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as it's not a public interface.
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Problem: erlang:purge_module/1 is not safe in the sense
that very bad things may happen if the code to be purged
is still referred to by live processes.
Introduce erts_internal:purge_module which is the same as the old
erlang:purge_module BIF (except it returns false if no such old module).
Implement erlang:purge_module in Erlang and let it invoke
erts_code_purger for safe purging where all clogging processes
first are killed.
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by moving code from code_server to erts_code_purger.
This is more or less a copy-paste from code_server.erl
to erts_code_purger.erl. All the inner mechanics of
code:purge/1 and code:soft_purge/1 are unchanged.
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as a system process with preloaded code.
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* maint:
Light weight statistics of run queue lengths
Conflicts:
erts/preloaded/ebin/erlang.beam
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- statistics(total_run_queue_lengths)
- statistics(run_queue_lengths)
- statistics(total_active_tasks)
- statistics(active_tasks)
Conflicts:
erts/emulator/beam/erl_process.c
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to support other terms, not just maps
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* np/sharing-preserved-copy/OTP-12590: (28 commits)
Refactor have seq_trace token test
Use sharing preserving copy error messages and exceptions
Use sharing preserving copy in enif_make_copy
Refactor sharing preserved copy flags
Fix rebase of SHCOPY seq_tokens
Fix erts_debug:copy_shared/1 prototype
Update preloaded module erlang.beam
Add erlang:copy_literals/2 spec
Add copy_literals testcase
Do not use GCC extensions in copy
Use copy literal range check in message passing and purging
Add BIF for setting internal copy literal range
Copy literals in copy sharing
Refactor copy sharing
Add support for HAMT maps in preserved copy
Fix Map preserved sharing copy implementation
Fix Halfword removal
Fix internal stacks
Add support for maps in preserved copy
Add --enable-sharing-preserving configure flag
...
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* rickard/ohmq/OTP-13047:
Fragmented young heap generation and off_heap_message_queue option
Refactor GC
Introduce literal tag
Conflicts:
erts/doc/src/erlang.xml
erts/emulator/beam/erl_gc.c
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* The youngest generation of the heap can now consist of multiple
blocks. Heap fragments and message fragments are added to the
youngest generation when needed without triggering a GC. After
a GC the youngest generation is contained in one single block.
* The off_heap_message_queue process flag has been added. When
enabled all message data in the queue is kept off heap. When
a message is selected from the queue, the message fragment (or
heap fragment) containing the actual message is attached to the
youngest generation. Messages stored off heap is not part of GC.
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On load handler process not being launched on a restart, NIF's
such as asn1rt_nif require it to be present for correct loading.
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Conflicts:
erts/preloaded/ebin/prim_inet.beam
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A new {line_delimiter, byte()} option allows line-oriented TCP-based
protocols to use a custom line delimiting character. It is to be
used in conjunction with {packet, line}.
This option also works with erlang:decode_packet/3 when its first argument
is 'line'.
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A new {line_delimiter, byte()} option allows line-oriented TCP-based protocols
to use a custom line delimiting character. It is to be used in conjunction
with {packet, line}.
This option also works with erlang:decode_packet/3 when its first argument
is 'line'.
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* rickard/io-bytes/OTP-12842:
Save IO bytes in scheduler specific data
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* nybek/fix_so_linger_zero__simple:
Update prim_inet.beam
Fix socket option {linger, {true, 0}} to abort TCP connections
Apply 'show_econnreset' socket option to send errors as well
Add 'show_econnreset' TCP socket option
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* rickard/time_api/OTP-11997:
Misc fixes
Conflicts:
erts/preloaded/ebin/erlang.beam
erts/preloaded/ebin/erts_internal.beam
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* rickard/time_api/OTP-11997:
Better OS system time implementation
Documentation adjustments
Fix zero timout timers
erts_sys_hrtime() for lcnt
Better support for poor os monotonic sources
Conflicts:
erts/preloaded/ebin/erlang.beam
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* rickard/time_api/OTP-11997: (22 commits)
Update primary bootstrap
inets: Suppress deprecated warning on erlang:now/0
inets: Cleanup of multiple copies of functions Add inets_lib with common functions used by multiple modules
inets: Update comments
Suppress deprecated warning on erlang:now/0
Use new time API and be back-compatible in inets Remove unused functions and removed redundant test
asn1 test SUITE: Eliminate use of now/0
Disable deprecated warning on erlang:now/0 in diameter_lib
Use new time API and be back-compatible in ssh
Replace all calls to now/0 in CT with new time API functions
test_server: Replace usage of erlang:now() with usage of new API
Replace usage of erlang:now() with usage of new API
Replace usage of erlang:now() with usage of new API
Replace usage of erlang:now() with usage of new API
Replace usage of erlang:now() with usage of new API
otp_SUITE: Warn for calls to erlang:now/0
Replace usage of erlang:now() with usage of new API
Multiple timer wheels
Erlang based BIF timer implementation for scalability
Implement ethread events with timeout
...
