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path: root/erts/emulator/sys/unix/sys_drivers.c
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2019-04-09erts: Fix sys_driver to correctly deselect fdsLukas Larsson
Incorrect precidence rules made the driver never deselect the given fds.
2019-01-28erts: Add magic port control numbersSverker Eriksson
to increase the probablity of a nice badarg from erlang:port_control.
2019-01-18erts: Fix too early close of spawn driver fdLukas Larsson
2018-08-10erts: Delete fd from poll-set when closing fd_driver portLukas Larsson
2018-07-30erts: Handle EMFILE errors in forker_driver for writeLukas Larsson
Before this change, if a write to the uds failed due to EMFILE to ETOOMANYREFS the entire vm would crash. This change makes it so that an SIGCHLD is simulated to that the error is propagated to the user instead of terminating the VM.
2018-06-18Update copyright yearHenrik Nord
2018-03-20erts: Make sys_memcpy and friends inline functionsSverker Eriksson
to avoid argument-evaluated-twice bugs like in macro DMC_PUSH. Had to shuffle around some #include and #define to make erl_child_setup build debug target.
2018-01-03Replace the libc environment with a thread-safe emulationJohn Högberg
putenv(3) and friends aren't thread-safe regardless of how you slice it; a global lock around all environment operations (like before) keeps things safe as far as our own operations go, but we have absolutely no control over what libc or a library dragged in by a driver/NIF does -- they're free to call getenv(3) or putenv(3) without honoring our lock. This commit solves this by setting up an "emulated" environment which can't be touched without going through our interfaces. Third-party libraries can still shoot themselves in the foot but benign uses of os:putenv/2 will no longer risk crashing the emulator.
2017-10-02erts: Add multiple poll setsSverker Eriksson
2017-07-17erts: Replace usage of all erts_smp prefixes to just ertsLukas Larsson
2017-07-17erts: Cleanup removal of non-smp emulatorsLukas Larsson
2017-07-17erts: Remove ERTS_SMP and USE_THREAD definesLukas Larsson
This refactor was done using the unifdef tool like this: for file in $(find erts/ -name *.[ch]); do unifdef -t -f defile -o $file $file; done where defile contained: #define ERTS_SMP 1 #define USE_THREADS 1 #define DDLL_SMP 1 #define ERTS_HAVE_SMP_EMU 1 #define SMP 1 #define ERL_BITS_REENTRANT 1 #define ERTS_USE_ASYNC_READY_Q 1 #define FDBLOCK 1 #undef ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT #define ERTS_POLL_ASYNC_INTERRUPT_SUPPORT 0 #define ERTS_POLL_USE_WAKEUP_PIPE 1 #define ERTS_POLL_USE_UPDATE_REQUESTS_QUEUE 1 #undef ERTS_HAVE_PLAIN_EMU #undef ERTS_SIGNAL_STATE
2017-05-04Update copyright yearRaimo Niskanen
2017-04-21Do not ignore SIGTERM when VM has been started with +BiRickard Green
2016-07-11Merge branch 'lukas/erts/spawn_driver_relative_cd/ERL-175/OTP-13733' into maintLukas Larsson
* lukas/erts/spawn_driver_relative_cd/ERL-175/OTP-13733: erts: Add port_SUITE:cd invalid dir testcase erts: Fix spawn driver with relative cd option erts: Fix HARD_DEBUG printouts in erl_child_setup erts: Improve error printouts in erl_child_setup Conflicts: erts/emulator/test/port_SUITE.erl
2016-07-01erts: Fix spawn driver with relative cd optionLukas Larsson
2016-06-21erts: Add test port_SUITE:pipe_limit_envSverker Eriksson
for 9f779819f6bda734c595.
2016-06-20erts: Optimize spawn driver for large(r) environmentsSverker Eriksson
that need to be enqueued.
2016-06-20erts: Fix spawn driver when env size is above pipe capacitySverker Eriksson
Symptom: open_port() succeeds, port program never starts but instead seem to terminate with exit_status 150 (EINVAL+128). When: If the command payload buffer (including the entire environment) for the port program is between 1 to 4 bytes above the pipe capacity, which is 65536 bytes on newer Linux, but can be as low as 4096 on older 32-bit Linux. Since: OTP-19.0-rc1.
2016-03-15update copyright-yearHenrik Nord
2016-02-24Merge branch 'master' into sverk/master/halt-INT_MINSverker Eriksson
2015-12-15erts: Only use forker StackAck on freebsdLukas Larsson
2015-12-15erts: Add forker StartAck for port start flowcontrolLukas Larsson
An acknowledgement of the Start command has to be managed as we have to make sure that packages are not dropped and also that the close calls do not happen too early.
2015-12-15erts: Move os_pid to port hash to child setupLukas Larsson
Had to move the hashing because of a race that can otherwise happen where a new os_pid value was inserted into the hash before the previous value had been removed. Also replaced the protocol inbetween erts and child setup to be a binary protocol. This was done in order to deal with the varying size of Eterm.
2015-12-15erts: Make child_setup work with large environmentsLukas Larsson
2015-12-15erts: Fix dereferencing of unaligned integer for sparcLukas Larsson
2015-12-15erts: Create forker process for spawn driverLukas Larsson
Instead of forking from the beam process, we create a separate process in which all forks are done. This has several advantages: 1) performance: * don't have to close all fd's in the world * fork only has to copy stuff from a small process * work is done in a completely seperate process * a 3x performance increase has been measured, can be made even greater (10x) if we cache the environment in child setup 2) stability * the exec is done in another process than beam, which means that if the file that we exec to is on an nfs that is not available right now we will not block a scheduler until the nfs returns. 3) simplicity * don't have to deal with SIGCHLD in the erts Unfortunately, this solution also implies some badness. 1) There will always be a seperate process running together with beam on unix. This could be confusing and undesirable. 2) We have to transfer the entire environment to child_setup for each command. OTP-13088
2015-12-15erts: Move sys drivers to another fileLukas Larsson