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2018-10-17Merge branch 'sverker/erts/debug_free_null' into maintSverker Eriksson
* sverker/erts/debug_free_null: erts: Fix bug in debug_free for NULL pointer
2018-10-17Merge branch 'igor/tcp-nopush-ERL-698/OTP-15357' into maintJohn Högberg
* igor/tcp-nopush-ERL-698/OTP-15357: "cork" tcp socket around file:sendfile Add nopush TCP socket option
2018-10-15erts: Fix bug in debug_free for NULL pointerSverker Eriksson
causing ASSERT in sys_memset to fail.
2018-10-12Merge branch 'maint-21' into maintRickard Green
* maint-21: Updated OTP version Prepare release erts: Fix UNC path handling on Windows erts: Fix a compiler warning eldap: Fix race at socket close Fix bug for sockopt pktoptions on BSD erts: Fix memory leak on file read errors
2018-10-12Merge branch 'john/erts/fix-unc-paths-windows/OTP-15333/ERL-737' into maint-21Erlang/OTP
* john/erts/fix-unc-paths-windows/OTP-15333/ERL-737: erts: Fix UNC path handling on Windows erts: Fix a compiler warning
2018-10-12Merge branch 'raimo/BSD-sockopt-pktoptions/ERIERL-187/OTP-14297' into maint-21Erlang/OTP
* raimo/BSD-sockopt-pktoptions/ERIERL-187/OTP-14297: Fix bug for sockopt pktoptions on BSD
2018-10-12Merge pull request #1974 from ↵Raimo Niskanen
RaimoNiskanen/raimo/getifaddrs-netns/ERIERL-189/OTP-15121 Implement {netns,NS} option for inet:getifaddrs/1 and friends
2018-10-11erts: Fix UNC path handling on WindowsJohn Högberg
This is unlikely to be the last of the path problems seen after OTP 21, and I'm starting to regret my decision to unconditionally use long paths. The idea to hit all long-path problems all the time was good in theory as it makes such bugs far more visible, but there just aren't enough people who test pre-release versions on Windows, making this the world's slowest game of whack-a-mole.
2018-10-11erts: Fix a compiler warningJohn Högberg
This would've been a bug if the value was used.
2018-10-11Add nopush TCP socket optionIgor Slepchin
This translates to TCP_CORK on Linux and TCP_NOPUSH on BSD. In effect, this acts as super-Nagle: no partial TCP segments are sent out until this option is turned off. Once turned off, all accumulated unsent data is sent out immediately. The latter is *not* the case on OSX, hence the implementation ignores "nopush" on OSX to reduce confusion.
2018-10-09Merge branch 'sverker/erts/ets-select_replace-bug/OTP-15346' into maintSverker Eriksson
* sverker/erts/ets-select_replace-bug/OTP-15346: erts: Fix bug in ets:select_replace for bound key
2018-10-09erts: Fix bug in ets:select_replace for bound keySverker Eriksson
which may cause following calls to ets:next or ets:prev to fail.
2018-10-02Implement {netns,NS} option for inet:getifaddrs/1Raimo Niskanen
Also implement the same option for the legacy undocumented functions inet:getif/1,getiflist/1,ifget/2,ifset/2. The arity 1 functions had before this change got signatures that took a socket port that was used to do the needed syscall, so now the signature was extended to also take an option list with the only supported option {netns,Namespace}. The Socket argument variant remains unsupported. For inet:getifaddrs/1 the documentation file was changed to old style function name definition so be able to hide the Socket argument variant that is visible in the type spec. The arity 2 functions had got an option list as second argument. This list had to be partitioned into one list for the namespace option(s) and the other for the rest. The namespace option list was then fed to the already existing namespace support for socket opening, which places the socket in a namespace and hence made all these functions that in inet_drv.c used getsockopt() work without change. The functions that used getifaddrs() in inet_drv.c had to be changed in inet_drv.c to swap namespaces around the getifaddrs() syscall. This functionality was separated into a new function call_getifaddrs().
2018-10-01Fix bug for sockopt pktoptions on BSDRaimo Niskanen
The macros for the BSD style option names had accidentally wound up outside the option parsing loop, causing unclear behaviour and Valgrind errors.
