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to not expose the trapping BIF in the stacktrace
when it throws badarg.
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When the code_server is about to purge a module it will now issue
asynchronous check_process_code requests to all processes at once
instead of one at a time. These check_process_code operation can
execute in parallel.
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Being able to disable garbage collection over context
switches vastly simplifies implementation of yielding
native code that builds large or complex data structures
on the heap. This since the heap can be left in an
inconsistent state over the context switch.
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A process requesting a system task to be executed in the context of
another process will be notified by a message when the task has
executed. This message will be on the form:
{RequestType, RequestId, Pid, Result}.
A process requesting a system task to be executed can set priority
on the system task. The requester typically set the same priority
on the task as its own process priority, and by this avoiding
priority inversion. A request for execution of a system task is
made by calling the statically linked in NIF
erts_internal:request_system_task(Pid, Prio, Request). This is an
undocumented ERTS internal function that should remain so. It
should *only* be called from BIF implementations.
Currently defined system tasks are:
* garbage_collect
* check_process_code
Further system tasks can and will be implemented in the future.
The erlang:garbage_collect/[1,2] and erlang:check_process_code/[2,3]
BIFs are now implemented using system tasks. Both the
'garbage_collect' and the 'check_process_code' operations perform
or may perform garbage_collections. By doing these via the
system task functionality all garbage collect operations in the
system will be performed solely in the context of the process
being garbage collected. This makes it possible to later implement
functionality for disabling garbage collection of a process over
context switches.
Newly introduced BIFs:
* erlang:garbage_collect/2 - The new second argument is an option
list. Introduced option:
* {async, RequestId} - making it possible for users to issue
asynchronous garbage collect requests.
* erlang:check_process_code/3 - The new third argument is an
option list. Introduced options:
* {async, RequestId} - making it possible for users to issue
asynchronous check process code requests.
* {allow_gc, boolean()} - making it possible to issue requests
that aren't allowed to garbage collect (operation will abort
if gc should be needed).
These options have been introduced as a preparation for
parallelization of check_process_code operations when the
code_server is about to purge a module.
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bmk/snmp/snmp4223_integration
Conflicts:
lib/snmp/doc/src/notes.xml
lib/snmp/src/app/snmp.appup.src
lib/snmp/src/misc/snmp_log.erl
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<<131, 77, Len:32, Bits:8, Data/binary>>
badarg if Bits > 8
Used to return internally inconsistent bitstring
badarg if Len==0 and Bits > 0
Used to return invalid *huge* binary (size = (Uint)-1)
badarg if Bits==0 and Len > 0
Used to return valid binary as if Bits was 8
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bmk/snmp/snmp4223_integration
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* metadave/dp_typo/OTP-11475:
fixed typo
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Conflicts:
erts/preloaded/ebin/erl_prim_loader.beam
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* siri/erl_prim_loader/normalize-and-backslash/OTP-11170:
Update preloaded
Fix bug with backslash in erl_prim_loader:normalize/1
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* fredrik/fix_tests_ssl_not_present/OTP-11474:
[eldap, inets]: fix testcases when ssl not is present
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Conflicts:
bootstrap/lib/kernel/ebin/os.beam
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* mhssler/add-os-unsetenv/OTP-11446:
erts: remove ?line macro in testcases
Update primary bootstrap
Add os:unsetenv/1
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* sverk/cerl-gdb-fix:
erts: Fix cerl -gdb
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The sync option adds the POSIX O_SYNC flag to the open system call on
platforms that support the flag or its equivalent, e.g.,
FILE_FLAG_WRITE_THROUGH on Windows. For platforms that don't support it,
file:open/2 returns {error, enotsup} if the sync option is passed in.
The semantics of O_SYNC are platform-specific. For example, not all
platforms guarantee that all file metadata are written to the disk along
with the file data when the flag is in effect. This issue is noted in the
documentation this commit adds for the sync option.
Add a test for the sync option. Note however that the underlying OS
semantics for O_SYNC can't be tested automatically in any practical way, so
the test assumes the OS does the right thing with the flag when
present. For manual verification, dtruss on OS X and strace on Linux were
both run against beam processes to watch calls to open(), and file:open/2
was called in Erlang shells to open files for writing, both with and
without the sync option. Both the dtruss output and the strace output
showed that the O_SYNC flag was present in the open() calls when sync was
specified and was clear when sync was not specified.
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maint
* potatosalad/public_key_incorrect_emailaddress/OTP-11470:
public_key_SUITE: Rename id-at-countryName to id-emailAddress
public_key: Workaround for incorrectly encoded utf8 emailAddress
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This function normalizes a path:
* convert atoms to strings
* flatten strings
* convert backslash to a forward slash
The bugfix is to only convert backslashes to forward slashes on
windows and not on any other platforms.
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When converting an entire Audit Trail Log in a running
system its possble to have log wraps and thereby loosing
log entries.
In order to prevent this the log is now blocked during
conversion (log_to_txt or log_to_io).
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* ia/ssh/one-connection-process/OTP-11363:
ssh: Logging fun and document enhancement
ssh: Add CLI test case
ssh: Quicker shutdown of an ssh dameon
ssh: Add option to disallow CLI
ssh: Simplify handling of connection attributes (e.i. user and sockname)
ssh: Make inet option configurable and remove ipv6_disabled option
ssh: Eliminate test case failure due to timing issues in test case code
ssh: Enhance error handling
ssh: Merge connection_manager and connection_handler processes
ssh: Remove use of process dictionary
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* efine/pr/multicall-doc/OTP-11471:
Fix rpc multicall sample code
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