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This reverts commit 321dc6ee0241f802c940def174c0a77262e11f21.
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* sverker/enable-big-creation/OTP-15603:
epmd: Support 32-bit creation values in local node
erts: Robustify epmd reply function
erts: Reject decoded local refs with too large first word
erts: Fix bug in list_to_ref
erl_interface: Remove old encoding of pid,port,refs
erts: Remove old encoding of pids, ports and refs
erts: Make DFLAG_BIG_CREATION mandatory
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This commit removed the general send context (which was used
very little anyways) and only uses the distributed send context.
This will make it easier to use the dist API at the cost of
a little bit more code for the local send.
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OTP-15612
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The dist messages EXIT, EXIT2 and MONITOR_DOWN have been
updated with new versions that send the reason term as
part of the payload of the message instead of as part
of the control message.
This allows the decode of the reason to be done by the
receiving process instead of the dist entry which in turn
makes it possible for multiple decodes to be done in
parallel.
This change is done in order to make it easier to fragment
the potentially large payload of EXIT, EXIT2 and MONITOR_DOWN
into multiple distribution messages.
OTP-15611
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All of the Red-Black Tree _yielding functions have been
updated to work with reductions returned by the called
function instead of yielding on each element.
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spelled out as "port specific data".
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* Make connection_id part of the distribution handle as {ConnId, DistEntry}
in order for BIFs to verify correct connection.
* Make distribution handle opaque to net_kernel.
* Remove some unsafe lockless reads of DistEntry.flags
* Change state ERTS_DE_STATE_EXITING to be more of an internal state that
prevents erts from enqueue, encode or schedule new data to be sent. Otherwise
it should behave like ERTS_DE_STATE_CONNECTED.
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* maint:
Updated OTP version
Update release notes
Update version numbers
erts: Fix "Prevent inconsistent node lists" fix
Fix include-path regression caused by dd0a39c
Restore default SIGTERM behaviour for port programs
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done in a31216200bdee2c04b3fb3ae5e26607674715c8a
that could cause a new pending connection to be incorrectly aborted.
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* maint:
Updated OTP version
Update release notes
Update version numbers
kernel: Fix missing abort_connection in net_kernel
Prevent inconsistent node lists
Fix an endless rescheduling loop when a process is executing process_info(self(), ...)
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If net_kernel "forgets" to abort a connection (as it currently might),
the garbage collection of a distribution entry could cause node lists
to enter an inconsistent state.
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of crashing emulator with 'Absurdly large distribution data buffer'
Exception must be thrown when buffer has been created and it's size is known. The actual buffer size is not known until the message has been encoded in ERTS_DSIG_SEND_PHASE_FIN. It would have been nice to abort before allocating and encoding, but in order to do that in a safe way the size calculation would need improvements. It is good enough to abort in the ERTS_DSIG_SEND_PHASE_FIN while we wait for the "fragmented distribution message" feature.
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OTP-14899
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Communication between Erlang processes has conceptually always been
performed through asynchronous signaling. The runtime system
implementation has however previously preformed most operation
synchronously. In a system with only one true thread of execution, this
is not problematic (often the opposite). In a system with multiple threads
of execution (as current runtime system implementation with SMP support)
it becomes problematic. This since it often involves locking of structures
when updating them which in turn cause resource contention. Utilizing
true asynchronous communication often avoids these resource contention
issues.
The case that triggered this change was contention on the link lock due
to frequent updates of the monitor trees during communication with a
frequently used server. The signal order delivery guarantees of the
language makes it hard to change the implementation of only some signals
to use true asynchronous signaling. Therefore the implementations
of (almost) all signals have been changed.
Currently the following signals have been implemented as true
asynchronous signals:
- Message signals
- Exit signals
- Monitor signals
- Demonitor signals
- Monitor triggered signals (DOWN, CHANGE, etc)
- Link signals
- Unlink signals
- Group leader signals
All of the above already defined as asynchronous signals in the
language. The implementation of messages signals was quite
asynchronous to begin with, but had quite strict delivery constraints
due to the ordering guarantees of signals between a pair of processes.
