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Add a check to enif_make_double to see if its double argument is
infinity or NaN, returning a badarg exception if it is. Change the
erl_nif documentation to specify that enif_make_double returns a
badarg exception if its double argument is either infinity or NaN. Add
tests to nif_SUITE for this change.
Add checks to the enif_make* functions for atoms to prevent the
creation of atoms whose name lengths are greater than the allowed
maximum atom length. The enif_make_atom and enif_make_atom_len
functions now return a badarg exception if the input string is too
long. The enif_make_existing_atom and enif_make_existing_atom_len
functions return false if the input string is too long. Change the
erl_nif documentation to reflect the changes to these functions. Add
tests to nif_SUITE for these changes.
Add a field to ErlNifEnv to track that a NIF has raised an exception
via enif_make_badarg. If a NIF calls enif_make_badarg but then ignores
its return value and instead tries to return a non-exception term as
its return value, the runtime still raises a badarg. This is needed to
prevent enif_make_badarg values resulting from calls to
enif_make_double, enif_make_atom, or enif_make_atom_len from being
erroneously stored within other terms and returned from a NIF. Calling
enif_make_badarg but not returning its return value has been
documented as being illegal ever since enif_make_badarg was added, but
the runtime has not enforced it until now. Add tests for regular and
dirty NIFs to ensure that calls to enif_make_badarg result in badarg
exceptions even if a NIF fails to return the result of
enif_make_badarg as its return value. Add documentation to
enif_make_badarg to specify that calling it raises a badarg even if a
NIF ignores its return value.
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* mikpe/fix-eacces-spelling:
fix eacces spelling
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* siri/no-unicode-atoms/OTP-12172:
Remove comments about unicode atoms in OTP 18
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There was once a plan to implement support for unicode atoms in OTP
18. This plan has been stopped until further notice, and the
information about this is now removed from the documentation.
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OTP-12298
* lemenkov/expose_nif_version:
Expose NIF version
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Conflicts:
OTP_VERSION
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This patch allows checking for NIF API version in a way similar to
driver version. E.g. by calling erlang:system_info(nif_version).
Signed-off-by: Peter Lemenkov <[email protected]>
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* rickard/maint-17/eager-check-io/OTP-12117:
No eager check I/O on OSE
Introduce support for eager check I/O scheduling
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* vinoski/crashdump-sigusr1:
Clarify the use of SIGUSR1 for forcing crash dumps
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The crash_dump document mentions indirectly that delivering a SIGUSR1 to a
running emulator process can force it to crash dump. Clarify that text to
make it clear SIGUSR1 can be used for that purpose, and also add a similar
note about using SIGUSR1 to the erl documentation.
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The documentation for driver_async() still referred to the return value of
the function as a "handle", which is no longer meaningful since
driver_async_cancel() was deprecated and removed. Modify the documentation
to simply indicate that the driver_async() return value will be -1 if it
fails.
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rickard/maint-17/eager-check-io/OTP-12117
* rickard/eager-check-io/OTP-12117:
Introduce support for eager check I/O scheduling
Conflicts:
erts/emulator/beam/erl_bif_info.c
erts/emulator/beam/erl_init.c
erts/emulator/beam/erl_process.c
erts/preloaded/ebin/erlang.beam
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and add 'dirty_scheduler_support' to ErlNifSysInfo
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In the #erlang IRC channel Anthony Ramine once mentioned the idea of
allowing a NIF to use an emulator trap, similar to a BIF trap, to schedule
another NIF for execution. This is exactly how dirty NIFs were implemented
for Erlang/OTP 17.0, so this commit refactors and generalizes that dirty
NIF code to support a new enif_schedule_nif() API function.
The enif_schedule_nif() function allows a long-running NIF to be broken
into separate NIF invocations. The NIF first executes part of the
long-running task, then calls enif_schedule_nif() to schedule a NIF for
later execution to continue the task. Any number of NIFs can be scheduled
in this manner, one after another. Since the emulator regains control
between invocations, this helps avoid problems caused by native code tying
up scheduler threads for too long.
The enif_schedule_nif() function also replaces the original experimental
dirty NIF API. The function takes a flags parameter that a caller can use
to indicate the NIF should be scheduled onto either a dirty CPU scheduler
thread, a dirty I/O scheduler thread, or scheduled as a regular NIF on a
regular scheduler thread. With this change, the original experimental
enif_schedule_dirty_nif(), enif_schedule_dirty_nif_finalizer() and
enif_dirty_nif_finalizer() API functions are no longer needed and have been
removed. Explicit scheduling of a dirty NIF finalization function is no
longer necessary; if an application wants similar functionality, it can
have a dirty NIF just invoke enif_schedule_nif() to schedule a non-dirty
NIF to complete its task.
