltData_ ErtsNifOnHaltData;
+struct ErtsNifOnHaltData_ {
+ ErtsNifOnHaltData *next;
+ ErtsNifOnHaltData *prev;
+ ErlNifOnHaltCallback *callback;
+};
+
 /* Information about a loaded nif library.
 * Each successful call to erlang:load_nif will allocate an instance of
 * erl_module_nif. Two calls opening the same library will thus have the same
@@ -95,11 +106,21 @@ struct erl_module_nif {
 +1 for each owned resource type with callbacks
 +1 for each ongoing dirty NIF call
 */
+ int flags;
+ ErtsNifOnHaltData on_halt;
 Module* mod; /* Can be NULL if purged and dynlib_refc > 0 */
 
 ErlNifFunc _funcs_copy_[1]; /* only used for old libs */
 };
 
+#define ERTS_MOD_NIF_FLG_LOADING (1 << 0)
+#define ERTS_MOD_NIF_FLG_DELAY_HALT (1 << 1)
+#define ERTS_MOD_NIF_FLG_ON_HALT (1 << 2)
+
+static erts_atomic_t halt_tse;
+static erts_mtx_t on_halt_mtx;
+static ErtsNifOnHaltData *on_halt_requests;
+
 typedef ERL_NIF_TERM (*NativeFunPtr)(ErlNifEnv*, int, const ERL_NIF_TERM[]);
 
 #ifdef DEBUG
@@ -131,6 +152,8 @@ void dtrace_nifenv_str(ErlNifEnv *, char *);
 
 #define MIN_HEAP_FRAG_SZ 200
 static Eterm* alloc_heap_heavy(ErlNifEnv* env, size_t need, Eterm* hp);
+static void install_on_halt_callback(ErtsNifOnHaltData *ohdp);
+static void uninstall_on_halt_callback(ErtsNifOnHaltData *ohdp);
 
 static ERTS_INLINE int
 is_scheduler(void)
@@ -370,6 +393,25 @@ schedule(ErlNifEnv* env, NativeFunPtr direct_fp, NativeFunPtr indirect_fp,
 return (ERL_NIF_TERM) THE_NON_VALUE;
 }
 
+static ERTS_NOINLINE void
+eternal_sleep(void)
+{
+ while (!0)
+ erts_milli_sleep(1000*1000);
+}
+
+static ERTS_NOINLINE void
+handle_halting_unblocked_halt(erts_aint32_t info)
+{
+ if (info & ERTS_NIF_HALT_INFO_FLAG_WAITING) {
+ erts_tse_t *tse;
+ ERTS_THR_MEMORY_BARRIER;
+ tse = (erts_tse_t *) erts_atomic_read_nob(&halt_tse);
+ ASSERT(tse);
+ erts_tse_set(tse);
+ }
+ eternal_sleep();
+}
 
 static ERL_NIF_TERM dirty_nif_finalizer(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
 static ERL_NIF_TERM dirty_nif_exception(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
@@ -419,7 +461,34 @@ erts_call_dirty_nif(ErtsSchedulerData *esdp,
 
 erts_proc_unlock(c_p, ERTS_PROC_LOCK_MAIN);
 
- result = (*dirty_nif)(&env, codemfa->arity, argv); /* Call dirty NIF */
+ if (!(env.mod_nif->flags & ERTS_MOD_NIF_FLG_DELAY_HALT)) {
+ result = (*dirty_nif)(&env, codemfa->arity, argv); /* Call dirty NIF */
+ }
+ else {
+ erts_atomic32_t *dirty_nif_halt_info = &esdp->u.dirty_nif_halt_info;
+ erts_aint32_t info;
+ info = erts_atomic32_cmpxchg_nob(dirty_nif_halt_info,
+ ERTS_NIF_HALT_INFO_FLAG_BLOCK,
+ 0);
+ if (info != 0) {
+ ASSERT(info == ERTS_NIF_HALT_INFO_FLAG_HALTING
+ || info == (ERTS_NIF_HALT_INFO_FLAG_HALTING
+ | ERTS_NIF_HALT_INFO_FLAG_WAITING));
+ eternal_sleep();
+ }
+ result = (*dirty_nif)(&env, codemfa->arity, argv); /* Call dirty NIF */
+ info = erts_atomic32_read_band_relb(dirty_nif_halt_info,
+ ~ERTS_NIF_HALT_INFO_FLAG_BLOCK);
+ if (info & ERTS_NIF_HALT_INFO_FLAG_HALTING) {
+ ASSERT(info == (ERTS_NIF_HALT_INFO_FLAG_BLOCK
+ | ERTS_NIF_HALT_INFO_FLAG_HALTING)
+ || info == (ERTS_NIF_HALT_INFO_FLAG_BLOCK
+ | ERTS_NIF_HALT_INFO_FLAG_HALTING
+ | ERTS_NIF_HALT_INFO_FLAG_WAITING));
+ handle_halting_unblocked_halt(info);
+ }
+ ASSERT(info == ERTS_NIF_HALT_INFO_FLAG_BLOCK);
+ }
 
 erts_proc_lock(c_p, ERTS_PROC_LOCK_MAIN);
 
@@ -2277,6 +2346,9 @@ static void close_dynlib(struct erl_module_nif* lib)
 ASSERT(lib->handle != NULL);
 ASSERT(erts_refc_read(&lib->dynlib_refc,0) == 0);
 
+ if (lib->flags & ERTS_MOD_NIF_FLG_ON_HALT)
+ uninstall_on_halt_callback(&lib->on_halt);
+
 if (lib->entry.unload != NULL) {
 	struct enif_msg_environment_t msg_env;
 pre_nif_noproc(&msg_env, lib, NULL);
@@ -4524,6 +4596,8 @@ Eterm erts_load_nif(Process *c_p, ErtsCodePtr I, Eterm filename, Eterm args)
 lib->handle = handle;
 erts_refc_init(&lib->refc, 2); /* Erlang code + NIF code */
 erts_refc_init(&lib->dynlib_refc, 1);
+ lib->flags = 0;
+ lib->on_halt.callback = NULL;
 ASSERT(opened_rt_list == NULL);
 lib->mod = module_p;
 
@@ -4642,7 +4716,7 @@ Eterm erts_load_nif(Process *c_p, ErtsCodePtr I, Eterm filename, Eterm args)
 /* Call load or upgrade:
 */
 env.mod_nif = lib;
-
+ lib->flags |= ERTS_MOD_NIF_FLG_LOADING;
 lib->priv_data = NULL;
 if (prev_mi->nif != NULL) { /**************** Upgrade ***************/
 void* prev_old_data = prev_mi->nif->priv_data;
@@ -4676,11 +4750,14 @@ Eterm erts_load_nif(Process *c_p, ErtsCodePtr I, Eterm filename, Eterm args)
 ret = load_nif_error(c_p, "load", "Library load-call unsuccessful (%d).", veto);
 }
 }
+ lib->flags &= ~ERTS_MOD_NIF_FLG_LOADING;
 
 if (ret == am_ok) {
 	/*
 * Everything ok, make NIF code callable.
 	 */
+ if (lib->flags & ERTS_MOD_NIF_FLG_ON_HALT)
+ install_on_halt_callback(&lib->on_halt);
 	this_mi->nif = lib;
 prepare_opened_rt(lib);
 /*
@@ -5046,6 +5123,20 @@ void erl_nif_init()
 
 nif_call_table_init();
 static_nifs_init();
+
+ erts_atomic_init_nob(&halt_tse, (erts_aint_t) NULL);
+ erts_mtx_init(&on_halt_mtx, "on_halt", NIL,
+ ERTS_LOCK_FLAGS_CATEGORY_GENERIC);
+ on_halt_requests = NULL;
+}
+
+void
+erts_nif_sched_init(ErtsSchedulerData *esdp)
+{
+ if (esdp->type == ERTS_SCHED_DIRTY_CPU
+ || esdp->type == ERTS_SCHED_DIRTY_IO) {
+ erts_atomic32_init_nob(&esdp->u.dirty_nif_halt_info, 0);
+ }
 }
 
 int erts_nif_get_funcs(struct erl_module_nif* mod,
@@ -5133,6 +5224,191 @@ Eterm erts_nif_call_function(Process *p, Process *tracee,
 return nif_result;
 }
 
