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|
Patch Package: OTP 20.0
Git Tag: OTP-20.0
Date: 2017-06-21
Trouble Report Id: OTP-10289, OTP-11695, OTP-12148, OTP-12872,
OTP-13006, OTP-13529, OTP-13684, OTP-13690,
OTP-13692, OTP-13779, OTP-13794, OTP-13801,
OTP-13805, OTP-13806, OTP-13810, OTP-13820,
OTP-13827, OTP-13830, OTP-13831, OTP-13842,
OTP-13844, OTP-13856, OTP-13860, OTP-13862,
OTP-13873, OTP-13879, OTP-13900, OTP-13903,
OTP-13908, OTP-13909, OTP-13921, OTP-13924,
OTP-13961, OTP-13968, OTP-13976, OTP-13983,
OTP-14000, OTP-14001, OTP-14002, OTP-14006,
OTP-14029, OTP-14035, OTP-14037, OTP-14038,
OTP-14039, OTP-14042, OTP-14057, OTP-14058,
OTP-14059, OTP-14066, OTP-14068, OTP-14069,
OTP-14070, OTP-14071, OTP-14072, OTP-14076,
OTP-14077, OTP-14087, OTP-14089, OTP-14092,
OTP-14094, OTP-14102, OTP-14110, OTP-14111,
OTP-14117, OTP-14123, OTP-14125, OTP-14127,
OTP-14137, OTP-14140, OTP-14146, OTP-14149,
OTP-14152, OTP-14168, OTP-14171, OTP-14178,
OTP-14179, OTP-14183, OTP-14186, OTP-14190,
OTP-14193, OTP-14197, OTP-14201, OTP-14205,
OTP-14216, OTP-14218, OTP-14219, OTP-14221,
OTP-14226, OTP-14238, OTP-14243, OTP-14245,
OTP-14247, OTP-14253, OTP-14255, OTP-14258,
OTP-14259, OTP-14261, OTP-14263, OTP-14264,
OTP-14267, OTP-14270, OTP-14272, OTP-14274,
OTP-14276, OTP-14277, OTP-14278, OTP-14284,
OTP-14285, OTP-14287, OTP-14289, OTP-14291,
OTP-14293, OTP-14294, OTP-14295, OTP-14296,
OTP-14302, OTP-14303, OTP-14304, OTP-14305,
OTP-14306, OTP-14307, OTP-14310, OTP-14312,
OTP-14314, OTP-14316, OTP-14317, OTP-14318,
OTP-14319, OTP-14323, OTP-14324, OTP-14328,
OTP-14330, OTP-14331, OTP-14332, OTP-14333,
OTP-14335, OTP-14336, OTP-14337, OTP-14338,
OTP-14339, OTP-14343, OTP-14345, OTP-14347,
OTP-14348, OTP-14352, OTP-14356, OTP-14357,
OTP-14360, OTP-14361, OTP-14362, OTP-14369,
OTP-14371, OTP-14377, OTP-14380, OTP-14381,
OTP-14382, OTP-14384, OTP-14385, OTP-14387,
OTP-14388, OTP-14390, OTP-14393, OTP-14394,
OTP-14399, OTP-14400, OTP-14401, OTP-14404,
OTP-14405, OTP-14407, OTP-14408, OTP-14409,
OTP-14410, OTP-14411, OTP-14415, OTP-14417,
OTP-14419, OTP-14421, OTP-14422, OTP-14423,
OTP-14424, OTP-14425, OTP-14426, OTP-14429,
OTP-14431, OTP-14433, OTP-14434, OTP-14435,
OTP-14436, OTP-14437, OTP-14438, OTP-14441,
OTP-14442, OTP-14443, OTP-14447, OTP-14453,
OTP-14454, OTP-14455, OTP-14531
Seq num: ERIERL-20, ERIERL-22, ERIERL-29, ERL-165,
ERL-208, ERL-278, ERL-308, ERL-332, ERL-360,
ERL-369, ERL-376, ERL-393, ERL-395, ERL-399,
ERL-401, ERL-417, ERL-429, ERL-430, ERL-82,
seq13299, seq13315
System: OTP
Release: 20
Application: asn1-5.0, common_test-1.15, compiler-7.1,
cosProperty-1.2.2, crypto-4.0,
debugger-4.2.2, dialyzer-3.2, diameter-2.0,
edoc-0.9, erl_docgen-0.7, erl_interface-3.10,
erts-9.0, eunit-2.3.3, hipe-3.16, inets-6.4,
jinterface-1.8, kernel-5.3, megaco-3.18.2,
mnesia-4.15, observer-2.4, orber-3.8.3,
parsetools-2.1.5, public_key-1.4.1,
reltool-0.7.4, runtime_tools-1.12,
sasl-3.0.4, snmp-5.2.6, ssh-4.5, ssl-8.2,
stdlib-3.4, syntax_tools-2.1.2, tools-2.10,
wx-1.8.1, xmerl-1.3.15
Predecessor: OTP
Check out the git tag OTP-20.0, and build a full OTP system including
documentation.
---------------------------------------------------------------------
--- HIGHLIGHTS ------------------------------------------------------
---------------------------------------------------------------------
OTP-10289 Application(s): stdlib
Related Id(s): OTP-10309
*** POTENTIAL INCOMPATIBILITY ***
Improved unicode support for strings. Added
normalization functions in the unicode module. Extended
the string module API with new functions with improved
unicode handling and that works on grapheme clusters.
The new functions operates on the unicode:chardata()
type, thus they also accept UTF-8 binaries as input.
The old string API have been marked as obsolete. The
return values have been changed for some error cases.
OTP-13820 Application(s): ssl
*** POTENTIAL INCOMPATIBILITY ***
TLS-1.2 clients will now always send hello messages on
its own format, as opposed to earlier versions that
will send the hello on the lowest supported version,
this is a change supported by the latest RFC.
This will make interoperability with some newer servers
smoother. Potentially, but unlikely, this could cause a
problem with older servers if they do not adhere to the
RFC and ignore unknown extensions.
OTP-13900 Application(s): crypto
The crypto application now supports OpenSSL 1.1.
OTP-13921 Application(s): crypto, ssl
Related Id(s): PR-1180
Allow Erlang/OTP to use OpenSSL in FIPS-140 mode, in
order to satisfy specific security requirements (mostly
by different parts of the US federal government).
See the new crypto users guide "FIPS mode" chapter
about building and using the FIPS support which is
disabled by default.
(Thanks to dszoboszlay and legoscia)
OTP-14059 Application(s): kernel, stdlib
Functions for detecting changed code has been added.
code:modified_modules/0 returns all currently loaded
modules that have changed on disk. code:module_status/1
returns the status for a module. In the shell and in c
module, mm/0 is short for code:modified_modules/0, and
lm/0 reloads all currently loaded modules that have
changed on disk.
OTP-14094 Application(s): stdlib
*** POTENTIAL INCOMPATIBILITY ***
Optimized ETS operations by changing table identifier
type from integer to reference. The reference enables a
more direct mapping to the table with less potential
lock contention and makes especially creation and
deletion of tables scale much better.
The change of the opaque type for the ETS table
identifiers may cause failure in code that make faulty
assumptions about this opaque type.
The number of tables stored at one Erlang node *used*
to be limited. This is no longer the case (except by
memory usage). The previous default limit was about
1400 tables and could be increased by setting the
environment variable ERL_MAX_ETS_TABLES before starting
the Erlang runtime system. This hard limit has been
removed, but it is currently useful to set the
ERL_MAX_ETS_TABLES anyway. It should be set to an
approximate of the maximum amount of tables used. This
since an internal table for named tables is sized using
this value. If large amounts of named tables are used
and ERL_MAX_ETS_TABLES hasn't been increased, the
performance of named table lookup will degrade.
OTP-14110 Application(s): ssh
*** POTENTIAL INCOMPATIBILITY ***
Modernization of key exchange algorithms. See
draft-ietf-curdle-ssh-kex-sha2 for a discussion.
Removed an outdated weak algorithm and added stronger
replacements to keep interoperability with other modern
ssh clients and servers. The default ordering of the
algorithms is also adjusted.
Retired: The nowadays unsecure key-exchange
diffie-hellman-group1-sha1 is not enabled by default,
but can be enabled with the option
preferred-algorithms.
Added: The new stronger key-exchange
diffie-hellman-group16-sha512,
diffie-hellman-group18-sha512 and
diffie-hellman-group14-sha256 are added and enabled by
default.
The questionable [RFC 6194] sha1-based algorithms
diffie-hellman-group-exchange-sha1 and
diffie-hellman-group14-sha1 are however still kept
enabled by default for compatibility with ancient
clients and servers that lack modern key-exchange
alternatives. When the draft-ietf-curdle-ssh-kex-sha2
becomes an rfc, those sha1-based algorithms and
diffie-hellman-group1-sha1 will be deprecated by IETF.
They might then be removed from the default list in
Erlang/OTP.
OTP-14152 Application(s): erts
*** POTENTIAL INCOMPATIBILITY ***
Dirty schedulers are now enabled and supported on
Erlang runtime systems with SMP support.
Besides support for dirty NIFs also support for dirty
BIFs and dirty garbage collection have been introduced.
All garbage collections that potentially will take a
long time to complete are now performed on dirty
schedulers if enabled.
erlang:statistics/1 with arguments inspecting scheduler
and run queue states have been changed due to the dirty
scheduler support. Code using this functionality may
have to be rewritten taking these incompatibilities
into consideration. Examples of such uses are calls to
erlang:statistics(scheduler_wall_time),
statistics(total_run_queue_lengths),
statistics(total_active_tasks), etc.
OTP-14178 Application(s): compiler, erts
Atoms may now contain arbitrary Unicode characters.
OTP-14183 Application(s): stdlib
gen_fsm is deprecated and is replaced by gen_statem,
however for backwards compatibility reasons gen_fsm may
continue to exist as an undocumented feature for quite
some time.
OTP-14193 Application(s): ssh
The Extension Negotiation Mechanism and the extension
server-sig-algs in draft-ietf-curdle-ssh-ext-info-05
are implemented.
The related draft-ietf-curdle-rsa-sha2-05 is
implemented and introduces the signature algorithms
rsa-sha2-256 and rsa-sha2-512.
OTP-14197 Application(s): ssl
TLS client processes will by default call
public_key:pkix_verify_hostname/2 to verify the
hostname of the connection with the server certificates
specified hostname during certificate path validation.
The user may explicitly disables it. Also if the
hostname can not be derived from the first argument to
connect or is not supplied by the server name
indication option, the check will not be performed.
