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2018-07-18Merge branch 'john/erts/kqueue-stdin-polling/OTP-15169/ERL-647' into maint-21Erlang/OTP
* john/erts/kqueue-stdin-polling/OTP-15169/ERL-647: Use fallback pollset for stdin and friends when using kqueue
2018-07-18Merge branch 'john/erts/fix-literal-map-elements/OTP-15184' into maint-21Erlang/OTP
* john/erts/fix-literal-map-elements/OTP-15184: Fix a rare crash when matching on literal maps
2018-07-13Fix a rare crash when matching on literal mapsJohn Högberg
When matching on a literal map, the map is placed into the general scratch register first. This is fine in isolation, but when the key to be matched was in a Y register it would also be placed in the scratch register, overwriting the map and crashing the emulator.
2018-07-12Fix trace_info/2Rickard Green
2018-07-03Use fallback pollset for stdin and friends when using kqueueJohn Högberg
This is a hack to make the "noshell" option work; kqueue can poll these fds but will not report EV_EOF. This may be common to all all pipes but we have no way to tell whether an fd is a pipe or not.
2018-06-29Merge branch 'john/erts/merge-OTP-15067' into maint-21Erlang/OTP
* john/erts/merge-OTP-15067: Don't enqueue system tasks if target process is in fail_state Fix erroneous schedule of freed/exiting processes Fix deadlock in run queue evacuation Fix memory leak of processes that died in the run queue
2018-06-21Fix environment case sensitivity issues on WindowsJohn Högberg
2018-06-18Update copyright yearHenrik Nord
2018-06-14Merge branch 'john/erts/fix-process-schedule-after-free/OTP-15067/ERL-573' ↵John Högberg
into john/erts/merge-OTP-15067
2018-06-14Don't enqueue system tasks if target process is in fail_stateJohn Högberg
The fail state wasn't re-checked in the state change loop; only the FREE state was checked. In addition to that, we would leave the task in the queue when bailing out which could lead to a double-free. This commit backports active_sys_enqueue from master to make it easier to merge onwards.
2018-06-12erts: Fix monitor_SUITE:remote_remove_monitorSverker Eriksson
to actually run remote on the slave node that it starts.
2018-06-04erts: Add system_info(ets_count)Sverker Eriksson
2018-05-18Merge branch 'sverker/system-profile-bug/OTP-15085'Sverker Eriksson
* sverker/system-profile-bug/OTP-15085: erts: Fix bug in system_profile
2018-05-18erts: Fix bug in system_profileSverker Eriksson
seen to cause redundant {profile,_,active,_,_} messages when process is terminating.
2018-05-17Merge PR-1819 from sverker/enif_binary_to_term-bug/OTP-15080Sverker Eriksson
Fix bug in enif_binary_to_term for immediates
2018-05-17tverlaan/add_dns_alternative_to_tcp_dist/PR-1694/OTP-15086Lukas Larsson
epmd: allow alternative to dns resolving for nodename
2018-05-16epmd: allow alternative to dns resolving for nodenameTimmo Verlaan
This makes it possible to create a custom integration with a key-value store for example. The key would then point to the actual address. You would have to write your own epmd module to make use of that feature.
2018-05-16Merge branch 'richcarl/eliminate_lib_module/PR-1786/OTP-15072'Hans Bolinder
* richcarl/eliminate_lib_module/PR-1786/OTP-15072: Fix minor issues Eliminate call to ct:get_progname() in ts_erl_config Use \n escape instead of integer 10 Move error formatting to erl_error.erl and delete lib.erl Move extended parse functions in lib.erl to erl_eval.erl Move lib:eval_str/1 into mod_esi.erl Remove lib:progname/0 Eliminate call to lib:progname/1 in slave.erl Add ct:get_progname/0 Remove lib:error_message/2 Remove lib:flush_receive/0 Remove lib:send/2 and lib:sendw/2 Move lib:nonl/1 into yecc.erl
2018-05-16erts: Fix bug in enif_binary_to_term for immediatesSverker Eriksson
Symptom: Heap corruption Expanded test case to provoke this bug and test some more term types.
