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Magic references are *intentionally* indistinguishable from ordinary
references for the Erlang software. Magic references do not change
the language, and are intended as a pure runtime internal optimization.
An ordinary reference is typically used as a key in some table. A
magic reference has a direct pointer to a reference counted magic
binary. This makes it possible to implement various things without
having to do lookups in a table, but instead access the data directly.
Besides very fast lookups this can also improve scalability by
removing a potentially contended table. A couple of examples of
planned future usage of magic references are ETS table identifiers,
and BIF timer identifiers.
Besides future optimizations using magic references it should also
be possible to replace the exposed magic binary cludge with magic
references. That is, magic binaries that are exposed as empty
binaries to the Erlang software.
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* maint:
Atomic reference count of binaries also in non-SMP
Conflicts:
erts/emulator/beam/erl_fun.c
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OTP-14202
* rickard/binary-refc:
Atomic reference count of binaries also in non-SMP
Conflicts:
erts/emulator/beam/beam_bp.c
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NIF resources was not handled in a thread-safe manner in the runtime
system without SMP support.
As a consequence of this fix, the following driver functions are now
thread-safe also in the runtime system without SMP support:
- driver_free_binary()
- driver_realloc_binary()
- driver_binary_get_refc()
- driver_binary_inc_refc()
- driver_binary_dec_refc()
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* maint:
Dirty schedulers should not touch scheduler data pointed to by process struct
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OTP-14122
* rickard/ds-fix:
Dirty schedulers should not touch scheduler data pointed to by process struct
Conflicts:
erts/emulator/beam/erl_process.c
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* maint:
Use a hole-marker that cannot be mistaken for a valid term on the heap
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* rickard/hole-marker:
Use a hole-marker that cannot be mistaken for a valid term on the heap
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OTP-14201
* hm/escript-emulator:
escript: Handle symbolic link to a standalone escript
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This extends the shell function c/1 and c/2 so that if the argument is a
module name instead of a file name, it automatically locates the .beam file
and the corresponding source file, and then recompiles the module using the
same compiler options (plus any options passed to c/2). If compilation
fails, the old beam file is preserved. Also adds c(Mod, Opts, Filter),
where the Filter argument allows you to remove old compiler options before
the new options are added.
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* maint:
Store messages for 'rex' and 'error_logger' off heap
file: match enoent and enotdir in path_open
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Store messages for 'rex' and 'error_logger' off heap
OTP-14192
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file: match enoent and enotdir in path_open
OTP-14191
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When the 'maps' option is given, the SEQUENCE and SET types are
represented as maps instead of as records. Optional and default values
must be not be given as asn1_NOVALUE or asn1_DEFAULT in a map passed
to the M:encode/2 function; they must be omitted from the
map. Similarly, when decoding missing values will be omitted from the
map.
No .hrl files will be generated when the 'maps' options is used.
That means values in an ASN.1 module must be retrieved by calling the
appropriate function in generated module.
Since we one day hope to get rid of the options 'compact_bit_string',
'legacy_bit_string', and 'legacy_erlang_types', we will not allow them
to be combined with the 'maps' option.
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This reverts commit 6847d9223420fb86cdf72f0e608a5f41a2673053.
The removal of ssh-dss seems to give a too high risk of failing customer systems. Needs to be properly deprecated.
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* hasse/dialyzer/memory_opt/OTP-14127:
dialyzer: Attempt to reduce memory consumption
dialyzer: Do not spawn all workers at once
dialyzer: Write PLT in subprocess
dialyzer: Remove code for non-started workers
dialyzer: Sort graphs topologically
dialyzer: Compress some PLT tables
dialyzer: Check return value of digrahp:add_edge()
dialyzer: Use less memory for the PLT when analyzing
typer: Fix a bug regarding the -T option
dialyzer: Do not keep the code server's type info on the heap
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This moves, extends and exports functionality that previously existed only
internally in filename:find_src/1/2, adding the ability to automatically
substitute file suffixes and use different rules for different suffixes.
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* egil/20/erts/signal-service/OTP-14186:
kernel: Document signal server
erts: Use os module instead of erts_internal for set_signal/2
erts: Do not handle SIGILL
erts: Fix thread suspend in crashdump
erts: Do not enable SIGINT
erts: Use generic signal handler
erts: Add OS signal tests
erts: Handle SIGUSR1 via signal service instead
erts: Handle SIGTERM via signal service instead
kernel: Add gen_event signal server and default handler
erts: Add SIGHUP signal handler
erts: Remove whitespace errors
Conflicts:
erts/emulator/beam/bif.tab
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Use explicit file names of PLTs so that daily builds&tests running
simultaneously under the same user do not interfere with each other
("$HOME/.dialyzer_plt" is the default PLT name).
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As a preparation for supporting maps in a future commit, refactor
the functions for encoding optional values.
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Most options to the code generation pass are passed through the
process dictionary. At the same time, an Erule or Erules argument
is passed to most code generation functions. The Erule argument
is only an atom indicating the encoding rules ('ber', 'per', or
'uper').
Introduce a new record #gen{} to contain code generation options
and parameters. Pass it as the Erule argument (renaming it to Gen
in functions that we will have to touch anyway). In this commit,
eliminate the use of the variable 'encoding_options' in the process
dictionary.
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asn1ct_check numbers all components in SEQUENCEs and SETs, except
for the associated sequence for INSTANCE OF. Remove this exception
so that the code generation pass can depend on SEQUENCEs being
numbered.
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