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* ar/odbc_nagel:
Under Unix enable TCP_NODELAY to disable Nagel's socket algorithm
OTP-10506
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* nk/jinterface-fix_compressed_binary:
add (de)compress roundtrip tests with larger values
fix reading compressed binary terms from Java
OTP-10505
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* at/binary-depth-printing:
Fix printing the empty binary at depth 1 with ~W
OTP-10504
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* jf/fix_sctp_peeloff_active_true:
Set new peeled off SCTP socket to nonblocking socket
SCTP test case with socket active options once and true
OTP-10491
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* node_start_immediately_after_crash tests that heart restarts
beam upon a crash and will not generate a crash dump
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Not setting ERL_CRASH_DUMP_SECONDS will now terminate beam
immediately on a crash without writing a crash dump file.
Setting ERL_CRASH_DUMP_SECONDS to 0 will also terminate beam
immediately on a crash without writing a crash dump file, i.e. same as not
setting ERL_CRASH_DUMP_SECONDS environment variable.
Setting ERL_CRASH_DUMP_SECONDS to a negative value will let the beam wait
indefinitely on the crash dump file being written.
Setting ERL_CRASH_DUMP_SECONDS to a positive value will let the beam wait
that many seconds on the crash dump file being written.
A positive value will set both an alarm in beam AND a heart timeout for restart
if heart is running.
This is due to the change of 'heart' behavior when 'heart' is
listening for a crash.
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When a crash dump is about to be written and we have
heartbeat enabled on a system. We need time to write it
before heart explicitly kills the beam.
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Perl 5.16.1 (and perhaps other versions) issues the following
warning:
defined(@array) is deprecated at utils/beam_makeops line 1714.
(Maybe you should just omit the defined()?)
for the following line:
$prev_last = pop(@{$gen_transform{$key}})
if defined @{$gen_transform{$key}}; # LINE 1714
The documentation for "defined" says that its use on hashes and
arrays is deprecated and that it may stop working in a future
release.
Simply removing "defined" (as suggested by the warning message)
will not work, as there will be an error when trying to use an
undefined value as an array reference:
Can't use an undefined value as an ARRAY reference at
utils/beam_makeops line 1714.
What we must do is to check whether $gen_transform{$key} is
defined before trying to use it as an array reference.
Noticed-by: Tuncer Ayaz
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* tp/supervisor-pass-on-errors:
If supervisor:start_link fails to start child, add child id to error reason
Fix documentation about how supervisor handles crash in child's start function
Have supervisor send errors up the chain
OTP-10490
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* egil/add-scalefactor-to-start_node:
test_server: Let start_node/3 utilize scalefactor
test_server: Refactor timetrap_scale_factor/0
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os:type/0 always returns a two-tuple.
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On Windows, the log files are not placed under priv_dir, so we will
have to retrieve the path using ct_test_support (which works fine
on all platforms).
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* lukas/erts/dont_break_reductions_skip/OTP-10373:
Skip dont_break_reductions on hipe libs tests
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* lukas/erts/bad_terms_hipe_skip/OTP-10375:
Skip fun corruption when lists is native
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* hb/kernel/spec_fix/OTP-10473:
Fix the contract of erl_ddll:format_error/1
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* hb/stdlib/spec_fix/OTP-10474:
Change the type of some arguments in filename to file:name()
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This is needed as corruption of the index_uniq byte
can cause very strange behaviour when the fun is called
by native code.
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* bjorn/compiler/minor-optimization-polishing/OTP-10193: (25 commits)
beam_bsm: Handle calls slightly better
Break apart tail-recursive call instructions
Represent the 'send' instruction as a call_ext/2 instruction
Rewrite select_val and select_tuple_arity to a select instruction
Rewrite binary creation instructions to bs_init instructions
Rewrite bs_add, bs_utf*_size to BIF instructions in optimizations
Rewrite bs_put* instructions to a generic bs_put instruction
Refactor removal of unused labels
Introduce the mandatory beam_a and beam_z passes
compile: Fix bug in selection of passes
beam_receive: Optimize receives using refs created by spawn_monitor/{1,3}
compile: Give a friendler error message if a parse transform cannot be found
beam_jump: Don't move a block which can be entered via a fallthrough
beam_jump: Fix broken optimization
v3_kernel: Fix match code for matched out segment size in multiple clauses
Improve binary matching of literals
v3_codegen: Combine adjacent bs_match_string instructions
beam_bool: Recognize more safe optimizations
beam_utils: Correct usage calculations for GC BIFs in blocks
beam_utils:live_opt/1: Correct liveness calculation for 'try'
...
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We were too conservative when handling a call when there were copies of
the match context in both x and y registers. Don't give up if there
is are copies of the match context in y registers, as long as those
copies are killed by the code that follows the call.
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Somewhat reduce the code bloat by eliminating special cases.