2018-05-16New process suspend implementation based on async signalingRickard Green
2018-05-07Merge pull request #1802 from michalmuskala/map-is-key-bifBjörn Gustavsson
Introduce is_map_key/2 guard BIF OTP-15037
2018-05-04Move error formatting to erl_error.erl and delete lib.erlRichard Carlsson
2018-05-04Add ct:get_progname/0Richard Carlsson
This replaces all uses of lib:progname/0 in tests.
2018-04-29Introduce is_map_key/2 guard BIFMichał Muskała
This complements the `map_get/2` guard BIF introduced in #1784. Rationale. `map_get/2` allows accessing map fields in guards, but it might be problematic in more complex guard expressions, for example: foo(X) when map_get(a, X) =:= 1 or is_list(X) -> ... The `is_list/1` part of the guard could never succeed since the `map_get/2` guard would fail the whole guard expression. In this situation, this could be solved by using `;` instead of `or` to separate the guards, but it is not possible in every case. To solve this situation, this PR proposes a `is_map_key/2` guard that allows to check if a map has key inside a guard before trying to access that key. When combined with `is_map/1` this allows to construct a purely boolean guard expression testing a value of a key in a map. Implementation. Given the use case motivating the introduction of this function, the PR contains compiler optimisations that produce optimial code for the following guard expression: foo(X) when is_map(X) and is_map_key(a, X) and map_get(a, X) =:= 1 -> ok; foo(_) -> error. Given all three tests share the failure label, the `is_map_key/2` and `is_map/2` tests are optimised away. As with `map_get/2` the `is_map_key/2` BIF is allowed in match specs.
2018-04-27Merge branch 'siri/kernel/logger/OTP-13295'Siri Hansen
* siri/kernel/logger/OTP-13295: Add documentation of the built-in logger handlers Catch badarg in logger:get_format_depth/0 Add chars_limit option to logger_formatter Don't kill logger process until all other processes are dead Set call timeout for logger_server to infinity Update primary bootstrap Test cuddle for logger Update cth_log_redirect to a logger handler Start using logger internally in kernel and stdlib Remove error_logger process and add logger process Add logger
2018-04-26Test cuddle for loggerSiri Hansen
2018-04-25Do not run tests that conflicts with dirty schedulers testRickard Green
2018-04-25Merge branch 'map-get-bif' of git://github.com/michalmuskala/otpBjörn Gustavsson
* 'map-get-bif' of git://github.com/michalmuskala/otp: Introduce map_get guard-safe function OTP-15037
2018-04-25Merge branch 'lukas/erts/poll-thread/OTP-14346'Lukas Larsson
* lukas/erts/poll-thread/OTP-14346: erts: nif resource stop from poll-thread is a indirect call
2018-04-25Merge branch 'lukas/erts/dump_SUITE_fix'Lukas Larsson
* lukas/erts/dump_SUITE_fix: erts: Increase file read timeout for signal_abort test
2018-04-24Merge branch 'john/erts/fix-lcnt-toggle-test'John Högberg
* john/erts/fix-lcnt-toggle-test: Disregard locks that can't be toggled in lcnt_SUITE
2018-04-24Merge pull request #1790 from jhogberg/john/erts/more-alloc-info/OTP-14961John Högberg
Improve memory instrumentation OTP-15024 OTP-14961
2018-04-24Introduce map_get guard-safe functionMichał Muskała
Rationale Today all compound data types except for maps can be deconstructed in guards. For tuples we have `element/2` and for lists `hd/1` and `tl/1`. Maps are completely opaque to guards. This means matching on maps can't be abstracted into macros, which is often done with repetitive guards. It also means that maps have to be always selected whole from ETS tables, even when only one field would be enough, which creates a potential efficiency issue. This PR introduces an `erlang:map_get/2` guard-safe function that allows extracting a map field in guard. An alternative to this function would be to introduce the syntax for extracting a value from a map that was planned in the original EEP: `Map#{Key}`. Even outside of guards, since this function is a guard-BIF it is more efficient than using `maps:get/2` (since it does not need to set up the stack), and more convenient from pattern matching on the map (compare: `#{key := Value} = Map, Value` to `map_get(key, Map)`). Performance considerations A common concern against adding this function is the notion that "guards have to be fast" and ideally execute in constant time. While there are some counterexamples (`length/1`), what is more important is the fact that adding those functions does not change in any way the time complexity of pattern matching - it's already possible to match on map fields today directly in patterns - adding this ability to guards will niether slow down or speed up the execution, it will only make certain programs more convenient to write. This first version is very naive and does not perform any optimizations.