The previously used message queue partitioned into two halves has been
replaced by a more general signal queue partitioned into three parts
that service all kinds of signals. More details regarding the signal
queue can be found in comments in the erl_proc_sig_queue.h file.
The monitor and link implementations have also been completely replaced
in order to fit the new asynchronous signaling implementation as good
as possible. More details regarding the new monitor and link
implementations can be found in the erl_monitor_link.h file.
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Just to simplify and get 4 distinctive states
IDLE, PENDING, CONNECTED and EXITING.
The old possible flag combos were:
0
PENDING
CONNECTED
CONNECTED|EXITING
EXITING
The two EXITING states did not serve any purpose
other then as a slight optimization in monitor_node(_,false,_)
to shortcut EXITING when there can be no monitors.
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to only transcode if output buffer actually contains
unsupported BIT_BINARY_EXT or EXPORT_EXT.
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to replace DFLAGS_STRICT_ORDER_DELIVERY
and remove that compile time dependency.
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for kernel to ask erts about distribution flags
and keep this info in one place.
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by suppressing DOP_MONITOR_P, DOP_MONITOR_P_EXIT and DOP_DEMONITOR_P
if not supported by the remote node.
In 17e198d6ee60f7dec9abfed272cf4226aea44535
I changed the behavior of erlang:monitor
to not raise badarg for c-nodes but instead create
a monitor to only supervise the connection.
But I forgot to prevent DOP_MONITOR_P and friends from being
sent to the node that does not expect them.
Note: We test both DFLAG_DIST_MONITOR and DFLAG_DIST_MONITOR_NAME
for the node to support process monitoring. This is because
erl_interface is buggy as it sets DFLAG_DIST_MONITOR without
really supporting it.
ToDo: Should erl_interface stop setting DFLAG_DIST_MONITOR
or should we change the meaning of these flags?
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Don't need to be pointer-pointer
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and abort_pending_connection into own utility function.
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to make sure it's kept alive.
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to avoid tuple fallbacks for export funs and bitstrings.
ToDo: Re-encode if receiver turn out to be erl_interface/jinterface.
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Conflicts:
erts/emulator/beam/bif.c
erts/emulator/beam/dist.c
erts/emulator/beam/dist.h
erts/emulator/beam/erl_bif_info.c
erts/emulator/beam/erl_node_tables.c
erts/emulator/beam/erl_node_tables.h
erts/emulator/beam/external.c
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This reverts commit 65b04e233e09e3cc2e0fda3c28e155b95c5a4baf.
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term_to_binary will always generate utf8 atoms
ATOM_UTF8_EXT and SMALL_ATOM_UTF8_EXT.
Old latin1 atoms, ATOM_EXT and SMALL_ATOM_EXT, are still decoded.
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* fix-source-typos: (25 commits)
Fixed typos in system/doc
Fixed typos in lib/xmerl
Fixed typos in lib/wx
Fixed typos in lib/stdlib
Fixed typos in lib/snmp
Fixed typos in lib/ssl
Fixed typos in lib/ssh
Fixed typos in PKCS-8.asn1 file
Fixed typos in lib/parsetools
Fixed typos in lib/orber
Fixed typos in lib/mnesia
Fixed typos in lib/megaco
Fixed typos in lib/kernel
Fixed typos in lib/jinterface
Fixed typos in lib/inets
Fixed typos in lib/hipe
Fixed typos in lib/eunit
Fixed typos in lib/erl_interface
Fixed typos in lib/eldap
Fixed typos in lib/edoc
...
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A magic destructor can return 0 and thereby take control
and prolong the lifetime of a magic binary.
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* henrik/update-copyrightyear:
update copyright-year
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