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2016-05-11Merge branch 'raimo/polish-gen_statem/OTP-13065'Raimo Niskanen
* raimo/polish-gen_statem/OTP-13065: Reword 'dispatch' into 'branch depending'
2016-05-11Reword 'dispatch' into 'branch depending'Raimo Niskanen
2016-05-11Merge branch 'lukas/erts/max_heap_size/OTP-13174'Lukas Larsson
* lukas/erts/max_heap_size/OTP-13174: erts: Fix max heap size exit when in hipe mode Update preloaded modules erts: Fix pre-bif yield current_function erts: Implement max_heap_size process flag
2016-05-10stdlib: Fix missing anchor in epp docsLukas Larsson
2016-05-10erts: Implement max_heap_size process flagLukas Larsson
The max_heap_size process flag can be used to limit the growth of a process heap by killing it before it becomes too large to handle. It is possible to set the maximum using the `erl +hmax` option, `system_flag(max_heap_size, ...)`, `spawn_opt(Fun, [{max_heap_size, ...}])` and `process_flag(max_heap_size, ...)`. It is possible to configure the behaviour of the process when the maximum heap size is reached. The process may be sent an untrappable exit signal with reason kill and/or send an error_logger message with details on the process state. A new trace event called gc_max_heap_size is also triggered for the garbage_collection trace flag when the heap grows larger than the configured size. If kill and error_logger are disabled, it is still possible to see that the maximum has been reached by doing garbage collection tracing on the process. The heap size is defined as the sum of the heap memory that the process is currently using. This includes all generational heaps, the stack, any messages that are considered to be part of the heap and any extra memory the garbage collector may need during collection. In the current implementation this means that when a process is set using on_heap message queue data mode, the messages that are in the internal message queue are counted towards this value. For off_heap, only matched messages count towards the size of the heap. For mixed, it depends on race conditions within the VM whether a message is part of the heap or not. Below is an example run of the new behaviour: Eshell V8.0 (abort with ^G) 1> f(P),P = spawn_opt(fun() -> receive ok -> ok end end, [{max_heap_size, 512}]). <0.60.0> 2> erlang:trace(P, true, [garbage_collection, procs]). 1 3> [P ! lists:duplicate(M,M) || M <- lists:seq(1,15)],ok. ok 4> =ERROR REPORT==== 26-Apr-2016::16:25:10 === Process: <0.60.0> Context: maximum heap size reached Max heap size: 512 Total heap size: 723 Kill: true Error Logger: true GC Info: [{old_heap_block_size,0}, {heap_block_size,609}, {mbuf_size,145}, {recent_size,0}, {stack_size,9}, {old_heap_size,0}, {heap_size,211}, {bin_vheap_size,0}, {bin_vheap_block_size,46422}, {bin_old_vheap_size,0}, {bin_old_vheap_block_size,46422}] flush(). Shell got {trace,<0.60.0>,gc_start, [{old_heap_block_size,0}, {heap_block_size,233}, {mbuf_size,145}, {recent_size,0}, {stack_size,9}, {old_heap_size,0}, {heap_size,211}, {bin_vheap_size,0}, {bin_vheap_block_size,46422}, {bin_old_vheap_size,0}, {bin_old_vheap_block_size,46422}]} Shell got {trace,<0.60.0>,gc_max_heap_size, [{old_heap_block_size,0}, {heap_block_size,609}, {mbuf_size,145}, {recent_size,0}, {stack_size,9}, {old_heap_size,0}, {heap_size,211}, {bin_vheap_size,0}, {bin_vheap_block_size,46422}, {bin_old_vheap_size,0}, {bin_old_vheap_block_size,46422}]} Shell got {trace,<0.60.0>,exit,killed}
2016-05-09Merge branch 'raimo/polish-gen_statem/OTP-13065'Raimo Niskanen
* raimo/polish-gen_statem/OTP-13065: Fix all seealso and other minor changes Editorial update
2016-05-09Fix all seealso and other minor changesRaimo Niskanen
2016-05-09Merge branch 'xsipewe_gen_statem1' of https://github.com/xsipewe/otp into ↵Raimo Niskanen
raimo/polish-gen_statem/OTP-13065 Conflicts: lib/stdlib/doc/src/gen_statem.xml
2016-05-09Merge branch 'bjorn/stdlib/warning-and-error/OTP-13476'Björn Gustavsson
* bjorn/stdlib/warning-and-error/OTP-13476: Add documentation epp: Add the -error and -warning directives epp: Refactor expansion of header path
2016-05-06Editorial updatexsipewe