+/*
+ * Set options...
+ */
+
+int
+enif_set_option(ErlNifEnv *env, ErlNifOption opt, ...)
+{
+ if (!env)
+ return EINVAL;
+
+ switch (opt) {
+
+ case ERL_NIF_OPT_DELAY_HALT: {
+ struct erl_module_nif *m = env->mod_nif;
+
+ if (!m || !(m->flags & ERTS_MOD_NIF_FLG_LOADING)
+ || (m->flags & ERTS_MOD_NIF_FLG_DELAY_HALT)) {
+ return EINVAL;
+ }
+
+ m->flags |= ERTS_MOD_NIF_FLG_DELAY_HALT;
+
+ return 0;
+ }
+
+ case ERL_NIF_OPT_ON_HALT: {
+ struct erl_module_nif *m = env->mod_nif;
+ ErlNifOnHaltCallback *on_halt;
+ va_list argp;
+
+ if (!m || ((m->flags & (ERTS_MOD_NIF_FLG_LOADING
+ | ERTS_MOD_NIF_FLG_ON_HALT))
+ != ERTS_MOD_NIF_FLG_LOADING)) {
+ return EINVAL;
+ }
+
+ ASSERT(!m->on_halt.callback);
+
+ va_start(argp, opt);
+ on_halt = va_arg(argp, ErlNifOnHaltCallback *);
+ va_end(argp);
+ if (!on_halt)
+ return EINVAL;
+
+ m->on_halt.callback = on_halt;
+ m->flags |= ERTS_MOD_NIF_FLG_ON_HALT;
+
+ return 0;
+ }
+
+ default:
+ return EINVAL;
+
+ }
+}
+
+/*
+ * Halt functionality...
+ */
+
+void
+erts_nif_execute_on_halt(void)
+{
+ ErtsNifOnHaltData *ohdp;
+
+ erts_mtx_lock(&on_halt_mtx);
+ for (ohdp = on_halt_requests; ohdp; ohdp = ohdp->next) {
+ struct erl_module_nif *m;
+ m = ErtsContainerStruct(ohdp, struct erl_module_nif, on_halt);
+ ohdp->callback(m->priv_data);
+ }
+ on_halt_requests = NULL;
+ erts_mtx_unlock(&on_halt_mtx);
+}
+
+void
+erts_nif_notify_halt(void)
+{
+ int ix;
+
+ erts_nif_execute_on_halt();
+
+ for (ix = 0; ix < erts_no_dirty_cpu_schedulers; ix++) {
+ ErtsSchedulerData *esdp = ERTS_DIRTY_CPU_SCHEDULER_IX(ix);
+ ASSERT(esdp->type == ERTS_SCHED_DIRTY_CPU);
+ (void) erts_atomic32_read_bor_nob(&esdp->u.dirty_nif_halt_info,
+ ERTS_NIF_HALT_INFO_FLAG_HALTING);
+ }
+ for (ix = 0; ix < erts_no_dirty_io_schedulers; ix++) {
+ ErtsSchedulerData *esdp = ERTS_DIRTY_IO_SCHEDULER_IX(ix);
+ ASSERT(esdp->type == ERTS_SCHED_DIRTY_IO);
+ (void) erts_atomic32_read_bor_nob(&esdp->u.dirty_nif_halt_info,
+ ERTS_NIF_HALT_INFO_FLAG_HALTING);
+ }
+}
+
+static ERTS_INLINE void
+wait_dirty_call_blocking_halt(ErtsSchedulerData *esdp, erts_tse_t *tse)
+{
+ erts_atomic32_t *dirty_nif_halt_info = &esdp->u.dirty_nif_halt_info;
+ erts_aint32_t info = erts_atomic32_read_acqb(dirty_nif_halt_info);
+ ASSERT(info & ERTS_NIF_HALT_INFO_FLAG_HALTING);
+ if (!(info & ERTS_NIF_HALT_INFO_FLAG_BLOCK))
+ return;
+ info = erts_atomic32_read_bor_mb(dirty_nif_halt_info,
+ ERTS_NIF_HALT_INFO_FLAG_WAITING);
+ if (!(info & ERTS_NIF_HALT_INFO_FLAG_BLOCK))
+ return;
+ while (!0) {
+ erts_tse_reset(tse);
+ info = erts_atomic32_read_acqb(dirty_nif_halt_info);
+ if (!(info & ERTS_NIF_HALT_INFO_FLAG_BLOCK))
+ return;
+ while (!0) {
+ if (erts_tse_wait(tse) != EINTR)
+ break;
+ }
+ }
+}
+
+void
+erts_nif_wait_calls(void)
+{
+ erts_tse_t *tse;
+ int ix;
+
+ tse = erts_tse_fetch();
+ erts_atomic_set_nob(&halt_tse, (erts_aint_t) tse);
+
+ for (ix = 0; ix < erts_no_dirty_cpu_schedulers; ix++) {
+ ErtsSchedulerData *esdp = ERTS_DIRTY_CPU_SCHEDULER_IX(ix);
+ ASSERT(esdp->type == ERTS_SCHED_DIRTY_CPU);
+ wait_dirty_call_blocking_halt(esdp, tse);
+ }
+ for (ix = 0; ix < erts_no_dirty_io_schedulers; ix++) {
+ ErtsSchedulerData *esdp = ERTS_DIRTY_IO_SCHEDULER_IX(ix);
+ ASSERT(esdp->type == ERTS_SCHED_DIRTY_IO);
+ wait_dirty_call_blocking_halt(esdp, tse);
+ }
+}
+
+static void
+install_on_halt_callback(ErtsNifOnHaltData *ohdp)
+{
+ ASSERT(ohdp->callback);
+
+ erts_mtx_lock(&on_halt_mtx);
+ ohdp->next = on_halt_requests;
+ ohdp->prev = NULL;
+ if (on_halt_requests)
+ on_halt_requests->prev = ohdp;
+ on_halt_requests = ohdp;
+ erts_mtx_unlock(&on_halt_mtx);
+}
+
+static void
+uninstall_on_halt_callback(ErtsNifOnHaltData *ohdp)
+{
+ erts_mtx_lock(&on_halt_mtx);
+ ohdp->callback = NULL;
+ if (ohdp->prev) {
+ ASSERT(on_halt_requests != ohdp);
+ ohdp->prev->next = ohdp->next;
+ }
+ else if (on_halt_requests == ohdp) {
+ ASSERT(erts_halt_code == INT_MIN);
+ on_halt_requests = ohdp->next;
+ }
+ else {
+ /*
+ * Uninstall during halt; and our callback
+ * has already been called...
+ */
+ ASSERT(erts_halt_code != INT_MIN);
+ }
+ if (ohdp->next) {
+ ohdp->next->prev = ohdp->prev;
+ }
+ erts_mtx_unlock(&on_halt_mtx);
+}
+
+/*
+ * End of halt functionality...
+ */
+
 #ifdef USE_VM_PROBES
 void dtrace_nifenv_str(ErlNifEnv *env, char *process_buf)
 {
diff --git a/erts/emulator/beam/erl_nif.h b/erts/emulator/beam/erl_nif.h
index a9a81483f6..1ed1201cf2 100644
--- a/erts/emulator/beam/erl_nif.h
+++ b/erts/emulator/beam/erl_nif.h
@@ -57,9 +57,10 @@
 ** 2.15: 22.0 ERL_NIF_SELECT_CANCEL, enif_select_(read|write)
 ** enif_term_type
 ** 2.16: 24.0 enif_init_resource_type, enif_dynamic_resource_call
+** 2.17 26.0 enif_set_option
 */
 #define ERL_NIF_MAJOR_VERSION 2
-#define ERL_NIF_MINOR_VERSION 16
+#define ERL_NIF_MINOR_VERSION 17
 
 /*
 * WHEN CHANGING INTERFACE VERSION, also replace erts version below with
@@ -70,7 +71,7 @@
 * If you're not on the OTP team, you should use a placeholder like
 * erts-@MyName@ instead.
 */
-#define ERL_NIF_MIN_ERTS_VERSION "erts-12.0"
+#define ERL_NIF_MIN_ERTS_VERSION "erts-12.3"
 
 /*
 * The emulator will refuse to load a nif-lib with a major version
@@ -201,6 +202,8 @@ typedef struct
 
 typedef ErlDrvMonitor ErlNifMonitor;
 
+typedef void ErlNifOnHaltCallback(void *priv_data);
+
 typedef struct enif_resource_type_t ErlNifResourceType;
 typedef void ErlNifResourceDtor(ErlNifEnv*, void*);
 typedef void ErlNifResourceStop(ErlNifEnv*, void*, ErlNifEvent, int is_direct_call);
@@ -325,6 +328,11 @@ typedef enum {
 #define ERL_NIF_THR_DIRTY_CPU_SCHEDULER 2
 #define ERL_NIF_THR_DIRTY_IO_SCHEDULER 3
 
