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* richcarl/code-change-utils/PR-1257/OTP-14059:
Update preloaded modules
Add shell mm() and lm() functions
Add code:module_status/1 and modified_modules/0
Fix spec for erlang:get_module_info()
Handle prefetched paths
Restructure code:which() and where_is_file()
Remove remnants of module package support
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These functions use the MD5 beam/native checksum to determine whether the
code for a module has changed on disk and is a candidate for loading.
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Hardware watchdog support was removed from heart in R13A, but there were
still some vestiges in the code and the documentation.
- Remove mentions of the HW_WD_DISABLE variable, as it's no longer used.
- Remove the HEART_BEAT_BOOT_DELAY variable, as it was only used for the
hardware watchdog.
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* siri/appups-20.0:
Update sasl/test/test_lib.hrl with recent versions of kernel and stdlib
Update appups in kernel, stdlib and sasl for OTP-20
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'gomoripeti/kernel/controlling_proc_badarg_doc/PR-1208/OTP-14022' into maint
* gomoripeti/kernel/controlling_proc_badarg_doc/PR-1208/OTP-14022:
controlling_process can return {error, badarg}
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* sverker/kernel-erts-dependency:
kernel: Add lost dependency to erts-8.1
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In OTP-19.1 (c70ca686fe269db6079a2ca1c7e09cdfc0cfa903)
erts_code_purger:finish_after_on_load/2 was added
and called by code_server.erl.
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For gen_tcp, gen_udp and gen_sctp controlling_process/2 can return
badarg if erlang:port_connect/2 fails with badarg. This can easily
happen if the new owner is not alive but in some race condition also
when the socket is closed right before port_connect/2 (and after the
previous socket function)
This commit documents this behaviour.
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The code of add_ref/6 contained an assertion that somehow appeared
twice. Also, a recent commit (2b2de61) suppressed an unmatched
return warning in a non-optimal way. By changing the return type
of hipe_bifs:add_ref/2 to be 'ok' instead of [] the code can be
cleaned up and simplified.
While at it, fixed the wrong indentation of some nearby code.
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when failing to load native code.
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by introducing hipe_bifs:commit_patch_load/1
that creates the HipeModule.
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Just like the BEAM loader state (as returned by
erlang:prepare_loading/2), the HiPE loader state is contained in a magic
binary.
Eventually, we will separate HiPE loading into a prepare and a finalise
phase, like the BEAM loader, where the prepare phase will be implemented
by hipe_unified_loader and the finalise phase be implemented in C by
hipe_load.c and beam_load.c, making prepare side-effect free and
finalise atomic. The finalise phase will be exposed through the
erlang:finish_loading/1 API, just like the BEAM loader, as this will
allow HiPE and BEAM modules to be mixed in the same atomic "commit".
The usage of a loader state makes it easier to keep track of all
resources allocated during loading, and will not only make it easy to
prevent leaks when hipe_unified_loader crashes, but also paves the way
for proper, leak-free, unloading of HiPE modules.
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and hipe_bifs:update_code_size
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A step toward better integration of hipe load and purge
Highlights:
* code_server no longer needs to call hipe_unified_loader:post_beam_load/1
Instead new internal function hipe_redirect_to_module()
is called by loading BIFs to patch native call sites if needed.
* hipe_purge_module() is called by erts_internal:purge_module/2
to purge any native code.
* struct hipe_mfa_info redesigned and only used for exported
functions that are called from or implemented by native code.
A list of native call sites (struct hipe_ref) are kept for each hipe_mfa_info.
* struct hipe_sdesc used by hipe_find_mfa_from_ra()
to build native stack traces.
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as they are lists of #fundef records
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* rickard/time-unit/OTP-13831:
Replace usage of deprecated time units
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* nathanl/kernel/write_file-uses-writev/PR-1149/OTP-13909:
Let file:write_file/3 use writev
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Previously, this function would turn any input into a single binary
before writing. This meant it could not take advantage of the `writev`
system call if it was given a list of binaries and told to write with
`raw` mode.
To see this, start an erlang shell on the parent commit, and also
start this dtrace script:
https://github.com/evanmiller/tracewrite
like this:
sudo dtrace -s tracewrite.d -p $(pgrep beam)
In the erlang shell, run the following:
file:write_file("/tmp/tmp.txt", [<<97,98>>, <<98,97>>], [raw]).
In the dtrace output, you will see that the system call used is `write`.
Now repeat with this commit, and you will see that `writev` is used.
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Also update already deprecated calls.
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* raimo/diffserv-socket-option/OTP-13582:
Tune 'tclass' semantics
Implement IPV6_TCLASS
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* maint:
erts: Add nif_SUITE:t_on_load
erts: Improve nif_SUITE:upgrade test
Don't leak old code when loading a modules with an on_load function
Conflicts:
erts/preloaded/ebin/erts_code_purger.beam
erts/preloaded/ebin/erts_internal.beam
erts/preloaded/src/erts_code_purger.erl
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* bjorn/erts/on_load/ERL-240/OTP-13893:
erts: Add nif_SUITE:t_on_load
erts: Improve nif_SUITE:upgrade test
Don't leak old code when loading a modules with an on_load function
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Normally, calling code:delete/1 before re-loading the code for a
module is unnecessary but causes no problem.
But there will be be problems if the new code has an on_load function.
Code with an on_load function will always be loaded as old code
to allowed it to be easily purged if the on_load function would fail.
If the on_load function succeeds, the old and current code will be
swapped.
So in the scenario where code:delete/1 has been called explicitly,
there is old code but no current code. Loading code with an
on_load function will cause the reference to the old code to be
overwritten. That will at best cause a memory leak, and at worst
an emulator crash (especially if NIFs are involved).
To avoid that situation, we will put the code with the on_load
function in a special, third slot in Module.
ERL-240
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* tuncer/kernel/on_load-error-string/PR-1155:
Print on_load error in a more useful style
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* lukas/kernel/os_cmd_fix_stdin_close/OTP-13867:
kernel: Close stdin of commands run in os:cmd
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This is needed when running programs that only exit when
stdin has been closed, e.g. 'more'.
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When printing the error term from on_load, insert a newline because the
term is never short and will produce hard to read/copy output that is
just hanging off to the right.
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