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Use erts_(v)snprintf to ensure no buffer overruns in debug printouts.
Disallow everything except port and name requests from remote nodes.
Disallow kill command even from localhost if alive nodes exist.
-relaxed_command_check when starting epmd returns the possibility to
kill this epmd when nodes are alive (from localhost).
Disallow stop command completely except if -relaxed_command_check is given
when epmd was started.
Environment variable ERL_EPMD_RELAXED_COMMAND_CHECK can be set to always get
-relaxed_command_check.
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* rickard/cpu-info-unbind/8765:
Fix erroneous error reports about unbind failure
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On platforms where binding of schedulers is not supported, numerous error
reports on the form "Scheduler <N> failed to unbind from cpu -1: enotsup"
were erroneously issued. This bug was introduced in the 'dev' branch
before R14B (commit 1b273b618002d65159453fdfb9520a9476e4423a). That is,
the bug has never been seen in a released runtime system.
Reported-By: Tuncer Ayaz
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ArgumentList -> Args
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* pan/ets_binary_overhead/OTP-8762:
Remove binary overhead counter from ets objects
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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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* sverker/win-virtualization-off/OTP-7405:
Teach XP to ignore virtualization part of manifest
Turn off windows "virtualiztion"
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* egil/R14A/binary-gc-wrap/OTP-8730:
Increase vheap counter to Uint64
Fix wrapping in next vheap calculation
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* pan/local_univ_time_bsd/OTP-8580:
Teach erl_time_sup to handle timezones w/o DST on FreeBSD as on other platforms
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* pan/list_to_float/OTP-7178:
Teach Unix sys_float.c to ignore underflow in list_to_float and return 0.0
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* rickard/cpu-info/OTP-8765:
Initialize environment functionality after thread lib
Fix faulty assertions
Implement automatic detection of CPU topology on Windows
Make it possible to reread and update detected CPU information
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An assertion failed due to the thread library not being
initialized when initializing an rwmutex. This was however
harmless.
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The CPU topology is now automatically detected on Windows
systems with less than 33 logical processors. The runtime system
will now, also on Windows, by default bind schedulers to logical
processors using the 'default_bind' bind type if the amount of
schedulers is at least equal to the amount of logical processors
configured, binding of schedulers is supported, and a CPU topology
is available at startup.
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Building in a source tree without prebuilt platform independent
build results failed on the SSL examples when building on
Windows.
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Building in a source tree without prebuilt platform independent
build results failed on the SSL examples when cross building.
This has been solved by not building the SSL examples during a
cross build.
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* rickard/nptl-configure/OTP-8774:
Removed unused define
Fix propagation of nptl info
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* rickard/erts-poll-race/OTP-8773:
Fix race in erts_poll()
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A race condition in erts_poll() could cause
delay of poll for I/O.
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* ms/suppress-epmd-startup-message:
epmd: suppress startup message
OTP-8775
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* bjorn/solaris-fp-exception:
Solaris/x86: Handle floating point exceptions properly in driver threads
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* bjorn/remove-elib_malloc/OTP-8764:
erts: Remove broken elib_malloc
erts: Remove the unused mem_drv driver
erts: Remove stray pre-ISO-C compatibility macros
erts: Remove unused decl.h
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* rickard/fix-faulty-assert/OTP-8759:
Fix faulty no_empty_run_queues assertion
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As the overhead counter got larger and never really was needed in ets objects,
I removed them.
A few stray comments of XXX:PaN type from halfword dev removed in the process.
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* hb/type_reference/OTP-8733:
reference() substituted for ref() in docs
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Calling erlang:system_info/1 with the new argument 'update_cpu_info'
will make the runtime system reread and update the internally stored
CPU information. For more information see the documentation of
erlang:system_info(update_cpu_info).
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On Solaris/x86, the floating point exceptions bits seems to
be propagated to child threads, so if scheduler threads
use floating points exceptions, also driver threads will
have floating points exception enabled.