+typedef enum {
+ ERL_NIF_OPT_DELAY_HALT = 1,
+ ERL_NIF_OPT_ON_HALT = 2
+} ErlNifOption;
+
 #if (defined(__WIN32__) || defined(_WIN32) || defined(_WIN32_))
 # define ERL_NIF_API_FUNC_DECL(RET_TYPE, NAME, ARGS) RET_TYPE (*NAME) ARGS
 typedef struct {
diff --git a/erts/emulator/beam/erl_nif_api_funcs.h b/erts/emulator/beam/erl_nif_api_funcs.h
index f9004eb64b..a2a1052b59 100644
--- a/erts/emulator/beam/erl_nif_api_funcs.h
+++ b/erts/emulator/beam/erl_nif_api_funcs.h
@@ -219,6 +219,8 @@ ERL_NIF_API_FUNC_DECL(ErlNifTermType,enif_term_type,(ErlNifEnv* env, ERL_NIF_TER
 ERL_NIF_API_FUNC_DECL(ErlNifResourceType*,enif_init_resource_type,(ErlNifEnv*, const char* name_str, const ErlNifResourceTypeInit*, ErlNifResourceFlags flags, ErlNifResourceFlags* tried));
 ERL_NIF_API_FUNC_DECL(int,enif_dynamic_resource_call,(ErlNifEnv*, ERL_NIF_TERM mod, ERL_NIF_TERM name, ERL_NIF_TERM rsrc, void* call_data));
 
+ERL_NIF_API_FUNC_DECL(int, enif_set_option, (ErlNifEnv *env, ErlNifOption opt, ...));
+
 /*
 ** ADD NEW ENTRIES HERE (before this comment) !!!
 */
@@ -408,6 +410,7 @@ ERL_NIF_API_FUNC_DECL(int,enif_dynamic_resource_call,(ErlNifEnv*, ERL_NIF_TERM m
 # define enif_term_type ERL_NIF_API_FUNC_MACRO(enif_term_type)
 # define enif_init_resource_type ERL_NIF_API_FUNC_MACRO(enif_init_resource_type)
 # define enif_dynamic_resource_call ERL_NIF_API_FUNC_MACRO(enif_dynamic_resource_call)
+# define enif_set_option ERL_NIF_API_FUNC_MACRO(enif_set_option)
 /*
 ** ADD NEW ENTRIES HERE (before this comment)
 */
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index 17780a7e87..2e45c00cb8 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -2498,7 +2498,7 @@ notify_reap_ports_relb(void)
 }
 
 erts_atomic32_t erts_halt_progress;
-int erts_halt_code;
+int erts_halt_code = INT_MIN;
 
 static ERTS_INLINE erts_aint32_t
 handle_reap_ports(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting)
@@ -2543,7 +2543,7 @@ handle_reap_ports(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting)
 	 erts_port_release(prt);
 	}
 	if (erts_atomic32_dec_read_nob(&erts_halt_progress) == 0) {
-	 erts_flush_async_exit(erts_halt_code, "");
+	 erts_flush_exit(erts_halt_code, "");
 	}
 }
 return aux_work & ~ERTS_SSI_AUX_WORK_REAP_PORTS;
@@ -6298,7 +6298,7 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online, int no_poll_th
 
 
 erts_atomic32_init_relb(&erts_halt_progress, -1);
- erts_halt_code = 0;
+ erts_halt_code = INT_MIN;
 
 
 }
@@ -8656,6 +8656,7 @@ sched_thread_func(void *vesdp)
 
 erts_ets_sched_spec_data_init(esdp);
 erts_utils_sched_spec_data_init();
+ erts_nif_sched_init(esdp);
 
 process_main(esdp);
 
@@ -8706,6 +8707,8 @@ sched_dirty_cpu_thread_func(void *vesdp)
 
 erts_proc_lock_prepare_proc_lock_waiter();
 
+ erts_nif_sched_init(esdp);
+
 erts_dirty_process_main(esdp);
 /* No schedulers should *ever* terminate */
 erts_exit(ERTS_ABORT_EXIT,
@@ -8754,6 +8757,8 @@ sched_dirty_io_thread_func(void *vesdp)
 
 erts_proc_lock_prepare_proc_lock_waiter();
 
+ erts_nif_sched_init(esdp);
+
 erts_dirty_process_main(esdp);
 /* No schedulers should *ever* terminate */
 erts_exit(ERTS_ABORT_EXIT,
@@ -14820,6 +14825,7 @@ void erts_halt(int code)
 ERTS_RUNQ_FLGS_SET(ERTS_DIRTY_CPU_RUNQ, ERTS_RUNQ_FLG_HALTING);
 ERTS_RUNQ_FLGS_SET(ERTS_DIRTY_IO_RUNQ, ERTS_RUNQ_FLG_HALTING);
 	erts_halt_code = code;
+ erts_nif_notify_halt();
 }
 }
 
diff --git a/erts/emulator/beam/erl_process.h b/erts/emulator/beam/erl_process.h
index 8dc55a8da0..a5922e0bf3 100644
--- a/erts/emulator/beam/erl_process.h
+++ b/erts/emulator/beam/erl_process.h
@@ -727,7 +727,10 @@ struct ErtsSchedulerData_ {
 ErtsSchedWallTime sched_wall_time;
 ErtsGCInfo gc_info;
 ErtsPortTaskHandle nosuspend_port_task_handle;
- ErtsEtsTables ets_tables;
+ union {
+ ErtsEtsTables ets_tables;
+ erts_atomic32_t dirty_nif_halt_info;
+ } u;
 #ifdef ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC
 erts_alloc_verify_func_t verify_unused_temp_alloc;
 Allctr_t *verify_unused_temp_alloc_data;
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
index 8c4dd90966..a6b26bc50b 100644
--- a/erts/emulator/beam/global.h
+++ b/erts/emulator/beam/global.h
@@ -127,6 +127,10 @@ Eterm erts_load_nif(Process *c_p, ErtsCodePtr I, Eterm filename, Eterm args);
 
 void erts_unload_nif(struct erl_module_nif* nif);
 extern void erl_nif_init(void);
+extern void erts_nif_sched_init(ErtsSchedulerData *esdp);
+extern void erts_nif_execute_on_halt(void);
+extern void erts_nif_notify_halt(void);
+extern void erts_nif_wait_calls(void);
 extern int erts_nif_get_funcs(struct erl_module_nif*,
 struct enif_func_t **funcs);
 extern Module *erts_nif_get_module(struct erl_module_nif*);
@@ -1044,9 +1048,9 @@ double erts_get_positive_zero_float(void);
 
 /* config.c */
 
-__decl_noreturn void __noreturn erts_exit_epilogue(void);
+__decl_noreturn void __noreturn erts_exit_epilogue(int flush);
 __decl_noreturn void __noreturn erts_exit(int n, const char*, ...);
-__decl_noreturn void __noreturn erts_flush_async_exit(int n, char*, ...);
+__decl_noreturn void __noreturn erts_flush_exit(int n, char*, ...);
 void erl_error(const char*, va_list);
 