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Somewhat reduce code bloat.
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Eliminate some code bloat.
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* egil/fix-boot_combo-test:
test: Fix smoke_test_SUITE
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* siri/sasl/appup-regexp-fix/OTP-10463:
Fix release_handler:find_script so it can read regexp in appups
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* maint:
Fix bug when making nsis target
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* lukas/erts/whitespace_nsis_fix/OTP-10481:
Fix bug when making nsis target
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* Skip boot_combo tests where cannot start slave nodes
(The binary will not exist)
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Rewrite the five binary creation instructions to a bs_init
instruction, in order to somewhat reduce code bloat.
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We can remove some code bloat by handling the special instructions
as BIF instructions in the optimization passes. Also note that
bs_utf*_size was not handled by beam_utils:check_liveness/3
(meaning the conservative answer instead of the correct answer
would be returned).
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Seven bs_put_* instructions can be combined into one generic bs_put
instruction to avoid some code bloat. That will also improve some
optimizations (such as beam_trim) that did not handle all bs_put*
variants.
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Since we always want to remove unused labels directly after code
generation (whether we'll run the optimization passes or not),
we can simplify the code by doing it in beam_a.
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Introduce the mandary beam_a pass that will be run directly after code
generation, and the mandatory beam_z pass that will be run just before
beam_asm. Since these passes surround the optimizations, beam_a can
(for example) do instruction renaming to simplify the optimization
passes and beam_z can undo those renamings.
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Don't throw the parse tree in the face of the user.
OTP-8707
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beam_jump moves short code sequences ending in an instruction that causes
an exception to the end of the function, in the hope that a jump around
the moved blocked can be replaced with a fallthrough. Therefore, moving
a block that is entered via a fallthrough defeats the purpose of the
optimization.
Also add two more test cases for the beam_receive module to ensure that
all lines are still covered.
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A test instruction with the same target label as jump immediately
followed it was supposed to be removed, but it was kept anyway.
Fix that optimization, but also make sure that the test instruction
is kept if the test instruction may have side effects (such as
a bit syntax matching instruction).
While at it, make the code cleaner by breaking it up into two clauses
and don't remove the jump instruction if it is redudant (removal of
redundant jump instructions is already handled in another place).
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When matched variable is used as a size field in multiple clauses,
as in:
foo(<<L:8,A:L>>) -> A;
foo(<<L:8,A:L,B:8>>) -> {A,B}.
the match tree would branch out before the segment that used the
matched-out variable (in this example, the tree would branch out before
the matching of A:L). That happens because the pattern matching
compilator did not take variable substitutions into account when
grouping clauses that match the same value.
That is, the generated code would work similarly to this code:
foo(<<L:8,T/binary>>) ->
case T of
<<A:L>> ->
A;
_ ->
case T of
<<A:L,B:8>> -> %% A matched out again!
{A,B}
end
end.
We would like the matching to work more like:
foo(<<L,A:L,T/binary>>) ->
case T of
<<>> -> A;
<<B:8>> -> {A,B}
end.
Fix the problem by taking the substitutions into account when grouping
clauses that match out the same value.
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The bs_match_string instruction is used to speed up matching of
binary literals. For example, given this source code:
foo1(<<1,2,3>>) -> ok.
The matching part of the code will look like:
{test,bs_start_match2,{f,1},1,[{x,0},0],{x,0}}.
{test,bs_match_string,{f,3},[{x,0},24,{string,[1,2,3]}]}.
{test,bs_test_tail2,{f,3},[{x,0},0]}.
Nice. However, if we do a simple change to the source code:
foo2(<<1,2,3>>) -> ok;
foo2(<<>>) -> error.
the resulting matching code will look like (sligthly simplified):
{test,bs_start_match2,{f,4},1,[{x,0},0],{x,0}}.
{test,bs_get_integer2,{f,7},1,[{x,0},{integer,8},1,Flags],{x,1}}.
{test,is_eq_exact,{f,8},[{x,1},{integer,1}]}.
{test,bs_match_string,{f,6},[{x,0},16,{string,[2,3]}]}.
{test,bs_test_tail2,{f,6},[{x,0},0]}.
{move,{atom,ok},{x,0}}.
return.
{label,6}.
{bs_restore2,{x,0},{atom,start}}.
{label,7}.
{test,bs_test_tail2,{f,8},[{x,0},0]}.
That is, matching of the first byte is not combined into the
bs_match_string instruction that follows.
Fix this problem by allowing a bs_match_string instruction to be
used if all clauses will match either the same integer literal or
the empty binary.
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In modules with huge functions with many bs_match_string
instructions, we can speed up the compilation by combining
adjacent bs_match_strings instruction in v3_codegen (as opposed
to in beam_block where we used to do it).
For instance, on my computer the v3_codegen became more than
twice as fast when compiling the re_testoutput1_split_test module
in the STDLIB test suites.
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