OTP-14205 Application(s): erts
All uses of the magic binary kludge has been replaced
by uses of erlang references.
A magic binary was presented as an empty binary, but
actually referred other data internally in the Erlang
VM. Since they were presented as empty binaries,
different magic binaries compared as equal, and also
lost their internal data when passed out of an erlang
node.
The new usage of references has not got any of these
strange semantic issues, and the usage of these
references has been optimized to give the same
performance benefits as well as memory usage benefits
as magic binaries had.
A couple of examples of previous uses of magic binaries
are match specifications and NIF resources.
OTP-14219 Application(s): asn1
The new 'maps' option changes the representation of the
types SEQUENCE and SET to be maps (instead of records).
OTP-14226 Application(s): stdlib
erl_tar in previous versions of OTP only supports the
USTAR format. That limited path names to at most 255
bytes, and did not support Unicode characters in names
in a portable way.
erl_tar now has support for reading tar archives in the
formats currently in common use, such as v7, STAR,
USTAR, PAX, and GNU tar's extensions to the STAR/USTAR
format. When writing tar archives, erl_tar can now
write them in the PAX format if necessary (for example,
to support very long filenames or filenames with
Unicode characters). If possible, erl_tar will still
write tar archives in the USTAR for maximum
portability.
OTP-14291 Application(s): ssl
Extend connection_information/[1,2] . The values
session_id, master_secret, client_random and
server_random can no be accessed by
connection_information/2. Note only session_id will be
added to connection_information/1. The rational is that
values concerning the connection security should have
to be explicitly requested.
OTP-14319 Application(s): stdlib
Related Id(s): PR-1076
Add new function ets:select_replace/2 which performs
atomic "compare-and-swap" operations for ETS objects
using match specifications.
OTP-14331 Application(s): erts, stdlib
Related Id(s): ERL-208
*** POTENTIAL INCOMPATIBILITY ***
Upgraded the OTP internal PCRE library from version
8.33 to version 8.40. This library is used for
implementation of the re regular expressions module.
Besides various bug fixes, the new version allows for
better stack protection. In order to utilize this
feature, the stack size of normal scheduler threads is
now by default set to 128 kilo words on all platforms.
The stack size of normal scheduler threads can be set
upon system start by passing the +sss command line
argument to the erl command.
See http://pcre.org/original/changelog.txt for
information about changes made to PCRE between the
versions 8.33 and 8.40.
OTP-14356 Application(s): erts
Various improvements of timer management internally in
the VM. These improvements both reduced memory
consumption of timer wheels as well as reduce the
amount of work that has to be performed in order to
handle timers.
OTP-14388 Application(s): ssl
Basic support for DTLS that been tested together with
OpenSSL.
Test by providing the option {protocol, dtls} to the
ssl API functions connect and listen.
OTP-14407 Application(s): erts, otp
'./configure --enable-lock-counter' will enabling
building of an additional emulator that has support for
lock counting. (The option previously existed, but
would turn on lock counting in the default emulator
being built.) To start the lock-counting emulator, use
'erl -emu_type lcnt'.
On Windows, erl recognized the undocumented option
-debug for starting a debug-compiled emulator. That
option has been removed. Use 'erl -emu_type debug'
instead.
---------------------------------------------------------------------
--- POTENTIAL INCOMPATIBILITIES -------------------------------------
---------------------------------------------------------------------
OTP-10289 Application(s): stdlib
Related Id(s): OTP-10309
*** HIGHLIGHT ***
Improved unicode support for strings. Added
normalization functions in the unicode module. Extended
the string module API with new functions with improved
unicode handling and that works on grapheme clusters.
The new functions operates on the unicode:chardata()
type, thus they also accept UTF-8 binaries as input.
The old string API have been marked as obsolete. The
return values have been changed for some error cases.
OTP-12872 Application(s): ssh
The internal handling of SSH options is re-written.
Previously there were no checks if a client option was
given to a daemon or vice versa. This is corrected now.
If your code has e.g. a client-only option in a call to
start a daemon, the call will fail.
OTP-13006 Application(s): kernel
Related Id(s): ERIERL-20, ERL-429
Function inet:ntoa/1 has been fixed to return lowercase
letters according to RFC 5935 that has been approved
after this function was written. Previously uppercase
letters were returned so this may be a backwards
incompatible change depending on how the returned
address string is used.
Function inet:parse_address/1 has been fixed to accept
%-suffixes on scoped addresses. The addresses does not
work yet, but gives no parse errors.
OTP-13820 Application(s): ssl
*** HIGHLIGHT ***
TLS-1.2 clients will now always send hello messages on
its own format, as opposed to earlier versions that
will send the hello on the lowest supported version,
this is a change supported by the latest RFC.
This will make interoperability with some newer servers
smoother. Potentially, but unlikely, this could cause a
problem with older servers if they do not adhere to the
RFC and ignore unknown extensions.
OTP-13827 Application(s): erts
Remove deprecated erlang:hash/2.
OTP-13844 Application(s): erts
Related Id(s): OTP-13833
The previously used purge strategy has been removed.
The optional purge strategy introduced in ERTS version
8.1 is now the only strategy available.
The new purge strategy is slightly incompatible with
the old strategy. Previously processes holding funs
that referred to the module being purged either failed
a soft purge, or was killed during a hard purge. The
new strategy completely ignores funs. If funs referring
to the code being purged exist, and are used after a
purge, an exception will be raised upon usage. That is,
the behavior will be exactly the same as the case when
a fun is received by a process after the purge.
For more information see the documentation of
erlang:check_process_code/3.
OTP-13873 Application(s): crypto
Removed functions deprecated in crypto-3.0 first
released in OTP-R16B01
OTP-13908 Application(s): erts
The NIF library reload feature is not supported
anymore. It has been marked as deprecated since OTP
R15B. This means that you are only allowed to do one
successful call to erlang:load_nif/2 for each module
instance. A second call to erlang:load_nif/2 will
return {error, {reload, _}} even if the NIF library
implements the reload callback.
Runtime upgrade of a NIF library is still supported by
using the Erlang module upgrade mechanics with a
current and an old module instance existing at the same
time with their corresponding NIF libraries.
OTP-14039 Application(s): mnesia
Removed the wrapping of select continuations in
extension plugin handling. This might require the user
to rewrite user backend plugin if used.
OTP-14094 Application(s): stdlib
*** HIGHLIGHT ***
Optimized ETS operations by changing table identifier
type from integer to reference. The reference enables a
more direct mapping to the table with less potential
lock contention and makes especially creation and
deletion of tables scale much better.
The change of the opaque type for the ETS table
identifiers may cause failure in code that make faulty
assumptions about this opaque type.
The number of tables stored at one Erlang node *used*
to be limited. This is no longer the case (except by
memory usage). The previous default limit was about
1400 tables and could be increased by setting the
environment variable ERL_MAX_ETS_TABLES before starting
the Erlang runtime system. This hard limit has been
removed, but it is currently useful to set the
ERL_MAX_ETS_TABLES anyway. It should be set to an
approximate of the maximum amount of tables used. This
since an internal table for named tables is sized using
this value. If large amounts of named tables are used
and ERL_MAX_ETS_TABLES hasn't been increased, the
performance of named table lookup will degrade.
OTP-14110 Application(s): ssh
*** HIGHLIGHT ***
Modernization of key exchange algorithms. See
draft-ietf-curdle-ssh-kex-sha2 for a discussion.
Removed an outdated weak algorithm and added stronger
replacements to keep interoperability with other modern
ssh clients and servers. The default ordering of the
algorithms is also adjusted.
Retired: The nowadays unsecure key-exchange
diffie-hellman-group1-sha1 is not enabled by default,
but can be enabled with the option
preferred-algorithms.
Added: The new stronger key-exchange
diffie-hellman-group16-sha512,
diffie-hellman-group18-sha512 and
diffie-hellman-group14-sha256 are added and enabled by
default.
The questionable [RFC 6194] sha1-based algorithms
diffie-hellman-group-exchange-sha1 and
diffie-hellman-group14-sha1 are however still kept
enabled by default for compatibility with ancient
clients and servers that lack modern key-exchange
alternatives. When the draft-ietf-curdle-ssh-kex-sha2
becomes an rfc, those sha1-based algorithms and
diffie-hellman-group1-sha1 will be deprecated by IETF.
They might then be removed from the default list in
Erlang/OTP.
OTP-14146 Application(s): asn1
The deprecated module asn1rt has been removed. The
deprecated functions asn1ct:encode/3 and
asn1ct:decode/3 have been removed. The undocumented
function asn1ct:encode/2 has been removed.
OTP-14152 Application(s): erts
*** HIGHLIGHT ***
Dirty schedulers are now enabled and supported on
Erlang runtime systems with SMP support.
Besides support for dirty NIFs also support for dirty
BIFs and dirty garbage collection have been introduced.
All garbage collections that potentially will take a
long time to complete are now performed on dirty
schedulers if enabled.
erlang:statistics/1 with arguments inspecting scheduler
and run queue states have been changed due to the dirty
scheduler support. Code using this functionality may
have to be rewritten taking these incompatibilities
into consideration. Examples of such uses are calls to
erlang:statistics(scheduler_wall_time),
statistics(total_run_queue_lengths),
statistics(total_active_tasks), etc.
OTP-14171 Application(s): crypto
Raised minimum requirement for OpenSSL version to
OpenSSL-0.9.8.c although we recommend a much higher
version, that is a version that is still maintained
officially by the OpenSSL project. Note that using such
an old version may restrict the crypto algorithms
supported.
OTP-14263 Application(s): ssh
Removed the option public_key_alg which was deprecated
in 18.2. Use pref_public_key_algs instead.
OTP-14264 Application(s): ssh
The SSH application is refactored regarding daemon
starting. The resolution of contradicting Host argument
and ip option were not described. There were also
strange corner cases when the 'any' value was used in
Host argument or ip option. This is (hopefully)
resolved now, but it may cause incompatibilities for
code using both Host and the ip option. The value
'loopback' has been added for a correct way of naming
those addresses.
OTP-14272 Application(s): erts, otp
The non-smp emulators have been deprecated and are
scheduled for removal in OTP-21.
In preparation for this, the threaded non-smp emulator
is no longer built by default and has to be enabled
using the --enable-plain-emulator to configure.
OTP-14331 Application(s): erts, stdlib
Related Id(s): ERL-208
*** HIGHLIGHT ***
Upgraded the OTP internal PCRE library from version
8.33 to version 8.40. This library is used for
implementation of the re regular expressions module.