 /* This controls whether sharing-preserving copy is used by Erlang */
diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c
index dfdbe475b3..81c3ca29ae 100644
--- a/erts/emulator/beam/io.c
+++ b/erts/emulator/beam/io.c
@@ -3772,7 +3772,7 @@ terminate_port(Port *prt)
 if ((state & ERTS_PORT_SFLG_HALT)
 	&& (erts_atomic32_dec_read_nob(&erts_halt_progress) == 0)) {
 	erts_port_release(prt); /* We will exit and never return */
-	erts_flush_async_exit(erts_halt_code, "");
+	erts_flush_exit(erts_halt_code, "");
 }
 if (is_internal_port(send_closed_port_id))
 	deliver_result(NULL, send_closed_port_id, connected_id, am_closed);
diff --git a/erts/emulator/test/dirty_nif_SUITE.erl b/erts/emulator/test/dirty_nif_SUITE.erl
index 59d791eb2b..2bba329234 100644
--- a/erts/emulator/test/dirty_nif_SUITE.erl
+++ b/erts/emulator/test/dirty_nif_SUITE.erl
@@ -29,13 +29,49 @@
 -export([all/0, suite/0,
 	 init_per_suite/1, end_per_suite/1,
 	 init_per_testcase/2, end_per_testcase/2,
+ init_per_group/2, end_per_group/2, groups/0,
 	 dirty_nif/1, dirty_nif_send/1,
 	 dirty_nif_exception/1, call_dirty_nif_exception/1,
 	 dirty_scheduler_exit/1, dirty_call_while_terminated/1,
 	 dirty_heap_access/1, dirty_process_info/1,
 	 dirty_process_register/1, dirty_process_trace/1,
 	 code_purge/1, literal_area/1, dirty_nif_send_traced/1,
-	 nif_whereis/1, nif_whereis_parallel/1, nif_whereis_proxy/1]).
+	 nif_whereis/1, nif_whereis_parallel/1, nif_whereis_proxy/1,
+ set_halt_options_from_nif/1,
+ delay_halt/1,
+ delay_halt_old_code/1,
+ delay_halt_old_and_new_code/1,
+ flush_false/1,
+ on_halt/1,
+ on_halt_old_code/1,
+ on_halt_old_and_new_code/1,
+ sync_halt/1,
+ many_delay_halt/1,
+ many_on_halt/1]).
+
+-export([load_nif/2]).
+
+-nifs([lib_loaded/0,
+ call_dirty_nif/3,
+ send_from_dirty_nif/1,
+ send_wait_from_dirty_nif/1,
+ call_dirty_nif_exception/1,
+ call_dirty_nif_zero_args/0,
+ dirty_call_while_terminated_nif/1,
+ dirty_sleeper/0,
+ dirty_sleeper/1,
+ dirty_heap_access_nif/1,
+ whereis_term/2,
+ whereis_send/3,
+ dirty_terminating_literal_access/2,
+ delay_halt_normal/3,
+ delay_halt_io_bound/3,
+ delay_halt_cpu_bound/3,
+ sync_halt_io_bound/2,
+ sync_halt_cpu_bound/2,
+ set_halt_option_from_nif_normal/1,
+ set_halt_option_from_nif_io_bound/1,
+ set_halt_option_from_nif_cpu_bound/1]).
 
 -define(nif_stub,nif_stub_error(?LINE)).
 
@@ -55,23 +91,38 @@ all() ->
 literal_area,
 dirty_nif_send_traced,
 nif_whereis,
- nif_whereis_parallel].
+ nif_whereis_parallel,
+ {group, halt_normal},
+ {group, halt_dirty_cpu},
+ {group, halt_dirty_io},
+ {group, halt_misc}].
+
+halt_sched_tests() ->
+ [set_halt_options_from_nif, delay_halt, delay_halt_old_code, delay_halt_old_and_new_code].
+halt_dirty_sched_tests() ->
+ [sync_halt, flush_false].
+
+groups() ->
+ [{halt_normal, [parallel], halt_sched_tests()},
+ {halt_dirty_cpu, [parallel], halt_sched_tests()++halt_dirty_sched_tests()},
+ {halt_dirty_io, [parallel], halt_sched_tests()++halt_dirty_sched_tests()},
+ {halt_misc, [parallel], [on_halt, on_halt_old_code, on_halt_old_and_new_code, many_on_halt, many_delay_halt]}].
+
+init_per_group(Group, Config) ->
+ [{group, Group} | Config].
+
+end_per_group(_, Config) ->
+ proplists:delete(group, Config).
 
 init_per_suite(Config) ->
- case erlang:system_info(dirty_cpu_schedulers) of
-	N when N > 0 ->
-	 case lib_loaded() of
-		false ->
-		 ok = erlang:load_nif(
-			 filename:join(?config(data_dir, Config),
-					 "dirty_nif_SUITE"), []);
-		true ->
-		 ok
-	 end,
-	 Config;
- _ ->
-	 {skipped, "No dirty scheduler support"}
- end.
+ case lib_loaded() of
+ false ->
+ ok = erlang:load_nif(filename:join(?config(data_dir, Config),
+ "dirty_nif_SUITE"), []);
+ true ->
+ ok
+ end,
+ Config.
 
 end_per_suite(_Config) ->
 ok.
@@ -82,6 +133,9 @@ init_per_testcase(Case, Config) ->
 end_per_testcase(_Case, _Config) ->
 ok.
 
+load_nif(NifLib, LibInfo) ->
+ erlang:load_nif(NifLib, LibInfo).
+
 dirty_nif(Config) when is_list(Config) ->
 Val1 = 42,
 Val2 = "Erlang",
@@ -536,6 +590,356 @@ literal_area(Config) when is_list(Config) ->
 literal_area_collector_test:check_idle(5000),
 {comment, "Waited "++integer_to_list(TMO)++" milliseconds after purge"}.
 
