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rickard/r16/port-optimizations/OTP-10336
* rickard/port-optimizations/OTP-10336:
Change annotate level for emacs-22 in cerl
Update etp-commands
Add documentation on communication in Erlang
Add support for busy port message queue
Add driver callback epilogue
Implement true asynchronous signaling between processes and ports
Add erl_drv_[send|output]_term
Move busy port flag
Use rwlock for driver list
Optimize management of port tasks
Improve configuration of process and port tables
Remove R9 compatibility features
Use ptab functionality also for ports
Prepare for use of ptab functionality also for ports
Atomic port state
Generalize process table implementation
Implement functionality for delaying thread progress from unmanaged threads
Conflicts:
erts/doc/src/erl_driver.xml
erts/doc/src/erlang.xml
erts/emulator/beam/beam_bif_load.c
erts/emulator/beam/beam_bp.c
erts/emulator/beam/beam_emu.c
erts/emulator/beam/bif.c
erts/emulator/beam/copy.c
erts/emulator/beam/erl_alloc.c
erts/emulator/beam/erl_alloc.types
erts/emulator/beam/erl_bif_info.c
erts/emulator/beam/erl_bif_port.c
erts/emulator/beam/erl_bif_trace.c
erts/emulator/beam/erl_init.c
erts/emulator/beam/erl_message.c
erts/emulator/beam/erl_port_task.c
erts/emulator/beam/erl_process.c
erts/emulator/beam/erl_process.h
erts/emulator/beam/erl_process_lock.c
erts/emulator/beam/erl_trace.c
erts/emulator/beam/export.h
erts/emulator/beam/global.h
erts/emulator/beam/io.c
erts/emulator/sys/unix/sys.c
erts/emulator/sys/vxworks/sys.c
erts/emulator/test/port_SUITE.erl
erts/etc/unix/cerl.src
erts/preloaded/ebin/erlang.beam
erts/preloaded/ebin/prim_inet.beam
erts/preloaded/src/prim_inet.erl
lib/hipe/cerl/erl_bif_types.erl
lib/kernel/doc/src/inet.xml
lib/kernel/src/inet.erl
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Facts:
crypto nif-lib registers callback functions that openssl uses
for memory management and thread synchronization. The callback
functions can only be set once, openssl does not allow changing the
callback functions.
Problem:
If openssl is dynamicly linked to crypto, you might get s scenario
where the crypto lib is unloaded while leaving openssl loaded
with its old pointers to the unloaded crypto code intact.
If crypto is then reloaded (by init:restart() for example), the crypto
nif-lib might get relocated at a different address. crypto calls
openssl which in turn calls the old invalid callback functions...kaboom.
Solution:
Break apart the callback functions into a separate dynamic lib that
crypto loads with dlopen. When crypto is unloaded the callback lib is
left in place to be reused if/when crypto is loaded again.
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Conflicts:
erts/doc/src/erlang.xml
erts/preloaded/ebin/init.beam
lib/kernel/doc/src/os.xml
lib/stdlib/test/filename_SUITE.erl
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Due to various operating systems (in both the DTrace and SystemTap
worlds) not fully supporting DTrace probes (or SystemTap-compatibility
mode probes) in shared libraries, we relocate those probes to the
statically-linked virtual machine. This could be seen as pollution
of the pristine VM by a (yet) experimental feature. However:
1. This code can be eliminated completely by the C preprocessor.
2. Leaving the probes in the dyntrace NIF shared library simply
does not work correctly on too many platforms.
*Many* thanks to Macneil Shonle at Basho for assisting when my
RSI-injured fingers gave out.
Tested on:
* CentOS 5, SystemTap 1.3
* Solaris 10 (note)
* Solaris 11
* OpenIndiana 151
* SmartOS 20120809T221258Z
* FreeBSD 9.0-RELEASE (note)
I had hoped to be able to test CentOS 6 + SystemTap 1.7, but the
details of dealing with all dependencies for a 2.6.32-279.5.1.el6.x86_64
kernel are too time consuming right now.
(note: Solaris 10 and FreeBSD 9.0-RELEASE can take a long time to compile)
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Change the data structures for breakpoints to make it possible
(in a future commit) to manage breakpoints without taking down the
system to single-scheduling mode.
The current "breakpoint wheel" data structure (a circular,
double-linked list of breakpoints) was invented before the
SMP emulator. To support it in the SMP emulator, there is essentially
one breakpoint wheel per scheduler. As more breakpoint types have
been added, the implementation has become messy and hard to understand
and maintain.
Therefore, the time for a rewrite has come. Use one struct to hold
all breakpoint data for a breakpoint in a function. Use a flag field
to indicate what different type of break actions that are enabled.
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* rickard/proc-sched/OTP-9892:
Teach etp-commands to understand new emulator internal data structures
Optimize process state changes
Optimize process table access
Implement possibility to use ordinary mutexes as process locks
Conflicts:
erts/emulator/beam/erl_alloc.types
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Conflicts:
erts/emulator/beam/beam_emu.c
erts/emulator/beam/bif.tab
erts/preloaded/ebin/prim_file.beam
lib/hipe/cerl/erl_bif_types.erl
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User tags in a dynamic trace enabled VM are spread throughout the system
in the same way as seq_trace tokens. This is used by the file module
and various other modules to get hold of the tag from the user process
without changing the protocol.
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Add probes to the virtual machine, except (mostly) the efile_drv.c
driver and other file I/O-related source files.