Besides various bug fixes, the new version allows for
better stack protection. In order to utilize this
feature, the stack size of normal scheduler threads is
now by default set to 128 kilo words on all platforms.
The stack size of normal scheduler threads can be set
upon system start by passing the +sss command line
argument to the erl command.
See http://pcre.org/original/changelog.txt for
information about changes made to PCRE between the
versions 8.33 and 8.40.
OTP-14343 Application(s): diameter
Improve performance of message encode/decode and
related handling.
Dictionaries using @custom_types or @codecs will need
to adapt the corresponding functions to accept an
additional argument that is now passed through
encode/decode, which was required to remove various
process dictionary-based workarounds that have been
used to solve problems in the past.
OTP-14531 Application(s): stdlib
The state machine engine gen_statem can now handle
generic time-outs (multiple named) as well as absolute
time-out time. See the documentation.
The gen_statem callback Module:init/1 has become
mandatory to harmonize with other gen_* modules. This
may be an incompatibility for gen_statem callback
modules that use gen_statem:enter_loop/4-6.
---------------------------------------------------------------------
--- asn1-5.0 --------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14316 Application(s): asn1, crypto, runtime_tools
Related Id(s): PR-1390
Add compile option -compile(no_native) in modules with
on_load directive which is not yet supported by HiPE.
--- Improvements and New Features ---
OTP-13961 Application(s): asn1
The error tuple returned from the encode and decode
functions will now include the stack backtrace to make
it easier to understand what went wrong.
OTP-14146 Application(s): asn1
*** POTENTIAL INCOMPATIBILITY ***
The deprecated module asn1rt has been removed. The
deprecated functions asn1ct:encode/3 and
asn1ct:decode/3 have been removed. The undocumented
function asn1ct:encode/2 has been removed.
OTP-14219 Application(s): asn1
*** HIGHLIGHT ***
The new 'maps' option changes the representation of the
types SEQUENCE and SET to be maps (instead of records).
Full runtime dependencies of asn1-5.0: erts-7.0, kernel-3.0,
stdlib-2.0
---------------------------------------------------------------------
--- common_test-1.15 ------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14332 Application(s): common_test
Related Id(s): seq13299
Errors in the documentation for user HTML stylesheets
have been corrected.
OTP-14400 Application(s): common_test, snmp, stdlib
Internal code change: Calls to catch followed by a call
to erlang:get_stacktrace/0 has been rewritten to use
try instead of catch to make the code future-proof.
--- Improvements and New Features ---
OTP-13806 Application(s): common_test
The ct_slave modules now handle nodenames in the same
way as nodenames passed to -sname. That means
ct_slave:start('[email protected]'). will now work.
OTP-14179 Application(s): common_test
Added the new option, keep_logs. If setting the value
for this option to an integer, N, common_test will
remove all ct_run.* directories in the current log
directory, except the N newest.
OTP-14284 Application(s): common_test
The existing ct_netconfc:open/1,2 opens an SSH
connection with one SSH channel realizing one Netconf
session. To allow testing of multiple sessions over the
same SSH connection, the following functions are added
to ct_netconfc:
* connect/1,2 - establish an SSH connection *
disconnect/1 - close the given SSH connection *
session/1,2,3 - open an ssh channel on the given
connection and send 'hello' to start a Netconf session
OTP-14285 Application(s): common_test, debugger, edoc, observer,
parsetools, runtime_tools, sasl, stdlib, syntax_tools,
tools
Miscellaneous updates due to atoms containing arbitrary
Unicode characters.
OTP-14415 Application(s): common_test
Related Id(s): seq13315
The function ct_ssh:shell/2,3 is added.
Full runtime dependencies of common_test-1.15: compiler-6.0,
crypto-3.6, debugger-4.1, erts-7.0, inets-6.0, kernel-4.0,
observer-2.1, runtime_tools-1.8.16, sasl-2.4.2, snmp-5.1.2, ssh-4.0,
stdlib-2.5, syntax_tools-1.7, tools-2.8, xmerl-1.3.8
---------------------------------------------------------------------
--- compiler-7.1 ----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-13690 Application(s): compiler, stdlib
For many releases, it has been legal to override a BIF
with a local function having the same name. However,
calling a local function with the same name as guard
BIF as filter in a list comprehension was not allowed.
OTP-14408 Application(s): compiler
Related Id(s): ERL-417
compile:forms/2 would not return the module name as
documented when one of the options 'from_core',
'from_asm', or 'from_beam' was given. Also, the
compiler would crash if one of those options was
combined with 'native'.
--- Improvements and New Features ---
OTP-12148 Application(s): compiler, erts
Optimized test for tuples with an atom as first
element.
OTP-13794 Application(s): compiler
Compilation of modules with huge literal binary strings
is now much faster.
OTP-13831 Application(s): compiler, erts, hipe, kernel, percept,
stdlib
Related Id(s): OTP-13735
Replaced usage of deprecated symbolic time unit
representations.
OTP-13856 Application(s): compiler
The undocumented and unsupported module sys_pre_expand
has been removed. As a partial replacement for the
functionality, there is a new function
erl_internal:add_predefined_functions/1 and
erl_expand_records will now add a module prefix to
calls to BIFs and imported functions.
OTP-13924 Application(s): compiler
The internal compiler passes now start all generated
variables with "@" to avoid any conflicts with
variables in languages such as Elixir or LFE.
OTP-14000 Application(s): compiler, erts, stdlib
The function fmod/2 has been added to the math module.
OTP-14042 Application(s): compiler
Code generation for complicated guards have been
improved.
OTP-14058 Application(s): compiler
The compiler has new warnings for repeated identical
map keys.
A map expression such as,
#{'a' => 1, 'b' => 2, 'a' => 3}.
will produce a warning for the repeated key 'a'.
OTP-14071 Application(s): compiler, stdlib
By default, there will now be a warning when export_all
is used. The warning can be disabled using
nowarn_export_all.
OTP-14072 Application(s): compiler
Optimize maps pattern matching by only examining the
common keys in each clause first instead of all keys.
This will reduce the number of lookups of each key in
maps pattern matching.
OTP-14087 Application(s): compiler
There is a new 'deterministic' option to omit 'source'
and 'options' tuples in the BEAM file.
OTP-14125 Application(s): compiler, dialyzer
Related Id(s): ERL-308
Analyzing modules with binary construction with huge
strings is now much faster. The compiler also compiles
such modules slightly faster.
OTP-14178 Application(s): compiler, erts
*** HIGHLIGHT ***
Atoms may now contain arbitrary Unicode characters.
OTP-14221 Application(s): compiler
compile:file/2 now accepts the option extra_chunks to
include extra chunks in the BEAM file.
OTP-14369 Application(s): compiler, dialyzer, stdlib
Related Id(s): PR-1367
The format of debug information that is stored in BEAM
files (when debug_info is used) has been changed. The
purpose of the change is to better support other
BEAM-based languages such as Elixir or LFE.
All tools included in OTP (dialyzer, debugger, cover,
and so on) will handle both the new format and the
previous format. Tools that retrieve the debug
information using beam_lib:chunk(Beam, [abstract_code])
will continue to work with both the new and old format.
Tools that call beam_lib:chunk(Beam, ["Abst"]) will not
work with the new format.
For more information, see the description of debug_info
in the documentation for beam_lib and the description
of the {debug_info,{Backend,Data}} option in the
documentation for compile.
OTP-14401 Application(s): compiler
In a future release, erlang:get_stacktrace/0 will
probably only work when called from within a 'try'
expression (otherwise it will return [].
To help prepare for that change, the compiler will now
by default warn if 'get_stacktrace/0' is used in a way
that will not work in the future. Note that the warning
will not be issued if 'get_stacktrace/0' is used in a
function that uses neither 'catch' nor 'try' (because
that could be a legal use if the function is called
from within a 'try'.
Full runtime dependencies of compiler-7.1: crypto-3.6, erts-9.0,
hipe-3.12, kernel-4.0, stdlib-2.5
---------------------------------------------------------------------
--- cosProperty-1.2.2 -----------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14006 Application(s): cosProperty, orber
Fix dialyzer warnings in Orber and CosProperty.
Full runtime dependencies of cosProperty-1.2.2: erts-7.0, kernel-3.0,
mnesia-4.12, orber-3.6.27, stdlib-2.0
---------------------------------------------------------------------
--- crypto-4.0 ------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14247 Application(s): crypto
LibreSSL can now be used by the modernized crypto app.
OTP-14316 Application(s): asn1, crypto, runtime_tools
Related Id(s): PR-1390
Add compile option -compile(no_native) in modules with
on_load directive which is not yet supported by HiPE.
OTP-14435 Application(s): crypto
Related Id(s): OTP-14313, PR-1393, PR-1462
Fix a bug in aes cfb128 function introduced by the bug
fix in GitHub pull request #1393.
--- Improvements and New Features ---
OTP-13779 Application(s): crypto
Related Id(s): ERL-82, PR-1138
Add basic support for CMAC
OTP-13873 Application(s): crypto
*** POTENTIAL INCOMPATIBILITY ***
Removed functions deprecated in crypto-3.0 first
released in OTP-R16B01
OTP-13900 Application(s): crypto
*** HIGHLIGHT ***
The crypto application now supports OpenSSL 1.1.
OTP-13921 Application(s): crypto, ssl
Related Id(s): PR-1180
*** HIGHLIGHT ***
Allow Erlang/OTP to use OpenSSL in FIPS-140 mode, in
order to satisfy specific security requirements (mostly
by different parts of the US federal government).
See the new crypto users guide "FIPS mode" chapter
about building and using the FIPS support which is
disabled by default.
(Thanks to dszoboszlay and legoscia)
OTP-14092 Application(s): crypto
Related Id(s): PR-1291
Crypto chacha20-poly1305 as in RFC 7539 enabled for
OpenSSL >= 1.1.
Thanks to mururu.
OTP-14140 Application(s): crypto
Related Id(s): ERL-165, PR-1299
RSA key generation added to crypto:generate_key/2.
Thanks to wiml.
An interface is also added to
public_key:generate_key/1.
OTP-14171 Application(s): crypto
*** POTENTIAL INCOMPATIBILITY ***
Raised minimum requirement for OpenSSL version to
OpenSSL-0.9.8.c although we recommend a much higher
version, that is a version that is still maintained
officially by the OpenSSL project. Note that using such
an old version may restrict the crypto algorithms
supported.
OTP-14274 Application(s): crypto
Deprecate crypto:rand_uniform/2 as it is not
cryptographically strong
OTP-14317 Application(s): crypto, stdlib
Related Id(s): PR-1372
The Crypto application now supports generation of
cryptographically strong random numbers (floats < 1.0
and integer arbitrary ranges) as a plugin to the 'rand'
module.