+set_halt_options_from_nif(Config) when is_list(Config) ->
+ case ?config(group, Config) of
+ halt_normal ->
+ error = set_halt_option_from_nif_normal(set_on_halt_handler),
+ error = set_halt_option_from_nif_normal(delay_halt);
+ halt_dirty_cpu ->
+ error = set_halt_option_from_nif_cpu_bound(set_on_halt_handler),
+ error = set_halt_option_from_nif_cpu_bound(delay_halt);
+ halt_dirty_io ->
+ error = set_halt_option_from_nif_io_bound(set_on_halt_handler),
+ error = set_halt_option_from_nif_io_bound(delay_halt)
+ end,
+ ok.
+
+delay_halt(Config) when is_list(Config) ->
+ delay_halt(Config, new_code).
+
+delay_halt_old_code(Config) when is_list(Config) ->
+ delay_halt(Config, old_code).
+
+delay_halt_old_and_new_code(Config) when is_list(Config) ->
+ delay_halt(Config, old_and_new_code).
+
+delay_halt(Config, Type) ->
+ Suite = filename:join(?config(data_dir, Config), ?MODULE_STRING),
+ Priv = proplists:get_value(priv_dir, Config),
+ TypeSuffix = "_"++atom_to_list(Type),
+ {Fun, FileName} = case ?config(group, Config) of
+ halt_normal ->
+ {fun delay_halt_normal/3, "delay_halt_normal"++TypeSuffix};
+ halt_dirty_io ->
+ {fun delay_halt_io_bound/3, "delay_halt_io_bound"++TypeSuffix};
+ halt_dirty_cpu ->
+ {fun delay_halt_cpu_bound/3, "delay_halt_cpu_bound"++TypeSuffix}
+ end,
+ Tester = self(),
+ NifFileName = filename:join(Priv, FileName),
+ {ok, Peer, Node} = ?CT_PEER(),
+ Mon = erlang:monitor(process, Peer),
+ ok = erpc:call(Node, ?MODULE, load_nif, [Suite, {delay_halt}]),
+ ok = erpc:call(Node, file, set_cwd, [Priv]),
+ Proxy = spawn_link(Node,
+ fun () ->
+ receive
+ {delay_halt, _} = Msg ->
+ unlink(Tester),
+ Tester ! Msg
+ end
+ end),
+ Start = erlang:monotonic_time(millisecond),
+ ok = erpc:cast(Node, fun () -> Fun(Proxy, FileName, 2) end),
+ receive {delay_halt, Pid} when is_pid(Pid), Node == node(Pid) -> ok end,
+ case Type of
+ new_code ->
+ ok;
+ old_code ->
+ true = erpc:call(Node, erlang, delete_module, [dirty_nif_SUITE]);
+ old_and_new_code ->
+ true = erpc:call(Node, erlang, delete_module, [dirty_nif_SUITE]),
+ ok = erpc:call(Node, ?MODULE, load_nif, [Suite, {delay_halt}]),
+ Proxy2 = spawn_link(Node,
+ fun () ->
+ receive
+ {delay_halt, _} = Msg ->
+ unlink(Tester),
+ Tester ! Msg
+ end
+ end),
+ ok = erpc:cast(Node, fun () -> Fun(Proxy2, FileName++"_new_code", 2) end),
+ receive {delay_halt, Pid2} when is_pid(Pid2), Node == node(Pid2) -> ok end
+ end,
+ ok = erpc:cast(Node, erlang, halt, []),
+ ok = wait_until(fun () ->
+ {ok, <<"ok">>} == file:read_file(NifFileName)
+ andalso
+ (Type /= old_and_new_code
+ orelse {ok, <<"ok">>} == file:read_file(NifFileName++"_new_code"))
+ end,
+ 6000),
+ Time = erlang:monotonic_time(millisecond) - Start,
+ ct:log("~s time=~pms", [FileName, Time]),
+ true = Time >= 2000,
+ receive {'DOWN', Mon, process, Peer, _} -> ok end,
+ ok.
+
+flush_false(Config) when is_list(Config) ->
+ Suite = filename:join(?config(data_dir, Config), ?MODULE_STRING),
+ Priv = proplists:get_value(priv_dir, Config),
+ {Fun, FileName} = case ?config(group, Config) of
+ halt_dirty_io ->
+ {fun delay_halt_io_bound/3, "flush_false_io_bound"};
+ halt_dirty_cpu ->
+ {fun delay_halt_cpu_bound/3, "flush_false_cpu_bound"}
+ end,
+ Tester = self(),
+ NifFileName = filename:join(Priv, FileName),
+ OnHaltBaseName = FileName++"_on_halt",
+ OnHaltFileName = filename:join(Priv, OnHaltBaseName),
+ {ok, Peer, Node} = ?CT_PEER(),
+ Mon = erlang:monitor(process, Peer),
+ ok = erpc:call(Node, ?MODULE, load_nif, [Suite, {sync_halt, OnHaltBaseName, 1}]),
+ ok = erpc:call(Node, file, set_cwd, [Priv]),
+ Proxy = spawn_link(Node,
+ fun () ->
+ receive
+ {delay_halt, _} = Msg ->
+ unlink(Tester),
+ Tester ! Msg
+ end
+ end),
+ Start = erlang:monotonic_time(millisecond),
+ ok = erpc:cast(Node, fun () -> Fun(Proxy, FileName, 1) end),
+ receive {delay_halt, Pid} when is_pid(Pid), Node == node(Pid) -> ok end,
+ ok = erpc:cast(Node, erlang, halt, [0, [{flush,false}]]),
+ receive {'DOWN', Mon, process, Peer, _} -> ok end,
+ Time = erlang:monotonic_time(millisecond) - Start,
+ ct:log("~s time=~pms", [FileName, Time]),
+ Wait = 3000-Time,
+ if Wait > 0 -> receive after Wait -> ok end;
+ true -> ok
+ end,
+ {error,enoent} = file:read_file(NifFileName),
+ {error,enoent} = file:read_file(OnHaltFileName),
+ ok.
+
+many_delay_halt(Config) when is_list(Config) ->
+ try
+ many_delay_halt_test(Config)
+ catch
+ throw:{skip, _} = Skip ->
+ Skip
+ end.
+
+many_delay_halt_test(Config) ->
+ Suite = filename:join(?config(data_dir, Config), ?MODULE_STRING),
+ Priv = proplists:get_value(priv_dir, Config),
+ Tester = self(),
+ {ok, Peer, Node} = ?CT_PEER(),
+ Chk = fun () ->
+ case erlang:system_info(schedulers_online) of
+ 1 -> throw({skip, "Too few schedulers online"});
+ _ -> ok
+ end,
+ case erlang:system_info(dirty_cpu_schedulers_online) of
+ 1 -> throw({skip, "Too few dirty cpu schedulers online"});
+ _ -> ok
+ end,
+ case erlang:system_info(dirty_io_schedulers) of
+ 1 -> throw({skip, "Too few dirty io schedulers online"});
+ _ -> ok
+ end
+ end,
+ try
+ erpc:call(Node, Chk)
+ catch
+ throw:{skip, _} = Skip ->
+ peer:stop(Peer),
+ throw(Skip)
+ end,
+ Mon = erlang:monitor(process, Peer),
+ ok = erpc:call(Node, ?MODULE, load_nif, [Suite, {delay_halt}]),
+ ok = erpc:call(Node, file, set_cwd, [Priv]),
+ ProxyFun = fun (Tag) ->
+ fun () ->
+ receive
+ {delay_halt, _} = Msg ->
+ unlink(Tester),
+ Tester ! {Tag, Msg}
+ end
+ end
+ end,
+ [P1, P2, P3, P4, P5] = [spawn_link(Node, ProxyFun(X)) || X <- lists:seq(1, 5)],
+ Start = erlang:monotonic_time(millisecond),
+ ok = erpc:cast(Node, fun () -> delay_halt_io_bound(P1, "many_delay_halt_io2", 2) end),
+ ok = erpc:cast(Node, fun () -> delay_halt_io_bound(P2, "many_delay_halt_io1", 1) end),
+ ok = erpc:cast(Node, fun () -> delay_halt_cpu_bound(P3, "many_delay_halt_cpu1", 1) end),
+ ok = erpc:cast(Node, fun () -> delay_halt_cpu_bound(P4, "many_delay_halt_cpu2", 2) end),
+ _ = [receive
+ {X, {delay_halt, Pid}} when is_pid(Pid), Node == node(Pid) ->
+ ok
+ end || X <- lists:seq(1, 4)],
+ ok = erpc:cast(Node, fun () -> delay_halt_normal(P5, "many_delay_halt_normal", 1) end),
+ receive
+ {5, {delay_halt, Pid}} when is_pid(Pid), Node == node(Pid) ->
+ ok
+ end,
+ ok = erpc:cast(Node, erlang, halt, []),
+ ok = wait_until(fun () ->
+ {ok, <<"ok">>} == file:read_file(filename:join(Priv, "many_delay_halt_io2"))
+ andalso {ok, <<"ok">>} == file:read_file(filename:join(Priv, "many_delay_halt_cpu2"))
+ end,
+ 3000),
+ {ok, <<"ok">>} = file:read_file(filename:join(Priv, "many_delay_halt_cpu1")),
+ {ok, <<"ok">>} = file:read_file(filename:join(Priv, "many_delay_halt_io1")),
+ {ok, <<"ok">>} = file:read_file(filename:join(Priv, "many_delay_halt_normal")),
+ Time = erlang:monotonic_time(millisecond) - Start,
+ ct:log("many_delay_halt time=~pms", [Time]),
+ true = Time >= 2000,
+ receive {'DOWN', Mon, process, Peer, _} -> ok end,
+ ok.
+
+on_halt(Config) when is_list(Config) ->
+ on_halt(Config, new_code).
+
+on_halt_old_code(Config) when is_list(Config) ->
+ on_halt(Config, old_code).
+
+on_halt_old_and_new_code(Config) when is_list(Config) ->
+ on_halt(Config, old_and_new_code).
+
+on_halt(Config, Type) ->
+ Suite = filename:join(?config(data_dir, Config), ?MODULE_STRING),
+ Priv = proplists:get_value(priv_dir, Config),
+ FileName = "on_halt_"++atom_to_list(Type),
+ OnHaltFileName = filename:join(Priv, FileName),
+ {ok, Peer, Node} = ?CT_PEER(),
+ Mon = erlang:monitor(process, Peer),
+ ok = erpc:call(Node, ?MODULE, load_nif, [Suite, {on_halt, FileName, 1}]),
+ case Type of
+ new_code ->
+ ok;
+ old_code ->
+ true = erpc:call(Node, erlang, delete_module, [dirty_nif_SUITE]);
+ old_and_new_code ->
+ true = erpc:call(Node, erlang, delete_module, [dirty_nif_SUITE]),
+ ok = erpc:call(Node, ?MODULE, load_nif, [Suite, {on_halt, FileName++"_new", 1}])
+ end,
+ ok = erpc:call(Node, file, set_cwd, [Priv]),
+ Start = erlang:monotonic_time(millisecond),
+ ok = erpc:cast(Node, erlang, halt, []),
+ ok = wait_until(fun () ->
+ {ok, <<"ok">>} == file:read_file(OnHaltFileName)
+ andalso (Type /= old_and_new_code
+ orelse {ok, <<"ok">>} == file:read_file(OnHaltFileName++"_new"))
+ end,
+ 3000),
+ Time = erlang:monotonic_time(millisecond) - Start,
+ ct:log("~s time=~pms", [FileName, Time]),
+ if Type == old_and_new_code -> true = Time >= 2000;
+ true -> true = Time >= 1000
+ end,
+ receive {'DOWN', Mon, process, Peer, _} -> ok end,
+ ok.
+
+on_halt_module_code_format() ->
+ lists:flatten(["-module(~s).~n",
+ "-export([load/1, lib_loaded/0]).~n",
+ "-nifs([lib_loaded/0]).~n",
+ "load(SoFile) -> erlang:load_nif(SoFile, ?MODULE_STRING).~n",
+ "lib_loaded() -> false.~n"]).
+
+many_on_halt(Config) when is_list(Config) ->
+ DDir = ?config(data_dir, Config),
+ Priv = proplists:get_value(priv_dir, Config),
+ OnHaltModules = ["on_halt_a","on_halt_b","on_halt_c","on_halt_d","on_halt_e","on_halt_f"],
+ DeleteOnHaltModules = ["on_halt_a","on_halt_c","on_halt_d","on_halt_f"],
+ PurgeOnHaltModules = DeleteOnHaltModules -- ["on_halt_d"],
+ ActiveOnHaltModules = OnHaltModules -- PurgeOnHaltModules,
+ lists:foreach(fun (ModStr) ->
+ Code = io_lib:format(on_halt_module_code_format(), [ModStr]),
+ ok = file:write_file(filename:join(DDir, ModStr++".erl"), Code)
+ end,
+ OnHaltModules),
+ {ok, Peer, Node} = ?CT_PEER(),
+ Mon = erlang:monitor(process, Peer),
+ ok = erpc:call(Node,
+ fun () ->
+ ok = file:set_cwd(Priv),
+ lists:foreach(fun (ModStr) ->
+ AbsModStr = filename:join(DDir, ModStr),
+ {ok,Mod,Bin} = compile:file(AbsModStr, [binary]),
+ {module, Mod} = erlang:load_module(Mod, Bin),
+ ok = Mod:load(AbsModStr),
+ true = Mod:lib_loaded()
+ end,
+ OnHaltModules),
+ lists:foreach(fun (ModStr) ->
+ Mod = list_to_atom(ModStr),
+ true = erlang:delete_module(Mod)
+ end, DeleteOnHaltModules),
+ lists:foreach(fun (ModStr) ->
+ Mod = list_to_atom(ModStr),
+ true = erlang:purge_module(Mod)
+ end, PurgeOnHaltModules),
+ ok
+ end),
+ Start = erlang:monotonic_time(millisecond),
+ ok = erpc:cast(Node, erlang, halt, []),
+ ok = wait_until(fun () ->
+ try
+ lists:foreach(fun (ModStr) ->
+ FileName = filename:join(Priv, ModStr),
+ {ok, <<"ok">>} = file:read_file(FileName)
+ end, ActiveOnHaltModules),
+ true
+ catch
+ _:_ ->
+ false
+ end
+ end,
+ 1000*(length(ActiveOnHaltModules)+1)),
+ Time = erlang:monotonic_time(millisecond) - Start,
+ ct:log("many_on_halt time=~pms", [Time]),
+ true = Time >= length(ActiveOnHaltModules)*1000,
+ receive {'DOWN', Mon, process, Peer, _} -> ok end,
+ ok.
+
+sync_halt(Config) when is_list(Config) ->
+ Suite = filename:join(?config(data_dir, Config), ?MODULE_STRING),
+ Priv = proplists:get_value(priv_dir, Config),
+ {Fun, FileName} = case ?config(group, Config) of
+ halt_dirty_io ->
+ {fun sync_halt_io_bound/2, "sync_halt_io_bound"};
+ halt_dirty_cpu ->
+ {fun sync_halt_cpu_bound/2, "sync_halt_cpu_bound"}
+ end,
+ Tester = self(),
+ NifFileName = filename:join(Priv, FileName),
+ OnHaltBaseFileName = FileName++".onhalt",
+ OnHaltFileName = filename:join(Priv, OnHaltBaseFileName),
+ {ok, Peer, Node} = ?CT_PEER(),
+ Mon = erlang:monitor(process, Peer),
+ ok = erpc:call(Node, ?MODULE, load_nif, [Suite, {sync_halt, OnHaltBaseFileName, 1}]),
+ ok = erpc:call(Node, file, set_cwd, [Priv]),
+ Proxy = spawn_link(Node,
+ fun () ->
+ receive
+ {sync_halt, _} = Msg ->
+ unlink(Tester),
+ Tester ! Msg
+ end
+ end),
+ ok = erpc:cast(Node, fun () -> Fun(Proxy, FileName) end),
+ receive {sync_halt, Pid} when is_pid(Pid), Node == node(Pid) -> ok end,
+ Start = erlang:monotonic_time(millisecond),
+ ok = erpc:cast(Node, erlang, halt, []),
+ ok = wait_until(fun () ->
+ {ok, <<"ok">>} == file:read_file(OnHaltFileName)
+ end,
+ 2000),
+ ok = wait_until(fun () ->
+ {ok, <<"ok">>} == file:read_file(NifFileName)
+ end,
+ 4000),
+ Time = erlang:monotonic_time(millisecond) - Start,
+ ct:log("~s time=~pms", [FileName, Time]),
+ true = Time >= 1000,
+ receive {'DOWN', Mon, process, Peer, _} -> ok end,
+ ok.
+
 %%
 %% Internal...
 %%
@@ -774,6 +1178,14 @@ dirty_heap_access_nif(_) -> ?nif_stub.
 whereis_term(_Type,_Name) -> ?nif_stub.
 whereis_send(_Type,_Name,_Msg) -> ?nif_stub.
 dirty_terminating_literal_access(_Me, _Literal) -> ?nif_stub.
+delay_halt_normal(_Pid, _FileName, _Delay) -> ?nif_stub.
+delay_halt_io_bound(_Pid, _FileName, _Delay) -> ?nif_stub.
+delay_halt_cpu_bound(_Pid, _FileName, _Delay) -> ?nif_stub.
+sync_halt_io_bound(_Pid, _FileName) -> ?nif_stub.
+sync_halt_cpu_bound(_Pid, _FileName) -> ?nif_stub.
+set_halt_option_from_nif_normal(_Op) -> ?nif_stub.
+set_halt_option_from_nif_io_bound(_Op) -> ?nif_stub.
+set_halt_option_from_nif_cpu_bound(_Op) -> ?nif_stub.
 
