Age | Commit message (Collapse) | Author |
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We always want the error to propagate up to the application
when a child cannot be created.
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when called by hash.c for example.
We use ASSERT from sys.h but erl_child_setup implements
its own erl_assert_error() as it doesn't link with sys.o.
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With the new forker implementation also enomem can be returned
as an indicator that it is not possible to create more ports.
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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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Since we no longer to vfork in the emulator there is
no need to serialize the os:cmd calls through a central
command server. This greatly decreases the complexity of
this code and should make it fast+more scalable.
OTP-13089
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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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* ia/libressl:
ssl: Print openssl version string
ssl: Do not use environment variables in openSSL config file
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* siri/appups-18.2:
Update appups in kernel, stdlib and sasl for OTP-18.2
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* ia/inets/dialyzer-custom:
inets: Include behaviour modules in install target
inets: Fix dialyzer warning
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* hb/stdlib/remove_old_type_syntax/OTP-11879:
stdlib: Add a comment about is_subtype(_, _) constraints
hipe: Use '::' for constraints
debugger: Use '::' for constraints
doc: Remove 'is_subtype' from Types and Function Specifications
dialyzer: Print constraints using the '::' syntax
stdlib: Remove undocumented function specification syntax
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It is harder to remove is_subtype from the parser since the abstract
format does not separate is_subtype from the '::' syntax.
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The syntax -spec/callback F/A :: FunctionType; has been removed.
No deprecation was deemed necessary.
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* zandra/update-windows-docs:
update the howto build and install on windows documentation
OTP-13192
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OTP-13188 ticket for: 192c4a80c7d6fe9949aecb864901c4a3d9549f36
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In practice, it does not seem that code path cache can
improve performance. Looking for any file that is not found
will cause the cache to be rebuilt, which will negate any
gain of using the cache.
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