OTP-14436 Application(s): crypto
Related Id(s): PR-1396
This replaces the hard coded test values for AES, CMAC
and GCM ciphers with the full validation set from
NIST's CAVP program.
Full runtime dependencies of crypto-4.0: erts-9.0, kernel-5.3,
stdlib-3.4
---------------------------------------------------------------------
--- debugger-4.2.2 --------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14296 Application(s): debugger, stdlib
The Erlang shell, qlc:string_to_handle(), and the
Debugger (the Evaluator area and Edit variable window
of the Bindings area) can parse pids, ports,
references, and external funs, as long as they can be
created in the running system.
OTP-14318 Application(s): debugger
Fix editing of simple binary values in the Bindings
area of the Debugger's Attach Process Window.
--- Improvements and New Features ---
OTP-14285 Application(s): common_test, debugger, edoc, observer,
parsetools, runtime_tools, sasl, stdlib, syntax_tools,
tools
Miscellaneous updates due to atoms containing arbitrary
Unicode characters.
Full runtime dependencies of debugger-4.2.2: compiler-5.0, erts-6.0,
kernel-3.0, stdlib-2.5, wx-1.2
---------------------------------------------------------------------
--- dialyzer-3.2 ----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14423 Application(s): dialyzer
Related Id(s): OTP-14323
The check of bad type variables in type declarations
was mistakingly removed in Erlang/OTP 18, and is now
re-introduced.
--- Improvements and New Features ---
OTP-14125 Application(s): compiler, dialyzer
Related Id(s): ERL-308
Analyzing modules with binary construction with huge
strings is now much faster. The compiler also compiles
such modules slightly faster.
OTP-14127 Application(s): dialyzer
The peak memory consumption is reduced.
OTP-14218 Application(s): dialyzer
Related Id(s): OTP-14127
Warnings about unknown types are now also generated for
types not used by any function specification.
OTP-14336 Application(s): dialyzer, otp
TypEr has been removed as separate application and is
now a part of the Dialyzer application. Documentation
for TypEr has been added in the Dialyzer application.
OTP-14369 Application(s): compiler, dialyzer, stdlib
Related Id(s): PR-1367
The format of debug information that is stored in BEAM
files (when debug_info is used) has been changed. The
purpose of the change is to better support other
BEAM-based languages such as Elixir or LFE.
All tools included in OTP (dialyzer, debugger, cover,
and so on) will handle both the new format and the
previous format. Tools that retrieve the debug
information using beam_lib:chunk(Beam, [abstract_code])
will continue to work with both the new and old format.
Tools that call beam_lib:chunk(Beam, ["Abst"]) will not
work with the new format.
For more information, see the description of debug_info
in the documentation for beam_lib and the description
of the {debug_info,{Backend,Data}} option in the
documentation for compile.
Full runtime dependencies of dialyzer-3.2: compiler-7.0, erts-8.0,
hipe-3.15.4, kernel-5.0, stdlib-3.0, syntax_tools-2.0, wx-1.2
---------------------------------------------------------------------
--- diameter-2.0 ----------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-14338 Application(s): diameter
Let candidate peers be passed to diameter:call/4
With call option peer, to allow a request to be sent to
a peer that hasn't advertised support for the
application in question.
RFC 6733 2.4 requires a node to send the application
identifiers of all locally supported applications at
capabilities exchange, but not all nodes respect this
for the common application, and diameter itself will
send D[WP][RA] without the common application having
been explicitly advertised. Regarding the common
application as implicit renders Result-Code 5010
(DIAMETER_NO_COMMON_APPLICATION) meaningless however,
so allow any request to be sent as long as there is a
configured dictionary to support it.
OTP-14343 Application(s): diameter
*** POTENTIAL INCOMPATIBILITY ***
Improve performance of message encode/decode and
related handling.
Dictionaries using @custom_types or @codecs will need
to adapt the corresponding functions to accept an
additional argument that is now passed through
encode/decode, which was required to remove various
process dictionary-based workarounds that have been
used to solve problems in the past.
OTP-14455 Application(s): diameter
Related Id(s): ERL-332
Add transport options to avoid deadlock and allow for
load regulation.
Both diameter_tcp and diameter_sctp now accept two new
configuration options: sender and message_cb. The
former causes outgoing sends to take place in a
dedicated process, to avoid the possibility of deadlock
when both the transport process and its peer block in
send. The latter allows a callback to control the
reading of messages on the socket, to allow for
backpressure towards peers when the rate of incoming
traffic is greater than can otherwise be handled.
Neither of these options are yet documented, but are
unlikely to change unless problems are discovered. The
sender option is not the default since it should
probably always be used in combination with message_cb,
to prevent incoming requests from being read at a
higher rate than a peer allows outgoing answers to be
sent.
Full runtime dependencies of diameter-2.0: erts-6.4, kernel-3.2,
ssl-6.0, stdlib-2.4
---------------------------------------------------------------------
--- edoc-0.9 --------------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-14277 Application(s): edoc
To support stable builds, edoc no longer includes time
stamps in the footer for generated files.
OTP-14285 Application(s): common_test, debugger, edoc, observer,
parsetools, runtime_tools, sasl, stdlib, syntax_tools,
tools
Miscellaneous updates due to atoms containing arbitrary
Unicode characters.
Full runtime dependencies of edoc-0.9: erts-6.0, inets-5.10,
kernel-3.0, stdlib-2.5, syntax_tools-1.6.14, xmerl-1.3.7
---------------------------------------------------------------------
--- erl_docgen-0.7 --------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14333 Application(s): erl_docgen
Related Id(s): ERL-393
Sort index of C functions alphabetically in the
sidebar.
OTP-14431 Application(s): erl_docgen
The right side index of functions now handle functions
with same name but different arity.
--- Improvements and New Features ---
OTP-14371 Application(s): erl_docgen
Related Id(s): PR-1215
Improvements in the OTP documentation style.
(Thanks to Mariano Guerra)
Full runtime dependencies of erl_docgen-0.7: edoc-0.7.13, erts-6.0,
stdlib-2.5, xmerl-1.3.7
---------------------------------------------------------------------
--- erl_interface-3.10 ----------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14310 Application(s): erl_interface, kernel
Fix bug where gethostname would incorrectly fail with
enametoolong on Linux.
--- Improvements and New Features ---
OTP-14337 Application(s): erl_interface, erts, jinterface
Remove generation of atoms in old latin1 external
format in the distribution between erlang nodes,
erl_interface, and jinterface. The new utf8 format for
atoms was introduced in OTP R16. An OTP 20 node can
therefore not connect to nodes older than R16.
Atoms that can be encoded using latin1 are still
encoded by term_to_binary() using latin1 encoding. Note
that all atoms will by default be encoded using utf8 in
a future Erlang/OTP release. For more information see
the documentation of erlang:term_to_binary/2.
---------------------------------------------------------------------
--- erts-9.0 --------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-13968 Application(s): erts
Fix various bugs regarding loading, upgrade and purge
of HiPE compiled code:
-- The native code memory for a purged module was never
deallocated.
-- Wrong functions could in some cases be called after
a module upgrade.
-- erlang:check_process_code did not check for
recursive calls made from native code.
OTP-14238 Application(s): erts, hipe
Hipe optional LLVM backend does require LLVM version
3.9 or later as older versions forced strong
dependencies on erts internals structures.
OTP-14255 Application(s): erts
Related Id(s): OTP-14400, OTP-14401
When an exception such as 'throw(HugeTerm)' was caught,
HugeTerm term would be kept in the process until the
next exception occurred, potentially increasing the
heap size for the process. That has been corrected.
OTP-14303 Application(s): erts
Slogans in crash dumps have been extended to print more
complex terms.
OTP-14304 Application(s): erts
Fixed bug when using enif_inspect_binary in combination
with enif_copy. In some circumstances the inspected
binary could be reallocated by the enif_copy call when
it shouldn't have been.
OTP-14305 Application(s): erts
The address family local (AF_UNIX / AF_LOCAL) now does
not ensure zero termination of Linux Abstract Addresses
so they can use all bytes.
OTP-14307 Application(s): erts
Related Id(s): PR-1379
Use -fno-PIE for Gentoo Hardened and others that don't
accept linker flag -no-pie.
OTP-14314 Application(s): erts
Related Id(s): ERL-369, PR-1394
Disable hipe for ppc64le architecture (little endian)
as it is not, and has never been, supported. It was
earlier equated with ppc64 (big endian) which lead to
broken build without --disable-hipe.
OTP-14324 Application(s): erts
Fix 'epmd -kill' to return a failure exit status code
if epmd was not killed because of some error.
OTP-14335 Application(s): erts
Fixed the following dirty scheduler related bugs:
-- the +SDPcpu command line argument could cause the
amount of dirty CPU schedulers to be set to zero
-- erlang:system_flag(multi_scheduling, _) failed when
only one normal scheduler was used together with dirty
scheduler support
OTP-14352 Application(s): erts
Fix erlexec to handle mismatch in sysconf and proc fs
when figuring out the cpu topology. This behaviour has
been seen when using docker together with
--cpuset-cpus.
OTP-14360 Application(s): erts
Related Id(s): ERL-401, PR-1417
Fixed memory segment cache used for multiblock
carriers. Huge (> 2GB) memory segments could cause a VM
crash. Creation of such huge memory segments used for
multiblock carriers is however very uncommon.
OTP-14390 Application(s): erts, kernel
Fix bug causing code:is_module_native to falsely return
true when local call trace is enabled for the module.
OTP-14411 Application(s): erts
Fix emulator crash when receive tracing on a
trace_delivered message.
OTP-14424 Application(s): erts
Fix file:sendfile error handling on SunOS when a
connection is closed during transmission.
OTP-14433 Application(s): erts
escript did not handle paths with spaces correct.
OTP-14437 Application(s): erts
Related Id(s): ERL-360
Fix erroneous lock check assertion when wx is run on
MacOS X.
OTP-14441 Application(s): erts
Related Id(s): ERL-430
Active-mode TCP sockets are now cleaned up properly on
send/shutdown errors.
OTP-14447 Application(s): erts
Fix compilation of hipe_mkliterals when the LIBS
configure variable had to be set.
--- Improvements and New Features ---
OTP-11695 Application(s): erts
Added erlang:garbage_collect/2 that takes an option
list as the last argument that can be used to control
whether a minor or a major garbage collection is to be
done. Doing a minor collection only collects terms that
have recently died, but is cheaper than a major
collection.