2016-05-04Merge branch 'raimo/polish-gen_statem/OTP-13065'Raimo Niskanen
* raimo/polish-gen_statem/OTP-13065: Fix documentation Clean up terminate functions Fix callback mode after code change not used Restructure loop_* to clarify S handling
2016-05-04Fix documentationRaimo Niskanen
2016-05-04epp: Add the -error and -warning directivesBjörn Gustavsson
If one of several alternatives configurations are required for an Erlang module to compile, but none are available, it would be useful to give a nice error message. For example: -ifdef(CONFIG_A). %% Some code if A is true. -else. -ifdef(CONFIG_B). %% Some code if B is true. -else. -error("Neither CONFIG_A nor CONFIG_B are available"). -endif. -endif. If neither CONFIG_A nor CONFIG_B are defined, the error message will be: module.erl:10: -error("Neither CONFIG_A nor CONFIG_B are available"). That is basically the same behavior as for the #error directive in GCC. For symmetry with the -error directive, add the -warning directive to generate a compiler warning. For example: -ifdef(HAVE_COOL_FEATURE). %% Code if we have Cool Feature. -else. %% Inefficient fallback code. -warning("Using inefficient fallback"). -endif. If HAVE_COOL_FEATURE is not defined, the warning message will be: module.erl:8: Warning: -warning("Using inefficient fallback"). That is basically the same behavior as for the #warning directive in GCC. Conflicts: lib/stdlib/src/epp.erl lib/stdlib/test/epp_SUITE.erl
2016-05-04epp: Refactor expansion of header pathBjörn Gustavsson
scan_include_lib/4 uses a helper function find_lib_dir/1, which has a strange interface. It takes a string and returns a tuple. The caller must match the tuple and call fname_join/1 to obtain the desired result. I assume that the strange interface was not noticed because the function is only used in one place. Replace the find_lib_dir/1 with a new expand_lib_dir/1 function which does the entire job in one go. The new function is much easier to reuse in other places, which we might want to do in a future commit.
2016-05-03Merge branch 'egil/stdlib/fix-maps-alias/ERL-135/OTP-13534'Björn-Egil Dahlberg
* egil/stdlib/fix-maps-alias/ERL-135/OTP-13534: stdlib: Strengthen map pattern tests stdlib: Add lint tests for parallel match of maps stdlib: Refactor erl_lint_SUITE stdlib: Fix linting of map key variables
2016-05-03Merge branch 'lukas/erts/rename_xmqd_to_hmqd/OTP-13366'Lukas Larsson
* lukas/erts/rename_xmqd_to_hmqd/OTP-13366: erts: Rename erl flag +xmqd to +hmqd in erlexec Fix proc_lib message_queue_data spec erts: Fix total_heap_size calculation for on_heap erts: Rename erl flag +xmqd to +hmqd
2016-05-02stdlib: Strengthen map pattern testsBjörn-Egil Dahlberg
2016-05-02stdlib: Add lint tests for parallel match of mapsBjörn-Egil Dahlberg
2016-05-02stdlib: Refactor erl_lint_SUITEBjörn-Egil Dahlberg
2016-05-02stdlib: Fix linting of map key variablesBjörn-Egil Dahlberg
Map keys cannot be bound and then used in parallel matching. Example: #{ K := V } = #{ k := K } = M. This is illegal if 'K' is not already bound.
2016-04-29Merge branch 'jlouis/stdlib/implement-lists-join/PR-1012/OTP-13523'Björn Gustavsson
* jlouis/stdlib/implement-lists-join/PR-1012/OTP-13523: Implement lists:join/2
2016-04-28stdlib: Correct association typesHans Bolinder
'...' is allowed at the end of of association types.
2016-04-28stdlib: Add shadow comments for BIFs in mapsBjörn-Egil Dahlberg
Type information is stored in erl_bif_types for certain BIFs. This fact must be stated in the type specification for the stubs that are superceded by erl_bif_types. * Shadowed by erl_bif_types: maps:from_list/1 * Shadowed by erl_bif_types: maps:get/2 * Shadowed by erl_bif_types: maps:is_key/2 * Shadowed by erl_bif_types: maps:merge/2 * Shadowed by erl_bif_types: maps:put/3 * Shadowed by erl_bif_types: maps:to_list/1 * Shadowed by erl_bif_types: maps:update/3
2016-04-28stdlib: Add pretty-printing of exact map typesHans Bolinder
2016-04-28stdlib: Correct a type in module eppHans Bolinder
2016-04-28Enhance map specs in erts, stdlib, runtime_toolsMagnus Lång
Using the new type syntax, we can specify which keys are required, and which are optional in a way Dialyzer could use.
