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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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* hb/type_reference/OTP-8733:
reference() substituted for ref() in docs
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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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* 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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When building with "--as-needed" linker flags on Linux the build will
fail. This has now been fixed.
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* sverker/one_offheap_list/OTP-8737:
One off-heap list, to eliminate two words per ETS object.
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Merging the three off-heap lists (binaries, funs and externals) into
one list. This reduces memory consumption by two words (pointers) per
ETS object.
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* sverker/ets_select_hang/OTP-8732:
Fix ets:select hanging on ordered_set with empty list as key.
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* sverker/full_INTEGER_EXT/OTP-8540:
term_to_binary use all 32 bits of INTEGER_EXT
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* sverker/driver_int64_bug/OTP-8716:
Fix bug that caused faulty 64-bit integers from drivers.
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erl_db_tree.c incorrectly used NIL (empty list) as "lastkey" to mark
start of the iteration. A real NIL key could then cause a
select or match iteration to be restarted over and over again if the
last key before a trap happended to be NIL.
Changed NIL to THE_NON_VALUE. Should be ok as the initial key value can
never be put into any continuation tuple.
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* rani/sctp-udp-recv-error:
Fix inet_drv to detect passive mode UDP errors for SCTP builds
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* sd/epmd-stop-cli:
allow epmd -stop name to unregister a client from epmd
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Debug and patch by Per Hedeland for R13B04 on erlang-patches:
Connected UDP (and handling of any other errors in UDP recv())
is broken in passive mode for all SCTP-enabled builds.
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* se/http_response_empty_phrase:
{packet,http} allow empty response phrase
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Earlier, external format INTEGER_EXT was only produced for 28-bit
signed integers. Now full 32-bit signed integers are produced as
INTEGER_EXT to avoid the more costly SMALL_BIG_EXT format. Both old
and new code can read 32-bit INTEGER_EXT.
Also fixed integer encoding bugs in erl_interface erl_encode/erl_decode.
(Thanks to Alexander Demidenko for reporting)
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Final merge of all unexpected differences from dev to release.
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A user defined CPU topology set via a call to <seealso
marker="erlang#system_flag_cpu_topology">erlang:system_flag(cpu_topology,
CPUTopology)</seealso> was not properly verified, and could in worst case
cause an emulator crash. The emulator crash could only occur when a user
defined CPU topology already existed and was redefined.
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* se/port_SUITE_env:
fix open_port with many unset env vars
allow open_port with env vars with trailing '=' on Windows
OTP-8701 se/port_SUITE_env
open_port/2 with the spawn and spawn_executable options can include an
{env,Env} option. In some cases unsetting variables would not work on Unix
(typically if more variables were unset than were actually present in the
environment).
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* peppe/common_test_r14_dev_2:
Misc documentation updates
Add documentation for run_test program
Step vsn for test_server to 3.4
Make {repeat*,N} property in group execute the group N times exactly
Fix so that ct_run converts relative diretories in the code path to absolute
Fix bug in handling framework:end_tc timeouts
Fix bug that prevents the interactive shell mode to start properly
Fix failing multiply timetrap test case
Minor fixes in code and test suites
Add support for executing pre-loaded suites (e.g. modules loaded as binaries)
Add test suite for remote loading of binary suites
Fix error with {repeat,0} property in groups causing double iterations
Add support for config info functions (e.g. init_per_suite/0)
Add support for dynamic timetrap handling
Have end_per_testcase run even after timetrap_timeout and abort_testcase
Flush old DOWN messages in demonitor
Add groups in test specifications
Add new tests for test case groups and test specifications
Improve and fix various test suites
Add event_handler_init start flag that can pass init arguments to event handlers
...
OTP-8703 peppe/common_test_r14_dev_2
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Packet type 'http' for erlang:deocode:packet and gen_tcp allow a
response line with an empty phrase string, like
"HTTP/1.1 200\r\n".
Earlier, an empty phrase was only accepted if the status code
was followed by space or tab, like
"HTTP/1.1 200 \r\n".
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The erlang:open_port spawn and spawn_executable directives can include
an {env, Env} directive to set up environment variables for the
spawned process. Variables can be unset with {"NameOfVariable",false}.
A bug in ert/emulator/sys/unix/sys.c could cause unset variables
to not be unset. This would typically happen if there where more
variables to be unset than there where already set variables in the
destination evironment.
Fix this problem for unix and add a new regression test for it to
the port test suite. Windows does not seem to have the same problem.
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Same problem that Steve Vinoski fixed for Unix. Similar fix done in
erts/emulator/sys/win32/sys_env.c for Windows.
Copy-paste from his commit-message:
The erlang:open_port spawn and spawn_executable directives can include
an {env, Env} directive to set up environment variables for the
spawned process. A bug in ert/emulator/sys/unix/sys.c prevented
applications from using {env, Env} to set an environment variable
whose value ended with a '=' (equal sign) character; the code mistook
the trailing equal sign as an indication that an environment variable
was to be cleared from the environment of the spawned process.
For example, passing an {env, Env} of
{env, [{"foo", "bar="}]}
would result in the code in sys.c seeing a string of the form
"foo=bar="
The code would see the final '=' character and assume the directive
wanted to clear a variable named "foo=bar" from the environment of the
spawned process, rather than seeing it as a directive to set the
environment variable "foo" to the value "bar=".
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With -erl_args it's possible to divide the start options on the command line and this way specify explicitly which options are meant for Common Test, and which are meant for other OTP applications (or ERTS).
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