OTP-12148 Application(s): compiler, erts
Optimized test for tuples with an atom as first
element.
OTP-13529 Application(s): erts
Erlang literals are no longer copied during process to
process messaging.
OTP-13684 Application(s): erts
Add support in the erl_nif API for asynchronous message
notifications when sockets or other file descriptors
are ready to accept read or write operations. The
following functions have been added:
-- enif_select
-- enif_monitor_process
-- enif_demonitor_process
-- enif_compare_monitors
-- enif_open_resource_type_x
OTP-13692 Application(s): erts, stdlib
There are two new guard BIFs 'floor/1' and 'ceil/1'.
They both return integers. In the 'math' module, there
are two new BIFs with the same names that return
floating point values.
OTP-13827 Application(s): erts
*** POTENTIAL INCOMPATIBILITY ***
Remove deprecated erlang:hash/2.
OTP-13831 Application(s): compiler, erts, hipe, kernel, percept,
stdlib
Related Id(s): OTP-13735
Replaced usage of deprecated symbolic time unit
representations.
OTP-13842 Application(s): erts
Added support in zlib for extraction of the inflation
dictionary.
OTP-13844 Application(s): erts
Related Id(s): OTP-13833
*** POTENTIAL INCOMPATIBILITY ***
The previously used purge strategy has been removed.
The optional purge strategy introduced in ERTS version
8.1 is now the only strategy available.
The new purge strategy is slightly incompatible with
the old strategy. Previously processes holding funs
that referred to the module being purged either failed
a soft purge, or was killed during a hard purge. The
new strategy completely ignores funs. If funs referring
to the code being purged exist, and are used after a
purge, an exception will be raised upon usage. That is,
the behavior will be exactly the same as the case when
a fun is received by a process after the purge.
For more information see the documentation of
erlang:check_process_code/3.
OTP-13860 Application(s): erts
Dirty schedulers are now enabled by default when the
runtime system is built with SMP support.
OTP-13903 Application(s): erts
Improved ETS lookup/insert/delete speed for large set,
bag and duplicate_bag by a significant reduction of the
hash load factor. This speed improvement comes at the
expense of less than one word per table entry. Tables
with less than 256 entries are not affected at all.
OTP-13908 Application(s): erts
*** POTENTIAL INCOMPATIBILITY ***
The NIF library reload feature is not supported
anymore. It has been marked as deprecated since OTP
R15B. This means that you are only allowed to do one
successful call to erlang:load_nif/2 for each module
instance. A second call to erlang:load_nif/2 will
return {error, {reload, _}} even if the NIF library
implements the reload callback.
Runtime upgrade of a NIF library is still supported by
using the Erlang module upgrade mechanics with a
current and an old module instance existing at the same
time with their corresponding NIF libraries.
OTP-13976 Application(s): erts
Add erlang:system_info(atom_count) and
erlang:system_info(atom_limit) to provide a way to
retrieve the current and maximum number of atoms.
OTP-14000 Application(s): compiler, erts, stdlib
The function fmod/2 has been added to the math module.
OTP-14002 Application(s): erts
erlang:load_nif/2 returns new error type notsup when
called for a HiPE compiled module, which is not
supported.
OTP-14069 Application(s): erts
Add driver and nif lock instrumentation to lcnt
OTP-14149 Application(s): erts
Reduce memory pressure by converting sub-binaries to
heap-binaries when possible. This is done during
garbage collection.
OTP-14152 Application(s): erts
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
Dirty schedulers are now enabled and supported on
Erlang runtime systems with SMP support.
Besides support for dirty NIFs also support for dirty
BIFs and dirty garbage collection have been introduced.
All garbage collections that potentially will take a
long time to complete are now performed on dirty
schedulers if enabled.
erlang:statistics/1 with arguments inspecting scheduler
and run queue states have been changed due to the dirty
scheduler support. Code using this functionality may
have to be rewritten taking these incompatibilities
into consideration. Examples of such uses are calls to
erlang:statistics(scheduler_wall_time),
statistics(total_run_queue_lengths),
statistics(total_active_tasks), etc.
OTP-14178 Application(s): compiler, erts
*** HIGHLIGHT ***
Atoms may now contain arbitrary Unicode characters.
OTP-14186 Application(s): erts, kernel
Introduce an event manager in Erlang to handle OS
signals. A subset of OS signals may be subscribed to
and those are described in the Kernel application.
OTP-14201 Application(s): erts
Related Id(s): PR-1293
The escript program now handles symbolic links to
escripts.
This is useful for standalone systems with escripts
residing on a bin directory not included in the
execution path (as it may cause their erl program(s) to
override the desired one). Instead the escripts can be
referred to via symbolic links from a bin directory in
the path.
OTP-14205 Application(s): erts
*** HIGHLIGHT ***
All uses of the magic binary kludge has been replaced
by uses of erlang references.
A magic binary was presented as an empty binary, but
actually referred other data internally in the Erlang
VM. Since they were presented as empty binaries,
different magic binaries compared as equal, and also
lost their internal data when passed out of an erlang
node.
The new usage of references has not got any of these
strange semantic issues, and the usage of these
references has been optimized to give the same
performance benefits as well as memory usage benefits
as magic binaries had.
A couple of examples of previous uses of magic binaries
are match specifications and NIF resources.
OTP-14272 Application(s): erts, otp
*** POTENTIAL INCOMPATIBILITY ***
The non-smp emulators have been deprecated and are
scheduled for removal in OTP-21.
In preparation for this, the threaded non-smp emulator
is no longer built by default and has to be enabled
using the --enable-plain-emulator to configure.
OTP-14330 Application(s): erts, hipe
Related Id(s): PR-1397
Allow HiPE to run on VM built with --enable-m32-build.
OTP-14331 Application(s): erts, stdlib
Related Id(s): ERL-208
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
Upgraded the OTP internal PCRE library from version
8.33 to version 8.40. This library is used for
implementation of the re regular expressions module.
Besides various bug fixes, the new version allows for
better stack protection. In order to utilize this
feature, the stack size of normal scheduler threads is
now by default set to 128 kilo words on all platforms.
The stack size of normal scheduler threads can be set
upon system start by passing the +sss command line
argument to the erl command.
See http://pcre.org/original/changelog.txt for
information about changes made to PCRE between the
versions 8.33 and 8.40.
OTP-14337 Application(s): erl_interface, erts, jinterface
Remove generation of atoms in old latin1 external
format in the distribution between erlang nodes,
erl_interface, and jinterface. The new utf8 format for
atoms was introduced in OTP R16. An OTP 20 node can
therefore not connect to nodes older than R16.
Atoms that can be encoded using latin1 are still
encoded by term_to_binary() using latin1 encoding. Note
that all atoms will by default be encoded using utf8 in
a future Erlang/OTP release. For more information see
the documentation of erlang:term_to_binary/2.
OTP-14347 Application(s): erts, stdlib
Related Id(s): PR-1412
Added function re:version/0 which returns information
about the OTP internal PCRE version used for
implementation of the re module.
OTP-14348 Application(s): erts
Added new debug bif erlang:list_to_port/1.
OTP-14356 Application(s): erts
*** HIGHLIGHT ***
Various improvements of timer management internally in
the VM. These improvements both reduced memory
consumption of timer wheels as well as reduce the
amount of work that has to be performed in order to
handle timers.
OTP-14357 Application(s): erts, kernel, runtime_tools
Related Id(s): PR-1326
Sockets can now be bound to device (SO_BINDTODEVICE) on
platforms where it is supported.
This has been implemented e.g to support VRF-Lite under
Linux; see
VRF , and GitHub pull request #1326.
OTP-14380 Application(s): erts
Added the following erl command line arguments with
which you can set suggested stack for dirty schedulers:
-- +sssdcpu -- for dirty CPU schedulers
-- +sssdio -- for dirty IO schedulers
The default suggested stack size for dirty schedulers
is 40 kilo words.
OTP-14381 Application(s): erts
Changed erts startup program name, argv 0, to use the
environment variable ESCRIPT_NAME so that erlc,
dialyzer, typer, ct_run, or the escript name can be
seen with external programs, such as ps and htop
(depending on options), on unix.
OTP-14384 Application(s): erts
Related Id(s): OTP-14201
Improvements of escript documentation.
OTP-14385 Application(s): erts
Related Id(s): PR-1413
Add function enif_hash for NIFs to calculate hash
values of arbitrary terms.
OTP-14407 Application(s): erts, otp
*** HIGHLIGHT ***
'./configure --enable-lock-counter' will enabling
building of an additional emulator that has support for
lock counting. (The option previously existed, but
would turn on lock counting in the default emulator
being built.) To start the lock-counting emulator, use
'erl -emu_type lcnt'.
On Windows, erl recognized the undocumented option
-debug for starting a debug-compiled emulator. That
option has been removed. Use 'erl -emu_type debug'
instead.
OTP-14425 Application(s): erts, kernel
Warnings have been added to the relevant documentation
about not using un-secure distributed nodes in exposed
environments.
OTP-14434 Application(s): erts
Improvement of the documentation of the environment
variable ERL_CRASH_DUMP_SECONDS as well as the default
behavior when it is not set.
OTP-14438 Application(s): erts
Enabled off-heap message queue for some system
processes that might receive large amounts of messages.
OTP-14442 Application(s): erts
Related Id(s): ERIERL-22
ETS lock indexes have been replaced with the table name
in LCNT results.
OTP-14453 Application(s): erts
Related Id(s): PR-1400
Introduced the new functions enif_whereis_pid() and
enif_whereis_port().
Full runtime dependencies of erts-9.0: kernel-5.0, sasl-3.0.1,
stdlib-3.0
---------------------------------------------------------------------
--- eunit-2.3.3 -----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14287 Application(s): eunit
The surefire reports from eunit will no longer have
names with embedded double quotes.
Full runtime dependencies of eunit-2.3.3: erts-6.0, kernel-3.0,
stdlib-2.5
---------------------------------------------------------------------
--- hipe-3.16 -------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-13862 Application(s): hipe
Related Id(s): PR-1154
Fix hipe compiler flags o0 and o1 that have previously
been ignored by mistake.
OTP-13983 Application(s): hipe
Fix LLVM backend to not convert all remote calls to own
module, like ?MODULE:foo(), into local calls.
OTP-14238 Application(s): erts, hipe
Hipe optional LLVM backend does require LLVM version
3.9 or later as older versions forced strong
dependencies on erts internals structures.
OTP-14302 Application(s): hipe
Related Id(s): ERL-376, PR-1386
Fix a bug that has been seen causing failed loading of
hipe compiled modules on NetBSD due to unaligned data
pointers.