2018-09-26erts: Fix memory leak on file read errorsJohn Högberg
2018-09-21Update copyright yearHenrik Nord
2018-09-19Merge branch 'raimo/receive-TOS-TCLASS/ERIERL-187/OTP-15145' into maintRaimo Niskanen
* raimo/receive-TOS-TCLASS/ERIERL-187/OTP-15145: Elaborate the disclaimer for 'pktoptions' Improve platform filter Fix endianness bug for CMSG parsing
2018-09-19Fix endianness bug for CMSG parsingRaimo Niskanen
2018-09-18Merge branch 'sverker/erts/robustify-dist-entry-states/OTP-15297' into maintSverker Eriksson
* sverker/erts/robustify-dist-entry-states/OTP-15297: erts: Refactor port dist_entry & conn_id into PRTSD Remove ugly fail case macros Consolidate distribution entry state transitions erts: Fix bug in undocumented system_flag(scheduling_statistics)
2018-09-18Merge 'sverker/erts/fix-aborted-pending-connection-race/OTP-15296'Sverker Eriksson
2018-09-18erts: Refactor port dist_entry & conn_id into PRTSDSverker Eriksson
spelled out as "port specific data".
2018-09-18Remove ugly fail case macrosSverker Eriksson
2018-09-18Consolidate distribution entry state transitionsSverker Eriksson
* Make connection_id part of the distribution handle as {ConnId, DistEntry} in order for BIFs to verify correct connection. * Make distribution handle opaque to net_kernel. * Remove some unsafe lockless reads of DistEntry.flags * Change state ERTS_DE_STATE_EXITING to be more of an internal state that prevents erts from enqueue, encode or schedule new data to be sent. Otherwise it should behave like ERTS_DE_STATE_CONNECTED.
2018-09-17Merge branch 'raimo/receive-TOS-TCLASS/ERIERL-187/OTP-15145' into maintRaimo Niskanen
* raimo/receive-TOS-TCLASS/ERIERL-187/OTP-15145: Write testcases for recvtos and friends Fix term buffer overflow bug Fix documentation due to feedback Implement socket option recvtos and friends
2018-09-17Merge branch 'john/erts/improve-list-reverse-trapping/OTP-15199' into maintJohn Högberg
* john/erts/improve-list-reverse-trapping/OTP-15199: Improve trapping in lists:reverse/2 Fix unsafe use of lists:reverse/1
2018-09-13Improve trapping in lists:reverse/2John Högberg
If the process had more free space than reductions it could run a lot longer than it was supposed to. It didn't honor the number of reductions going in either, nor did it bump reductions when returning its result or erroring out. This commit also removes this function from a work function in scheduler_SUITE as it's extremely sensitive to the number of reductions spent in the test, causing equal_and_high_with_part_time_max to fail on some machines.
2018-09-12Merge branch 'maint-21' into maintRickard Green
* maint-21: Updated OTP version Update release notes Update version numbers erts: Fix "Prevent inconsistent node lists" fix Fix include-path regression caused by dd0a39c Restore default SIGTERM behaviour for port programs
2018-09-11erts: Fix bug in undocumented system_flag(scheduling_statistics)Sverker Eriksson
Uses port specific data out of bounds.
2018-09-11Merge branch 'sverker/erts/fix-aborted-pending-connection-race/OTP-15296' ↵Erlang/OTP
into maint-21 * sverker/erts/fix-aborted-pending-connection-race/OTP-15296: erts: Fix "Prevent inconsistent node lists" fix
2018-09-11erts: Fix "Prevent inconsistent node lists" fixSverker Eriksson
done in a31216200bdee2c04b3fb3ae5e26607674715c8a that could cause a new pending connection to be incorrectly aborted.
2018-09-11Fix term buffer overflow bugRaimo Niskanen
2018-09-10Restore default SIGTERM behaviour for port programsRickard Green
erl_child_setup program ignores TERM signals as of ERTS version 10.0 (cff8dce0). This setting was unfortunately inherited by port programs. This commit restores handling of TERM signals in port programs to the default behavior. That is, terminate the process.