 nif_stub_error(Line) ->
 exit({nif_not_loaded,module,?MODULE,line,Line}).
diff --git a/erts/emulator/test/dirty_nif_SUITE_data/Makefile.src b/erts/emulator/test/dirty_nif_SUITE_data/Makefile.src
index 4462afd815..55ca552cb2 100644
--- a/erts/emulator/test/dirty_nif_SUITE_data/Makefile.src
+++ b/erts/emulator/test/dirty_nif_SUITE_data/Makefile.src
@@ -1,5 +1,5 @@
 
-NIF_LIBS = dirty_nif_SUITE@dll@
+NIF_LIBS = dirty_nif_SUITE@dll@ on_halt_a@dll@ on_halt_b@dll@ on_halt_c@dll@ on_halt_d@dll@ on_halt_e@dll@ on_halt_f@dll@
 
 all: $(NIF_LIBS) echo_drv@dll@
 
diff --git a/erts/emulator/test/dirty_nif_SUITE_data/dirty_nif_SUITE.c b/erts/emulator/test/dirty_nif_SUITE_data/dirty_nif_SUITE.c
index fb5146278b..7f0fc9ea46 100644
--- a/erts/emulator/test/dirty_nif_SUITE_data/dirty_nif_SUITE.c
+++ b/erts/emulator/test/dirty_nif_SUITE_data/dirty_nif_SUITE.c
@@ -19,11 +19,14 @@
 */
 #include <erl_nif.h>
 #include <assert.h>
+#include <errno.h>
 #ifdef __WIN32__
 #include <windows.h>
 #else
 #include <unistd.h>
 #endif
+#include <stdio.h>
+#include <string.h>
 
 /*
 * Hack to get around this function missing from the NIF API.
@@ -43,8 +46,128 @@ static ERL_NIF_TERM atom_pid;
 static ERL_NIF_TERM atom_port;
 static ERL_NIF_TERM atom_send;
 
