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An acknowledgement of the Start command has to be managed
as we have to make sure that packages are not dropped and
also that the close calls do not happen too early.
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os_SUITE:large_output_command send a 10k large
argument to open_port({spawn,""}) which was too
small for the 2K buffer allocated for win32.
The buffer is now dynamic and any size can be used.
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When an async open port fails early, it would sometimes
leak memory.
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Had to move the hashing because of a race that can otherwise happen
where a new os_pid value was inserted into the hash before the
previous value had been removed.
Also replaced the protocol inbetween erts and child setup to be
a binary protocol. This was done in order to deal with the varying
size of Eterm.
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OS X is very strict in what it requires of you and also
gives strange error codes for some errors. In this commit
we remap EMSGSIZE to EMFILE and also precisely tune the
amount of data we send on the socket so that we can recv
only that data. If we try to recv more, recvmsg fails with
EPIPE if the remote end has been closed.
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Instead of forking from the beam process, we create a separate
process in which all forks are done. This has several advantages:
1) performance:
* don't have to close all fd's in the world
* fork only has to copy stuff from a small process
* work is done in a completely seperate process
* a 3x performance increase has been measured,
can be made even greater (10x) if we cache the
environment in child setup
2) stability
* the exec is done in another process than beam, which means that
if the file that we exec to is on an nfs that is not available
right now we will not block a scheduler until the nfs returns.
3) simplicity
* don't have to deal with SIGCHLD in the erts
Unfortunately, this solution also implies some badness.
1) There will always be a seperate process running together with
beam on unix. This could be confusing and undesirable.
2) We have to transfer the entire environment to child_setup
for each command.
OTP-13088
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OTP-13087
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OTP-13086
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OTP-13082
* sverk/binary_split_bif:
erts: Minor refactor for binary find BIF backend
erts: Refactor BIF for binary:match,matches,split
erts: Refactor backend of binary:split
erts: Replace 0 with THE_NON_VALUE
stdlib: Add BIF option 'trim_all' to binary:split/3
stdlib: Add BIF binary:split/2 and binary:split/3
Conflicts:
bootstrap/lib/stdlib/ebin/binary.beam
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* Use NULL instead of THE_NON_VALUE for non-Eterm variable.
* Add BinaryFindState_bignum struct to avoid unnecessary type casting.
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with an common do_binary_find() used by match, matches and split.
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to reduce code volume.
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* maint:
[erl_docgen] Correct documentation
[dialyzer] Correct documentation
[hipe] Correct documentation
[test_server] Correct documentation
[tools] Correct documentation
[erts] Correct documentation
[stdlib] Correct documentation
[kernel] Correct documentation
Conflicts:
lib/stdlib/doc/src/erl_scan.xml
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Fix mistakes found by 'xmllint'.
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* lukas/erts/win32_bool_fix/OTP-13079:
erts: bool is a reserved word, use boolean instead
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* lukas/erts/process_mem_test_fix/OTP-13077:
erts: Don't run processes tests on lcnt with little memory
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* lrascao/fix/build_fail_on_enabled_dist_debug:
Fix build fail when enabling distribution debug messages
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* lucafavatella/dialyzer-fun-literal-arity:
Teach Dialyzer arity of funs with literal arity
OTP-13068
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* maint:
cdv: Fix crashdump ets table type
observer: Show ets owner pid in crashdump viewers ets popup window
erts: Detect and build on MSYS2 for windows
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Conflicts:
erts/preloaded/ebin/prim_inet.beam
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* dgud/msys2-fixes:
erts: Detect and build on MSYS2 for windows
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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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