2018-09-06Merge branch 'rickard/pcre-8.42/OTP-15217' into maintRickard Green
* rickard/pcre-8.42/OTP-15217: Update PCRE from version 8.41 to version 8.42
2018-09-06Merge branch 'maint-21' into maintRickard Green
* maint-21: Updated OTP version Update release notes Update version numbers kernel: Fix missing abort_connection in net_kernel Prevent inconsistent node lists Fix an endless rescheduling loop when a process is executing process_info(self(), ...)
2018-09-06Merge pull request #1943 from max-au/handle_signals_before_dirty_gcRickard Green
Fix an endless rescheduling loop when a process is executing process_… OTP-15275
2018-09-05Merge branch 'rickard/dist-entry-gc-fix/OTP-15279' into maint-21Erlang/OTP
* rickard/dist-entry-gc-fix/OTP-15279: Prevent inconsistent node lists
2018-09-05Prevent inconsistent node listsRickard Green
If net_kernel "forgets" to abort a connection (as it currently might), the garbage collection of a distribution entry could cause node lists to enter an inconsistent state.
2018-09-05Merge branch 'sverker/erts/ets-memstat-false-leak/ERL-720/OTP-15278' into maintSverker Eriksson
* sverker/erts/ets-memstat-false-leak/ERL-720/OTP-15278: erts: Refactor ets FixedDeletion allocations erts: Fix ets memstat false leak of FixedDeletion
2018-09-04Fix an endless rescheduling loop when a process is executing ↵Maxim Fedorov
process_info(self(), ...) It is possible that a process has to yield before completing process_info BIF when it runs out of reductions. If this BIF is called by the process itself, it does not send a signal but executes in the context of a process. If it has to yield, it turns F_LOCAL_SIGS_ONLY flag on, which means new signals won't be fetched from the outer message queue. When the same process needs to execute dirty system code (e.g. dirty GC) it has to be run on a dirty scheduler. However signals enqueued into outer queue cause it to be rescheduled on a normal scheduler. F_LOCAL_SIGS_ONLY prevent outer queue signals delivery, creating an endless rescheduling loop. This commit disengages F_LOCAL_SIG_ONLY if process needs to execute dirty code in order to complete signal delivery and allow process to be moved to dirty run queue.
2018-09-04Merge PR-1920 from saleyn/float_to_list OTP-15276Sverker Eriksson
Fix bug in compact representation of float_to_list/2
2018-09-04Implement socket option recvtos and friendsRaimo Niskanen
Implement socket options recvtclass, recvtos, recvttl and pktoptions. Document the implemented socket options, new types and message formats. The options recvtclass, recvtos and recvttl are boolean options that when activated (true) for a socket will cause ancillary data to be received through recvmsg(). That is for packet oriented sockets (UDP and SCTP). The required options for this feature were recvtclass and recvtos, and recvttl was only added to test that the ancillary data parsing handled multiple data items in one message correctly. These options does not work on Windows since ancillary data is not handled by the Winsock2 API. For stream sockets (TCP) there is no clear connection between a received packet and what is returned when reading data from the socket, so recvmsg() is not useful. It is possible to get the same ancillary data through a getsockopt() call with the IPv6 socket option IPV6_PKTOPTIONS, on Linux named IPV6_2292PKTOPTIONS after the now obsoleted RFC where it originated. (unfortunately RFC 3542 that obsoletes it explicitly undefines this way to get packet ancillary data from a stream socket) Linux also has got a way to get packet ancillary data for IPv4 TCP sockets through a getsockopt() call with IP_PKTOPTIONS, which appears to be Linux specific. This implementation uses a flag field in the inet_drv.c socket internal data that records if any setsockopt() call with recvtclass, recvtos or recvttl (IPV6_RECVTCLASS, IP_RECVTOS or IP_RECVTTL) has been activated. If so recvmsg() is used instead of recvfrom(). Ancillary data is delivered to the application by a new return tuple format from gen_udp:recv/2,3 containing a list of ancillary data tuples [{tclass,TCLASS} | {tos,TOS} | {ttl,TTL}], as returned by recvmsg(). For a socket in active mode a new message format, containing the ancillary data list, delivers the data in the same way. For gen_sctp the ancillary data is delivered in the same way, except that the gen_sctp return tuple format already contained an ancillary data list so there