+typedef struct {
+ int halting;
+ int on_halt_wait;
+ ErlNifMutex *mtx;
+ ErlNifCond *cnd;
+ char *filename;
+} PrivData;
+
+static PrivData *make_priv_data(void)
+{
+ PrivData *pdata = enif_alloc(sizeof(PrivData));
+ if (!pdata)
+ return NULL;
+ pdata->halting = 0;
+ pdata->on_halt_wait = 0;
+ pdata->mtx = NULL;
+ pdata->cnd = NULL;
+ pdata->filename = NULL;
+ return pdata;
+}
+
+static void unload(ErlNifEnv *env, void *priv_data)
+{
+ if (priv_data) {
+ PrivData *pdata = priv_data;
+ if (pdata->mtx)
+ enif_mutex_destroy(pdata->mtx);
+ if (pdata->cnd)
+ enif_cond_destroy(pdata->cnd);
+ if (pdata->filename)
+ enif_free(pdata->filename);
+ enif_free(pdata);
+ }
+}
+
+static void on_halt(void *priv_data);
+
 static int load(ErlNifEnv* env, void** priv_data, ERL_NIF_TERM load_info)
 {
+ int arity;
+ const ERL_NIF_TERM *array;
+ if (enif_get_tuple(env, load_info, &arity, &array)) {
+ char atom_text[32];
+ int err;
+ unsigned filename_len;
+ PrivData *pdata = NULL;
+
+ if (arity < 1 || 3 < arity)
+ return __LINE__;
+ if (!enif_get_atom(env, array[0], &atom_text[0],
+ sizeof(atom_text), ERL_NIF_LATIN1)) {
+ return __LINE__;
+ }
+ pdata = make_priv_data();
+ if (!pdata)
+ return __LINE__;
+ if (strcmp(atom_text, "on_halt") == 0) {
+ if (0 != enif_set_option(env, ERL_NIF_OPT_ON_HALT, on_halt)) {
+ unload(env, pdata);
+ return __LINE__;
+ }
+ }
+ else if (strcmp(atom_text, "delay_halt") == 0) {
+ if (0 != enif_set_option(env, ERL_NIF_OPT_DELAY_HALT)) {
+ unload(env, pdata);
+ return __LINE__;
+ }
+ }
+ else if (strcmp(atom_text, "sync_halt") == 0) {
+ if (0 != enif_set_option(env, ERL_NIF_OPT_ON_HALT, on_halt)) {
+ unload(env, pdata);
+ return __LINE__;
+ }
+ if (0 != enif_set_option(env, ERL_NIF_OPT_DELAY_HALT)) {
+ unload(env, pdata);
+ return __LINE__;
+ }
+ pdata->mtx = enif_mutex_create("sync_halt_dirty_nif_SUITE");
+ pdata->cnd = enif_cond_create("sync_halt_dirty_nif_SUITE");
+ if (!pdata->mtx || !pdata->cnd) {
+ unload(env, pdata);
+ return __LINE__;
+ }
+ }
+ else {
+ unload(env, pdata);
+ return __LINE__;
+ }
+
+ if (arity >= 2) {
+ if (!enif_get_list_length(env, array[1], &filename_len)) {
+ unload(env, pdata);
+ return __LINE__;
+ }
+ if (filename_len > 0) {
+ filename_len++;
+ pdata->filename = enif_alloc(filename_len);
+ if (!pdata->filename) {
+ unload(env, pdata);
+ return __LINE__;
+ }
+ if (filename_len != enif_get_string(env,
+ array[1],
+ pdata->filename,
+ filename_len,
+ ERL_NIF_LATIN1)) {
+ unload(env, pdata);
+ return __LINE__;
+ }
+ }
+ }
+ if (arity == 3) {
+ if (!enif_get_int(env, array[2], &pdata->on_halt_wait)
+ || pdata->on_halt_wait < 0
+ || pdata->on_halt_wait*1000 < 0) {
+ unload(env, pdata);
+ return __LINE__;
+ }
+ }
+ *priv_data = (void *) pdata;
+ }
+
 atom_badarg = enif_make_atom(env, "badarg");
 atom_error = enif_make_atom(env, "error");
 atom_false = enif_make_atom(env,"false");
@@ -57,6 +180,11 @@ static int load(ErlNifEnv* env, void** priv_data, ERL_NIF_TERM load_info)
 return 0;
 }
 
+static int upgrade(ErlNifEnv* env, void** priv_data, void** old_priv_data, ERL_NIF_TERM load_info)
+{
+ return load(env, priv_data, load_info);
+}
+
 static ERL_NIF_TERM lib_loaded(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
 {
 return enif_make_atom(env, "true");
@@ -468,6 +596,149 @@ static ERL_NIF_TERM dirty_terminating_literal_access(ErlNifEnv* env, int argc, c
 return self_term;
 }
 
+static int fn_write_ok(char *filename)
+{
+ FILE *file = fopen(filename, "w");
+ if (!file)
+ return EINVAL;
+ if (1 != fwrite("ok", 2, 1, file))
+ return EINVAL;
+ fclose(file);
+ return 0;
+}
+
+static int efn_write_ok(ErlNifEnv *env, const ERL_NIF_TERM arg)
+{
+ int res;
+ unsigned filename_len;
+ char *filename;
+
+ if (!enif_get_list_length(env, arg, &filename_len) || filename_len < 2) {
+ res = EINVAL;
+ goto done;
+ }
+ filename_len++;
+ filename = enif_alloc(filename_len);
+ if (!filename) {
+ res = ENOMEM;
+ goto done;
+ }
+ if (filename_len != enif_get_string(env,
+ arg,
+ filename,
+ filename_len,
+ ERL_NIF_LATIN1)) {
+ res = EINVAL;
+ goto done;
+ }
+ res = fn_write_ok(filename);
+done:
+ if (filename)
+ enif_free(filename);
+ switch (res) {
+ case 0:
+ return atom_ok;
+ case ENOMEM:
+ return enif_raise_exception(env, enif_make_atom(env, "enomem"));
+ default:
+ return enif_make_badarg(env);
+ }
+}
+
+static ERL_NIF_TERM delay_halt(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
+{
+ ERL_NIF_TERM msg;
+ ErlNifPid receiver, self;
+ int res, secs;
+
+ if (argc != 3)
+ return enif_make_badarg(env);
+ if (!enif_get_int(env, argv[2], &secs))
+ return enif_make_badarg(env);
+ if (secs < 0 || secs*1000 < 0)
+ return enif_make_badarg(env);
+ if (!enif_self(env, &self))
+	return enif_make_badarg(env);
+ if (!enif_get_local_pid(env, argv[0], &receiver))
+	return enif_make_badarg(env);
+ msg = enif_make_tuple2(env, enif_make_atom(env, "delay_halt"), enif_make_pid(env, &self));
+ res = enif_send(env, &receiver, NULL, msg);
+ if (!res)
+	return enif_make_badarg(env);
+
+#ifdef __WIN32__
+ Sleep(secs*1000);
+#else
+ sleep(secs);
+#endif
+ return efn_write_ok(env, argv[1]);
+}
+
+static ERL_NIF_TERM sync_halt(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
+{
+ ERL_NIF_TERM msg;
+ ErlNifPid receiver, self;
+ int res;
+ PrivData *pdata = enif_priv_data(env);
+ if (!pdata)
+ return enif_raise_exception(env, enif_make_atom(env, "missing_priv_data"));
+ if (argc != 2)
+ return enif_make_badarg(env);
+ if (!enif_self(env, &self))
+	return enif_make_badarg(env);
+ if (!enif_get_local_pid(env, argv[0], &receiver))
+	return enif_make_badarg(env);
+ msg = enif_make_tuple2(env, enif_make_atom(env, "sync_halt"), enif_make_pid(env, &self));
+ res = enif_send(env, &receiver, NULL, msg);
+ if (!res)
+	return enif_make_badarg(env);
+ enif_mutex_lock(pdata->mtx);
+ while (!pdata->halting)
+ enif_cond_wait(pdata->cnd, pdata->mtx);
+ enif_mutex_unlock(pdata->mtx);
+ return efn_write_ok(env, argv[1]);
+}
+
+static ERL_NIF_TERM set_halt_option_from_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
+{
+ unsigned len;
+ char atom_text[32];
+ if (argc != 1)
+ return enif_make_badarg(env);
+ if (!enif_get_atom(env, argv[0], &atom_text[0], sizeof(atom_text), ERL_NIF_LATIN1))
+ return enif_make_badarg(env);
+ if (strcmp(atom_text, "set_on_halt_handler") == 0) {
+ if (0 == enif_set_option(env, ERL_NIF_OPT_ON_HALT, on_halt))
+ return atom_ok;
+ return atom_error;
+ }
+ else if (strcmp(atom_text, "delay_halt") == 0) {
+ if (0 == enif_set_option(env, ERL_NIF_OPT_DELAY_HALT))
+ return atom_ok;
+ return atom_error;
+ }
+ return enif_make_badarg(env);
+}
+
+static void on_halt(void *priv_data)
+{
+ PrivData *pdata = (PrivData *)priv_data;
+ int res;
+#ifdef __WIN32__
+ Sleep(pdata->on_halt_wait*1000);
+#else
+ sleep(pdata->on_halt_wait);
+#endif
+ if (pdata->mtx) {
+ enif_mutex_lock(pdata->mtx);
+ assert(!pdata->halting);
+ pdata->halting = !0;
+ enif_cond_broadcast(pdata->cnd);
+ enif_mutex_unlock(pdata->mtx);
+ }
+ res = fn_write_ok(pdata->filename);
+ assert(res == 0);
+}
 
