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A put_map_assoc instruction with an empty source map should be
converted to a simpler new_map instruction. The transformation
didn't happen because an empty source map is no longer represented
as a NIL term (as it was in the beginning before map literals
were implemented).
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Using the exact operator (':=') is only allowed when an existing map
is being updated. Thus the following causes a compilation error:
#{k:=v}
Therefore there is no need to support the put_map_exact instruction
without a source map.
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* egil/maps-test-coverage:
erts: Remove code that was commented out
erts: Cover maps:values/1 for large maps
erts: Test maps:from_list/1 shrinking
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* egil/fix-maps-deep-colliding-merge:
erts: Fix deep colliding hash values in maps:from_list/1
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* egil/fix-hash-float-zero/OTP-12641:
erts: Ensure hashing of zero is consistent
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Erlang treats positive and negative zero as equal, meaning,
true = 0.0 =:= 0.0/-1
However, Erlangs hash functions: hash, phash and phash2 did not
reflect this behaviour. Meaning, the hash values produced by
the different hash functions would not be identical for positive
and negative zero.
This commit ensures that hash value of positive zero is always
produced regardless of the signedness of the zero float, i.e.
true = erlang:phash2(0.0) =:= erlang:phash2(0.0/-1)
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Conflicts:
OTP_VERSION
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* ia/ssh/packet_size0/OTP-12645:
ssh: Reset upgrade instructions to default
ssh: Change version (vsn.mk)
ssh: Option minimal_remote_max_packet_size and test cases
ssh: fix loop bug for zero maximum_packet_size.
ssh: Add ssh_info:print/1 to write onto a file descriptor
ssh: Add {active, false} to ssh listen socket
ssh: Change send_buf implementation from list to queue
ssh: Remove error report
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* bjorn/stdlib/cuddle-with-tests:
Eliminate deprecated now/0 used as timestamp
Eliminate use of now/0 for creating a unique filename
Eliminate use of deprecated now/0 for measuring time
Eliminate use of deprecated now/0 for random number generation
Speed up timer_simple_SUITE:timer_perf/1
Speed up timer_SUITE
Optimize gen_server_SUITE:hibernate/1
Optimize gen_event_SUITE:hibernate/1
Optimize gen_fsm_SUITE:hibernate/1
Optimize unicode_SUITE:ex_binaries_errors* test cases
Optimize unicode_SUITE:binaries_errors/1
binary_module_SUITE: Remove unnecessary calls to the binref module
Optimize binary_module:random_ref_comp/1
Optimize io_proto_SUITE:unicode_options_gen/1
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Rewrite the code to measure and print elapsed time instead of just
printing timestamps for the start and stop of each operation.
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Use erlang:unique_integer/1 instead.
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Use erlang:monotonic_time/1 instead of now/0.
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Use erlang:timestamp/0 instead now/0 when seeding the random
number generator.
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In big_test/1, there is 9 seconds sleep before spawning any timers.
Why? Before the sleep nrev processes are started, but they are likely
to finish running before the 9 seconds have elapsed.
Since I see no reason at all for the sleep, I will remove it.
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The single test case in timer_SUITE is annoyingly slow. On average,
its running time is about 4 minutes (estimated by a
back-of-the-envelope calculation).
Scale down the delay times in the main loop and the length of timers
started. The running average time should now be around 80 seconds.
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The running time for gen_server_SUITE:hibernate/1 is about 12 seconds
because of 1000 ms sleeps in the test case. Introduce a helper
function to avoid sleeping more than necessary.
While we are it, also remove all ?line macros in the test case.
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The running time for gen_event_SUITE:hibernate/1 is about 20 seconds
because of 1000 ms sleeps in the test case. Introduce helper
functions to avoid sleeping more than necessary.
While we are it, also remove all ?line macros in the test case.
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The running time for gen_fsm_SUITE:hibernate/1 is almost 30 seconds
because of 1000 ms sleeps in the test case. Introduce helper
functions to avoid sleeping more than necessary.
While we are it, also remove all ?line macros in the test case.
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Refactor the code so that the error test cases for utf16 can
share the code for big and little endian. Do the same for utf32.
The major optimization is the observation that the following code:
byte_size(unicode:characters_to_binary(List, unicode, {utf16,big})
can be replaced with:
2*length(List)
which is much faster. (That optimization is not safe in general,
but for the lists used in the error tests cases, it is.)
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unicode_SUITE:binaries_errors/1 is the slowest test case in
unicode_SUITE. Its running time is about 50 seconds on my computer.
Break apart unicode_SUITE:binaries_errors/1 into several test cases
that can run in parallel.
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The compile_pattern/1 function in the binref module is a dummy
function. Therefore, calling binref:match/2 once with the plain
pattern and once with a "pre-compiled" pattern will take twice as
long, but will not help us find more errors.
I shaved off one fourth of the running time for random_ref_comp/1
by eliminating the unnecessary calls to the binref module.
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* sverk/maps-bin2term-eqhash-bug/12585:
erts: Fix bug in map_from_list when keys clash in both value and hash
erts: Fix bug in binary_to_term for big maps with 32 bit hash-clash
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Repeated keys will shrink map to a flatmap if the number of pairs drops below the limit.
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* ia/ssl/improve_docs:
ssl: Document enhancements
ssl: Align with alphabetical order
ssl: Align with editorial changes
ssl: Correct merge error
ssl: Add links
ssl: Correct typos
ssl: Correct XML-tag
ssl: Technically clarify description
ssl: Editorial updates
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Change description proposed by technical writer to make better use
of technical terms. Also add some new language improvments discussed
with the technical writer.
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* sverk/refactor-encode-size/OTP-12585:
erts: Optimize insert and delete for big maps
erts: Optimize == and /= for unequal big maps
erts: Refactor encode_size_struct_int
Conflicts:
erts/emulator/beam/erl_map.c
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* sverk/ets-grow-faulty-assert/OTP-12647:
erts: Fix ets bug in debug VM
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Symptom: ASSERT(segtab[seg_ix] == NULL) in alloc_seg() fails.
Remedy: Make sure we set segment pointer to NULL in free_seg()
even when we switch to smaller segtab.
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* sverk/valgrind-broken_halt:
erts: Suppress valgrind for bif_SUITE:erlang_halt
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* hb/stdlib/fix_qlc_testcase:
Fix a qlc testcase
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A channel could be opened with the 'max packet size' set to 0. The behaviour is not defined in the ssh rfc:s, and openssh does not handle that case in some special way besides looping.
The introduced solution just "keep quiet" but removes the eternal loop that caused Erlang to core dump.
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The ssh acceptor process listens for connections and
spawns a process to handle each new connection that it accepts.
The ownership of the accepted socket will be transfered to the new process
that will handle the incomming messages. Before the ownership is
transfered the socket should be in {active, false} or the acceptor
process may receive data aimed for the connection. As the accept socket
inherits the listen options we set {active, false} there.
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A queue is the behaviour that we want, so this makes the code
easier to understand and more effective.
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The error report was assumed to only happen if our code was wrongly
implemented "internal error". However it would also occur when
bad input was recived from the peer, and could hence cause extensive
logging on DoS attacks.
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