OTP-14306 Application(s): hipe
Related Id(s): ERL-278, PR-1392
Fix miscompilation bug in hipe that could cause wrong
function clause to be called from non-tail calls, where
the return value is unused, if the right function
clause is only reachable from those non-tail calls.
--- Improvements and New Features ---
OTP-13810 Application(s): hipe
Related Id(s): PR-1124
Improve hipe compilation time for large functions.
OTP-13831 Application(s): compiler, erts, hipe, kernel, percept,
stdlib
Related Id(s): OTP-13735
Replaced usage of deprecated symbolic time unit
representations.
OTP-13879 Application(s): hipe
Speed up hipe compile time register allocation for
larger function.
OTP-14261 Application(s): hipe
Related Id(s): PR-1360
Various code generation improvements.
OTP-14293 Application(s): hipe
Related Id(s): PR-1380
Improve hipe compiler to generate code with better CPU
register utilization at runtime by the use of 'Live
Range Splitting' techniques.
OTP-14330 Application(s): erts, hipe
Related Id(s): PR-1397
Allow HiPE to run on VM built with --enable-m32-build.
Full runtime dependencies of hipe-3.16: compiler-5.0, erts-9.0,
kernel-3.0, stdlib-2.5, syntax_tools-1.6.14
---------------------------------------------------------------------
--- inets-6.4 -------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14394 Application(s): inets
httpd_util:rfc1123_date/1 gracefully handle invalid DST
dates by returning the original time in the expected
rfc1123 format.
--- Improvements and New Features ---
OTP-14404 Application(s): inets
Add unicode binary support to http_uri functions
OTP-14429 Application(s): inets
httpc - Change timeout handling so the redirects cause
a new timer to be set. This means that a simple
redirected request could return after 2*timeout
milliseconds.
Full runtime dependencies of inets-6.4: erts-6.0, kernel-3.0,
mnesia-4.12, runtime_tools-1.8.14, ssl-5.3.4, stdlib-2.0
---------------------------------------------------------------------
--- jinterface-1.8 --------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-14337 Application(s): erl_interface, erts, jinterface
Remove generation of atoms in old latin1 external
format in the distribution between erlang nodes,
erl_interface, and jinterface. The new utf8 format for
atoms was introduced in OTP R16. An OTP 20 node can
therefore not connect to nodes older than R16.
Atoms that can be encoded using latin1 are still
encoded by term_to_binary() using latin1 encoding. Note
that all atoms will by default be encoded using utf8 in
a future Erlang/OTP release. For more information see
the documentation of erlang:term_to_binary/2.
---------------------------------------------------------------------
--- kernel-5.3 ------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-13006 Application(s): kernel
Related Id(s): ERIERL-20, ERL-429
*** POTENTIAL INCOMPATIBILITY ***
Function inet:ntoa/1 has been fixed to return lowercase
letters according to RFC 5935 that has been approved
after this function was written. Previously uppercase
letters were returned so this may be a backwards
incompatible change depending on how the returned
address string is used.
Function inet:parse_address/1 has been fixed to accept
%-suffixes on scoped addresses. The addresses does not
work yet, but gives no parse errors.
OTP-14310 Application(s): erl_interface, kernel
Fix bug where gethostname would incorrectly fail with
enametoolong on Linux.
OTP-14390 Application(s): erts, kernel
Fix bug causing code:is_module_native to falsely return
true when local call trace is enabled for the module.
OTP-14426 Application(s): kernel
Add early reject of invalid node names from distributed
nodes.
--- Improvements and New Features ---
OTP-13805 Application(s): kernel
Since Unicode is now allowed in atoms an extra check is
needed for node names, which are restricted to Latin-1.
OTP-13831 Application(s): compiler, erts, hipe, kernel, percept,
stdlib
Related Id(s): OTP-13735
Replaced usage of deprecated symbolic time unit
representations.
OTP-13909 Application(s): kernel
file:write_file(Name, Data, [raw]) would turn Data into
a single binary before writing. This meant it could not
take advantage of the writev() system call if it was
given a list of binaries and told to write with raw
mode.
OTP-14057 Application(s): kernel
Related Id(s): PR-1245
The performance of the disk_log has been somewhat
improved in some corner cases (big items), and the
documentation has been clarified.
OTP-14059 Application(s): kernel, stdlib
*** HIGHLIGHT ***
Functions for detecting changed code has been added.
code:modified_modules/0 returns all currently loaded
modules that have changed on disk. code:module_status/1
returns the status for a module. In the shell and in c
module, mm/0 is short for code:modified_modules/0, and
lm/0 reloads all currently loaded modules that have
changed on disk.
OTP-14186 Application(s): erts, kernel
Introduce an event manager in Erlang to handle OS
signals. A subset of OS signals may be subscribed to
and those are described in the Kernel application.
OTP-14357 Application(s): erts, kernel, runtime_tools
Related Id(s): PR-1326
Sockets can now be bound to device (SO_BINDTODEVICE) on
platforms where it is supported.
This has been implemented e.g to support VRF-Lite under
Linux; see
VRF , and GitHub pull request #1326.
OTP-14409 Application(s): kernel
Related Id(s): PR-1420
Added option to store shell_history on disk so that the
history can be reused between sessions.
OTP-14417 Application(s): kernel, stdlib
The size of crash reports created by gen_server,
gen_statem and proc_lib is limited with aid of the
Kernel application variable error_logger_format_depth.
The purpose is to limit the size of the messages sent
to the error_logger process when processes with huge
message queues or states crash.
The crash report generated by proc_lib includes the new
tag message_queue_len. The neighbour report also
includes the new tag current_stacktrace. Finally, the
neighbour report no longer includes the tags messages
and dictionary.
The new function error_logger:get_format_depth/0 can be
used to retrieve the value of the Kernel application
variable error_logger_format_depth.
OTP-14419 Application(s): kernel
One of the ETS tables used by the global module is
created with {read_concurrency, true} in order to
reduce contention.
OTP-14425 Application(s): erts, kernel
Warnings have been added to the relevant documentation
about not using un-secure distributed nodes in exposed
environments.
Full runtime dependencies of kernel-5.3: erts-9.0, sasl-3.0,
stdlib-3.0
---------------------------------------------------------------------
--- megaco-3.18.2 ---------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-14387 Application(s): megaco
Typos have been fixed.
Full runtime dependencies of megaco-3.18.2: asn1-3.0, debugger-4.0,
erts-7.0, et-1.5, kernel-3.0, runtime_tools-1.8.14, stdlib-2.5
---------------------------------------------------------------------
--- mnesia-4.15 -----------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-14039 Application(s): mnesia
*** POTENTIAL INCOMPATIBILITY ***
Removed the wrapping of select continuations in
extension plugin handling. This might require the user
to rewrite user backend plugin if used.
Full runtime dependencies of mnesia-4.15: erts-7.0, kernel-3.0,
stdlib-2.0
---------------------------------------------------------------------
--- observer-2.4 ----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14393 Application(s): observer
etop had a hardcoded timeout value of 1 second when
waiting for data from a remote node. When this expired,
which could happen for instance if there were very many
processes on the remote node, etop would exit with
reason connection_lost. To overcome this problem, the
timeout is now changed to be the same as the update
interval, which is configurable.
--- Improvements and New Features ---
OTP-14137 Application(s): observer
Show dirty-scheduler threads in performance monitor
graph and add a column with maximum allocated memory in
the Memory Allocators table.
OTP-14270 Application(s): observer
Keep table and port selection after refresh of tables.
Store settings before shutdown and restore when
starting application.
OTP-14285 Application(s): common_test, debugger, edoc, observer,
parsetools, runtime_tools, sasl, stdlib, syntax_tools,
tools
Miscellaneous updates due to atoms containing arbitrary
Unicode characters.
OTP-14345 Application(s): observer
Related Id(s): ERL-399
When observing a node older than OTP-19.0, a pop-up
will be displayed when trying to access port
information. Earlier, observer would crash in this
situation.
Full runtime dependencies of observer-2.4: erts-7.0, et-1.5,
inets-5.10, kernel-3.0, runtime_tools-1.8.14, stdlib-2.0, wx-1.2
---------------------------------------------------------------------
--- orber-3.8.3 -----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14006 Application(s): cosProperty, orber
Fix dialyzer warnings in Orber and CosProperty.
Full runtime dependencies of orber-3.8.3: erts-7.0, inets-5.10,
kernel-3.0, mnesia-4.12, ssl-5.3.4, stdlib-2.5
---------------------------------------------------------------------
--- parsetools-2.1.5 ------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14276 Application(s): parsetools
Related Id(s): PR-1357
Minor documentation fixes
--- Improvements and New Features ---
OTP-14285 Application(s): common_test, debugger, edoc, observer,
parsetools, runtime_tools, sasl, stdlib, syntax_tools,
tools
Miscellaneous updates due to atoms containing arbitrary
Unicode characters.
Full runtime dependencies of parsetools-2.1.5: erts-6.0, kernel-3.0,
stdlib-2.5
---------------------------------------------------------------------
--- public_key-1.4.1 ------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14258 Application(s): public_key
Bug for public_key:generate_key({namedCurve,OID})
fixed.
--- Improvements and New Features ---
OTP-14111 Application(s): public_key
Modernized internal representation used for crl
validation by use of maps.
OTP-14294 Application(s): public_key
Support EC key in pkix_sign/2
Full runtime dependencies of public_key-1.4.1: asn1-3.0, crypto-3.8,
erts-6.0, kernel-3.0, stdlib-2.0
---------------------------------------------------------------------
--- reltool-0.7.4 ---------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-14422 Application(s): reltool
Related Id(s): OTP-13830
The User's Guide examples are updated after removal of
support for Dets files created with Erlang/OTP R7 and
earlier.
Full runtime dependencies of reltool-0.7.4: erts-7.0, kernel-3.0,
sasl-2.4, stdlib-2.0, tools-2.6.14, wx-1.2
---------------------------------------------------------------------
--- runtime_tools-1.12 ----------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14316 Application(s): asn1, crypto, runtime_tools
Related Id(s): PR-1390
Add compile option -compile(no_native) in modules with
on_load directive which is not yet supported by HiPE.
--- Improvements and New Features ---
OTP-14285 Application(s): common_test, debugger, edoc, observer,
parsetools, runtime_tools, sasl, stdlib, syntax_tools,
tools
Miscellaneous updates due to atoms containing arbitrary
Unicode characters.
OTP-14357 Application(s): erts, kernel, runtime_tools
Related Id(s): PR-1326
Sockets can now be bound to device (SO_BINDTODEVICE) on
platforms where it is supported.
