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* nox/erl_eval-receive/OTP-11137:
Updated primary bootstrap for erl_eval
Added preloaded prim_eval
Fix receive support in erl_eval with a BEAM module
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* bjorn/stdlib/improve-ls/OTP-11108:
Teach c:ls/1 to show non-directory files
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Using the low-level BEAM instructions, we can loop over each message in
the process queue and removes the first message that matches, without
receiving them all to later send them back to itself.
The function prim_eval:'receive'/2 is equivalent to the
following pseudo-code:
'receive'(F, T) ->
RESET MESSAGE QUEUE POINTER,
LOOP:
case PEEK CURRENT MESSAGE WITH TIMEOUT T of
{ok,Msg} ->
case F(Msg) of
nomatch ->
DECREMENT TIMEOUT T,
ADVANCE MESSAGE QUEUE POINTER,
GOTO LOOP;
Result ->
RESET MESSAGE QUEUE POINTER,
Result
end;
timeout ->
RESET MESSAGE QUEUE POINTER,
timeout
end.
To not break Dialyzer and other tools, we use a stub Erlang module which
abstract code is forcefully inserted into prim_inet.erl afterwards
compilation.
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In an email to erlang-questions, Bengt Kleberg wrote:
When I use c:ls/1 it reminds me so much of Unix "ls" that I
expect c:ls("filename") to work. The resulting error surprises
me every time (not the same day).
While teaching c:ls/1 to show non-directory files, update the
error handling to make use of the POSIX error codes from
file:list_dir/1 and file:format_error/1 (which had not been
invented when the c module was first implemented).
Suggested-by: Bengt Kleberg
Test-suite-by: Bengt Kleberg
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Since both the STDLIB and compiler applications turn warnings
into errors, we must stop using the old deprecated crypto functions.
While we are at it, generalize the format of the key tuple returned
by beam_lib:make_crypto_key/2 to facilitate introducing new crypto
methods in the future. Change the format to:
{Type,Key,IV,BlockSize}
where Type, Key, and IV are the first three arguments for either
crypto:block_encrypt4/ or crypto:block_decrypt/4, and BlockSize
is the block size for the crypto algorithm (it is needed to properly
pad the plaintext blocks before encryption).
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* siri/cuddle-with-tests:
Fix gen_server_SUITE:call_with_huge_message_queue
Fix zip_SUITE:borderline test
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Thanks to Tomáš Janoušek.
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* sverk/ets-test-cuddle:
stdlib: Make memcheck in ets_SUITE less sensitive
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* nox/fix-epp-file-attrs/OTP-11079:
Fix an inconsistent state in epp
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This test always fails when gen is native compiled, since the
optmization is not implemented then. The test is now skipped when
running with hipe.
The test does also quite often fail on one of the test hosts which
runs in a virtual machine. The reason is that the clock runs "in
bursts" on this host, which is outside of the control of the erlang VM
and probably due to the fact that the host runs as a virtual
machine. To overcome this problem, the echo message is now sent 10000
times instead of 10 times - i.e. the test run is prolonged in order to
even out the effect of the bursts.
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This test fails on a test host where no proper unix unzip is
installed. This has been corrected.
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This function is used all over the place in OTP itself and people
sometimes want that functionality, they may as well not reimplement it
themselves.
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When entering a new file, epp doesn't properly set #epp.name2 like it
does on initialisation, generating a malformed file attribute when it
leaves the file.
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I've found stdlib's timer to burn CPU without good reason. Here's what
happens.
The problem is that it sleeps in milliseconds but computes time in
microseconds. And there is bug in code to compute milliseconds to
sleep. It computes microseconds difference between now and nearest
timer event and then does _truncating_ division by 1000. So on average
it sleeps 500 microseconds _less than needed_. On wakeup its checks do
I have timer tick that already occurred? No. Ok how much I need to
sleep ? It does that bad computation again and gets 0
milliseconds. So next gen_server timeout happens right away only to
find we're still before closest timer tick and to decide to sleep 0
milliseconds again. And again and again.
This commit changes division to pick ceiling of ratio rather than
floor. So that we always sleep not less then difference between now
and closest event time.
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* siri/doc-fnu-opts/OTP-10901:
Add documentation of w, i and e addition to +fnu and +fna switches to erl
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These were documented in the stdlib user's guide, but not in the
reference manual for erl. This has now been corrected.
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* bjorn/fix-encoding/OTP-11041:
Encode Erlang source files with non-ascii characters in UTF-8
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To ensure that 'master' compiles when we merge 'maint' to it,
regardless of which encoding is default in 'master', all source
files with non-ascii characters *must* have the encoding specified.