are just more possible elements when using these socket options. Note that the active mode message format has got an extra tuple level for the ancillary data compared to what is now implemented gen_udp. The gen_sctp active mode format was considered to be the odd one - now all tuples containing ancillary data are flat, except for gen_sctp active mode. Note that testing has not shown that Linux SCTP sockets deliver any ancillary data for these socket options, so it is probably not implemented yet. Remains to be seen what FreeBSD does... For gen_tcp inet:getopts([pktoptions]) will deliver the latest received ancillary data for any activated socket option recvtclass, recvtos or recvttl, on platforms where IP_PKTOPTIONS is defined for an IPv4 socket, or where IPV6_PKTOPTIONS or IPV6_2292PKTOPTIONS is defined for an IPv6 socket. It will be delivered as a list of ancillary data items in the same way as for gen_udp (and gen_sctp). On some platforms, e.g the BSD:s, when you activate IP_RECVTOS you get ancillary data tagged IP_RECVTOS with the TOS value, but on Linux you get ancillary data tagged IP_TOS with the TOS value. Linux follows the style of RFC 2292, and the BSD:s use an older notion. For RFC 2292 that defines the IP_PKTOPTIONS socket option it is more logical to tag the items with the tag that is the item's, than with the tag that defines that you want the item. Therefore this implementation translates all BSD style ancillary data tags to the corresponding Linux style data tags, so the application will only see the tags 'tclass', 'tos' and 'ttl' on all platforms.
2018-09-03erts: Refactor ets FixedDeletion allocationsSverker Eriksson
2018-09-03erts: Fix ets memstat false leak of FixedDeletionSverker Eriksson
causing erlang:memory to report too much ets memory.
2018-09-03ops.tab: Fix potentially unsafe optimization of raise/2Björn Gustavsson
The operands for the raise/2 instruction are almost always in x(2) and x(1). Therefore the loader translates the raise/2 instruction to an i_raise/0 instruction which uses the values in x(2) and x(1). If the operands happens to be in other registers, the loader inserts move/2 instruction to move them to x(2) and x(1). The problem is that x(3) is used as a temporary register when generating the move/2 instructions. That is unsafe if the Value operand for raise/2 is x(3). Thus: raise x(0) x(3) will be translated to: move x(0) x(3) move x(3) x(1) move x(3) x(2) i_raise The Trace will be written to both x(2) and x(1). The current compiler will never use x(3) for the Value operand, so there is no need to patch previous releases. But a future compiler version might allocate registers differently.
2018-08-31Fix an endless rescheduling loop when a process is executing ↵Maxim Fedorov
process_info(self(), ...) It is possible that a process has to yield before completing process_info BIF when it runs out of reductions. If this BIF is called by the process itself, it does not send a signal but executes in the context of a process. If it has to yield, it turns F_LOCAL_SIGS_ONLY flag on, which means new signals won't be fetched from the outer message queue. When the same process needs to execute dirty system code (e.g. dirty GC) it has to be run on a dirty scheduler. However signals enqueued into outer queue cause it to be rescheduled on a normal scheduler. F_LOCAL_SIGS_ONLY prevent outer queue signals delivery, creating an endless rescheduling loop. This commit disengages F_LOCAL_SIG_ONLY if process needs to execute dirty code in order to complete signal delivery and allow process to be moved to dirty run queue.
2018-08-30Merge branch 'maint-21' into maintRickard Green
* maint-21: Updated OTP version Update release notes Update version numbers Fix missing 'in' trace events during 'running' trace
2018-08-29Merge branch 'rickard/running-trace-fix/ERL-713/OTP-15269' into maint-21Erlang/OTP
* rickard/running-trace-fix/ERL-713/OTP-15269: Fix missing 'in' trace events during 'running' trace
2018-08-27Fix bug in compact representation of float_to_list/2Serge Aleynikov
2018-08-27Fix missing 'in' trace events during 'running' traceRickard Green
'in' trace events could be lost when a process had to be rescheduled on another scheduler type (normal <-> dirty).
2018-08-21Merge branch 'rickard/fix-suspend-monitor-down/OTP-15237/ERL-704' into maintRickard Green
* rickard/fix-suspend-monitor-down/OTP-15237/ERL-704: Fix incoming suspend monitor down