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Rename lock_code_ix as seize_code_write_permission. Don't want to call
it a "lock" as it can be held between schedulings and different threads
and is not managed by lock checker.
Rename "activate" staging as "commit" staging. Why not be consistent
and use git terminology all the way.
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We want to avoid the race when trace settings are done in the time gap
while a code stager process is waiting for thread process before
commiting and releasing code_ix lock.
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* sverk/deprecate-nif-reload:
erts: Deprecate the NIF reload mechanism
OTP-9771
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Almost all uses of the 'long' datatype is removed from VM and tests
Emulator test now runs w/o drivers crashing
Nasty abs bug fixed in VM as well as type errors in allocator debug functions
Still one allocator test that fails, domain knowledge is needed to fix that.
Fix type inconsistency in beam_load causing crashes
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Can still not setup -a, but cerl works.
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Still does not run, just compiles.
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The reload mechanism is an odd feature that does not harmonize
with how module upgrade is otherwise done. We do not want its presence
to hinder future development of code loading and upgrade.
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Inlining was not done in a portable way. clang follows the C99
semantics for inlining ('inline' essentially implies 'static' in
C99, but not in GCC), so bp_sched2ix() was not visible outside
beam_bp.c. Since the function need to be used from more than one
source file, put the function definition in the beam_bp.h header
file. Also, give it an 'erts_' prefix since it is globally visible.
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* rickard/thr-progress-block/OTP-9631:
Replace system block with thread progress block
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The ERTS internal system block functionality has been replaced by
new functionality for blocking the system. The old system block
functionality had contention issues and complexity issues. The
new functionality piggy-backs on thread progress tracking functionality
needed by newly introduced lock-free synchronization in the runtime
system. When the functionality for blocking the system isn't used
there is more or less no overhead at all. This since the functionality
for tracking thread progress is there and needed anyway.
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* sverk/enif_inspect-memleak/OTP-9668:
erts: Fix memory leak of enif_inspect_* on independent environment
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Affects enif_inspect_iolist_as_binary() on iolists
and enif_inspect_binary() on byte-unaligned binaries.
Also need to allocate inspection buffers in ERTS_ALC_T_NIF for
process independent environments, as we don't know when and where
the environment will be freed.
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* fm/enif_is_number:
Add NIF function enif_is_number
Conflicts:
erts/emulator/beam/erl_nif_api_funcs.h
OTP-9629
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In 64bits machines the Sint type has a size of 8 bytes,
while on 32bits machines it has a 4 bytes size.
enif_compare was ignoring this and therefore returning
incorrect values when the result of the CMP function
(which returns a Sint value) doesn't fit in 4 bytes.
For example, passing the operands -1294536544000 and
-1178704800000 to enif_compare would trigger the bug.
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Conflicts:
erts/emulator/test/nif_SUITE.erl
erts/emulator/test/nif_SUITE_data/nif_SUITE.c
sverker/enif_make_int64-halfword/OTP-9394
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The bug was creating an invalid bignum instead of a small integer,
causing strange comparing behavior (=:= failed but == succeeded).
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This function allows for easily determining if a term represents
or not a number (integer, float, small or big).
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The io_list_len() function returns an int, where a negative return
value indicates a type error. One problem is that an int only consists
of 32 bits in a 64-bit emulator. Changing the return type to Sint
will solve that problem, but in the 32-bit emulator, a large iolist
and a iolist with a type error will both return a negative number.
(Noticed by Jon Meredith.)
Another problem is that for iolists whose total size exceed the
word size, the result would be truncated, leading to a subsequent
buffer overflow and emulator crash.
Therefore, introduce the new erts_iolist_size() function which
returns a status indication and writes the result size through
a passed pointer. If the result size does not fit in a word,
return an overflow indication.
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Add the enif_is_exception function to allow callers to determine
whether an ERL_NIF_TERM represents an exception. (Currently the only
supported exception is badarg since only enif_make_badarg exists, but
this will likely be expanded in future releases.) This allows NIF code
to call other NIF functions that return ERL_NIF_TERM and properly
check to see if the returned terms are exceptions. Without the
enif_is_exception function, developers have to create their own means
of checking whether a function creates an exception, such as returning
boolean success/failure indicators or some other special value
indicating that an exception is in effect.
The declaration of enif_is_exception in erl_nif_api_funcs.h respects
the order of declarations required to keep compatibility on Windows.
Add a new test to verify the operation of enif_is_exception.
Modify the erl_nif man page to add a description of enif_is_exception
and also to clarify the requirements of calling the enif_make_badarg
function. If code calls enif_make_badarg, the env passed in gets set
with exception information and so the return value of the calling
function MUST be the badarg term returned from enif_make_badarg. Also
clarify that the result of enif_make_badarg may be passed only to
enif_is_exception and not to any other NIF API functions.
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Introduce HAllocX to allocate heap fragments with a larger capacity
than requested and by that reduce the number of fragments allocated.
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In halfword emulator, make ETS use a variant of the internal term
format that uses relative offsets instead of absolute pointers. This
will allow storage in high memory (>4G). Preprocessor macros (like
list_val_rel(TERM,BASE)) are used to make normal (fullword) emulator
almost completely unchanged while still reusing most of the code.
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* sverker/NIF-64bit-integers/OTP-8746:
Make windows 64bit types be declared more consistently
Teach Windows about the int64 functions
NIF doc official support note
NIF 64-bit integer support
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