 static ErlNifFunc nif_funcs[] =
 {
@@ -484,6 +755,14 @@ static ErlNifFunc nif_funcs[] =
 {"whereis_send", 3, whereis_send, ERL_NIF_DIRTY_JOB_IO_BOUND},
 {"whereis_term", 2, whereis_term, ERL_NIF_DIRTY_JOB_CPU_BOUND},
 {"dirty_terminating_literal_access", 2, dirty_terminating_literal_access, ERL_NIF_DIRTY_JOB_CPU_BOUND},
+ {"delay_halt_normal", 3, delay_halt, 0},
+ {"delay_halt_io_bound", 3, delay_halt, ERL_NIF_DIRTY_JOB_IO_BOUND},
+ {"delay_halt_cpu_bound", 3, delay_halt, ERL_NIF_DIRTY_JOB_CPU_BOUND},
+ {"sync_halt_io_bound", 2, sync_halt, ERL_NIF_DIRTY_JOB_IO_BOUND},
+ {"sync_halt_cpu_bound", 2, sync_halt, ERL_NIF_DIRTY_JOB_CPU_BOUND},
+ {"set_halt_option_from_nif_normal", 1, set_halt_option_from_nif, 0},
+ {"set_halt_option_from_nif_io_bound", 1, set_halt_option_from_nif, ERL_NIF_DIRTY_JOB_IO_BOUND},
+ {"set_halt_option_from_nif_cpu_bound", 1, set_halt_option_from_nif, ERL_NIF_DIRTY_JOB_CPU_BOUND}
 };
 
-ERL_NIF_INIT(dirty_nif_SUITE,nif_funcs,load,NULL,NULL,NULL)
+ERL_NIF_INIT(dirty_nif_SUITE,nif_funcs,load,NULL,upgrade,unload)
diff --git a/erts/emulator/test/dirty_nif_SUITE_data/on_halt_a.c b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_a.c
new file mode 100644
index 0000000000..73d50a2bf1
--- /dev/null
+++ b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_a.c
@@ -0,0 +1,23 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2022. 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%
+ */
+
+#include "on_halt_nif.c"
+
+ERL_NIF_INIT(on_halt_a,nif_funcs,load,NULL,NULL,unload)
diff --git a/erts/emulator/test/dirty_nif_SUITE_data/on_halt_b.c b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_b.c
new file mode 100644
index 0000000000..b9e13a17fa
--- /dev/null
+++ b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_b.c
@@ -0,0 +1,23 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2022. 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%
+ */
+
+#include "on_halt_nif.c"
+
+ERL_NIF_INIT(on_halt_b,nif_funcs,load,NULL,NULL,unload)
diff --git a/erts/emulator/test/dirty_nif_SUITE_data/on_halt_c.c b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_c.c
new file mode 100644
index 0000000000..db875e7f18
--- /dev/null
+++ b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_c.c
@@ -0,0 +1,23 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2022. 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%
+ */
+
+#include "on_halt_nif.c"
+
+ERL_NIF_INIT(on_halt_c,nif_funcs,load,NULL,NULL,unload)
diff --git a/erts/emulator/test/dirty_nif_SUITE_data/on_halt_d.c b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_d.c
new file mode 100644
index 0000000000..e3b64245ce
--- /dev/null
+++ b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_d.c
@@ -0,0 +1,23 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2022. 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%
+ */
+
+#include "on_halt_nif.c"
+
+ERL_NIF_INIT(on_halt_d,nif_funcs,load,NULL,NULL,unload)
diff --git a/erts/emulator/test/dirty_nif_SUITE_data/on_halt_e.c b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_e.c
new file mode 100644
index 0000000000..73357c9b9d
--- /dev/null
+++ b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_e.c
@@ -0,0 +1,23 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2022. 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%
+ */
+
+#include "on_halt_nif.c"
+
+ERL_NIF_INIT(on_halt_e,nif_funcs,load,NULL,NULL,unload)
diff --git a/erts/emulator/test/dirty_nif_SUITE_data/on_halt_f.c b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_f.c
new file mode 100644
index 0000000000..58b4955d4f
--- /dev/null
+++ b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_f.c
@@ -0,0 +1,23 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2022. 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%
+ */
+
+#include "on_halt_nif.c"
+
+ERL_NIF_INIT(on_halt_f,nif_funcs,load,NULL,NULL,unload)
diff --git a/erts/emulator/test/dirty_nif_SUITE_data/on_halt_nif.c b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_nif.c
new file mode 100644
index 0000000000..610b80d3f7
--- /dev/null
+++ b/erts/emulator/test/dirty_nif_SUITE_data/on_halt_nif.c
@@ -0,0 +1,96 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2022. 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%
+ */
+#include "erl_nif.h"
+#include <errno.h>
+#include <assert.h>
+#ifdef __WIN32__
+#include <windows.h>
+#else
+#include <unistd.h>
+#endif
+#include <stdio.h>
+#include <string.h>
+
+
+static int fn_write_ok(char *filename)
+{
+ FILE *file = fopen(filename, "w");
+ if (!file)
+ return EINVAL;
+ if (1 != fwrite("ok", 2, 1, file))
+ return EINVAL;
+ fclose(file);
+ return 0;
+}
+
+static void on_halt(void *priv_data)
+{
+ int res;
+#ifdef __WIN32__
+ Sleep(1000);
+#else
+ sleep(1);
+#endif
+ assert(priv_data);
+ res = fn_write_ok((char *) priv_data);
+ assert(res == 0);
+}
+
+static void unload(ErlNifEnv *env, void *priv_data)
+{
+ if (priv_data)
+ enif_free(priv_data);
+}
+
+static int load(ErlNifEnv* env, void** priv_data, ERL_NIF_TERM load_info)
+{
+ unsigned filename_len;
+ char *filename;
+ if (0 != enif_set_option(env, ERL_NIF_OPT_ON_HALT, on_halt))
+ return __LINE__;
+ if (!enif_get_list_length(env, load_info, &filename_len))
+ return __LINE__;
+ if (filename_len == 0)
+ return __LINE__;
+ filename_len++;
+ filename = enif_alloc(filename_len);
+ if (!filename)
+ return __LINE__;
+ if (filename_len != enif_get_string(env,
+ load_info,
+ filename,
+ filename_len,
+ ERL_NIF_LATIN1)) {
+ enif_free(filename);
+ return __LINE__;
+ }
+ *priv_data = (void *) filename;
+ return 0;
+}
+
+static ERL_NIF_TERM lib_loaded(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{
+ return enif_make_atom(env, "true");
+}
+
+static ErlNifFunc nif_funcs[] =
+{
+ {"lib_loaded", 0, lib_loaded}
+};
diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl
index 470f861e08..84125f139a 100644
--- a/erts/preloaded/src/erlang.erl
+++ b/erts/preloaded/src/erlang.erl
@@ -1204,8 +1204,13 @@ halt() ->
 
 %% halt/1
 %% Shadowed by erl_bif_types: erlang:halt/1
--spec halt(Status) -> no_return() when
- Status :: non_neg_integer() | 'abort' | string().
+-spec halt(Status :: non_neg_integer()) ->
+ no_return();
+ (Abort :: abort) ->
+ no_return();
+ (CrashDumpSlogan :: string()) ->
+ no_return().
+
 -dialyzer({no_return, halt/1}).
 halt(Status) ->
 try
@@ -1216,11 +1221,18 @@ halt(Status) ->
 
 %% halt/2
 %% Shadowed by erl_bif_types: erlang:halt/2
--spec halt(Status, Options) -> no_return() when
- Status :: non_neg_integer() | 'abort' | string(),
- Options :: [Option],
- Option :: {flush, boolean()}.
-halt(_Status, _Options) ->
+-type halt_options() ::
+ [{flush, boolean()}].
+
+-spec halt(Status :: non_neg_integer(), Options :: halt_options()) ->
+ no_return();
+ (Abort :: abort, Options :: halt_options()) ->
+ no_return();
+ (CrashDumpSlogan :: string(), Options :: halt_options()) ->
+ no_return().
+
+-dialyzer({no_return, halt/2}).
+halt(_, _) ->
 erlang:nif_error(undefined).
 
 %% has_prepared_code_on_load/1
-- 
2.35.3

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File 4631-erts-On-halt-and-delayed-halt-support-for-NIFs.patch of Package erlang (Revision e2236faf8ce46a8c7652e4d3a503d1da)

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