Lift the restriction that dirty NIFs can't call enif_make_badarg() to raise
an exception. This was a problem with the original dirty NIF API because it
forced developers to get and check all incoming arguments in a regular NIF,
and then schedule the dirty NIF which then had to get all the arguments
again. Now, the argument checking can be done in the dirty NIF and it can
call enif_make_badarg() itself to flag incorrect arguments.
Extend the ErlNifFunc struct with a new flags field that allows NIFs to be
declared as dirty. The default value for this field is 0, indicating a
regular NIF, so it's backwards compatible with all existing statically
initialized ErlNifFunc struct instances, and so such instances require no
code changes. Defining the flags field with a value of
ERL_NIF_DIRTY_JOB_CPU_BOUND indicates that the NIF should execute on a
dirty CPU scheduler thread, or defining it with a value of
ERL_NIF_DIRTY_JOB_IO_BOUND indicates that the NIF should execute on a dirty
I/O scheduler thread. Any other flags field value causes a NIF library
loading error.
Extend the ErlNifEntry struct with a new options field that indicates
whether a NIF library was built with support for optional features such as
dirty NIFs. When a NIF library is loaded, the runtime checks the options
field to ensure compatibility. If a NIF library built with dirty NIF
support is loaded into a runtime that does not support dirty NIFs, and the
library defines one or more ErlNifFunc entries with non-zero flags fields
indicating dirty NIFs, a NIF library loading error results. There is no
error if a NIF library built with dirty NIF support is loaded into a
runtime that does not support dirty NIFs but the library does not have any
dirty NIFs. It is also not an error if a library without dirty NIF support
is loaded into a runtime built with dirty NIF support.
Add documentation and tests for enif_schedule_nif().
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* nox/reedr-logging/OTP-12115:
Add number of entries to mnesia copy debug message
Add thread index to allocator enomem dump slogan
Add run queue index to process dump info
Add missing error string to syslog logging in epmd
Demote rare debug slogan of message discarding to debug build
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OTP-12052
* derek121/epmd-docs-2:
Fix minor grammatical errors in epmd docs
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Conflicts:
erts/doc/src/notes.xml
erts/preloaded/ebin/prim_inet.beam
erts/vsn.mk
lib/kernel/doc/src/notes.xml
lib/kernel/vsn.mk
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Small grammar changes.
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OTP-12052
* vinoski/vinoski/erl-sdio-option:
add missing description for erl +SDio option
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* nox/filelib-wildcard-broken-link:
Update stdlib appup file
Update runtime dependencies
Update preloaded
Add tests of filelib and symlinks
Fix handling of broken symlinks in filelib
Conflicts:
erts/preloaded/ebin/erl_prim_loader.beam
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This fixes a bug introduced in f11aabdc9fec593c31e6c4f3fa25c1707e9c35df where
filelib:eval_read_file_info/2 was made to use file:read_link_info/1 to never
follow symlinks. This fixed wildcard/1 but broke every other function using
eval_read_file_info/2.
Reported-by: Louis-Philippe Gauthier
Reported-by: Danil Zagoskin
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Specify in the documentation that erlang:statistics(runtime) returns milliseconds.
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Add explanatory text for the erl +SDio option, which is used to set the
number of dirty I/O schedulers.
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* sverk/etp-alloc-stats:
erts: Fix documentation for no of default allocator instances
erts: Add etp-alloc-stats and etp-alloc-instances
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ll_alloc does not default to single instance since 17.0
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* etsukata/system_info_tolerant_timeofday/OTP-11970:
Add erlang:system_info(tolerant_timeofday)
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* bjorn/erts/spawn_opt-doc/OTP-11849:
Document that spawn_opt/5 does not support the 'monitor' option
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Add erlang:system_info(tolerant_timeofday), an API to check whether
compensation for sudden changes of system time is enabled or not.
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* egil/maps-doc:
doc: Add Maps example for sequential programming
doc: Mention map expressions and map guards
doc: Add maps to reference manual
edoc: Add map/0 as a new predefined type
doc: Descripe Maps type syntax
doc: Clearify language of user-defined attributes
doc: Document Maps datatype in reference manual
erts: Document map guard functions
erts: Fix is_map/1 spec
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* pf/document-escript-feature-only-present-in-examples/OTP-11827:
Document an escript:create/2 hidden feature
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