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* origin/hasse/kernel/rpc_doc_fix/OTP-10551:
kernel: Improve docs of rpc:multicall/5
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* john/erts/allow-opening-device-files/OTP-11462:
Allow opening device files and FIFOs with file:open/2
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* maint:
Skip testing unavailable interfaces in inet_SUITE:getifaddrs
Make re_SUITE:sub_binaries less unstable
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This test consistently failed on Windows when an interface was
enabled but unplugged, as the interface was 'up' but not 'running'.
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* lukas/kernel/dist_SUITE_corefile_ignore:
kernel: Ignore cores in erl_distribution_SUITE
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To the best of our knowledge this was introduced since file operations
on device files/FIFO:s could hang the emulator forever back when the
emulator was single-threaded and lacked IO threads; a read operation
could block all progress preventing the write operation it waited for
from occurring.
Granted, this could still happen through starving all dirty IO
schedulers, but the same issue can arise with NFS files which we've
always allowed.
Removing this restriction also lets us remove a stat(2) call that was
added to specifically allow `/dev/null`.
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or backslash on Windows.
Purpose: Prevent tricks to get hostile code running.
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* maint:
Updated OTP version
Update release notes
Update version numbers
kernel: Add os:cmd/2 with max_size option
# Conflicts:
# OTP_VERSION
# lib/kernel/doc/src/os.xml
# lib/kernel/src/os.erl
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* maint-20:
Updated OTP version
Update release notes
Update version numbers
erts: Add system_flags(erts_alloc,"+M?sbct *")
erts: Add age order first fit allocator strategies
erts: Refactor erl_ao_firstfit_alloc
erts: Add migration options "acnl" and "acfml"
kernel: Add os:cmd/2 with max_size option
erts: Add more stats for mbcs_pool
erts: Fix alloc_SUITE:migration
stdlib: Make ets_SUITE memory check try again
erts: Improve carrier pool search
erts: Improve alloc_SUITE:migration
erts: Refactor carrier dealloc migration
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* hasse/no_get_stacktrace/OTP-14861:
erts: Update abstract format doc with stacktrace variable
wx: Do not call erlang:get_stacktrace()
tools: Do not call erlang:get_stacktrace()
stdlib: Do not call erlang:get_stacktrace()
sasl: Do not call erlang:get_stacktrace()
runtime_tools: Do not call erlang:get_stacktrace()
reltool: Do not call erlang:get_stacktrace()
parsetools: Do not call erlang:get_stacktrace()
observer: Do not call erlang:get_stacktrace()
mnesia: Do not call erlang:get_stacktrace() (cont)
mnesia: Do not call erlang:get_stacktrace()
kernel: Do not call erlang:get_stacktrace()
inets: Do not call erlang:get_stacktrace()
eunit: Do not call erlang:get_stacktrace()
et: Do not call erlang:get_stacktrace()
dialyzer: Do not call erlang:get_stacktrace()
debugger: Do not call erlang:get_stacktrace()
debugger: Do not try to restore stacktrace
common_test: Do not call erlang:get_stacktrace()
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The existing wording may be interpreted as saying that embedded mode
eager loads all modules. This revision makes clear embedded mode only
disables module auto loading.
Since I was on it, I have reordered a couple of places to describe
interactive first, and then embedded. It feels natural to cover first
the default and positive mode (auto loads), and then its negation.
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Currently HiPE amd64 assumes the runtime system code is loaded into
the low 2G of the address space. However, this is not the case when
PIE is enabled, it is loaded into a random location. So trampolines
are required to call BIFs, and also we have first to load the address
of sse2_fnegate_mask to a regisiter before xorpd in fchs.
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Some bash versions segfault when a unicode argument is given
so we ignore cores created by nodes spawned by this testcase.
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* maint:
kernel: Correct contracts and a bug in group_history
stdlib: Correct contracts
dialyzer: Optimize handling of a lot of warnings
Conflicts:
lib/kernel/src/erl_boot_server.erl
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particularly slow erlc when compiler is hipe compiled.
hipe_unified_loader:load did not patch external call sites
and instead caused a double hipe mode switch per call.
hipe_unified_loader:load is only used
for early modules first loaded as beam
and by code:atomic_load and friends.
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* maint:
stdlib: Correct a filelib test case
stdlib: Let filelib:find_source() search subdirs
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OTP:13713: Add documentation and typespecs for inet:i/0
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The Design Principles states that an application can have Erlang
source files one level below the "src" directory, and now
filelib:find_source() by default searches one level below "src".
The same applies to "esrc". That directory is only mentioned in
filename(3).
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Previously we accepted trailing NULs, which was backwards compatible
as such usage never resulted in misbehavior in the first place. The
downside is that it prevented erts_native_filename_need from
returning an accurate number of *actual characters*, needlessly
complicating encoding-agnostic code like erts_osenv.
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putenv(3) and friends aren't thread-safe regardless of how you slice
it; a global lock around all environment operations (like before)
keeps things safe as far as our own operations go, but we have
absolutely no control over what libc or a library dragged in by a
driver/NIF does -- they're free to call getenv(3) or putenv(3)
without honoring our lock.
This commit solves this by setting up an "emulated" environment which
can't be touched without going through our interfaces. Third-party
libraries can still shoot themselves in the foot but benign uses of
os:putenv/2 will no longer risk crashing the emulator.
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false should be never, false not found in the source code
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* dgud/kernel/refc_sched_wall_time/OTP-11694:
test: spawn scheduler_wall_time flag holder
Turn on scheduler_wall_time in an alive process
Redirect system_flag(scheduler_wall_time,_) to kernel_refc
kernel: add a resource reference counter
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Slightly optimize reading of cooked files in list mode
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by limiting the memory usage.
Our valgrind test machine (pharazon) seems to get totally swamped
by this test case.
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In general, the new NIF-based file routines are faster than the old
efile driver.
However, on some computers, building the entire OTP system is somewhat
slower. It turns out that it is because 'erlc' cheated by turning off
the IO thread pool (using '+A0') to avoid context switches between
scheduler threads and threads in the IO thread pool. The new file
routines perform IO on dirty IO threads, and there is (by intent) no
way to force the operations to occur on scheduler threads to avoid
the context switches
What we can do to is to use a small (4Kb) read-ahead buffer for files
opened for reading (only) in list mode (which is how the compiler
opens its input files). The buffering reduces the number of context
switches between scheduler threads and dirty IO threads. On my
computer that seems to slightly speed up building of the entire OTP
system.
The buffer should do no harm. The only potential for harm I can
think of is random access to a file opened in read mode, where
the read-ahead buffer could slightly decrease performance. That
does not seems to be a likely use case in practice, though.
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Also fix a typo.
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* origin/raimo/ssl-dist-bench/OTP-14657:
Write SSL distribution benchmarks
Polish SSL distribution
Handle whitebox test message
Correct distribution doc
Use SNI when connecting
Use -ssl_dist_optfile options
Read in -ssl_dist_optfile to ETS
Facilitate test certs with common root
Stop checking DNS name for SNI
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System resources/functionality may need to be reference counted
to be handled correctly when used or enabled/disabled from more
than one process or application.
It is easier to handle this in erlang code than in erts, so make a
process that deals with the housekeeping.
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