This has been implemented e.g to support VRF-Lite under
Linux; see
VRF , and GitHub pull request #1326.
Full runtime dependencies of runtime_tools-1.12: erts-8.0,
kernel-5.0, mnesia-4.12, stdlib-3.0
---------------------------------------------------------------------
--- sasl-3.0.4 ------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14029 Application(s): sasl
Documented default values for the 'mod' and
'start_phases' fields in .app files were not allowed as
actual values in a .app file. This is now corrected.
--- Improvements and New Features ---
OTP-14285 Application(s): common_test, debugger, edoc, observer,
parsetools, runtime_tools, sasl, stdlib, syntax_tools,
tools
Miscellaneous updates due to atoms containing arbitrary
Unicode characters.
Full runtime dependencies of sasl-3.0.4: erts-8.1, kernel-5.0,
stdlib-3.0, tools-2.6.14
---------------------------------------------------------------------
--- snmp-5.2.6 ------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14400 Application(s): common_test, snmp, stdlib
Internal code change: Calls to catch followed by a call
to erlang:get_stacktrace/0 has been rewritten to use
try instead of catch to make the code future-proof.
Full runtime dependencies of snmp-5.2.6: crypto-3.3, erts-6.0,
kernel-3.0, mnesia-4.12, runtime_tools-1.8.14, stdlib-2.5
---------------------------------------------------------------------
--- ssh-4.5 ---------------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-12872 Application(s): ssh
*** POTENTIAL INCOMPATIBILITY ***
The internal handling of SSH options is re-written.
Previously there were no checks if a client option was
given to a daemon or vice versa. This is corrected now.
If your code has e.g. a client-only option in a call to
start a daemon, the call will fail.
OTP-14110 Application(s): ssh
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
Modernization of key exchange algorithms. See
draft-ietf-curdle-ssh-kex-sha2 for a discussion.
Removed an outdated weak algorithm and added stronger
replacements to keep interoperability with other modern
ssh clients and servers. The default ordering of the
algorithms is also adjusted.
Retired: The nowadays unsecure key-exchange
diffie-hellman-group1-sha1 is not enabled by default,
but can be enabled with the option
preferred-algorithms.
Added: The new stronger key-exchange
diffie-hellman-group16-sha512,
diffie-hellman-group18-sha512 and
diffie-hellman-group14-sha256 are added and enabled by
default.
The questionable [RFC 6194] sha1-based algorithms
diffie-hellman-group-exchange-sha1 and
diffie-hellman-group14-sha1 are however still kept
enabled by default for compatibility with ancient
clients and servers that lack modern key-exchange
alternatives. When the draft-ietf-curdle-ssh-kex-sha2
becomes an rfc, those sha1-based algorithms and
diffie-hellman-group1-sha1 will be deprecated by IETF.
They might then be removed from the default list in
Erlang/OTP.
OTP-14117 Application(s): ssh
Modernized internal representation of sftp by use of
maps.
OTP-14193 Application(s): ssh
*** HIGHLIGHT ***
The Extension Negotiation Mechanism and the extension
server-sig-algs in draft-ietf-curdle-ssh-ext-info-05
are implemented.
The related draft-ietf-curdle-rsa-sha2-05 is
implemented and introduces the signature algorithms
rsa-sha2-256 and rsa-sha2-512.
OTP-14216 Application(s): ssh
The 'timeout' and 'connect_timeout' handling in
ssh_sftp:start_channel documentation is clarified.
OTP-14243 Application(s): ssh
The functions ssh:connect, ssh:shell and
ssh:start_channel now accept an IP-tuple as Host
destination argument.
OTP-14259 Application(s): ssh
The function ssh:daemon_info/1 now returns Host and
Profile as well as the Port info in the property list.
OTP-14263 Application(s): ssh
*** POTENTIAL INCOMPATIBILITY ***
Removed the option public_key_alg which was deprecated
in 18.2. Use pref_public_key_algs instead.
OTP-14264 Application(s): ssh
*** POTENTIAL INCOMPATIBILITY ***
The SSH application is refactored regarding daemon
starting. The resolution of contradicting Host argument
and ip option were not described. There were also
strange corner cases when the 'any' value was used in
Host argument or ip option. This is (hopefully)
resolved now, but it may cause incompatibilities for
code using both Host and the ip option. The value
'loopback' has been added for a correct way of naming
those addresses.
OTP-14267 Application(s): ssh
Related Id(s): OTP-14266
The supervisor code is refactored. The naming of
listening IP-Port-Profile triples are slightly changed
to improve consistency in strange corner cases as
resolved by OTP-14264
OTP-14312 Application(s): ssh
The idle_time option can now be used in daemons.
OTP-14361 Application(s): ssh
Added test cases for IETF-CURDLE Extension Negotiation
(ext-info)
OTP-14362 Application(s): ssh
Related Id(s): OTP-14361
Testcases for IETF-CURDLE extension server-sig-algs
including rsa-sha2-*
OTP-14399 Application(s): ssh
The option auth_methods can now also be used in clients
to select which authentication options that are used
and in which order.
OTP-14410 Application(s): ssh
Checks that a ECDSA public key (ecdsa-sha2-nistp*)
stored in a file has the correct size.
Full runtime dependencies of ssh-4.5: crypto-3.7.3, erts-6.0,
kernel-3.0, public_key-1.4, stdlib-3.3
---------------------------------------------------------------------
--- ssl-8.2 ---------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14421 Application(s): ssl
ECDH-ECDSA key exchange supported, was accidently
dismissed in earlier versions.
OTP-14443 Application(s): ssl
Correct close semantics for active once connections.
This was a timing dependent bug the resulted in the
close message not always reaching the ssl user process.
--- Improvements and New Features ---
OTP-13820 Application(s): ssl
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
TLS-1.2 clients will now always send hello messages on
its own format, as opposed to earlier versions that
will send the hello on the lowest supported version,
this is a change supported by the latest RFC.
This will make interoperability with some newer servers
smoother. Potentially, but unlikely, this could cause a
problem with older servers if they do not adhere to the
RFC and ignore unknown extensions.
OTP-13921 Application(s): crypto, ssl
Related Id(s): PR-1180
*** HIGHLIGHT ***
Allow Erlang/OTP to use OpenSSL in FIPS-140 mode, in
order to satisfy specific security requirements (mostly
by different parts of the US federal government).
See the new crypto users guide "FIPS mode" chapter
about building and using the FIPS support which is
disabled by default.
(Thanks to dszoboszlay and legoscia)
OTP-14076 Application(s): ssl
Implemented DTLS cookie generation, required by spec,
instead of using a hardcoded value.
OTP-14077 Application(s): ssl
Implement sliding window replay protection of DTLS
records.
OTP-14197 Application(s): ssl
*** HIGHLIGHT ***
TLS client processes will by default call
public_key:pkix_verify_hostname/2 to verify the
hostname of the connection with the server certificates
specified hostname during certificate path validation.
The user may explicitly disables it. Also if the
hostname can not be derived from the first argument to
connect or is not supplied by the server name
indication option, the check will not be performed.
OTP-14291 Application(s): ssl
*** HIGHLIGHT ***
Extend connection_information/[1,2] . The values
session_id, master_secret, client_random and
server_random can no be accessed by
connection_information/2. Note only session_id will be
added to connection_information/1. The rational is that
values concerning the connection security should have
to be explicitly requested.
OTP-14382 Application(s): ssl
Chacha cipher suites are currently not tested enough to
be most preferred ones
OTP-14388 Application(s): ssl
*** HIGHLIGHT ***
Basic support for DTLS that been tested together with
OpenSSL.
Test by providing the option {protocol, dtls} to the
ssl API functions connect and listen.
Full runtime dependencies of ssl-8.2: crypto-3.3, erts-7.0,
inets-5.10.7, kernel-3.0, public_key-1.2, stdlib-3.2
---------------------------------------------------------------------
--- stdlib-3.4 ------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-13690 Application(s): compiler, stdlib
For many releases, it has been legal to override a BIF
with a local function having the same name. However,
calling a local function with the same name as guard
BIF as filter in a list comprehension was not allowed.
OTP-14295 Application(s): stdlib
Related Id(s): PR-1372
A new (default) pseudo-random number generator
algorithm Xoroshiro116+ has been implemented in the
rand module.
The old algorithm implementations had a number of flaws
so they are all deprecated, but corrected versions of
two of them have been added. See the documentation.
OTP-14296 Application(s): debugger, stdlib
The Erlang shell, qlc:string_to_handle(), and the
Debugger (the Evaluator area and Edit variable window
of the Bindings area) can parse pids, ports,
references, and external funs, as long as they can be
created in the running system.
OTP-14400 Application(s): common_test, snmp, stdlib
Internal code change: Calls to catch followed by a call
to erlang:get_stacktrace/0 has been rewritten to use
try instead of catch to make the code future-proof.
OTP-14454 Application(s): stdlib
Related Id(s): ERIERL-29
The ms_transform module, used by ets:fun2ms/1 and
dbg:fun2ms/1, evaluates constant arithmetic
expressions. This is necessary since the Erlang
compiler, which normally evaluates constant
expressions, does not recognize the format generated by
ms_transform.
OTP-14531 Application(s): stdlib
*** POTENTIAL INCOMPATIBILITY ***
The state machine engine gen_statem can now handle
generic time-outs (multiple named) as well as absolute
time-out time. See the documentation.
The gen_statem callback Module:init/1 has become
mandatory to harmonize with other gen_* modules. This
may be an incompatibility for gen_statem callback
modules that use gen_statem:enter_loop/4-6.
--- Improvements and New Features ---
OTP-10289 Application(s): stdlib
Related Id(s): OTP-10309
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
Improved unicode support for strings. Added
normalization functions in the unicode module. Extended
the string module API with new functions with improved
unicode handling and that works on grapheme clusters.
The new functions operates on the unicode:chardata()
type, thus they also accept UTF-8 binaries as input.
The old string API have been marked as obsolete. The
return values have been changed for some error cases.
OTP-13692 Application(s): erts, stdlib
There are two new guard BIFs 'floor/1' and 'ceil/1'.
They both return integers. In the 'math' module, there
are two new BIFs with the same names that return
floating point values.
OTP-13801 Application(s): stdlib
Making code_change, terminate and handle_info callbacks
optional in the OTP behaviours.
OTP-13830 Application(s): stdlib
The support for Dets files created with Erlang/OTP R7
and earlier is removed.
OTP-13831 Application(s): compiler, erts, hipe, kernel, percept,
stdlib
Related Id(s): OTP-13735
Replaced usage of deprecated symbolic time unit
representations.