2016-04-28erl_parse: Add parsing for new map type syntaxMagnus Lång
erl_types typesets mandatory keys with :=, and uses "..." as a shorthand for "any() => any()". Add these to erl_parse so that all representable types can be written in type-specs.
2016-04-28Merge branch 'egil/maps-api-additions/PR-1025/OTP-13522'Björn-Egil Dahlberg
* egil/maps-api-additions/PR-1025/OTP-13522: stdlib: Document maps:update_with/3,4 stdlib: Add tests for maps:update_with/3,4 stdlib: Add maps:update_with/3,4 erts: Add tests for maps:take/2 stdlib: Document maps:take/2 erts: Add BIF maps:take/2
2016-04-28Clean up terminate functionsRaimo Niskanen
2016-04-27stdlib: Document maps:update_with/3,4Björn-Egil Dahlberg
2016-04-27stdlib: Add tests for maps:update_with/3,4Björn-Egil Dahlberg
2016-04-27stdlib: Add maps:update_with/3,4Björn-Egil Dahlberg
Maps equivalent to dict:update/3,4
2016-04-27stdlib: Document maps:take/2Björn-Egil Dahlberg
2016-04-27Fix callback mode after code change not usedRaimo Niskanen
2016-04-27Restructure loop_* to clarify S handlingRaimo Niskanen
2016-04-27Merge branch 'raimo/polish-gen_statem/OTP-13065'Raimo Niskanen
* raimo/polish-gen_statem/OTP-13065: Fix hibernation subtlety
2016-04-27Fix hibernation subtletyRaimo Niskanen
2016-04-26Fix proc_lib message_queue_data specLukas Larsson
2016-04-26Remove extra ">" in exampleseksperimental
2016-04-25Merge branch 'raimo/new-gen-state-machine/OTP-13065'Raimo Niskanen
* raimo/new-gen-state-machine/OTP-13065: (52 commits) Add section on state filtering Promote gen_statem over gen_fsm Modify code_change/4 to return CallbackMode Use ?NAME macro in examples Introduce Fred Herbert suggested additions Introduce corrections from Fred Hebert and Ingela Use .png pictures instead of .gif Write Design Principles chapter Fix missing short forms for event timeout Do more intricate Fred Hebert doc changes Change Caller -> From as suggested by Fred Hebert Do documentation improvements from Fred Hebert Fix broken documenation reference Rename state_timeout -> event_timeout Fix most of the system docs and emacs mode Change code_change/4 to {ok,State,Data} Fixup sharpened test suite Sharpen test suite Remove the remove_event action and all alike Relax caller() type check and cleanup ... Conflicts: lib/stdlib/src/gen.erl lib/stdlib/src/gen_event.erl lib/stdlib/src/gen_fsm.erl lib/stdlib/src/gen_server.erl lib/stdlib/test/error_logger_forwarder.erl
2016-04-25stdlib: Remove use of crypto:rand_bytes/1Ingela Anderton Andin
The use case is not cryptographical but we want to compare Erlang implementation to c implementation so use crypto:strong_rand_bytes anyway.
2016-04-25crypto: Deprecate rand_bytes/1Ingela Anderton Andin
OpenSSL has deprecated the function RAND_pseudo_bytes used by crypto:rand_bytes/1, so this function is now deprecated in OTP too. rand_bytes/3 also used this function, but was not documented so we can remove it right away. This commit also removes the fallback in generate_key to use rand_bytes/1 if strong_rand_bytes/1 throws low entropy. This is a potential incompatibility but we think it is desirable as crypto should provide cryptographically secure functions.
2016-04-22erts: Add BIF maps:take/2Björn-Egil Dahlberg
2016-04-22Promote gen_statem over gen_fsmRaimo Niskanen
2016-04-21Modify code_change/4 to return CallbackModeRaimo Niskanen
Also move check of non-atom states in callback mode state_functions to where the state function is called. This gives homogenous diagnostics for state functions, code_change/4 and system_replace_state StateFun. Irregularities pointed out by James Fish.
2016-04-21Avoid dialyzer warnings for unreachable code in assertsRichard Carlsson
Dialyzer would warn about uses of the ?assert(BoolExpr) macro in assert.hrl if the argument was known to be boolean-only.
2016-04-21Make assert macro implementations uniformRichard Carlsson
2016-04-19stdlib: Fix warningsHans Bolinder
2016-04-18stdlib: The type map() is built-inHans Bolinder
2016-04-18Introduce corrections from Fred Hebert and IngelaRaimo Niskanen
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