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* lh/demonitor-flush/OTP-11039:
Use erlang:demonitor(Ref, [flush]) where applicable
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* lh/otp-optims/OTP-11035:
Use erlang:demonitor's flush option on timeout
Don't lookup the node unless required in gen:call/{3,4}
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* sverk/dets_remove_test_otp_9607:
stdlib: Fix unstable testcase ets_SUITE:delete_large_named_table
stdlib: Remove obsolete testcase dets_SUITE:otp_9607
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* sv/stdlib/sys-get-state/OTP-11013:
Removed ?line macro
add sys:get_state/1,2 and sys:replace_state/2,3
update sys:get_status/2,3 documentation for gen_event
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In rest_for_one and one_for_all supervisors one child dying can cause
multiple children to be restarted. Previously if the child that caused
the restart is started successfully but another child fails to start,
the supervisor would not terminate this child with the other
successfully restarted children as no record of the pid was kept. Thus
the supervisor would try to start this child again. This could lead to
multiples of the same child or if the child is registered cause repeated
attempts at starting this child - until the max restart threshold was
reached.
Now the child that failed to start becomes the restarting child, instead
of staying with the same child, for the next restart attempt. This has
the following side effects:
1) In one_for_all the new version of the child that original died is
terminated before a restart attempt is made.
2) In rest_for_one all succesfully restarted children are not terminated
and restarting continues from the child that failed to start.
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At Erlang Factory 2013 there was discussion during one of the talks about
the sys:get_status functions and how useful they were for debugging. Geoff
Cant mentioned it would be very useful if the sys module also provided
functions to use while debugging to get just the state of a process and
also to be able to replace the state of a process, and many others in the
audience appeared to agree.
The sys:get_state/1,2 functions return the state of a gen_server, gen_fsm,
or gen_event process. The return value varies depending on the process
type: process state for a gen_server, state name and state data for a
gen_fsm, and handler module, handler id, and handler state for each handler
registered in a gen_event process.
The sys:replace_state/2,3 functions allow the state of a gen_server,
gen_fsm, or gen_event process to be replaced with a new state. These
functions take a function argument that updates or replaces the process
state; using a function to change the state eliminates the race condition
of first reading the state via sys:get_state/1 or sys:get_state/2, using
its return value to create a new state, and then replacing the old state
with the new state, since during that time the process might have received
other calls or messages that could have changed its state.
* For a gen_server process, the state replacement function takes the
process state as an argument and returns a new state.
* For a gen_fsm process, the state replacement function gets a tuple of
{StateName, StateData} and returns a similar tuple that specifies a new
state name, new state data, or both.
* For a gen_event process, the state replacement function is called for
each registered event handler. It gets a tuple {Module, Id, HandlerState}
and returns a similar tuple that specifies the same Module and Id values
but may specify a different value for HandlerState.
If the state replacement function crashes or results in an error, the
original state of a gen_server or gen_fsm process is maintained; if such a
crash occurs for a gen_event process, the original state of the event
handler for which the state replacement function was called is maintained,
but the states of other event handlers of the same gen_event process may
still be updated if no errors or crashes occur while replacing their
states.
Add documentation for sys:get_state/1,2 and sys:replace_state/2,3. The
documentation explicitly notes that the functions are intended for use
during debugging.
Add new tests for these functions to gen_server_SUITE, gen_fsm_SUITE, and
gen_event_SUITE.
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It is equivalent to the few lines removed, except more efficient.
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Move some operations that aren't required for the happy path.
The operations were small, so they shouldn't show a big difference
in benchmarks except for systems with many active gen processes.
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Modify the documentation for the sys:get_status/2,3 functions to reflect
that they also work on gen_event processes, and add a cross reference for
gen_event:format_status/2 to go along with the existing cross references
for gen_server and gen_fsm.
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A bug has been fixed: when given the option {encoding,utf8} a list of
floating point numbers (in the correct interval) was mistakenly
returned as a string.
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The scanner did not crash when a floating point number was encountered
in the input string.
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Remove the call trace from this testcase as we cannot guarantee named
table to be gone until ets:delete returns anyway.
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* dgud/testcase_fixes:
Fix timers
mnesia: Decrease test times
Add debug printouts
wx: Fix failing testcases
stdlib: Ignore symlink tests on windows
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The manual says that an Emacs directive can be placed on the second
line. With this patch that directive is also recognized when selecting
encoding of the script.
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shell_SUITE: Calling i() did not work because if there are more than
100 processes c:i() will go into pager mode, asking for input.
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io_proto_SUITE: node names containing some '-' did not work.
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The test case deletes a Dets process while it is repairing a file.
Another client waiting for the Dets process to reply then kicks in and
repairs the file. Apparently the temporary file was still open,
resulting in an eacces error on Windows.
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* mh/supervisor-doc/OTP-10938:
Delete obsolete note about simple-one-for-one supervisor
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* sverk/test-cuddling:
stdlib: Remove race in ets_SUITE:delete_large_tab
stdlib: Remove race in ets_SUITE:delete_large_named_table
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Since commit 47759479146ca11ad81eca0bb3236b265e20601d,
simple-one-for-one supervisors _do_ kill their children explicitly on
shutdown. That commit also removed this note, but it seems like the
merge commit 45b4d5309e0686cc5fa28506de76f75b598bbd95 incorrectly
reinstated it.
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