OTP-14000 Application(s): compiler, erts, stdlib
The function fmod/2 has been added to the math module.
OTP-14001 Application(s): stdlib
The EXIT signals received from processes using proc_lib
now looks like EXIT signals from processes that were
spawned using spawn_link. In particular, that means
that the stack trace is now included in the EXIT signal
so that it can see where the process crashed.
OTP-14035 Application(s): stdlib
sets:add_element/2 is faster when adding an element
that is already present, and sets:del_element/2 is
faster when the element to be deleted is not present.
This optimization can make certain operations, such as
sets:union/2 with many overlapping elements, up to two
orders of magnitude faster.
OTP-14037 Application(s): stdlib
Related Id(s): PR-1233
Add information in doc about supervisor shutdown reason
when maximum restart frequency is reached.
OTP-14038 Application(s): stdlib
Related Id(s): PR-1235
Added rand:jump/[0|1] functions.
OTP-14059 Application(s): kernel, stdlib
*** HIGHLIGHT ***
Functions for detecting changed code has been added.
code:modified_modules/0 returns all currently loaded
modules that have changed on disk. code:module_status/1
returns the status for a module. In the shell and in c
module, mm/0 is short for code:modified_modules/0, and
lm/0 reloads all currently loaded modules that have
changed on disk.
OTP-14066 Application(s): stdlib
Each assert macro in assert.hrl now has a corresponding
version with an extra argument, for adding comments to
assertions. These can for example be printed as part of
error reports, to clarify the meaning of the check that
failed.
OTP-14068 Application(s): stdlib
error_logger_tty_h and error_logger_file_h now inserts
the node information for nonlocal messages before the
message itself instead of after, both for readability
and so as not to change the line termination property
at the end of the message.
OTP-14070 Application(s): stdlib
Related Id(s): PR-1214
The Erlang code linter checks for badly formed type
constraints.
OTP-14071 Application(s): compiler, stdlib
By default, there will now be a warning when export_all
is used. The warning can be disabled using
nowarn_export_all.
OTP-14089 Application(s): stdlib
When a gen_server process crashes, the stacktrace for
the client will be printed to facilitate debugging.
OTP-14094 Application(s): stdlib
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
Optimized ETS operations by changing table identifier
type from integer to reference. The reference enables a
more direct mapping to the table with less potential
lock contention and makes especially creation and
deletion of tables scale much better.
The change of the opaque type for the ETS table
identifiers may cause failure in code that make faulty
assumptions about this opaque type.
The number of tables stored at one Erlang node *used*
to be limited. This is no longer the case (except by
memory usage). The previous default limit was about
1400 tables and could be increased by setting the
environment variable ERL_MAX_ETS_TABLES before starting
the Erlang runtime system. This hard limit has been
removed, but it is currently useful to set the
ERL_MAX_ETS_TABLES anyway. It should be set to an
approximate of the maximum amount of tables used. This
since an internal table for named tables is sized using
this value. If large amounts of named tables are used
and ERL_MAX_ETS_TABLES hasn't been increased, the
performance of named table lookup will degrade.
OTP-14102 Application(s): stdlib
take/2 has been added to dict, orddict, and gb_trees.
take_any/2 has been added to gb_trees.
OTP-14123 Application(s): stdlib
Extend gen_event API to handle options as well.
OTP-14168 Application(s): stdlib
Related Id(s): PR-1289
Advice on how to tune the supervisor restart frequency
(intensity and period) is added to System Documentation
- Design Principles - Supervisor Behaviour.
OTP-14183 Application(s): stdlib
*** HIGHLIGHT ***
gen_fsm is deprecated and is replaced by gen_statem,
however for backwards compatibility reasons gen_fsm may
continue to exist as an undocumented feature for quite
some time.
OTP-14190 Application(s): stdlib
The shell functions c/1 and c/2 have been extended so
that if the argument is a module name instead of a file
name, it automatically locates the .beam file and the
corresponding source file, and then recompiles the
module using the same compiler options (plus any
options passed to c/2). If compilation fails, the old
beam file is preserved. Also adds c(Mod, Opts, Filter),
where the Filter argument allows you to remove old
compiler options before the new options are added.
New utility functions file_find/2/3 and
find_source/1/2/3 have been added to filelib.
OTP-14226 Application(s): stdlib
*** HIGHLIGHT ***
erl_tar in previous versions of OTP only supports the
USTAR format. That limited path names to at most 255
bytes, and did not support Unicode characters in names
in a portable way.
erl_tar now has support for reading tar archives in the
formats currently in common use, such as v7, STAR,
USTAR, PAX, and GNU tar's extensions to the STAR/USTAR
format. When writing tar archives, erl_tar can now
write them in the PAX format if necessary (for example,
to support very long filenames or filenames with
Unicode characters). If possible, erl_tar will still
write tar archives in the USTAR for maximum
portability.
OTP-14245 Application(s): stdlib
base64:mime_decode/1 has been optimized so that it is
now almost as fast asbase64:decode/1; it used be
noticeably slower.
OTP-14278 Application(s): stdlib
erl_tar will now strip any leading '/' from pathnames
when extracting files from a tar archive and write a
message to the error logger. There is also new check
for directory traversal attacks; if a relative path
points above the current working directory the
extraction will be aborted.
OTP-14285 Application(s): common_test, debugger, edoc, observer,
parsetools, runtime_tools, sasl, stdlib, syntax_tools,
tools
Miscellaneous updates due to atoms containing arbitrary
Unicode characters.
OTP-14317 Application(s): crypto, stdlib
Related Id(s): PR-1372
The Crypto application now supports generation of
cryptographically strong random numbers (floats < 1.0
and integer arbitrary ranges) as a plugin to the 'rand'
module.
OTP-14319 Application(s): stdlib
Related Id(s): PR-1076
*** HIGHLIGHT ***
Add new function ets:select_replace/2 which performs
atomic "compare-and-swap" operations for ETS objects
using match specifications.
OTP-14323 Application(s): stdlib
The Erlang code linter checks for bad dialyzer
attributes. It also checks for bad type variables in
type declarations.
OTP-14328 Application(s): stdlib
Related Id(s): PR-1382
Two new functions has been implemented in the rand
module; normal/2 and normal_s/3, that both produce
normal distribution (pseudo) random numbers with mean
value and variance according to arguments.
OTP-14331 Application(s): erts, stdlib
Related Id(s): ERL-208
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
Upgraded the OTP internal PCRE library from version
8.33 to version 8.40. This library is used for
implementation of the re regular expressions module.
Besides various bug fixes, the new version allows for
better stack protection. In order to utilize this
feature, the stack size of normal scheduler threads is
now by default set to 128 kilo words on all platforms.
The stack size of normal scheduler threads can be set
upon system start by passing the +sss command line
argument to the erl command.
See http://pcre.org/original/changelog.txt for
information about changes made to PCRE between the
versions 8.33 and 8.40.
OTP-14347 Application(s): erts, stdlib
Related Id(s): PR-1412
Added function re:version/0 which returns information
about the OTP internal PCRE version used for
implementation of the re module.
OTP-14369 Application(s): compiler, dialyzer, stdlib
Related Id(s): PR-1367
The format of debug information that is stored in BEAM
files (when debug_info is used) has been changed. The
purpose of the change is to better support other
BEAM-based languages such as Elixir or LFE.
All tools included in OTP (dialyzer, debugger, cover,
and so on) will handle both the new format and the
previous format. Tools that retrieve the debug
information using beam_lib:chunk(Beam, [abstract_code])
will continue to work with both the new and old format.
Tools that call beam_lib:chunk(Beam, ["Abst"]) will not
work with the new format.
For more information, see the description of debug_info
in the documentation for beam_lib and the description
of the {debug_info,{Backend,Data}} option in the
documentation for compile.
OTP-14405 Application(s): stdlib
Add option hibernate_after to gen_server, gen_statem
and gen_event. Also added to the deprecated gen_fsm
behaviour.
OTP-14417 Application(s): kernel, stdlib
The size of crash reports created by gen_server,
gen_statem and proc_lib is limited with aid of the
Kernel application variable error_logger_format_depth.
The purpose is to limit the size of the messages sent
to the error_logger process when processes with huge
message queues or states crash.
The crash report generated by proc_lib includes the new
tag message_queue_len. The neighbour report also
includes the new tag current_stacktrace. Finally, the
neighbour report no longer includes the tags messages
and dictionary.
The new function error_logger:get_format_depth/0 can be
used to retrieve the value of the Kernel application
variable error_logger_format_depth.
Full runtime dependencies of stdlib-3.4: compiler-5.0, crypto-3.3,
erts-9.0, kernel-5.0, sasl-3.0
---------------------------------------------------------------------
--- syntax_tools-2.1.2 ----------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-14285 Application(s): common_test, debugger, edoc, observer,
parsetools, runtime_tools, sasl, stdlib, syntax_tools,
tools
Miscellaneous updates due to atoms containing arbitrary
Unicode characters.
Full runtime dependencies of syntax_tools-2.1.2: compiler-7.0,
erts-8.0, kernel-5.0, stdlib-3.0
---------------------------------------------------------------------
--- tools-2.10 ------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14339 Application(s): tools
Related Id(s): ERL-395
In some situations, make:all() and friends did not
detect changes in include files located in the current
directory. This is now corrected.
--- Improvements and New Features ---
OTP-14253 Application(s): tools
The make module now accepts the {emake,Emake} option.
OTP-14285 Application(s): common_test, debugger, edoc, observer,
parsetools, runtime_tools, sasl, stdlib, syntax_tools,
tools
Miscellaneous updates due to atoms containing arbitrary
Unicode characters.
Full runtime dependencies of tools-2.10: compiler-5.0, erts-7.0,
kernel-3.0, runtime_tools-1.8.14, stdlib-3.1
---------------------------------------------------------------------
--- wx-1.8.1 --------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14289 Application(s): wx
Fix a livelock that could be caused by wx:batch/1.
Full runtime dependencies of wx-1.8.1: erts-6.0, kernel-3.0,
stdlib-2.0
---------------------------------------------------------------------
--- xmerl-1.3.15 ----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14377 Application(s): xmerl
Related Id(s): PR-1369
Improves accumulator fun in xmerl_scan so that only one
#xmlText record is returned for strings which have
character references.
(Thanks to Jimmy Zöger)
Full runtime dependencies of xmerl-1.3.15: erts-6.0, kernel-3.0,
stdlib-2.5
---------------------------------------------------------------------
---------------------------------------------------------------------
---------------------------------------------------------------------
|