The problem is that erts_thread_init_float() has not been
called for driver threads, and because of that matherr()
will crash when called.
Fix matherr() so that it will work even if erts_thread_init_float()
has not been called.
This fix was suggested by Mikael Pettersson.
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elib_malloc is an alternate memory allocator that
is no longer possible to build.
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The mem_drv driver was only useful when elib_malloc was
active.
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A long time ago, the Erlang run-time system could be
build with pre-ANSI/ISO-C (K&R) C compilers, but that is
no longer possible. Remove the remaining uses of the
compatibility macros that made it possible that possible.
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The header file erts/emulator/beam/decl.h is no longer used.
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It's been reported that HiPE-enabled Erlang VMs running on BSD
systems sometimes generate messages like
Yikes! erts_alloc() returned misaligned address 0x8016a512c
These originate from hipe_bif0.c:hipe_bifs_alloc_data_2().
A native code module has an associated data area of some
size and alignment. In the case where the size is zero,
the alignment is irrelevant, but the allocation BIF checks
it anyway. The warning then triggers on systems where
malloc(0) returns blocks with less alignment than we
(erroneously) expected.
The fix is to simply skip the allocation in this case and
return NULL. The loader won't actually use the address in
this case so that's safe. This is also an optimization since
it avoids allocating memory that cannot be used, and it avoids
fragmenting the system heap with useless tiny blocks.
A second problem is that the warning message failed to
identify its origin. Fixed by prefixing the message by
the BIF's name rather than the silly Yikes! string.
Tested and confirmed to solve the original reporter's problem.
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This will reduce the risk of integer wrapping in bin vheap counting.
The vheap size series will now use the golden ratio instead of doubling
and fibonacci sequences.
OTP #8730
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OTP #8730
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* bjorn/remove-obsolete-driver-support/OTP-8758:
Remove obsolete/driver.h and the associated functionality
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For a short period of time no_empty_run_queues may have
been increased twice for a specific run queue. Two
assertions did not take this into account.
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The obsolete/driver.h header file has been obsolete
since R8B.
Remove that file, along with obsolete thread APIs for
drivers in the emulator and the test cases.
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* rickard/trailing-data-alignment/OTP-8754:
Align trailing message data for all types of structures
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* rickard/ethread-rewrite/OTP-8544:
Rewrite ethread library
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Large parts of the ethread library have been rewritten. The
ethread library is an Erlang runtime system internal, portable
thread library used by the runtime system itself.
Most notable improvement is a reader optimized rwlock
implementation which dramatically improve the performance of
read-lock/read-unlock operations on multi processor systems by
avoiding ping-ponging of the rwlock cache lines. The reader
optimized rwlock implementation is used by miscellaneous
rwlocks in the runtime system that are known to be read-locked
frequently, and can be enabled on ETS tables by passing the
`{read_concurrency, true}' option upon table creation. See the
documentation of `ets:new/2' for more information.
The ethread library can now also use the libatomic_ops library
for atomic memory accesses. This makes it possible for the
Erlang runtime system to utilize optimized atomic operations
on more platforms than before. Use the
`--with-libatomic_ops=PATH' configure command line argument
when specifying where the libatomic_ops installation is
located. The libatomic_ops library can be downloaded from:
http://www.hpl.hp.com/research/linux/atomic_ops/
The changed API of the ethread library has also caused
modifications in the Erlang runtime system. Preparations for
the to come "delayed deallocation" feature has also been done
since it depends on the ethread library.
Note: When building for x86, the ethread library will now use
instructions that first appeared on the pentium 4 processor. If
you want the runtime system to be compatible with older
processors (back to 486) you need to pass the
`--enable-ethread-pre-pentium4-compatibility' configure command
line argument when configuring the system.
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Alignment of trailing data in messages has been adjusted.
This in order to be able to pass data of any type as
trailing data in the future.
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Running transient distributed Erlang nodes can generate a large number
of informational messages to syslog. Modify epmd to log the startup
message only when passed the debug switch.
Reported-By: Sergey Samokhin
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