Conflicts:
bootstrap/bin/start.boot
bootstrap/bin/start_clean.boot
bootstrap/lib/compiler/ebin/beam_asm.beam
bootstrap/lib/compiler/ebin/compile.beam
bootstrap/lib/kernel/ebin/auth.beam
bootstrap/lib/kernel/ebin/dist_util.beam
bootstrap/lib/kernel/ebin/global.beam
bootstrap/lib/kernel/ebin/hipe_unified_loader.beam
bootstrap/lib/kernel/ebin/inet_db.beam
bootstrap/lib/kernel/ebin/inet_dns.beam
bootstrap/lib/kernel/ebin/inet_res.beam
bootstrap/lib/kernel/ebin/os.beam
bootstrap/lib/kernel/ebin/pg2.beam
bootstrap/lib/stdlib/ebin/dets.beam
bootstrap/lib/stdlib/ebin/dets_utils.beam
bootstrap/lib/stdlib/ebin/erl_tar.beam
bootstrap/lib/stdlib/ebin/escript.beam
bootstrap/lib/stdlib/ebin/file_sorter.beam
bootstrap/lib/stdlib/ebin/otp_internal.beam
bootstrap/lib/stdlib/ebin/qlc.beam
bootstrap/lib/stdlib/ebin/random.beam
bootstrap/lib/stdlib/ebin/supervisor.beam
bootstrap/lib/stdlib/ebin/timer.beam
erts/aclocal.m4
erts/emulator/beam/bif.c
erts/emulator/beam/erl_bif_info.c
erts/emulator/beam/erl_db_hash.c
erts/emulator/beam/erl_init.c
erts/emulator/beam/erl_process.h
erts/emulator/beam/erl_thr_progress.c
erts/emulator/beam/utils.c
erts/emulator/sys/unix/sys.c
erts/preloaded/ebin/erlang.beam
erts/preloaded/ebin/erts_internal.beam
erts/preloaded/ebin/init.beam
erts/preloaded/src/erts_internal.erl
lib/common_test/test/ct_hooks_SUITE_data/cth/tests/empty_cth.erl
lib/diameter/src/base/diameter_lib.erl
lib/kernel/src/os.erl
lib/ssh/test/ssh_basic_SUITE.erl
system/doc/efficiency_guide/advanced.xml
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The old time API is based on erlang:now/0. The major issue with
erlang:now/0 is that it was intended to be used for so many
unrelated things. This tied these unrelated operations together
and unnecessarily caused performance, scalability as well as
accuracy, and precision issues for operations that do not need
to have such issues. The new API spreads different functionality
over multiple functions in order to improve on this.
The new API consists of a number of new BIFs:
- erlang:convert_time_unit/3
- erlang:monotonic_time/0
- erlang:monotonic_time/1
- erlang:system_time/0
- erlang:system_time/1
- erlang:time_offset/0
- erlang:time_offset/1
- erlang:timestamp/0
- erlang:unique_integer/0
- erlang:unique_integer/1
- os:system_time/0
- os:system_time/1
and a number of extensions of existing BIFs:
- erlang:monitor(time_offset, clock_service)
- erlang:system_flag(time_offset, finalize)
- erlang:system_info(os_monotonic_time_source)
- erlang:system_info(time_offset)
- erlang:system_info(time_warp_mode)
- erlang:system_info(time_correction)
- erlang:system_info(start_time)
See the "Time and Time Correction in Erlang" chapter of the
ERTS User's Guide for more information.
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* egil/maps/hamt/OTP-12585: (113 commits)
erts: Fix bug in ESTACK and WSTACK
kernel: Add spec for erts_debug:map_info/1
mnesia: Update mnesia tests to reflect new ETS hash
erts: Ensure maps uses _rel functions in halfword
erts: Do not treat errors as fatal in erl_printf_term
erts: Update preloaded erts_internal.beam
erts: Add map decomposition wrappers
erts: Ensure halfword has correct temp-heap for maps
hipe: Handle separate hashmap tag correctly
erts: Fix map bug in dec_term for 32-bit debug VM
stdlib: Update qlc tests to reflect new ETS hash
stdlib: Remove obsolete hashmap references in io_lib
erts: Enhance maps ordering tests
hipe: Fix maps sort order testcase
erts: Remove unused variable in crashdump creation
erts: Fix typo in copy_struct for halfword emulator
erts: Restrict GCC intrinsics by compiler version
erts: Fix windows bug in hashmap_info
erts: Fix typo in make_hash2 for 32-bit arch
Fix beam_load assert
...
Conflicts:
erts/emulator/beam/bif.tab
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* seriyps/zlib-inflate-bound:
Add zlib limited output buffer size functionality
Conflicts:
erts/preloaded/ebin/zlib.beam
OTP-12548
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This functionality may be useful for compressed streams with high
compression ratio (in case of gzip it may be up to x1000), when
small amount of compressed data will produce large amount of
uncompressed output. This may lead to DoS attacks, because
server easily goes out of memory.
Example of such high compression ratio stream:
```
dd if=/dev/zero of=sparse.bin bs=1MB count=100 # 100mb of zeroes
gzip sparse.bin # 95kb sparse.bin.gz
$ erl
> {ok, Compressed} = file:read_file("sparse.bin.gz"),
> 97082 = size(Compressed),
> Uncompressed = zlib:gunzip(Compressed),
> 100000000 = iolist_size(Uncompressed).
```
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rickard/master/eager-check-io/OTP-12117
* rickard/maint-17/eager-check-io/OTP-12117:
No eager check I/O on OSE
Introduce support for eager check I/O scheduling
Conflicts:
erts/preloaded/ebin/erlang.beam
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rickard/maint-17/eager-check-io/OTP-12117
* rickard/eager-check-io/OTP-12117:
Introduce support for eager check I/O scheduling
Conflicts:
erts/emulator/beam/erl_bif_info.c
erts/emulator/beam/erl_init.c
erts/emulator/beam/erl_process.c
erts/preloaded/ebin/erlang.beam
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Conflicts:
erts/preloaded/ebin/erl_prim_loader.beam
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