2018-04-24erts: nif resource stop from poll-thread is a indirect callLukas Larsson
2018-04-23erts: Rewrite memory instrumentationJohn Högberg
This commit replaces the old memory instrumentation with a new implementation that scans carriers instead of wrapping erts_alloc/erts_free. The old implementation could not extract information without halting the emulator, had considerable runtime overhead, and the memory maps it produced were noisy and lacked critical information. Since the new implementation walks through existing data structures there's no longer a need to start the emulator with special flags to get information about carrier utilization/fragmentation. Memory fragmentation is also easier to diagnose as it's presented on a per-carrier basis which eliminates the need to account for "holes" between mmap segments. To help track allocations, each allocation can now be tagged with what it is and who allocated it at the cost of one extra word per allocation. This is controlled on a per-allocator basis with the +M<S>atags option, and is enabled by default for binary_alloc and driver_alloc (which is also used by NIFs).
2018-04-23erts: Increase file read timeout for signal_abort testLukas Larsson
2018-04-23Merge branch 'lukas/erts/seq_tracer_nif/OTP-15029'Lukas Larsson
* lukas/erts/seq_tracer_nif/OTP-15029: Fix seq_trace erl_tracer bug Fix makefile mkdir warning
2018-04-19Make stacktraces consistent when backtrace_depth is 0Björn Gustavsson
It is allowed to set the backtrace depth to 0, but when an exception is catched the stacktrace will still contain one element: 1> erlang:system_flag(backtrace_depth, 0). 8 2> catch error(badarg). {'EXIT',{badarg,[{shell,apply_fun,3, [{file,"shell.erl"},{line,908}]}]}} However, when an exception is raised using `erlang:raise/3`, there will be no elements in the stacktrace: 3> catch erlang:raise(error, badarg, [{fake,name,[arg],[]}]). {'EXIT',{badarg,[]}} Since the `error_handler` module uses `erlang:raise/3` to raise an exception when an undefined function is called, there will not be any stacktrace when calling an undefined function: 4> catch undef_module:undef_name(some_argument). {'EXIT',{undef,[]}} Fix this inconsistency by changing `erlang:raise/3` so that it always includes one element in the stacktrace: 3> catch erlang:raise(error, badarg, [{fake,name,[arg],[]}]). {'EXIT',{badarg,[{fake,name,[arg],[]}]}} 4> catch undef_module:undef_name(some_argument). {'EXIT',{undef,[{undef_module,undef_name,[some_argument],[]}]}}
2018-04-18Merge branch 'sverker/lock-check-matrix'Sverker Eriksson
2018-04-16Disregard locks that can't be toggled in lcnt_SUITEJohn Högberg
2018-04-16Fix seq_trace erl_tracer bugLukas Larsson
2018-04-13Add zzz_SUITE with erts_debug:lc_graph last in testsSverker Eriksson
for erts, stdlib, kernel and runtime_tools.
2018-04-13Merge branch 'rickard/process_info/OTP-14966'Rickard Green
* rickard/process_info/OTP-14966: New process_info() implementation using signals
2018-04-12Merge PR-1770 from sverker/float_to_list-tweak/OTP-15015Sverker Eriksson
Improve float_to_list(F, [{decimals,D}])
2018-04-12New process_info() implementation using signalsRickard Green
2018-04-10erts: Workaround test t_float_to_string for windowsSverker Eriksson
2018-04-04Merge branch 'sverker/monitor-frenzy-fix'Sverker Eriksson
2018-04-04erts: Fix float_to_list(F, [{decimals,D}])Sverker Eriksson
to better conform with io_lib:format("~.*f", [D,F])
2018-04-04Merge pull request #1725 from michalmuskala/fun-literalsBjörn Gustavsson
Compile external fun expressions to literals OTP-15003
2018-03-28Merge branch 'sverker/driver-taints/OTP-14960'Sverker Eriksson
* sverker/driver-taints/OTP-14960: erts: Include foreign static linked drivers in taints erts: Fix harmless bug in macro IS_DRIVER_VERSION_GE erts: Remove our own NIF modules from "taints" erts: Refactor erts_static_nif_get_nif_init erts: Add dynamic loaded drivers to list of "taints"